Brushless motor with center leads for preventing signal distorti

Details Brushless motor with center leads for preventing signal distorti Brushless motor with center leads for preventing signal distorti

1986-08-04

1988-04-12

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 71, 439 78, H02K 1500, H02K 2112, H02K 1100

Patent

active

047376759

ABSTRACT:
In a brushless motor, a rotor magnet comprises a main magnetizing member with alternate N-poles and S-poles and a subsidiary magnetizing member for detecting rotational speed disposed at an inner side and having N-poles and S-poles arranged at a smaller pitch in comparison to the main magnetizing member. A stationary plate is provided with stator coils opposed to the main magnetizing member and a detecting substrate has a pattern in opposition to the subsidiary magnetizing member for detecting rotational speed. The detecting substrate is installed on the stator coils, and leads from the detecting substrate extend through the center of the stationary plate towards the rear side thereof, to avoid the signal distortion of prior art designs.

REFERENCES:
patent: 2706697 (1955-04-01), Eisler
patent: 4111510 (1978-09-01), Zurcher
patent: 4260920 (1981-04-01), Nakamura et al.
patent: 4366405 (1982-12-01), Schmider
patent: 4455516 (1984-06-01), Furusho
patent: 4476404 (1984-10-01), Bygdnes
patent: 4578606 (1986-03-01), Welterlin

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