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2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)最新文献

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Optimal Design of a Permanent Magnet Synchronous Motor Using the Cultural Algorithm 基于文化算法的永磁同步电机优化设计
Pub Date : 2021-02-02 DOI: 10.1109/PEDSTC52094.2021.9405839
Tohid Sharifi, M. Mirsalim
In this paper, a permanent magnet synchronous motor (PMSM) structure is optimized by a single-objective optimization method known as the cultural algorithm (CA). The torque capability of the PMSM is high due to the presence of the permanent magnets (PMs) in its structure. However, in critical applications with limited space (especially with volume limitation), the torque density is a more prominent function than the torque. For this reason, in the optimization problem presented in this paper, the torque density is the objective function. Therefore, this study aims to maximize the torque capability at a specified space besides maintaining the torque ripple under a specified value (as a constraint). To this, the structural parameters of the machine are optimized by the CA. An additional decision variable is also considered, and an important effect is concluded from that. The mathematical basics of the CA, operators, and other settings of the algorithm are also introduced. The results of the optimization process would be presented and compared with the initial machine design. These results demonstrate that the CA increases the torque density of the machine and keeps the torque ripple under the specified value. After the optimization results and comparisons, the electromagnetic performance of the motor is presented.
本文采用一种被称为文化算法(CA)的单目标优化方法对永磁同步电机(PMSM)结构进行优化。永磁同步电机由于其结构中存在永磁体而具有较高的转矩能力。然而,在空间有限(特别是体积有限)的关键应用中,扭矩密度是比扭矩更突出的函数。因此,在本文提出的优化问题中,以扭矩密度为目标函数。因此,除了将转矩脉动保持在规定值下(作为约束)外,本研究的目标是在指定空间内最大限度地提高转矩能力。为此,通过CA对机器的结构参数进行了优化,并考虑了一个额外的决策变量,得出了一个重要的结论。还介绍了CA的数学基础、运算符和算法的其他设置。将给出优化过程的结果,并与初始机器设计进行比较。结果表明,CA增加了电机的转矩密度,使转矩脉动保持在规定值以内。根据优化结果和对比,给出了电机的电磁性能。
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引用次数: 0
Single-Phase Dynamic Voltage Restorer Based on AC-AC Trans-Z-Source Converter for Voltage Sag and Swell Mitigation 基于AC-AC反z源变换器的单相动态电压恢复器抑制电压跌落和膨胀
Pub Date : 2021-02-02 DOI: 10.1109/PEDSTC52094.2021.9405845
S. Mousavi, E. Babaei
In this paper, a new single-phase single-stage dynamic voltage restorer (DVR) based on AC-AC trans-Z-source converter is proposed. The proposed DVR is connected directly to the grid and the energy required for compensation is provided by it. Therefore, there is no need for large energy storage elements such as DC-link. A coupled inductor is employed in impedance network of the proposed DVR to compensate deep voltage sags. The safe commutation strategy used in the Z-source converter ensures that any voltage and current spikes occur on the switches. The analysis of the Z-source converter circuit and the performance of the proposed DVR are given. To verify the performance and capability of the proposed system, the simulation results are presented in the PSCAD/EMTDC software.
本文提出了一种基于交流反- z源变换器的单相单级动态电压恢复器(DVR)。所提出的DVR直接与电网连接,补偿所需的能量由其提供。因此,不需要DC-link等大型储能元件。在DVR的阻抗网络中采用了一个耦合电感来补偿深度电压跌落。z源变换器中使用的安全换相策略确保开关上出现任何电压和电流尖峰。对z源变换器电路进行了分析,并对所设计的DVR进行了性能分析。为了验证所提出系统的性能和能力,在PSCAD/EMTDC软件中给出了仿真结果。
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引用次数: 6
Maximum Power Per Current Control for Dynamic WPT Systems 动态WPT系统的每电流最大功率控制
Pub Date : 2021-02-02 DOI: 10.1109/PEDSTC52094.2021.9405825
Sina Nvaiyan-Kalat, S. Vaez‐Zadeh, A. Zakerian
Wireless Power Transfer (WPT) systems can be used to charge electric vehicles (EVs) in both static and dynamic modes. These systems must be able to provide the required load power which varies according to EV driving cycles. Meanwhile, supplying high load power requires high current ratings of WPT infrastructure which makes a practical system costly. In this paper, a control method is proposed in order to deal with the issue. The control method adjusts duty ratios of the secondary buck converter as well as the high-frequency of the primary inverter to achieve the maximum output power for the inverter output current (MPPA). Therefore, the high load power can be provided by a structure which is neither over-designed in advance nor risk of over-current during operation. This is achieved by prioritizing the provision of the load power rather than the system efficiency maximization during the short period of acceleration. Therefore, the overall optimum efficiency operation of the system would not be violated extremely. The simulation results validate the effectiveness of the proposed control method.
无线电力传输(WPT)系统可以在静态和动态模式下为电动汽车(ev)充电。这些系统必须能够根据电动汽车的行驶周期提供所需的负载功率。同时,提供高负荷电力需要高额定电流的WPT基础设施,这使得实际系统成本高昂。为了解决这一问题,本文提出了一种控制方法。该控制方法通过调节二次降压变换器的占空比和一次逆变器的高频来实现逆变器输出电流(MPPA)的最大输出功率。因此,这种结构既不会提前过度设计,也不会在运行过程中产生过流风险,从而可以提供高负载功率。这是通过在短期加速期间优先提供负载功率而不是系统效率最大化来实现的。因此,系统的整体最优效率运行不会受到极大的破坏。仿真结果验证了所提控制方法的有效性。
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引用次数: 3
A New MPC-based Approach for Torque Ripple Reduction in BLDC Motor Drive 基于mpc的无刷直流电动机转矩脉动抑制新方法
Pub Date : 2021-02-02 DOI: 10.1109/PEDSTC52094.2021.9405871
Seyed Mohammd Taher, A. Halvaei Niasar, Seyed Abbas Taher
In this paper, a new model predictive control (MPC) is proposed for brushless DC motor (BLDCM) to reduce the commutation torque ripple (CTR). The torque ripples generate vibration noise and reduce the efficiency. With purpose of minimizing the CTR of the BLDCM and considering the CTR sources, the proposed MPC scheme is designed by predicting the phase current and electromagnetic torque. The error square of predicted values of non-commutating current and electromagnetic torque, which are minimized in the cost function, determines the optimal switching states. The proposed MPC control is applied at commutation moments which is detected by analysis of Hall sensor signal. This control scheme is implemented on the traditional topology of the BLDCM driving system which facilitates the implementation. Considering a 210V-2000W BLDCM, the comparative analysis using the MATLAB/Simulink environment is carried out in terms of the CTR reduction, tracking of the reference current under low-speed, high-speed and load torque tracking. The key parameters’ responses of BLDCM illustrate the improvement of the CTR, fast-transient response and small steady-state errors by using the proposed MPC against the conventional PI-PWM.
针对无刷直流电动机的换相转矩脉动,提出了一种新的模型预测控制方法。转矩脉动产生振动噪声,降低了效率。以最小化无刷直流电机的CTR为目标,考虑CTR源,通过预测相电流和电磁转矩来设计MPC方案。代价函数中最小的非换流电流和电磁转矩预测值的误差平方决定了最优开关状态。本文提出的MPC控制应用于换相力矩,该换相力矩通过霍尔传感器信号的分析来检测。该控制方案是在无刷直流电机驱动系统的传统拓扑结构上实现的,便于实现。以210V-2000W无刷直流电机为例,利用MATLAB/Simulink环境对CTR降低、低速、高速下基准电流跟踪和负载转矩跟踪进行了对比分析。对无刷直流电机关键参数的响应表明,与传统的PI-PWM相比,采用本文提出的MPC提高了CTR,瞬态响应快,稳态误差小。
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引用次数: 3
Analysis and Investigation of a Soft-Switched Synchronous Buck Converter 软开关同步降压变换器的分析与研究
Pub Date : 2021-02-02 DOI: 10.1109/PEDSTC52094.2021.9405843
Peyman Alavi Tabbat, Arash Khoshkbar-Sadigh, Iman Talebian, Vafa Marzang, E. Babaei
In this article, a soft-switched structure for the synchronous buck converters is proposed and analyzed. In this structure, by adding an LC circuit to the synchronous buck converter, soft-switching condition performance is obtained. Both the main and synchronous power switches turn on and turn off under ZVS condition. Therefore, the switching losses are eliminated completely and high power efficiencies can be obtained by implementing the proposed converter. In this article, the proposed structure and its operational modes are investigated in details. The proposed converter is compared with other soft-switched synchronous converters and the results are investigated comprehensively. The efficiency of the proposed converter is obtained and compared to the hard-switched converter. In addition, in order to validate the desired operation of the proposed structure, a 200W sample of this converter is simulated in the PSCAD software and the achieved results are analyzed in details.
本文提出并分析了同步降压变换器的软开关结构。在该结构中,通过在同步降压变换器中加入LC电路,获得了软开关条件的性能。主电源开关和同步电源开关在ZVS状态下都打开和关闭。因此,完全消除了开关损耗,实现了高功率效率。本文对所提出的结构及其运行模式进行了详细的研究。将该变换器与其他软开关同步变换器进行了比较,并对结果进行了全面的研究。计算了该变换器的效率,并与硬开关变换器进行了比较。此外,为了验证所提出结构的预期工作效果,在PSCAD软件中对该变换器的200W样品进行了仿真,并对仿真结果进行了详细分析。
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引用次数: 0
Proposing an Effective Armature Winding for a Small DC Motor using Sensitivity Analysis Based Algorithm 基于灵敏度分析算法提出一种小型直流电动机的有效电枢绕组
Pub Date : 2021-02-02 DOI: 10.1109/PEDSTC52094.2021.9405854
Ahmadreza Karami-Shahnani, R. Nasiri-Zarandi, K. Abbaszadeh, Ali Jamalifard
This paper presents a new algorithm based on sensitivity analysis for changing the armature winding of a PMDC motor for an electro-fan application to increase the motor efficiency. The optimum values such as inner voltage drop and cross-sectional area of the conductors obtain from sensitivity analysis. An analytic model is used to describe motor performance and losses calculation. Some experimental tests are performed to validate the FEM time-simulation model and the analytical model. The proposed algorithm is used to get the desired efficiency, as well as motor parameters calculation. The final design that extracted from the proposed algorithm is compared with the FEM results where an acceptable adoption is resulted.
本文提出了一种基于灵敏度分析的新算法,用于改变电风扇用PMDC电机的电枢绕组,以提高电机效率。通过灵敏度分析,得到了导线内压降和截面积等最佳值。采用解析模型描述电机性能和损耗计算。通过实验验证了有限元时间模拟模型和解析模型的正确性。该算法用于获得期望的效率,以及电机参数的计算。将该算法提取的最终设计结果与有限元计算结果进行了比较,得到了可接受的采用结果。
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引用次数: 1
Performance Improvement of Control System for Wireless Charging of Electric Vehicle 电动汽车无线充电控制系统的性能改进
Pub Date : 2021-02-02 DOI: 10.1109/PEDSTC52094.2021.9405857
Danial Karimi Babaahmadi, M. Hamzeh, S. Farhangi
In this paper, a control strategy is proposed for the wireless charging of electric vehicles (EV) with doubled-sided LCC compensation networks. Despite the conventional chargers, an active rectifier is used in this work, and therefor the DC-DC converter is eliminated. In order to achieve soft-switching in both side converters, a new method is presented, which estimates the phase-shift angle for active rectifier on the secondary side. Using the steady-state (SS) analytical model, and the first harmonic approximation (FHA) method, the phase-shift angle for inverter on the primary side is calculated. In that regard, closed-loop control is applied to the system model, and the simulation results are presented.
提出了一种基于双面LCC补偿网络的电动汽车无线充电控制策略。尽管有传统的充电器,但在这项工作中使用了有源整流器,因此消除了DC-DC转换器。为了实现双侧变换器的软开关,提出了一种估计二次侧有源整流器相移角的新方法。利用稳态(SS)解析模型和一次谐波近似(FHA)方法,计算了逆变器一次侧的相移角。为此,对系统模型进行了闭环控制,并给出了仿真结果。
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引用次数: 1
Developed Experimental Analysis of Current THD of The CPV System Using Continuous Input-current Buck-Boost DC-DC Converter 采用连续输入电流Buck-Boost DC-DC变换器对CPV系统的电流THD进行了实验分析
Pub Date : 2021-02-02 DOI: 10.1109/PEDSTC52094.2021.9405910
M. Eldoromi, Amir Abbas Aghajani, R. Emadifar, Ali Akbar Moti Birjandi
This paper presents an experimental procedure and a simulation model of a novel concentrating photovoltaic (CPV) system containing a parabolic trough solar photovoltaic collector unit. The designed system using a parabolic trough solar collector for concentrating more solar irradiance to produce more energy. Due to the increase in electrical energy production in this method, a fuel cell has been used to store excess energy. Buck-boost converter topology with continuous input-current capability provided for extending fuel cells life-time. This power converter not only contains the important advantages found in typical topologies, but also using a reduced number of electronic components. Experiments on the provided system were carried out in Tehran, Iran, and experimental results showed that the main problem with the concentration of solar radiation is the rising temperature of the solar cell, which for every 1% increase in temperature, its efficiency decreases by 0.4% to 0.5%. To solve this problem, a heat absorber is used behind the cell plate. The variation of temperature and irradiation values tend to change the current THD. Due to the increase in radiation intensity by the concentrating system, its effect on current THD has also been analyzed.
本文介绍了一种新型聚光光伏(CPV)系统的实验过程和仿真模型。设计的系统采用抛物线槽太阳能集热器集中更多的太阳辐照度,以产生更多的能量。由于这种方法产生的电能增加,燃料电池被用来储存多余的能量。Buck-boost转换器拓扑结构具有连续输入电流能力,可延长燃料电池的使用寿命。这种功率转换器不仅具有典型拓扑结构的重要优点,而且使用的电子元件数量也减少了。在伊朗德黑兰对所提供的系统进行了实验,实验结果表明,太阳辐射集中的主要问题是太阳能电池的温度升高,温度每升高1%,其效率下降0.4% ~ 0.5%。为了解决这个问题,在电池板后面使用了一个吸热器。温度和辐照值的变化倾向于改变当前的THD。由于聚光系统辐射强度的增加,对电流THD的影响也进行了分析。
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引用次数: 1
Transformerless Grid-Connected Asymmetric PV Inverter with Constant CMV and Reactive Power Injection Capability 具有恒定CMV和无功注入能力的无变压器并网非对称光伏逆变器
Pub Date : 2021-02-02 DOI: 10.1109/PEDSTC52094.2021.9405927
F. Mohammadi, H. Rastegar, M. Farhadi‐Kangarlu
Transformerless inverters have been commonly used in grid-connected photovoltaic (PV) systems due to their high power density, low weight and volume, and high efficiency. However, they also suffer from the issue of leakage current. On the other hand, the ability to inject reactive power is another challenge of transformerless grid-connected PV inverters. In order to reduce leakage current and provide reactive power injection (RPI) capability, a single-phase transformerless grid-connected asymmetric phase-legs PV inverter is presented in this paper. The proposed inverter improves the conventional hybrid phase-legs PV inverter, ensuring that the common-mode voltage (CMV) is always constant. As a result, the high-frequency CMV is avoided, and the leakage current is diminished. Also, the proposed inverter has the same performance in the grid power factor of unity and non-unity. In order to validate the operation of the proposed PV inverter, the simulation results are presented and compared with the conventional hybrid phase-legs inverter based on a 1 kW sample.
无变压器逆变器因其功率密度高、重量小、体积小、效率高等优点,已广泛应用于并网光伏系统中。然而,它们也受到漏电流问题的困扰。另一方面,注入无功功率的能力是无变压器并网光伏逆变器的另一个挑战。为了降低漏电电流,提供无功功率注入(RPI)能力,本文提出了一种单相无变压器并网的非对称相腿光伏逆变器。该逆变器对传统的混合相腿式光伏逆变器进行了改进,保证了共模电压(CMV)始终不变。从而避免了高频CMV,减小了漏电流。同时,该逆变器在电网功率因数统一和非统一情况下具有相同的性能。为了验证提出的光伏逆变器的操作,并给出了仿真结果并与传统的混合phase-legs逆变器基于1千瓦示例。
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引用次数: 1
A Common Ground Transformer-less High Gain DC-DC Buck-Boost Converter 无共地变压器高增益DC-DC降压-升压变换器
Pub Date : 2021-02-02 DOI: 10.1109/PEDSTC52094.2021.9405964
S. Hosseini, Masoud Farhadi, R. Ghazi
enhancing the voltage ratio in a converter is a leading aim to improve its performance. Regarding this goal, this paper proposes a new topology of buck-boost converter. The proposed converter offers a much higher voltage gain ratio in comparison to its relevant high gain buck-boost structures. The range of duty cycle has widened in this converter without adopting any transformers or coupled inductors in its configuration. The number of components is quite a few. Therefore, this converter is quite easy to be controlled. Furthermore, the common electrical ground between the input and output ports of the presented converter has preserved. Hence, this structure is an appropriate choice to be utilized in several industrial applications. Calculations of voltage and current have made for this converter. The amount of each component has designed. The proper performance of this topology has evaluated and validated by PSIM Simulink software.
提高变换器的电压比是提高变换器性能的主要目的。为此,本文提出了一种新的降压-升压变换器拓扑结构。与相关的高增益降压升压结构相比,所提出的转换器提供了更高的电压增益比。在不采用变压器和电感耦合的情况下,变换器的占空比范围得到了扩大。组件的数量相当多。因此,这种转换器很容易控制。此外,所提出的转换器的输入和输出端口之间的公共电气接地被保留。因此,这种结构是在几种工业应用中使用的适当选择。对该变换器进行了电压和电流的计算。每个部件的数量都有设计。通过PSIM Simulink软件对该拓扑的性能进行了评估和验证。
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引用次数: 5
期刊
2021 12th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)
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