Driver device for a duty solenoid valve

Details Driver device for a duty solenoid valve Driver device for a duty solenoid valve

1990-11-21

1993-04-13

Pellinen, A. D.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Systems for magnetizing, demagnetizing, or controlling the...

323222, 323284, 364510, 25112905, H01H 4718, G05F 156

Patent

active

052028135

ABSTRACT:
A driver device for a duty solenoid valve comprises a pair of transistors 27 and 31 for controlling the excitation current level flowing through the solenoid 17 of the valve, and a transistor 45 for turning on and off the excitation current. The excitation current level is detected via an integrator 63 and A/D converter 61 by a microcomputer 62. In response to the detected excitation current level, the microcomputer 62 generates a first pulse signal (PWM signal) via OUT3 to control the level of the excitation current to a target level. Further, the microcomputer 62 outputs a second pulse signal via the OUT4 to the transistor 45 to control the duty ratio of the solenoid 17.

REFERENCES:
patent: 4745514 (1988-05-01), Takeshima et al.
patent: 4770178 (1988-09-01), Sausner et al.
patent: 4825333 (1989-04-01), Clive et al.
patent: 4854920 (1989-08-01), Mimura
patent: 4953056 (1990-08-01), Yakuwa et al.
patent: 4978865 (1990-12-01), Hartmann et al.

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