Function
The flying start feature kicks in to catch a motor that is spinning freely due to a mains drop-out or windmilling. This function is especially relevant for centrifuges and fans. Flying start allows the driver to synchronize with an operating motor rotating at up to full speed in either direction.
This prevents trips due to overcurrent draw. It also minimizes mechanical stress on the system since there is no abrupt change in motor speed when the drive re-starts.
Features
Use the new improved flying start for induction motors running at speeds up to 132 Hz, with VLT® AutomationDrive FC 302, VLT® AQUA Drive FC 202, VLT® Refrigeration Drive FC 103, or VLT® HVAC Drive FC 102 running in VVC+ mode. The new flying start is also active in VLT® AutomationDrive FC 302 when running in flux mode.
For induction motors running at speeds above 132 Hz, the flying start function will operate as before.
Benefits of the improved flying start include:
- Reliable catch of the motor
- Up to 4 times faster recovery
- Minimal mechanical stress on the system