IGBT temperature

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The IGBT Inverter Bridge overtemperature protection has activated, detecting excessively high short-term overload current. This can be caused by heavy motor loading or an incorrectly sized motor. Persistent high temperatures can permanently damage the IGBTs, leading to catastrophic drive failure.

• Sustained motor overload exceeding the drive's continuous current rating (e.g., motor current above 110% of rated for >60 seconds).
• Short-term, high-peak current demands during acceleration or braking, exceeding the IGBT module's transient thermal limits.
• Motor parameter settings (e.g., P3-01, P3-02) that do not accurately reflect the connected motor's characteristics.
• Inadequate cooling of the drive's heatsink due to blocked air filters or ambient temperature exceeding specification (e.g., >50°C).
• DC bus overvoltage condition causing higher switching losses in the IGBTs.

Klikk på steg for å spore fremgangen.

1. 1

   Record the drive's output current and motor load percentage displayed on the control panel.

2. 2

   Reduce the mechanical load on the motor and verify if the fault clears.

3. 3

   Verify parameter P3-01 (Motor rated current) and P3-02 (Motor rated power) match the motor nameplate.

4. 4

   Check for proper drive cooling fan operation and ensure heatsink fins are free of dust or obstructions.

5. 5

   Monitor the drive's internal temperature via parameter P7-10 (Drive temperature).

6. 6

   If the load is appropriate, consider increasing acceleration/deceleration ramps (e.g., P2-01, P2-02) to reduce peak currents.