Control system for an electro-magnetic brake

Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

336136, 361160, 303 20, 188158, F16D 6706

Patent

active

043262368

ABSTRACT:
A control system for providing controllable direct current power for energizing an electromagnetic brake having an alternating current power supply and a power rectifier for converting and supplying direct current power to the brake. A power switch controls the amount of direct current power supplied to the brake. A control circuit controls the actuation of the power switch and includes a brake control actuating a variable output transformer. The output from the transformer is converted to a variable pulse width signal for actuating the power switch. Preferably, the transformer is a variable ratio transformer having a movable core connected to the operator's control. A battery charger and batteries may be connected to the ouput of the power rectifier for maintaining brake power in the event of alternating current line failure. Multiple transistor power switches connected to separate brake coils maintain a portion of brake power in the event of partial equipment failure. An oscillator provides a sine wave voltage to the transformer primary and the actuation of the operator's control provides a substantially linear output from the transformer secondary. Protective circuits such as an RC filter may be connected across the power rectifier to limit overshoot upon actuation and a rectifier is connected across the brake for current flow during the time the power switch is off.

REFERENCES:
patent: 3371253 (1968-02-01), Hubbard
patent: 3538392 (1970-11-01), Carmichael et al.
patent: 3546648 (1970-12-01), Chass
patent: 3592316 (1971-07-01), Daab et al.
patent: 3614565 (1971-10-01), Mierendorf
patent: 3909075 (1975-09-01), Pittet, Sr. et al.
patent: 3958835 (1976-05-01), Rothfusz et al.
patent: 3967863 (1976-07-01), Tomecek et al.
patent: 3994348 (1976-11-01), Schowalter

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

Control system for an electro-magnetic brake does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control system for an electro-magnetic brake, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control system for an electro-magnetic brake will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1265863

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