Method of controlling a brushless DC motor

Details Method of controlling a brushless DC motor Method of controlling a brushless DC motor

2005-10-28

2010-11-16

Benson, Walter (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S400010, C318S400420

Reexamination Certificate

active

07834565

ABSTRACT:
A method of controlling a brushless DC motor of the type having a stator, comprising a stator winding excitable to generate a stator magnetic field, and a rotor, arranged to rotate with respect to the stator and comprising permanently magnetized material arranged to generate a rotor magnetic field to interact with the stator magnetic field to produce rotation of the rotor. The method comprises the steps of driving current through the stator winding to generate a stator magnetic field to interact with the rotor magnetic field, detecting rotor position with respect to the stator, and cyclically commutating the stator winding current according to rotor position as the rotor rotates. Each commutation cycle includes a drive portion during which current is driven through the stator winding in one sense and at the end of which the driving of current in said sense is ceased. The method further comprises the steps of during an initial portion of each drive portion, driving current through the winding such that the magnitude of the winding current increases and during an end portion of each drive portion, actively reducing the magnitude of the winding current.

REFERENCES:
patent: 5115174 (1992-05-01), Masuda et al.
patent: 6982534 (2006-01-01), Hahn et al.
patent: 7053583 (2006-05-01), Hazelton
patent: 7141943 (2006-11-01), Song et al.
patent: 1529834 (1978-10-01), None
patent: 2365531 (2002-02-01), None

Affiliated with

Also associated with

Rating

Method of controlling a brushless DC motor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of controlling a brushless DC motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of controlling a brushless DC motor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4248270