Browse Prior Art Database

Speed Control of a D.C. Motor

IP.com Disclosure Number: IPCOM000097448D
Original Publication Date: 1962-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Bilsback, MS: AUTHOR [+2]

Abstract

In this motor speed control system, a D.C. motor speed is controlled and varied by a variable frequency pulse source.

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Speed Control of a D.C. Motor

In this motor speed control system, a D.C. motor speed is controlled and varied by a variable frequency pulse source.

The speed of the D.C. motor, which has a printed circuit armature 1, and a tape 2 is controlled by applying varying periods of forward, reverse or no torque to the motor through driver 3. The desired motor speed is controlled by the frequency of pulses from generator 4. The actual motor speed is indicated by pulses generated by the interruption of light through disk 5. If the actual motor speed equals the desired speed, the frequency of the pulses from generator 4 matches the frequency of pulses from disk 5 through amplifier 6.

Depending on the derivation of these two frequencies and the sequence of pulses from generator 4 and disk 5, a 0 degree trigger 7 and a Stop trigger 8 are turned on and off. Such apply varying periods of forward or reverse torque, respectively, to the motor.

Once the desired speed is reached, forward torque is applied by Go trigger 7 through the driver 3 only for periods sufficient to maintain the desired speed.

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