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Небесная энциклопедия

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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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 4. Отображено 4.
18-02-2015 дата публикации

Heat pump unit on-line controller

Номер: CN104359261A
Автор: LIU LEI, HAN CHANGZHONG, ZHANG YANQIAO, CHEN TAO, XIAO NA
Принадлежит:

The invention provides a heat pump unit on-line controller which is characterized in that the heat pump unit on-line controller comprises a power-switching circuit, wherein the power-swithing circuit is used for providing a power supply for the whole controller, the input end of the power-switching circuit is connected with the mains supply, the output end of the power-switching circuit is connected with a processor, the processor is connected with a crystal oscillator circuit, a resetting circuit, an LED (light emitting diode) array, a draught fan signal and a switch circuit, the switch circuit is connected with a heat pump unit, and the heat pump unit comprises a plurality of outdoor main engines and a water returning pump. The condition that the controller is operated by a plurality of heat pump units at present on market does not exist, and the multiple unit on-line controlling can be safely and effectively realized.

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Номер записи: 1
13-06-2023 дата публикации

Direct-current bus variable-structure doubly-fed strong excitation converter

Номер: CN116260179A
Автор: XU JUNTAO, ZHAO RENDE, XUAN CONGCONG, LIU YUANBING, ZHANG CHENGYI, SU HENG, HOU ZHEN, YIN XIAO, HE JINKUI, YAN QINGZENG, HU HUIHUI, HAN CHANGZHONG
Принадлежит:

The invention discloses a direct current bus variable structure double-fed strong excitation converter which is composed of a network side two-level converter, four sets of DAB converters, two sets of series-parallel switching circuits and a rotor side NPC type three-level inverter, and the four sets of DAB converters and the two sets of series-parallel switching circuits jointly input direct current voltage to form two sets of output voltage capable of being switched in a series-parallel mode. The rotor side NPC type three-level inverter is connected to a positive direct current bus and a negative direct current bus of the NPC type three-level inverter, and the rotor side NPC type three-level inverter carries out closed-loop control on the rotor current of the DFIG. According to the forced excitation converter, a variable-structure direct-current bus is constructed by using a dual-active bridge converter and a series-parallel switching circuit, so that the voltage of the rotor-side direct-current ...

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Номер записи: 2
05-11-2014 дата публикации

Heat pump fluorine path system pressure display and control integrated device

Номер: CN104132493A
Автор: LIU LEI, ZHANG YANQIAO, CHEN TAO, HAN CHANGZHONG, GE LIZHONG, ZHI XINGXING, ZHANG BIN, XIAO NA
Принадлежит:

The invention discloses a heat pump fluorine path system pressure display and control integrated device which comprises a four-way valve, a condenser, an evaporator, a throttler, a compressor and a gas-liquid separator. Two ports of the four-way valve, the compressor and the gas-liquid separator form a series loop. The other two ports of the four-way valve, the condenser, the throttler and the evaporator sequentially form a series loop. A high pressure sensor is mounted between an exhaust port of the compressor and the four-way valve. A low pressure sensor is mounted between the four-way valve and the gas-liquid separator. The high pressure sensor and the low pressure sensor transmit measured system pressure to a main control panel through pressure sensing signal lines. A pressure protection value is written in the main control panel. When the pressure is higher or lower than a set value, an alarm is given, and a host shuts down. According to the heat pump fluorine path system pressure ...

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Номер записи: 3
23-05-2023 дата публикации

Control method of DAB-based H-bridge series-parallel switching type strong excitation converter

Номер: CN116154845A
Автор: XU JUNTAO, ZHAO RENDE, MENG CHAO, LIU YUANBING, ZHANG CHENGYI, SU HENG, HOU ZHEN, YIN XIAO, HE JINKUI, YAN QINGZENG, HU HUIHUI, HAN CHANGZHONG
Принадлежит:

The invention provides a control method for an H-bridge series-parallel switching type strong excitation converter based on a DAB, and the structure of a grid-side converter is the same as that of a conventional two-level voltage source inverter, and the grid-side converter is directly connected with a power grid through an inductor. The rotor side converter is composed of a DAB, an H-bridge module and a switching circuit. According to the technical scheme, in order to solve the problem that induced electromotive force generated by a rotor side during low voltage ride-through of a DFIG is too large, the DAB-based H-bridge series-parallel switching type doubly-fed forced excitation converter is provided according to the idea of constructing the forced excitation converter in order to ensure that the DFIG is always controllable when a power grid breaks down; a DAB + H bridge series-parallel topology is used for replacing a traditional rotor side converter. When the voltage of the power grid ...

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Номер записи: 4