Linear oscillating electric machine with permanent magnet excita

Details Linear oscillating electric machine with permanent magnet excita Linear oscillating electric machine with permanent magnet excita

1980-05-08

1982-09-14

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Reciprocating

310 30, H02K 3300

Patent

active

043497578

ABSTRACT:
A linear electrodynamic machine is disclosed having permanent magnet excitation and an end flux leakage control. A flux carrying body having a plurality of annular magnets of alternating radially oriented polarities is disposed concentrically with respect to a stator having a plurality of annular wound coils. Relative axial reciprocation of the body and stator causes a reversal of the flux linking the coils while the flux in the body remains substantially constant. Focusing magnets provided on each end of the body and axial extensions provided on the stator insure uniformity of the alternating flux linking the coils and a constant flux intensity in the body to achieve high efficiencies.

REFERENCES:
patent: 3119940 (1964-01-01), Pettit et al.
patent: 3336488 (1967-08-01), Scott
patent: 3349247 (1967-10-01), Birkestrand
patent: 3366809 (1968-01-01), Scott
patent: 3433983 (1969-03-01), Keistman et al.
patent: 3484629 (1969-12-01), Kunz
patent: 3518463 (1970-06-01), Abbott
patent: 3536941 (1970-10-01), Tourtellotte

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