Configure The Frequency Converter With Power Frequency/variable Frequency Dual-mode Switching Function

The system needs to be able to identify the current operating mode of frequency converter 60hz to 50hz single phase, that is, to determine whether frequency converter 50hz to 60hz single phase is in variable frequency mode or power frequency mode, and when to trigger the switching logic. During the switching process between variable frequency and power frequency, if the detection of the motor's remaining induced electromotive force, phase sequence, and phase difference is lacking, a huge inrush current may be generated.