The group hoist electric hoist is a low speed electric chain hoist. The group hoist electric hoist can be lifted and lowered simultaneously by multiple units, and is widely used. In the process of using the group crane electric hoist, many users will encounter the phenomenon of the group crane hoist motor becoming hot, which not only affects the normal use of the group crane electric hoist to a certain extent, but also causes major safety accidents. Therefore, when encountering the group crane electric hoist motor becoming hot, it is necessary to find out the reason and deal with it in time. 1. Check whether the group hoist is overloaded. Overload is one of the main reasons that cause the group hoist electric hoist motor to become hot. Overtime overload will most likely burn the motor and cause major safety accidents. 2. Whether the bearing parts of the group hoist electric hoist motor are damaged. The allowable temperature of the outer ring of the bearing should not exceed 95°C when the motor is running. If this value is exceeded, the temperature of the motor bearing is too high, also known as motor bearing heating. Bearing heating is one of the most common faults of motors. If it is light, the grease will be diluted and leak out, and if it is heavy, the bearing will be damaged. 3. Poor assembly of the two end covers or bearing covers of the group hoist electric hoist motor. 4. The air gap between the stator and rotor of the group hoist motor is very small, which causes the collision and heating between the stator and rotor. 5. The power supply voltage of the group hoist electric hoist is high, and the excitation current increases, causing the motor to heat up. 6. Almost half of the motors of the group hoist electric hoist are burned due to the lack of phase operation of the motor. 7. The abnormal vibration or noise of the group hoist electric hoist motor can easily cause the motor to heat up.