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ThD Analysis of Cascaded h-bridge Inverter with Fuzzy Logic Controller

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Circuits and Systems 2017年第7期8卷 171-183页

作者： Sivakumar N. Sumathi A. Department of EEE Jayalakshmi Institute of Technology Thoppur India Department of ECE Adhiyamaan College of Engineering Hosur India

In recent days, the multilevel inverter technology is widely applied to domestic and industrial applications for medium voltage conversion. But, the power quality issues of the multilevel inverter limit the usage of much sensitive equipment like medical instruments. The lower distortion level of the output voltage and current can generate a quality sinusoidal output voltage in inverters and they can be used for many applications. The harmonics can cause major problems in equipments due to the nonlinear loads connected with the power system. So, it is necessary to minimize the losses to raise its overall efficiency. In this paper, a new topology of seven level asymmetrical cascaded h-bridge multilevel inverter with a Fuzzy logic controller had been implemented to reduce the Total harmonic Distortion (ThD) and to improve the overall performance of the inverter. The proposed model is well suited for use with a solar PV application. In this topology, only six IGBT switches are used with three different voltage ratings of PV modules (1:2:4). The lower number of semiconductor switches leads to minimizing overall di/dt ratings and voltage stress on each switches and switching losses. The gate pulses generated by Sinusoidal Pulse Width Modulation (SPWM) technique with a Fuzzy logic controller are also introduced. A buck-boost converter is used to maintain the constant PV voltage level integrated by an MPPT technique followed by Perturb and Observer algorithm is also implemented. The MPPT is used to harness the maximum power of solar radiations under its various climatic conditions. The new topology is evaluated by a Matlab/Simulink model and compared with a hardware model. The results proved that the ThD achieved by this topology is 1.66% and realized that it meets the IEEE harmonic standards.

关键词： Cascaded h-bridge Multilevel Inverter ThD Photo Voltaic Modules SPWM Fuzzy Logic Controller MPPT Technique

Design and Evaluation of Solar Inverter for Different Power Factor Loads

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Energy and Power Engineering 2012年第5期4卷 324-329页

作者： Mohammad Ahmad B. h. Khan M. Tech Student Department of Electrical Engineering Aligarh Muslim University (AMU) Aligarh India Professor Department of Electrical Engineering Aligarh Muslim University (AMU) Aligarh India

This paper analyzes and compares the performance of a new inverter topology with two types of input sources: 1) Solar PV source and 2) Ideal dc source (battery). The simulation is done in SIMULINK/MATLAB Software. It is shown that when the solar panel is connected, spikes are obtained in output voltage waveforms. These spikes are eliminated by inserting a capacitor. The capacitor is chosen for a particular power factor which is optimum with respect to cost, size and power quality. Total harmonic Distortion, Active Power, Reactive Power, RMS Voltage and RMS Current are measured for different load power factor. Finally these results are compared with those obtained using battery with same input voltage magnitude. This Paper shows that for Solar Panel Circuit, ThD, P and Q are less for 0.8 and above power factor, however below 0.8 PF, the ThD, active and reactive power transfer are more. This means that the performance of Solar Panel in the proposed circuit topology is seen to be better as compared to the same circuit with battery within a range of power factor.

关键词： h-bridge Inverter Level Module (LM) Power Quality Power Factor Total harmonic Distortion (ThD)

A New Structure of Multilevel Inverter with Reduced Number of Switches for Electric Vehicle Applications

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Energy and Power Engineering 2011年第2期3卷 198-205页

作者： M. Ebadpour M. B. B. Sharifian S. h. hosseini 不详

Both hybrid Electric Vehicles (hEVs) and Electric Vehicles (EVs) need a traction motor and a power in-verter to drive the traction motor. The requirements for the power inverter include high peak power, opti-mum consumption of energy, low output harmonics and inexpensive circuit. In this paper, a new structure of multilevel inverter with reduced number of switches is proposed for electric vehicle applications. It consists of an h-bridge and an inverter in each phase which produces multilevel voltage by switching the dc voltage sources in series. As the number of switches are reduced, both conduction and switching losses will be de-creased, which leads to increase the efficiency of converter. The size and power consumption of driving cir-cuits are also reduced. The proposed three phase inverter can produces more number of voltage levels in the same number of the voltage source and reduced number of switches compared to the conventional inverters. This structure minimizes the total harmonic distortion (ThD) of the output voltage waveforms. The structure of proposed multilevel inverter, modulation method, switching losses, ThD calculation and simulation re-sults with PSCAD/EMTDC software are shown in this paper.

关键词： Cascaded h-bridge Electric Vehicles (EVs) hybrid Modulation Inverters Traction Motors

New Approach of Multi-Cell Stacked Cell Inverter for Solar Photovoltaic System

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Journal of Power and Energy Engineering 2023年第1期11卷 1-17页

作者： François Yonga Colince Welba Abdouramani Dadjé Noël Djongyang Department of Renewable Energies National Higher Polytechnic School of Maroua University of Maroua Maroua Cameroon Department of Fundamental Sciences National Advanced School of Mines and Petroleum Industries University of Maroua Maroua Cameroon School of Geology and Mining University of Ngaoundere Ngaoundere Cameroon

In this paper, a new inverter topology dedicated to isolated or grid-connected PV systems is proposed. This inverter is based on the structures of a stacked multi-cell converter (SMC) and an h-bridge. This new topology has allowed the voltage stresses of the converter to be distributed among several switching cells. Secondly, divide the input voltage into several fractions to reduce the number of power semiconductors to be switched. In this contribution, the general topology of this micro-inverter has been described and the simulation tests developed to validate its operation have been presented. Finally, we discussed the simulation results, the efficiency of this topology and the feasibility of its use in a grid-connected photovoltaic production system.

关键词： Photovoltaic System Micro-Inverter Stacked Multi-Cell Converter (SMC) h-bridge Pulse Width Modulation (PWM)

The Design of Drive Circuit with high-power Output for Two-phase hybrid Stepping Motor Based on BY-5064

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Computer Aided Drafting,Design and Manufacturing 2011年第1期21卷 28-32页

作者： MA Xiao-jiao LI Cheng-gui CAI Zheng ZhAO Li-guo School of Instrumentation Science and Opto-Electronics Engineering Beijing University of Aeronautics and Astronautics Beijing 100191 China

A kind of drive circuit which high-power output for stepping motor, based two-phase hybrid stepping motor are designed, achieved. is low power consumption, high-performance and on BY-5064, and a kind of dedicated circ... 详细信息

关键词： BY-5064 MOSFET h-bridge power amplifier

System design of touch type DC motor

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International English Education Research 2016年第2期 5-7页

作者： ShEN TianJunyi ZhANG Yan REN Xibao College of Mechanical and Electrical Engineering hainan University HaiKou China

This paper focuses on the use of the touchpad （key）, STC89C51RC monolithic integrated circuit PWM control signal, which changed the traditional mechanical buttons as a DC motor rotational speed and steering control method. Touch switch advantages compared with the traditional mechanical switches are： first, the quieter second, more sensitive; third, faster; four, long life and so on. Specialized chips are also used in the article the PWM signal system, and the principle of PWM signal, method and how the software adjust the duty cycle of the PWM signal to control its input signal waveforms are are described in detail. In addition, this article also introduced consisting of triode amplifier circuit of h-bridge amplifier as a DC motor driving module, enabling the control of DC motor speed. On the software side, PI was described in detail in the article arithmetic program initializes write ideas and specific programs such as program implementation.

关键词： touch the PWM signal single-chip h-bridge