◉ APF full name low-voltage active power filter device, it is to detect the load current in real time. Based on the specified sub harmonic current detection algorithm, we generate the control signal to drive the IGBT output with the same phase as the load harmonic current amplitude, so as to achieve the purpose of harmonic offset.                                                

◉ Capwin APF including wall-mounted, rack type and whole cabinet type, is composed of HMI and APF. HMI means the human-computer interaction system, it is used for the configuration and query of the whole cabinet information.