Electricity: motive power systems – Limitation of motor load – current – torque or force
Patent
1977-03-16
1979-05-22
Smith, Jr., David
Electricity: motive power systems
Limitation of motor load, current, torque or force
318433, H02P 500
Patent
active
041561627
ABSTRACT:
A system for controlling the speed-torque characteristic of a direct current motor which advantageously can be utilized to drive a surface wind machine for winding web material under controlled tension. The system generates a desired speed signal which is compared with a signal representing the actual motor speed to control a gating circuit and rectifier bridge for applying a selectively variable magnitude direct current voltage to the motor armature to cause the motor to run at the desired point on the speed-torque characteristic curve. The system generates a maximum no load speed adjustment signal which is compared with a speed adjustment signal to generate the desired speed signal. The motor armature current is sensed to generate a scaled armature current signal representing a decrease in the no load speed due to the load imposed on the motor. The system also generates a tension adjustment signal which defines a rate of decrease from the no load speed value to establish the speed-torque characteristic. The tension adjustment signal is compared with the scaled armature current signal to generate the speed adjustment signal thereby defining the slope of the speed-torque characteristic curve.
REFERENCES:
patent: 3582746 (1971-06-01), Nye, Jr. et al.
patent: 3671835 (1972-06-01), McMenamy
patent: 3697844 (1972-10-01), Dinger
patent: 3716772 (1973-02-01), Larson
patent: 3781620 (1973-12-01), Toth
patent: 3887855 (1975-06-01), Kilmo
Jenkins Michael W.
Warfield Glenn R.
Dana Corporation
Smith Jr. David
LandOfFree
Winder motor 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 Winder motor control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Winder motor control system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1042628