Electronic motor having a multi-pole external rotor

Details Electronic motor having a multi-pole external rotor Electronic motor having a multi-pole external rotor

1979-11-06

1981-08-25

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 68B, 310156, 318254, H02K 1100

Patent

active

042861845

ABSTRACT:
An electronic motor has a multi-pole external rotor and a multi-slot stator which is rotatable inside the external rotor. At least two magnetic field sensing elements are arranged in the vicinity of the external rotor and current supply to the stator windings is provided by a commutation device. The prior art stator was provided with obliquely set stator winding slots and involved a complicated winding technique. To eliminate this disadvantage and to be able to use slots lying parallel to the axis, the neutral field lines between each north and south pole of the external rotor are made to lie parallel to the rotor axis in the region of the magnetic field sensing elements and obliquely thereto in the region of the laminated rotor stack.

REFERENCES:
patent: 3644765 (1972-02-01), Janson
patent: 3969644 (1976-07-01), Nowak
patent: 4086519 (1978-04-01), Persson
patent: 4115715 (1978-09-01), Muller
patent: 4211963 (1980-07-01), Muller

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