| Gallery, Projects and General > How do I?? |
| how to check a motor |
| (1/5) > >> |
| NormanV:
I have acquired a rather nice 3 phase motor that has a built in switch that will give 2 speeds and forward and reverse. I don't have a 3 phase supply. How can I check that the motor is OK before I invest any time or, more importantly money, into it? Thanks, Norman |
| BillTodd:
use your nose. if it smells burned, it probably is. :) check the resistance of each winding or put 12vdc across each winding and feel the force on the rotor. bill |
| John Stevenson:
Norman, Not going to try and explain how to check it, far more competent people than me on this board. However how were you going to run this ? A UK two speed motor needs 440v be it from a static converter or rotary converter. They will not run from an inverter as these require the windings to be changed from star to delta and because of how a two speed motor achieves the two ranges this cannot be done. Basically just a heads up before you get too deep into a project. |
| NormanV:
Thanks for that info John. The motor came attached to some equipment that I bought at almost scrap price and I was hoping to use it on the milling machine that I am building. Two speeds would be handy. Norman |
| BillTodd:
actually john, norman, you can run them from single phase 240v with a step up transformer or a specially converted step up VFD. Two speed switching can be tricky but is not impossible . however , john's caution is timely. You should seek the help of someone compitent before playing with four hundred plus volts . bill |
| Navigation |
| Message Index |
| Next page |