APF is a new dynamic harmonic and reactive current compensation device,with the traditional passive LC power filter compared with a fast response,the compensation effect,dynamic compensation and other advantages.Active power filter for power quality improvement is a developing trend in the future,which Shunt Active Power Filter dominant position.In China for research and development of active power filter is still in experimental stage,so this article on the most basic of shunt active power filter hardware circuit for a more systematic theoretical and experimental research.This article describes the basic principles of APF and development in the world.
Text to PM15RSH120 inverter chip-centric analysis of the shunt voltage active power filter works,DC power supply,harmonic current detection circuit,PWM driver circuit and other issues,and the shunt active power filter the design.Summarizes the current several mainstream harmonic detection circuit,the final selection is based on LA50-P shunt APF current sensor as a current sensing element,a detailed analysis of its basic principle and designed the current signal conditioning circuitry.While the DSP output current can not drive APF,it was designed with 75,451 chips as the center of the drive circuit,while the design of isolated DC power supply completed APF hardware system design and commissioning.