MOTOR CONTROL DEVICE

A coil temperature estimation unit 12 estimates the coil temperature of a motor 1 from the equivalent resistance, heat capacity and thermal resistance of the coil of the motor 1, which are given in advance, from the applied voltage to the motor 1 detected by a voltage detector 17, and from a duty ra...

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Bibliographische Detailangaben
Hauptverfasser:	FUJITA YOUICHI, KAWAMURA SATOSHI, IKITAKE YOSHITAKA
Format:	Patent
Sprache:	eng
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
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Beschreibung
Zusammenfassung:	A coil temperature estimation unit 12 estimates the coil temperature of a motor 1 from the equivalent resistance, heat capacity and thermal resistance of the coil of the motor 1, which are given in advance, from the applied voltage to the motor 1 detected by a voltage detector 17, and from a duty ratio command value input from the outside. When a temperature abnormality deciding unit 13 decides that the coil temperature is not normal, a duty limiter 14 limits the duty ratio command value at a low value and outputs it to a FET driving circuit 15.