What to do if a blower motor overheats and causes the system to shut down?

Blower motor overheating is a common malfunction in industrial ventilation systems, usually triggering a safety shutdown to prevent further damage. Here are some systemic solutions to address this issue:

1. Check Motor Load and Operating Environment

Overheating is often related to overload or environmental factors. First, confirm that the motor is within its rated load range and that the operating environment meets requirements.

Check for excessive load: Check for blockages or dust accumulation in ventilation ducts causing excessive air pressure. Regular cleaning of ducts is recommended.

Assess Ambient Temperature: Confirm whether the temperature around the motor is too high or ventilation is poor. Improve heat dissipation conditions if necessary.

2. Check the Cooling System

The blower motor's cooling system is crucial for preventing overheating. Check the heat sink for dust, corrosion, or damage.

Clean the Heat Sink: Regularly remove dust and oil from the heat sink to ensure unobstructed heat dissipation channels.

Replace the Heat Sink: If the heat sink is found to be severely corroded or damaged, it is recommended to replace it with a new one to restore cooling performance.

3. Check Motor Parameters

If the above checks do not reveal any problems, it may be necessary to check the motor's parameter settings and electrical components.

Check Power Supply Voltage: Confirm that the power supply voltage is stable. Excessive voltage fluctuations may cause the motor to overheat.

Check Overload Protection: Check if an overload protection device is installed. Adjust the protection parameters if necessary.

How to Deal with Electrical Faults in a Blower Motor?

Electrical faults in a blower motor (such as poor wiring or insulation aging) can lead to decreased motor performance and, in severe cases, safety hazards. To address this issue, the following measures are recommended:

1. Check Wiring and Connections

Electrical faults are usually caused by poor wiring or poor contact. First, check the connection between the motor and the power supply.

Check Cable Connections: Confirm that the cables are correctly connected and not loose.

Check Terminals: Check the terminals for rust, corrosion, or poor contact. Retighten or replace if necessary.

2. Check Insulation and Temperature

The insulation performance of a blower motor directly affects its safe operation.

Check insulation resistance: Use an insulation resistance meter to measure the insulation resistance between coils and between coils and ground to confirm the insulation condition.

Check temperature sensor: Confirm that the temperature sensor is working properly to ensure the reliability of the temperature monitoring system.

3. Check motor starting and running conditions

Electrical faults can also cause difficulty in starting the motor or unstable operation.

Check starting capacitor: Confirm that the capacitor is normal and replace it if necessary.

Check rotor resistance: Check whether the rotor resistance is abnormal to confirm whether there is an internal electrical fault in the motor.