IGBT Overheating

What does tJF mean?

IGBT overheating detected. This means the temperature of the Insulated Gate Bipolar Transistors in the drive's power stage has exceeded safe limits. This is often caused by heavy loads, high ambient temperatures, or cooling system failure. Prolonged overheating can lead to permanent damage to the IGBTs.

• Excessive ambient temperature around the drive enclosure, hindering heat dissipation.
• Continuous operation at high motor load exceeding the drive's continuous current rating (e.g., above Parameter P0-05).
• Clogged or non-functional cooling fans on the drive's heatsink, reducing airflow.
• Heatsink fins on the drive are blocked by dust, debris, or poor cabinet ventilation.

Click steps to track your progress.

1. 1

   1. Verify the ambient temperature inside the drive enclosure is within the manufacturer's specified range (e.g., 0-50°C).

2. 2

   2. Inspect the drive's cooling fans for proper operation and clear any dust or debris accumulation on the heatsink fins.

3. 3

   3. Monitor the drive's internal temperature (e.g., display parameter d0-04) and compare it to the alarm limits.

4. 4

   4. Reduce the motor load or operating cycle duty (e.g., acceleration time P1-01) to decrease average output current.

5. 5

   5. Check for proper air circulation in the control cabinet (e.g., intake/exhaust fans, filters) as per installation guidelines.