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5. SME three-phase AC motor
5.1 General description
The power system of three-wheel electric forklift truck is composed of two three-phase
AC drive motors (6.5kw) and one three-phase AC lifting motor (12kw). It's with function of
speed sensor, temperature sensor, simple construction, reliable performance, free of
maintenance. The three-phase AC motor is composed of stator, rotor, speed encoder and
temperature sensor.
1. Front cover
4. Support cap
7. Rear cover
5.2 Operating environment
(1) Elevation is lower than 1200 meters.
(2) Air temperature ranges between -25℃ and +40℃.
(3) Relative humidity is 100%.
5.3 Daily inspection and maintenance
(1) Always keep clean and no water, oil pollution or dust in the motor.
(2) Check the bearing for heat or leakage.
(3) The load current of the motor can't be over rated current.
(4) If there is friction, scream or other noise, stop working at once, after removing the
failure, the motor will keep on working.
Structure of AC motor
2. Bearing
3. Temperature sensor
5. Stator
6. Rotor
8. Gear sensor 9. Speed sensor
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