Series resonant power converter and method of controlling...

Details Series resonant power converter and method of controlling... Series resonant power converter and method of controlling...

H - Electricity

02

M

321/27

H02M 3/337 (2006.01)

Patent

CA 1318349

ABSTRACT OF THE DISCLOSURE A series resonant power converter in which a resonant capacitor is commonly used in a series resonant circuit and a parallel resonant circuit, whereby a capacitance of the resonant capacitor can be considerably decreased as compared with that of a tank circuit according to a prior art, so that an energy handled by the resonant capacitor can be decreased, which results in decreasing a size of the resonant circuit and also decreasing a power loss. The converter includes means for detecting and com- puting a voltage-applied across a main switch means in its OFF-state and a control circuit for driving the main switch means to its ON-sate when the detected and computed value of the voltage drops to a minimum voltage required to sustain oscillation of the series resonant circuit. The minimum voltage can be obtained by computing the signals fed from the detecting circuit for detecting an input voltage, a detecting circuit for detecting a voltage of a second resonant circuit and a detecting circuit for detecting a DC output voltage converted to a primary side of a main transformer.

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