Motor speed control apparatus using phase-advance based estimate

Details Motor speed control apparatus using phase-advance based estimate Motor speed control apparatus using phase-advance based estimate

1995-04-24

1998-01-20

Sircus, Brian

Electricity: motive power systems

Induction motor systems

Primary circuit control

318802, 318632, 318806, 318432, 364150, 364176, G01M 700

Patent

active

057105006

ABSTRACT:
The motor speed control apparatus according to the present invention controls the rotation speed of a motor to be constant in a state where a disturbance torque is present. The motor speed control apparatus includes a disturbance torque observer 1. The disturbance torque observer 1 estimates a disturbance torque .tau..sub.d based on a detected speed signal v detected by a speed detector 105 and a drive signal D supplied to a drive circuit 150, and cuts off high-frequency components thereof by means of filters 13 and 2 so as to output an estimated disturbance signal d. A comparator 130 outputs a speed error signal .DELTA.v, which is a difference between the detected speed signal v and a desired speed signal v.sub.r. An arithmetic unit 140 outputs a control signal c in accordance with the speed error signal .DELTA.v. A torque correction unit 3 corrects the control signal c by using the estimated disturbance signal d so as to output the drive signal D. The drive circuit 150 supplies a motor 100 with a drive current I.sub.a which is in accordance with the drive signal D.

REFERENCES:
patent: 4360767 (1982-11-01), Akiyama et al.
patent: 5091684 (1992-02-01), Iwashita
patent: 5349278 (1994-09-01), Wedeen
patent: 5467004 (1995-11-01), Matsuo et al.
patent: 5481417 (1996-01-01), Yokoyama et al.
patent: 5511930 (1996-04-01), Sato et al.
patent: 5525877 (1996-06-01), Umida
IEEE Transactions on Consumer Electronics; Nov. 1, 1992; vol. 38, No. 4, pp. 747-754; "Precision Motor Control System for VCR Using Disturbance and Velocity Observer".

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