Load sensing, soft-braking method and apparatus using the same

Details Load sensing, soft-braking method and apparatus using the same Load sensing, soft-braking method and apparatus using the same

1993-07-16

1995-10-10

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Braking

318375, B66B 132

Patent

active

054573726

ABSTRACT:
A device for precisely stopping an induction motor includes a current transformer for sampling a power level of an alternating current power source driving the motor during run time and an AC-DC converter/sample-and-hold circuit for generating a sampling voltage signal according to the sampling. Also included is circuitry responsive to the sampling voltage signal for determining an amount of direct current necessary to induce a static magnetic field to produce a torque within a stator winding of the motor sufficient to precisely stop the motor. A silicon controlled rectifier generates the determined amount of direct current and control circuitry causes the generated current to be injected into the stator winding. The induced static magnetic field static magnetic field is sufficient to precisely stop the motor regardless of the size of the load the motor is driving because it follows the sampling voltage signal.

REFERENCES:
patent: 2173289 (1939-11-01), Staley
patent: 3908156 (1975-09-01), Anzai et al.
patent: 3986703 (1976-10-01), Brett et al.
patent: 4278150 (1981-07-01), Wehrli, III et al.
patent: 4319665 (1982-03-01), Komura et al.
patent: 4380049 (1983-04-01), Mahinen
patent: 4491197 (1985-01-01), Nishiwaki
patent: 4857818 (1989-08-01), Hobbs
patent: 5155305 (1992-10-01), Horbruegger et al.
patent: 5265701 (1993-11-01), Ogasawara et al.

Affiliated with

Also associated with

Rating

Load sensing, soft-braking method and apparatus using the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Load sensing, soft-braking method and apparatus using the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Load sensing, soft-braking method and apparatus using the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2312535