Field orientation control of a permanent magnet motor

Details Field orientation control of a permanent magnet motor Field orientation control of a permanent magnet motor

1987-12-14

1989-03-21

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02P 600

Patent

active

048146773

ABSTRACT:
A field orientation control system for an interior permanent magnet synchronous motor includes function generating means responsive to a torque command signal for producing direct and quadrature axis direct current signals which are converted to synchronously-varying two-phase signals for coupling to power control means, for effecting sinusoidal energization of the permanent magnet motor. The function generators modify the torque command signal as a predetermined function of the motor parameters. Rotor position information is derived from measured stator voltages and currents without the use of a separate rotor position sensor. The control system includes means for establishing a preselected amplitude of a stator .alpha.-axis current in the motor at start-up prior to establishing orthogonal .beta.-axis current such that the motor rotor is caused to become initially aligned with the selected .alpha.-axis.

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Bose, B. K., "A High Performance Inverter-Fed Drive System of an Interior Permanent Magnet Synchronous Machine", Conference Record of 1987 IEEE Industrial Applications Society Meeting, pp. 269-276.
Jahns, T. M., et al., "Interior Permanent-Magnet Synchronous Motors for Adjustable-Speed Drives", IEEE Transactions on Industry Applications, vol. IA-22, No. 4, Jul./Aug. 1986, pp. 738-747.

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