Patent ID: 7391180
Filing Date: 2008-06-24
Classification: B60K,F02N,H02P,Y02T,Y10S

Abstract:
1. A pulse width modulation (PWM) control circuit for a polyphase electrical machine, wherein the electrical machine is equipped with a multiphase stator and a rotor, the control circuit comprising: a reversible AC-DC current inverter circuit comprising two continuous supply terminals and controlled terminals each to be connected to at least one phase of the stator of the electrical machine; a plurality of sensors configured to measure at least one of a current and a voltage in each phase of said electrical machine; at least one sensor of the plurality of sensors for producing instantaneous information on a position and a speed of rotation of the rotor of the electrical machine; a pilot circuit configured to receive information depending on measurements provided by the plurality of sensors and to control the AC-DC current inverter circuit using the received information; and signal generator circuit for configuration of the pilot circuit, said signal generator circuit configured to deliver at least one signal selected from a group consisting of first signals, second signals, third signals, fourth signals, and fifth signals, wherein the first signals are for enabling the electrical machine to operate as a starter, the second signals are for enabling the electrical machine to operate as an electric drive motor, the third signals are for enabling the electrical machine to operate as an electric reinforcement motor, the fourth signals are for enabling the electrical machine to operate as an alternator, and the fifth signals are for enabling the electrical machine to operate as an alternator recovering mechanical breaking energy.