MOTOR DRIVE CONTROL WITH A SINGLE CURRENT SENSOR USING SPACE VECTOR TECHNIQUE

MOTOR DRIVE CONTROL WITH A SINGLE CURRENT SENSOR USING SPACE VECTOR TECHNIQUE

A drive system for a three phase brushless AC motor is arranged to optimise the transistor switching pattern to improve power output whilst allowing current measurement in all of the phases using a single sensor. This is achieved by defining voltage demand vectors x where more than two states are re...

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Bibliographische Detailangaben
Hauptverfasser: SZABO, Adrian, WILLIAMS, Connel, Brett, COLES, Jeffrey, Ronald, FARDOUN, Abbas, Ahmad, LI, Jiang, DIXON, Christopher, David
Format: Patent
Sprache:eng ; fre ; ger
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:A drive system for a three phase brushless AC motor is arranged to optimise the transistor switching pattern to improve power output whilst allowing current measurement in all of the phases using a single sensor. This is achieved by defining voltage demand vectors x where more than two states are required to meet a minimum state time requirement determined by the single sensor method, and calculating three or more state vectors which produce the demanded vector x whilst still allowing single current sensing. Various methods of optimising the PWM pattern so as to give maximum output whilst using single current sensing are also disclosed.