Design of Boost-Type Power Factor Correction With Stepped Air-Gap Ferrite Inductor for Peak-Power-Load Condition

Abstract

This paper presents the designed method and the implementation of stepped air-gap ferrite inductor applied in power factor correction (PFC). Conventionally, the input inductor of the PFC has a designed consideration on the maximum output power; thus, designing the PFC for peak-power-load conditions results in a very large inductor. The proposed designed method improves the load-carrying capability without increasing the volume of the inductor when the PFC is operating in peak-power-load conditions. The stepped air-gap ferrite inductor maintains the inductance in the rated-full-load and sustains the peak-power-load conditions with the lower inductance. Compared with the convectional ferrite inductor, the proposed method can maintain the size and the efficiency of the power supply, and promote the powercarrying ability. The detailed analysis and the design of the proposed method are described. Experimental results are recorded and evaluated by a prototype PFC with an AC input voltage of 110-264 VAC and a DC output voltage of 384 VDC. Finally, the volume of input inductor is kept with 40950 mm 2 , the efficiency is also same compared with the conventional inductor, and the load-carrying capability of the converter is promoted from the normal rated power of 1 kW to the peak power load of 2 kW.

A Modified PI-Controller Based High Current Density DC–DC Converter for EV Charging Applications

“…To perform the AC-DC operation the conventional diode rectifier might be used which leads to more power loss consequently the power factor as well as THD degrades. To maintain the PFC tropology might be used which is complicated and costly [7][8][9][10][11][12][13][14][15][16][17][18]. To get rid of it a low-frequency coupled inductor-based AC-DC converter has been used which is associated with a LCL filter and two diodes [19][20][21][22].…”