Method and apparatus for high-speed driving of electromagnetic l

Details Method and apparatus for high-speed driving of electromagnetic l Method and apparatus for high-speed driving of electromagnetic l

1997-06-27

1998-08-18

Ro, Bentsu

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

361152, 361155, 318134, H01F 708, H01F 718

Patent

active

057962235

ABSTRACT:
An apparatus for driving an electromagnetic load by applying a high voltage at the initial driving stage and thereafter applying a constant hold current is provided with a switch for supplying high-voltage energy to the electromagnetic load from a capacitor for storing high-voltage energy and a control circuit responsive to an electric signal for starting electromagnetic load driving and the output voltage of the capacitor. The control circuit turns the switch on at application of the electric signal and keeps it on until the output voltage reaches a prescribed level. The apparatus of this configuration enables optimum timing of changeover from high-voltage application mode operation to hold mold operation with simple circuitry.

REFERENCES:
patent: 3982505 (1976-09-01), Rivere
patent: 4310868 (1982-01-01), Lillie et al.
patent: 4511945 (1985-04-01), Nielsen
patent: 4679116 (1987-07-01), Oshizawa et al.
patent: 5402303 (1995-03-01), Luck et al.

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