An Interleaved Totem-Pole Bridgeless Boost PFC Converter with Soft-Switching Capability Adopting Phase-Shifting Control

2019 ◽  
Vol 34 (11) ◽  
pp. 10610-10618 ◽  
Author(s):  
Moo-Hyun Park ◽  
Jaeil Baek ◽  
Yeonho Jeong ◽  
Gun-Woo Moon
Keyword(s):  
Soft Switching ◽  
Phase Shifting ◽  
Boost Pfc Converter

scholarly journals Single Input Single Output Two Level Isolated Dc-Dc Converter With Secondary Side Phase Shifting For Solar Applications

2021 ◽  
Vol 9 (2) ◽  
pp. 433-442
Author(s):  
K.Girinath Babu, Et. al.
Keyword(s):  
High Frequency ◽  
Power Loss ◽  
Short Circuit ◽  
Soft Switching ◽  
Phase Shifting ◽  
Single Input Single Output ◽  
Leakage Inductance ◽  
Circulating Current ◽  
High Frequency Transformer ◽  
Secondary Side

 The isolated dc–dc converters with primary-side phase shifting (PPS) provides severely narrow soft-switching range for main devices in the primary side leg of full bridge converter. The leakage inductance of the high frequency transformer should be large enough for providing the energy needed for soft switching operations and also the idling power loss due to circulating current in the converter legs under large phase-shift angle, which makes reduction of conversion efficiency and complicated in designing the parameters of transformer. Furthermore, the turn-off diode commutations in the output-side rectifier are performed by hard-switching mode. To overcome all these drawbacks, a secondary side phase shifting (SPS) technique has been developed for two-level isolated DC-DC converter. This scheme provides wider soft switching range and reduced power loss due to elimination of circulating current in the primary side of high frequency transformer. In addition, SPS control also provide no reverse recovery current in diodes and hence no power losses in the secondary rectifier circuit. The control switches operate under soft switching even under rated load and short circuit conditions.  

A Photovoltaic Soft Switching Boost Circuit

2014 ◽  
Vol 599-601 ◽  
pp. 631-638 ◽  
Author(s):  
Yun Jun Yu ◽  
Sui Peng ◽  
Zi Heng Xu ◽  
Chao Tong ◽  
Yun Tao Xue
Keyword(s):  
Control Algorithm ◽  
Implementation Process ◽  
Soft Switching ◽  
Phase Shifting ◽  
Voltage Fluctuation ◽  
Zero Current ◽  
New Type ◽  
Current Zero ◽  
Zero Voltage ◽  
High Output

This paper study a new type of photovoltaic soft switching boost circuit according the present photovoltaic soft switching boost circuit auxiliary switch worked in hard switching situation and the gain of soft switching boost circuit is not good. The operation principle of the circuit and the detailed implementation process was analyzed. The parameters of the circuit were counted. The phase shifting control algorithm was used to control the circuit. The soft switching boost circuit has the following characteristics: (1) The main switch and auxiliary switch can realize zero current zero voltage turn-on and turn off, improve the conversion efficiency of DC side; (2) The boost effect is good and the gain is high; (3) High output power quality, voltage fluctuation is low; (4) The control is simple.

PWM Technique for Non-Isolated Three-phase Soft-Switching Buck-boost PFC Converter

2007 ◽  
Author(s):  
Toshimitsu Morizane ◽  
Wataru Shimomori ◽  
Katsunori Taniguchi ◽  
Noriyuki Kimura ◽  
Masanori Ogawa
Keyword(s):  
Soft Switching ◽  
Three Phase ◽  
Boost Pfc Converter

scholarly journals A Single-Stage LED Streetlight Driver with Soft-Switching and Interleaved PFC Features

Electronics ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 911 ◽  
Author(s):  
Cheng ◽  
Chang ◽  
Cheng ◽  
Chang ◽  
Chung ◽  
...  
Keyword(s):  
Power Factor ◽  
High Efficiency ◽  
Light Emitting Diode ◽  
Soft Switching ◽  
Single Stage ◽  
Resonant Converter ◽  
Coupled Inductors ◽  
Power Switches ◽  
Llc Resonant Converter ◽  
Boost Pfc Converter

This paper presents a single-stage driver with soft-switching and interleaved power-factor correction (PFC) features suitable for light-emitting diode (LED) energy-saving streetlight applications. The proposed LED streetlight driver integrates an interleaved buck-boost PFC converter with coupled inductors and a half-bridge LLC resonant converter into a single-stage power-conversion circuit with reduced voltage stress on the DC-linked capacitor and power switches, and it is suitable for operating at high utility-line voltages. Furthermore, coupled inductors in the interleaved buck-boost PFC converter are operated in discontinuous-conduction mode (DCM) for accomplishing PFC, and the half-bridge LLC resonant converter features zero-voltage switching (ZVS) to reduce switching losses of power switches, and zero-current switching (ZCS) to decrease conduction losses of power diodes. Operational modes and design considerations for the proposed LED streetlight driver are introduced. Finally, a 144 W (36V/4A)-rated LED prototype driver is successfully developed and implemented for supplying a streetlight module and operating with a utility-line input voltage of 220 V. High power factor, low output-voltage ripple factor, low output-current ripple factor, and high efficiency are achieved in the proposed LED streetlight driver.

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