Brushless unequal poles controlled electric motor

Details Brushless unequal poles controlled electric motor Brushless unequal poles controlled electric motor

1989-05-05

1990-07-24

Wong, Peter S.

Electrical generator or motor structure

Dynamoelectric

Rotary

310186, 318138, 318439, H02K 2908, H02K 318, H02P 122

Patent

active

049437470

ABSTRACT:
A brushless unequal-pole electric motor includes a cylindrical rotor formed at least partly of a permanent magnet and rotatably installed within a casing, a plurality of field magnetic cores installed within the cylindrical rotor, field coils wound around the field magnetic cores for magnetizing the cores, and position-detecting sensors for detecting the positions of the magnetic poles of the cylindrical rotor. The sensors are connected to driving circuits for reversing the magnetic fields, to cause the rotor to rotate. The field magnetic cores generate magnetic fields of different magnitudes between the adjacent field magnetic cores, and generate magnetic fields of the same magnitude as that of the oppositely located field magnetic cores. In an alternate embodiment, the field magnetic cores surround the rotor.

REFERENCES:
patent: 3898544 (1975-08-01), Tanikoshi
patent: 4551658 (1985-11-01), Rhee
patent: 4704567 (1987-11-01), Suzuki et al.

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