Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1984-10-01
1987-03-17
Shoop, Jr., William M.
Electricity: motive power systems
Switched reluctance motor commutation control
318138, 318439, H02P 602
Patent
active
046510680
ABSTRACT:
A drive circuit for a brushless motor utilizing both phase shift and current shaping to provide for efficient operation of a brushless motor in a servo control system. The circuit includes circuitry for altering the phase of the drive signal as a function of motor velocity to compensate for increased current phase lag due to inductance of the motor at high commutation frequencies corresponding to high motor velocities. In addition to altering the phase shift of the drive signal, the circuitry also alters the commutation signal waveform to compensate for a non-sinusoidal field distribution to produce a nearly sinusoidal torque from each of the brushless motor windings. The compensation of both phase shift and commutation signal waveform is accomplished using digital circuitry. The phase commutation is a non-linear function of motor velocity. The waveform compensation is selected to compensate for a trapezoidal magnetic field distribution in the motor air gap.
REFERENCES:
patent: 4223261 (1980-09-01), White
patent: 4429262 (1984-01-01), Utenick
patent: 4447771 (1984-05-01), Whited
patent: 4490661 (1984-12-01), Brown et al.
patent: 4498037 (1985-02-01), Razavi
Electro-Craft Corporation
Ro Bentsu
Shoop Jr. William M.
LandOfFree
Brushless motor control circuitry with optimum current vector co does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Brushless motor control circuitry with optimum current vector co, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Brushless motor control circuitry with optimum current vector co will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1790354