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Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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03-08-2018 дата публикации

Ротор электрической машины с постоянными магнитами

Номер: RU0000182085U1
Автор: Андрей Владимирович Шилов, Анна Николаевна Русских, Вячеслав Владимирович Ишутинов
Принадлежит: Акционерное общество "Электромашиностроительный завод "ЛЕПСЕ"

Полезная модель относится к области электротехники, а именно к роторам электрических машин и может быть использована в электрических машинах с постоянными магнитами. Техническая задача - удержание балансировочного состава, улучшение прочностных характеристик ротора. Ротор электрической машины, содержащий вал 1, на котором установлено ярмо 2 с постоянными магнитами 3 и цельнометаллическая бандажная оболочка 4, которая выступает за внешние торцевые поверхности 5 ярма от 0,01 до 0,15 длины ярма. 1 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 182 085 U1 (51) МПК H02K 1/28 (2006.01) H02K 1/27 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК H02K 1/28 (2018.05); H02K 1/27 (2018.05) (21)(22) Заявка: 2018117599, 11.05.2018 (24) Дата начала отсчета срока действия патента: Дата регистрации: Приоритет(ы): (22) Дата подачи заявки: 11.05.2018 (56) Список документов, цитированных в отчете о поиске: RU 2552846 C1, 10.06.2015. RU (45) Опубликовано: 03.08.2018 Бюл. № 22 (54) РОТОР ЭЛЕКТРИЧЕСКОЙ МАШИНЫ С ПОСТОЯННЫМИ МАГНИТАМИ (57) Реферат: Полезная модель относится к области прочностных характеристик ротора. электротехники, а именно к роторам Ротор электрической машины, содержащий электрических машин и может быть использована вал 1, на котором установлено ярмо 2 с в электрических машинах с постоянными постоянными магнитами 3 и цельнометаллическая магнитами. бандажная оболочка 4, которая выступает за Техническая задача удержание внешние торцевые поверхности 5 ярма от 0,01 до балансировочного состава, улучшение 0,15 длины ярма. 1 ил. R U 1 8 2 0 8 5 2633959 C1, 20.10.2017. SU 427441 A1, 05.05.1974. SU 1039002 A1, 30.08.1983. US 4638200 A1, 20.01.1987. Стр.: 1 U 1 U 1 Адрес для переписки: 610006, г. Киров, Октябрьский пр-кт, 24, Акционерное общество "Электромашиностроительный завод "ЛЕПСЕ" 1 8 2 0 8 5 (73) Патентообладатель(и): Акционерное общество "Электромашиностроительный завод "ЛЕПСЕ" (RU) 03.08.2018 R U 11.05.2018 (72) ...

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Номер записи: 1
27-02-2020 дата публикации

Линейный синхронный генератор

Номер: RU0000196382U1
Автор: Анастасия Сергеевна Шишова, Андрей Ильич Тихонов, Дмитрий Сергеевич Корнилов, Игорь Альбертович Кашманов
Принадлежит: Общество с ограниченной ответственностью научно-технический центр "АРГО" (ООО НТЦ "АРГО")

Полезная модель относится к области электротехники, а именно к линейным генераторам электрической энергии, и предназначена для использования в качестве автономных источников энергии. Генератор имеет модульную конструкцию, каждый модуль состоит из П-образных шихтованных сердечников, охватывающих коаксиальную кольцевую катушку, и расположенных на стальном немагнитном валу кольцевых стальных массивных магнитных полюсов и высококоэрцитивных кольцевых постоянных магнитов с аксиальной намагниченностью, модули оснащены фигурными скобами и ориентируются друг относительно друга со смещением. Технический результат: повышение энергоэффективности, повышение удельной мощности линейного синхронного генератора. 3 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 196 382 U1 (51) МПК H02K 35/02 (2006.01) H02K 1/20 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК H02K 35/02 (2019.08); H02K 1/20 (2019.08) (21)(22) Заявка: 2019134534, 28.10.2019 (24) Дата начала отсчета срока действия патента: Дата регистрации: 27.02.2020 (45) Опубликовано: 27.02.2020 Бюл. № 6 1 9 6 3 8 2 R U (54) ЛИНЕЙНЫЙ СИНХРОННЫЙ ГЕНЕРАТОР (57) Реферат: Полезная модель относится к области электротехники, а именно к линейным генераторам электрической энергии, и предназначена для использования в качестве автономных источников энергии. Генератор имеет модульную конструкцию, каждый модуль состоит из П-образных шихтованных сердечников, охватывающих коаксиальную кольцевую катушку, и расположенных на стальном немагнитном валу кольцевых стальных Стр.: 1 (56) Список документов, цитированных в отчете о поиске: RU 83373 U1, 27.05.2009. RU 143160 U1, 20.07.2014. RU 182991 U1, 07.09.2018. EP 2347499 A1, 27.07.2011. DE 102014221935 A1, 28.04.2016. WO 2007112241 A2, 04.10.2007. массивных магнитных полюсов и высококоэрцитивных кольцевых постоянных магнитов с аксиальной намагниченностью, модули оснащены фигурными скобами и ориентируются друг относительно друга со смещением. ...

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Номер записи: 2
17-03-2022 дата публикации

Ротор электрической машины

Номер: RU0000209630U1
Автор: Антон Дмитриевич Шешин, Вячеслав Владимирович Ишутинов, Юрий Алексеевич Сысоев
Принадлежит: Акционерное общество "Электромашиностроительный завод "ЛЕПСЕ"

Полезная модель относится к области электротехники, в частности, к роторам электрических машин. Технический результат – повышение прочности посадки втулки на валу ротора и исключение ее радиального смещения в ходе работы электрической машины при изменении температуры эксплуатации машины от -60 до +180°С. Ротор электрической машины содержит вал 1 диаметром d, на котором установлена втулка 2 ротора длиной lя. При этом в ходе установки на длине втулки lпвыполнен натяг от 0,01 до 0,06 мм для прессовой посадки втулки ротора, а на оставшейся длине lк– зазор от 0,05 до 0,3 мм для посадки втулки ротора на клей 3. Величины lп, lяи d связаны соотношениями:гдеdmin- минимальный диаметр вала, равный 5 мм;d - диаметр вала от 5 до 20 мм. 1 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 209 630 U1 (51) МПК H02K 1/28 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК H02K 1/28 (2021.08) (21)(22) Заявка: 2021130079, 14.10.2021 (24) Дата начала отсчета срока действия патента: Дата регистрации: Приоритет(ы): (22) Дата подачи заявки: 14.10.2021 (56) Список документов, цитированных в отчете о поиске: RU 2583484 C1, 10.05.2016. RU 2505908 C1, 27.01.2014. RU 2597218 C2, 10.09.2016. RU 15433 U1, 10.10.2000. DE 3713610 C2, 05.04.1990. JP 11041845 A, 12.02.1999. (45) Опубликовано: 17.03.2022 Бюл. № 8 2 0 9 6 3 0 (54) РОТОР ЭЛЕКТРИЧЕСКОЙ МАШИНЫ (57) Реферат: Полезная модель относится к области электротехники, в частности, к роторам электрических машин. Технический результат – повышение прочности посадки втулки на валу ротора и исключение ее радиального смещения в ходе работы электрической машины при изменении температуры эксплуатации машины от -60 до +180°С. Ротор электрической машины содержит вал 1 диаметром d, на котором установлена втулка 2 ротора длиной lя. При этом в ходе установки на длине втулки lп выполнен R U натяг от 0,01 до 0,06 мм для прессовой посадки втулки ротора, а на оставшейся длине lк – зазор Стр.: 1 U 1 U 1 Адрес для ...

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Номер записи: 3
26-01-2012 дата публикации

Rotor and method of manufacturing the rotor

Номер: US20120019097A1
Автор: Hyuk Soo Kwon, Motoki Watanabe
Принадлежит: Toyota Motor Corp

A rotor of the invention includes a core made of laminated steel sheets and formed with a rotation-transmitting-member mounting end face (a wall surface of a through hole for shaft) extending over a lamination direction and a rotation transmitting member (a shaft) mounted to the rotation-transmitting-member mounting end face of the core. The core is formed with a welding end face (a wall surface of a through hole for welding) extending over the lamination direction and in a position adjacent to a rotation-transmitting-member mounting end face. A welded trace is formed in the welding end face, extending to the rotation transmitting member and over the lamination direction of the core. The invention can easily achieve size reduction and weight reduction of a rotary machine and manufacture a rotor in the reduced number of working processes.

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Номер записи: 4
02-02-2012 дата публикации

Fluid dynamic bearing motor including molded plastic

Номер: US20120027326A1
Автор: Alan L. Grantz, Klaus D. Kloeppel
Принадлежит: SEAGATE TECHNOLOGY LLC

A fluid dynamic bearing motor and method are described, wherein motor components, including complex shaped motor components, are molded of plastic. The molding ensures form control and dimensional control thereby accomplishing design requirements, and eliminating or reducing component costs and component machining. The mold can be shaped to form various motor geometries, thereby eliminating the need for multiple component assembly and related assembly costs. In an aspect, a plastic integral motor hub is formed by injection molding. Alternatively, a plastic motor hub is affixed to a metal sleeve. In another aspect, fluid containment structures are molded into the motor component, reducing the number of components as compared with machined metal components. In a further aspect, bearing structures such as grooves are molded into the motor component, thereby eliminating processes such as electrochemical machining. In yet a further aspect, a plastic hub faces a thrustplate, reducing expensive sleeve machining.

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Номер записи: 5
09-02-2012 дата публикации

Permanent Magnet Rotating Machine

Номер: US20120032539A1
Автор: Akiyoshi Komura, Daisuke Kori, Mamoru Kimura, Masahiro Hori, Nobuhiko Obata, Seikichi Masuda, Takayuki Koizumi
Принадлежит: HITACHI LTD

A permanent magnet rotating machine has a stator, in which armature windings are formed in a plurality of slots formed in a stator iron core, and also has a rotor, in which two magnet insertion slots are formed for each pole in a rotor iron core in a V shape when viewed from the outer circumference of the rotor and one permanent magnet is embedded in each magnet insertion slot with polarity alternating for each pole; a wall at one end of the magnet insertion slot on the external diameter side of the rotor is formed with three arcs having different curvatures, one of the three arcs being parallel to the outer circumference of the rotor, and a wall at the other end of the magnet insertion slot on the internal diameter side of the rotor is formed in an arc shape.

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Номер записи: 6
23-02-2012 дата публикации

Brushless motor

Номер: US20120042974A1
Автор: Lik Hon Chan, Mao Xiong Jiang, San Ruan Xao, Tao Zhang, Yue Li
Принадлежит: Johnson Electric SA

A brushless motor has a stator and a rotor rotatably installed inside of the stator. The stator includes a stator core with teeth protruding inwardly and windings wound on the teeth. The rotor includes a shaft, a rotor core fixed on the shaft, and a ring magnet fixed to the circumferential outer surface of the rotor core. The magnet includes a plurality of magnetic poles radially magnetized so that north poles and south poles are arranged alternately in the circumferential direction. Boundary lines between magnetic poles are skewed by an angle relative to an axis of the shaft.

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Номер записи: 7
01-03-2012 дата публикации

Rotary electric machine

Номер: US20120049686A1
Автор: Kosuke Mizuike
Принадлежит: Nidec Corp

A rotating portion of a rotary electric machine includes a shaft arranged to extend along a central axis, and a rotor core fixed to the shaft. The rotor core includes a through hole group including a plurality of through holes extending through the rotor core in an axial direction. The through hole group is arranged not to be symmetrical with respect to any imaginary plane including the central axis.

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Номер записи: 8
29-03-2012 дата публикации

Method for Applying Magnets

Номер: US20120073119A1
Автор: Stefan Böpple, Thomas Hannusch
Принадлежит: ThyssenKrupp Elevator AG

A method for applying at least one magnet, a holding device for such a method, and an arrangement comprising a number of holding devices. The method is used for applying at least one magnet to a surface of a part made of a magnetic material. The at least one magnet is moved towards the surface of the part while being retained in the holding device using a retaining force, and a force of attraction that acts against the retaining force is substantially directed towards the part and is applied to the at least one magnet such that the magnet is transferred to the surface of the part as soon as the magnet has been moved towards the surface of the part so as to be at a certain distance therefrom at which the force of attraction exceeds the retaining force.

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Номер записи: 9
29-03-2012 дата публикации

Rotor

Номер: US20120074805A1
Автор: Daijiro Takizawa
Принадлежит: Honda Motor Co Ltd

A rotor includes a hub, a rotor core, holes and permanent magnets. Salient poles are each formed between neighboring openings on a circumference of the rotor core and, when viewed from a front along a line of axis of the rotor, a recessed portion that is formed by causing one portion of an inner circumferential surface of the rotor core to bulge radially outward of another portion is provided in a region enclosed by a first virtual line connecting a center of the hub and a circumferential middle position on the circumference of a magnetic pole of the rotor core having permanent magnets provided therein and a second virtual line connecting the center of the hub and a circumferential middle position on the circumference of the salient pole adjacent to the magnetic pole at a leading side in a rotational direction of the rotor.

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Номер записи: 10
05-04-2012 дата публикации

Stator with cooling system and associated motor

Номер: US20120080983A1
Автор: Trevor Iund
Принадлежит: Caterpillar Inc

An electric motor is disclosed that includes a rotor having an axis and being rotatable about the axis. A stator is positioned about the rotor and includes a plurality of laminates with each laminate in the plurality of laminates including a peripheral edge defining a notch. The plurality of laminates includes a plurality of laminate subsets, with the laminates in each laminate subset arranged with the notches aligned to define a passage. The laminate subsets are arranged such that the passages defined by the laminate subsets form a substantially helical channel along the periphery of the stator.

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Номер записи: 11
12-04-2012 дата публикации

Electric machine

Номер: US20120086294A1
Автор: Andrei Mikhailovich MAXIMOV
Принадлежит: Individual

The device comprises a single circular row of permanent magnetic poles and a circular row of electromagnets, magnetic-force-conducting elements of which have central polar part and two lateral polar parts connected to the central polar part and spaced from opposing (in the direction which is essentially perpendicular to the rotation axis) sides of the central polar part. Winding is situated upon central polar part. The part of winding positioned between the polar parts of the magnetic-force-conducting element is more than half the length of the whole winding. Central polar part may have at least one groove. The distance between the centers of adjacent polar surfaces of the magnetic-force-conducting element is set depending on the angle between the magnetic poles in the circular row. The angular dimension of the polar surface of the lateral polar part depends on the angular dimension of the polar surface of the central polar part.

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Номер записи: 12
03-05-2012 дата публикации

Rotating electric machine

Номер: US20120104896A1
Автор: Alexander Schwery, Hanspeter Walser, Ricardo OKAI, Serdar Cifyildiz
Принадлежит: Alstom Hydro France SAS

A rotating electric machine includes a rotor configured to rotate about an axis. The rotor includes a rotor laminate stack having layered laminations pressed in an axial direction to form a composite, the rotor laminate stack being radially divided into an inner mechanical region and an outer electrical region. A rotor winding is disposed in the electrical region of the rotor laminate stack. A stator concentrically surrounds the rotor. A press plate is configured to press the layered laminations in the axial direction, the press plate being radially divided into a separate inner press plate and a separate outer press plate so as to correspond to the radial division of the rotor laminate stack.

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Номер записи: 13
24-05-2012 дата публикации

Permanent-magnet-less machine having an enclosed air gap

Номер: US20120126655A1
Автор: John S. Hsu
Принадлежит: UT Battelle LLC

A permanent magnet-less, brushless synchronous system includes a stator that generates a magnetic rotating field when sourced by an alternating current. An uncluttered rotor disposed within the magnetic rotating field is spaced apart from the stator to form an air gap relative to an axis of rotation. A stationary excitation core spaced apart from the uncluttered rotor by an axial air gap and a radial air gap substantially encloses the stationary excitation core. Some permanent magnet-less, brushless synchronous systems include stator core gaps to reduce axial flux flow. Some permanent magnet-less, brushless synchronous systems include an uncluttered rotor coupled to outer laminations. The quadrature-axis inductance may be increased in some synchronous systems. Some synchronous systems convert energy such as mechanical energy into electrical energy (e.g., a generator); other synchronous systems may convert any form of energy into mechanical energy (e.g., a motor).

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Номер записи: 14
31-05-2012 дата публикации

Dual-rotor motor having heat dissipation

Номер: US20120133221A1
Автор: Heinz Leiber, Thomas Leiber
Принадлежит: CPM COMPACT POWER MOTORS GMBH

An electric motor may include an outer rotor and an inner rotor, with a stator, which carries the excitation coils, formed as a hollow cylinder and engaging in the pot-shaped outer rotor and being connected to the housing or to a part of the electric motor fixedly connected to the housing, and where the electric motor may further include a water cooling and an air cooling system.

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Номер записи: 15
31-05-2012 дата публикации

Rotating electrical machine and method of manufacturing the rotating electrical machine

Номер: US20120133225A1
Автор: Kosuke Mizuike
Принадлежит: Nidec Corp

A method of manufacturing a rotating electrical machine includes: fixing a rotor core to a shaft; assembling a stationary assembly in which a first bearing is fixed to a housing bottom portion of a substantially cylindrical housing member having a closed bottom and in which an annular stator is fixed to an inner circumferential surface of a cylinder portion of the housing member; inserting the rotor core into the stator; fitting an upper portion of the shaft into a second bearing supported by a bearing support member. The method further includes fixing the bearing support member to an upper portion of the housing member; and axially inserting a plurality of rotor magnets into a plurality of axially-extending hole-shaped or groove-shaped magnet holding portions formed in the rotor core, through a magnet insertion hole defined in one of the bearing support member and the housing bottom portion.

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Номер записи: 16
19-07-2012 дата публикации

Electric motor

Номер: US20120181880A1
Автор: Jian Zhao, Mao Xiong Jiang, Xiao Ning Zhu, Ya Ming Zhang, Yue Li
Принадлежит: Johnson Electric SA

An electric motor has a wound stator and a permanent magnet rotor. The rotor includes a shaft, a hub fixed on the shaft, a plurality of rotor core segments and magnets fixed around the hub, and a pair of covers fixed to axial ends of the rotor core segments. The hub and covers are formed on the rotor core segments by inserting molding and one of the covers has openings to allow the magnets to be inserted into spaces formed between adjacent rotor core segments such that the rotor core segments and magnets are alternately arranged in a circumferential direction of the rotor.

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Номер записи: 17
19-07-2012 дата публикации

Electric motor rotor selectively formed of one of two different magnetic units

Номер: US20120181889A1
Автор: Wei-Chung Su
Принадлежит: Yen Shen Electric Ind Co Ltd

An electric motor rotor includes a core member having a plurality of locating grooves spaced around the periphery thereof and outer rotation-stopping portions, and a magnetic unit arranged around the periphery of the core member and defining a plurality of magnetic zones corresponding to the space between each two adjacent locating grooves. The magnetic unit can be a magnetic barrel having inner rotation-stopping portions for abutting against the outer rotation-stopping portions of the core member. Alternatively, the magnetic unit can be made comprising a plurality of magnets to form the multiple magnetic zones and a hoop for attaching to the magnets to secure the magnets to the periphery of the core member. Using the core member with the said two magnetic units can make two different rotors that have the common advantages of quick assembly, accurate alignment of magnetic zones and cost-effectiveness.

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Номер записи: 18
19-07-2012 дата публикации

Rotor for rotary electric machine

Номер: US20120181894A1
Автор: Takashi Asaga, Toshiya Sugiyama
Принадлежит: Aisin Seiki Co Ltd

A rotor for a rotary electric machine, the rotor being arranged to face a stator and being roratably attached to a housing, the rotor includes a core body formed by a plurality of core sheets laminated in a direction of a rotational axis of the rotor, first and second end plates arranged at both end surfaces of the core body in a direction where the core sheets are laminated, and a fixing member fixing the first and second end plates to the core body to hold the core body by the first and second end plates, wherein at least one of the first and second end plates is formed by a plurality of composition members overlapping in a thickness direction of the first end plate and the second end plate.

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Номер записи: 19
26-07-2012 дата публикации

Rotor

Номер: US20120187793A1
Автор: Joachim Mucha, Matthias Tutsch, Oliver Memminger, Ulrich Hartmann
Принадлежит: SIEMENS AG

The invention relates to a rotor ( 1 ) of a rotating dynamoelectric machine, comprising permanent magnets ( 3 ) which are arranged on the circumference of the rotor base ( 4 ), said permanent magnets ( 3 ) being positioned and secured by at least one collar ( 2 ) which is closed in circumferential direction.

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Номер записи: 20
02-08-2012 дата публикации

Permanent magnet, motor rotor or stator, rotary electric machine

Номер: US20120194025A1
Автор: Shingo Fubuki
Принадлежит: Toyota Motor Corp

A permanent magnet includes two or more separate permanent magnet pieces each having a rectangular parallelepiped shape with a fractured surface formed when a permanent magnet block is fractured. The separate permanent magnet pieces include a first separate permanent magnet piece and a second separate permanent magnet piece. At the time when the permanent magnet block is fractured, the first and second separate permanent magnet pieces are adjacently located and a first fractured surface of the first separate permanent magnet piece and a second fractured surface of the second separate permanent magnet piece are adjacent to each other. The permanent magnet is configured such that the first fractured surface of the first separate permanent magnet piece and the second fractured surface of the second separate permanent magnet piece are located in positions out of contact with each other.

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Номер записи: 21
16-08-2012 дата публикации

Self-contained & propelled magnetic alternator & wheel DirectDrive vertical units. aka:MAW-DirectDrives vertical model

Номер: US20120205997A1
Автор: Dana Allen Hansen
Принадлежит: Individual

MAW-DirectDrives Vertical Models are direct drive propulsion and electrical generating units for transportation vehicles utilizing wheels for motion, which connect onto the inside of wheels actuating rotation and braking electromagnetically while simultaneously utilizing the rotation to generate electricity to feed back into the supply for reducing the vehicle's requirement for operation. Two pancake style direct drive permanent magnets stators are mounted on sturdy metal mounting backs functioning as the unit's stationary outside faces and outer portion of the unit's wheel hub. The vehicle is supported from their rear face. The stators face one another with a two-sided permanent magnets drive-rotor disc between them accomplishing two functions simultaneously. The drive-rotor is connected to the Integrated Drive-plate Assembly's spindle perpendicular. The spindle with its threaded end traverses through each wheel hubs' bearings and unites the unit together with a lock nut. An attached exterior cylindrical housing keeps the unit rigid and parallel.

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Номер записи: 22
16-08-2012 дата публикации

Rotor core for rotating electrical machine, and manufacturing method thereof

Номер: US20120206007A1
Автор: Katsuhide Kitagawa, Makoto Yoshida, Masashi Matsumoto
Принадлежит: Toyota Motor Corp

A cylindrical rotor core 10 for a rotating electrical machine having magnetic steel plates integrally connected by laminating in an axial direction, and having magnet insertion holes 24, 26 formed for inserting permanent magnets inside, wherein the magnet insertion holes 24, 26 are formed extending in the axial direction in a core inner section in the vicinity of an outer peripheral surface 11 c of the rotor core 10, and with openings formed in axial direction end sections of the rotor core 10, and a plurality of magnetic steel plates, including magnetic steel plates at outermost sides in the axial direction in which the openings are formed, are fixed by welding at inner wall surfaces 42 of the magnet insertion holes 24, 26.

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Номер записи: 23
20-09-2012 дата публикации

Transverse and/or commutated flux systems having laminated and powdered metal portions

Номер: US20120235519A1
Автор: Daniel S. Cole, David G. Calley, John M. Dyer, Thomas F. Janecek, Tyler K. Williams
Принадлежит: MOTOR EXCELLENCE LLC

An electrical machine comprising a rotor, a coil and a stator comprising a lamination stack coupled to a tooth, wherein the electrical machine is at least one of a transversal flux machine is described. The electrical machine may be a transversal flux machine such as a transverse or commutated flux machine. A lamination ring is described comprising a plurality of lamination stacks. A lamination stack may comprise a plurality of trenches configured to retain a plurality of teeth. The tooth may comprise a portion of the switching surface, and a portion of a lamination stack may extend to the surface of the tooth to make up a portion of the switching surface. The electrical machine may be configured with a constant air gap, wherein no more than 15% variability in the distance between the stator switching surface and the rotor switching surface.

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Номер записи: 24
27-09-2012 дата публикации

Motor stator having channels used for cooling and method of providing the channels

Номер: US20120242176A1
Автор: Debabrata Pal
Принадлежит: Hamilton Sundstrand Corp

An example stator assembly includes a stator for establishing a core side of a channel. A plurality of stator windings are secured relative to portions of the stator core. The plurality of stator windings establish a winding side of the channel. At least a portion of the channel is configured to communicate a cooling fluid from a first axial end of the stator core to an opposing axial end of the stator core.

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Номер записи: 25
25-10-2012 дата публикации

Electrical Drive Motor for a Vehicle

Номер: US20120267977A1
Автор: Guenter Schlangen, Jens Halbedel, Joerg Merwerth
Принадлежит: Bayerische Motoren Werke AG

An electric drive motor that is intended for a vehicle, in particular for a motor vehicle, includes a stator and a rotor with at least one pole pair, wherein each pole of a respective pole pair has a magnet arrangement having at least one buried magnetic layer. The drive motor is characterized in that each pole has a number of magnetic flux influencing groups, each of which has a number of air-filled recesses, which are not assigned to a magnet of a respective magnetic layer for purposes of flux conductance.

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Номер записи: 26
22-11-2012 дата публикации

Rotor slot asymmetry in an electric motor

Номер: US20120293105A1
Автор: Edward L. Kaiser, Khwaja M. Rahman, Qiang NIU, Sinisa Jurkovic, Xinyu Zhou, Xu Han
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An electric motor includes a stator configured to receive electrical energy and generate an electromagnetic field in accordance with the electrical energy received. A rotor is in electromagnetic communication with the stator and is configured to rotate in accordance with the electromagnetic field generated by the stator. The rotor includes a plurality of poles including a first set of poles and a second set of poles. The first set of poles defines a first slot and the second set of poles defines a second slot that has a different configuration than the first slot to reduce a torque ripple effect. The electric motor may be used in a system having a power source configured to output direct current energy and an inverter configured to convert direct current energy to alternating current energy.

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Номер записи: 27
29-11-2012 дата публикации

Method and apparatus for cooling an electrical motor rotor

Номер: US20120299403A1
Автор: Jim M. Shoemaker, Ronnie D. Stahlhut
Принадлежит: Deere and Co

A vehicular device having a driven device and an electric motor coupled to and driving the driven device. The electric motor includes a rotor and a plurality of slots in the rotor. The rotor has a plurality of magnets. The plurality of slots includes a first slot associated with a corresponding one of the plurality of magnets thereby defining a first magnet. The first slot has a boundary that is partially defined by the first magnet. The first slot contains a fluid in direct contact with the first magnet.

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Номер записи: 28
29-11-2012 дата публикации

Rotor for rotating electric machine

Номер: US20120299404A1
Автор: Meio Gi, Satoshi Murakami, Yoichi Miyoshi, Yoshihisa Yamamoto, Yukinori Nakamori
Принадлежит: Aisin AW Co Ltd

In a rotor for the dynamo, the interior circumference face of a rotor core main body makes contact in a thermally transmissible manner with a rotor axle, and the rotor axle includes a cooling medium circulation space. The rotor is provided with a cooling medium supply member, which supplies the cooling medium to the cooling medium circulation space. The cooling medium supply member is provided with a cooling medium supply path that extends in the rotor axle direction, and cooling medium supply holes that extend externally in the direction of the rotor diameter. The cooling medium supply holes are provided with supply apertures that open toward the cooling interior circumference face. The rotor axle is provided with cooling medium discharge holes that extend externally in the direction of the rotor diameter. The cooling medium discharge holes are provided with discharge apertures that open externally in the diameter direction.

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Номер записи: 29
13-12-2012 дата публикации

Rotor of rotating electrical machine

Номер: US20120313476A1
Автор: tomokazu Hisada
Принадлежит: Denso Corp

When a corner part that is most distant from a perimeter surface of a rotor core is defined as a first corner part and a corner part in a position that faces the first corner part in a magnetization direction of a permanent magnet is defined as a second corner part, a gap is formed between the second corner part and an inner circumference side of a slot, and the inner circumference side of the slot that forms the gap has an arc surface that has a point X as a center on the inner circumference side of the slot that faces the first corner part. Therefore, the demagnetizing field by the magnetic flux from the stator side does not act intensively on the second corner part of the permanent magnet, and the demagnetizing field instead affects in a wide range of the permanent magnet equally.

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Номер записи: 30
03-01-2013 дата публикации

Rotor or a stator for a superconducting electrical machine

Номер: US20130002083A1
Автор: Graham Derek LeFLEM, JOSEPH Eugene
Принадлежит: GE Energy Power Conversion Technology Ltd

A rotor (or a stator) for a superconducting electrical machine includes a mounting that is maintained at substantially ambient temperature during operation of the electrical machine and a field coil support structure. A plurality of superconducting field coils are maintained at cryogenic temperatures during operation of the electrical machine and are supported by the field coil support structure. A plurality of coupling elements are used to fix the field coil support structure to the mounting. The coupling elements can be linear struts and carry substantially of the torque that is experienced during operation of the electrical machine.

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Номер записи: 31
10-01-2013 дата публикации

Motor and method of manufacturing motor

Номер: US20130009494A1
Автор: Yoshiaki Oguma
Принадлежит: Nidec Corp

A rotating portion of a motor includes a rotor holder including a cylindrical portion arranged to be coaxial or substantially coaxial with a central axis, a plurality of magnets arranged in a circumferential direction on an inner circumferential surface of the cylindrical portion, and a resin portion arranged on a surface of the rotor holder. The resin portion includes a plurality of ribs arranged at regular or substantially regular intervals in the circumferential direction along the inner circumferential surface of the cylindrical portion, and an outer tubular portion arranged to cover an outer circumferential surface of the cylindrical portion. Each rib and the outer tubular portion are arranged to be defined by a single monolithic member such that each rib and the outer tubular portion are continuous with each other. Each magnet is preferably arranged between a separate pair of adjacent ones of the ribs.

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Номер записи: 32
24-01-2013 дата публикации

Rotor for a permanent magnet electric machine

Номер: US20130020896A1
Автор: John C. Morgante, Khwaja M. Rahman, Qiang NIU, Sinisa Jurkovic, Xinyu Zhou, Xu Han
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A rotor for a permanent magnet electric machine includes an axis of rotation, an outer surface, and a cross-section orthogonal to the axis of rotation with a non-circular contour of the outer surface defined by a plurality of radii angularly distributed around the axis of rotation.

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Номер записи: 33
24-01-2013 дата публикации

Rotor Core For Motor

Номер: US20130020898A1
Автор: Hyunseop Kim, Woongseon Ryu
Принадлежит: LG Innotek Co Ltd

Provided is a rotor core of a motor, the rotor core, the rotor core including: a thin disk-shaped rotor core member; a shaft hole penetratively formed in a center of the rotor core member; a shaft press-fitted into the shaft hole; a plurality of magnet insertion holes penetratively formed at a position near to a periphery of the rotor core member for inserted coupling by a magnet; a plurality of teeth protrusively formed at an inner circumferential surface of the shaft hole, and a skived portion protrusively formed at a position corresponding to the plurality of teeth of the shaft, wherein the rotor core members are stacked each at a predetermined height, and the shaft is press-fitted into the shaft hole.

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Номер записи: 34
31-01-2013 дата публикации

Linear motor

Номер: US20130026859A1
Автор: Chang Hwan Choi, Changsung Sean KIM, Guen Hong Lee, Han Kyung Bae
Принадлежит: Samsung Electro Mechanics Co Ltd

Disclosed herein is a linear motor including: a first stator part including a plurality of stator cores having coils wound therearound multiple times and arranged to be spaced apart from each other by predetermined intervals in a longitudinal direction; a second stator part arranged to be spaced apart from the first stator part by a predetermined interval in a transversal direction so as to face the first stator part and including a plurality of stator cores having coils wound therearound multiple times and arranged to be spaced apart from each other by predetermined intervals in the longitudinal direction so that the second stator part is in parallel with the first stator part; and a mover arranged in an interval formed by the first and second stator parts and moving linearly.

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Номер записи: 35
07-02-2013 дата публикации

Spindle motor

Номер: US20130033137A1
Автор: Chang Jo Yu
Принадлежит: Samsung Electro Mechanics Co Ltd

A spindle motor including: a lower thrust member fixedly coupled to a base member; a shaft fixedly coupled to at least one of the lower thrust member and the base member; a sleeve disposed on an upper portion of the lower thrust member and rotatably installed on the shaft; a rotor hub coupled to the sleeve to thereby rotate together with the sleeve; an upper thrust member fixedly coupled to an upper end portion of the shaft and forming a liquid-vapor interface together with the sleeve; and a cover member fixedly coupled to the shaft so as to be disposed on an upper portion of the upper thrust member, wherein the upper thrust member includes a stepped jaw part having a lower surface supported by an upper surface of the shaft and an upper surface pressed by the cover member, so as to increase coupling strength with the shaft.

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Номер записи: 36
14-02-2013 дата публикации

Method for assembling part of a generator, generator and wind turbine

Номер: US20130038070A1
Автор: Kurt Andersen
Принадлежит: SIEMENS AG

A method for assembling part of a generator is disclosed. A magnet assembly with at least one magnet and a mounting plate is fastened to a base element by welding the mounting plate to the base element.

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Номер записи: 37
21-02-2013 дата публикации

Interior permanent magnet motor

Номер: US20130043757A1
Автор: Masanao Kagami, Noriyuki Suzuki, Ryo Umeyama, Satoru Mitsuda, Yoshiyuki Nakane
Принадлежит: Toyota Industries Corp

An interior permanent magnet motor includes a rotor and a stator. The rotor includes a rotor core. The rotor core is formed by laminating steel plates each including pairs of magnet insertion holes and pairs of cutouts. Each pair of magnet insertion holes includes two magnet insertion holes that are arranged in a V-shape, the wide end of which is relatively closer to the outer edge with a support portion located in between. Each pair of cutouts is formed at q-axis ends of the corresponding magnet insertion holes, and includes two cutouts connected to the outer edge of the rotor core. In a state where the permanent magnets are inserted in the magnet insertion holes, a gap is formed at a d-axis end of each magnet insertion hole.

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Номер записи: 38
14-03-2013 дата публикации

ROTATING ELECTRIC MACHINE

Номер: US20130062991A1
Автор: Okai Ricardo Naoki
Принадлежит: Alstom Hydro France

A rotating electrical machine is presented and includes a rotor, rotatable about an axis and is surrounded concentrically by a stator and has a hollow cylindrical rotor laminated core, which includes a layered lamination stack made up of a multiplicity of ring-section-shaped lamination segments which are acted upon by a pressing plate in order to distribute the pressure and are clamped by bolts which pass in an axial direction through the rotor laminated core, and which engages with a concentric central body of the rotor by means of axial slots on the internal radius of the rotor laminated core in order to transmit torque. The machine also includes slots formed in each case by pairs of radially inwardly aligned cams which are arranged on the internal radius of the lamination segments and are separated from one another by the width of the slot. 1. A rotating electrical machine comprising a rotor , rotatable about an axis and is surrounded concentrically by a stator and has a hollow cylindrical rotor laminated core , which comprises a layered lamination stack which is comprised of a plurality of ring-section-shaped lamination segments which are equipped with teeth on an outer edge thereof for accommodating a rotor winding and which are clamped by bolts which pass in an axial direction through the rotor laminated core and a pressing plate , and which engages with a concentric central body of the rotor by axial slots on an internal radius of the rotor laminated core in order to transmit torque , the slots are each formed by pairs of radially inwardly aligned cams which are arranged on the internal radius of the lamination segments and are separated from one another by a width of the slot.2. The rotating electrical machine as claimed in claim 1 , wherein a radial height of the cams is equal to a slot depth of the slots.3. The rotating electrical machine as claimed in claim 1 , wherein surfaces of respectively adjacent cams which face the slots are aligned at least ...

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Номер записи: 39
21-03-2013 дата публикации

Spindle motor and method for manufacturing the same

Номер: US20130069464A1
Автор: Sang Jin Park, Won Ki Park
Принадлежит: Samsung Electro Mechanics Co Ltd

Disclosed herein is a spindle motor including: a rotor including a shaft, a hub, and a magnet; a stator including a sleeve rotatably supporting the shaft, a base having the sleeve coupled thereto, and an armature facing the magnet and including a core and a coil; and a fluid dynamic bearing part formed between the rotor and the stator by being filled with oil, wherein the armature is coupled to an outer peripheral portion of the sleeve.

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Номер записи: 40
21-03-2013 дата публикации

Permanent magnet rotor

Номер: US20130069468A1
Автор: Hirohisa Yokota, Masashi Nakamura, Masaya Inoue, Shogo Okamoto
Принадлежит: Mitsubishi Electric Corp

A permanent magnet rotor includes: a rotor core of a laminated structure about a rotation shaft; a plurality of permanent magnet embedment slots provided to the rotor core at equally spaced positions from the rotation shaft; and permanent magnets inserted into the respective permanent magnet embedment slots. The permanent magnet embedment slots each have a magnet storing portion and a buffer and other members storing portion continuing to the magnet storing portion. One permanent magnet is stored in the magnet storing portion and a buffer member and a pushing member used to fix the permanent magnet are stored in the buffer and other members storing portion. It thus becomes possible to provide a permanent magnet rotor capable of not only preventing damage on a permanent magnet by reducing resonance even when the magnet resonates under a vibration condition, but also enhancing mass-productivity.

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Номер записи: 41
21-03-2013 дата публикации

Rotor of motor, method of producing the rotor, inner rotor-type brushless motor and method of producing the motor

Номер: US20130069469A1
Автор: Keisuke Wakabayashi, Masayuki Kodani, Nobuyuki Kabasawa, Yasuaki Motegi
Принадлежит: Shinano Kenshi Co Ltd, Yamada Manufacturing Co Ltd

The rotor of the present invention is capable of improving magnetic characteristics, general versatility and ease of assembly. The rotor comprises: a rotor shaft; a ring-shaped rotor magnet being disposed coaxially with the rotor shaft; and a non-magnetic cover covering an outer circumference of the rotor magnet. The rotor magnet and the cover are integral-molded with molding resin in a state where an outer circumference of the cover is exposed and both end parts and an inner circumference of the rotor magnet are covered with the molding resin.

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Номер записи: 42
28-03-2013 дата публикации

Laminated core and fabrication method thereof

Номер: US20130076193A1
Автор: Chang Hwan Choi, Changsung Sean KIM, Guen Hong Lee, Han Kyung Bae, Ji Hye Shim
Принадлежит: Samsung Electro Mechanics Co Ltd

Disclosed herein is a laminated core used for a motor including an electric motor, wherein the core is formed of a soft magnetic composite and has a structure in which one or more unit laminates are laminated. Since the core is fabricated by laminating soft magnetic composites, the mechanical strength of the core formed of the soft magnetic composites can be improved.

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Номер записи: 43
28-03-2013 дата публикации

BEARING APPARATUS, SPINDLE MOTOR, AND DISK DRIVE APPARATUS

Номер: US20130077190A1
Автор: HIRONO Teiichi, HORISE Kyoko, KIMURA Akihiro, SAKURADA Kunio
Принадлежит: NIDEC CORPORATION

A bearing apparatus includes stationary and rotating portions. The stationary portion includes a stationary shaft and a first cup portion. The rotating portion includes an annular recessed portion and first and second inner circumferential surfaces. Lubricating oil is arranged in a gap between the stationary and rotating portions. An upper surface of the lubricating oil is located between the second inner circumferential surface and an outer circumferential surface of the first cup portion. A lower surface of the lubricating oil is located between the rotating and stationary portions. The rotating portion further includes a through hole filled with the lubricating oil. One of the first cup portion and the rotating portion includes a pumping groove array arranged thereon to cause the lubricating oil to flow toward one end of the through hole during rotation of the rotating portion. 1. A bearing apparatus comprising: a stationary shaft arranged along a center axis extending in a vertical direction;', 'a circular plate portion extending radially outward from the stationary shaft; and', 'a cylindrical portion projecting downward from an outer edge portion of the circular plate portion;, 'a stationary portion includinga rotating portion arranged to rotate about the stationary shaft; anda lubricating oil; whereinthe circular plate portion and the cylindrical portion together define a first cup portion; a first upper surface arranged opposite to a lower surface of the circular plate portion;', 'an annular recessed portion arranged to accommodate at least a lower end portion of the cylindrical portion;', 'a first inner circumferential surface arranged opposite to an outer circumferential surface of the stationary shaft; and', 'a second inner circumferential surface arranged opposite to an outer circumferential surface of the first cup portion;, 'the rotating portion includesthe lubricating oil is arranged in a gap between the stationary and rotating portions;at least one of ...

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Номер записи: 44
04-04-2013 дата публикации

Assembly for positioning a rotor retaining ring

Номер: US20130081260A1
Автор: Cecil James Pollock, Jeremy Daniel Van Dam, Ken Ivcar Salas Nobrega, Ronald George Shillington
Принадлежит: General Electric Co

An assembly for positioning a retaining ring includes a mandrel having an outer diameter smaller than an outer diameter of a rotor. The assembly also includes a seal assembly for sealing a circumferential retaining ring around the mandrel or the rotor, the seal assembly comprising a pair of seal plates situated around opposing ends of the retaining ring. Further, the assembly includes a hydraulic expansion device for providing a fluid pressure for hydraulically expanding the retaining ring until an inner diameter of the retaining ring is greater than the outer diameter of the rotor. Furthermore, the assembly includes a displacement device for providing axial movement of the seal assembly and the retaining ring.

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Номер записи: 45
04-04-2013 дата публикации

Spindle motor

Номер: US20130082555A1
Автор: Duck Young Kim
Принадлежит: Samsung Electro Mechanics Co Ltd

Disclosed herein is a spindle motor in which oil sealing parts are surface-treated stepwise with respect to oil used as a fluid dynamic bearing, such that sealing of the oil sealing part is enhanced, thereby preventing scattering, or the like, of the oil. According to preferred embodiments of the present invention, oil contact surfaces are surface-treated stepwise in the direction from the inner side of the oil interface formed in the oil sealing part of a fluid dynamic bearing part toward the outer side thereof, thereby making it possible to enhance maintenance of the oil interface.

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Номер записи: 46
04-04-2013 дата публикации

DIRECT DRIVE ROTOR WITH METAL COUPLER

Номер: US20130082579A1
Автор: Bailey Daniel E., Hilton Daniel H., Johnson Philip S., Levine Gregory M.
Принадлежит: NIDEC MOTOR CORPORATION

A rotor for an outer rotor-type motor is provided. The rotor includes a metallic coupler and a polymeric frame molded over at least part of the metallic coupler. 1. A rotor for an outer rotor-type electric motor , the rotor comprising: an inner axial surface configured to interface with a shaft to be driven by the rotor when the motor is energized; and', 'an outer axial surface that corresponds to a multiplicity of outer teeth;, 'a metallic coupler that comprises a hub molded over at least the outer axial surface of the metallic coupler;', 'a base that is integrally formed with the hub and extending radially outward therefrom; and', 'a sidewall that is integrally formed with the base;, 'a polymeric frame that comprisesa multiplicity of magnet spacers; anda multiplicity of permanent magnets molded over by the polymeric frame and spaced apart by the magnet spacers.2. The rotor of claim 1 , wherein the outer teeth are selected from the group consisting of knurls claim 1 , splines claim 1 , keys claim 1 , diamond knurls claim 1 , or combinations thereof.3. The rotor of claim 1 , wherein the outer teeth are knurls.4. The rotor of claim 1 , wherein the number of outer teeth is at least 10.5. The rotor of claim 1 , wherein the number of outer teeth is at least 20 and no more than about 40.6. The rotor of claim 1 , wherein the inner axial surface of the metallic coupler corresponds to a multiplicity of inner teeth.7. The rotor of claim 6 , wherein the inner teeth are selected from the group consisting of knurls claim 6 , splines claim 6 , keys claim 6 , or combinations thereof.8. The rotor of claim 6 , wherein the inner teeth are splines.9. The rotor of claim 1 , wherein the metallic coupler further comprises one or more annular shoulders radially inward of claim 1 , and axially outward of each axial end of the outer axial surface and wherein the hub is additionally molded over at least one of said annular shoulders such that it is generally flush with an axially outermost ...

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Номер записи: 47
11-04-2013 дата публикации

Multispindle lathe

Номер: US20130087027A1
Автор: Karl-Heinz Schumacher
Принадлежит: Index Werke GmbH and Co KG Hahn and Tessky

Multispindle lathe comprising a machine frame ( 12 ), a spindle drum ( 14 ) which is arranged in the machine frame ( 12 ), is rotatable about a spindle drum axis ( 16 ) and is made up at least partially of segments ( 80 ) which are cut out from flat material in a stacking direction ( 82 ) parallel to the spindle drum axis ( 16 ) and extend in stacking planes ( 88 ) transverse to the stacking direction ( 82 ), these segments having receiving cutouts ( 90 ) and cooling channel cutouts ( 92, 96, 106 ) which overlap with one another such that the spindle drum ( 14 ) has spindle motor receptacles ( 30 ) for spindle motors ( 32 ) and a cooling channel system ( 120, 130, 180 ) separated therefrom by wall webs ( 98 ), characterized in that the cooling channel system has several channel subsystems ( 120, 130, 180 ) for a liquid cooling medium which are fed in parallel.

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Номер записи: 48
11-04-2013 дата публикации

Motor having more magnets on effective area of the rotor thereof

Номер: US20130088113A1
Автор: Chen-Nan Chu, Fu-Rong Chen, Wei-Hsun Lee, Wen-Ho Yu
Принадлежит: Rechi Precision Co Ltd

A motor having more magnets on effective area of the rotor includes a stator, a rotor and a rotation shaft, the rotor has a plurality number of rotor magnetic poles, a magnet is installed inside each of rotor magnetic pole, and a concave arc is on the outer side of each magnet and forms the first, the second and the third surfaces near inside of each magnet. The concave arc connects to the first and the third surfaces with a connecting plan respectively, each connecting plan nears the periphery surface of the rotor. The motor has more magnets on the effective area of the rotor for higher motor efficiency.

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Номер записи: 49
18-04-2013 дата публикации

ROTOR FOR A MOTOR, AND A MOTOR AND AN APPLIANCE COMPRISING THE ROTOR, AND A METHOD FOR MAKING A ROTOR

Номер: US20130091902A1
Автор: Hill Gregory Paul, Jackson Russell Joseph
Принадлежит: FISHER & PAYKEL APPLIANCES LIMITED

A rotor for a motor comprising a frame having a hub for connecting the rotor to a shaft and a perimeter portion for interacting with a stator of the motor to cause the rotor to rotate about an axis of rotation. The frame comprises legs extending from an outer portion of the frame towards the hub, each leg having an inner end at the hub and an outer end at the outer portion of the frame, the inner ends of a first plurality of legs being spaced from the inner ends of a second plurality of legs in a direction along the axis of rotation. 1. A rotor for a motor comprising a hub for connecting the rotor to a shaft , a perimeter portion for interacting with a stator of the motor to cause the rotor to rotate about an axis of rotation , and a frame between the hub and the perimeter portion , whereinthe frame comprises legs extending from the hub outwards towards the perimeter portion, each leg having an inner end at the hub, the inner ends of a first plurality of legs being axially spaced from the inner ends of a second plurality of legs.2. A rotor as claimed in wherein the frame is metal and the first plurality of legs or the second plurality of legs or both are bent from the frame to axially space the inner ends of the first plurality of legs from the inner ends of the second plurality of legs.3. A rotor as claimed in wherein the hub comprises a reinforcing member for coupling the rotor to the shaft and over-moulded plastic material to couple the inner end of each leg to the reinforcing member.4. A rotor as claimed in wherein the first plurality of legs and the second plurality of legs are interleaved claim 1 , a leg from the first plurality of legs being adjacent to and between two legs from the second plurality of legs.5. A rotor as claimed in wherein the frame comprises an annular outer portion between an outer end of the legs and the perimeter portion of the rotor claim 1 , the legs extending between the hub and the annular outer portion.6. A rotor as claimed in ...

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Номер записи: 50
18-04-2013 дата публикации

Rotational kinetic energy output device

Номер: US20130093278A1
Автор: Chau-Shin Jang, Jung-Kang Peng, Wen-Yang Peng
Принадлежит: Industrial Technology Research Institute ITRI

A rotational kinetic energy output device comprises a housing component, a rotational component and a magnetism generating component. The rotational component includes a rotational body pivotally connected to the housing component, and the rotational body has at least one magnetic element. The magnetism generating component includes a plurality of magnetizers and coils wound on the magnetizers, the magnetizers are disposed in the housing component and surround the rotational body. Each of the magnetizers has a first magnetic arm and a second magnetic arm extended respectively toward the rotational body, and the rotational body is disposed between the first magnetic arm and the second magnetic arm. Thereby, the rotational kinetic energy output device allows a force to be balancedly exerted on the rotational body and a thin shape is also achieved.

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Номер записи: 51
18-04-2013 дата публикации

ROTOR OF ELECTRIC ROTATING MACHINE

Номер: US20130093284A1
Автор: Utaka Ryosuke
Принадлежит: Denso Corporation

The waveform of a magnetomotive force generated by a rotor is comprised of a plurality of sections that respectively correspond to a plurality of magnetic poles of the rotor. When viewed along the axial direction of a rotor core, each of the sections of the waveform includes two oblique lines and a connection line. Each of the oblique lines extends from a 0 reference line, which is defined by an outer peripheral surface of the rotor core, obliquely with respect to a radial direction of the rotor core. The connection line connects the two oblique lines in the circumferential direction of the rotor core. Moreover, representing the circumferential width of the connection line by 2π·Duty, the circumferential width of the oblique lines by 2π·Slope, the radial height of the oblique lines by B, the order of a harmonic component of the magnetomotive force by n, and the amplitude of the nth harmonic component by Amp, then the following relationship is satisfied: Slope=k/n (here, k is an arbitrary natural number). The amplitude of the nth harmonic component is determined by: Amp(n)=(4B/nπ)×{sin (nπ·Slope)/nπ·Slope}×sin {nπ(Duty+Slope)} . . . Equation (1). 3. The rotor of the electric rotating machine as set forth in claim 1 , wherein the rotor core is comprised of a plurality of segments that respectively correspond to the magnetic poles claim 1 , andin an outer peripheral surface of each segment of the rotor core, there are provided either a plurality of grooves that are recessed radially inward and extend in an axial direction of rotation or a plurality of protrusions that protrude radially outward and extend in the axial direction of rotation.4. The rotor of the electric rotating machine as set forth in claim 3 , wherein in each segment of the rotor core claim 3 , the grooves or the protrusions are provided within a circumferential range where the permanent magnets exist claim 3 , and arranged at such positions that when viewed along the axial direction of the rotor core ...

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Номер записи: 52
02-05-2013 дата публикации

ROTOR AND MOTOR

Номер: US20130106208A1
Автор: MORITA Chie, YAMADA Yoji, Yokoyama Seiya
Принадлежит: ASMO CO., LTD.

A rotor includes at least one of a group of one or more auxiliary magnets that are located between first and second claw poles in a circumferential direction and magnetized to be magnetic poles of the same polarity as the first and second claw poles and another group of one or more auxiliary magnets that are located on a rear side of the first and second claw poles and magnetized to have radially outer portions of the same polarity as the first and second magnetic poles. The auxiliary magnets are arranged to protrude beyond at least one of axial end surfaces of the first and second core bases. 1. A rotor comprising:a first rotor core having a substantially disk-like first core base and a plurality of first claw poles located at equal intervals around an outer circumference of the first core base, the first claw poles projecting radially outward and extending in an axial direction;a second rotor core having a substantially disk-like second core base and a plurality of second claw poles located at equal intervals around an outer circumference of the second core base, the second claw poles projecting radially outward and extending in the axial direction, wherein the second claw poles are each located between corresponding ones of the first claw poles of the first rotor core;a field magnet placed between the first core base and the second core base in the axial direction, the field magnet being magnetized in the axial direction so that the first claw poles function as first magnetic poles and the second claw poles function as second magnetic poles; andat least one of a group of one or more auxiliary magnets that are each located between first and second claw poles in a circumferential direction and magnetized to be magnetic poles of the same polarity as the first and second claw poles and another group of one or more auxiliary magnets that are each located on a rear side of the first and second claw poles and magnetized to have radially outer portions of the same ...

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Номер записи: 53
09-05-2013 дата публикации

Electromagnetic module and spindle motor having the same

Номер: US20130113322A1
Автор: Nam Ki Park, Sang Jae Song
Принадлежит: Samsung Electro Mechanics Co Ltd

Disclosed herein are an electromagnetic module for a spindle motor including a shaft and a spindle motor having the same. The electromagnetic module includes: an armature including a core and a coil wound around the core; and a magnet facing the armature, wherein the magnet is provided with a protrusion part disposed over the core. The spindle motor includes: a rotor part including a shaft, a hub, and a magnet; a stator part including a sleeve rotatably supporting the shaft, a base having the sleeve coupled thereto, and an armature facing the magnet, fixedly coupled to the base, and including a core and a coil; and a fluid dynamic bearing part formed between the rotor part and the stator part by being filled with oil, wherein the magnet is provided with a protrusion part disposed over the core.

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Номер записи: 54
09-05-2013 дата публикации

TAPERED ROTOR ASSEMBLY

Номер: US20130113324A1
Автор: Picard Johannes Wilhelm, Shepard Charles
Принадлежит: HAMILTON SUNDSTRAND CORPORATION

A rotor assembly for an electric machine includes an outer sleeve and a plurality of permanent magnets disposed in the outer sleeve. An inner sleeve is located inboard of the plurality of permanent magnets and includes a plurality of inner sleeve segments that form a tapered inner sleeve surface. A rotor shaft is located inboard of the inner sleeve and has a tapered outer shaft surface engageable with the tapered inner sleeve surface in an interference fit to force the plurality of inner sleeve segments into engagement with the plurality of permanent magnets. 1. A rotor assembly for an electric machine comprising:an outer sleeve;a plurality of permanent magnets disposed in the outer sleeve;an inner sleeve disposed inboard of the plurality of permanent magnets including a plurality of inner sleeve segments that form a tapered inner sleeve surface; anda rotor shaft disposed inboard of the inner sleeve having a tapered outer shaft surface engageable with the tapered inner sleeve surface in an interference fit to force the plurality of inner sleeve segments into engagement with the plurality of permanent magnets.2. The rotor assembly of claim 1 , wherein the outer shaft surface is tapered at less than about 1 degree claim 1 , along an axial length of the rotor shaft.3. The rotor assembly of claim 1 , further comprising a friction-reducing coating on the inner sleeve.410. The rotor assembly of claim 1 , wherein the plurality of inner sleeve segments comprises or more inner sleeve segments.5. The rotor assembly of claim 4 , wherein the plurality of inner sleeve segments comprises between about 10 and about 20 inner sleeve segments.6. The rotor assembly of claim 1 , wherein the plurality of permanent magnets comprises 20 or more permanent magnets.7. The rotor assembly of claim 6 , wherein the plurality of permanent magnets comprises between about 20 and about 40 permanent magnets.8. The rotor assembly of claim 1 , wherein the plurality of inner sleeve segments are arranged ...

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Номер записи: 55
09-05-2013 дата публикации

Rotor core, rotor, and rotating electric machine

Номер: US20130113326A1
Автор: Daisuke Morishita, Yuki OCHIAI
Принадлежит: Yaskawa Electric Corp

A rotor core according to an embodiment has a plurality of magnet openings and cavity portions. The magnet openings are in juxtaposition with each other in a circumferential direction. Permanent magnets are inserted in the magnet openings. The cavity portions are each formed relative to an area sandwiched between two magnet openings, out of the magnet openings, in which the permanent magnets that are mutually adjacent and that have magnetic pole directions relative to a radial direction opposite to each other are inserted.

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Номер записи: 56
16-05-2013 дата публикации

ELECTRIC MOTOR

Номер: US20130119790A1
Автор: CHU Jun Jie, Gan Jin Yan, HE Wan Mei, ZHOU Chui You
Принадлежит: JOHNSON ELECTRIC S.A.

An electric motor has a wound stator and a permanent magnet rotor. The rotor has a plurality of rotor core portions and a plurality of permanent magnets, the rotor core portions and the permanent magnets being arranged alternately in a circumferential direction of the rotor. The permanent magnets are made of material containing ferric oxide and polarized generally in the circumferential direction of the rotor. The motor may be used in a power tool or a lawn mower. 1. A permanent magnet motor comprising a stator and a rotor mounted inside the stator , the stator comprising a stator core and stator windings wound on the stator core ,wherein the rotor comprises a plurality of rotor core portions and a plurality of permanent magnets, the rotor core portions and the permanent magnets being arranged alternately in a circumferential direction of the rotor; andthe permanent magnets are made of material containing ferric oxide and polarized approximately in the circumferential direction of the rotor.2. The permanent magnet motor of claim 1 , wherein the transverse cross section of the permanent magnet is in trapezoid shape claim 1 , the shorter edge of the trapezoid being closer to the center of the rotor.3. The permanent magnet motor of claim 1 , wherein the rotor comprises a shaft and a shaft sleeve fixed to the shaft;the plurality of rotor core portions are separated from each other, the radially inner end of each rotor core portion being fixed to the shaft sleeve; andeach permanent magnet is fixed between two adjacent rotor core portions.4. The permanent magnet motor of claim 3 , wherein a plurality of dovetail slots are formed in a radially outer surface of the shaft sleeve;the radially inner end of each rotor core portion is locked in a corresponding dovetail slot.5. The permanent magnet motor of claim 4 , wherein a plurality of locating surfaces are formed on the radially outer surface of the shaft sleeve;each locating surface touches a radially inner end of the ...

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Номер записи: 57
16-05-2013 дата публикации

ELECTRIC POWER TOOL

Номер: US20130119791A1
Автор: MATSUMOTO Hiroshi, SAKAE Junji, TAKEYAMA Atusi, TUJIMURA Manabu, WATANABE Masayoshi, YOSHIMOTO Kanji
Принадлежит: Panasonic Corporation

An electric power tool includes a main body provided with a drive unit and a power supply pack detachably attached to the main body and provided with a power supply unit serving as a power source for the drive unit. A first power supply pack in which a secondary battery is used as the power supply unit and a second power supply pack in which an electric double-layer capacitor is used as the power supply unit are selectively used as the power supply pack to be attached to the main body. 1. An electric power tool comprising:a main body provided with a drive unit; anda power supply pack detachably attached to the main body and provided with a power supply unit serving as a power source for the drive unit,wherein a first power supply pack in which a secondary battery is used as the power supply unit and a second power supply pack in which an electric double-layer capacitor is used as the power supply unit are selectively used as the power supply pack attached to the main body.2. The electric power tool of claim 1 , wherein the second power supply pack includes a charging route to which the first power supply pack is connected claim 1 , the charging route serving to charge the electric double-layer capacitor with electric power of the first power supply pack. The present invention relates to an electric power tool provided with a detachable power source.As examples of an electric power tool such as an impact tool or drilling tool, there are conventionally available an external power supply type tool, which is provided with a power supply cord connected to an external power source such as a commercial power source when it is in use, and a battery pack type tool provided with a detachable battery pack as a power source.The external power supply type tool makes use of an external power source such as a commercial power source or the like and therefore can be operated with a higher output power as compared with a case where a secondary battery is used. However, the external ...

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Номер записи: 58
16-05-2013 дата публикации

ELECTRICAL POWER TOOLS

Номер: US20130119792A1
Автор: MATSUNAGA Yutaka, NISHIMIYA Takeshi
Принадлежит: MAKITA CORPORATION

An electrical power tool may include a switching device capable of controlling output power of a motor, a circuit board supporting the switching device, and a metal case receiving the circuit board. The switching device includes a conductive part and an insulated portion that is covered by an insulating covering material. The conductive part of the switching device contacts the circuit board. The insulated portion of the switching device contacts the metal case via the insulating covering material. 1. An electrical power tool , comprising:a motor housing;a motor received in the motor housing;a grip housing connected to the motor housing;a switch lever attached to one side of the grip housing;a battery to feed electrical power to the motor;a circuit board disposed in the other side of the grip housing;a switching device attached to the circuit board; anda heat dissipating portion configured to dissipate heat generated by the switching device.2. The electrical power tool as defined in claim 1 , wherein the circuit board is positioned on an enlarged portion formed in a lower portion of the grip housing.3. The electrical power tool as defined in claim 1 , wherein the switching device is positioned on one surface of the circuit board which surface faces one side of the grip housing claim 1 , and wherein the heat dissipating member is positioned on one surface of the circuit board.4. The electrical power tool as defined in further comprising an insulating material covering the circuit board.5. The electrical power tool as defined in further comprising a control unit attached to the circuit board.6. The electrical power tool as defined in further comprising a capacitor attached to the circuit board.7. An electrical power tool claim 1 , comprising:a motor housing extended in a front-rear direction;a motor received in a rear portion of the motor housing;a grip housing connected to a lower portion of the motor housing and extended vertically;a switch lever attached to an ...

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Номер записи: 59
16-05-2013 дата публикации

BRUSHLESS DC MOTORIZATION APPARATUS

Номер: US20130119809A1
Автор: Cros Jerome, Levesque Daniel
Принадлежит: BIONX INTERNATIONAL INC

A direct-drive brushless DC motorization apparatus comprises an outer rotor with poles constructed with segments of permanent magnet material alternatively magnetized north and south. The outer rotor is adapted to be part of a wheel and rotating with the wheel about an axis thereof. A stator core of ferromagnetic material is spaced inwardly of said rotor to define a clearance gap with the rotor such that the rotor is rotatable about the stator core. The stator core has forty-two slots and defines teeth therebetween. A three-phase winding with coils of insulated wire is wound around the teeth of the stator core. The three-phase winding is divided in two sets of consecutive teeth for each of the three phases, with each of the two sets of a same phase being diametrically opposed in the stator core. 1. A direct-drive brushless DC motorization apparatus comprising:an outer rotor with poles constructed with segments of permanent magnet material alternatively magnetized north and south, the outer rotor adapted to be part of a wheel and rotating with the wheel about an axis thereof;a stator core of ferromagnetic material spaced inwardly of said rotor and defining a clearance gap with the rotor such that the rotor is rotatable about the stator core, said stator core having forty-two slots and defining teeth between said slots; anda three-phase winding with coils of insulated wire being wound around the teeth of the stator core, the three-phase winding being divided in two sets of consecutive teeth for each of the three phases, with each of the two sets of a same phase being diametrically opposed in the stator core.2. The brushless DC motorization apparatus according to claim 1 , wherein the three-phase winding are divided into two sets of seven consecutive teeth for each of the three phases.3. The brushless DC motorization apparatus according to claim 1 , wherein each said phase of the three-phase winding is divided into sets of six and eight consecutive teeth.4. The ...

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Номер записи: 60
23-05-2013 дата публикации

Method of winding a stator core with a continuous conductor having a rectangular cross-section and a stator core

Номер: US20130127270A1
Автор: Mark A. Stephenson
Принадлежит: REMY TECHNOLOGIES LLC

A method of inserting a continuous conductor having a rectangular cross-section into slot segments formed in a stator core includes deforming in a first direction a core member having a first end portion that extends to a second end portion to widen an opening at end portions of the slot segments, inserting one or more continuous conductors having a rectangular cross-section into select ones of the slot segments, and deforming in a second direction the core member to narrow the opening at end portions of the slot segments.

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Номер записи: 61
23-05-2013 дата публикации

FLAT MOTOR

Номер: US20130127277A1
Автор: Kanai Naoki
Принадлежит: NIDEC SEIMITSU CORPORATION

A flat motor has a standard cylindrical bearing and the structure for fastening the bearing by sufficient strength. The flat motor has a rotor frame that is rotatably supported by a bearing through which the shaft passes, and a rotor frame has: flat portion which is formed by a flat plate and which has central hole; outer cylindrical portion which is formed in a cylindrical shape on the side of central hole of flat portion by bending the flat plate and lengthening in an axial direction of the shaft; and inner cylindrical portion to which bearing is fastened, and which is formed in a cylindrical shape on the inner circumstance side of outer cylindrical portion by bending the flat plate at the end opposite to the end of flat portion on the inside of rotor frame and lengthening in a direction contrary to the direction in which outer cylindrical portion lengthens. Since inner cylindrical portion is formed by bending the flat plate at the end of outer cylindrical portion on the inside of rotor frame, and lengthening in a direction contrary to the direction in which outer cylindrical portion lengthens, in inner cylindrical portion the force is generated, as reaction force generated based on mainly bending, toward the inside of rotor frame with a focus on the end opposite to the end of outer cylindrical portion, and cylindrical bearing is elastically fastened by the force generated toward the inside. 1. A flat motor comprising:a stator that supports one end of a shaft;a case that has a cylindrical portion with an open portion covered with the stator and that supports the other end of the shaft; anda rotor frame that is rotatably supported by a bearing through which the shaft passes, a flat portion formed by a flat plate;', 'an outer cylindrical portion that is formed in a cylindrical shape by bending the flat plate at the center of the flat portion and by lengthening in an axial direction of the shaft; and', 'an inner cylindrical portion that is formed in a cylindrical ...

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Номер записи: 62
23-05-2013 дата публикации

ROTOR OF AN ELECTRIC MOTOR AND MANUFACTURING METHOD OF SAME

Номер: US20130127283A1
Автор: Kitagawa Katsuhide, MATSUMOTO Masashi, YOSHIDA Makoto
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A rotor of an electric motor is provided in which a cylindrical rotor core that is formed by stacked magnetic steel sheets and includes permanent magnets is crimp-fixed to a rotor shaft. The rotor core is directly fixed, in the axial direction of the rotor shaft, between a flange portion that is provided on an outer periphery of the rotor shaft and abuts against one axial end surface of the rotor core, and a crimping member that is crimp-fixed on the rotor shaft while pressure-contacting the other axial end surface of the rotor core. 1. A rotor of an electric motor , comprising:a rotor core that is formed by stacked magnetic steel sheets and includes a permanent magnet;a rotor shaft to which the rotor core is fixed;a contact portion that is provided on an outer periphery of the rotor shaft and that abuts against one axial end surface of the rotor core; anda crimping member that is crimp-fixed on the rotor shaft, whereinthe rotor core is directly fixed, in an axial direction of the rotor shaft, between the contact portion and the crimping member.2. The rotor according to claim 1 , wherein a permanent magnet insertion hole for inserting the permanent magnet is formed extending in the axial direction in the rotor core claim 1 , and a weight-reducing hole for reducing a weight of the rotor is formed extending in the axial direction claim 1 , in a position radially inward of the permanent magnet insertion hole claim 1 , in the rotor core; and the weight-reducing hole is open at least at one axial end surface of the rotor core.3. The rotor according to claim 2 , wherein the permanent magnet inserted into the permanent magnet insertion hole is fixed in place by resin material filled between an inner wall of the permanent magnet insertion hole and a side surface of the permanent magnet.4. The rotor according to claim 3 , wherein an open portion claim 3 , in the axial end surface of the rotor claim 3 , of the permanent magnet insertion hole is closed off by the resin ...

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Номер записи: 63
23-05-2013 дата публикации

AIRCRAFT

Номер: US20130127284A1
Автор: Hamann Jens, Wolter Wolfgang
Принадлежит: Siemens Aktiengeselschaft

An aircraft includes a propeller and an electric motor which is constructed in the form of a drive for the propeller. The electric motor includes at least two air gaps that can be used for cooling. The air gaps define an axis of symmetry which corresponds to an axis of rotation of the propeller. 17.-. (canceled)8. An aircraft , comprising:a propeller; andan electric motor configured to drive the propeller, said electric motor having two stators separated by a rotor to define at least two air gaps there between.9. The aircraft of claim 8 , wherein the electric motor is a polyphase permanently-excited synchronous machine.10. The aircraft of claim 8 , wherein the electric motor has curved linear motor segments.11. The aircraft of claim 8 , wherein the rotor has a dome-shaped configuration and defines end areas provided with permanent magnets.12. The aircraft of claim 8 , wherein the rotor is configured for mechanical connection to a shaft of the propeller claim 8 , said rotor containing fiber-reinforced plastic.13. The aircraft of claim 12 , wherein the rotor is configured in the form of a disk made of carbon-fiber reinforced plastic.14. The aircraft of claim 12 , further comprising first and second bearings for support of the shaft claim 12 , said rotor being supported via the first and second bearings.15. The aircraft of claim 8 , wherein the air gaps define an axis of symmetry which corresponds to an axis of rotation of the propeller.16. The aircraft of claim 8 , further comprising a magnetic bearing supporting at least one of the propeller and the electric motor.17. The aircraft of claim 8 , wherein the stators are arranged in duplex arrangement to define an inner stator and an outer stator. The invention relates to an aircraft having a propeller.An aircraft which has at least one propeller is for example a fixed-wing aircraft or a rotary-wing aircraft. The storage of electrical energy is becoming increasingly more effective, so that the use of an electric motor as ...

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Номер записи: 64
30-05-2013 дата публикации

ROTOR FOR MOTOR AND METHOD FOR MANUFACTURING THE SAME

Номер: US20130134816A1
Автор: Kageyama Takashi, Nagahama Takaya, Nagase Shigeki, Naka Masami, Shibata Yoshiyuki
Принадлежит: JTEKT CORPORATION

Non-holding portions of a holding ring are demagnetized by supplying a nonmagnetic element to the non-holding portions while melting the non-holding portions by the application of heat. Each non-holding portion is demagnetized such that, from the melting center toward each melting end portion thereof, the material of the non-holding portion moderately changes from a nonmagnetic material to a ferromagnetic material. The permeability moderately changes, and hence generation of cogging torque during rotation of a rotor is suppressed. 1. A rotor for a motor , comprising:a rotor core that is formed of a plurality of laminated ferromagnetic plates;a plurality of permanent magnets arranged at predetermined intervals in an outer periphery of the rotor core; anda holding ring disposed on an outer peripheral portion of the rotor core so as to come into contact with and hold the plurality of permanent magnets,wherein the holding ring is made of a ferric ferromagnetic material, and formed of holding portions that hold the permanent magnets and non-holding portions that do not hold the permanent magnets, and the non-holding portions are demagnetized by supplying a nonmagnetic element to the non-holding portions while melting the non-holding portions by application of heat.2. The rotor for a motor according to claim 1 , wherein the non-holding portions in the holding ring are demagnetized by supplying the nonmagnetic element to the non-holding portions while changing a mixture ratio of the nonmagnetic element in a circumferential direction.3. The rotor for a motor according to claim 2 , wherein the non-holding portions in the holding ring are demagnetized by melting a circumferential center of each of the non-holding portions by application of heat and agitating the nonmagnetic element.4. The rotor for a motor according to claim 2 , wherein each of the non-holding portions in the holding ring is split into at least two regions claim 2 , and demagnetized by supplying the ...

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Номер записи: 65
30-05-2013 дата публикации

ROTOR FOR MOTOR AND METHOD OF MANUFACTURING THE SAME

Номер: US20130134817A1
Автор: Kageyama Takashi, KITAHATA Kouji, Nagahama Takaya, Nagase Shigeki, Naka Masami, Shibata Yoshiyuki
Принадлежит: JTEKT CORPORATION

At least part of each bridge portion is heated and molten to form a keyhole, and a nonmagnetic element is disposed around the keyhole. Thus, even when the width of the bridge portion in the radial direction is increased, the bridge portion is demagnetized. Therefore, leakage flux in the bridge portion is reduced, and the output power of a motor is increased. Moreover, by increasing the width of the bridge portion in the radial direction, the strength of the bridge portion is increased, and breakage of the bridge portion due to a centrifugal force at high-speed rotation of a rotor is prevented. 1. A rotor for a motor , comprising:a rotor core that is formed of a plurality of laminated ferromagnetic plates; anda permanent magnet that is accommodated in a slot that is formed in the rotor core so as to extend in an axial direction of the rotor core,wherein at least part of a bridge portion between an outer periphery of the rotor core and an end portion of the slot is heated by high-density energy to form a keyhole and form a molten pool around the keyhole, and a nonmagnetic element is disposed in the molten pool to demagnetize the at least part of the bridge portion.2. The rotor for a motor according to claim 1 , wherein the bridge portion is provided with a fixing portion for fixing the plurality of laminated ferromagnetic plates together.3. The rotor for a motor according to claim 2 , wherein the fixing portion is formed in a demagnetized region of the bridge portion.4. The rotor for a motor according to claim 2 , wherein the fixing portion is formed in a region of the bridge portion other than a demagnetized region.5. The rotor for a motor according to claim 1 , wherein the permanent magnet is pressed against inner faces of the slot and fixedly held by the rotor core claim 1 , by pressing and deforming the outer periphery of the rotor core radially inward after the at least part of the bridge portion is demagnetized.6. A method of manufacturing a rotor for a motor ...

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Номер записи: 66
30-05-2013 дата публикации

THREE-PHASE AXIAL FLUX MOTOR AND MAGNETIC PATH ADJUSTING METHOD THEREOF

Номер: US20130134818A1
Автор: CHUANG Kun-Fu, JAN Hsun-Hao, LAI Chin-Chun
Принадлежит: DELTA ELECTRONICS, INC.

A three-phase axial flux motor is disclosed. The axial flux motor includes a stator, a rotor and a driving unit. The stator includes three coils. The rotor is pivotally disposed on the stator and includes a magnet which has a magnetizing state. The driving unit outputs a sinusoidal phase voltage to the coils. The magnetizing state of the magnet is corresponding to the inductance waveform and the IEF (induced electromotive force) waveform of the stator to let the waveform of the driving phase current to be an approximative sine wave. 1. A three-phase axial flux motor , comprising:a stator comprising three coils;a rotor pivotally connected at the stator, wherein the rotor comprises a magnet, and the magnet has a magnetizing state; anda driving unit outputting a sinusoidal phase voltage to the coils, wherein the magnetizing state of the magnet is provided in correspondence to an inductance waveform and an IEF (induced electromotive force) waveform to let a waveform of a driving phase current flowing through the coils be an approximative sine wave.2. The three-phase axial flux motor according to claim 1 , wherein the stator comprises a core claim 1 , the core has a plurality of slots disposed independently to each other claim 1 , the number of the slots is a multiple of three claim 1 , and the coils are divided by three sets wound at the slots respectively.3. The three-phase axial flux motor according to claim 1 , wherein the inductance waveform and the IEF waveform of the stator are approximative sine waves.4. The three-phase axial flux motor according to claim 1 , wherein the ripple error of the inductance waveform in each phase is 78% to 80% claim 1 , and the maximum value difference and the minimum value difference between the phases are less than 1%.5. The three-phase axial flux motor according to claim 1 , wherein the difference between the waveform area of the IEF waveform and the waveform area of the sine wave having the same peak value and period is less than 5 ...

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Номер записи: 67
30-05-2013 дата публикации

ROTOR FOR ROTARY ELECTRIC MACHINE

Номер: US20130134823A1
Автор: Chinen Shintaro, Hiramoto Kenji, Mizutani Ryoji, Nakai Hideo, Yamada Eiji
Принадлежит:

A rotor includes a plurality of salient poles, each of which is formed by a plurality of plate members including steel plates that are stacked together, provided extending in a radial direction and around which a coil is wound. The plurality of salient poles has auxiliary salient poles that protrude from the salient poles between two salient poles that are adjacent to one another. The auxiliary salient poles are formed by only a first plate member that is a portion of plate members that forms the salient poles. 1. A rotor for a rotary electric machine , comprising:a plurality of teeth, each of which is formed by a plurality of plate members including steel plates that are stacked together, and around which a rotor coil is wound, the plurality of teeth extending in a radial direction, at least a portion of the plurality of teeth including a magnetic flux inducing section, the magnetic flux inducing section protruding between two of the teeth that are adjacent to one another, from at least a portion of a plurality of plate members that fatal at least one of the two teeth that are adjacent to one another; and the magnetic flux inducing section being formed by the plate members.2. The rotor according to claim I , wherein the magnetic flux inducing section is a plurality of magnetic flux inducing portions that protrude between the two teeth that are adjacent to one another , from a plurality of locations in an axial direction of the at least one of the teeth , and that are arranged with a gap in the axial direction one another.3. The rotor according to claim 2 , wherein the plurality of magnetic flux inducing portions includes a plurality of one-side magnetic flux inducing portions that protrude from a plurality of locations in the axial direction of one of the two teeth that are adjacent to one another claim 2 , and a plurality of other-side magnetic flux inducing portions that protrude from a plurality of locations in the axial direction of the other of the two teeth ...

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Номер записи: 68
06-06-2013 дата публикации

Spindle motor

Номер: US20130140942A1
Автор: Jong Ryeol Oh, Suk Ju Hong, Tae Jun Kim
Принадлежит: Samsung Electro Mechanics Co Ltd

There is provided a spindle motor including: a shaft rotatably supported by a sleeve; and a rotor hub fixedly installed on an upper end portion of the shaft, wherein the shaft includes a burr generation suppression part formed at the upper end portion thereof in order to suppress burr generation in an inner peripheral surface of the rotor hub in the case in which the rotor hub is press-fitted to the shaft.

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Номер записи: 69
13-06-2013 дата публикации

Reinforced magnet

Номер: US20130146206A1
Автор: David Michael Jones
Принадлежит: Dyson Technology Ltd

A magnet that includes a composite body and at least one reinforcing element. The reinforcing element is embedded within the body and increases the radial strength of the body. As a result, the magnet is able to rotate at higher speeds without fracturing. Additionally, methods of manufacturing the magnet are described.

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Номер записи: 70
13-06-2013 дата публикации

PERMANENT MAGNET ROTOR AND ELECTRIC MOTOR INCORPORATING THE ROTOR

Номер: US20130147301A1
Автор: HUANG Shi Xing, Jiang Mao Xiong, LI Yue, Zhang Ya Ming, ZHAO Jian, ZHU Xiao Ning
Принадлежит: JOHNSON ELECTRIC S.A.

A permanent magnet rotor includes a shaft, a rotor core fixed to the shaft, and multiple magnet sets. The rotor core has multiple groove sets for receiving the magnet sets. Each groove set has two grooves spaced apart by a first section of the rotor core. The first section has a width gradually decreasing from a radially inner end to a radially outer end. Each groove has a width gradually increasing from a radially inner end to a radially outer end. Each magnet set includes two magnets respectively received in the grooves of a respective groove set. The magnets of a magnet set are magnetized in a same direction, and every two adjacent magnet sets are magnetized in contrary directions creating multiple magnetic poles. The number of magnetic poles is equal to the number of magnet sets. 1. A permanent magnet rotor comprising:a shaft;a rotor core fixed to the shaft, the rotor core defining a plurality of groove sets, each groove set comprising two grooves which are spaced with a first section of the rotor core located there between, the first section having a width measured in a circumferential direction of the rotor core gradually decreasing from a radially inner end to a radially outer end, each groove having a width measured in the circumferential direction of the rotor core gradually increasing from a radially inner end to a radially outer end; anda plurality of magnet sets, each magnet set comprising two magnets respectively received in the two grooves of a respective groove set, the two magnets of a magnet set are magnetized in a same direction, every two adjacent magnet sets are magnetized in contrary directions to thereby form a plurality of magnetic poles of the rotor, and the number of the magnetic poles of the rotor is equal to the number of magnet sets.2. The permanent magnet rotor of claim 1 , wherein each two adjacent groove sets are spaced with a second section of the rotor core located there between claim 1 , and the second section has a width measured ...

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Номер записи: 71
20-06-2013 дата публикации

ROTOR FOR ELECTRIC MOTOR

Номер: US20130154425A1
Автор: Nakada Tohru
Принадлежит:

A rotor core is provided in which a plurality of poles each composed of a pair of first permanent magnets arranged in a V-shape open toward an outer peripheral side and a second permanent magnet arranged in parallel to a circumferential direction in an open part of the V-shape are arranged in the circumferential direction while alternately changing the polarities thereof. A groove is formed which has a groove center in a range between an electrical angle position shifted by ¼ cycle of a harmonic component of an induced voltage toward a d-axis and an electrical angle position shifted by ⅛ cycle of the harmonic component toward a q-axis from a base point located between a line connecting a rotor outer peripheral side corner portion of the second permanent magnet and a rotor shaft center and the q-axis out of a plurality of dividing lines connecting a plurality of dividing points set at an electrical angle interval corresponding to one cycle of the harmonic component from the d-axis to the q-axis on the rotor core outer periphery and the rotor shaft center. 18-. (canceled)9. A rotor for electric motor , comprising:a rotor shaft; anda rotor core in which a plurality of poles each composed of a pair of first permanent magnets arranged in a V-shape open toward an outer peripheral side and a second permanent magnet arranged in parallel to a circumferential direction in an open part of the V-shape are arranged in the circumferential direction while alternately changing the polarities thereof,wherein a groove is formed which has a groove center in a range between an electrical angle position shifted by ¼ cycle of a harmonic component of a torque ripple toward a d-axis and an electrical angle position shifted by ⅛ cycle of the harmonic component toward a q-axis from a base point located between a line connecting a rotor outer peripheral side corner portion of the second permanent magnet and the rotor shaft center and the q-axis out of a plurality of dividing lines connecting ...

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Номер записи: 72
20-06-2013 дата публикации

Disk-shaped multi-combined three-dimensional permanent magnet motor

Номер: US20130154449A1
Автор: Shen Kunyuan
Принадлежит:

A disk-shaped multi combined three-dimensional permanent magnet motor is provided. Two independent disk-shaped stators are respectively provided on a left side and a right side in a shell. A disk-shaped rotor with permanent magnets adhered on both a left face and a right face thereof is provided between the two independent disk-shaped stators. Spindle hole in the center of the rotor is coupled with a spindle of the main dynamical axis. Nine motor winding coils provided in side face slots of the disk-shaped stators are a unit for one motor. The left and right stators serve as one group to determine pole-pairs number of the motor which further determines numbers of the permanent magnets adhered. The motor is capable of driving load at low speed and meeting the function requirements of low-speed and high torque, which greatly improve efficiency of the whole machine. 1. A disk-shaped multi-combined three-dimensional permanent magnet motor , comprising: an upper shell , a lower shell , a front cover , a rear cover , a single-unit motor , a first rotor , a first stator , a double-unit motor , a second stator , a third stator , a second rotor and a main dynamical axis ,wherein said single-unit motor and said double-unit motor are respectively provided around said main dynamical axis,said first rotor and said second rotor which are cooperated with each other are connected with said main dynamical axis by coupling with spindles thereof, anda pulley, a first encoder and a second encoder respectively connected with an electronic control are provided on said main dynamical axis.2. The disk-shaped multi-combined three-dimensional permanent magnet motor claim 1 , as recited in claim 1 , wherein said first stator claim 1 , said second stator and said third stator comprise: a first stator magneto-resistance support claim 1 , a second stator magneto-resistance support claim 1 , a third stator magneto-resistance support claim 1 , a first iron core claim 1 , a second iron core claim 1 ...

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Номер записи: 73
27-06-2013 дата публикации

STATOR ASSEMBLY HAVING EMBEDDED MAGNETS FOR A POWER TOOL

Номер: US20130162067A1
Автор: Crosby Colin, Osborne Stephen, Zhang Jiaqi
Принадлежит: BLACK & DECKER INC.

A power tool is provided, including a housing, a permanent magnet electric motor in the housing, and an output member coupled to the electric motor. The electric motor includes a rotor and a stator with at least a North pole and a South pole. The stator includes a lamination stack of identically-shaped magnetically-conductive laminations with the identically-shaped pockets stamped therein and secured together in alignment to form the at least one magnet pocket at each pole. Each magnet pocket is contained within the lamination stack distanced from the inner and outer surfaces of the lamination stack. The stator further including at least one permanent magnet embedded within each magnet pocket of each pole. 1. A power tool , comprising:a housing;a permanent magnet electric motor in the housing, the electric motor including a rotor and a stator with at least a North pole and a South pole, the stator defining at least one magnet pocket at each pole, the stator comprising a lamination stack of identically-shaped magnetically-conductive laminations with the identically-shaped pockets stamped therein and secured together in alignment to form the at least one magnet pocket at each pole, each magnet pocket being contained within the lamination stack distanced from the inner and outer surfaces of the lamination stack, the stator further including at least one permanent magnet embedded within each magnet pocket of each pole; andan output member coupled to the electric motor.2. The power tool of claim 1 , wherein the stator defines a plurality of magnet pockets at each pole claim 1 , wherein only one permanent magnet is embedded within each magnet pocket.3. The power tool of claim 2 , wherein the stator further defines a plurality of air holes between the respective magnet pockets within each pole.4. The power tool of claim 1 , wherein each magnet pocket is embedded with a plurality of permanent magnets.5. The power tool of claim 4 , wherein the plurality of permanent magnets ...

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Номер записи: 74
27-06-2013 дата публикации

PERMANENT MAGNET ROTOR

Номер: US20130162090A1
Автор: IP Wai Shing, Kwok Lo Ching
Принадлежит: JOHNSON ELECTRIC S.A.

A permanent magnet rotor includes a shaft, a rotor core fixed to the shaft, a bracket fixed to the rotor core, and a plurality of permanent magnets contacting an outer surface of the rotor core. The bracket includes a base at one axial end thereof, a plurality of arms axially extending from the base and spaced in a circumferential direction, and an end ring connecting the arms at the other axial end thereof. The base has an opening for the insertion of the shaft. The rotor core is positioned between the arms. Each magnet is sandwiched between two adjacent arms. An inner diameter of the end ring is greater than an outer diameter of the rotor core. 1. A permanent magnet rotor comprising: a shaft; a rotor core fixed to the shaft; a bracket fixed to the rotor core; and a plurality of permanent magnets contacting an outer surface of the rotor core ,wherein the bracket comprises a base at one axial end thereof, an end ring at the other axial end thereof, and a plurality of arms axially extending between the base and the end ring and spaced in a circumferential direction,the base has an opening for the insertion of the shaft,the rotor core is positioned between the arms,each magnet is sandwiched between two adjacent arms, andan inner diameter of the end ring is greater than an outer diameter of the rotor core.2. The rotor of claim 1 , wherein the bracket is an interference fit with the rotor core.3. The rotor of claim 1 , wherein at least one receiving hole is formed at one axial end of the rotor core claim 1 , and at least one protrusion extends axially from a surface of the base facing the end ring and is arranged within the receiving hole as an interference fit.4. The rotor of claim 3 , wherein an annular recess is formed in the surface of the base) about the root of the or each protrusion.5. The rotor of claim 1 , wherein at least one slot is formed on a surface of the end ring remote from the base.6. The rotor of claim claim 1 , wherein at least one hole is formed in ...

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Номер записи: 75
04-07-2013 дата публикации

Electric machine cooling system

Номер: US20130171923A1
Автор: Joel Hetrick, Qubo Li
Принадлежит: Danotek Motion Technologies Inc

A cooling system for an electric machine is provided. The cooling system includes an airflow diverter feature configured to provide even distribution of airflow to the electric machine.

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Номер записи: 76
11-07-2013 дата публикации

DISK TYPE MAGNETIC GENERATOR

Номер: US20130175894A1
Автор: CHEN Hui-Lin
Принадлежит:

A disk type magnetic generator is a core-free magnetic generator including a shaft connected, in series, to a first rotor, a stator, and a second rotor or a core-included magnetic generator including a rotor and a stator connected in series. The rotor has a surface that is positioned against a stator plate and includes a number of flat-plate magnets arranged in a single circle and each forming an inclination angle with respect to a radius of rotor plate. The rotor plate alternatively includes multiple groups of magnets rotatably mounted on the same plate and arranged in concentric circles. The rotor alternatively includes multiple groups of magnets rotatably mounted in a diameter expansion direction and arranged in concentric circles. Alternatively, a combined assembly of a rotor and a stator that are connected in series by a driven shaft is provided with a rotatably connected weight ring in a diameter expansion direction. 1. A disk type magnetic generator , comprising a motor-coupled shaft that is connected , in series , to a first rotor , a stator , and a second rotor , the stator comprising a stator plate that forms , centrally , a stator plate bore and comprises a number of rotatable coils that are arranged in a single circle , the first rotor and the second rotor comprising two rotor plates each of which forms , centrally , a rotor plate bore and comprises a corresponding number of magnets that are arranged in a single circle to correspond to the number of rotatable coils that are mounted to the stator plate and arranged in a single circle , the first rotor and the second rotor being rotatable in unison with a driven shaft , whereby due to a bearing received and retained in the stator plate bore , the stator is kept stationary and enables connection with a power cable for power transmission so as to provide a core-free disk type magnetic generator that is characterized in that the first rotor and the second rotor each have a surface positioned against the ...

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Номер записи: 77
18-07-2013 дата публикации

Permanent magnet rotor with flux concentrating pole pieces

Номер: US20130181551A1
Автор: Alan G. Jack, Glynn James Atkinson, Lars-Olov Pennander
Принадлежит: HOGANAS AB

A permanent magnet machine is provided including a stator and a rotor, the rotor being adapted to rotate relative to the stator, the rotor including a plurality of permanent magnets separated in the circumferential direction from each other by radially extending rotor pole pieces for concentrating the magnetic flux from the permanent magnets, the stator having a structure that defines radial limits of an air gap between the stator and the rotor for communicating magnetic flux between the stator and the rotor, wherein at least some of the permanent magnets extend radially outside the radial limits of the air gap as defined by the stator structure.

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Номер записи: 78
25-07-2013 дата публикации

Magnetic brake

Номер: US20130186721A1
Автор: Bruce W. Keller, Jim M. Bogdanowicz, Manfred G. Michelson, Markus G. Michelson
Принадлежит: Technical Film Systems Inc

A magnetic brake has an outer stator surrounding an inner stator with a circumferential slot between the outer stator and the inner stator. A coil is provided in the inner stator adjacent to the circumferential slot. A drag plate is attached to a rotatable shaft extending centrally through the inner stator. A drag ring joined to the drag plate extend into the circumferential slot. The drag ring may be an annular cylindrical ring section separate from the drag plate. Vent holes pass through the inner stator adjacent and parallel to the shaft. The magnetic brake uses both hysteresis and eddy current braking.

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Номер записи: 79
25-07-2013 дата публикации

AXIAL GAP TYPE GENERATOR

Номер: US20130187393A1
Автор: Hisada Hiroyuki, NUMAGUCHI Kazuya
Принадлежит: FUJI JUKOGYO KABUSHIKI KAISHA

There is provided an axial gap type generator. The axial gap type generator includes: a stator core fixed to a crank case of an engine; a rotor yoke fixed to a crankshaft of the engine and opposing the stator core across spacing in an axial direction of the crankshaft; a first planar section provided in the crankshaft and formed to have a planar shape that is perpendicular to a rotation center axis; a second planar section provided at a base, at which the rotor yoke is mounted on the crankshaft, and disposed opposing the first planar section; and a shim clamped between the first planar section and the second planar section. 1. An axial gap type generator comprising:a stator core fixed to a crank case of an engine;a rotor yoke fixed to a crankshaft of the engine and opposing the stator core across a spacing in an axial direction of the crankshaft;a first planar section provided in the crankshaft and formed to have a planar shape that is perpendicular to a rotation center axis;a second planar section provided at a base, at which the rotor yoke is mounted on the crankshaft, and disposed opposing the first planar section; anda shim clamped between the first planar section and the second planar section.2. The axial gap type generator according to claim 1 , wherein a flywheel of the engine is mounted on the base. The present application claims priority from Japanese Patent Application No. 2012-009039 filed on Jan. 19, 2012, the entire contents of which are hereby incorporated by reference.1. Field of the InventionThe present invention relates to an axial gap type generator that is mounted on an engine, and more particularly, to an axial gap type generator in which gaps between stator cores and a rotor yoke can be set with satisfactory precision.2. Description of the Related ArtFor general-purpose engines or the like for industrial use, there is known a configuration in which a generator is connected with one end of a crankshaft protruding out of an engine main body.For ...

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Номер записи: 80
25-07-2013 дата публикации

ROTARING ELECTRICAL MACHINE

Номер: US20130187485A1
Автор: SAKAMOTO Masafumi, SATO Shigeyoshi, TAKEGUCHI Shunsuke
Принадлежит: NIPPON PISTON RING CO., LTD.

In a rotating electrical machine of radial-gap type, a radial core, having number of winding slots of “m”, is constructed as an integral compacting type by compacted powder or as a split compacting type with compacted powder. The radial core has a thickness in an axial direction of winding thereof so as to become thinner toward outward from a central portion thereof, in which the “m” is integer number in a range of 4 to 12. 1. A rotating electrical machine of radial-gap type in which a radial core , having number of winding slots of “m” , is constructed as an integral compacting type by compacted powder or as a split compacting type with compacted powder , wherein the radial core has a thickness in an axial direction of winding portion thereof in a manner to become thinner toward outward from a central portion thereof , in which the “m” is integer number in a range of 4 to 12 (not less than 4 and not more than 12).2. The rotating electrical machine according to claim 1 , wherein the radial core has an overhang portion in a rotating shaft direction and/or rotational circumferential direction.3. The rotating electrical machine according to claim 1 , wherein when the radial core is joined and fixed after winding of the radial core claim 1 , the “m” junction portions are subjected to either one of welding process claim 1 , adhesion process or resin molding process claim 1 , or combination thereof.4. The rotating electrical machine according to claim 1 , wherein the compacted powder forming the radial core is subjected to at least one of resin coating treatment and resin impregnation treatment claim 1 , or both the treatments.5. The rotating electrical machine according to claim 1 , wherein the rotating electrical machine is an inverted rotor type rotating electrical machine claim 1 , in which when the winding is wound around the radial core and then integrated and fixed claim 1 , a cylindrical member is inserted into the integrated radial core and fitted to an inner ...

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Номер записи: 81
25-07-2013 дата публикации

MOTOR AND ROTOR THEREOF

Номер: US20130187486A1
Автор: AN Young Gyu, HAN Jin Woo, IN Byung Ryel, Kim Deok Jin, Kim Young Kwan, Lee Jae Young
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A rotor having an improved structure capable of achieving an enhancement in durability and a motor having the rotor are disclosed. The rotor is configured to co-operate with a stator in an electromagnetic manner such that the rotor rotates. The rotor includes a sleeve having a shaft hole, through which the motor shaft extends, rotor cores spaced apart from one another in a circumferential direction of the rotor, and at least one of permanent magnets disposed between adjacent ones of the rotor cores such that the permanent magnets are arranged in a radial manner about the sleeve. First and second cover plates are disposed at opposite sides of the permanent magnets in an axial direction. The first and second cover plates have plate holes respectively corresponding to the through holes of the rotor cores. The rotor cores and the first and second cover plates are coupled by fastening members. 1. A motor comprising:a stator comprising stator cores and coils wound around the stator cores;a rotor to co-operate with the stator in an electromagnetic manner such that the rotor rotates; anda motor shaft coupled to the rotor, to rotate along with the rotor,wherein the rotor comprises:a sleeve having a shaft hole, through which the motor shaft extends;a plurality of rotor cores arranged to be spaced apart from one another in a circumferential direction of the rotor, at least one of the rotor cores having a through hole;at least one of permanent magnets disposed between adjacent ones of the rotor cores such that the permanent magnets are arranged in a radial manner about the sleeve;first and second cover plates disposed at opposite sides of the permanent magnets in an axial direction, the first and second cover plates having a plurality of plate holes respectively corresponding to the through holes of the rotor cores; andat least one of fastening members coupled to a corresponding one of the rotor cores and the first and second cover plates, at least one of the fastening members ...

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Номер записи: 82
25-07-2013 дата публикации

BRUSHLESS MOTOR

Номер: US20130187487A1
Автор: Hanai Kazumichi, Honda Yoshihiko, Kawakita Yoichi
Принадлежит: AISAN KOGYO KABUSHIKI KAISHA

A brushless motor may comprise a rotor comprising a shaft, a back yoke fixed on the shaft, a permanent magnet disposed at an outer circumference of the back yoke and first and second resin portions. The first resin portion may be formed at one ends of the back yoke and the permanent magnet and the second resin portion may be formed at other ends. The first and second resin portions may be fixed the back yoke and the permanent magnet. A communication hole communicating one end side and another end side in the shaft axis direction may be formed through the back yoke or between the shaft and the back yoke. A third resin portion connecting with the first and the second resin portions may be formed within the communication hole. The first, second and third resin portions may be formed integrally. 1. A brushless motor comprising:a rotor; anda stator disposed at an outer circumference of the rotor, whereinthe rotor comprises:a shaft;a back yoke fixed on the shaft;a permanent magnet disposed at an outer circumference of the back yoke;a first resin portion formed at one ends of the back yoke and the permanent magnet in a shaft axis direction, and configured to fix the back yoke and the permanent magnet; anda second resin portion formed at other ends of the back yoke and the permanent magnet in the shaft axis direction, and configured to fix the back yoke and the permanent magnet,a communication hole that communicates one end side and another end side in the shaft axis direction is formed through the back yoke, between the shaft and the back yoke, or in a combination thereof,a third resin portion is formed within the communication hole,the third resin portion is configured to connect with the first resin portion and the second resin portion, andthe first resin portion, the second resin portion and the third resin portion are formed integrally.2. The brushless motor as in claim 1 , further comprises:a fourth resin portion configured to cover an outer circumferential surface of ...

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Номер записи: 83
25-07-2013 дата публикации

Motor and rotor thereof

Номер: US20130187506A1
Автор: Byung Ryel IN, Deok Jin Kim, Jae Young Lee, Jin Woo Han, Young Gyu An, Young Kwan Kim
Принадлежит: SAMSUNG ELECTRONICS CO LTD

A rotor having an improved structure capable of achieving enhanced durability is disposed in a motor, the rotor including a sleeve having a shaft hole, through which a motor shaft extends, rotor cores spaced apart from one another in a circumferential direction of the rotor, and permanent magnets each disposed between adjacent ones of the rotor cores such that the permanent magnets are arranged in a radial manner about the sleeve. First and second cover plates may be disposed at opposite sides of the permanent magnets in an axial direction. Each of the first and second cover plates may include a shaft receiving hole to receive the motor shaft. The rotor may include a plurality of support members each having a magnet support portion arranged to support an outer end of a corresponding one of the permanent magnets in a radial direction of the rotor.

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Номер записи: 84
25-07-2013 дата публикации

ROTOR COMPRISING ADDED POLE SHOES COVERING THE MAGNETS AND A ROTARY ELECTRIC MACHINE

Номер: US20130187507A1
Автор: Fouquart Colas, Messin Yannick, Rigaud Pierre, Verchere Thomas
Принадлежит: MOTEURS LEROY-SOMER

The present invention relates to a rotor for a rotary electric machine, comprising: a hub comprising a stack of sheets, permanent magnets arranged on the surface of the stack of sheets, pole shoes covering the magnets and an attachment means for holding the pole shoes on the hub. 113-. (canceled)14. A rotor for an electric rotary machine , comprising:a hub comprising a stack of sheets,permanent magnets arranged on the surface of the stack of sheets,pole shoes covering the magnets, andattachment means for holding the fitted pole shoes on the hub.15. The rotor as claimed in claim 14 , the attachment means passing through the magnets.16. The rotor as claimed in claim 14 , the attachment means being amagnetic.17. The rotor as claimed in claim 16 , the attachment means being amagnetic comprising amagneric screws.18. The rotor as claimed in claim 17 , the screws comprising heads set back from the radially outer surface of the pole shoes.19. The rotor as claimed in claim 14 , the attachment means being engaged in the pole shoes via a radially outer side of the rotor.20. The rotor as claimed in claim 14 , the amagnetic attachment means being engaged on bars inserted into the stack of sheets of the hub.21. The rotor as claimed in claim 20 , the bars being held in slide rails arranged in the stack of sheets of the hub.22. The rotor as claimed in claim 14 , at least one pole shoe comprising a plurality of elements stacked along the rotation axis (X) and held together.23. The rotor as claimed in claim 22 , at least one pole shoe comprising a plurality of elements stacked along the rotation axis (x) and held together by tie-rods.24. The rotor as claimed in claim 14 , comprising lateral plates for protecting the magnets claim 14 , placed between the stack of sheets of the hub and the pole shoes.25. The rotor as claimed in claim 24 , the plates being engaged in slide rails formed between the stack of sheets of the hub and the pole shoes.26. The rotor as claimed in claim 14 , the ...

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Номер записи: 85
25-07-2013 дата публикации

Vehicular Alternating Current Generator

Номер: US20130187515A1
Автор: ISHIKAWA Yoshihisa, Koyama Takayuki, MIYATA Kenji
Принадлежит: HITACHI LTD.

A vehicular alternating current generator includes a Lundell rotor and a stator. The Lundell rotor includes a cylindrical portion around which a field coil is wound; plate-shaped first and second end plate portions disposed on both end faces in an axial direction of the cylindrical portion so as to face each other; a plurality of first claw portions extending in parallel with a rotational axis in a direction from the first end plate portion to the second end plate portion; and second claw portions extending in parallel with the rotational axis in a direction from the second end plate portion to the first end plate portion, the second claw portions being disposed circumferentially and alternately relative to the first claw portions. The stator is disposed on an outer periphery of the rotor so as to face the rotor with a small rotational air gap there between. 1. A nominal φ128 vehicular alternating current generator , comprising: a cylindrical portion around which a field coil is wound;', 'plate-shaped first and second end plate portions disposed on both end faces in an axial direction of the cylindrical portion so as to face each other;', 'a plurality of first claw portions extending in parallel with a rotational axis in a direction from the first end plate portion to the second end plate portion; and', 'second claw portions extending in parallel with the rotational axis in a direction from the second end plate portion to the first end plate portion, the second claw portions being disposed circumferentially and alternately relative to the first claw portions; and, 'a Lundell rotor includinga stator disposed on an outer periphery of the Lundell rotor so as to face the Lundell rotor with a small rotational air gap therebetween, the stator having a laminated core around which an armature coil is wound, whereineach of the first and second end plate portions includes a disk zone that is continuous around an entire circumference of the rotational axis and a plurality of ...

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Номер записи: 86
01-08-2013 дата публикации

SPINDLE MOTOR

Номер: US20130193794A1
Автор: LEE Dong Woo
Принадлежит: SAMSUNG ELECTRO-MECHANICS CO., LTD.

Disclosed herein is a spindle motor in which the center of a main magnet configuring a rotor is positioned at a position higher than that of the center of a core configuring an armature, such that magnetic force generated in the main magnet acts downwardly, thereby easily preventing the floating of the rotor. 1. A spindle motor comprising:an armature including a core;a rotor including a main magnet disposed to face the core to generate electromagnetic force; anda stator rotatably supporting the rotor,wherein the center of the main magnet is positioned at a position higher than that of the center of the core by 0.1 mm to 0.4 mm.2. The spindle motor as set forth in claim 1 , wherein the rotor includes:a shaft;a rotor case fixed to the shaft and having the main magnet provided at an inner portion thereof; anda clamp installed at an upper portion of the rotor case to elastically support a recording medium.3. The spindle motor as set forth in claim 2 , wherein the stator includes:a bearing rotatably supporting the shaft;a bearing holder having the bearing inserted thereinto;a plate having the bearing holder installed thereon and a substrate.4. The spindle motor as set forth in claim 3 , wherein the stator further includes a stopper and a thrust provided on the bearing holder. This application claims the benefit of Korean Patent Application No. 10-2011-0110726, filed on Oct. 27, 2011, entitled “Spindle Motor”, which is hereby incorporated by reference in its entirety into this application.1. Technical FieldThe present invention relates to a spindle motor.2. Description of the Related ArtIn a spindle motor, a shaft rotates while maintaining a predetermined contact section between a bearing and the shaft, such that rotational characteristics may be easily maintained. Therefore, the spindle motor has been widely used as a driving unit of a recording medium requiring high speed rotation, such as a hard disk drive (HDD), an optical disk drive (ODD), or the like.The spindle ...

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Номер записи: 87
08-08-2013 дата публикации

Axial Gap Rotating Electrical Machine

Номер: US20130200630A1
Автор: McCleer Patrick J., Sharples William G.
Принадлежит: CLEAR PATH ENERGY, LLC

Direct drive rotating electrical machines with axial air gaps are disclosed. In these machines, a rotor ring and stator ring define an axial air gap between them. Sets of gap-maintaining rolling supports bear between the rotor ring and the stator ring at their peripheries to maintain the axial air gap. Also disclosed are wind turbines using these generators, and structures and methods for mounting direct drive rotating electrical generators to the hubs of wind turbines. In particular, the rotor ring of the generator may be carried directly by the hub of a wind turbine to rotate relative to a shaft without being mounted directly to the shaft. 1. A generator comprising:a rotor ring having a peripheral channel with respective left and right sidewall portions and a central web portion arranged between the left and right sidewall portions, opposite faces of the central web portion carrying respective first and second sets of magnetic elements;a stator ring with a peripheral portion that is sized and adapted to be at least partially received in the peripheral channel of the rotor ring between the left and right sidewalls, the peripheral portion having left and right inner faces carrying respective first and second sets of stator teeth, respectively, each of the stator teeth having windings or coils, the rotor ring being constructed and arranged to rotate relative to the stator ring, the positioning of the stator ring relative to the rotor ring establishing first and second axial air gaps between the first and second sets of magnetic elements and the first and second sets of stator teeth; andone or more sets of rolling gap supports bearing between the stator ring and the rotor ring so as to maintain first and second axial air gaps.2. The generator of claim 1 , wherein the one or more sets of rolling gap supports bear between the stator ring and the central web portion of the peripheral channel of the rotor ring.3. The generator of claim 1 , wherein the peripheral portion ...

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Номер записи: 88
08-08-2013 дата публикации

POWER TOOL

Номер: US20130200733A1
Автор: LAU James Ching-Sik
Принадлежит: JOHNSON ELECTRIC S.A.

A power tool includes a casing with an inlet and an outlet extending in a radial direction of the casing, a motor installed within the casing between the inlet and the outlet. The motor includes a stator and a rotor with a shaft, an air passage being formed between a radially outer surface of the stator and an inner surface of the casing. The air passage extends in the axial direction of the casing. A heat dissipation device is arranged on the radially outer surface of the stator for absorbing heat from the stator, and is disposed in the air passage. A fan is fixed to the shaft of the rotor. Air flow generated by the fan enters the casing via the inlet and exits the casing via the outlet after passing through the air passage and the heat dissipation device, 1. A power tool comprising:a casing with an inlet and an outlet extending in a radial direction of the casing;a motor installed within the casing between the inlet and the outlet, the motor comprising a stator and a rotor with a shaft, an air passage being formed between a radially outer surface of the stator and an inner surface of the casing, the air passage extending in a direction parallel to an axial direction of the casing;a heat dissipation device being arranged on the radially outer surface of the stator for absorbing heat from the stator, the heat dissipation device being disposed in the air passage; anda fan attached to the shaft of the rotor,wherein air flow generated by the fan enters the casing via the inlet and exits the casing via the outlet after passing through the air passage and heat dissipation device.2. The power tool of claim 1 , wherein the fan is a centrifugal fan that is located at one end of the motor with a radially outer side of the fan facing the outlet.3. The power tool of claim 2 , wherein the fan extends radially beyond the radially outer surface of the stator.4. The power tool of claim 1 , wherein the heat dissipation device comprises a plurality of fins that extend in a direction ...

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Номер записи: 89
08-08-2013 дата публикации

ELECTRICAL MACHINES

Номер: US20130200734A1
Автор: Greer John Michael
Принадлежит: GE ENERGY POWER CONVERSION TECHNOLOGY LTD.

The invention relates to a component such as a rotor or stator for an electrical machine. The component includes a plurality of axially adjacent stacks of laminations. At least one pair of adjacent stacks are spaced apart in the axial direction by spacer means such that a passageway or duct for cooling fluid, e.g. air, is formed therebetween. The spacer means comprises a porous structural mat of metal fibres. The cooling fluid may flow through the spaces or voids between the fibres. 1. A component for an electrical machine comprising a plurality of axially adjacent stacks of laminations , wherein at least one pair of adjacent stacks is spaced apart by spacer means such that a passageway for cooling fluid is formed between the at least one pair of adjacent stacks , the spacer means comprising a porous structural mat of metal fibres.2. The component of claim 1 , wherein the mat is joined to a metal face plate.3. The component of claim 1 , wherein the mat is sandwiched between claim 1 , and joined to claim 1 , a pair of metal face plates.4. The component of claim 1 , being a rotor or stator for an electrical machine.5. An electrical machine incorporating a component comprising a plurality of axially adjacent stacks of laminations claim 1 , wherein at least one pair of adjacent stacks is spaced apart by spacer means such that a passageway for cooling fluid is formed between the at least one pair of adjacent stacks claim 1 , the spacer means comprising a porous structural mat of metal fibres.6. A method of cooling a component for an electrical machine comprising a plurality of axially adjacent stacks of laminations claim 1 , wherein at least one pair of adjacent stacks are spaced apart by spacer means such that a passageway for cooling fluid is formed between the at least one pair of adjacent stacks claim 1 , the spacer means comprising a porous structural mat of metal fibres claim 1 , the method comprising passing a cooling fluid through the space between the metal ...

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Номер записи: 90
08-08-2013 дата публикации

Method and Apparatus for Permanent Magnet Attachment in an Electromechanical Machine

Номер: US20130200735A1
Автор: Lynch Jonathan A., Mongeau Peter P., Piercey Mark S.
Принадлежит: NORTHERN POWER SYSTEMS UTILITY SCALE, INC.

An apparatus and method for the installation and removal of permanent magnets in a permanent magnet electromechanical machine, for example a wind turbine power unit generator. A magnet holder is mounted on a magnet carrying structure such as a rotor. Permanent magnets may be inserted into and removed from the magnet holder after the electromechanical machine is assembled. The magnet holders define passages for airflow between the inside top and magnet surface. In this manner, permanent magnets may be installed on the magnet carrying structure and provided with additional cooling via said passages. Further, the holders may be configured to secure the magnets by an interference fit, without using bolts or adhesives, to facilitate both assembly and removal for maintenance and repair. 1. A rotor assembly in a permanent magnet electromechanical machine , comprising:a rotor having plural magnet mounting surfaces;a plurality of magnet holders, one at each magnet mounting surface on the rotor, each magnet holder having a top inside surface;a plurality of magnets, one each retained on said magnet mounting surfaces within a magnet holder, each said magnet having a top surface opposite the magnet mounting surface; andat least one void defined between said holder top inside surface and said magnet top surface, said at least one void occupying about 90% to 100% of the space between said surfaces.2. The rotor assembly of claim 1 , wherein said holder top inside surface is spaced from the rotor mounting surface by a first predetermined height and said magnet top surface is spaced from said rotor mounting surface by a second predetermined height greater than said first predetermined height of the magnet holder to form an interference fit between the holder top inside surface and the magnet top surface.3. The rotor assembly of claim 2 , wherein said holder top inside surface and said magnet top surface are configured in combination to form said interference fit as a line contact ...

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Номер записи: 91
08-08-2013 дата публикации

Motor

Номер: US20130200739A1
Автор: Keun Young Yoon, Su Kwon JEONG, Sung Gu Lee, Young Kwan Kim
Принадлежит: SAMSUNG ELECTRONICS CO LTD

A motor realizes mechanical field-weakening control by controlling the leakage magnetic flux from the rotor cores of the motor. The motor includes a stator, a rotor including rotor cores circumferentially spaced apart from one another inside the stator and permanent magnets disposed between the respective rotor cores which extend radially from the stator, and a magnetic flux adjustment unit including a ring-shaped main frame, magnetic substance portions extending from the main frame so as to be circumferentially spaced apart from one another and non-magnetic regions defined between the magnetic substance portions. The magnetic flux adjustment unit is rotatable to control the leakage magnetic flux from the rotor cores.

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Номер записи: 92
08-08-2013 дата публикации

STATOR MAGNET WIRE END COIL RETENTION SYSTEM

Номер: US20130200745A1
Автор: Knapp John M.
Принадлежит: BAKER HUGHES INCORPORATED

The invention includes a retention system and method for stator magnet wires. In embodiments, the retention system includes a packing ring that can swell to a larger size following installation. In embodiments, the lubricant used in the motor causes the packing ring to swell. When the packing ring swells, it exerts pressure against the end turns of the stator magnet wires, and can contour to the shape of the wires so that there are no pressure points on the wires. A rigid support ring can be positioned concentric with the packing ring so that the packing ring does not swell toward the axis of the motor housing. 1. An apparatus for pumping fluid from a well , the apparatus comprising:a pump adapted to pump production fluid from a wellbore;a motor assembly operably connected to the pump, the motor assembly comprising:a housing,a winding, the winding comprising a magnet wire having a plurality linear segments running generally parallel to the axis of the housing and a plurality of end turns proximate to an end of the housing and connecting each linear segment, the plurality of linear segments and end turns being positioned around an inner diameter of the housing to define a winding inner diameter therethrough;a rotor positioned concentrically within the winding inner diameter;a lubricant within the housing to lubricate the rotor; andan annular coil packing ring, the coil packing ring being positioned proximate to the winding and at least a portion of the end turns of the winding to restrain movement of the end turns.2. The apparatus according to claim 1 , wherein the lubricant causes the coil packing ring to swell.3. The apparatus according to claim 1 , wherein the coil packing ring comprises ethylene propylene diene monomer (M-class) rubber.4. The apparatus according to claim 1 , wherein the coil packing ring comprises a packing ring cylinder and a packing ring flange claim 1 , at least a portion of the packing ring cylinder being positioned concentrically within the ...

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Номер записи: 93
08-08-2013 дата публикации

SPINDLE MOTOR AND DISK DRIVE APPARATUS

Номер: US20130201812A1
Автор: Du Hongbing, Enokizono Kazuya, Hashimoto Junichi, Himeno Toshikazu, Sumi Shigeharu
Принадлежит: NIDEC CORPORATION

A spindle motor includes a flat stator, a rotor magnet arranged above the stator, and a magnetic portion made of a ferromagnetic material. The magnetic portion is positioned lower than the stator and the magnetic portion are axially overlapped with coils. A magnetic attraction force is generated between the magnetic portion and the rotor magnet. Since the magnetic portion is positioned lower than the stator, it is possible to cause magnetic fluxes to efficiently flow between the rotor magnet and the stator. Further, the stator includes a protrusion protruded radially outward beyond an outer circumferential portion of a rotor hub. Accordingly, in a plan view, the stator is positioned radially outward of the rotor hub. 1. A spindle motor , comprising:a stationary unit; anda rotary unit rotatable about a center axis with respect to the stationary unit,wherein the stationary unit includes a base plate provided with a step portion and a stator provided with a coil and arranged on the base plate,the rotary unit includes a rotor hub arranged axially above the base plate, a rotor magnet arranged above the stator and axially opposed to the stator with a first gap left between the rotor magnet and the stator and a rotor yoke arranged between the stator and the base plate and axially opposed to the stator with a second gap left between the yoke and the stator,the stator includes a protrusion positioned radially outward of the coil to protrude radially outward beyond an outer circumferential portion of the rotor hub, andthe protrusion includes an outer circumferential portion kept in contact with a wall surface of the step portion or opposed to the wall surface of the step portion with a clearance left therebetween.2. A spindle motor , comprising:a stationary unit; anda rotary unit rotatable about a center axis with respect to the stationary unit,wherein the stationary unit includes a base plate provided with a step portion and a stator provided with a coil and arranged on the ...

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Номер записи: 94
15-08-2013 дата публикации

ROTOR ASSEMBLY FOR MOTOR AND SPINDLE MOTOR INCLUDING THE SAME

Номер: US20130207499A1
Автор: KIM Jae Yoon, KIM Pyo, RHEE Dong Woo, Yoo Ho Jun
Принадлежит: SAMSUNG ELECTRO-MECHANICS CO., LTD.

There are provided a rotor assembly for a motor and a spindle motor including the same. The rotor assembly includes: a rotor case including a rotor hub fixed to a shaft, a rotor extension part extended from the rotor hub in an outer radial direction, and a magnet coupling part extended from the rotor extension part in a downward axial direction; and a magnet provided on an inner surface of the magnet coupling part, wherein a thickness of the magnet in a radial direction may correspond to 8.5 to 20% of a distance from a center of rotation of the rotor case to an edge of the rotor case in the outer radial direction. 1. A rotor assembly for a motor , comprising:a rotor case including a rotor hub fixed to a shaft, a rotor extension part extended from the rotor hub in an outer radial direction, and a magnet coupling part extended from the rotor extension part in a downward axial direction; anda magnet provided on an inner surface of the magnet coupling part,wherein a thickness of the magnet in a radial direction corresponds to 8.5 to 20% of a distance from a center of rotation of the rotor case to an edge of the rotor case in the outer radial direction.2. The rotor assembly of claim 1 , wherein the magnet is formed of at least one of ferrite and samarium cobalt (SmCo).3. The rotor assembly of claim 1 , wherein the magnet is provided in an annular ring shape on the inner surface of the magnetic coupling part.4. A spindle motor comprising:a sleeve supporting a shaft such that an upper end of the shaft protrudes in an upward axial direction;a rotor assembly for a motor, including a rotor case including a rotor hub fixed to a shaft, a rotor extension part extended from the rotor hub in an outer radial direction, and a magnet coupling part extended from the rotor extension part in a downward axial direction, and a magnet provided on an inner surface of the magnet coupling part, a thickness of the magnet in a radial direction corresponding to 8.5 to 20% of a distance from a ...

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Номер записи: 95
15-08-2013 дата публикации

Three-phase alternating current permanent magnet motor

Номер: US20130207500A1
Автор: Lei Bi
Принадлежит: Fortior Technology Shenzhen Co Ltd

A three-phase PMAC motor comprises a rotor and a stator. The rotor includes a rotor iron core, a plurality of rotor teeth, a plurality of rotor slots each formed between two adjacent rotor teeth, and a plurality of permanent magnets disposed in respective rotor slots and attached on the rotor iron core. The plurality of permanent magnets forms at least 8 pairs of magnet poles with one or two permanent magnets being associated with one pair of magnetic poles. The stator includes a stator iron core, a plurality of stator teeth protruding inwardly from inner surface of the stator iron core, three groups of armature windings wound around each of the stator teeth, and a plurality of stator slots formed between two adjacent stator teeth. Each group of armature windings is associated with one electrical phase. An electrical phase shift exists between each two armature windings.

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Номер записи: 96
15-08-2013 дата публикации

ROTARY ELECTRIC MACHINE

Номер: US20130207501A1
Автор: MAEMURA Akihiko, TOMOHARA Kenji
Принадлежит: KABUSHIKI KAISHA YASKAWA DENKI

A rotary electric machine includes a rotor core in which first magnetic pole portions having permanent magnets and second magnetic pole portions having no permanent magnets are alternately arranged in a circumferential direction. Each of the second magnetic pole portions has at least one notch provided near the permanent magnet adjacent thereto. 1. A rotary electric machine comprising:a rotor core in which first magnetic pole portions having permanent magnets and second magnetic pole portions having no permanent magnets are alternately arranged in a circumferential direction,each of the second magnetic pole portions having at least one notch provided near the permanent magnet adjacent thereto.2. The rotary electric machine of claim 1 , wherein the at least one notch includes a first notch and a second notch which are provided in circumferentially opposite sides of each of the second magnetic pole portions.3. The rotary electric machine of claim 2 , wherein a thickness of a portion of the rotor core between the first notch and the side surface of the permanent magnet adjacent thereto claim 2 , and a thickness of a portion of the rotor core between the second notch and the side surface of the permanent magnet adjacent thereto are smaller than a width of the second magnetic pole portion between the first notch and the second notch in the circumferential direction.4. The rotary electric machine of claim 1 , wherein the notch has a circumferential width which is gradually reduced toward an inner peripheral side of the rotor core when viewed in a cross section perpendicular to a rotational axis of the rotor core.5. The rotary electric machine of claim 2 , wherein the notch has a circumferential width which is gradually reduced toward an inner peripheral side of the rotor core when viewed in a cross section perpendicular to a rotational axis of the rotor core.6. The rotary electric machine of claim 3 , wherein the notch has a circumferential width which is gradually ...

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Номер записи: 97
15-08-2013 дата публикации

Rotor and motor

Номер: US20130207503A1
Автор: Chie Morita, Yoji Yamada
Принадлежит: Asmo Co Ltd

A rotor includes a first rotor core, a second rotor core, a field magnet, and an adhesive. The first rotor core includes a first core base, having a first magnet fixing surface, and a plurality of first claw-poles. The second rotor core includes a second core base having a second magnet fixing surface, and a plurality of second claw-poles. The field magnet includes a first axial end face and a second axial end face. At least one of the first magnet fixing surface and the first axial end face includes a first adhesive recess that receives an adhesive. At least one of the second magnet fixing surface and the second axial end face includes a second adhesive recess that receives the adhesive.

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Номер записи: 98
15-08-2013 дата публикации

ROTARY ELECTRIC MACHINE

Номер: US20130207508A1
Автор: MAEMURA Akihiko, TOMOHARA Kenji
Принадлежит: KABUSHIKI KAISHA YASKAWA DENKI

A rotary electric machine includes a rotor core in which first magnetic pole portions having permanent magnets and second magnetic pole portions having no permanent magnets are alternately arranged in a circumferential direction; and a stator core which is arranged to face an outer periphery of the rotor core. The rotor core is configured such that an average gap length between the stator core and the second magnetic pole portions is larger than an average gap length between the stator core and the first magnetic pole portions. 1. A rotary electric machine comprising:a rotor core in which first magnetic pole portions having permanent magnets and second magnetic pole portions having no permanent magnets are alternately arranged in a circumferential direction; anda stator core which is arranged to face an outer periphery of the rotor core, the rotor core being configured such that an average gap length between the stator core and the second magnetic pole portions is larger than an average gap length between the stator core and the first magnetic pole portions.2. The rotary electric machine of claim 1 , wherein a thickness of each of the permanent magnets in a direction of a d-axis magnetic flux passing therethrough is larger than a minimum interval between the permanent magnets of adjacent two of the first magnetic pole portions.3. The rotary electric machine of claim 1 , wherein a thickness of the permanent magnets in a radial direction of the rotor core is larger than a minimum interval between the permanent magnets of adjacent two of first magnetic pole portions.4. The rotary electric machine of claim 2 , wherein a thickness of the permanent magnets in a radial direction of the rotor core is larger than a minimum interval between the permanent magnets of adjacent two of first magnetic pole portions.5. The rotary electric machine of claim 1 , wherein the permanent magnets are embedded in the vicinity of the outer periphery of the rotor core.6. The rotary electric ...

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Номер записи: 99
22-08-2013 дата публикации

Split permanent magnet machine

Номер: US20130214541A1
Автор: Johan Nico Stander, Johannes Hendrik Jacob Potgieter, Maarten Jan Kamper
Принадлежит: STELLENBOSCH UNIVERSITY

The invention relates to an electrical energy conversion system ( 11 ) which is particularly suited for use in wind energy conversion systems. The system includes two magnetically separated permanent magnet machines ( 25, 27 ) linked by a freely rotating rotor ( 19 ) housing permanent magnets ( 39 ). The first machine is typically a synchronous generator, and the second an induction generator. The synchronous generator ( 25 ) has a stationary stator ( 21 ) which is connectable to an electrical system such as an electricity grid, and the induction generator ( 27 ) has a rotor ( 17 ) which is connectable to a mechanical drive system such as, for example, a wind turbine.

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Номер записи: 100