Brushless motor commutation and control

Details Brushless motor commutation and control Brushless motor commutation and control

2007-10-23

2007-10-23

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C318S254100, C318S132000, C310S06800R, C310S06800R, C310S06800R, C310S232000, C310S233000

Reexamination Certificate

active

11423602

ABSTRACT:
A commutation apparatus drives a brushless motor having a stator equipped with a plurality of coils and a rotor. The commutation apparatus comprises a rotatable commutator shaft, two or more conducting rings carried discretely about the shaft, and two or more conducting segments carried discretely about the shaft at staggered positions along or near a plane perpendicularly intersecting the shaft. Each conducting segment is electrically connected to one of the conducting rings. Two or more electrical source contacts are provided for rotatably connecting a power supply across pairs of the conducting rings. A plurality of electrical load contacts is further provided for sequentially, rotatably connecting the conducting segments to discrete coils of the brushless motor. In particular embodiments of the commutation apparatus, a magnetic coupling is employed for rotatably coupling the commutator shaft to the rotor of the brushless motor, and a pressure-bearing container is provided for rotatably supporting the commutator shaft and the coupling therein.

REFERENCES:
patent: 5962946 (1999-10-01), Kobman et al.
patent: 6239531 (2001-05-01), McGaughey
patent: 6667564 (2003-12-01), Bui
patent: 6753634 (2004-06-01), Rehder
patent: 7239098 (2007-07-01), Masino
patent: 2006/0175064 (2006-08-01), Yuratich
patent: 2007/0071612 (2007-03-01), Yuratich
patent: 2007/0096571 (2007-05-01), Yuratich
patent: 01/50578 (2001-07-01), None

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