Patent ID: 7929323
Filing Date: 2011-04-19
Classification: H02M

Abstract:
1. A power converter, comprising: an input to receive AC electrical input power; an output to provide DC electrical output power; a rectifier operatively coupled with the input and the output and operative to convert the input power to provide DC electrical power at the output; a pre-charge circuit, comprising: a feedback system operative to measure a DC voltage associated with the output and to provide a feedback signal indicative of the measured DC voltage; and a controller receiving the feedback signal from the feedback system and providing a pre-charge control signal to the switching device to selectively operate the pre-charge circuit in a pre-charge mode with the switching device operated in a first mode during startup of the converter; and a pre-charge diagnosis system operatively coupled with the controller to selectively detect at least one converter fault based at least partially on the feedback signal during startup and to selectively discontinue application of power to the input and place the converter in a fault state based on detected faults.