Patent ID: 9190896
Filing Date: 2015-11-17
Classification: B60L,H02M,H02P,Y02T

Abstract:
1. A system, comprising: an inverter circuit configured to provide a first phase current to a first stator winding of a permanent magnet synchronous machine (PMSM), a second phase current to a second stator winding of said PMSM, and a third phase current to a third stator winding of said PMSM; a pulse width modulation (PWM) strategy module (PSM) configured to implement a loss reduction strategy to decrease conduction loss at said inverter circuit, said PSM comprising a status determination module configured to detect a rotor-lock condition of said PMSM, a PWM strategy control module configured to control implementation of a PWM loss reduction strategy for said inverter circuit and reduce conduction loss at said inverter circuit during a rotor-lock condition, and a shift signal module configured to provide a shift signal for modifying a modulation signal used in combination with a PWM carrier signal; and wherein said PWM strategy control module is configured to implement said loss-reduction strategy and said shift signal module is configured to provide said shift signal for combination with said modulation signal to provide a shifted modulation signal to be compared with said PWM carrier signal to produce shifted PWM control signals for said inverter circuit.