Brushless DC motor

Details Brushless DC motor Brushless DC motor

1978-01-09

1980-09-02

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310268, H02K 1100

Patent

active

042208793

ABSTRACT:
In a brushless DC motor, the rotor has a rotor shaft with a rotor yoke attached thereto and an annular rotor magnet mounted on the rotor yoke, the stator has a stator yoke with stator coils disposed on the stator yoke so as to face the rotor magnet, and two magnetic field sensing elements, such as, Hall elements, are provided for detecting the rotational position of the rotor. A printed wiring board and the stator coils are arranged on the same surface of the stator yoke so as to make the motor flat. The printed wiring board also serves as a thrust pad for the rotor shaft and provides a ground for the latter.

REFERENCES:
patent: 3060337 (1962-10-01), Henry-Baudot
patent: 3097319 (1963-07-01), Henry-Baudot
patent: 3280353 (1966-10-01), Haydon et al.
patent: 3867656 (1975-02-01), Mitsui et al.
patent: 4093897 (1978-06-01), Fujita et al.
patent: 4109170 (1978-08-01), Fujita et al.

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