Drive
IGBT Module
Switches DC bus power at high frequency to produce the current waveform each servo motor phase requires.
IGBT modules are the switching devices at the heart of the servo amplifier, turning DC bus power on and off at high frequency to synthesize the current waveform commanded by the axis control loop for each motor phase.
These modules run hot by design and are mounted to a heatsink with thermal paste or a pad, so amplifier cooling airflow directly affects their service life.
A shorted IGBT is one of the more dramatic amplifier failures, often tripping an overcurrent fault immediately and sometimes producing a visible burn mark on the module or heatsink.
Related components
Common questions
- What does the IGBT Module do?
- Switches DC bus power at high frequency to produce the current waveform each servo motor phase requires.
- How does the IGBT Module fail?
- Common failure modes: Shorted device causing an immediate overcurrent trip, Thermal degradation from repeated overheating, Cracked solder joints from thermal cycling over time, Gate driver failure preventing proper switching.
- What fault codes relate to the IGBT Module?
- Related codes include SRVO-021, SRVO-023, SRVO-070.