scholarly journals Phase-Shift PWM Converter with Wide Voltage Operation Capability

Electronics ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 47 ◽  
Author(s):  
Bor-Ren Lin
Keyword(s):  
Phase Shift ◽  
Pulse Width Modulation ◽  
Design Procedure ◽  
Input Voltage ◽  
Pwm Converter ◽  
Voltage Range ◽  
Active Devices ◽  
Power Switches ◽  
Input Side ◽  
Zero Voltage

A soft switching three-level pulse-width modulation (PWM) converter is presented for industrial electronics with wide voltage range operation, such as solar power or fuel cell applications. Phase shift PWM scheme is used on the input-side to accomplish the zero voltage turn-on on power switches and improve the converter efficiency. Three-level diode-clamp circuit topology is adopted in the presented circuit to lessen the voltage ratings on active devices for high voltage applications. Three sub-circuits with the different turns-ratio of transformers can be selected in the presented converter in order to achieve 10:1 (Vin,max = 10Vin,min) wide input voltage operation when compared to the conventional multilevel converter. The proposed circuit is a single-stage converter instead of two-stage converter to realize wide voltage operation. Therefore, the presented converter has less component counts. Finally, the design procedure and experiments with a 300W laboratory circuit are presented and discussed to confirm the circuit analysis and converter performance.

scholarly journals Analysis and Implementation of a Phase-Shift Pulse-Width Modulation Converter with Auxiliary Winding Turns

Energies ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 222
Author(s):  
Bor-Ren Lin
Keyword(s):  
Phase Shift ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Input Voltage ◽  
Power Converter ◽  
Railway Vehicle ◽  
Voltage Range ◽  
Voltage Variation ◽  
Power Switches ◽  
Output Side

A phase-shift pulse-width modulation converter is studied and investigated for railway vehicle or solar cell power converter applications with wide voltage operation. For railway vehicle applications, input voltage range of dc converters is requested to have 30–40% voltage variation of the nominal input voltage. The nominal input voltages of dc converters on railway vehicles applications may be 37.5 V, 48 V, 72 V, 96 V and 110 V. Therefore, a new dc converter with wide input voltage operation from 25 to 150 V is presented to withstand different nominal input voltage levels such as 37.5–110 V on railway power units. To realize wide input voltage operation, an auxiliary switch and auxiliary transformer windings are used on output side of conventional full-bridge converter to have different voltage gains under different input voltage values. Phase-shift pulse-width modulation is adopted in the developed dc converter to accomplish soft switching operation on power switches. To confirm and validate the practicability of the presented converter, experiments based on a 300 W prototype were provided in this paper.

scholarly journals DC Converter with Wide Soft Switching Operation, Wide Input Voltage and Low Current Ripple

2020 ◽  
Vol 10 (13) ◽  
pp. 4672 ◽  
Author(s):  
Bor-Ren Lin ◽  
Guan-Hong Lin
Keyword(s):  
Pulse Width Modulation ◽  
Current Source ◽  
Input Voltage ◽  
Soft Switching ◽  
Resonant Converter ◽  
Pwm Converter ◽  
Input Side ◽  
Output Side ◽  
Zero Voltage ◽  
Current Ripple

A soft switching current-source resonant converter is presented and implemented for wide voltage applications such as fuel cells and solar power. An LLC (inductor–inductor–capacitor) converter is adopted to accomplish zero voltage (current) operation on active switches (diodes). Thus, the circuit efficiency is increased. The interleaved pulse-width modulation (PWM) converter is employed on the input side to accomplish low input ripple current. A hybrid LLC converter is adopted to achieve wide voltage operation from Vin, min to 4Vin, min and to improve the weakness of a conventional LLC converter. Half-bridge diode rectification is employed on the output side to decrease power loss on the rectifier diode. To confirm the theoretical analysis and feasibility, experimental verifications with a 500-W prototype are demonstrated in this paper.

scholarly journals Analysis and Verification of a Wide Input Voltage PWM Converter with Variable Windings

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1634
Author(s):  
Bor-Ren Lin ◽  
Ji-Wei Chang
Keyword(s):  
Pulse Width Modulation ◽  
Input Voltage ◽  
Zero Voltage Switching ◽  
Multi Stage ◽  
Power Switches ◽  
Input Side ◽  
Circuit Components ◽  
Switching Characteristics ◽  
Zero Voltage ◽  
Voltage Switching

A three-leg pulse-width modulation converter with auxiliary windings is provided and investigated to realize wide voltage operation and zero voltage switching characteristics on power switches. The presented converter has three converter legs on the input-side and two sets of winding turns on the output-side. Owing to the on/off states of the three converter legs and the two sets of secondary winding turns, the proposed converter can be operated under three different equivalent circuits to have wide input voltage operation from 30V ~ 240V (Vin,max = 8Vin,min). Compared with the multi-stage converters to realize wide input voltage operation, the proposed circuit topology has fewer circuit components and a simple control algorithm. Conventional duty cycle control with phase-shift between each converter leg is adopted to regulate load voltage and also accomplish zero voltage switching on active switches. The presented three-leg converter is tested with a laboratory circuit. Finally, experiments testify to the performance and validity of the presented converter.

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

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.

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

Processes ◽  
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.

scholarly journals ZVS Full–Bridge Based DC–DC Converter with Linear Voltage Gain According to Duty Cycle

2013 ◽  
Vol 64 (5) ◽  
pp. 331-333
Author(s):  
Hyun-Lark Do
Keyword(s):  
Duty Cycle ◽  
Pulse Width Modulation ◽  
High Efficiency ◽  
Input Voltage ◽  
Voltage Gain ◽  
Voltage Range ◽  
Zero Voltage Switching ◽  
Switching Losses ◽  
Power Switches ◽  
Linear Voltage

Abstract This paper presents a zero-voltage-switching (ZVS) full-bridge based DC-DC converter with linear voltage gain according to duty cycle. The proposed converter is based on an asymmetrical pulse-width-modulation (APWM) full-bridge converter which has various advantages over other converters. However, it has some drawbacks such as limited maximum duty cycle to 0.5 and narrow input range. The proposed converter overcomes these problems. The duty cycle is not limited and input voltage range is wide. Also, the ZVS operation of all power switches is achieved. Therefore, switching losses are significantly reduced and high-efficiency is obtained. Steady-state analysis and experimental results for the proposed converter are presented to validate the feasibility and the performance of the proposed converter.

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

Energies ◽  
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.

scholarly journals PV Power-Generation System with a Phase-Shift PWM Technique for High Step-Up Voltage Applications

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Cheng-Tao Tsai ◽  
Sin-Hua Chen
Keyword(s):  
Power Generation ◽  
Phase Shift ◽  
Pulse Width Modulation ◽  
Maximum Power ◽  
Generation System ◽  
Output Stage ◽  
Point Tracking ◽  
Power Switches ◽  
Power Generation System ◽  
Pv Power Generation

A PV power-generation system with a phase-shift pulse-width modulation (PWM) technique for high step-up voltage applications is proposed. The proposed power-generation system consists of two stages. In the input stage, all power switches of the full-bridge converter with phase-shift technique can be operated with zero-current switching (ZCS) at turn-on or turn-off transition. Hence, the switching losses of the power switches can be reduced. Then, in the DC output stage, a voltage-doubler circuit is used to boost a high dc-link bus voltage. To supply a utility power, a dc/ac inverter is connected to induce a sinusoidal source. In order to draw a maximum power from PV arrays source, a microcontroller is incorporated with the perturbation and observation method to implement maximum power point tracking (MPPT) algorithm and power regulating scheme. In this study, a full load power of 300 W prototype has been built. Experimental results are presented to verify the performance and feasibility of the proposed PV power-generation system.

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