Hi. Do you have motor troubles? there are three main problems that happen with scooter motors.
The first is when the brushes get stuck in the brush holders, and don't contact the commutator properly. This makes the machine judder and stop, but it will sart again if given a push, but will still judder. The brushes get stuck because they arc on the sides of the brush holders. Usually because the plastic caps that hold them in aren't tight enough. Be careful tightening these caps because they are easily cracked. By using a multi-meter, the resistance through the motor should be about 1 ohm.
The second problem with motors is if they have done a lot of work, they develope a build up of carbon and copper dust of the brushes and commutator. The use of an insulation resistance tester will tell if this is a problem, but unplug the motor from the controller before doing this test. This problem will cause shorts, and cause the wrong feed-back to the controller.
The third problem is a shorted or burnt out armature. Usually causes a lack of power, high current draw, and a lot of heat. Sometimes you can smell the burnt varnish.
Of the three main problems, probably a stuck brush is the most common. It is possible that a faulty brake solenoid can also cause problems. Burnt-out coil or stripped centre of the brake lining are common.
Answers & Comments
Hi. Do you have motor troubles? there are three main problems that happen with scooter motors.
The first is when the brushes get stuck in the brush holders, and don't contact the commutator properly. This makes the machine judder and stop, but it will sart again if given a push, but will still judder.
The brushes get stuck because they arc on the sides of the brush holders. Usually because the plastic caps that hold them in aren't tight enough. Be careful tightening these caps because they are easily cracked. By using a multi-meter, the resistance through the motor should be about 1 ohm.
The second problem with motors is if they have done a lot of work, they develope a build up of carbon and copper dust of the brushes and commutator. The use of an insulation resistance tester will tell if this is a problem, but unplug the motor from the controller before doing this test. This problem will cause shorts, and cause the wrong feed-back to the controller.
The third problem is a shorted or burnt out armature. Usually causes a lack of power, high current draw, and a lot of heat. Sometimes you can smell the burnt varnish.
Of the three main problems, probably a stuck brush is the most common. It is possible that a faulty brake solenoid can also cause problems. Burnt-out coil or stripped centre of the brake lining are common.
Hope this helps. Neil.