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2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)最新文献

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Non-Isolated Three Port DC-DC Converter with Soft Switching Technique* 采用软开关技术的非隔离三端口DC-DC变换器*
Neda Zahedi, Sama Salehi, S. Hosseini
In this Paper, a three-port DC-DC boost converter with soft switching is proposed. The suggested converter provides a unidirectional power port for input power supply and a bidirectional power port for energy storage element in a single structure. Supplying output load and charging/discharging of the battery can be done through the input source. Both switches used in this converter are turned on in zero voltage switching (ZVS) mode; thus, the loss of switching is reduced significantly. For soft switching, a lossless active snubber is used. A simple controller is used for power management, which will provide continuous power injection to the load. In this converter, based on the power demand in the load, three different operational modes are introduced, which every three of them are studied in this paper and the relating simulation results are presented.
本文提出了一种带软开关的三端口DC-DC升压变换器。本发明的转换器在单一结构中提供用于输入电源的单向电源端口和用于储能元件的双向电源端口。通过输入电源提供输出负载和电池的充电/放电。该转换器中使用的两个开关都以零电压开关(ZVS)模式打开;因此,开关损耗显著降低。对于软开关,使用无损有源缓冲器。一个简单的控制器用于电源管理,它将为负载提供持续的功率注入。在该变换器中,根据负载的功率需求,引入了三种不同的工作模式,本文分别对这三种工作模式进行了研究,并给出了相应的仿真结果。
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引用次数: 5
Reliability Analysis of Buck-Boost Converter Considering the Effects of Operational Factors 考虑工作因素影响的Buck-Boost变换器可靠性分析
Hadi Tarzamni, F. Tahami, M. Fotuhi‐Firuzabad, Farhad Panahandeh Esmaeelnia
In this paper, reliability of conventional pulse width modulation buck-boost converter is analyzed, where the effects of duty cycle, input voltage, output power, voltage gain and time duration are evaluated. These analyses are performed in both continuous and discontinuous conduction modes and Markov process model is utilized to obtain the results. In addition, mean time to failure of this converter is obtained with respect to the aforementioned parameters. In this paper, detailed analyses of reliability in buck-boost converter with different evaluation parameters are presented. Moreover, the plots of MATLAB software are prepared to have complete evaluation in each operating state.
本文分析了传统脉宽调制降压-升压变换器的可靠性,评估了占空比、输入电压、输出功率、电压增益和持续时间对其可靠性的影响。这些分析是在连续和不连续的传导模式下进行的,并使用马尔可夫过程模型来获得结果。此外,还得到了该变换器相对于上述参数的平均失效时间。本文详细分析了不同评估参数下buck-boost变换器的可靠性。并编制了MATLAB软件的绘图,在各个运行状态下进行完整的评估。
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引用次数: 8
Control of Single-Phase Bidirectional PEV/EV Charger Based on FCS-MPC Method for V2G Reactive Power Operation 基于FCS-MPC方法的V2G无功运行单相双向PEV/EV充电器控制
K. K. Monfared, H. Iman‐Eini, R. Razi
This paper presents the design of a finite control set model predictive controller (FCS-MPC) for single-phase bidirectional PEV/EV charger for vehicle to grid (V2G) reactive power operation. In addition to charging the battery, the proposed method can provide reactive power to the utility grid. The desired topology of the charger consists of two stages; a multilevel H-Bridge AC–DC converter and an isolated DBRCS bidirectional DC–DC converter. The AC-DC converter is controlled by the FCS-MPC strategy, which, in addition to simplicity, improves the dynamic performance of the battery charger. Furthermore, the single-phase shift (SPS) control is used for the DC-DC converter. This paper investigates single-phase schemes of the proposed charger and control system. The proposed control of battery charger is theoretically analyzed and the simulation results are presented using the MATLAB/SIMULINK software.
针对车辆对电网(V2G)无功运行的单相双向PEV/EV充电器,设计了一种有限控制集模型预测控制器(FCS-MPC)。除了为蓄电池充电外,该方法还可以向电网提供无功功率。期望的充电器拓扑结构由两个阶段组成;一个多电平h桥AC-DC变换器和一个隔离型DBRCS双向DC-DC变换器。AC-DC转换器采用FCS-MPC策略控制,除了简单之外,还提高了电池充电器的动态性能。此外,还对DC-DC变换器采用了单相移位(SPS)控制。本文对所提出的充电器和控制系统的单相方案进行了研究。对所提出的电池充电器控制方法进行了理论分析,并利用MATLAB/SIMULINK软件给出了仿真结果。
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引用次数: 5
A Single Phase Boost Switched-Capacitor Multilevel Inverter Topology 一种单相升压开关电容多电平逆变器拓扑
Abbas Mahdavi, K. Abbasazdeh, Mohammad Hatami Abbasi
In this paper a single phase switched-capacitor inverter is presented which generates the nine-level output with two DC sources. Compared to the other multilevel inverters (MLIs), the proposed inverter can reduce the circuit constituents like as power switches, diodes and capacitors which this feature leads to increase in efficiency of the inverter and decreases the switching and conduction losses. Moreover, this topology has the ability to voltage boosting. Another benefit of the presented inverter is the capacitor’s voltage balancing in each cycle that means no need to auxiliary circuits to keep balance the capacitors. Therefore the size, weight, outlay of the inverter and complication of the control strategy is reduced.
本文介绍了一种用两个直流电源产生九电平输出的单相开关电容逆变器。与其他多电平逆变器相比,该逆变器可以减少功率开关、二极管和电容器等电路元件,从而提高逆变器的效率,降低开关和导通损耗。此外,这种拓扑结构具有升压的能力。该逆变器的另一个优点是电容器在每个周期内的电压平衡,这意味着不需要辅助电路来保持电容器的平衡。从而减少了逆变器的体积、重量、费用和控制策略的复杂性。
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引用次数: 6
A Transformerless Quadratic Buck-Boost Converter Suitable for Renewable Applications 一种适用于可再生能源应用的无变压器二次型降压变换器
H. Gholizadeh, A. Sarikhani, M. Hamzeh
This paper introduces a quadratic buck-boost converter with positive load terminal voltage. Compared to conventional buck-boost converter, the voltage ratio of the introduced topology is squared times of the conventional one. Broad span of the output voltage is one of the advantages of the introduced topology. The continuity of the input current makes this type of converters convenient for renewable energy sources. Continuous output current is another advantage of introduced converter, which decreases the current stress on the load terminal capacitor. Principle operations and steady state analysis are done in continuous current mode. Eventually, the implementation of the introduced topology is evaluated on simulation outcomes.
本文介绍了一种具有正负载端电压的二次型降压-升压变换器。与传统的降压-升压变换器相比,所引入的拓扑的电压比是传统拓扑的平方倍。宽的输出电压跨度是所引入的拓扑结构的优点之一。输入电流的连续性使这种类型的变换器方便用于可再生能源。连续输出电流是引入的变换器的另一个优点,它减少了负载端电容器的电流应力。原理运算和稳态分析在连续电流模式下完成。最后,通过仿真结果对所引入拓扑的实现进行了评估。
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引用次数: 21
Simulation of a Multi-Level Resonant Flying-Capacitor Converter above Resonant Frequency to Overcome Its Voltage Regulation Issue 克服谐振频率以上多级谐振飞电容变换器电压调节问题的仿真研究
S. Hashemi, Atefeh Salehian, R. Beiranvand, A. Yazdian
This paper presents a Flying-Capacitor converter above its resonant frequency considering zero-voltage switching (ZVS) realization and voltage regulation issue due to wide input voltage and output power variations. A new multi-level Flying-Capacitor (FC) dc/dc converter is candidate among the other proposed topologies with lower power device count and soft switching characteristics that results in lower electromagnetic interference and switching losses. ZVS operation under the continuous conduction mode (CCM) operation has achieved undeniable benefits in switching losses and therefore a higher efficiency. In the MOSFET-based converters, the ZVS operation causes lower switching losses in contrary to the wide used zero current switching (ZCS) approaches under the discontinuous conduction mode (DCM). However, in this topology a natural ZCS operation of the diodes under the CCM condition is occurred which impels even to higher efficiency, too. In addition, output voltage regulation has been clearly revealed and when wide input voltage and output power variations are applied.
本文提出了一种谐振频率以上的飞电容变换器,考虑了零电压开关(ZVS)的实现以及宽输入电压和输出功率变化引起的电压调节问题。一种新的多级飞电容(FC) dc/dc变换器是其他提出的拓扑结构的候选方案,具有更低的功率器件计数和软开关特性,从而降低电磁干扰和开关损耗。在连续导通模式(CCM)下运行的ZVS在开关损耗方面取得了不可否认的优势,因此效率更高。在基于mosfet的变换器中,与在不连续导通模式(DCM)下广泛使用的零电流开关(ZCS)方法相反,ZVS操作导致更低的开关损耗。然而,在这种拓扑结构中,二极管在CCM条件下发生了自然的ZCS操作,这也推动了更高的效率。此外,当输入电压和输出功率变化较大时,输出电压调节已被清楚地揭示出来。
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引用次数: 0
Analyzing Delay-Power Relationship of the Grid-Connected Inverters in System Small Signal Stability 系统小信号稳定中并网逆变器延迟功率关系分析
M. Ghaderi, N. Rashidirad, M. Hamzeh
The paper ahead concentrates on the stability issue of three-phase grid-connected inverters, by considering the delay time of digital control systems. To this aim, at first, it has been shown that the existence of delay influences on system stability improvement. Further, our more detailed studies show that, in terms of stability, there is a relationship between the delay and the power of inverters, called as delay-power relationship for inverters connected to the grid. The principle of the mentioned relationship is based on the fact that more powers lead to lower stability margins, especially at higher frequencies. Finally, simulation results verify the analysis resulted by the impedance-based method.
本文通过考虑数字控制系统的延迟时间,对三相并网逆变器的稳定性问题进行了研究。为此,首先证明了时滞的存在对系统稳定性改善的影响。此外,我们更详细的研究表明,在稳定性方面,延迟与逆变器功率之间存在关系,称为逆变器并网延迟-功率关系。上述关系的原理是基于这样一个事实,即更大的功率导致更低的稳定裕度,特别是在更高的频率下。最后,仿真结果验证了基于阻抗方法的分析结果。
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引用次数: 1
Portable Remotely Operated Underwater Smart Vehicle with a Camera and an Arm 携带相机和手臂的便携式遥控水下智能车辆
M. Farkhadov, A. Abramenkov, A. Abdulov, A. Eliseev
In this paper we present a remotely operated underwater smart vehicle. We demonstrate that smart features can be added to a dumb analogue remotely operated underwater drone by a small team of engineers on tight budget. Our vehicle maintains compass and depth headings, records video to an onshore terminal. In addition, our vehicle has a remotely operated arm with 3 degrees of freedom. Our ROV won the first prize on AquaRoboTech 2018 competition and has a potential to be upgraded with advanced machine vision algorithms.
本文提出了一种遥控水下智能航行器。我们证明了智能功能可以添加到一个哑模拟遥控水下无人机由一个小团队的工程师在紧张的预算。我们的船保持罗盘和深度航向,向岸上终端录下视频。此外,我们的车辆有一个具有3个自由度的远程操作手臂。我们的ROV在2018年的AquaRoboTech比赛中获得了一等奖,并有可能通过先进的机器视觉算法进行升级。
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引用次数: 2
A Novel Triple Quadrature Pad for Inductive Power Transfer Systems for Electric Vehicle Charging 一种新型电动汽车充电感应功率传输系统的三重正交垫
Bita Esmaeili Jamakani, E. Afjei, A. Mosallanejad
This paper proposes a novel Inductive Power Transfer (IPT) pad called Triple Quadrature Pad (TQP) consisting of three decoupled coils controlled independently as a primary pad with various excitation modes to enhance tolerance to horizontal displacement as well as air-gap variations. Operation of this pad is compared with Bipolar Pad (BPP) as the most effective IPT pad when used with Double-D Pad (DDP) and Circular Pad (CP) as polarized and non-polarized secondary pads, respectively, to show interoperability between different magnetic topologies. In addition, a variable excitation mode based on relative phase control of these three coils is applied which makes power transmission in large lateral misalignments. TQP is designed to maintained leakage magnetic flux below ICNIRP guidelines. Uncompensated power and coupling coefficient of most effective excitation modes as function of lateral displacement of both TQP and BPP used with DDP and CP as secondary pads are compared and power transferability of TQP to maintain required coupling coefficient in various air-gap have been also investigated.
本文提出了一种新型的感应功率传输(IPT)衬垫,称为三重正交衬垫(TQP),该衬垫由三个独立控制的解耦线圈组成,作为具有各种激励模式的主衬垫,以提高对水平位移和气隙变化的容错能力。与双极pad (DDP)和圆形pad (CP)分别作为极化和非极化副垫使用时,双极pad (BPP)作为最有效的IPT pad的运行情况进行了比较,以显示不同磁拓扑之间的互操作性。此外,还采用了基于相对相位控制的变励磁方式,使三种线圈的功率传输处于较大的横向失调状态。TQP旨在将漏磁保持在ICNIRP指南以下。比较了以DDP和CP作为二次衬垫的TQP和BPP的最有效激励模式的未补偿功率和耦合系数随侧向位移的变化,并研究了TQP在不同气隙中维持所需耦合系数的功率转移能力。
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引用次数: 10
A Family of High Step-Up A-Source Inverters with Clamped DC-Link Voltage 具有箝位直流电压的高升压A源逆变器系列
Soroush Esmaeili, S. Karimi, A. Mostaan, A. Iqbal, A. Siadatan
A family of novel impedance source inverters based on an auto-transformer is presented in this manuscript. The proposed topologies utilize minimal coupled inductors turns ratio to obtain high voltage boost ability in comparison with previous magnetically coupled impedance source inverters. The impedance source inverters using coupled inductors attain high voltage gain in smaller shoot-through interval compared to transformer-less group, but they suffer dc-link voltage spikes due to leakage inductances of their coupled inductors. So, in presented inverters, absorbing circuits are utilized to reduce these spikes. Besides that, absorbing circuits lead to higher voltage boost ability, lower shoot-through duty cycle and better modulation index. In addition, all the novel structures have continuous input current which is suitable for renewable energy sources such as fuel cell and photovoltaic systems. Theoretical analysis in steady state and simulation results are presented to verify the inverters performance.
本文介绍了一种基于自耦变压器的新型阻抗源逆变器。与以前的磁耦合阻抗源逆变器相比,所提出的拓扑结构利用最小的耦合电感匝比来获得高电压升压能力。与无变压器组相比,使用耦合电感的阻抗源逆变器在更小的穿透间隔内获得高电压增益,但由于其耦合电感的漏电感,它们遭受直流链路电压尖峰。因此,在逆变器中,吸收电路被用来减少这些尖峰。此外,吸收电路具有更高的升压能力、更低的穿透占空比和更好的调制指数。此外,所有新结构都具有连续输入电流,适用于燃料电池和光伏等可再生能源系统。通过稳态理论分析和仿真结果验证了逆变器的性能。
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引用次数: 4
期刊
2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)
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