Patent ID: 8853990
Filing Date: 2014-10-07
Classification: H02P

Abstract:
1. An inverter device which drives a multiphase rotating electrical machine having a variable number of rotations using a switching element provided for each phase, comprising: a frequency setting unit determining and setting a carrier frequency of a carrier signal for use in driving the switching element for each phase depending on a state of each phase of the rotating electrical machine for each specified electrical angle, the specified electrical angle determined by equally dividing one rotation of an electrical angle, wherein the determination and setting of the carrier frequency is conducted each time the electrical angle changes by the specified electrical angle; and a signal generation unit generating a drive signal for drive of the switching element of each phase using the carrier signal of the carrier frequency set for each phase by the frequency setting unit, wherein the carrier frequency of each phase is an integral multiple of a phase voltage frequency at the specified electrical angle.