Importance

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Abstract

An inverter circuit includes a pair of switching devices coupled in series across high and low sides of a direct current bus. An output line is coupled between the devices for conducting controlled alternating current power produced by timed switching of the devices. A flyback diode is electrically coupled a in parallel with each switching device and is physically positioned adjacent to the opposite switching device in the pair. Conducting paths between each diode and the associated switching device are preferably physically positioned adjacent to conducting paths between the switching devices and the output line. The placement of the elements cancels or reduces parasitic inductance during switching. Three similar arrangements may be provided in parallel in a three phase inverter. The inverter may be incorporated into a power substrate including a rectifying circuit for converting alternating current power to direct current power to be applied to the bus.

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First Claim