小牛电动
Niu Electric
- 62 -
Connection: black (+) - negative battery pole (black) (-)
Normally the connectivity between both should be available.
Inspection of the input circuit to power supply
Turn the ignition switch to OFF.
Disconnect the Hall motor connector.
Turn the ignition switch to ON. Check the voltage between the red wire and the negative battery pole at
harness side.
Connection: Red (+) - negative battery pole (black) (-)
Standard: 5V
Check the following items if the measurement value is far more than the standard one:
- The controller failed
- The circuit between controller and Hall motor is in a bad contact or is open.
Controller
System introduction
The controller for this model makes controlling in the way that it receives the signal from speed
regulation handle and controls operation of the brushless DC motor.
Main protective functions
1. Current limit protection
The maximum controller output current is limited to protect the motor, controller, battery and other
components from being damaged by a current greater than specified.
2. Rotation failure (overload) protection
The controller judges the motor status automatically in a certain period of time after the motor rotation
failure (over-current) occurs. It controls automatically the output current to protect safety of the motor,
controller and battery.
3. Under-voltage/over-voltage protection
The controller stops automatically the motor rotation when the input voltage to motor is lower or higher
than the set value, in order to protect safety of the motor and extend the battery lifetime.
4. Power cut-off protection in charging or braking
The controller stops the motor automatically to avoid unexpected injuries when the vehicle is being
braked or charged.
5. Control loss protection
The controller stops the motor automatically to avoid unexpected injuries when the Hall cable sensor or
its circuit fails and is out of control. The functions such as motor temperature protection, controller
temperature protection and motor winding short protection are also provided.
Removal/installation
Remove the storage box on rear seat cask
Disconnect the battery. Turn the ignition switch and air switch to OFF.
Disconnect connectors on the controller.
Remove 4 installation bolts and the ground wire.
Remove the controller.
Perform the re-installation in the opposite sequence to the removal.
Summary of Contents for N1S
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