Power converter device and control method therefor

Power converter device and control method therefor

Power conversion device has first position/rotation detector 14, second position/rotation detector 15 whose resolution per rotation of motor is higher than the first position/rotation detector 14 but whose detection cycle is slower than the first position/rotation detector 14 and encoder switching o...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Kobori, Kenji, Kozaki, Keiki, Akaike, Hidekazu, Kezuka, Nobutaka
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 OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS
CONTROL OR REGULATION THEREOF
CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
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Beschreibung
Zusammenfassung:Power conversion device has first position/rotation detector 14, second position/rotation detector 15 whose resolution per rotation of motor is higher than the first position/rotation detector 14 but whose detection cycle is slower than the first position/rotation detector 14 and encoder switching operation process unit 18. The encoder switching operation process unit 18 switches signals between the first and second position/rotation detectors 14, 15 and outputs the signal of the first position/rotation detector 14 or of the second position/rotation detector 15, or adjusts a ratio of the signal between the first and second position/rotation detectors 14, 15 and output a signal obtained by adding adjusted signals. With this, in the power conversion device, the encoder having high resolution and slow detection time and the encoder having low resolution and fast detection time are properly used according to rotation speed, and current and the rotation speed are controlled with high accuracy.