Power system for parallel operation of AC/DC convertrs

Abstract

A plurality of AC/DC converters connected in parallel, are provided in which any one of the power converters can fail with-out affecting the operation of the machine which the plurality of converters are providing power. The failed AC/DC converter can be removed and replaced by another converter without shutting down the system. The output voltage of each converter is sensed on the power supply side of a decoupling diode. This allows each one of the converters to operate with its own sense loop and, therefore, the feedback loop does not open when a converter is removed and another used in its place. Each of the parallel connected AC/DC converters is designed to provide a preset maximum power which is independent of AC line voltage variation. To limit the power, the control voltage is made inversely proportional to the average input AC line voltage. The output voltage of the AC/DC converter is made to vary as a function of the load. This allows all the converters in parallel to provide power to the load all the time.

Dependencies are inferred from the claim text.