Current and flux regulation in field-weakening operation [of induction motors]
Authors:
- F. BrizFBF. Briz
- A. DiezADA. Diez
- M.W. DegnerMDM.W. Degner
- R.D. LorenzRLR.D. Lorenz
- 1 January 2001
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Industry Applications
- Vol. 37 (1) , 42-50
Abstract
Field-weakening techniques have been developed which provide maximum torque capability above rated speed. Unfortunately, most of these techniques are valid only for steady-state operation and show significant sensitivity to DC-bus voltage and machine parameters. This paper analyzes the requirements of dynamically providing maximum torque under field-weakening operation. Three major issues are addressed: current regulator design; saturation techniques for current regulators in order to ensure best performance under voltage constraints; and flux regulator design to minimize transient errors when varying flux. Maximum DC-bus utilization through the proper use of saturation techniques, dynamic response and reduced sensitivity are the advantages of the proposed solution.Keywords
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