Low ripple-torque permanent magnet brushless motor

Details Low ripple-torque permanent magnet brushless motor Low ripple-torque permanent magnet brushless motor

1988-06-24

1990-04-17

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310186, 310268, H02K 2112, H02K 2900

Patent

active

049183460

ABSTRACT:
The stator comprises three phase driving coils and an electric commutator for controlling current to the driving coils. The rotor comprises permanent magnets which are alternately magnetized in N polarity and S polarity. Driving torque is generated corresponding to the current flowing through the driving coils and the permanent magnets. On the surface of the permanent magnet facing to the driving coils, two non-magnetizing portions are provided in each permanent magnet having either N or S polarity.

REFERENCES:
patent: 4562399 (1985-12-01), Fisher
patent: 4631435 (1986-12-01), McCarty
patent: 4672253 (1987-06-01), Tajima et al.

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