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

B - Operations, Transporting

41

J

342/29.1

B41J 9/38 (2006.01) B41J 9/44 (2006.01) B41J 23/32 (2006.01) H01H 47/32 (2006.01)

Patent

CA 1172341

CONSTANT ENERGY DRIVE CIRCUIT FOR ELECTROMAGNETIC PRINT HAMMERS Abstract of the Disclosure A constant energy drive circuit comprises two inter- connected 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.

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