AC to DC converter system with ripple feedback circuit

Details AC to DC converter system with ripple feedback circuit AC to DC converter system with ripple feedback circuit

1993-08-13

1995-11-28

Wong, Peter S.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 80, 363 89, H02M 112

Patent

active

054713781

ABSTRACT:
A nonlinear ripple feedback circuit for use with a current-sourced rectifier system with an inductor input filter. The nonlinear ripple feedback circuit eliminates the oscillation of the rectifiers and improves the line-current waveform by sensing of and compensating for any amplitude of ripple appearing in the DC-side current. A sample of the rectified line voltage is multiplied by the product of a voltage feedback control signal times the ripple feedback signal ratio to form the input to the pulse-width modulator which produces the gating waveform for the converter of the rectifier system such that the oscillation and sensitivity of the converter system is reduced, and the AC line current waveform has low distortion, regardless of the DC-side ripple current levels.

REFERENCES:
patent: 3798531 (1974-03-01), Allington
patent: 4468603 (1984-08-01), Vander Meer et al.
patent: 4683529 (1987-07-01), Bucher, II

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