Implementation of a Wide Input Voltage Resonant Converter with Voltage Doubler Rectifier Topology

A new circuit structure of LLC converter is studied and implemented to achieve wide zero-voltage switching range and wide voltage operation such as consumer power units without power factor correction and long hold up time demand, battery chargers, photovoltaic converters and renewable power electronic converters. The dc converter with the different secondary winding turns is adopted and investigated to achieve the wide input voltage operation (50–400 V). To meet wide voltage operation, the full bridge and half bridge dc/dc converters with different secondary turns can be selected in the presented circuit to have three different voltage gains. According to input voltage range, the variable frequency scheme is employed to have the variable voltage gain to overcome the wide input voltage operation. Therefore, the wide soft switching load variation and wide voltage operation range are achieved in the presented resonant circuit. The prototype circuit is built and tested and the experiments are demonstrated to investigate the circuit performance.

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Hybrid DC-DC Converter with Low Switching Loss, Low Primary Current and Wide Voltage Operation

Energies ◽

10.3390/en14092536 ◽

2021 ◽

Vol 14 (9) ◽

pp. 2536

Author(s):

Bor-Ren Lin ◽

Yi-Kuan Lin

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Input Voltage ◽

Resonant Circuit ◽

Switching Loss ◽

Voltage Range ◽

Current Loss ◽

Zero Voltage Switching ◽

Energy Applications ◽

Multi Stage

A full-bridge converter with an additional resonant circuit and variable secondary turns is presented and achieved to have soft-switching operation on active devices, wide voltage input operation and low freewheeling current loss. The resonant tank is linked to the lagging-leg of the full bridge pulse-width modulation converter to realize zero-voltage switching (ZVS) characteristic on the power switches. Therefore, the wide ZVS operation can be accomplished in the presented circuit over the whole input voltage range and output load. To overcome the wide voltage variation on renewable energy applications such as DC wind power and solar power conversion, two winding sets are used on the output-side of the proposed converter to obtain the different voltage gains. Therefore, the wide voltage input from 90 to 450 V (Vin,max = 5Vin,min) is implemented in the presented circuit. To further improve the freewheeling current loss issue in the conventional phase-shift pulse-width modulation converter, an auxiliary DC voltage generated from the resonant circuit is adopted to reduce this freewheeling current loss. Compared to the multi-stage DC converters with wide input voltage range operation, the proposed circuit has a low freewheeling current loss, low switching loss and a simple control algorithm. The studied circuit is tested and the experimental results are demonstrated to testify the performance of the resented circuit.

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A New APWM Half-Bridge Converter with Enhanced Zero-Voltage-Switching Range in Wide Input Voltage Range

2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia) ◽

10.23919/icpe2019-ecceasia42246.2019.8796849 ◽

2019 ◽

Author(s):

Seung-Hyun Choi ◽

Jung-Kyu Han ◽

Min-Su Lee ◽

Sang-Hyun Ha ◽

Gun-Woo Moon

Keyword(s):

Input Voltage ◽

Voltage Range ◽

Zero Voltage Switching ◽

Zero Voltage ◽

Voltage Switching

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Design and Implementation of 2.5kW IBFB-LLC DC/ DC Converter Using SiC Mosfet

JST: Engineering and Technology for Sustainable Development ◽

10.51316/jst.149.etsd.2021.31.2.2 ◽

2021 ◽

Vol 31.2 (149) ◽

pp. 7-14

Keyword(s):

High Frequency ◽

Power Flow ◽

Input Voltage ◽

Voltage Range ◽

Zero Voltage Switching ◽

Design And Implementation ◽

Switching Losses ◽

Power Switches ◽

Isolation Transformer ◽

Zero Voltage

Interleaved Boost Full Bridge integrated LLC resonant (IBFB- LLC) is an isolated DC/DC converter with directional power flow, which can cope with a wide input voltage range of PV applications. The main losses of the converter are switching losses of the power switches and transformers losses. This paper proposes a method to improve the efficiency of the IBFB converter due to zero voltage switching technique, in combination with employing new SiC MOSFET technology instead of the conventional Si MOSFET. In addition, Litz wire is also adopted to reduce the losses on the high frequency isolation transformer. Both numerical simulations and experiments with a prototype 2.5kW converter are implemented to verify the feasibility and effectiveness of the proposed solution.

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Hybrid LLC Converter with Wide Range of Zero-Voltage Switching and Wide Input Voltage Operation

Applied Sciences ◽

10.3390/app10228250 ◽

2020 ◽

Vol 10 (22) ◽

pp. 8250

Author(s):

Bor-Ren Lin ◽

Kun-Yi Chen

Keyword(s):

Low Voltage ◽

Input Voltage ◽

Resonant Circuit ◽

Zero Voltage Switching ◽

Photovoltaic Energy Conversion ◽

Wide Range ◽

Input Side ◽

Input Region ◽

Output Side ◽

Zero Voltage

A new hybrid inductor-inductor-capacitor (LLC) converter is investigated to have wide voltage input operation capability and zero-voltage turn-on characteristics. The presented circuit topology can be applied for consumer power units without power factor correction or with long hold-up time requirement, photovoltaic energy conversion and renewable energy power transfer. To overcome the weakness of narrow voltage gain of resonant converter, the hybrid LLC converter with different turns ratio of transformer is presented and the experimental investigation is provided to achieve wide voltage input capability (400 V–50 V). On the input-side, the converter can operate as full bridge resonant circuit or half bridge resonant circuit with input split capacitors for high or low voltage input region. On the output-side, the less or more winding turns is selected to overcome wide voltage input operation. According to the circuit structures and transformer turns ratio, the single stage LLC converter with wide voltage input operation capability (400 V–50 V) is accomplished. The laboratory prototype has been developed and the experimental waveforms are measured and demonstrated to investigate the effectiveness of the presented hybrid LLC converter.

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Analysis of a PWM Converter with Less Current Ripple, Wide Voltage Operation and Zero-Voltage Switching

Processes ◽

10.3390/pr9040580 ◽

2021 ◽

Vol 9 (4) ◽

pp. 580

Author(s):

Bor-Ren Lin ◽

Yi-Hao Peng

Keyword(s):

Integrated Circuit ◽

Pulse Width Modulation ◽

Input Voltage ◽

Power Converter ◽

Switching Loss ◽

Voltage Range ◽

Zero Voltage Switching ◽

General Phase ◽

Zero Voltage ◽

Current Ripple

This paper studies and implements a power converter to have less current ripple output and wide voltage input operation. A three-leg converter with different primary turns is presented on its high-voltage side to extend the input voltage range. The current doubler rectification circuit is adopted on the output side to have low current ripple capability. From the switching states of the three-leg converter, the presented circuit has two equivalent sub-circuits under different input voltage ranges (Vin = 120–270 V or 270–600 V). The general phase-shift pulse-width modulation is employed to control the presented converter so that power devices can be turned on at zero voltage in order to reduce switching loss. Compared to two-stage circuit topologies with a wide voltage input operation, the presented converter has the benefits of simple circuit structure, easy control algorithm using a general integrated circuit or digital controller, and less components. The performance of the presented circuit is confirmed and validated by an 800 W laboratory prototype.

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