Brushless d. c. motor

Details Brushless d. c. motor Brushless d. c. motor

1977-01-25

1978-09-19

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 67R, 310156, 318254, H02K 1100

Patent

active

041157150

ABSTRACT:
In a brushless d.c. motor with a permanent magnet rotor with the recessing of a radial narrow air gap, a part of the flux emanating from the rotor is concentrated onto a stationary magnetic flux sensitive control member which controls a commutator circuit. For concentration of the flux onto the control member, there is used a stationary magnetic flux conductor which extends between unlike rotor poles under recessing of a narrow air gap on both its ends. At least one of these air gaps is radially directed.

REFERENCES:
patent: 3548223 (1970-12-01), Dittrich et al.
patent: 3548224 (1970-12-01), Dittrich et al.
patent: 3644765 (1972-02-01), Janson
patent: 3805134 (1974-04-01), Osamn et al.
patent: 3961211 (1976-06-01), Verques

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