DEVICE FOR CONTROLLING POWER CONVERSION CIRCUIT

A controller for a power conversion circuit includes a first limiter for limiting a compensating voltage component within a compensating voltage switching level. A delay time measurement section measures an ON-delay time and an OFF-delay time, based on a binarized digital value and a PWM command val...

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Bibliographische Detailangaben
Hauptverfasser:	HAMADA, Shizunori, YAMAMOTO, Yasuhiro
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	A controller for a power conversion circuit includes a first limiter for limiting a compensating voltage component within a compensating voltage switching level. A delay time measurement section measures an ON-delay time and an OFF-delay time, based on a binarized digital value and a PWM command value. A multiplier calculates an error voltage component average value by multiplying an average value of the ON-delay time and the OFF-delay time by a value that is obtained by dividing a direct-current power supply voltage by a half cycle of a triangular wave carrier signal. A second limiter extracts a component of the error voltage component average value that is beyond the compensating voltage switching level in absolute value. An adder sets a combined compensating voltage component to a sum of a limited compensating voltage component outputted by the first limiter and a limited error voltage component outputted by the second limiter.