Coreless motor

Details Coreless motor Coreless motor

1997-02-06

1998-07-14

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 42, 310 81, 310 40MM, 310 89, 310 90, 310154, 310266, H02K 504, H02K 708

Patent

active

057809470

ABSTRACT:
A coreless motor has a cylindrical shell of magnetic material, a column-like magnet securely and coaxially positioned in the shell to form a cylindrical clearance therebetween, and a rotor. The rotor includes a cylindrical winding of a coil, arranged coaxially in the clearance, a commutator mechanically supporting one end of the winding and electrically connected with the coil, and a shaft for supporting the commutator. The motor further includes a pair of brushes arranged in contact with the commutator,such that an electric current is supplied via the commutator to the coil. A first bearing is mounted at an end portion of the magnet adjacent the commutator to rotatably support a first portion of the shaft, and a second bearing is mounted adjacent one end of the shell to rotatably support a second portion of said shaft.

REFERENCES:
patent: 3475632 (1969-10-01), Moresi
patent: 3514654 (1970-05-01), Moresi
patent: 3604962 (1971-09-01), Larson
patent: 4327304 (1982-04-01), Aoki
patent: 4337568 (1982-07-01), Morisawa
patent: 4794392 (1988-12-01), Selinko
patent: 5107155 (1992-04-01), Yamaguchi
patent: 5270602 (1993-12-01), Takehara
patent: 5347187 (1994-09-01), Tsuzaki et al.
patent: 5621260 (1997-04-01), Fukuoka et al.

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