Resonant Bridge Converter Research Articles

Electrolytic Capacitor-Less Dual-Half Active Bridge Resonant Converter With PSO-Based MPP Tracking

Electrolytic Capacitor-Less Dual-Half Active Bridge Resonant Converter With PSO-Based MPP Tracking

Optimized Power Factor Correction for High Speed Switched Reluctance Motor

The Power Factor Correction (PFC) in Switched Reluctance (SR) motor is discussed in this article. The SR motors are applicable for multiple applications like electric vehicles, wind mills, machineries etc. The doubly salient structure of SR motor causes the occurrence of torque ripples, which affects the power factor of the motor. To improve the power quality, the power factor has to be corrected and the ripples have to be minimized. In order to achieve these objectives, a novel power factor correction (PFC) method is proposed in this work. Here, the conventional Diode Bridge Rectifier (DBR) is replaced by a Bridgeless Hybrid Resonant (HR) converter, which assists in improvising the output in a wider range. The converter is chosen because of having variety of beneficial measures including high gain. The converter’s output is fed to the SR motor by means of an asymmetric Bridge Resonant (BR) converter. The proposed converter operates in continuous mode of conduction with the switching frequency of 10 KHz. A hysteresis current controller and Proportional Integral (PI) controller are utilized for reducing the harmonics in the source current along with the regulation of output voltage. In addition, the speed control of SR motor is accomplished by means of the Whale Optimization Algorithm (WOA) assisted PI controller. The proposed methodology is effective for the control of unity power factor, torque and current ripples. The Total Harmonic Distortion (THD) of the source current is also minimized, which suits the standard of International Electrotechnical Comission IEC 61000-3-2. By this methodology, the power factor of 0.99 is achieved with 97% efficiency and 3.92% THD. The proposed methodology is validated in simulation by MATLAB and in hardware by FPGA Spartan 6E.

Мостовой резонансный источник питания электродугового двигателя малого космического аппарата

In this paper, the applied problems of designing a bridge resonant converter with a high-voltage arc ignition system in the channel of an electric arc motor is solved. The development of a bridge resonant power supply is presented, a review and analysis of power sources of arcjet thruster of various capacities is carried out. The theoretical aspects of calculating the main parameters of the source are considered. The transfer function describing the gain of the resonant circuit of the power supply is given. With the help of the transfer function, gain diagrams are constructed for various values of the Q-factor of the contour. A prototype of a power supply, a starting system and an arcjet thruster is presented. A series of experiments aimed at identifying the operability of the source is carried out. According to the experimental results, the maximum output power of the source wiz 182,4 watts, and the maximum efficiency is 87,5 %. Frequency spectra of the output current of the power supply are obtained. The current-voltage characteristics for the Ar and N2 are constructed. In the course of the study, phenomena related to the chaotic dynamics of the arc in the engine channel are discovered. Chaotic fluctuations are observed at the moment of starting the engine and disappeared after steady-state operation.

Analysis and Verification of a Half-Dual Bridge Resonant Converter with Voltage Match Modulation

To overcome the weakness of the narrow conversion gain of dual bridge resonant converter, a half-dual bridge resonant converter (H-DBRC) with voltage match modulation (VMM) is proposed and implemented for wide voltage range applications. The H-DBRC, including a full bridge on the primary side and a half bridge on the secondary side, is adopted to realize the bidirectional power flow and wide voltage operation. Owing to the synergy between the H-DBRC structure and VMM strategy, the converter can operate in full-bridge state and half-bridge state with maximized ZVS (zero-voltage switching) operation and minimized circulating current. The steady-state analysis is performed and the solutions for both forward and backward modes could be obtained uniformly by using the fundamental harmonics approximation approach. The soft-switching characteristics, implementation process and design example are analyzed in detail. Finally, to confirm the theoretical analysis and feasibility, both simulation and experimental verifications are demonstrated in this paper. Since the converter consistently achieves voltage-matching operation, the optimal ZVS range can be obtained when the voltage gain M is between 0.5 to 1. Moreover, the economic cost and control complexity are greatly reduced because only six switches are required in the converter.

Parasitic Parameter Extraction and Identification Method for HFT Based on DC-DC Converter in EV Application

Dual active bridge (DAB) resonant converter is one of the most commonly used soft switched converters of the new electric vehicle (EV) energy system. One of the most essential parts of the DAB resonant converter, the high-frequency transformer (HFT) includes certain parasitic parameters that caused voltage and current oscillation, or ring to the DAB converter. These precise parasitic parameters of the HFT provide accurate information and are useful to the DAB converter control system design. However, they are not provided by the manufacturer. This study focuses on this prospect of information, proposing a novel parasitic parameter identification method for the HFT based on DAB converter. Moreover, a 40 kHz full-bridge resonant DAB converter prototype based on SiC MOSFETs and HFPT laboratory prototype is constructed to verify the effectiveness and feasibility of the proposed method. Simulation and experimental results verify that the proposed method is more cost-effective than the conventional way to measure via impedance (IMDP) analyzer, requires shorter simulation time than the traditional finite element analysis (FEA) method, while it is also more accurate has fast convergence than the traditional forgetting factor recursive least square (FFRLS) identification algorithm.

Control Strategy of the Electric Drive for a Switched Reluctance Motor with Improved Performance

The switched-reluctance motor due to its advantages can be used in vehicles of low and medium power, as a replacement for permanent magnet motors. However, at the moment, due to significant torque ripple, insufficient power density and driver complexity, it is not widespread. The article describes the structure of the switched-reluctance motor with a special C-shaped tooth structure of the poles of the stator and rotor located in a non-magnetic body, which has improved characteristics in comparison to the traditional structure, where the rotor and stator are completely made of soft magnetic materials. A special technique for the formation of the magnetic flux, by which a constant torque is achieved, is proposed for this switched-reluctance motor structure. The form of the stator winding current is given to ensure a given magnetic flux. Due to the high-frequency current generation, the dimensions of the motor are minimized. As a result, the basic requirements for the electric drive converter were formed. An analysis was made of popular solutions that can provide a given current shape with a steep edge and having high efficiency. As a result, the optimal structure and the algorithm for generating the current of the converter were determined. Since the engine operates at an increased frequency, a resonant converter was selected, which provides soft key switching, ensuring high efficiency. Also, to increase the torque and engine efficiency, a two-section pole structure with the same number of sections on the rotor and stator using additional windings is proposed. The proposed structure and algorithm of the motor operation implies the operation of only one pole of the stator at a time, and as a result, only one electric drive can be used for the entire motor, which will switch between the poles using two-way keys. As a result, the proposed driver consists of only four resonant converters. The results of the switched-reluctance motor electric drive control system were tested in the Matlab Simulink® environment and, as expected in theory, the total force has no ripples. As a result, the developed electric drive has a simple structure with a minimized number of converter modules and requires only four modules, regardless of the number of stator poles. Due to the high-frequency method of forming the stator magnetic flux, the dimensions of the motor are minimized. As a result of using a resonant bridge converter, the dynamic losses are minimal.

The Steady-State DC Gain Loss Model, Efficiency Model, and the Design Guidelines for High-Power, High-Gain, Low-Input Voltage DC–DC Converter

The phase modulated full bridge resonant transition converter (PMRTC) is commonly used for high-gain, high-power applications, as PMRTC converters retain the qualitative nature of hard switched pulse-width modulation counterparts with additional damping ( $R_d$ ), where $R_d$ is load, transformer turns ratio and frequency dependent. The PMRTC converter enables operation at a higher switching frequency due to the soft-switching nature, thereby achieving better power density. For battery fed high-power, high-gain applications, PMRTC exhibits a significant drop in the dc gain due to $R_d$ and other nonidealities, limiting the maximum frequency of operation. Thus, computing this drop and analyzing the effects of switching frequency becomes necessary in achieving the required steady-state dc gain. From the analysis, it is observed that, for a choice of switching frequency above $f_{s\;{\rm critical}}$ , the required steady-state dc gain is not achieved for any turns ratio. Hence, to increase the switching frequency of operation of a PMRTC converter, a two-transformer configuration is adapted and with this configuration, the dc gain loss model, power loss, and efficiency model and small-signal model are established. The design guidelines on the choice of switching frequency and transformer turns ratio based on the proposed models is described. The proposed models with the presented design guidelines are validated in simulations and hardware prototype for a 1 kW PMRTC converter.

Smart Internet of Things (IOT) System for Performance Improvement of Dual Bridge LLC Resonant Converter by Using Sophisticated Distribution Control Method (SDC)

A resonant converter is a kind of electric power converter that contains a system of inductors and capacitors called a resonant tank, tuned to resonate at a particular frequency in this work recommends a better-quality dual bridge LLC resonant converter with a novel controller technique. The resonant converters include the serial or parallel connections of inductors and capacitors to activate the switch to realize the Zero Current Switching (ZCS) and Zero Volt Switching (ZVS) under resonance conditions. The resonant effects are switching sufferers, turning strain and electromagnetic interference problems the switching resonant converter controls the output voltage through changing frequency and generally can be sub classified in ZCS converter and ZVS converter. This scheme had combined wireless monitoring for dual bridge LLC resonant converter for dc distribution applications based on sophisticated distribution controller (SDC) through the internet of things and embedded structure access and other mechanisms. The consequence of our exhibition demonstrates that the framework can monitor and store the manipulate data from the converter. Thus, the wireless monitoring functions are realized in real-time. This converter permits both forward and reverses power exchange between the source and the load, to keep up the output voltage consistent, regardless of load and line unsettling influences, it is important to work the converter as a closed loop system. The proposed SDC based dual bridge resonant converter has validated through simulation in Matlab Simulink environment. A hardware setup is also developed to validate the simulation. General 97% effectiveness accomplished at full load condition in light of the dual bridge resonant converter.

CALCULATION OF OPERATING PARAMETERS OF HIGH-VOLTAGE POWER TAKE-OFF SYSTEM FOR THE PHOTOVOLTAIC FACILITY

Purpose. To ensure maximum production of electric power by photovoltaic vacilities, in addition to using highly efficient photovoltaic modules equipped with solar radiation concentrators must use a highly effective power take-off system. This paper is inscribed to solving the problem of a highly efficient and economic power take-off system development. Methodology. To solving the problem, we implemented three stages. On the first stage examines the dependence of electrical power from the intensity of the incident solar radiation. Based on this, the second stage is calculated the DC-DC converter resonant circuit and its working parameters, and developed circuit diagram of DC-DC converter. On the third stage, we carry out an analysis of power take-off system with step up DC-DC converter working. Results. In this paper, we carry out the analysis of working efficiency for photovoltaic facility power take-off system with step-up boost converter. The result of such analysis show that the efficiency of such system in a wide range of photovoltaic energy module illumination power is at 0.92, whereas the efficiency of classic power take-off systems does not exceed 0.70. Achieved results allow designing a circuit scheme of a controlled bridge resonant step-up converter with digital control. Proposed scheme will ensure reliable operation, fast and accurate location point of maximum power and conversion efficiency up to 0.96. Originality. Novelty of proposed power take-off system solution constitute in implementation of circuit with DC-DC converters, which as it shown by results of carrying out modeling is the most effective. Practical value. Practical implementation of proposed power take-off system design will allow reducing losses in connective wires and increasing the efficiency of such a system up to 92.5% in wide range of photovoltaic energy modules illumination.

Power Factor Corrected Single Stage AC-DC Full Bridge Resonant Converter

Power Factor Corrected Single Stage AC-DC Full Bridge Resonant Converter

The FHA Analysis of Dual-Bridge LLC Type Resonant Converter

The dual bridge resonant converter is designed in this paper. In this converter the LLC type resonance configuration is proposed .This types is compared with the other configurations and its benefits are narrated in this paper. The steady-state analysis of the LLC configuration is done using fundamental harmonics approximation method and the values for the components of resonance configuration is found and used for simulation. The simulation results shows that the converter is able to achieve the zero voltage switching for the wide load range and attains a good efficiency. DOI: http://dx.doi.org/10.11591/ijpeds.v4i4.6513

Modeling and Simulation of Resonant Converter for Street Light Application

This paper deals with the resonant converter for street LED light application. The proposed converter has high power density and efficiency. Different types of resonant converter have been discussed along with operation of LLC half bridge converter. LLC half bridge resonant converter is designed by calculating relevant parameters and mathematical model has been formed to simulate the study of the results.

태양광 발전에 의한 비접촉 방식 저 전력 에너지 전송회로에 관한 연구

본 논문은 무선 전력 전송에 관한 이론을 토대로 송신부와 수신부의 두 개의 평면 코일 사이의 자기 유도 원리의 다양한 조건 변화에 따른 무 접촉 무선 전력 전송에 관한 연구이다. 실험은 무 접촉 방식으로 전력을 전송 할 수 있는 송신부인 1차 측 코일과 수신부인 2차 측 코일 및 하프브리지 직렬 공진 컨버터를 적용한 무선 전원 장치의 송신부 회로와 수신부회로의 출력 전압 및 전원을 계산할 수 있는 환경을 마련해 주었다. 송신부의 유도 결합 공진 컨버터의 주 전원은 태양광 전지 모듈과 대체 광원으로서 인공 광원(할로겐 램프)을 이용하여 전기 에너지로 변환 시켜 사용하였으며 태양광 발전으로부터 공급받은 24 V 전원을 무선 전력 전송 장치를 위한 입력 전원으로 사용하였다. 실험 결과, 전달 받은 전력은 수신부 회로에서 조명을 밝히거나 배터리를 충전하는데 사용된다. 그리고 송신부의 출력 측에서 측정을 통해 수신부의 입력 전력과 비교하여 무선 전력 전송 효율은 약 70~89%로 나타났다. 또한 이 논문을 위해서, 무선 전력 전송 시 이물질이 간섭하였을 때, ID 검증 방식과 전압의 위상차 비교 방법을 통해 효율성 실험을 하였다. In this paper, it is about to non-contact wireless power transmission according to various conditions of self induction principle between the two planar coils at a transmission unit and a receiving unit based on the theory of wireless power transmission. The experiments are occurred in order to power transfer of noncontact method from designed wireless circuits in the primely coil and secondary coil, and the applying to Half Bridge Resonant converter transmission unit and receiving unit. and that were able to prepared circumstance to calculate of the output voltage and power source. The main power of the inductive coupling the resonant converter at the transmission unit is converted electrical energy using the solar cell module and artificial light source (halogen lamp) as a replace light and received 24 V power supply from solar power was used a input power source for the wireless power transmission device. Experimental results, to received of power is used to illuminate the lighting and to charge the battery in receiving circuit.And the wireless power transmission efficiency measured at the output side of the transmission unit is obtained about 70% to 89% compared to input power of receiving unit.In addition, efficiency were tested through ID verification method and comparing the phase difference between the voltage when foreign substances interfere with wireless power transmission.

LLC 하프 브리지 공진형 컨버터 효율 특성

The resonant converter cause the high voltage stress according to the input voltage, which increases the conduction loss in converter power switches. The topology of LLC half bridge resonant converter provides ZVS characteristic and also the stress of voltage and current is smaller than that of the general resonant converters. So we can expect the higher efficiency. In this paper, the analysis of the characteristics of the converter efficiency and the best conditions for highest efficiency were investigated. As a result, the efficiency of utilizing up to 93% is achieved.

Plasma torch ignition by a half bridge resonant converter

The design, implementation, and performance of a half bridge resonant converter (HBRC) used as an electronic ignition system for arc plasma torch generation is presented. The significance of the design lies in its simplicity, versatility, and low cost. The system operates as a high voltage supply attached to electrodes before gaseous breakdown and as an open circuit when an electric arc is established. The operation of the HBRC does not interfere with either the electric supply line or the electric measurement devices. Advantages and limitations of the converter are reviewed. The experimental impedance variation in the medium as a function of frequency and some experiences in striking arcs are also presented.