Question about Electric Mobility Mobility Electric Power Scooter Wheelchair. Heavy Duty
Hi. I have had this fault on a few machines, but its not always the same problem.
When scooter motors have done a lot of work, they develope a build up of carbon dust from the brushes. This dust can cause a short or the commutator might be slightly out of round, causing the brushes to vibrate or bounce. The electronic controller is always monitoring the speed of the armature, and if this signal is interupted, the the controller can shut down the motor. Test the motor with a multi-meter on OHM's, from one of the brushes to the frame of the motor. If there is no circuit, then there is no build up of carbon. If there is a circuit, then you might need to overhaul the motor.
Also check the battery lead connectors, and the motor lead connectors. I have had to remove many of these for bad connections. Really bad connections will have burnt or melted the plastic housings.
Good luck. Neil.
Posted on Jun 17, 2010
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Posted on Jan 02, 2017
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