DC Bus Overvoltage
Yaskawa · V1000 AC Drive
What does DC Overvoltage mean?
The DC bus voltage inside the drive has risen beyond its acceptable operating limit. Common causes include excessively short deceleration times, disabled stall prevention, a malfunctioning braking chopper or resistor, unstable motor control, or an excessively high input voltage. This condition poses a risk of damage to the drive's internal DC link capacitors and power components.
Additional Steps
Steps 1–2 are listed in Priority Fix.
- 3
Check the functionality of the external braking resistor and its associated chopper circuit; replace if faulty.
- 4
Verify the input power supply voltage to ensure it remains consistently within the drive's specified limits.
- 5
Review and adjust motor parameters, including torque and slip compensation, AFR, and hunting prevention settings for stable control.