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What size of the wire and how many turns to rewinding a high speed mini 4wd motor?
Wiki User
∙ 11y ago
I used to rewind slot car motors by hand.
Most of the time there is no build sheet or schematic for electric motors.
What to do is measure the diameter of the copper winding wire. You can buy it maybe at a local motor shop maybe EBay?
Then as you unwind the old. Count the windings so you can rewind it the same exactly.
After rewinding. You should be able to use a meter to test for shorts.
I masked the commutator, shaft, and outer armature. Then give it a light spray of nonconducting insulating motor winding paint. Its usualy a dark red and thick.
Wiki User
∙ 11y ago
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Why should a series motor always start with a load?
In any DC motor the speed depends inversely on the flux. Consider when starting a series motor the current flowing will be high, but the flux that the motor produces will be moderate since the series winding has less number of turns. If u start the motor without load the speed will increase. as speed increases the back emf increases. this decreases the current through the series winding and hence flux decreases and the speed further increases. Theoretically speaking the speed becomes infinite. But practically the motor will accelerate to very high speed , which will damage the motor. But if you start the motor with the load, you are actually reducing the starting speed hence the motor runs safely. Since series motors has this property it is used in trains to pull high load.
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