Brush-less motor using vernier structure

Details Brush-less motor using vernier structure Brush-less motor using vernier structure

2006-06-20

2006-06-20

Tamai, Karl (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S156450, C310S254100, C310S049030

Reexamination Certificate

active

07064468

ABSTRACT:
A brush-less motor includes a rotor with a magnet alternately magnetized N pole and S pole in a rotating direction, and a core with plural salient poles on which coils are wound. The core faces the magnet to form a magnetic circuit. Each one of the salient poles are toothed and provided with small teeth at an edge facing the magnet. The small teeth have a pitch corresponding to two poles of the magnet. Powering to the coil responsive to a rotor position drives the rotor. This structure substantially increases volumetric efficiency of the motor.

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