Excitation device for electromagnetic actuator

Details Excitation device for electromagnetic actuator Excitation device for electromagnetic actuator

1990-05-23

1991-09-03

Ro, Bentsu

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318257, H02P 122

Patent

active

050457667

ABSTRACT:
A device for the electrical excitation of the coil or coils of an electromagnetic actuator, especially that of a linear motor, the coil of which has a low self-inductance. This coil is supplied by a bridge of transistors. The error between a reference voltage and a voltage proportional to the current in this coil is used to turn off a pair of transistors of the bridge, and simultaneously saturate a transistor of the other pair and make the other transistor work in linear mode. Two electronic switches and one sign discriminator are used to this end.

REFERENCES:
patent: 3683253 (1972-08-01), Rummel et al.
patent: 3851235 (1974-11-01), Harrison
patent: 4206394 (1980-06-01), Flandorfer
patent: 4562393 (1985-12-01), Loyzim et al.
patent: 4703238 (1987-10-01), Palmin et al.
patent: 4800324 (1989-01-01), Kuttner

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