Permanent magnet brushless d.c. motor with hall switch...

Details Permanent magnet brushless d.c. motor with hall switch... Permanent magnet brushless d.c. motor with hall switch...

H - Electricity

02

K

310/40, 318/96

H02K 11/00 (2006.01) H02K 29/08 (2006.01)

Patent

CA 1152142

24288 ABSTRACT OF THE DISCLOSURE A D.C. brushless motor with a permanent magnet rotor employs Hall switches to effect commutation. The rotor magnets are of a greater axial length than the stator stack and the Hall switches are mounted on a printed circuit panel within the motor frame so as to be actuated by the fringe flux from the portion of a rotor magnet extending beyond the stator stack. The pole faces of the stator stack are stepped to assure proper starting and direction of rotation. A voltage regulating circuit forming part of the commutating arrangement on the printed circuit panel enables the same circuit to be used for a range of stator energizing voltages.

374739

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