Jan 03, 2019
With frequency converter running, the starting current is limited below 150% of rated current (125%~200%, depending on the type of machine) with the corresponding increase of frequency and voltage as the motor accelerates. When using power frequency power supply to start directly, the starting current is 6~7 times of rated current. Smooth starting (longer starting time) can be achieved by using frequency converter transmission. The starting current is 1.2~1.5 times of the rated current, and the starting torque is 70%~120% of the rated torque; For the frequency converter with automatic torque enhancement function, the starting torque is more than 100% and can be started with full load.