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Question:

Can I run an Electric Motor with 90v DC specs on regular outlet?

I have a 90v DC electric motor I would like to run with 110v electricity. It was running off 110v when it was inside a wheel balancer. The motor came out of a wheel balancer and I need it for a specialized fan application. What kind of converter do I need to not only run it with 110v, but also make it variable speed? Any suggestions?

Answer:

If you are going to use a pulley to wind up the string, the motor polarity doesn't matter, so all you need is a twin flex from the mains adapter, it doesn't matter which way you connect the leads to the motor or the adapter. If your adapter doesn't have a twin flex coming out of it you can buy a multiconnector for DC power supplies and cut off the single power jack at the end of the lead before using the bare ends to connect to the motor. The multiconnector should have one plug which fits the adapter socket.
If its a universal motor it will run on dc or ac. Check the tag on the motor data plate. Varying the voltage or current with a correct size dimmer will work or us a frequency drive which was probabley used when it was a balancer. The freq drive converts AC to DC for precision movements or speeds.
90v Dc Motor
The wheel balancer had circuitry that reduced the start up speed and slowly brought the RPM's up to a given top speed. It also had bridge rectifiers to convert the AC current into DC current.

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