DocumentCode :
1201798
Title :
Interior Permanent-Magnet Synchronous Motors for Adjustable-Speed Drives
Author :
Jahns, Thomas M. ; Kliman, Gerald B. ; Neumann, Thomas W.
Author_Institution :
General Electric Company, Corporate Research and Development Center, P.O. Box 43, Room 37-325, Schenectady, NY 12301.
Issue :
4
fYear :
1986
fDate :
7/1/1986 12:00:00 AM
Firstpage :
738
Lastpage :
747
Abstract :
Interior permanent-magnet (IPM) synchronous motors possess special features for adjustable-speed operation which distinguish them from other classes of ac machines. They are robust high powerdensity machines capable of operating at high motor and inverter efficiencies over wide speed ranges, including considerable ranges of constant-power operation. The magnet cost is minimized by the low magnet weight requirements of the IPM design. The impact of the buried-magnet configuration on the motor´s electromagnetic characteristics is discussed. The rotor magnetic circuit saliency preferentially increases the quadrature-axis inductance and introduces a reluctance torque term into the IPM motor´s torque equation. The electrical excitation requirements for the IPM synchronous motor are also discussed. The control of the sinusoidal phase currents in magnitude and phase angle with respect to the rotor orientation provides a means for achieving smooth responsive torque control. A basic feedforward algorithm for executing this type of current vector torque control is discussed, including the implications of current regulator saturation at high speeds. The key results are illustrated using a combination of simulation and prototype IPM drive measurements.
Keywords :
AC machines; Inverters; Permanent magnet motors; Reluctance motors; Robustness; Rotors; Saturation magnetization; Synchronous motors; Torque control; Variable speed drives;
fLanguage :
English
Journal_Title :
Industry Applications, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-9994
Type :
jour
DOI :
10.1109/TIA.1986.4504786
Filename :
4504786
Link To Document :
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