Interior Permanent-Magnet Synchronous Motors for Adjustable-Speed Drives

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, includi...

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Bibliographic Details
Published inIEEE transactions on industry applications Vol. IA-22; no. 4; pp. 738 - 747
Main Authors Jahns, Thomas M., Kliman, Gerald B., Neumann, Thomas W.
Format Journal Article Conference Proceeding
LanguageEnglish
Published New York, NY IEEE 01.07.1986
Institute of Electrical and Electronics Engineers
Subjects
AC machines
Applied sciences
Electrical engineering. Electrical power engineering
Electrical machines
Exact sciences and technology
Inverters
Permanent magnet motors
Regulation and control
Reluctance motors
Robustness
Rotors
Saturation magnetization
Synchronous motors
Torque control
Variable speed drives
Design
Inverter
Operation study
Transistor converter
Synchronous machine
Magnetic circuit
Static convertor
Permanent magnet machine
Speed control
Electric drive
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Summary: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.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.1986.4504786