How to protect VFDs from overheating?

Posted on 23rd Nov 2023

Darwin Motion Drive

Variable Frequency Drives (VFDs) are electronic devices used to control the speed of an electric motor by adjusting the frequency and voltage supplied to the motor. Overheating is a common concern with VFDs, and it's important to take measures to protect them from excessive heat. Darwin Motion VFD & Servo Drive Manufacturer share some tips to help you protect a VFD from overheating:

Proper Ventilation:

Ensure that the VFD is installed in a well-ventilated area. Good airflow is essential for dissipating heat.

Leave enough space around the VFD to allow air to circulate freely.

Enclosure Cooling:

Consider using an enclosure with built-in cooling options, such as fans or air conditioning, to maintain a stable temperature inside the enclosure.

Ambient Temperature Considerations:

Be aware of the ambient temperature of the environment where the VFD is installed. High ambient temperatures can contribute to overheating.

If the VFD is located in a hot environment, consider additional cooling measures.

Dust and Contaminant Control:

Keep the VFD and its surroundings clean and free of dust and other contaminants. Dust can accumulate on heat sinks and reduce their effectiveness.

Correct Sizing:

Ensure that the VFD is properly sized for the motor it is controlling. An oversized VFD may not operate efficiently and can generate excess heat.

Parameter Settings:

Configure the VFD parameters according to the manufacturer's recommendations and the specific requirements of the motor and application.

Check and adjust the current limit settings to prevent the motor from drawing excessive current, which can lead to overheating.

Motor Compatibility:

Verify that the motor is compatible with VFD operation. Some motors may require additional features or modifications to work effectively with a VFD.

Temperature Sensors:

Install temperature sensors on critical components of the VFD, such as heat sinks and power semiconductors. These sensors can provide feedback to the drive, allowing it to adjust its operation based on temperature conditions.

Periodic Maintenance:

Establish a regular maintenance schedule to inspect and clean the VFD. Replace any damaged or worn-out components.

External Heat Sources:

Keep other heat-generating equipment away from the VFD to prevent additional heat buildup.

Always refer to the Darwin Motion manufacturer's guidelines and recommendations for the specific VFD model you are using. Following these guidelines will help ensure proper installation, operation, and maintenance, reducing the risk of overheating and prolonging the life of the VFD.

Darwin Motion offers Micro Drive- Matrix 900, DR Matrix 350 / Solar Drive, High Frequency Drive - DR Matrix 500, High Performance Drive - DR Matrix 680, Regenerative Drive - DR Matrix 880