Apparatus and method for controlling brushless electric motors

Details Apparatus and method for controlling brushless electric motors Apparatus and method for controlling brushless electric motors

1991-12-11

1993-07-06

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02P 602

Patent

active

052257460

ABSTRACT:
A brushless direct current motor is energized by a power stage. Switches of the power stage are selectively switched by an electronic control device. In order to determine the correct commutation pattern, without using rotor position indicators, the control device is arranged to tap the power fed to the motor. The samples received by the motor, in an ordered sequence, define an analogue function whose parameters can be determined by vector addition. The computations applied to the sample enable the necessary commutating information and signals to be generated in a particularly rapid manner.

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patent: 4712050 (1987-12-01), Nagasawa et al.
patent: 5028852 (1991-07-01), Dunfield
N. H. Mvungi et al., "A New Sensorless Position Detector for SR Drives", Fourth International Conference on Power Electronics and Variable-Speed Devices, Jul. 19, 1992, pp. 249-252.
Y. H. Hu et al., "A Novel Implementation of a Chirp Z-transform Using a CORDIC Processor", IEEE Transactions on Acoustics, Speech and Signal Processing, vol. 38, No. 2, Feb. 1990, pp. 352-354.
Y. H. Hu, "The Quantization Effects of the CORDIC Algorithm", 1988 International Conference on Acoustics, Speech and Signal Processing, Apr. 1988, pp. 1822-1825.

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