scholarly journals Modeling and Analysis of N-Branch Hybrid Switched Inductor and Capacitor Converter

Electronics ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 891
Author(s):  
Lei Yang ◽  
Li Ma ◽  
Xiaojie Li ◽  
Liansong Xiong ◽  
Xinghua Liu ◽  
...  
Keyword(s):  
Phase Shift ◽  
Output Voltage ◽  
Control Method ◽  
Autonomous Underwater Vehicles ◽  
Current Source ◽  
Soft Switching ◽  
Voltage Source ◽  
Cycle Period ◽  
Resonant Condition ◽  
Multi Level

This paper proposes a family of N-Branch hybrid switched inductor and capacitor (SLC) converters. With the single circuit, the multi-level output voltage or current could be generated. The proposed converter is suitable both for the voltage source and the current source. The same LC network is reused for different LC branches. The proposed converter is controlled by the phase shift control method with a time domain multiplexing concept. The N level circuit is operated with the same frequency. One cycle period is divided into N small time cycles for each branch. The phase shift for each branch is . The load voltage could be changed by modifying the duty cycle of the transistor. When the SLCs work in the resonant condition, the soft switching will be acquired. The power loss of transistors could be sharply reduced. In this paper, a 300 W SLC converter is constructed to verify the theoretical analysis and operation mechanism in the resonant condition and hard switching condition. With the experimental and simulated verification, the soft switching and the stable multi-level output voltage or current are achieved. The proposed SLC converter could be used for the multi-level voltage power supply system, such as the electric vehicle, the electric aircraft, autonomous underwater vehicles (AUVs) and a new energy generation system.

scholarly journals A comparative study of cascade H-bridge multilevel voltage source inverter and parallel inductor multilevel current source inverter

2019 ◽  
Vol 10 (3) ◽  
pp. 1355
Author(s):  
Nik Fasdi Nik Ismail ◽  
Norazlan Hashim ◽  
Dalina Johari
Keyword(s):  
Output Voltage ◽  
Current Source ◽  
Harmonic Distortion ◽  
Voltage Source ◽  
Voltage Source Inverter ◽  
Analysis Study ◽  
Multilevel Inverters ◽  
Advantages And Disadvantages ◽  
Current Source Inverter ◽  
Current Source Inverters

This paper presents the analysis study between multilevel inverters that are often classified into multilevel voltage source and multilevel current source inverters.  For multilevel voltage source inverter (MVSI), the specific topology studied for this work is the Cascaded H-Bridge MVSI.  Whereas, the multilevel current source inverter (MCSI) is based on Paralleled Inductor Configuration MCSI.  For this study, the analysis between these converters are done with respect to the number of components, the advantages and disadvantages of each converters during performing inverter operation. In term of output voltage and current quality, the percentage of the Total Harmonic Distortion (THD) are measured and compared for both topologies.  MATLAB/Simulink software has been used in this research to design and simulate in order to study the performances of both inverters.

A new digital control method for a voltage source inverter to compensate for imbalance of output voltage

2012 ◽  
Vol 41 (8) ◽  
pp. 879-888 ◽  
Author(s):  
Jian-Min Wang ◽  
Po-Jung Tseng ◽  
Shang-Chin Yen ◽  
Pang-Jung Liu ◽  
Huang-Jen Chiu
Keyword(s):  
Digital Control ◽  
Output Voltage ◽  
Control Method ◽  
Voltage Source ◽  
Voltage Source Inverter

scholarly journals A New Soft-Switching Solution in Three-Level Neutral-Point-Clamped Voltage Source Inverters

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2247
Author(s):  
Zbigniew Szular ◽  
Bartosz Rozegnal ◽  
Witold Mazgaj
Keyword(s):  
Control System ◽  
Control Algorithm ◽  
Control Method ◽  
Neutral Point ◽  
Soft Switching ◽  
Voltage Source ◽  
Voltage Source Inverters ◽  
Switching Losses ◽  
Switching Method ◽  
Selection Of

This paper presents a new soft-switching solution recommended for three-level neutral-point-clamped inverters. The operation principles of the proposed solution, working stages, selection of elements, and the control algorithm are comprehensively discussed herein. The control method of the inverter main switches is the same as that of the switches of an inverter operating according to the hard-switching technique. The correctness of the proposed solution was confirmed by the results of different tests using a laboratory neutral-point-clamped inverter with rated parameters of 3 kW, 2 × 150 V, 12 A, and 3 kHz. Numerical analyses were performed for the inverter of rated power 1.2 MW. The switching losses of the inverter operating with the proposed solution were compared with those of an inverter with hard-switching method. The proposed soft-switching solution increased the inverter efficiency and its competitiveness in relation to other proposals because there were no connections between switches and capacitors or inductors, which pose a risk of damaging the inverter when disturbances in the control system appear.

LQR Based Control Method for Grid Connected and Islanded DG System

2018 ◽  
Vol 19 (5) ◽  
Author(s):  
Parusharamulu Buduma ◽  
Gayadhar Panda
Keyword(s):  
State Feedback ◽  
Reactive Power ◽  
Control Method ◽  
Current Source ◽  
Superior Performance ◽  
Voltage Source ◽  
Optimization Approach ◽  
Control Scheme ◽  
And Performance ◽  
Comparative Results

AbstractThis paper presents an output and state feedback robust LQR (OSRLQR ) optimal controller for the control of active (P) and reactive power (Q) in grid-connected mode, and voltage (V) and active power in islanded mode of photovoltaic (PV) distributed generation (DG) system. The OSRLQR scheme is comprising of an output and state feedback controllers, which are designed based on LMI-LQR optimization approach. The DG inverter along with proposed controller is configured to work as a current source in grid-connected mode and a voltage source in island mode using P-Q and P-V control scheme respectively. A seamless transition between the grid connected and island modes under the presence of the proposed controller is achieved using a passive island detection and synchronization algorithm along with load shedding. The entire control scheme of the DG system is modelled and analyzed using MATLAB/SIMULINK/Robust Tool-Box, and the practical feasibility of the proposed control scheme is verified using dSPACE. A superior trade-off robustness among the stability and performance is the final outcome of the DG system with proposed control scheme. Performance of the proposed control scheme is compared with conventional PI controller and the comparative results indicate the superior performance of proposed control scheme over the conventional control scheme.

scholarly journals Current Sharing Control of an Interleaved Three-Phase Series-Resonant Converter with Phase Shift Modulation

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2470
Author(s):  
Jing-Yuan Lin ◽  
Kuan-Hung Chen ◽  
Pin-Hsian Liu ◽  
Hsuan-Yu Yueh ◽  
Yi-Feng Lin
Keyword(s):  
Phase Shift ◽  
High Power ◽  
Output Voltage ◽  
Control Method ◽  
Total Output ◽  
Analysis And Design ◽  
Current Sharing ◽  
Three Phase ◽  
Series Resonant ◽  
Power Switches

Recently, three-phase series-resonant converters (SRCs) have been proposed for high power applications. Three-phase SRCs can achieve zero-voltage-switching (ZVS) of the primary power switches and regulate the output voltage by pulse-frequency modulation. The interleaving technique is also a conventional method for DC-DC converters to achieve a high power level, reducing the output voltage ripples due to operating out of phase at the same frequency between the two converters. However, an interleaved three-phase SRC cannot easily synchronize switching instants between the two modules due to the component tolerances of circuits. In the proposed control method, phase shift modulation (PSM) is used to solve the output current imbalance caused by component tolerances. The power switches of the converter can also maintain synchronizing switching instants between the two modules. Therefore, the lower output voltage ripple can be achieved. A detailed analysis and design of this new control method for interleaved three-phase SRCs are described. Finally, prototype converters with a 2.4 kW total output were built and successfully tested to verify the feasibility of the current sharing modulation.

scholarly journals PV Based Asymmetrical Cascade Three Phase Nine Level Multi Level Inverter Fed Induction Motor

2019 ◽  
Vol 8 (6) ◽  
pp. 1709-1712
Keyword(s):  
Induction Motor ◽  
Output Voltage ◽  
Circuit Complexity ◽  
Modulation Method ◽  
Voltage Source ◽  
Circuit Performance ◽  
Switching Device ◽  
Three Phase ◽  
Driver Circuit ◽  
Multi Level

Motor performance and life is decreased due to presence of harmonic in the output voltage. Many inverter topologies were proposed for industrial drives application. PV based three phase asymmetrical cascade nine level inverter fed induction motor is proposed in this article. The proposed circuit has one dc source derived from PV with MPPT and nine level inverter with reduced components. The PV output voltage is regulated with help of boost converter using MPPT algorithm. The proposed inverter has unequal voltage source 1:2:4 ratios. The fundamental frequency modulation method is used for control the inverter output voltage. The proposed multi level inverter has less switching device and diode compare than other multilevel inverter topology. The circuit is modified further by replacing switching device with diode in the source section for reducing switching count; as a result, the control algorithm and driver circuit complexity are reduced further. The circuit performance is verified with help of simulation results

Hardware Implementation of Cascaded Hybrid Multilevel Inverter with Reduced Number of Switches

2016 ◽  
Vol 3 (2) ◽  
pp. 314
Author(s):  
Chinnapettai Ramalingam Balamurugan ◽  
S.P. Natarajan ◽  
T.S. Anandhi ◽  
R. Bensaraj
Keyword(s):  
Phase Shift ◽  
Pulse Width ◽  
Output Voltage ◽  
Degrees Of Freedom ◽  
Hardware Implementation ◽  
Pulse Width Modulation ◽  
Multilevel Inverter ◽  
Variable Frequency ◽  
Multi Level ◽  
Simulation Results

<p class="JESTECAbstract">This paper presents the comparison of various multicarrier Pulse Width Modulation (PWM) techniques for the Cascaded Hybrid Multi Level Inverter (CHBMLI). Due to switch combination redundancies, there are certain degrees of freedom to generate the five level AC output voltage. This paper presents the use of Control Freedom Degree (CFD) combination. The effectiveness of the PWM strategies developed using CFD are demonstrated by simulation and experimentation.  The simulation results indicate that the chosen five level inverter triggered by the developed Phase Disposition(PD), Phase Opposition and Disposition(POD), Alternate Phase Opposition and Disposition (APOD), Carrier Overlapping (CO), Phase Shift (PS) and Variable Frequency (VF)<strong> </strong>PWM strategies developed are implemented in real time using FPGA. The simulation and experimental outputs closely match with each other validating the strategies presented.</p>

A Novel Design of Soft Switching Based on Three-Phase Current Source Inverter

2013 ◽  
Vol 433-435 ◽  
pp. 1218-1225
Author(s):  
Zhong Hong Shen ◽  
Lin Yang ◽  
Qun Xing Liu ◽  
Wen Li Zhu ◽  
Chun Xu Jiang ◽  
...  
Keyword(s):  
Control Method ◽  
High Reliability ◽  
Current Source ◽  
Soft Switching ◽  
Switching Topology ◽  
Switching Circuit ◽  
Phase Current ◽  
Current Source Inverter ◽  
Three Phase ◽  
Pass Through

This paper presents a novel soft switching topology and its control method applied on three-phase current source inverter. The main switch transistors of the inverter can be achieved in soft switching on the current pass-through step, which can reduce switch stress and improve efficiency. The soft switching circuit consists of two auxiliary switch transistors and some passive devices, such as inductor, capacitor and diode. It has many advantages as follows, simple control, fewer devices, high reliability, and so on. This paper analyzes the principle of soft switching circuit, and simulate by using the current space vector control method with MATLAB. The simulation results demonstrate the feasibility of the method.

scholarly journals Conductance-controlled global-compensation-type shunt active power filter

2015 ◽  
Vol 64 (2) ◽  
pp. 259-275 ◽  
Author(s):  
Andrzej Szromba
Keyword(s):  
Control Method ◽  
Current Source ◽  
Active Power Filter ◽  
Active Power ◽  
Active Filter ◽  
Active Filters ◽  
Voltage Source ◽  
Shunt Active Power Filter ◽  
Dc System ◽  
Power Filter

Abstract This paper presents a load equivalent conductance based control method for a shunt active power filter. The principle of energy balance in the circuit, which means between supplying source - active filter - load, is used to obtain the control formula. The natural inertia of the active filter action is exploited, so no PI regulators are needed. The active filter can compensate for non-active current and, additionally, can stabilise the supplying source active power. In a case of generating loads energy harvesting is possible. The presented method is useful as well for voltage-source as current-source inverter based active filters, and for DC system as well as for AC single- or three-phase one.

scholarly journals Power applications for fuel-cell using switching regulators

2019 ◽  
Vol 15 (1) ◽  
pp. 71
Author(s):  
Dega Rajaji Vanka ◽  
K. Chandra Sekhar
Keyword(s):  
Fuel Cell ◽  
Output Voltage ◽  
Closed Loop ◽  
Control Method ◽  
Voltage Regulation ◽  
Boost Converter ◽  
System Stability ◽  
Voltage Source ◽  
Energy Unit ◽  
Fuel Cell Stack

<p><strong> </strong></p>Generally the switch mode power supply input voltage source is constant or shows insignificant little varieties.in any case, when fuel call used input source the last assumption is not valid. A fuel cell stack is give a details of low and not controlled DC output voltage, moreover, when the demanded current increases the output voltage becomes low in a nonlinear form; from now on, suitable controller is required to taken the previously mentioned issues. In this article, a normal current-mode controller is planned to using a joined model for an energy unit stack and a boost converter; besides, the resolving control method increasing the system stability and output voltage regulation.. The proposed energy system utilizes an energy component power (polymer electrolyte film fuel cell) and a boost converter passing on power of 900 W. the proposed controller execution for output voltage regulation by means of closed loop gain estimations and step load changes. What's more, a correlation amongst open-and closed- loop estimations is made, where the controller robustness is tried for vast load varieties and fuel cell stack output voltage changes are shows on simulation results.

Sign in / Sign up

Export Citation Format

Share Document