Three phase half wave rectifier is one technique three phase AC voltage conversion into DC voltage. In the rectifier process conducted by the diode will arise wave distortion on the input, resulting in phase shifts that resulted in low power factor. By using a boost converter as a single rectifier, power factor better. On this last project used a method of boost power factor correction (PFC) using the conducted continuous mode (CCM). The purpose of this Final Project is to convert three phase AC voltage of 380 volts, then the voltage lowered by three pieces of single phase transformers are connected in the stars (Y-Y), then the output voltage is rectified by a series of Half-Wave Rectifier DC voltage. After that, the voltage strengthened by the Boost Converter circuit which switching conducted by the MOSFET using Fuzzy PI control. Results obtained from the test circuit total harmonic distortion value (THDi) of 38.66% and 0.85 PF rectifier circuits, and the rectifier with boost converter THDi = 38.29% and PF = 0.88 and the circuit integration with Fuzzy PI control is obtained THDi = 37.89% and PF = 0.9. The test result shows that the PFC boost system using the fuzzy PI control can improve the distortion waves on the input side
