Constant energy drive circuit for electromagnetic print hammers

Details Constant energy drive circuit for electromagnetic print hammers Constant energy drive circuit for electromagnetic print hammers

1981-06-18

1983-10-04

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307494, 307228, 307240, 328147, H03K 301, H03K 326, H03K 1726, H03K 522

Patent

active

044081294

ABSTRACT:
A constant energy drive circuit comprises two interconnected chopping circuits successively operable to control the current in a coil of an electromagnetic actuator. One chopping circuit operates during the rise time portion of the operating interval, the other operates beginning with the occurrence of a predetermined peak current and for remainder of the operating interval of fixed duration.

REFERENCES:
patent: 3967182 (1976-06-01), Scott
patent: 4123729 (1978-10-01), Buetemeister

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