Normally, it will generate 6 to 7 times start current when the commercial power is applied directly and causes electric inrush. The motor can be started smoothly when driving by the AC motor drive and the frequency and voltage will be increased with acceleration. The start current should be below 150% (125%~200% for the different models), and the start torque is from 70% to 120% rated torque. For the drive with auto-enhanced torque and the start torque is over 100%, it can be started with full load.