Power circuit with smoothing choke coil inductance varying...

Details Power circuit with smoothing choke coil inductance varying... Power circuit with smoothing choke coil inductance varying...

H - Electricity

02

M

H02M 7/30 (2006.01) H02M 1/12 (2006.01) H02M 1/00 (2006.01)

Patent

CA 2329573

A power circuit for rectifying and smoothing a commercial voltage to obtain a direct-current voltage. The power circuit comprises a smoothing choke coil inductance varying circuit for variably controlling an inductance value of a smoothing choke coil within a smoothing circuit. The smoothing choke coil inductance varying circuit flows a current through a secondary winding of the smoothing choke coil to provide induction based on an output voltage from a diode bridge such that an inductance value of a primary winding of the smoothing choke coil is at the maximum when the output voltage from the diode bridge is zero volt, is reduced with an increase in the output voltage, reaches a predetermined value when the output voltage is at the maximum, and is increased with a reduction in the output voltage.

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