Magnetic drive system for generating linear movements

Details Magnetic drive system for generating linear movements Magnetic drive system for generating linear movements

1982-02-25

1984-03-27

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Linear

310 27, H02K 4100

Patent

active

044397003

ABSTRACT:
A magnetic drive system for generating linear movements, such as for driving a printing element in a high speed printer, has a bar-shaped armature with a coil comovable attached thereto, the coil and armature combination being seated in a yoke for longitudinal movement relative thereto. The yoke and armature consist primarily of low magnetic retentive material and at least one permanent magnet is disposed in the magnetic curcuit formed by the yoke and armature such that a magnetic flux is produced in the armature parallel to the longitudinal axis thereof. The coil is connected to a voltage source for operation such that current flow through the coil generates a field in the longitudinal direction of the armature which reinforces the attractive force of the magnetic field at one end of the armature while simultaneously reducing the force at the opposite end to thereby move the armature and coil together. The length of the yoke in the longitudinal direction of the armature is greater than the portion of the armature consisting of low magnetic retentive material.

REFERENCES:
patent: 3018467 (1962-01-01), Harris
patent: 3129347 (1964-04-01), Tognola
patent: 3417268 (1968-12-01), Lace
patent: 3581127 (1971-05-01), Wyke
patent: 3917987 (1975-11-01), Inoue
patent: 4318038 (1982-03-01), Munehiro

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