scholarly journals Resonant Converter with Voltage-Doubler Rectifier or Full-Bridge Rectifier for Wide-Output Voltage and High-Power Applications

Electronics ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 3 ◽  
Author(s):  
Bor-Ren Lin ◽  
Guan-Hong Lin ◽  
Aries Jian
Keyword(s):  
Output Voltage ◽  
Low Voltage ◽  
Resonant Circuit ◽  
Resonant Converter ◽  
Power Devices ◽  
Voltage Output ◽  
Power Switches ◽  
Bridge Rectifier ◽  
Voltage Doubler ◽  
Secondary Side

This paper presents a resonant converter with the benefits of wide output voltage, wide soft switching characteristics for power devices and high circuit efficiency. Since the series resonant circuit is adopted on the primary side, the power switches are turned on under zero voltage switching and power diodes on the secondary side can be turned off under zero current switching. To overcome the drawback of narrow voltage operation range in the conventional resonant converter, full-bridge rectifier and voltage-doubler rectifier topologies are employed on the secondary side for low-voltage output and high-voltage output applications. Therefore, the voltage rating of power devices on the secondary side is clamped at output voltage, rather than two times output voltage, in the center-tapped rectifier circuit. Synchronous power switches are used on the secondary side to further reduce the conduction losses so that the circuit efficiency can be further improved. To verify the theoretical analysis and circuit performance, a laboratory prototype with 1 kW rated power was built and tested.

scholarly journals Optimal Design of Multi-Output LLC Resonant Converter with Independently Regulated Synchronous Single-Switched Power-Regulator

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4341
Author(s):  
Sang Gab Park ◽  
Byoung Kuk Lee ◽  
Jong Soo Kim
Keyword(s):  
Electromagnetic Interference ◽  
Resonant Converter ◽  
Switching Losses ◽  
Zero Current Switching ◽  
Zero Current ◽  
Series Resonant ◽  
Power Switches ◽  
Voltage Doubler ◽  
Llc Resonant Converter ◽  
Secondary Side

This paper presents a tightly regulated multi-output isolated converter that employs only an independently regulated synchronous Single-Switched Post-Regulator (SSPR). The proposed converter is a highly accurate single-ended secondary side post-regulator based on a Series Resonant Converter (SRC); furthermore, it has a voltage-doubler characteristic. The proposed post-regulator requires only one auxiliary switch, in contrast with a bulky and expensive non-isolated DC–DC converter. Moreover, the added voltage-doubler can tightly regulate the slave output current. In addition, the voltage-doubler can improve electromagnetic interference characteristics and reduce switching losses arising from the Zero Current Switching (ZCS) operation of all power switches. The validity of the proposed converter is verified using experimental results obtained via a prototype converter applicable to an LED 3D TV power supply.

scholarly journals Novel High-Efficiency High Step-Up DC–DC Converter with Soft Switching and Low Component Voltage Stress for Photovoltaic System

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1112
Author(s):  
Yu-En Wu ◽  
Jyun-Wei Wang
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
High Efficiency ◽  
Low Voltage ◽  
Leakage Inductance ◽  
Power Switch ◽  
Half Wave Voltage ◽  
Half Wave ◽  
Voltage Stress ◽  
Voltage Doubler

This study developed a novel, high-efficiency, high step-up DC–DC converter for photovoltaic (PV) systems. The converter can step-up the low output voltage of PV modules to the voltage level of the inverter and is used to feed into the grid. The converter can achieve a high step-up voltage through its architecture consisting of a three-winding coupled inductor common iron core on the low-voltage side and a half-wave voltage doubler circuit on the high-voltage side. The leakage inductance energy generated by the coupling inductor during the conversion process can be recovered by the capacitor on the low-voltage side to reduce the voltage surge on the power switch, which gives the power switch of the circuit a soft-switching effect. In addition, the half-wave voltage doubler circuit on the high-voltage side can recover the leakage inductance energy of the tertiary side and increase the output voltage. The advantages of the circuit are low loss, high efficiency, high conversion ratio, and low component voltage stress. Finally, a 500-W high step-up converter was experimentally tested to verify the feasibility and practicability of the proposed architecture. The results revealed that the highest efficiency of the circuit is 98%.

scholarly journals A New Bridgeless High Step-up Voltage Gain PFC Converter with Reduced Conduction Losses and Low Voltage Stress

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2640 ◽  
Author(s):  
Xiang Lin ◽  
Faqiang Wang ◽  
Herbert H. C. Iu
Keyword(s):  
Output Voltage ◽  
Low Voltage ◽  
Voltage Gain ◽  
Simple Circuit ◽  
Voltage Stress ◽  
Circuit Structure ◽  
Power Switches ◽  
Simulation Results ◽  
Conduction Mode ◽  
Conventional Counterpart

Bridgeless power factor correction (PFC) converters have a reduced number of semiconductors in the current flowing path, contributing to low conduction losses. In this paper, a new bridgeless high step-up voltage gain PFC converter is proposed, analyzed and validated for high voltage applications. Compared to its conventional counterpart, the input rectifier bridge in the proposed bridgeless PFC converter is completely eliminated. As a result, its conduction losses are reduced. Also, the current flowing through the power switches in the proposed bridgeless PFC converter is only half of the current flowing through the rectifier diodes in its conventional counterpart, therefore, the conduction losses can be further improved. Moreover, in the proposed bridgeless PFC converter, not only the voltage stress of power switches is lower than the output voltage, but the voltage stress of the output diodes is lower than the conventional counterpart. In addition, this proposed bridgeless PFC converter features a simple circuit structure and high PFC performance. Finally, the proposed bridgeless PFC converter is analyzed and designed in the discontinuous conduction mode (DCM). The simulation results are presented to verify the effectiveness of the proposed bridgeless PFC converter.

scholarly journals Improving the Quality of the Underwater Robot’s Contactless Battery Charging System

2021 ◽  
Vol 2096 (1) ◽  
pp. 012107
Author(s):  
V A Gerasimov ◽  
A V Komlev ◽  
A Yu Filozhenko
Keyword(s):  
Power Transformer ◽  
Resonant Circuit ◽  
Transmitted Power ◽  
Battery Charging ◽  
Charging System ◽  
Power Switches ◽  
Scale Experiment ◽  
Switching Mode ◽  
Secondary Side

Abstract A special feature of the contactless battery charging system of an autonomous underwater robot is the use of a transformer with separating primary and secondary windings. As a result, a non-magnetic gap arises, which leads to the need to increase the primary current and the output current of the autonomous inverter. One of the ways to improve the quality of the system is the use of a resonant circuit at the inverter output in combination with the "soft switching" mode of its power switches. The use of resonance on the transformer secondary side also allows you to equalize the current loads of the primary and secondary windings. In this way, a minimum of losses in the inverter is achieved and the power transformer of the system is optimized. This allows you to reduce the size of the system while maintaining the transmitted power, or increase the transmitted power while maintaining the dimensions. The problem solved by using mathematical modelling with verification of the solution adequacy in a full-scale experiment.

scholarly journals Bidirectional Resonant Converter for DC Microgrid Applications

Processes ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 1664
Author(s):  
Bor-Ren Lin
Keyword(s):  
Electric Vehicle ◽  
Output Voltage ◽  
Resonant Circuit ◽  
Resonant Converter ◽  
Battery Charger ◽  
Dc Microgrid ◽  
Voltage Range ◽  
Zero Voltage Switching ◽  
Active Devices ◽  
Power Operation

A bidirectional resonant converter is presented and verified in this paper for an electric vehicle battery charger/discharger system. The presented circuit can achieve forward and backward power operation, low switching losses on active devices, and wide output voltage operation. The circuit structure of the presented converter includes two resonant circuits on the primary and secondary sides of an isolated transformer. The frequency modulation approach is adopted to control the studied circuit. Owing to the resonant circuit characteristic, active devices for both forward (battery charge) and backward (battery discharge) power operation can be turned on at zero voltage switching. In order to implement a universal battery charger for different kinds of electric vehicle applications, the DC converter is demanded to have a wide output voltage range capability. The topology morphing between a full bridge resonant circuit and half bridge resonant circuit is selected to obtain high- and low-output voltage range operations so that the 200–500 V output voltage range is realized in the presented resonant converter. Compared to the conventional bidirectional converters, the proposed can be operated under a wide voltage range operation. In the end, a 1 kW laboratory prototype circuit is built, and experiments are provided to demonstrate the validity and performance of the presented bidirectional resonant converter.

scholarly journals Resonant Converter with Soft Switching and Wide Voltage Operation

Energies ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3479 ◽  
Author(s):  
Bor-Ren Lin
Keyword(s):  
Output Voltage ◽  
Pulse Width Modulation ◽  
Low Voltage ◽  
Resonant Converters ◽  
Resonant Converter ◽  
Switching Loss ◽  
Voltage Range ◽  
Power Diodes ◽  
Switching Losses ◽  
In Series

A new DC/DC resonant converter with wide output voltage range operation is presented and studied to have the benefits of low switching losses on active devices and low voltage stresses on power diodes. To overcome serious reverse recovery losses of power diodes on a conventional full-bridge pulse-width modulation converter, the resonant converter is adopted to reduce the switching loss and increase the circuit efficiency. To extend the output voltage range in conventional half-bridge or full-bridge resonant converters, the secondary sides of two diode rectifiers are connected in series to have wide output voltage operation. The proposed converter can be either operated at one-resonant-converter mode for low voltage range or two-resonant-converter mode for high voltage range. Thus, the voltage rating of power diodes is decreased. Experiments with the design example are given to show the circuit performance and validate the theoretical discussion and analysis.

Research on Enhanced Magnetism and Demagnetization Armature Reaction of Double Salient Electro-Magnetic Motor

2012 ◽  
Vol 229-231 ◽  
pp. 899-902
Author(s):  
Lin Zhu ◽  
Xu Cheng Zhao ◽  
Heng Sheng Hu ◽  
Wei Xing Huang
Keyword(s):  
Direct Current ◽  
Low Voltage ◽  
Voltage Output ◽  
Armature Reaction ◽  
Bridge Rectifier ◽  
Electro Magnetic

This paper researches on half-bridge rectifier of double salient Electro-magnetic motor. It analysis principles of two rectifier models and studies the armature reaction. Through the experiment of the output of 28.5V on the motor, we find the proper rectifier model for low voltage output of direct current.

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