Control system for dynamic current limits on a rotating electrical machine
AssigneeBorgWamer Inc.
InventorsCaleb Wayne Secrest, Siddharth Ballal
Life of this patent
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Abstract
A control system for generating a modified torque command for a rotating electrical machine in a battery electric vehicle (BEV) includes a microprocessor, capable of reading executable commands stored in non-volatile memory, configured to electrically connect to an inverter, determine a rated maximum current of the rotating electrical machine, receive sensor input indicating a temperature or estimating the temperature of at least one portion of the BEV, output a modified maximum current based on the received sensor input, and generate a torque command to the rotating electrical machine based on the modified maximum current.
Claims18
A control system for generating a modified torque command for a rotating electrical machine in a battery electric vehicle (BEV), comprising:
- a microprocessor, capable of reading executable commands stored in non-volatile memory, configured to electrically connect to an inverter, determine a rated maximum current of the rotating electrical machine, receive sensor input indicating a temperature or estimating the temperature of at least one portion of the BEV, output a modified maximum current that exceeds a rated maximum current and a duration for operating at the modified maximum current based on the received sensor input indicating the temperature or the estimated temperature, and generate a torque command to the rotating electrical machine based on the modified maximum current.
A control system for generating a modified torque command for a rotating electrical machine in a battery electric vehicle (BEV), comprising:
- a microprocessor, capable of reading executable commands stored in non-volatile memory, configured to electrically connect to an inverter, including a power loss modeling block that determines at least one power loss of the rotating electrical machine, a thermal modeling block that monitors at least one temperature at the BEV, and a maximum phase determination block that determines a rated maximum current of the rotating electrical machine and modifies the rated maximum current, based on the at least one temperature, to generate a modified maximum current exceeding a rated maximum current and a duration for operating at the modified maximum current, used to generate a torque command to the rotating electrical machine.
A method of generating a modified torque command for a rotating electrical machine in a battery electric vehicle (BEV), comprising the steps of:
- (a) determining a rated maximum current of the rotating electrical machine;
- (b) receiving sensor input indicating a temperature or estimating the temperature of at least one portion of the BEV;
- (c) outputting a modified maximum current that exceeds the rated maximum current of the rotating electrical machine and a duration for operating at the modified maximum current based on the received sensor input indicating the temperature or the estimated temperature;
- and
- (d) generating a torque command to the rotating electrical machine based on the modified maximum current.
Dependencies are inferred from the claim text.