Invention Grant
- Patent Title: Torque capability optimization under active limiting of regenerative current in synchronous motor drives
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Application No.: US17496226Application Date: 2021-10-07
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Publication No.: US11616457B2Publication Date: 2023-03-28
- Inventor: Nakul Shah , Prerit Pramod , Krishna MPK Namburi
- Applicant: Steering Solutions IP Holding Corporation
- Applicant Address: US MI Saginaw
- Assignee: Steering Solutions IP Holding Corporation
- Current Assignee: Steering Solutions IP Holding Corporation
- Current Assignee Address: US MI Saginaw
- Agency: Dickinson Wright PLLC
- Main IPC: H02P6/08
- IPC: H02P6/08 ; H02P27/08 ; H02P25/022

Abstract:
A method of controlling operation of an electric machine includes: determining a voltage-based torque limit based on a voltage constraint of a direct current (DC) bus supplying power to an inverter for powering the electric machine; determining a motor current-based torque limit based on a motor current limit; determining a final torque limit based on the voltage-based torque limit and the motor current-based torque limit; determining a limited command torque based on a torque command and the final torque limit; determining an initial current command corresponding to the inverter satisfying a regenerative current limit of the DC bus; and calculating a final current command based on, at least, the limited command torque and the initial current command. The method includes the final current command exceeding the initial current command to cause the electric machine to produce a torque corresponding to the limited torque command.
Public/Granted literature
- US20220109386A1 TORQUE CAPABILITY OPTIMIZATION UNDER ACTIVE LIMITING OF REGENERATIVE CURRENT IN SYNCHRONOUS MOTOR DRIVES Public/Granted day:2022-04-07
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