Title:
CYCLO CONVERTER WITH NONLINEAR FEEDBACK FOR IMPROVING WAVEFORM
Document Type and Number:
Japanese Patent JPS56136181
Kind Code:
A
Abstract:
A cycloconverter produces an AC output of a desired frequency from an AC power source, using a reference waveform and a novel feedback loop. The quality of the output waveform of the cycloconverter is greatly improved by the feedback loop which compensates for the inherent nonlinearity of the converter forward gain. A feedback signal, preferably proportional to the current through a shunt capacitor of a converter-output-filter, is multiplied by a compensating signal generated by full wave rectification of the cycloconverter AC reference signal with the resultant signal summed in opposition with the reference signal before it is applied to the converter control circuit. Alternatively a more precise compensating signal can be generated through 90 DEG phase shifting and negative going full wave rectification of the sinusoidal cycloconverter reference signal.
Inventors:
DONARU YUUJIN BEIKAA
Application Number:
JP2852281A
Publication Date:
October 24, 1981
Filing Date:
March 02, 1981
Export Citation:
Assignee:
WESTINGHOUSE ELECTRIC CORP
International Classes:
H02M5/27; G05F1/10; (IPC1-7): H02M5/27
Domestic Patent References:
| JPS50122659A | 1975-09-26 |
Previous Patent: CONTROLLING METHOD OF REACTIVE POWER COMPENSATED CYCLOCONVERTER
Next Patent: MANUFACTURE OF DC HIGH VOLTAGE GENERATING DEVICE
Next Patent: MANUFACTURE OF DC HIGH VOLTAGE GENERATING DEVICE