SENSOR-LESS CONTROLLING METHOD FOR AC MOTOR

The present invention relates to a sensor-less control method for an AC motor. According to the present invention, the sensor-less control method for an AC motor includes a step for injecting the square wave voltage of a switching frequency; a step for obtaining a synchronous reference frame current...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	PARK, NAE CHUN, KIM, SANG HOON
Format:	Patent
Sprache:	eng ; kor
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:	The present invention relates to a sensor-less control method for an AC motor. According to the present invention, the sensor-less control method for an AC motor includes a step for injecting the square wave voltage of a switching frequency; a step for obtaining a synchronous reference frame current; a step for calculating the synchronous reference frame current; a step for changing a coordination system; a step for extracting a radio frequency component current; and a step for outputting an estimated velocity and an estimated location. [Reference numerals] (110) Current controller;(120) Envelope detector;(130) Status filter;(150) PWM inverter;(160) AC motor