There are many methods to prevent motor burnout, encompassing both mechanical and electrical aspects. First, let's discuss external factors such as mechanics and working environment.

1.Working Environment: The motor should operate in a dry, ventilated, and pollution-free environment. Keep the motor exterior dry, clean, and well-ventilated. Regularly check if the cooling fan of the motor is in good condition and there are no damages or cracks. Ensuring the motor operates in a conducive environment is critical because overheating is the primary cause of motor burnout.

2.Maintenance According to Manufacturer's Instructions: Regularly inspect the motor bearings and bearing end caps for oil shortage or wear. Timely replenish lubricant and repair worn end caps.

3.Load: Collaborate with mechanics to check if the mechanical load is excessive. Overloading can easily lead to motor overheating. There have been instances where mechanical loads were unstable or even frequently jammed. Although thermal overload relays were in place for protection, workers would increase the set current of the relay to maintain continuous operation, causing the motor to always operate at high temperatures, accelerating insulation aging and leading to motor burnout. Subsequently, switching to a clutch-type belt pulley and adjusting the transmission force distance resolved the issue. When the transmission force exceeded the limit, the belt pulley would slip, keeping the motor within its power output range and mechanically ensuring the motor was not overloaded.

Next, protecting the motor through its control circuit:

Thermal Overload Protection Relay: This is the most common form of protection, but it has poor sensitivity and reliability. Variations in load or intrinsic motor issues can cause excessive current. By the time the thermal overload relay activates, the motor could already be overheating, which degrades its insulation performance.

Before the Thermal Overload Relay, Incorporate a Motor Protector: Adjust its set current to the motor's rated current. Used in conjunction with a thermal overload relay, this offers dual protection and is effective for low-power motors.

Comprehensive Motor Protector: This device offers protection against a wide range of issues such as overload, overcurrent, phase loss, short circuit, under-voltage, over-voltage, locked rotor, phase imbalance, and ground faults, among others. It has been very effective in practice, with few instances of motor burnout. Highly recommended for use.

By addressing both mechanical and electrical factors, these methods significantly reduce the risk of motor burnout, ensuring longer operational life and greater reliability of the motor.