Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Reexamination Certificate
2011-08-30
2011-08-30
Laxton, Gary L (Department: 2838)
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
C363S097000
Reexamination Certificate
active
08009446
ABSTRACT:
A ripple voltage suppression apparatus includes a DC/DC converter and a control circuit. The DC/DC converter has a power electronic switch. The control circuit has a voltage detector detecting a DC output voltage of the DC/DC converter, a ripple voltage suppression circuit receiving the detected DC output voltage to generate an AC control signal for controlling an AC component of a duty ratio of the power electronic switch, an output voltage regulation circuit receiving the detected DC output voltage to generate a DC control signal for controlling an DC component of a duty ratio, an adder adding the AC and DC control signals to form a combined control signal, and a PWM circuit converting the combined control signal into a PWM signal to control the power electronic switch. Only the DC output voltage of the DC/DC converter has to be detected for the control circuit.
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Chou Hung-Liang
Feng Ya-Tsung
Lai Li-Hsiang
Shen Jia-Min
Wu Chin-chang
Ablerex Electronics Co., Ltd.
Kamrath Alan
Kamrath & Associates PA
Laxton Gary L
LandOfFree
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