Brushless DC drive motor with external rotor for use in disc dri

Details Brushless DC drive motor with external rotor for use in disc dri Brushless DC drive motor with external rotor for use in disc dri

1990-10-03

1995-01-17

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 68B, 310156, 310184, 318254, H02K 700

Patent

active

053828534

ABSTRACT:
A brushless DC drive motor with an external rotor has three pole shoes on a substantially ring-shaped stator for each two poles on the rotor. The stator winding is commutated by a three-phase commutation network in such a fashion that first, second and third networks in the stator winding are cyclically connected to an external DC source in accordance with rotor position. Each of the networks comprises at least one stator coil wrapped around a neck of a single corresponding one of the pole shoes.

REFERENCES:
patent: 3805134 (1974-04-01), Osamu
patent: 3873897 (1975-03-01), Muller
patent: 4092572 (1974-05-01), Murata
patent: 4099104 (1978-07-01), Muller
patent: 4280072 (1981-07-01), Gotou
patent: 4286184 (1981-08-01), Kogler
Brushless DC Disc Drive Spindle "Sextant", Rorton, Inc., Woodstock, N.Y., Nov. 17, 1980.
Zweipulsige Kollerktorlosegleichstrommotoren, Papst-Motoren KG., St. Gerogen, Germany, 1977.

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