SYSTEM AND METHOD FOR CONTROLLING TRACTION

A traction control system for a machine having an electric drive configuration is disclosed. The fraction control system includes an electric motor associated with at least one wheel and adapted to provide braking torque to the wheel. The control system further includes a controller configured to determine a rotational speed of the at least one wheel, compare the rotational speed to an allowable slide threshold, and adjust the braking torque to the at least one wheel during retarding if the speed is less than the allowable slide threshold. 1. A traction control system for a machine having an electric drive configuration , comprising:an electric motor associated with at least one wheel and adapted to provide braking torque to the wheel; and determine a rotational speed of the at least one wheel;', 'compare the rotational speed to an allowable slide threshold; and', 'adjust the braking torque to the at least one wheel during retarding if the speed is less than the allowable slide threshold., 'a controller configured to2. The traction control system of claim 1 , wherein the allowable slide threshold is based on a ground speed of the machine.3. The traction control system of claim 2 , wherein the allowable slide threshold is a percentage of the ground speed of the machine.4. The traction control system of claim 3 , wherein the allowable slide threshold is ninety percent of the measured ground speed of the machine.5. The traction control system of claim 1 , further including at least one mechanical brake associated with the at least one wheel claim 1 , wherein the mechanical brake is adapted to provide braking torque to the wheel.6. The traction control system of claim 5 , wherein the controller is further configured to:adjust the electric motor to apply a first portion of the braking torque to the at least one wheel during retarding; andadjust the mechanical brake to provide a second portion of the braking torque to the at least one wheel during retarding until the ...

Torque Control Based on Rotor Resistance Modeling in Induction Motors

A control system for an induction motor executes an on-board, dynamic model to estimate rotor resistance and control the torque output by the induction motor. The model includes equations to calculate stator and rotor temperatures and/or resistances based on combinations of voltage and current data, electrical frequency, rotor speed, switching patterns, and air flow rates during operation of the induction motor. The control system updates the model based on feedback collected during the operation of the induction motor, including the difference between the actual observed stator temperature and the stator temperature predicted by the model. The model is updated to converge the predicted stator temperature on the actual observed stator temperature, and corresponding updates are made to the rotor resistance estimations to provide more accurate estimations of the rotor resistance and improve the accuracy of the induction motor torque output. 1. A control system for an induction motor , comprising:a plurality of sensors connectable to the induction motor, the plurality of sensors including a stator temperature sensor and one or more additional sensors;one or more central processing units (CPUs) in communication with the plurality of sensors; and receiving sensor data from the one or more additional sensors during operation of the induction motor;', 'determining a predicted temperature of a stator of the induction motor based at least in part on the sensor data from the one or more additional sensors;', 'receiving an observed temperature of the stator from the stator temperature sensor;', 'determining a difference between the predicted temperature and the observed temperature of the stator;', 'determining a resistance of a rotor of the induction motor based at least in part on the difference between the predicted temperature and the observed temperature of the stator; and', 'controlling a torque output the induction motor based at least in part on the resistance of the ...

METHOD OF CONTROLLING ENGINE SPEED

A method of controlling an engine speed of a machine is provided. The method includes determining if an engine power demand is below a rated engine power. The method further includes determining if a drive motor of the machine is operating within a constant power region. The method also includes comparing an available engine power with the engine power demand. The method further includes changing the engine speed such that an available engine power is greater than the engine power demand by a predetermined margin. 1determining if an engine power demand is below a rated engine power;determining if a drive motor of the machine is operating within a constant power region;comparing an available engine power with the engine power demand; andchanging the engine speed such that an available engine power is greater than the engine power demand by a predetermined margin.. A method of controlling an engine speed of a machine, the method comprising: The present disclosure relates to an engine, and more particularly to a method of controlling an engine speed.Machines, such as off-highway trucks and on-highway trucks, are well known in the art. Such machines include an engine for generating power. Further, in such machines, a turbocharger provides air to the engine in order to increase a power output. The power output of the engine generally varies with engine speed.The engine is typically provided with a minimum engine speed while the machine is being driven. The minimum engine speed is set in order to prevent surging in the turbochargers and to enable improved acceleration from rest. However, operating the engine at the minimum engine speed, during partial load conditions, may reduce a fuel efficiency of the engine.In one aspect of the disclosure, a method of controlling an engine speed of a machine is provided. The method includes determining if an engine power demand is below a rated engine power. The method further includes determining if a drive motor of the machine is ...

System and method for energy management for electric drive system

The present disclosure is related to a method for energy management for an electric drive system during regenerative braking of a machine. The machine includes an electric drive assembly. The electric drive assembly includes a generator, a motor, a primary direct current bus and a secondary direct current bus having a regenerative brake assembly. The method of energy management includes connecting at least a chopper and a crowbar across the secondary direct current bus. Further, the method includes directing a secondary power stored during regenerative braking, from the primary or secondary or both the buses through the chopper or the crowbar during fault condition.

Emergency power supply

According to the present invention, an emergency power supply to be coupled to an electric power source providing an incoming AC signal may include an input/output terminal, a battery with a DC voltage, a rectifier coupled directly to the input/output terminal and connected to the battery, an inverter coupled directly to the input/output terminal and connected to the battery, and a control circuit coupled to the rectifier and the inverter so that in a first operational mode the rectifier is coupled to the battery to rectify an incoming AC signal at the input/output terminal to charge the battery and the inverter is decoupled from the battery, and in a second operational mode the inverter is coupled to the battery to invert the DC voltage to provide an outgoing AC signal at the input/output terminal and the rectifier is decoupled from the battery.

Emergency power supply

Detecting ground fault location

A technique and system for detecting a location of a ground fault in an electrical system are provided. The technique and system include steps or components for determining a ground fault voltage, receiving a gate control signal associated with an electric load, comparing the ground fault voltage to the gate control signal, and determining whether the ground fault is located at the electric load based on the comparison of the ground fault voltage to the gate control signal.

System and method for controlling traction

System and method for controlling traction

A traction control system for a machine (100) having an electric drive (102) configuration is disclosed. The traction control system includes an electric motor (116, 118) associated with at least one wheel (105. 106) and adapted to provide braking torque to the wheel (105, 106). The control system further includes a controller configured to determine a rotational speed of the at least one wheel (105, 106), compare the rotational speed to an allowable slide threshold, and adjust the braking torque to the at least one wheel (105, 106) during retarding if the speed is less than the allowable slide threshold.

Method to determine fuse health

A method of monitoring a fuse of a work machine includes sensing a fuse current; detecting when the fuse current exceeds a threshold; quantifying a difference current that is a difference between the fuse current and the threshold current when the fuse current exceeds the threshold current; determining an amount of time that the difference current is greater than zero; and generating an alert related to fuse lifetime according to the difference current and determined time.

Charge-port capture detection mechanism for battery electric vehicle

The disclosure describes technology that includes a charge-port (302) capture detection mechanism (400), which has a mounting base (404) and a capture gate (402). The mounting is connectable to a battery electric vehicle (BEV) (400) at a location adjacent to a high-voltage, direct current (HVDC) charge-port (302). The capture gate (402) is movably attached to the mounting base (404), the capture gate (402) being moveable, relative to the mounting base (404), between a closed position in which the capture gate (402) captures a charge connector (108) of a charging cable (102) engaged in the HVDC charge-port (302) and an open position.

Method to determine fuse health

A method of monitoring a fuse of a work machine includes sensing a fuse current; detecting when the fuse current exceeds a threshold; quantifying a difference current that is a difference between the fuse current and the threshold current when the fuse current exceeds the threshold current; determining an amount of time that the difference current is greater than zero; and generating an alert related to fuse lifetime according to the difference current and determined time.

System and method for initializing operations of lithium-ion battery packs

A system (140; 340) for initializing operations of one or more batteries (156) of a lithium-ion battery pack (136) to supply electric power to an electrical load (132) includes a switching device (168), an output device (172), and a controller (176). The switching device (168) is configured to move between a first position to facilitate supply of electric power from the batteries to the electrical load (132) and a second position to restrict supply of electric power from the batteries to the electrical load (132). The output device (172) is configured to be activated to indicate an availability of the batteries (156) to supply electric power to the electrical load (132). The controller (176) receives an input, actuates a contactor (164) associated with at least one battery (156) to facilitate electrical connection between the at least one battery (156) and the electrical load (132), and moves the switching device (168) to the first position to cause an activation of the output device (172) in response to the actuation of the contactor (164).

Cell balancing strategy for a battery

A method of cell balancing for a battery comprising a plurality of cells. The method comprises determining a cell balancing strategy based on at least one of a cell chemistry of the battery; an expected use cycle of the battery; and a first state of the battery, wherein the first state is a detected state of the battery. The method further comprises discharging one or more cells according to the cell balancing strategy when the battery is in a second state, wherein the second state is a detected state of the battery. The cell balancing strategy is configured to discharge one or more of the plurality of cells such that a balancing parameter of each cell being discharged reaches a threshold value. The balancing parameter comprises at least one of a voltage; a state of charge; and a voltage difference.

Kompensation einer veränderlichen zwischenkreisspannung bei schätzung derleistung eines geschalteten reluktanzmotors

Ein Regelungssystem (200) für einen geschalteten Reluktanzmotor (SR-Motor) (206) weist eine Gleichstromquelle (202) und einen Stromrichter (204) auf. Das Regelungssystem (200) weist eine Benutzerschnittstelle auf, die dafür eingerichtet ist, einem Bediener zu ermöglichen, eine Soll-Drehmomentabgabe vorzugeben. Überdies weist das Regelungssystem (200) einen Regler (216) auf, der aus dem Wechselstrom (AC), der dem SR-Motor (206) vom Stromrichter (204) zugeführt wird, einen Gleichstrom umwandelt. Anhand der Gleichspannung, die dem Stromrichter (204) von der Gleichstromquelle (202) zugeführt wird, und des umgewandelten Gleichstroms schätzt der Regler (216) die Ist-Leistungsabgabe des SR-Motors (206). Anhand der Ist-Leistungsabgabe und der Drehzahl des SR-Motors (206) schätzt der Regler (216) die Ist-Drehmomentabgabe. Um die Drehmomentabweichung zu ermitteln, vergleicht der Regler (216) die Ist-Drehmomentabgabe und die Soll-Drehmomentabgabe. Der Regler (216) stellt eine Drehmomentabgabebegrenzung und die Drehzahl des SR-Motors (206) ein.

Cell balancing strategy for a battery

The cell balancing strategy is determined 110 based on at least one of, a cell chemistry of the battery, an expected use cycle of the battery, and a first state of the battery, wherein the first state is a detected state of the battery. The method further comprises discharging one or more cells according to the cell balancing strategy when the battery is in a second state, wherein the second state is a detected state of the battery. The cell balancing strategy is configured to discharge one or more of the plurality of cells such that a balancing parameter of each cell being discharged reaches a threshold value. The balancing parameter comprises at least one of a voltage, a state of charge, and a voltage difference.

Charge-port capture detection mechanism for battery electric vehicle

The disclosure describes technology that includes a charge-port capture detection mechanism, which has a mounting base and a capture gate. The mounting is connectable to a battery electric vehicle (BEV) at a location adjacent to a high-voltage, direct current (HVDC) charge-port. The capture gate is movably attached to the mounting base, the capture gate being moveable, relative to the mounting base, between a closed position in which the capture gate captures a charge connector of a charging cable engaged in the HVDC charge-port and an open position.

Charge-port capture detection mechanism for battery electric vehicle

The disclosure describes technology that includes a charge-port (302) capture detection mechanism (400), which has a mounting base (404) and a capture gate (402). The mounting is connectable to a battery electric vehicle (BEV) (400) at a location adjacent to a high-voltage, direct current (HVDC) charge-port (302). The capture gate (402) is movably attached to the mounting base (404), the capture gate (402) being moveable, relative to the mounting base (404), between a closed position in which the capture gate (402) captures a charge connector (108) of a charging cable (102) engaged in the HVDC charge-port (302) and an open position.

Switched reluctance motor power estimation compensation for variable dc-link voltage

A control system (200) for a switched reluctance (SR) motor (206) includes a Direct Current (DC) power source (202), and an inverter (204). The control system (200) includes a user interface configured to enable an operator to specify a desired torque output. The control system (200) further includes a controller (216) which converts a DC current from the Alternating Current (AC) supplied to the SR motor (206) by the inverter (204). The controller (216) estimates an actual power output generated by the SR motor (206) based on a DC voltage supplied by the DC power source (202) to the inverter (204), and the converted DC current. The controller (216) estimates an actual torque output based on the actual power output and a rotational speed of the SR motor (206). The controller (216) compares the actual torque output and a desired torque output to calculate a torque error. The controller (216) adjusts a torque output limit and the rotational speed of the SR motor (206).

Independent high voltage interlocking loop systems

A machine may a first high voltage interlocking loop (HVIL) system to provide power to one or more components of the machine, the first HVIL system comprising: a plurality of groups of batteries; a plurality of disconnect components connected to the plurality of groups of batteries; a plurality of sets of contactors, a set of contactors, of the plurality of sets of contactors, being connected to a group of batteries of the plurality of groups of batteries. The machine may a second HVIL system to receive power from a power source, the second HVIL system comprising: a port configured to receive a connector of the power source and receive power, from the power source via the connector, to charge the plurality of groups of batteries, wherein the second HVIL system is independent with respect to the first HVIL system.

Switched reluctance motor power estimation compensation for variable DC-link voltage

Switched reluctance motor power estimation compensation for variable DC-link voltage

A control system (200) for a switched reluctance (SR) motor (206) includes a Direct Current (DC) power source (202), and an inverter (204). The control system (200) includes a user interface configured to enable an operator to specify a desired torque output. The control system (200) further includes a controller (216) which converts a DC current from the Alternating Current (AC) supplied to the SR motor (206) by the inverter (204). The controller (216) estimates an actual power output generated by the SR motor (206) based on a DC voltage supplied by the DC power source (202) to the inverter (204), and the converted DC current. The controller (216) estimates an actual torque output based on the actual power output and a rotational speed of the SR motor (206). The controller (216) compares the actual torque output and a desired torque output to calculate a torque error. The controller (216) adjusts a torque output limit and the rotational speed of the SR motor (206).

Method to control multiple parallel battery packs

A method of operating a machine battery system having multiple battery packs connectable in parallel includes bringing a first battery pack with the highest offline pack voltage online for discharging, including a pack controller circuit of the first battery pack bringing one or more individual battery strings of the first battery pack online; bringing a next battery pack with a next highest offline pack voltage online when the next highest offline pack voltage is within a predetermined discharge threshold voltage of a load voltage, including the pack controller circuit bringing one or more individual battery strings of the next battery pack online; and waiting to bring the next battery pack online, when the next highest offline pack voltage is less than a predetermined discharge threshold voltage of the load voltage, until the next highest offline pack voltage is within the predetermined discharge threshold voltage.

Independent high voltage interlocking loop systems

A machine may a first high voltage interlocking loop (HVIL) system to provide power to one or more components of the machine, the first HVIL system comprising: a plurality of groups of batteries; a plurality of disconnect components connected to the plurality of groups of batteries; a plurality of sets of contactors, a set of contactors, of the plurality of sets of contactors, being connected to a group of batteries of the plurality of groups of batteries. The machine may a second HVIL system to receive power from a power source, the second HVIL system comprising: a port configured to receive a connector of the power source and receive power, from the power source via the connector, to charge the plurality of groups of batteries, wherein the second HVIL system is independent with respect to the first HVIL system.

Method to control multiple parallel battery packs

A method of operating a machine battery system having multiple battery packs connectable in parallel includes bringing a first battery pack with the highest offline pack voltage online for discharging, including a pack controller circuit of the first battery pack bringing one or more individual battery strings of the first battery pack online; bringing a next battery pack with a next highest offline pack voltage online when the next highest offline pack voltage is within a predetermined discharge threshold voltage of a load voltage, including the pack controller circuit bringing one or more individual battery strings of the next battery pack online; and waiting to bring the next battery pack online, when the next highest offline pack voltage is less than a predetermined discharge threshold voltage of the load voltage, until the next highest offline pack voltage is within the predetermined discharge threshold voltage.

Unabhängige hochspannungs-verriegelungsschleifensysteme

Eine Maschine kann ein erstes Hochspannungs-Verriegelungsschleifensystem (HVII,-System) aufweisen, um eine oder mehrere Komponenten der Maschine mit Leistung zu versorgen, wobei das erste HVIL-System umfasst: eine Vielzahl von Batteriegruppen; eine Vielzahl von mit der Vielzahl von Batteriegruppen verbundenen Trennkomponenten; eine Vielzahl von Schützensätzen, wobei ein Schützensatz der Vielzahl von Schützensätzen mit einer Batteriegruppe der Vielzahl von Batteriegruppen verbunden ist. Die Maschine kann ein zweites HVIL-System zum Empfangen von Leistung von einer Energiequelle aufweisen, wobei das zweite HVIL-System umfasst: einen zum Aufnehmen eines Verbinders der Energiequelle und zum Empfangen von Leistung von der Energiequelle über den Verbinder ausgelegten Anschluss, um die Vielzahl von Batteriegruppen zu laden, wobei das zweite HVIL-System unabhängig in Bezug auf das erste HVIL-System ist.

A method to control multiple parallel battery packs

A method of operating a machine battery system having multiple battery packs connectable in parallel includes bringing a first battery pack with the highest offline pack voltage online for discharging, including a pack controller circuit of the first battery pack bringing one or more individual battery strings of the first battery pack online; bringing a next battery pack with a next highest offline pack voltage online when the next highest offline pack voltage is within a predetermined discharge threshold voltage of a load voltage, including the pack controller circuit bringing one or more individual battery strings of the next battery pack online; and waiting to bring the next battery pack online, when the next highest offline pack voltage is less than a predetermined discharge threshold voltage of the load voltage, until the next highest offline pack voltage is within the predetermined discharge threshold voltage.

Verfahren und Steuerung mehrerer paralleler Batteriepacks

Ein Verfahren zum Betreiben eines Maschinenbatteriesystems mit mehreren parallel schaltbaren Batteriepacks beinhaltet das Online-Bringen eines ersten Batteriepacks mit der höchsten Offline-Packspannung zum Entladen, einschließlich einer Packsteuerungsschaltung des ersten Batteriepacks, die einen oder mehrere einzelne Batteriestränge des ersten Batteriepacks online bringt; das Online-Bringen eines nächsten Batteriepacks mit einer nächsthöheren Offline-Packspannung, wenn die nächsthöhere Offline-Packspannung innerhalb einer vorbestimmten Entladeschwellenspannung einer Lastspannung liegt, einschließlich der Packsteuerungsschaltung, die einen oder mehrere einzelne Batteriestränge des nächsten Batteriepacks online bringt; und das Warten mit dem Online-Bringen des nächsten Batteriepacks, wenn die nächsthöhere Offline-Packspannung kleiner als eine vorbestimmte Entladeschwellenspannung der Lastspannung ist, bis die nächsthöhere Offline-Packspannung innerhalb der vorbestimmten Entladeschwellenspannung liegt.

A method to control multiple parallel battery packs

A method of operating a machine battery system having multiple battery packs connectable in parallel includes bringing a first battery pack with the highest offline pack voltage online for discharging, including a pack controller circuit of the first battery pack bringing one or more individual battery strings of the first battery pack online; bringing a next battery pack with a next highest offline pack voltage online when the next highest offline pack voltage is within a predetermined discharge threshold voltage of a load voltage, including the pack controller circuit bringing one or more individual battery strings of the next battery pack online; and waiting to bring the next battery pack online, when the next highest offline pack voltage is less than a predetermined discharge threshold voltage of the load voltage, until the next highest offline pack voltage is within the predetermined discharge threshold voltage.

Hydraulic fracturing pump control system

A monitor and control system for a hydraulic fracturing pump is described herein to reduce or eliminate harmful oscillations in fluid discharge pressure caused by the pump load dynamics. The monitor and control system receives various sensor data from the operation of the pump, including the pump crank position, and executes a pump control equation or model based on the pump sensor data, pump load data and/or pump speed data. Pump control equations or models are specific to the design and dynamic operation of the pump, incorporating the number of plungers, pump dynamics, motor lag and motor dynamics, etc. Using the pump control equations or models, the monitor and control system determines control commands for the pump motor to reduce or eliminate the oscillatory discharge pressure at the pump.

Detection of battery pack mis-assembly

In some implementations, a controller may provide first instructions to a plurality of measurement devices, wherein the plurality of measurement devices are configured to obtain measurements from a plurality of battery modules of a battery pack. The controller may receive one or more first responses from one or more first measurement devices of the plurality of measurement devices based on providing the first instructions, wherein the one or more first responses include first unique identifier information identifying one or more first unique identifiers associated with the one or more first measurement devices. The controller may determine, based on the one or more first unique identifiers, whether the plurality of battery modules are improperly assembled.

Detection of battery pack mis-assembly

In some implementations, a controller may provide first instructions to a plurality of measurement devices, wherein the plurality of measurement devices are configured to obtain measurements from a plurality of battery modules of a battery pack. The controller may receive one or more first responses from one or more first measurement devices of the plurality of measurement devices based on providing the first instructions, wherein the one or more first responses include first unique identifier information identifying one or more first unique identifiers associated with the one or more first measurement devices. The controller may determine, based on the one or more first unique identifiers, whether the plurality of battery modules are improperly assembled.

System und verfahren zur initialisierung des betriebs von lithium-ionen-batteriepacks

Ein System (140; 340) zur Initialisierung von Operationen einer oder mehrerer Batterien (156) eines Lithium-Ionen Batteriepacks (136) zum Zuführen elektrischer Leistung zu einem elektrischen Verbraucher (132) beinhaltet eine Schaltvorrichtung (168), eine Ausgabevorrichtung (172), und eine Steuerung (176). Die Schaltvorrichtung (168) ist zum Bewegen zwischen einer ersten Position zum Ermöglichen der Zuführung von elektrischer Leistung von den Batterien zu dem elektrischen Verbraucher (132) und einer zweiten Position zum Begrenzen der Zuführung von elektrischer Leistung von den Batterien zu dem elektrischen Verbraucher (132) ausgelegt. Die Ausgabevorrichtung (172) ist zur Aktivierung ausgelegt, um eine Verfügbarkeit der Batterien (156) zur Zuführung von elektrischer Leistung an den elektrischen Verbraucher (132) anzugeben. Die Steuerung (176) empfängt eine Eingabe, betätigt einen zumindest einer Batterie (156) zugeordneten Schütz (164), um eine elektrische Verbindung zwischen der zumindest einen Batterie (156) und dem elektrischen Verbraucher (132) zu ermöglichen, und bewegt die Schaltvorrichtung (168) in die erste Position, um eine Aktivierung der Ausgabevorrichtung (172) in Reaktion auf die Betätigung des Schützes (164) zu bewirken.

Battery module monitoring and repurposing

In some implementations, a module controller may obtain one or more values of one or more parameters associated with one or more battery cells included in the battery module. The module controller may store the one or more values of the one or more parameters associated with the one or more battery cells. The module controller may provide, to a controller of a battery pack, an indication of the one or more values of the one or more parameters.

Battery module monitoring and repurposing

In some implementations, a module controller (110) may obtain one or more values of one or more parameters associated with one or more battery cells (106) included in the battery module (104). The module controller (110) may store the one or more values of the one or more parameters associated with the one or more battery cells (106). The module controller (110) may provide, to a controller of a battery pack (100), an indication of the one or more values of the one or more parameters.

Switched reluctance motor power estimation compensation for variable DC-link voltage

A control system for a switched reluctance (SR) motor includes a Direct Current (DC) power source, and an inverter. The control system includes a user interface configured to enable an operator to specify a desired torque output. The control system further includes a controller which converts a DC current from the Alternating Current (AC) supplied to the SR motor by the inverter. The controller estimates an actual power output generated by the SR motor based on a DC voltage supplied by the DC power source to the inverter, and the converted DC current. The controller estimates an actual torque output based on the actual power output and a rotational speed of the SR motor. The controller compares the actual torque output and a desired torque output to calculate a torque error. The controller adjusts a torque output limit and the rotational speed of the SR motor.

Braking management in a dual braking system

A system for managing braking torque in a machine uses a first braking system, a second braking system that is independent of the first braking system and a controller that monitors activity in both braking systems. The controller selectively reduces torque in the first braking system as torque in the second braking system increases to limit undesired effects of possible over-braking.