Control apparatus for motor, and motor unit having the control a

Details Control apparatus for motor, and motor unit having the control a Control apparatus for motor, and motor unit having the control a

1999-06-25

2000-09-19

Masih, Karen

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318439, 318606, 318608, H02K 2300

Patent

active

061217360

ABSTRACT:
A motor control apparatus and a motor unit having such a motor control apparatus according to the present invention are constructed to detect a terminal voltage for switching elements of the same phase in a dead time period by a voltage output circuit 10, and to detect the instant when the sign of a phase current changes from the detected terminal voltage by a current sign change detection part 11. Based on the phase of a current sign change timing provided from the current sign change detection part 11 and the phase of a phase applied voltage, the first applied voltage control circuit 14 generates a phase applied voltage command to a switching element modulation circuit 9. Such arrangement makes it possible to provide motor continuous energization or motor energization drive near to 180 degrees at high efficiency, without the provision of any current sensors.

REFERENCES:
patent: 4246075 (1981-01-01), Hilbertz
patent: 5497741 (1996-03-01), Tashiro et al.
patent: 5980211 (1999-11-01), Tojo et al.
Takaharu Takeshita, et al. "Sensorless Brushless DC Motor Drives Using Current Estimation Error" Japanese Institute of the Electric Engineering T.IEE Japan, vol. 115-D, No. 4, 1995 pp. 420-427 (Apr. 1995).
Hiroshi Watanabe, et al. "A Sensorless Detecting Strategy of Rotor Position And Speed On Permanent Magnet Synchronous Motor" Japanese Institute of the Electric Engineering T.IEE Japan, vol. 110-D, No. 11, 1990 pp. 1193-1200 (Nov. 1990).

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