Sensorless brushless motor

Details Sensorless brushless motor Sensorless brushless motor

1991-10-22

1993-01-26

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02P 602

Patent

active

051824990

ABSTRACT:
In a sensorless brushless motor which does not have a position sensor for detecting a rotational position of a rotor, the rotational position thereof is detected by detecting the zero-crossing points of the counter electromotive forces induced in the stator windings of the rotor. A shaping signal obtained by detecting the zero-crossing point of each of the counter electromotive forces and a slant waveform signal generated in response to the shaping signal thus obtained are combined to form a trapezoidal waveform position signal, and an electric current of a trapezoidal waveform is supplied in response to the position signal thus obtained to the corresponding one of the stator windings, so that the electric current commutation of the stator windings can be performed smoothly. As a result, the motor can be practically driven with reduced vibration and noise generation.

REFERENCES:
patent: 4162435 (1979-07-01), Wright
patent: 4712050 (1987-12-01), Nagasawa et al.
patent: 4912378 (1990-03-01), Vukosavic
patent: 4922169 (1990-05-01), Freeman
patent: 4928043 (1990-05-01), Plunkett
patent: 5019756 (1991-05-01), Schwarz
patent: 5057753 (1991-10-01), Leuthold et al.
patent: 5095254 (1992-03-01), Ueki

Affiliated with

Also associated with

Rating

Sensorless brushless 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 Sensorless brushless motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sensorless brushless motor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1414651