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1. (WO2017035534) REGENERATIVE BRAKING CONTROLLER FOR ELECTRIC MOTORS

Pub. No.:    WO/2017/035534    International Application No.:    PCT/US2016/049295
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Tue Aug 30 01:59:59 CEST 2016
IPC: H02P 3/26
B60L 7/10
H02P 21/00
H02P 27/08
H05K 1/00
Applicants: TEXAS INSTRUMENTS INCORPORATED
TEXAS INSTRUMENTS JAPAN LIMITED
Inventors: MURTHY, Aravind, Samba
MAGEE, David, Patrick
Title: REGENERATIVE BRAKING CONTROLLER FOR ELECTRIC MOTORS
Abstract:
A method (400) of regenerative braking includes providing (401) an electric motor including at least one stator and a rotor, a speed of the rotor, a motor controller that regulates a current level in the stator winding, a power inverter which controls an energy flow to the stator terminal, and an energy storage system (ESS) which exchanges energy with the motor. A battery management circuit is between the power inverter and the ESS, and a processor has an associated memory storing a regenerative braking (RB) algorithm. The RB algorithm during braking causes the motor controller to execute determining (402) an RB torque value from the rotor speed that maximizes regenerative braking current, and the power inverter is used (403) to redirect the RB current to maximize a power transfer from the motor to the ESS.