Back emf loop closure

Details Back emf loop closure Back emf loop closure

1987-09-04

1988-08-16

Ro, Bentsu

Electricity: motive power systems

Positional servo systems

With stabilizing features

318331, 318632, H02P 506, G05B 501

Patent

active

047647116

ABSTRACT:
The back emf voltage of a motor is extracted from the applied motor voltage and motor current by means of a control system including a back emf sensor, an adaptive motor resistance circuit, and a position integrator. In the back emf sensor a corrected motor resistance signal, iR, a motor inductance signal, L di/dt, and applied motor voltage, V.sub.m, are input to a summing junction. The summing junction subtracts the motor resistance signal and the motor inductance signal from the applied motor voltage to compute the back emf voltage. To correct for variations in motor resistance, the adaptive motor resistance circuits demodulates and integrates the back emf voltage from the summing junction and the motor position signal input to the system. By integrating the back emf voltage from the back emf sensor in the position integrator a motor position output is obtained as a signal for servo position loop closure.

REFERENCES:
patent: 3617844 (1971-11-01), Grygera
patent: 3705337 (1972-12-01), Grabl
patent: 3737748 (1973-06-01), Teders
patent: 3818297 (1974-06-01), Ha et al.
patent: 4078194 (1978-03-01), Johnson
patent: 4189666 (1980-02-01), Tetsugu et al.
patent: 4218640 (1980-08-01), Vialatte
patent: 4266168 (1981-05-01), Anderson
patent: 4274037 (1981-06-01), Soeda
patent: 4549122 (1985-10-01), Berkopec et al.
patent: 4549125 (1985-10-01), Sonobe

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