Borgwarner Inc.

Hassan H Eldeeb

Siddharth Ballal

Caleb Wayne Secrest

Chikezie M Emeghara

James Smith

Ujjwal Kumar

Ronald J Krefta

A method of operating a power inverter for an electric machine includes selecting an inverter switching technique; determining a frequency range for inverter switching; determining a direct current (DC) voltage range for inverter switching; determining an optimal switching map including an inverter switching technique and frequency selection for each value of torque-speed on a torque-speed curve; and controlling switches included in the power inverter using the optimal switching map.

Optimization of switching frequency and pulse width modulation technique for traction power inverters

A control system configured to control an electric motor of an electric vehicle (EV) includes a current sensor offset detector that determines an offset of one or more current sensors; a gain compensator that determines a second order harmonic component in d- and q-axis currents due to gain errors in one or more sensors; and a controller that generates a control signal that compensates for the offset or gain error mismatch of the current sensor(s).

Control system for compensating for current sensor offset/gain errors

A control system for generating a torque command for an electric motor carried by an electric vehicle (EV) including a motion observer configured to receive an angular position of an output shaft of the electric motor and an ideal torque command and output an estimated disturbance torque value; and a controller configured to receive the estimated disturbance torque value as well as output a harmonic disturbance torque value.

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Carmel, IN, United States of America

Hassan H Eldeeb