Patent ID: 9083244
Filing Date: 2015-07-14
Classification: H02M,H02P,H05K

Abstract:
1. A power conversion apparatus that is configured to convert input direct current power or alternating current power into desired alternating current power by a switching operation performed by a switching element, to output the desired alternating current power, and to cool the switching element by using a boiling-refrigerant-type cooling device that uses a boiling phenomenon of a refrigerant included therein, the power conversion apparatus comprising a control unit that controls the switching element by generating a gate command capable of stabilizing boiling of the refrigerant, wherein the control unit includes a modulation-mode selection unit that determines stability of the cooling device based on an element-temperature estimation value that is an estimated temperature of the switching element, and that decides and selects a modulation mode for controlling the switching element based on a determination result, and a gate-command generation unit that generates the gate command based on the modulation mode selected by the modulation-mode selection unit.