Sensorless control method and system for motor

A sensorless control method and system for a motor are provided. The includes a back EMF observer that is configured to estimate a back EMF of the motor and an angle error calculator that is configured to calculate an electrical angle error considering iron loss of the motor based on the back EMF es...

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Bibliographische Detailangaben
Hauptverfasser:	Kim Sungwon, Nam Kwang-Hee, Yeom Kitae, Yang Jaesik, Hwang Taewon, Kim Junwoo
Format:	Patent
Sprache:	eng
Schlagworte:	CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRICITY ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERATION MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES PERFORMING OPERATIONS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	A sensorless control method and system for a motor are provided. The includes a back EMF observer that is configured to estimate a back EMF of the motor and an angle error calculator that is configured to calculate an electrical angle error considering iron loss of the motor based on the back EMF estimated by the back EMF observer. An angle error compensator is configured to compensate the electrical angle error calculated by the angle error calculator. An electrical angle for compensating the calculated electrical angle error is obtained through simulation or experiment for the motor. In addition, a PLL controller is configured to receive the compensated electrical angle to estimate an actual angle by reducing the electrical angle error due to the iron loss, and to operate the motor based on the estimated actual angle.