D.C. multi-phase bi-polar brushless motor

Details D.C. multi-phase bi-polar brushless motor D.C. multi-phase bi-polar brushless motor

1986-06-06

1988-03-08

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02K 2908

Patent

active

047301503

ABSTRACT:
A D.C. multi-phase brushless motor having M phase stator windings and an N pole rotor, with M and N being integers, a sensor for sensing rotor position and providing rotor position signals to a motor controller is disclosed. The sensor comprises a circular permanent magnet, mounted externally to a motor at one end of a rotor with the magnet having N poles, and M sets of paired Hall effect devices, mounted adjacent the magnet, wherein each of the M sets of paired Hall effect devices are mounted in adjustable relationship to the magnet with respect to radial and angular distance. The sensor is mounted within a housing mounted externally to an end of a motor adjacent the rotor end having the magnet mounted thereon with the M sets of paired Hall effect devices mounted within and upon the housing in adjustable relationship with the magnet.

REFERENCES:
patent: 4283664 (1981-08-01), Ebert
patent: 4353016 (1982-10-01), Born
patent: 4417186 (1983-11-01), Hirose et al.
patent: 4484115 (1984-11-01), Takahashi

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