System and method for controlling a permanent magnet...

Electricity: motive power systems – Switched reluctance motor commutation control

Reexamination Certificate

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C318S721000

Reexamination Certificate

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07135828

ABSTRACT:
A system and method are provided for controlling a three-phased permanent magnet electric motor terminal voltages in relation to both changes in speed and torque of the permanent magnet electric motor, whereby phase currents are first rotated from a stationary frame to two decoupled current components in a rotor synchronous frame, which enable to derive a voltage along a quadrature axis and a voltage along a direct axis thereof, before rotating back the quadrature and direct axis voltages from the rotor synchronous frame to the stationary frame to yield the permanent magnet electric motor terminal voltages.

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Low KS et al:“Two-degree-of-freedom control of a PMSM drive without mechanical sensor”, lecon ′98, Proceedings of the 24thAnnual Conference of the IEEE Industrial Electronics Society. AACHEN, Aug. 31-Sep. 4, 1998. Annual Conference of the IEEE Industrial Electronics Society. New York, NY: IEEE US, vol. 1, Aug. 31, 1998, pp. 498-502, XP001003522. ISBN: 0-7803-4505-5 p. 498, column 1, paragraph 3; figures 1,2,5 p. 500-501.

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