Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1986-09-22
1988-03-22
Salce, Patrick R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 68R, 310193, 310254, H02K 2114
Patent
active
047331194
ABSTRACT:
A 1-phase coreless disk-type brushless motor or axial-flow brushless fan motor comprises a single position-detecting element located at a position on a printed circuit board corresponding to one of the magnetically active conductor portions of a stator coil or coils of the stator armature. A cogging-generating stator yoke having a cutaway portion of a specifically determined angular width is positioned relative to the stator coils, such that an end of the cutaway portion thereof is spaced by a distance equal to about one fourth of the pole width from another magnetically active conductor portion of the stator coils, so that the magnet rotor may stop at a position from which the motor can start itself. Various forms of such cogging generating stator yoke are disclosed, including a stator yoke which also serves as a circuit board.
REFERENCES:
patent: 3840761 (1974-10-01), Muller
patent: 4620139 (1986-10-01), Egami et al.
Miyao Osami
Shiraki Manabu
Rebsch D. L.
Salce Patrick R.
Shicoh Engineering Co. Ltd.
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