Power unit having self-oscillating series resonance converter

Details Power unit having self-oscillating series resonance converter Power unit having self-oscillating series resonance converter

2006-03-07

2006-03-07

Han, Jessica (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C363S019000, C363S037000, C363S098000

Reexamination Certificate

active

07009851

ABSTRACT:
The present invention relates to a power unit with a self-oscillating series resonance converter for feeding of a load. The series resonance converter comprises: two transistors TR1, TR2coupled together, which are arranged to individually be affected by a control transformer T1, a series connection of an inductor L1and a capacitor C4, and means to change the oscillating frequency of the transistors TR1, TR2and thereby the output voltage of the power unit. Each transistor TR1, TR2together with the series coupled discharging capacitor C6, C7or additional transistor TR3, TR4belonging thereto is connected in parallel with said inductor L1, capacitor C4and control transformer T1. The means to change the oscillating frequency of the transistors comprises a control oscillator OSC that in an alternating manner sends pulses that turns off the transistor TR1, TR2that conducts current and thereby the oscillating frequency of the transistors is controlled by the pulse frequency of the control oscillator OSC.

REFERENCES:
patent: 5313142 (1994-05-01), Wong
patent: 5621621 (1997-04-01), Lilliestrale
patent: 6169374 (2001-01-01), Chang
patent: 6337800 (2002-01-01), Chang
patent: 19801848 (1999-07-01), None

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