An observer structure to obtain a speed sensorless digitally controlled induction motor drive is proposed in the paper. It is based on a full order flux observer expressed in complex form. An adequate arrangement of the error system allows to determine the drive velocity, also if an inverter modulation strategy is considered. At last, approximated solutions implementable on a microprocessor are proposed. The numerical simulation shows a very fast drive response, an high accuracy of the motor state estimation and a good robustness to the rotor resistance variations.
A SPEED SENSORLESS DIGTALLY CONTROLLED INDUCTION MOTOR DRIVE
ATTAIANESE, Ciro;
1994-01-01
Abstract
An observer structure to obtain a speed sensorless digitally controlled induction motor drive is proposed in the paper. It is based on a full order flux observer expressed in complex form. An adequate arrangement of the error system allows to determine the drive velocity, also if an inverter modulation strategy is considered. At last, approximated solutions implementable on a microprocessor are proposed. The numerical simulation shows a very fast drive response, an high accuracy of the motor state estimation and a good robustness to the rotor resistance variations.File in questo prodotto:
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