Apparatus, system, and method for a low cost self-healing...

Details Apparatus, system, and method for a low cost self-healing... Apparatus, system, and method for a low cost self-healing...

2007-12-28

2009-10-13

Nguyen, Matthew V (Department: 2838)

Electric power conversion systems

Current conversion

Including automatic or integral protection means

C361S018000

Reexamination Certificate

active

07602623

ABSTRACT:
An apparatus, system, and method are disclosed for a low cost self-healing power supply. The invention includes a power supply that regulates a direct current (“DC”) regulated bus to maintain a regulated bus voltage under varying load conditions. The power supply includes at least one pulse-width modulated stage, wherein each pulse-width modulated stage includes at least two switches connected in parallel. Each switch includes a fuse connected in series with the switch that disconnects the switch in response to an over current condition sufficient to open the fuse.The power supply also includes a pulse-width modulator for each stage of the power supply that regulates a bus voltage controlled by the stage by sensing the controlled bus voltage and adjusting a switching duty cycle to regulate the controlled bus voltage to a target value. The pulse-width modulator for a stage provides a substantially identical switching duty cycle to each switch of the stage. The switching duty cycle includes a signal to control a switch on and then off for a portion of a switching period.

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