BOOST CIRCUIT, MOTOR DRIVING MODULE, AND REFRIGERATING APPARATUS

摘要

An object of the present invention is to provide a boost circuit, a motor driving module, and a refrigerating apparatus that detect the current of each power device using one current detection device, and adjust the on width of each power device to substantially equalize the current of each power device. The present invention provides a boost circuit including: a rectifying circuit 2 connected to an AC power source 1; a plurality of reactors that are connected in parallel to the positive electric potential side of the rectifying circuit 2; a plurality of power devices 6a, 6b that are connected in series to the plurality of reactors to turn on or off current; a single resistor that is connected between the plurality of power devices and the negative electric potential side of the rectifying circuit; and a control unit 12 that determines from which of the plurality of power devices 6a, 6b the current flowing to the single current detection resistor 9 has come, and alternately controls the plurality of power devices 6a, 6b so that the current flowing to the plurality of power devices 6a, 6b is substantially equalized.