Jiangsu Niu Electric Technology N1S, Operation & Maintenance Manual

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小牛电动
Niu Electric
- 57 -
Motor/controller/Hall cable sensor
Maintenance Information
Overview
。
The motor used in this scooter is an efficient brushless DC motor with a permanent magnet made of rare
earths, which is integrated with the rear wheel.
The motor does not require maintenance in daily operating. However, attention should be paid to the
status of installation and tightening nuts on the motor shaft.
The motor is integrated with the rear wheel. Attention should be paid to inspection of the tire pressure
during maintenance. Driving at an insufficient tire pressure will cause damages to the motor hub.
The motor should be stopped immediately when the motor is abnormally hot, smoking, smelling
abnormally, sounding abnormally or has other abnormal conditions.
Check the battery for normal performance and make it charged fully before maintenance of the motor
system.
Check the Hall cable sensor connector, Hall motor connector and controller connector for shorting due to
moisture, looseness or bad contact before maintenance of the motor system.
Attention should be paid to proper maintenance of the motor system and appropriate protection
measures for avoidance of the electric shock, since the high current and voltage are involved.
The Hall cable sensor and Hall motor sensor should be inspected for shorting before replacement of the
damaged controller with a new one, otherwise the new controller that has been installed will get
damaged again.
The motor temperature rises higher and faster in a high-altitude area than in a plain area. Thus the
scooter operating for a long time will easily result in the situation where the motor becomes abnormally
hot and even the motor fails.
Pay attention to the wire polarity in installing the battery or controller.
Technical parameters
Item Specifications
Motor
Motor type Brushless permanent-magnet motor
Control method FOC vector control
Rated voltage DC60V
Rated power 1200W 1500W
Maximum motor power 2000KW 2400w
Maximum motor torque 110N*m 120N*m
Controller
Rated voltage DC60V
Undervoltage protection 52±1V
Maximum current of the controller 35A 40A
Failure elimination
The instrument has no indication. The motor does not rotate.
1. Inspection of the air switch
Is the air switch closed or does the fuse get melted?
Yes
- the instrument is shorted.
The scooter cable is broken or shorted.