Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Reexamination Certificate
2008-01-29
2008-01-29
Patel, Rajnikant B. (Department: 2838)
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
C323S290000, C363S080000, C363S089000, C327S530000
Reexamination Certificate
active
11232517
ABSTRACT:
A PFC AC-to-DC power supply is disclosed. According to various embodiments, the PFC AC-to-DC power supply comprises a switching converter comprising at least one main power switch and a PFC controller for controlling the at least one main power switch. The PFC controller may comprise a processing unit comprising a processor and a memory having firmware stored thereon which, when executed by the processor, causes the processor to compute an input current set point for the AC-to-DC power supply based on the output voltage of the AC-to-DC power supply. The PFC controller may also comprise hardware circuitry in communication with the processing unit. The hardware circuitry may comprise a first a/d converter, such as a window a/d converter, for outputting a digital input current error value based on the input current of the AC-to-DC power supply and an analog form of the input current set point from the processing unit. The hardware circuitry may also comprise a digital current mode compensator in communication with the first a/d converter for determining the duty cycle for the at least one main power switch based on the digital input current error value from the a/d converter.
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Artesyn Technologies, Inc.
Kirkpatrick & Lockhart Preston Gates & Ellis LLP
Patel Rajnikant B.
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