Variable PFC and grid-tied bus voltage control

Details Variable PFC and grid-tied bus voltage control Variable PFC and grid-tied bus voltage control

2008-11-21

2011-12-20

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Frequency or repetition rate conversion or control

C327S119000, C327S333000, C363S034000, C363S037000, C363S067000

Reexamination Certificate

active

08081019

ABSTRACT:
An apparatus for generating a compensation signal for a power converter where the second harmonic ripple on the voltage bus is substantially removed from the compensation signal. The apparatus comprises a frequency-locked clock generator, a bus voltage data generator, a stack, and a compensation signal generator. The frequency-locked clock is coupled to the power converter voltage bus that contains harmonics of the AC line frequency. The clock generator frequency locks to the second harmonic of the AC line frequency and creates a system clock which is used for the synchronous operations throughout the apparatus. The bus-voltage data generator inputs a power converter scaled-bus voltage, generates bus-voltage data at a sampling rate which is determined by the coupled system clock. The output of the bus-voltage generator is input into a stack. The output of the stack is coupled to a summer to remove the second harmonic ripple, and is used by a modified PID′ filter to generate a compensation signal for a power converter controller.

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