Method of and apparatus for the autosynchronization of an electr

Details Method of and apparatus for the autosynchronization of an electr Method of and apparatus for the autosynchronization of an electr

1983-08-03

1985-11-12

Duggan, Donovan F.

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

318114, 318132, 310 30, H02K 3300

Patent

active

045530742

ABSTRACT:
An electromagnet hammer of the type described in U.S. Pat. No. 4,215,297 is autosynchronized by triggering the discharge thyristor in response to the detection of the position of the armature by a proximity detector, or by direct detection of the zero passage of the negative amplitude of the discharge current, or at a reference point representing the position of the armature, with a delay equal to at least half the period of the natural period of oscillation of the armature/plunger and its elastic suspension.

REFERENCES:
patent: 3118333 (1984-01-01), Woodward
patent: 3649893 (1972-03-01), Lajoie
patent: 3787715 (1974-01-01), Eaton, Jr.
patent: 4049497 (1977-09-01), McGhee
patent: 4101816 (1978-07-01), Shepter
patent: 4215297 (1980-07-01), Jacquemet
patent: 4303869 (1981-12-01), Baran
patent: 4403176 (1983-09-01), Cranston

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