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

1998-03-23

1999-03-30

LaBalle, Clayton

Electrical generator or motor structure

Dynamoelectric

Rotary

310 68B, 310156, 310254, H02K 700, H02K 714

Patent

active

RE0361682

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: 3634873 (1972-01-01), Nishimura
patent: 3840761 (1974-10-01), Muller
patent: 3860843 (1975-01-01), Kawasaki et al.
patent: 3873897 (1975-03-01), Muller
patent: 4092572 (1978-05-01), Murata
patent: 4099104 (1978-07-01), Meller
patent: 4167692 (1979-09-01), Sekiya et al.
patent: 4417167 (1983-11-01), Ishii et al.
patent: 5832853 (1995-01-01), Von Der Heide et al.
Kobayashi et al. "Direct Drive system for Isolated Loop Drive", National Technical Report, vol. 22 No. 4, Aug. 1976.
Brushless DC Disc Drive Spindle. "Sextant", Rotron, Inc., Woodstock, NY, Nov. 1980.
Zweipulsige Kollectorlose Gleichstrommotoren, Papst-Motoren KG; St Goergen/Swarzwald; Germany, Jan. 1977.

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