Stator resistance tuning in a stator-flux field-oriented drive using an instantaneous hybrid flux estimator
- 1 January 1998
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Electronics
- Vol. 13 (1) , 125-133
- https://doi.org/10.1109/63.654966
Abstract
A self-tuning control scheme for stator-flux field-oriented induction machine drives in electric vehicles operating over a wide speed range is discussed in this paper. The stator flux can be determined accurately from the terminal voltage when the machine is operating at high speed. However, at low speed, the stator resistance must be known to calculate the stator flux. The problem of calculating the stator flux accurately over the entire speed range is addressed. The rotor flux can be found from the machine speed and rotor time constant. The stator flux, at low speed, is then calculated directly from the rotor flux. By alternating between these two methods of determining the stator flux, a self-tuning operation is achieved, wherein the stator and rotor resistances are periodically updated. Since both methods of determining the stator flux are forced to track one another, a smooth transition between flux estimators is obtained. The torque and flux are then controlled in a deadbeat fashion. Good torque control over a wide speed range can therefore be obtained. With the proposed scheme, the advantages of direct torque control are obtained over the entire speed range with the addition of a speed sensor.Keywords
This publication has 6 references indexed in Scilit:
- A stator flux oriented induction machine drivePublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- A physically insightful approach to the design and accuracy assessment of flux observers for field oriented induction machine drivesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Direct torque control of induction machines over a wide speed rangePublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Performance evaluation of a direct torque controlled drive in the continuous PWM-square wave transition regionIEEE Transactions on Power Electronics, 1995
- Direct torque control of induction machines using space vector modulationIEEE Transactions on Industry Applications, 1992
- A simplified approach to continuous on-line tuning of field-oriented induction machine drivesIEEE Transactions on Industry Applications, 1990