Patent ID: 8107269
Filing Date: 2012-01-31
Classification: H02M

Abstract:
1. An apparatus to convert a direct current to an alternating current, comprising: a power module disposed between an input terminal of the direct current and output terminal of the alternating current, the power module comprising an on/off switch element; a first smoothing condenser connected in parallel with the power module; a second smoothing condenser connected in parallel with the power module; the second smoothing condenser comprising an electrostatic capacity less than the first smoothing condenser; a first wiring connecting the power module and the first smoothing condenser; and a second wiring connecting the power module and the second smoothing condenser, the second wiring comprising an inductance greater than the first wiring, wherein the second wiring is configured such that a resonance frequency of the first condenser is substantially similar to a resonance frequency of the second condenser.