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Potentiometer problem


RoxanaRadu

Hi everyone,

Please help me out with this electronics question for a university project.

I need to get a pump running at different speeds so I ordered an electric motor, a potentiometer and a power supply adapter. I put them all together and they worked, however the potentiometer got burnt out.

These are the items:

Electric motor: https://uk.rs-online.com/web/p/dc-geared-motors/0420631/ (042-0631)

Potentiometer: https://uk.rs-online.com/web/p/dc-motor-controllers/7522009/ (752-2009)

Power adapter: https://www.amazon.co.uk/JnDeeTM-ADAPTER-Transformer-Monitors-Powering/dp/B00W3S8630/ref=pd_sbs_60_3/259-9125614-7206729?_encoding=UTF8&pd_rd_i=B00W3S8630&pd_rd_r=c94db45d-e732-4094-a04e-bf491ea10498&pd_rd_w=KlZ1r&pd_rd_wg=DRo3H&pf_rd_p=7f9048ad-9bda-4493-8578-13e4eff8da65&pf_rd_r=E45DERHGHBHYBXTQ1KVA&psc=1&refRID=E45DERHGHBHYBXTQ1KVA

And this is what happened with the controller:

 

WhatsApp_Image_2019-08-02_at_09.23_.27%281%29__b2bd2e07baeea3706f924146e591228ea3d59b49.jpg

I am trying to find where the problem is. Is the power supply not giving a non-digital dc input? Is the current rating (3A) of the potentiometer being different to 6A given by the power supply?

If you could help I would really appreciate it!

Thank you.

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