Constant speed electric motor

Electricity: motive power systems – Switched reluctance motor commutation control

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

318138, 318439, H02P 602

Patent

active

042789214

ABSTRACT:
A constant speed brushless D.C. motor of the permanent magnet outside rotor type with an internal stator wired in quadrature having a pair of Hall effect switches one of each mounted in proximity to one of a pair of opposite stator wirings to sense the direction and phrase relationship of the field in the rotor, a coarse feedback loop sensing back electromotive force in said motor including first comparator for comparing the negative generated motor voltage and motor potential said Hall effect switches operating under the influence of said first comparator to control power to said motor and thereby control its speed, a fine speed control loop including a tachometer for generating electrical pulses in proportion to motor speed upon rotation of said rotor, counter means counting said pulses and a second comparator connected to said counter means for comparing the frequency of said electrical pulses having a given frequency and the electrical pulses representing a steady desired preset motor speed providing a balancing potential difference at said second comparator thereby achieving a frequency lock to lock in the motor speed. An electrical dynamic brake is disclosed.

REFERENCES:
patent: 3896357 (1975-07-01), Tanikoshi
patent: 3979651 (1976-09-01), Bringol
patent: 4023082 (1977-05-01), Tanikoshi
patent: 4039911 (1977-08-01), Tanikoshi
patent: 4085577 (1978-04-01), Natori
patent: 4119859 (1978-10-01), Muller
patent: 4127799 (1978-11-01), Nakamura et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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

Rate now

     

Profile ID: LFUS-PAI-O-2166679

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.