marsie Posted January 19, 2007 Share Posted January 19, 2007 Does anyone know what component(s) of an electric motor determine if its 12 or 24v??? Paul Quote Link to comment Share on other sites More sharing options...
simonb Posted January 19, 2007 Share Posted January 19, 2007 Does anyone know what component(s) of an electric motor determine if its 12 or 24v??? Paul A 12 and 24v motor are physcially the same, its the wire gauge of the windings which determine if its 12 or 24v. If you are unsure try it on 12v first. If its actually designed to run on 24v it will run at about half speed - it will be obvious. You will probably if its a small motor (but not a starter or winch motor) be able to stop the shaft by hand. If its a 12v one it will run at its full speed, again it will be obvious. Quote Link to comment Share on other sites More sharing options...
marsie Posted January 19, 2007 Author Share Posted January 19, 2007 the reason i ask is that i have got several winch motors(12&24v) and i wondered if the voltage could be altered by swapping certain components Another reason is that i have a winch for sale with a brand new motor fitted.But i could sell it for much less if i fitted a second hand motor.Unfortunately the only suitable motor i have has got a sh*gged splined shaft,but i have got a 24v center that is ok?? Quote Link to comment Share on other sites More sharing options...
simonb Posted January 19, 2007 Share Posted January 19, 2007 the reason i ask is that i have got several winch motors(12&24v) and i wondered if the voltage could be altered by swapping certain components Another reason is that i have a winch for sale with a brand new motor fitted.But i could sell it for much less if i fitted a second hand motor.Unfortunately the only suitable motor i have has got a sh*gged splined shaft,but i have got a 24v center that is ok?? You can't swap the rotating centre between a 12v and 24v motor. If its got permanent magnets in the case you can probably swap the cases. If its got electromagnets in the case you cannot swap between 12 and 24v. Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted January 19, 2007 Share Posted January 19, 2007 I thought winch motors were series wound jobbies.... In which case, electricaly at least, you can swap the rotor, and field coils from one to the other. In reality though, it is a question of if there is anything physically different (other than the number of turns etc...). Really it is only the case that would be left. If you really want to do it without having to look up everything about electrical machines, take it to a motor/altenator specialist. They will be able to sort it. Quote Link to comment Share on other sites More sharing options...
simonb Posted January 19, 2007 Share Posted January 19, 2007 I thought winch motors were series wound jobbies....In which case, electricaly at least, you can swap the rotor, and field coils from one to the other. In reality though, it is a question of if there is anything physically different (other than the number of turns etc...). Really it is only the case that would be left. If you really want to do it without having to look up everything about electrical machines, take it to a motor/altenator specialist. They will be able to sort it. Field magnets can be series or parallel connected to the armature, or can use permanent magnets like in a wiper motor. You cannot swap any windings from one voltage to a motor running on another. The windings are specific to the voltage, it determines the current through armature and stator (if it is electromagnet) and hence speed and power output of the motor. Quote Link to comment Share on other sites More sharing options...
marsie Posted January 19, 2007 Author Share Posted January 19, 2007 Hmm,think i will just try and get a good secondhand motor to fit to my winch to be on the safe side thanks guys Paul Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted January 19, 2007 Share Posted January 19, 2007 Field magnets can be series or parallel connected to the armature, or can use permanent magnets like in a wiper motor. You cannot swap any windings from one voltage to a motor running on another. The windings are specific to the voltage, it determines the current through armature and stator (if it is electromagnet) and hence speed and power output of the motor. Am I missing something here? If you swap all the windings from one motor to another, then the motor will change voltage. In the case of the broken shaft above, assuming the windings can be removed from the shaft without physically unwinding them (cos otherwise it would just be a pain) then the 24v centre could be used with the 12v rotor windings in a 12v motor. However, I have only met a few motors where you would be able to do this (where the shaft slides out of the centre of the rotor)...and I have never taken apart a winch motor. Either way, it is quite involved. Might be cheaper and easier just to get the correct motor in the first place! Quote Link to comment Share on other sites More sharing options...
simonb Posted January 20, 2007 Share Posted January 20, 2007 Am I missing something here? If you swap all the windings from one motor to another, then the motor will change voltage.In the case of the broken shaft above, assuming the windings can be removed from the shaft without physically unwinding them (cos otherwise it would just be a pain) then the 24v centre could be used with the 12v rotor windings in a 12v motor. However, I have only met a few motors where you would be able to do this (where the shaft slides out of the centre of the rotor)...and I have never taken apart a winch motor. Either way, it is quite involved. Might be cheaper and easier just to get the correct motor in the first place! You can't remove the shaft from a (most) motor(s) without removing the windings, its all effectively 1 part. Quote Link to comment Share on other sites More sharing options...
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