AC to DC converter with unity power factor

Details AC to DC converter with unity power factor AC to DC converter with unity power factor

1989-06-23

1990-07-10

Wong, Peter S.

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

323285, G05F 1613

Patent

active

049409298

ABSTRACT:
An AC to DC converter comprises a bridge rectifier followed by a boost circuit. The boost circuit includes an inductor, diode and load capacitor in series and a shunting switch connected to shunt the diode and load capacitor. The control circuit for switching the shunting switch comprises a differential circuit, a multiplier and a duty cycle generator in a feedback loop which maintains a constant output voltage on the capacitor. To eliminate the response to ripple on the output voltage, the differential circuit does not respond to voltages within a dead band.

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patent: 4792887 (1988-12-01), Bernitz et al.
patent: 4837495 (1989-06-01), Zansky

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