Jump to content
Electronics-Lab.com Community

Protecting the motor


Recommended Posts

Hi,
I am using a motor for a particular task. I want the motor to stop if their is heavy obstruction/retardation to its motion so as to protect it from damage.

( By the way I am assuming that it will be damaged if motion is attempted in such case, is that true? or does it just switch off if it receives such heavy obstruction ??? )

The motor is a small DC motor with torque=2kN.
It has only two i/p wires across which a potential difference of 5V (or 12V) when applied causes the motor to run, (the polarity of potential deciding direction of motion i.e. clockwise/anticlockwise).

[glow=red,2,300]Pleeeeeeease [/glow] do pitch-in your suggestions.
THANKS in advance.

Link to comment
Share on other sites


Thanks for your help guys, but a polyswitch aint feasible bcos .... actually it isn't available in the local market and ordering it from net isn't possible.

But the idea, you all suggested, of using the rise in current during overload to trigger a ckt. break and again close ckt. after certain delay is great. This I plan to put to use in some way.

Soooo......
I am thinking for building something transistorised in nature.
You must be knowing the principle of "FOLDBACK CURRENT LIMITING" usually used for overload protection in transistorised regulators.
Wellll......
I am thinking whether a similar circuit arrangement is possible over here ?????

Right now, we are trying to design something on similar line....

Incase anyone knows where we might get such a circuit readymade .... it would be useful.
                            OR
If someone has an experience in building something of similar type they could help us with the ckt. design...... or atleast suggest the components.


Any suggestions ?????

By the way we are thinking on the right line right ???

Link to comment
Share on other sites

Perhaps you can get PTC resistors where you live; they act similar to the PolySwitch if you find a suitable value for your motor (not as good but it works)!
Fold back current limiting is not the best choice for a motor circuit, this will not trip the circuit and if the motor gets jammed it will fry in a while.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
  • Create New...