During the actual operation of electric stage hoists, motor overheating may occasionally occur. This issue not only disrupts the normal operation of the equipment but also, if not addressed promptly, may accelerate the aging of internal motor components, damage the winding coils, and even trigger safety hazards such as circuit faults and equipment shutdowns. Therefore, once overheating signs are detected-such as an abnormally high temperature on the motor housing, unusual odors, or a significant increase in operational noise-operators must immediately stop all hoisting operations, cut off the power supply, and conduct a systematic inspection. Only after identifying and completely resolving the root cause can the equipment be put back into use.
The first aspect to investigate is operational irregularities, with overloading being the primary cause of motor overheating. Each electric stage hoist is clearly marked with a rated load capacity, a parameter precisely determined based on the performance of core components including motor power, transmission structure, and braking system. If the rated load is disregarded during operation and the hoist is forced to lift loads exceeding the limit, the motor will be subjected to overloaded operation: on one hand, the motor's output power will far exceed the design standard, leading to a sharp rise in current and a large amount of electrical energy being converted into heat energy; on the other hand, overloading will intensify the frictional resistance of transmission gears, bearings, and other components, further increasing the motor's load and ultimately causing rapid temperature rise of the motor in a short period. Even short-term, intermittent overloading can cause irreversible cumulative damage to the motor. Thus, strictly adhering to the rated load specifications is the key to preventing such overheating issues.