Linear force motor

Details Linear force motor Linear force motor

1985-06-17

1986-12-23

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Linear

310 14, 310 30, 310 24, 318122, H02K 4100

Patent

active

046314300

ABSTRACT:
A linear force motor has an elongated body provided with an annular chamber therewithin. An armature is arranged within the chamber for axial movement relative thereto. Two axially-spaced permanent magnets, with their like poles arranged to face one another, are arranged within the body radially inwardly of the chamber, and are separated by a common polepiece. The force motor has four axially-spaced active air gaps, arranged in various reciprocal pairs and various parallel pairs. When the armature is shifted one direction relative to the body, the majority of each magnet's static flux passes through one parallel pair of air gaps. When the armature is shifted in the other direction relative to the body, the majority of each magnet static flux passes through the other parallel pair of air gaps. The motor has one or more coils operatively arranged to generate control flux in a path which passes through at least one reciprocal pair of air gaps. The control flux, when superimposed on the static flux pattern, creates a net flux, which urges the armature to move in a desired direction relative to the body.

REFERENCES:
patent: 3119940 (1964-01-01), Pettit et al.
patent: 3241006 (1966-03-01), Boyko
patent: 3425009 (1969-01-01), Voigt et al.
patent: 3518463 (1970-06-01), Abbott
patent: 3670223 (1972-06-01), Pommeret
patent: 3699365 (1972-10-01), Leitgeb
patent: 3755699 (1973-08-01), Cartwright
patent: 3805099 (1974-04-01), Kelly
patent: 3894817 (1975-07-01), Majoros et al.
patent: 3931554 (1976-01-01), Spentzas

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