Patent ID: 8624534
Filing Date: 2014-01-07
Classification: H02P

Abstract:
1. A control device for an electric motor driving apparatus, which performs control on an electric motor driving apparatus including a system voltage generation unit for generating a direct current system voltage and a direct current-alternating current conversion unit for converting the system voltage into an alternating current voltage having a plurality of mutually deviating phases and supplying the alternating current voltage to an alternating current electric motor, comprising: a switching control unit for performing rectangular wave control in which a plurality of switching elements provided in the direct current-alternating current conversion unit are ON/OFF-controlled to output rectangular wave-shaped voltages of a plurality of phases, wherein when the system voltage varies during execution of the rectangular wave control, the switching control unit performs rectangular wave width adjustment control to set ON/OFF timings of the plurality of switching elements on the basis of a rate of change of the system voltage such that time-integrated values of the rectangular wave-shaped voltages of the respective phases within a control period set at a length corresponding to an integral multiple of a single electrical angle period are substantially identical among the respective phases.