Solid-state commutator for use in electric motors

Details Solid-state commutator for use in electric motors Solid-state commutator for use in electric motors

1980-04-03

1982-06-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Signal isolator

250229, 310 46, 318480, G02B 2700

Patent

active

043330150

ABSTRACT:
A commutator is manufactured of a printed circuit board having a circular shape. A plurality of terminals are evenly spaced around the periphery of the printed circuit board, and may be connected to junction points in an armature winding. Phototransistors are mounted on the printed circuit board in order to connect selected pairs of terminals to contacts, to which contacts a source of power may be connected. The commutator disclosed herein can be incorporated in an electric motor in which a fixed light source illuminates groups of phototransistors individually, so as to properly direct current flow in the armature winding of the motor. As the commutator rotates, the phototransistors are turned on and off in a sequence, to maintain proper current flow in the armature winding as a function of commutator position with respect to the light source.

REFERENCES:
patent: 3364407 (1968-01-01), Hill

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