POWER CONVERTERS, AIR CONDITIONERS, AND REFRIGERATION EQUIPMENT

Abstract

The invention proposes a power conversion device consisting of: a converter configured to convert alternating current, supplied from an alternating current source via the first pair of conductors, into direct current; an inverter configured to convert the direct current output from the converter to the second pair of conductors, into alternating current; and a capacitor connected between the conductors of the first pair of conductors or between the conductors of the second pair of conductors, between one or more inductors and the inverter, where the carrier frequency for controlling the inverter is fc, the resonant frequency of the LC filter composed of one or more inductors and capacitors is ÍLC, and the maximum value of the inverter's output frequency is MAX(f(fb) satisfying 6 times MAX(fb) < fuc < L - 3 times MAX(fb). The invention also proposes an air conditioning and refrigeration device, including the aforementioned electrical power conversion device.