Boost Chopper Research Articles

Performance of the Boost Chopper, Comparative Study between PI Control and Neural Control to Regulate Its Output Voltage

In this study, we investigate the performance of a boost converter regulating its output voltage using two control methods: Proportional-Integral (PI) control and neural control. Both methods are implemented on a simulation platform (Matlab/Simulink) and evaluated in terms of accuracy, response speed, and robustness to disturbances. Indeed, the output voltage of converters exhibits imperfections that require a control method to optimize efficiency when applying a variable load. Results show that neural control offers superior performance in terms of accuracy and response time, with faster and more precise regulation of the output voltage. On the other hand, PI control proves to be more robust against disturbances. These findings can help guide the selection of the appropriate control method for a boost converter based on the specific requirements of each application.

Comparative Study of Different MPPT Methods of a Boost Chopper of PV Generator

Abstract In this article, we focus on improving the performance and efficiency of photovoltaic systems. The main objective is to study and compare the performance of different MPPT methods, and to find the most efficient method (in terms of convergence speed, the MPP point where the oscillation is reduced), so that the generator of maximum power supplied by the photovoltaic can be extracted.. The main points involved in this research are: Modeling of the photovoltaic system Simulation of four MPPT algorithms. The simulation results are obtained using simulink in matlab.

Extremum seeking control of PV system based on least- squares approach (real-time optimization)

Today renewable energy has become an absolute necessity taking into account the price of fossil energies and the pollution resulting from her large exploitation. Solar radiation can be converted directly into electrical energy, in the form of direct current, by means of a solar cell. Finding the maximum power point is an essential part in photovoltaic systems. Indeed, the output power varies greatly depending on illumination, temperature, but also the overall aging of the system. In order to operate a PV generator as often as possible at its optimum power, we must introduce a controller and a static converter which will act as an adapter between the source and the load. Many works review the different maximum power methods to adjust the optimal output power and improve the efficiency of the PV system. These methods are broadly classified into several categories. In this paper, such an experimental regulator based on a power mathematical technique is proposed, which is founded on least squares method to estimate the maximum power when operating sub-optimally. This technique makes it possible to compare experimental data, generally tainted with measurement errors, with a mathematical model supposed to write these data. This study gives the opportunity to experimentally test a mathematical method with a PV system which mainly uses a BOOST chopper. The DC / DC converter and the regulator are designed and produced within the research unit while using an STM32F4 microcontroller over sun. The results obtained from the use of this optimization technique clearly show the very high fidelity between the real values of the current and voltage and their optimal estimated values with a certain uncertainty which does not exceed almost 2%, which shows a good agreement. In the same way, this approach makes it possible to minimize the oscillations around the MPP, which already makes it possible to improve the efficiency of the system which is very close to 100% in experimental tests.

Further Development of Boost Chopper for Power Conditioners - Pursuit of ideal PCS for photovoltaic power generations -

Further Development of Boost Chopper for Power Conditioners - Pursuit of ideal PCS for photovoltaic power generations -

Power control of 5-phase PMSG-diode rectifier-interleaved Boost set under health and fault modes

This paper deals with a fault tolerant marine energy conversion chain. The proposed structure minimizes active components and increases the phase number of generator. Hence, power control of 5-phase Permanent Magnet Synchronous Generator-diode rectifier set associated to 3-interleaved Boost converter is investigated. Dynamic small-signal models of Boost chopper are established. The control strategy is based on double loop control scheme: an inner control loop for DC current and an outer one for output power. The inner loop is guaranteed by an excellent analog current controller. Performances of this power control strategy are highlighted in both health and fault modes. The effects or disturbances caused by load variations or faults are well rejected.

Design and Simulation of Grid-Connected Rectifier and Boost Control Circuit for Micro-Turbine

本文对微型燃气轮机并网整流与升压控制回路进行了设计与仿真。整流部分(Rectifier system)选用电压型PWM整流器(VSR)，所搭建模型主要包括输入滤波电感(Reactor)、整流桥(Three-Level Bridge Rectifier)、整流控制器(Rectifier Controller)和直流滤波电容(C1, C2)。本次研究课题的斩波电路选用的是升压Boost斩波电路，将电压调节器用作外环控制，电流内环则根据id*、iq*的值来控制电流，从而实现对交流侧电流的快速调节作用。Boost Controller模块主要是通过产生合适的控制脉冲信号来控制可控开关Mosfet的通断，最终实现调节输出电压的目的。仿真结果表明本文设计的整流电路与升压控制回路输出电压波形稳定性优良。 In this paper, the design and simulation of the micro-turbine grid-connected rectification and boost control circuit are carried out. Rectifier system selected voltage-type PWM rectifier (VSR), the proposed model includes input filter inductors (Reactor), rectifier bridge (Three-Level Bridge Rectifier), rectifier controller and DC filter capacitor (C1, C2). The chopping circuit of this research topic is the step-up Boost chopper circuit, the voltage regulator for the outer ring control, and current inner ring can be based on id*, iq* value to control the current, in order to achieve the ra- pid adjustment of the AC side of the current role. Boost Controller module is mainly through the generation of appropriate control pulse signal, thus controlling the control switch Mosfet off, and ultimately achieving the purpose of adjusting the output voltage. The simulation results show that the design of the rectifier circuit and the boost control circuit output voltage waveform stability is excellent.

The Simulation Analysis for Increasing Output Power in Photovoltaic System byUsing Segmented String and Constant Voltage Boost Chopper with MPPT

The Simulation Analysis for Increasing Output Power in Photovoltaic System byUsing Segmented String and Constant Voltage Boost Chopper with MPPT

The Design and Implementation of Switching Power of High Power Factor in 3D Printer

According to harmonics pollution and low power factor problems of the traditional switching power, the design is a switching power of high power factor based on UCC28019 chip used on 3D printers. This design has the advantages of high power factor, high efficiency, low harmonics and low noise. Main circuit passes through EMI filtering, full-bridge rectifier and then filter, Boost chopper boost and correction of active power factor and closed-loop controlling, making the output voltage stable, small interfering and high over-all efficiency.

Study on Losses Calculation and Design of DC Boost Chopper

In view of the cooling of Insulated-gate bipolar transistors (IGBTs) in the parallel DC boost chopper, this paper presents a method to calculate the power loss of IGBTs. It involves functions of equivalent heat circuit of liquid cooling system based on the similarity theory, and the design of the parameters in the cooling system for DC boost chopper. It solves the problems of parameters designing of liquid-cooled heat sink. Taking the cooling system of IGBTs as an example, the experiment shows that the cooling system based on this method has excellent performances in the worksite, and the method is practical and effective.

Controller Design Using Ant Colony Algorithm for a Non-inverting Buck–Boost Chopper Based on a Detailed Average Model

In this article, the non-inverting buck–boost converter and its operation modes are scrutinized. The closed-loop stability of the converter in buck and boost modes is analyzed, and the necessity of using an appropriated controller is demonstrated. Then the application of an adapted ant colony optimization to design a feedback controller is proposed, and a controller based on its existing model is tuned. Simulation and experimental results obtained from the ant colony optimization designed controller are then compared with a controller designed with the classic method. Although the simulation and experimental results prove the efficiency of the proposed control approach, a significant difference between controller behavior in practice and simulation is obvious. Finding these differences, more detailed models, including all parasitic elements, in the buck and boost modes are derived. Applying the proposed model in controller design illustrates that the desired performance of the converter can be guaranteed with a simple proportional-integral (PI) controller. The suggested ant colony-based controller is again tuned based on the more detailed model, which improves the performance of the converter system even more. Furthermore, good agreement between analytical and experimental outputs validates the accuracy of the modeling and simulation.

Maximum Power Control with a Boost Chopper and Grid Connection of PMSG Based Wind Turbine

The paper focuses mainly on the maximum control method of boost chopper circuit based PMSG wind turbine. It includes a full bridge rectifier, boost chopper circuit, and a two-level voltage converter. Therefore, this PMSG system can directly connect with the gird; and the active power and reactive power can directly control by the grid voltage oriented vector control. The maximum power control method of the boost chopper based PMSG was studied to charge a constant resistance. In this study, the maximum power control is improved to apply in gird connection system.

A Novel Integrated Magnetic Core Structure Suitable for Transformer-Linked Interleaved Boost Chopper Circuit

A novel integrated magnetic structure suitable for a transformer-linked interleaved boost chopper circuit is proposed in this paper. Coupled inductors with high coupling are known to be effective for downsizing magnetic components. However, it is difficult to obtain the optional leakage inductance with high coupling for coupled inductors with EE or EI cores because of the fringing effect in the air gap. In order to overcome this problem, a novel integrated magnetic structure is first proposed. Then, a design method for the coupled inductor with the proposed magnetic structure is introduced on the basis of the magnetic circuit model. Finally, the effectiveness of the novel magnetic core structure is validated and discussed from an experimental viewpoint.

A Novel Cascaded Boost Chopper for the Wind Energy Conversion System Based on the Permanent Magnet Synchronous Generator

In the wind energy conversion system (WECS) based on the permanent magnet synchronous generator, the topology that a wind generator is connected to a voltage source inverter through a diode rectifier and a boost chopper is widely adopted for its low cost and high reliability. However, with the increasing power level of the WECS, the power switch device of a boost chopper in the topology has to endure high instantaneous voltage and current stress, thus reducing the system reliability. Although the traditional multiple boost converter reduces the transmission power level of single circuit units in terms of structure, it is still limited by narrow speed regulation range. Thus, a novel switchable-cascaded-mode boost chopper is proposed in this paper. The operation principle of the new converter and the generator speed control strategy are analyzed. At last, the effectiveness of the new converter is verified with an experimental prototype. The experimental results demonstrate that speed range is extended by using the new topology as generator-side converter in the permanent magnet wind generation system.

Comparison Between Phase Number and Operation Mode of Multiphase Boost Chopper for Reducing Input Current Ripple

Summary This paper describes the characteristics of a multiphase boost chopper on the basis of the difference between its phase number and operation mode. First, the paper presents a theoretical analysis of an input current ripple in a multiphase boost chopper controlled with CCM and DCM. For analyzing CCM, the input current ripple in an n-phase boost chopper is expressed by a general formula using a duty ratio. This expression clarifies integrally the relations between the phase number and input current ripple. The current ripple in CCM is much lower than that in DCM for the tested four-phase boost chopper. Furthermore, this paper presents a comparison between the converter efficiency and step response of a four-phase boost chopper controlled in CCM or DCM. The efficiency in CCM is higher than that in DCM by 0.5%. The phase number affects the step response characteristics in CCM. However, it does not affect the step response characteristics in DCM. © 2013 Wiley Periodicals, Inc. Electr Eng Jpn, 185(1): 57–66, 2013; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.22398

A Wiring Loss Reduction Method with Cross Current of Parallel Boost Choppers Utilizing the Carrier Phase Difference

In parallel boost converters, wiring loss occurs owing to the voltage difference between the converters. This paper proposes a wiring loss reduction method that employs CCM and DCM in a boost chopper. In particular, new approximation methods for the output voltage ripple of the DCM boost chopper are considered. Then, the carrier phase difference used to reduce the wiring loss is derived using the new approximation methods. Finally, the validity of the theory is confirmed by simulation and experimental results. The experimental results show that the wiring loss reduced to about 75% in the CCM and to about 65% in the DCM.

結合インダクタを用いた車載用昇圧チョッパ回路の特性解析と設計

結合インダクタを用いた車載用昇圧チョッパ回路の特性解析と設計

Simulation and Analysis of Two-Level Photovoltaic Grid-Connected System

As the power output of the photovoltaic (PV) cell changes with the insolation changing, PV cell temperature and cell voltage changing, it is necessary to control the operating voltage to draw the maximum power of the PV cell in order to increase system efficiency. Two-level three phase grid-connected PV system is designed. The forestage BOOST chopper adopt Incremental conductance algorithm to implement Maximum Power Point Tracking; The controller for the inverter system contains inner current loop and external voltage loop. According to the proposed control schemes, the phase and frequency of grid-connected current is the same as grid voltage, with the result of unity of the power, factor for power grid. The PV grid-connected system is built by MATLAB/SIMULINK, and the simulation results show that the proposed control schemes are validated.

Comparison between Phase Number and Operation Mode of Multiphase Boost Chopper for Reducing Input Current Ripple

Summary This paper describes the characteristics of a multiphase boost chopper on the basis of the difference between its phase number and operation mode. First, the paper presents a theoretical analysis of an input current ripple in a multiphase boost chopper controlled with CCM and DCM. For analyzing CCM, the input current ripple in an n-phase boost chopper is expressed by a general formula using a duty ratio. This expression clarifies integrally the relations between the phase number and input current ripple. The current ripple in CCM is much lower than that in DCM for the tested four-phase boost chopper. Furthermore, this paper presents a comparison between the converter efficiency and step response of a four-phase boost chopper controlled in CCM or DCM. The efficiency in CCM is higher than that in DCM by 0.5%. The phase number affects the step response characteristics in CCM. However, it does not affect the step response characteristics in DCM. © 2013 Wiley Periodicals, Inc. Electr Eng Jpn, 185(1): 57–66, 2013; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.22398

Modeling and Control of a Flexible Input Boost Chopper Linked to AC Drive System

In order to assure the inverter could operate either from rectifier utility power or battery packs to provide regulated sinusoidal power for ac motor, a boost chopper with flexible input voltages and constant output voltage usually used to offer the link dc voltage to ac drive system. In this paper, the objective is to propose a new control scheme to assure the boost chopper has good dynamic performance under the disturbance of input voltage and load. The mathematic model of the boost chopper based on PWM three-terminal switch device is discussed. The test results show that the proposed control system has robust performance with whether the disturbance of input voltage or loads.

Comparison Analysis of Boost Chopper with Various Snubber Circuits

Comparison Analysis of Boost Chopper with Various Snubber Circuits