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colors and become broken.
brush and commutators is too big; the mica between
different commutators extrudes; the brush is made
by wrong materials; the brush is wrong in type.
5
Sparking.
The motor is over-loaded; the commutators are not
clean, not round or not smooth; mica or some
commutators extrude; the brush is not ground
properly; the brush is big in pressure; the brush is
wrong in type; the brush is jammed in the brush
holder; the brush holder become loose or vibrating;
the polarity and sequence of magnetic poles become
wrong.
6
The brush and its wires get
hot.
Sparking of the brush; poor contact between brush
and soft wires; small section area of soft wires.
7
The brush is noisy.
The surface of the commutators is not smooth.
Speed Controller Maintenance
The speed controller of the vehicle uses high frequency MOS technology to accomplish the control of speed, torque
and brake with smoothness, silence, high efficiency.
The speed controller prevents the vehicle from running way when starts. When the vehicle starts, the controller
will inspect the signal from the accelerator; if signal exceeds 20%, the HPD (protection unit in the controller) will
prohibit the output of controller.
When the vehicle starts, the SRO (protection unit in the controller) will effect.
The controller will self-check when the vehicle is running. If any defect is inspected, the controller will stop the
vehicle to protect the operator and the vehicle.
Periodical Maintenance:
•
Check if the contacting points of the contactor are in good condition, and check if any contact sticks or is
jammed mechanically.
•
Check if the micro switch in the accelerator can be switched on and off properly.
