Electric power steering system

There is provided a drive control method for a motor including multiple sets of coils and drive circuits in an electric power steering system. In order to reduce computational load when sensorless control is executed, an electrical angle estimator (110) includes an ±-axis voltage component adder (11...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Aoki, Kenichiro, Mikamo, Satoru
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS MOTOR VEHICLES PERFORMING OPERATIONS TRAILERS TRANSPORTING
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Beschreibung
Zusammenfassung:	There is provided a drive control method for a motor including multiple sets of coils and drive circuits in an electric power steering system. In order to reduce computational load when sensorless control is executed, an electrical angle estimator (110) includes an ±-axis voltage component adder (115) and a ²-axis voltage component adder (116) that add together voltage vectors of a first coil (221) and a second coil (222) expressed in a two-phase fixed coordinate system, an ±-axis current component adder (117) and a ²-axis current component adder (118) that add together current vectors of the first coil (221) and the second coil (222) expressed in a two-phase fixed coordinate system, and an induced voltage computing unit (119) that computes an induced voltage (E) based on an added voltage vector and an added current vector.