Control system for synchronous brushless motors utilizing torque

Details Control system for synchronous brushless motors utilizing torque Control system for synchronous brushless motors utilizing torque

1983-07-28

1984-12-25

Truhe, J. V.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

318254, 318715, G05B 106

Patent

active

044906617

ABSTRACT:
In an improved motor control system for a pulse width modulated synchronous brushless motor, means for adaptively controlling the "torque angle", i.e. the angle between the rotating magnetic field created by the stator windings and the rotor field created by the permanent magnets on the rotor, is provided. The relationship between the two magnetic fields is controlled as a function of load and speed to provide the optimum operating point at all times. Controlling the torque angle effectively varies the back EMF constant K.sub.e (V/RPM), and the torque constant K.sub.+ (torque/ampere) of the motor.

REFERENCES:
patent: 3345547 (1967-10-01), Dunne
patent: 3753067 (1973-08-01), Milligan
patent: 3766458 (1973-10-01), Nishimura et al.
patent: 4135235 (1979-01-01), Baker
patent: 4223261 (1980-09-01), White
patent: 4334179 (1982-06-01), Grimes et al.
Slemon, et al., IEEE Transactions on Industry Applications, vol. IA-9, No. 2, Mar./Apr. 1973, pp. 216-219.
Hafle, et al., Control Engineering, vol. 22, No. 8, Aug. 1975, pp. 39-40.

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