AC elevator speed control system

Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

318758, 318762, 318741, H02P 140

Patent

active

041811976

ABSTRACT:
A bidirectional triode thyristor is connected to an R phase of a three-phase induction motor through an up contact set and to its S phase through a down contact set. A full-wave rectifier bridge including four diodes is connected across the R and S phases to be enabled during deceleration of the motor. The thyristor is controlled by an R-to-S phase firing circuit responsive to a command acceleration signal during acceleration of the motor and a difference signal between a command deceleration signal and an actual speed signal for the motor during deceleration of the motor.

REFERENCES:
patent: 3805133 (1974-04-01), Hatakeyama et al.
patent: 3860093 (1975-01-01), Mitsui et al.
patent: 3876918 (1975-04-01), Komuro et al.
patent: 3918552 (1975-11-01), Kameyama et al.
patent: 3921046 (1975-11-01), Anzai et al.
patent: 4072212 (1978-02-01), Terazono et al.
patent: 4083431 (1978-04-01), Oohira 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

AC elevator speed control system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with AC elevator speed control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and AC elevator speed control system will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2116331

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