Brushless DC motor

Details Brushless DC motor Brushless DC motor

1975-10-31

1978-12-19

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310156, 310179, 310DIG3, 318138, H02K 3700

Patent

active

041307690

ABSTRACT:
A brushless motor has a rotor composed of a permanent field magnet, an armature functioning as stator and a position detecting element for detecting the positions of magnetic poles of said permanent magnet rotor and accordingly switching the electric current to an armature coil body of said stator thereby causing rotary motion of said permanent magnet rotor. Said armature coil body contains plural coils of given number of turns in a polygonal form of which at least two sides are placed parallel to the rotary axis of motor. Said coils are mutually arranged in a partially overlapping relationship to form a cylindrical body with one of said two sides being located at the internal surface of said cylindrical body while the other side is located at the external surface thereof so as to compose a coreless cylindrical armature body.

REFERENCES:
patent: 3018395 (1962-01-01), Carlstein
patent: 3529192 (1970-09-01), Davies
patent: 3541361 (1970-11-01), Nola
patent: 3548223 (1970-12-01), Dittrich
patent: 3548224 (1970-12-01), Dittrich
patent: 3644765 (1972-02-01), Janson
patent: 3805134 (1974-04-01), Osamu
patent: 3845334 (1974-10-01), Harada

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