VFC 1 / 2 & flying start

The flying start function lets you synchronize the inverter to a motor that is already in operation. This function is used in particular with drives that are not braked actively, run on for a long time or are turned by a flowing medium, e.g. pumps and fans. The maximum flying start time is approx. 200 ms.

If the inverter fails to detect a "flying start point", it assumes that the motor is at a standstill and commences the integrator start from n = 0. Consequently, the motor decelerates to n = 0 followed by a run up to n_setp. This behavior can arise in particular with very low resistance motors in the speed range below n = 300 rpm (4-pole motor).

WARNING

Risk of crushing if the drive starts up unintentionally.

Severe or fatal injuries.

• Do not use the flying start function in hoist applications!
• Ensure that the motor cannot start unintentionally.

INFORMATION

• The flying restart function does not function if there is an output filter connected to the inverter.
• Due to exact motor data, the proper function of the flying start function has only been tested with SEW motors. SEW-EURODRIVE does not guarantee a proper function of the flying start function for non-SEW motors.