Circuit for regulating a pulsating current

Details Circuit for regulating a pulsating current Circuit for regulating a pulsating current

1989-04-20

1990-12-18

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Switching systems

Switch actuation

307 101, 361152, 361154, 123490, 318599, H01H 4732

Patent

active

049788655

ABSTRACT:
In a circuit for controlling a pulsating current through an inductor, particularly the coil of an electromagnetic valve, the inductor is connected in series with a semiconductor switch and in parallel with a free-running diode. Furthermore a desired-value voltage is fed to a controller the output of which is connected via a pulse-width modulator to a control input of the semiconductor switch. A current flows through the inductor and the semiconductor switch, during a state of conduction of the semiconductor switch, to be measured. The current measurement is gated, in response to pulse-width modulation at the controller, and is then integrated for improved measurement of the current.

REFERENCES:
patent: 4446410 (1984-05-01), Yagura et al.
patent: 4452210 (1984-06-01), Sasayama et al.
patent: 4492913 (1985-01-01), Arnold et al.
patent: 4556926 (1985-12-01), Yanagida
patent: 4706619 (1987-11-01), Buchl
patent: 4823825 (1989-04-01), Buchl
patent: 4825333 (1989-04-01), Clive et al.

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