CONVERTER CIRCUIT AND MOTOR DRIVE DEVICE

摘要

PROBLEM TO BE SOLVED: To generate a voltage equal to or higher than an input voltage without using a reactor and a capacitor having a large capacity in a converter circuit for converting the output voltage of an AC power source 1.

SOLUTION: The converter circuit 100 for converting the output of the AC power source 1 includes a rectifying circuit 20 for rectifying the output voltage of the AC power source 1; first and second capacitors 31, 32 of a series connection for smoothing the output of the rectifying circuit 20; and a switch circuit 40 for switching the connection of both the capacitors 31 and 32 and the AC power source, so that the output voltage of the AC power source 1 is alternately repeatedly applied to the first and second capacitors 31 and 32 in a shorter period than that of the AC power source.

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