Patent ID: 6324080
Filing Date: 2001-11-27
Classification: H02M,Y02B

Abstract:
Apparatus for converting DC voltage to AC voltage comprising:an inverter for receiving DC voltage and providing unfiltered AC voltage at an operating frequency, said inverter having transistors operable between conductive and nonconductive states;filtering means for filtering said AC voltage, said filtering means having at least one resonant circuit formed of a capacitor and a first inductor connected in parallel and possessing a first resonant frequency determined by the values of said capacitor and said first inductor with said first resonant frequency being different from said operating frequency;means for measuring current flowing in said filtering means through said first inductor; andcomparator means responsive to the amplitude of said current to provide an output signal for switching at least one of said transistors from its nonconductive state to its conductive state at a pre-selected time period.