Electricity: motive power systems – Positional servo systems – With stabilizing features
Patent
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.
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Crowder, Jr. Albert M.
E-Systems Inc.
Ro Bentsu
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