Integral coaxial commutation and rotor magnets and apparatus and

Details Integral coaxial commutation and rotor magnets and apparatus and Integral coaxial commutation and rotor magnets and apparatus and

1982-09-30

1985-01-15

Shoop, William M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310266, H02K 2304

Patent

active

044940289

ABSTRACT:
An integral field and commutation magnet for use in DC brushless motor has both commutation and field magnet portions. Magnetized segments in both the field and commutation portions have oppositely oriented magnetic fields in the outward radial direction. An apparatus and method for making the one piece integral field and commutation magnet employ a fixture with a current conductor associated with magnetic flux paths corresponding to the segments of the commutation and field magnet portions to magnetize a single piece of permanently magnetizable material.

REFERENCES:
patent: 3164735 (1965-01-01), Lichowsky
patent: 3299335 (1967-01-01), Wessels
patent: 3484635 (1969-12-01), MacKallor, Jr.
patent: 3493831 (1970-02-01), Roberts, Sr.
patent: 3840761 (1975-10-01), Muller
patent: 4009406 (1977-02-01), Inariba
patent: 4197475 (1980-04-01), Ban et al.
patent: 4260920 (1981-04-01), Nakamura et al.
patent: 4311933 (1982-01-01), Riggs et al.
patent: 4322666 (1982-03-01), Muller
Japanese document entitled "Two-Phase Transistor Motor" made by Matsushita.

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