A simplified field oriented control method for low cost inductionmotor drives

摘要

A new method is investigated for the control of induction motordrives using a PWM voltage source inverter. A simplified controlalgorithm was developed in stator flux coordinates which corresponds toa compromise between performance and hardware complexity. Currentsensors are further suppressed in order to achieve attractive low costsystems for small motor drives. Comparative results are establishedbetween the proposed method and the classic rotor field oriented controlmethod, showing interesting characteristics for the new one. Thissimplified control procedure makes it suitable for application with aneight bit microcontroller, experimental results from such a system areshown. Intrinsic capabilities and limitations are pointed out