Arrangement for rapid switching of an electromagnetic load

Details Arrangement for rapid switching of an electromagnetic load Arrangement for rapid switching of an electromagnetic load

1985-08-28

1987-01-27

Gellner, Michael L.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

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

123490, H01H 4732

Patent

active

046398228

ABSTRACT:
An arrangement for rapid switching of an electromagnetic load includes a series arrangement of a switching device with the electromagnetic load, a relief diode arranged in parallel with the electromagnetic load, and a capacitor arranged in parallel to the switching means. Another switching device is arranged parallel to the capacitor and controls the operation of the latter, while an additional switching device is arranged in series with the relief diode and controls the operation of such relief diode. An operating arrangement for controlling the various switching devices issues various control signals at least some of which depend on electric signals derived from the switching arrangement. During the operation of the switching arrangement, the operating arrangement selectively makes the various switching devices conductive and non-conductive in a predetermined sequence to enhance the speed of switching of the electromagnetic load between its two end states. The switching arrangement is especially suited for use in the fuel metering in internal combustion engines with the aid of magnetically operated valves.

REFERENCES:
patent: 4225898 (1980-09-01), Weber et al.
patent: 4234903 (1980-11-01), Harper
patent: 4323944 (1982-04-01), Hill
patent: 4360855 (1982-11-01), Ohba
patent: 4377144 (1983-03-01), Takahashi
patent: 4452210 (1984-06-01), Sasayama et al.
patent: 4473861 (1984-09-01), Kosak et al.
patent: 4511945 (1985-04-01), Nielsen
patent: 4533972 (1985-08-01), Ohashi

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