Electricity: motive power systems – Positional servo systems – With particular motor control system responsive to the...
Patent
1982-01-21
1984-05-01
Dobeck, B.
Electricity: motive power systems
Positional servo systems
With particular motor control system responsive to the...
318135, 318678, 361152, G05B 1100
Patent
active
044464100
ABSTRACT:
A control circuit comprises a switching element connected in series with the coil of an actuator for generating a drive current when rendered conductive. A drive current sensing resistor is coupled in a circuit with the switching element and the coil to develop a first voltage in response to the switching element being rendered conductive. A surge current sensing resistor is coupled in a circuit with the coil through a unidirectionally conducting element to develop a second voltage in response to the switching element being rendered nonconductive. The first and second voltage are amplified and fed to a differential integrator to which an actuator control signal is also applied. The output of the differential integrator is compared with the instantaneous value of a ramp voltage to generate gating pulses applied to the switching element.
REFERENCES:
patent: 3549966 (1969-07-01), Wilson
patent: 4150643 (1979-04-01), Sasayama et al.
patent: 4184090 (1979-04-01), Kawa et al.
patent: 4214290 (1980-07-01), Sloan
patent: 4216938 (1980-08-01), Inada et al.
patent: 4345296 (1982-08-01), Breitling
patent: 4377144 (1983-03-01), Takahashi
Morisada Kazutoshi
Satoyama Kenichiro
Yagura Toshiaki
Yamamoto Ryoichi
Yoshida Seietsu
Dobeck B.
Nippondenso Co. Ltd.
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