Power supply with capacitive mains isolation

Details Power supply with capacitive mains isolation Power supply with capacitive mains isolation

2006-04-04

2006-04-04

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

C323S285000, C323S290000, C363S021020

Reexamination Certificate

active

07023183

ABSTRACT:
A power supply with capacitive mains isolation, comprises a source of an input supply voltage developed between a first terminal and a second terminal. A first supply inductance is coupled to the first terminal, and a second supply inductance is coupled to a load circuit. A switch responsive to a periodic control signal applies the input supply voltage to the first supply inductance to generate a current in the first supply inductance at a first polarity, during a first portion of a period of the control signal when the switch is at a first switch state. A pair of capacitors operate to couple the first supply inductance to the second supply inductance during a second portion of the period of the control signal when the switch is at a second switch state. The pair of capacitors isolate the first and second terminals, respectively, from the second supply inductance at a range of frequencies that is lower than a frequency of the control signal. A first rectifier is coupled to the first supply inductance for preventing the first supply inductance current from changing polarity, during the second portion of the period.

REFERENCES:
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patent: 6343027 (2002-01-01), Kerwin
patent: 6608770 (2003-08-01), Vinciarelli et al.
patent: 0696841 (1996-02-01), None
M. Brkovic; S. Cuk, California Inst. of Technol., Pasadena, CA US, “Automatic current shaper with fat output regulation and soft-switching” Telecommunications energy conference, 1993, vol. 1, Sep. 27, 1993.
M.T. Madigan, R.W. Erikson; E.H. Ismail, Unitrod Corp, Cary,NC US “Integrated High-Quality Rectifier-Regulator” Insustrial Electronics, IEEE Transactions, vol. 46, Aug. 1999, pp. 749-758.
Copy of Search Report Dated Jul. 6, 2004.

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