Variable speed variable torque brushless DC motor

Details Variable speed variable torque brushless DC motor Variable speed variable torque brushless DC motor

1989-03-07

1990-01-30

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02P 602

Patent

active

048975834

ABSTRACT:
A variable speed variable torque brushless DC motor (32) having at least one position sensor (34) with each position sensor producing a position signal indicating position of the rotor and having a frequency equal to a frequency of excitation current applied for activating stator windings in accordance with the invention includes a pulse generator (36) for producing first pulses having a frequency which is equal to nf where n is the number of position sensors and f is the frequency of excitation current; a source (39) of a first signal having a frequency f1 wherein f1.gtoreq.f; a source (41) of a variable frequency second signal having a frequency f2 with f2.gtoreq.f1; an excitation circuit (48) for applying excitation current pulses to the stator windings with the excitation current pulses occurring in response to position signals produced by the at least one position sensor; a delay circuit (38, 40, 42, 44 and 46) responsive to the first pulses, the first signal and the second signal for delaying the application of the position signals to the excitation circuit the delay being equal to mf1
f2 with m being an integer.

REFERENCES:
patent: 4097788 (1978-06-01), Nygaard et al.
patent: 4127799 (1978-11-01), Nakamura et al.
patent: 4258299 (1981-03-01), Takeda et al.
patent: 4720663 (1988-01-01), Welch et al.
Publication, "Solid State Control of Ultra High Speed Compressor Motor", Rees et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1925219