Power source

Details Power source Power source

1983-12-30

1986-01-14

Wong, Peter S.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 37, 363 98, 363 47, H02M 7537

Patent

active

045648972

ABSTRACT:
A power source for providing a high frequency ac output voltage is provided with a rectifier, a smoothing circuit with an inductor and a smoothing capacitor, and an inverter having a switching device for switching the input dc voltage from the rectifier to provide a high frequency ac voltage output with reduced ripple. Also included in the smoothing circuit is a charge storage device by the operation of which the inductor receives electromagnetic energy from the current therein when the switching device is switched on and electromagnetic energy is fed to the smoothing capacitor to charge the same when the switching device is switched off, with the resulting voltage developed across the capacitor being applied to the inverter input. The charge storage device includes the inductor of the smoothing circuit and the switching device common to the inverter, such that the charge storage device is of the chopper-type which enables the inductor to be reduced to a smaller value while allowing it to retain a high power factor, and such that it can be readily incorporated in the power supply without requiring any additional switching devices and without undue increase in the component costs.

REFERENCES:
patent: 4277728 (1981-04-01), Stevens

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