Method and apparatus for driving a brushless DC motor without ro

Details Method and apparatus for driving a brushless DC motor without ro Method and apparatus for driving a brushless DC motor without ro

1998-05-08

1999-09-07

Ip, Paul

Electricity: motive power systems

Switched reluctance motor commutation control

318439, 318138, H02P 700

Patent

active

059492040

ABSTRACT:
In a brushless dc motor, commutation is performed without the use of rotor position sensors. A voltage across a non-conducting winding of the motor is measured, a voltage across a conducting winding of the motor is computed, an emf Park vector is computed from the voltages, an imaginary component of a rotated emf Park vector is extracted, and the imaginary component is processed to determine when to perform the commutation from one winding to the next sequential winding.

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Joohn-Sheok Kim, et al., "New Approach for the Low Speed Operation of the PMSM Drives Without Rotational Position Sensors", Records of the Annual Power Electronics Specialists Conference (PESC., Atlanta), vol. 2, Nr. Con. 26, Jun. 12, 1996, pp. 766-771.
D. Gerenier, et al., "A Park-like Transformation for the Study and the Control of a Non-Sinusoidal Brushless DC Motor", Proceedings of the 1995 IEEE EICON International Conference on Industrial Electronics . . . , 11.6-10, 1995, p. 838, par. B-C.

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