Patent ID: 7679310
Filing Date: 2010-03-16
Classification: B60L,H02P,Y02T

Abstract:
1. A method for controlling a power inverter coupled to an electric motor in an electric drive system of an automobile, the method comprising: controlling the power inverter with a discontinuous pulse width modulated (DPWM) signal to generate a modulated voltage waveform for driving the electric motor, responsive to either a commanded torque of the electric motor being above a first torque level, or a commanded speed of the electric motor being above a first speed level; and controlling the power inverter with a continuous pulse width modulated (CPWM) signal to generate the modulated voltage waveform for driving the electric motor, responsive to both a commanded torque of the electric motor being below the first torque level, and a commanded speed of the electric motor being below the first speed level.