Current Limiting a motor
Current Limiting a motor
(OP)
I am designing a a device that will use a 24VDC motor driven linear actuator to apply force to an object. I need to stop the actuation when the desired force is reached. This force will correspond with some current drawn by the motor. This will effectively be a limit switch activated by motor current instead of actuator position.
I would appreciate any advice on how to accomplish this!
I would appreciate any advice on how to accomplish this!






RE: Current Limiting a motor
Drive systems with an inner current (or torque) loop have settable limits for positive and negative torque. It is especially simple if you are using a 24 V DC system. No need for fancy isolation amplifiers or anything.
You may need to think about torque variations along the way. But if you are positive that the end torque is significantly higher than any torque seen along the way, it is a sure way of doing it.
Let the activated torque limit set an output to get an indication that you have reached end of travel. One output for each end position is possible.
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Current Limiting a motor
RE: Current Limiting a motor