IGBT Overtemperature

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An overtemperature alarm is issued when the Insulated Gate Bipolar Transistor (IGBT) switch temperature within the drive exceeds 110 °C. This indicates excessive heat generation in the power stage, often due to heavy loading, an improperly sized motor, or inadequate cooling.

• Internal temperature of the Insulated Gate Bipolar Transistor (IGBT) module exceeds limits.
• High switching losses due to rapid switching frequencies or PWM patterns.
• Inadequate heatsink cooling for the IGBTs.
• Overcurrent conditions stressing the IGBTs.
• Degradation of thermal interface material between IGBT and heatsink.

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1. 1

   Check the motor loading to ensure it does not exceed the drive's continuous current rating.

2. 2

   Verify that the motor size and type are correctly matched to the frequency converter.

3. 3

   Perform an identification run (if applicable) to optimize motor control parameters and reduce unnecessary heat generation.