scholarly journals Capacitor Clamped Coupled Inductor Bi-Directional DC-DC Converter with Smooth Starting

Machines ◽  
2022 ◽  
Vol 10 (1) ◽  
pp. 47
Author(s):  
Kalamchety Srinivasa Ravi Kumar ◽  
Alagappan Pandian ◽  
Vedula Venkata Sastry ◽  
Dogga Raveendhra
Keyword(s):  
Output Voltage ◽  
Input Current ◽  
High Voltage Gain ◽  
Steady State Operation ◽  
Parameter Variations ◽  
New Type ◽  
Voltage Transients ◽  
Simulation Results ◽  
And Control ◽  
Current Transients

In this paper, a new type of capacitor clamped coupled inductor bidirectional DC–DC converter is proposed, which offers high voltage gain with smooth starting current transients, as well as reduced stresses on the capacitor. Steady state operation, mathematical modelling, and state space modelling for the proposed converter are presented in detail. A simplified single voltage clamped circuit is developed to mitigate the voltage spikes caused due to the coupled inductor by recovering the leakage energy effectively. Moreover, the clamping capacitor helps in reducing the ripples in output voltage, which in effect significantly reduces the stress on the switch and offers less ripple content at the load terminals. Simulation of the proposed converter is carried out using Simulink/MATLAB for the conversion of 24V DC to 200V DC. For this conversion, simulation results have proven that there is reduction of 13.64% of capacitor voltage stresses. Further, under line varying conditions, converter responses have proven that there is a 119% and 25.25% reduction in input current and output voltage transients, respectively. Similarly, 25.25% and 76.5% transient reductions of input current are observed for line and control parameter variations. The hardware investigation of the converter was carried out with a 100 W, 24 V/200 V setup. The converter achieved efficiency of 93.8%. The observations supplement the simulation results.

scholarly journals A High Step-Up Partial Power Processing DC/DC T-Source Converter for UPS Application

2020 ◽  
Vol 12 (24) ◽  
pp. 10464
Author(s):  
Amirhossein Rajaei ◽  
Mahdi Shahparasti ◽  
Ali Nabinejad ◽  
Mehdi Savaghebi
Keyword(s):  
Output Voltage ◽  
Processing Technique ◽  
Power Converter ◽  
Voltage Gain ◽  
Uninterruptible Power Supply ◽  
High Voltage Gain ◽  
Steady State Operation ◽  
Full Power ◽  
Uninterruptible Power ◽  
Partial Power Processing

In this paper, a new modified structure of a DC/DC T-source converter is proposed. Since the proposed converter provides high voltage gain, it is suitable for photovoltaic integration into uninterruptible power supply (UPS) systems. The proposed structure employs partial power processing technique to increase the output voltage as well as efficiency without requiring new hardware. Partial power converters (PPCs) process only a fraction of flowing power while the remaining power directly flows through output. This generally causes an improvement in efficiency and output voltage. A total of two structures are presented: conventional partial power T-source converters and improved partial power T-source converters. The key advantage of the improved partial power converter is a higher voltage gain. Furthermore, it reduces the voltage and the current stresses on switches and diodes. The steady-state operation principles are described for both converters and the governed rules and equations are derived. The PPCs and full power converter are compared in terms of efficiency, voltage gain, voltage stress, and current stress of converter elements. The converter performance is evaluated through experimental and simulation studies. The presented results show good consistency with the theoretical analysis.

Operating Mode Simulation of the Micro HPP Hydro-Generator

2015 ◽  
Vol 770 ◽  
pp. 359-364
Author(s):  
Boris V. Lukutin ◽  
E.B. Sandarova ◽  
D.L. Matukhin ◽  
I.L. Fuks
Keyword(s):  
Output Voltage ◽  
Operating Mode ◽  
Hydro Power ◽  
Control Laws ◽  
Hydraulic Unit ◽  
Steady State Operation ◽  
Power Plant Control ◽  
Rfbr Grant ◽  
Equivalent Load ◽  
And Control

In the paper operating mode simulation of a hydro-generator with armature winding taps, running under standalone load with thyristor auto ballast stabilization system of magnitude and frequency of the output voltage of a hydraulic unit has been conducted. The created model enabled to investigate steady-state operation of the plant when connecting ballast load to various winding taps of the hydraulic generator subject to power change of the plant workload. Stabilization of the magnitude and phase of hydro-generator equivalent load as well as the distortion degree of output voltage for each stage of ballast have been evaluated. Ballast stage control algorithm and control laws of gate switching angles of ballast regulator have been proposed. Studies were undertaken within the scope of the RFBR grant entitled “Research and development of micro hydro power plant control systems for the power supply of standalone consumers”.

Analytical Model of 12-Pulse AC-DC Converter Based on Switch Function

2011 ◽  
Vol 143-144 ◽  
pp. 223-227
Author(s):  
Lei Gao ◽  
Wei Ming Tong ◽  
Fan Gang Meng
Keyword(s):  
Frequency Domain ◽  
Analytical Model ◽  
Power Factor ◽  
Output Voltage ◽  
Input Current ◽  
Frequency Domain Method ◽  
Input Line ◽  
Line Current ◽  
Domain Method ◽  
Simulation Results

This paper proposes a frequency domain method to analyze the harmonics components of input current and ripple coefficients of output voltage in 12-pulse diode rectifier system. Based on frequency domain linearity and analysis of commutation, the dc side output voltage and input line current are divided into two segments, and then expressions of the input current and output voltage are obtained. Some simulation results about THD, power factor and ripple coefficient are shown to validate the correctness of the proposed method

Passivity-Based Controller of Tri-State Boost Converter

2014 ◽  
Vol 571-572 ◽  
pp. 944-949 ◽  
Author(s):  
Qi Tang ◽  
Jiu He Wang ◽  
Jing Wei Hu
Keyword(s):  
Control Theory ◽  
Output Voltage ◽  
Boost Converter ◽  
Input Current ◽  
Simulation Results ◽  
Passivity Based Control ◽  
Set Up

A novel boost converter named tri-state boost converter is introduced in this paper. According to the operation principle of the tri-state boost converter, the Euler-Lagrange model is set up. Based on the passivity-based control theory and Euler-Lagrange model, a passivity-based controller of the tri-state boost converter is designed. By damping injecting, the input current and output voltage of the tri-state boost converter can reach the desired equilibrium values rapidly. The speed of the tri-state boost converter to reach the desired equilibrium values varies when the damping values changes. The controller is simple to design and makes the tri-state boost converter having better dynamic and steady performances. The passivity-based controller proposed in the paper is proved feasible by simulation results.

Modelling and Realisation of a Three-Level PWM Inverter Using a DSP Controller to Feed an Asynchronous Machine

2015 ◽  
pp. 687-718
Author(s):  
Denoun Hakim ◽  
Benyahia Nabil ◽  
Zaouia Mustapha ◽  
Benamrouche Nacereddine ◽  
Salah Haddad ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Output Voltage ◽  
Asynchronous Motor ◽  
Signal Spectrum ◽  
Pwm Inverter ◽  
Multilevel Inverters ◽  
Simulation Results ◽  
And Control ◽  
Dsp Controller ◽  
The Mathematical Model

Multilevel inverters have seen an increasing popularity in the last few years for medium- and high-voltage applications. The most popular has been the three-level neutral clamped inverter. Multilevel inverters synthesize output voltage from more than two voltage levels. Thus, the output signal spectrum is significantly improved in comparison with the classical two-level converters. This chapter discusses modelling and control of a Neutral Point Clamped (NPC) inverter which operates with the PWM switching pattern using a DSP. The mathematical model of the NPC inverter is carried out using conversion and connection functions for an easier understanding of the system operation. Simulation results using MATLAB program are reported, and it is shown that the performances obtained for driving an asynchronous motor using this inverter are very promising. Finally, analysis of the theoretical and the experimental results is carried out in order to validate the effectiveness of the proposed control solution.

scholarly journals Analysis of loss distribution of Conventional Boost, Z-source and Y-source Converters for wide power and voltage range

2017 ◽  
Vol 2 (1) ◽  
pp. 1 ◽  
Author(s):  
Brwene Salah Gadalla ◽  
Erik Schaltz ◽  
Yam Siwakoti ◽  
Frede Blaabjerg
Keyword(s):  
Output Voltage ◽  
Input Voltage ◽  
Industrial Applications ◽  
Point Of View ◽  
Small Range ◽  
Voltage Gain ◽  
Boost Converters ◽  
Voltage Range ◽  
High Voltage Gain ◽  
Simulation Results

Boost converters are needed in many applications which require the output voltage to be higher than the input voltage. Recently, boost type converters have been applied for industrial applications, and hence it has become an interesting topic of research. Many researchers proposed different impedance source converters with their unique advantages as having a high voltage gain in a small range of duty cycle ratio. However, the thermal behaviour of the semiconductor devices and passive elements in the impedance source converter is an important issue from a reliability point of view and it has not been investigated yet. Therefore, this paper presents a comparison between the conventional boost, the Z-source, and the Y-source converters based on a thermal evaluation of the semiconductors. In addition, the three topologies are also compared with respect to their efficiency. In this study the results show that the boost converter has higher efficiency than the Zsource and Y-source converter for these specific voltage gain of 2 and 4. The operational principle, mathematical derivations, simulation results and final comparisons are presented in this paper.

The Research of Output Voltage Error of Matrix Converter Decreased under Low Switch Frequency

2014 ◽  
Vol 971-973 ◽  
pp. 1194-1197
Author(s):  
Yi Hui Xia ◽  
Xiao Feng Zhang ◽  
Ming Zhong Qiao
Keyword(s):  
Theoretical Analysis ◽  
High Power ◽  
Output Voltage ◽  
Bipolar Transistors ◽  
Matrix Converter ◽  
Input Current ◽  
Insulated Gate Bipolar Transistors ◽  
Pulse Modulation ◽  
Average Value ◽  
Simulation Results

Its switch frequency can’?t be high because of the restrains of insulated gate bipolar transistors (IGBTS) when high power electrical motor driven by matrix converter. This paper mainly discuses about the reason for output voltage error with low switch frequency. And based on the reasons, a method for decreasing output voltage error is proposed, that is to say that referenced input current and output voltage is calculated by using their average value in one sample in the indirect space vector pulse modulation (ISVPWM) when switch frequency is low. Simulation results coincide with theoretical analysis, verifying that the proposed method is feasible and theoretical analysis is right.

Simulation and Implementation of Single Phase Boost – Buck Rectifier Using SPMC Topology with Reduced Input Current THD

2014 ◽  
Vol 592-594 ◽  
pp. 2199-2203
Author(s):  
Ajay Giri ◽  
Lalit Mohan Saini
Keyword(s):  
Output Voltage ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Matrix Converter ◽  
Input Current ◽  
Current Harmonics ◽  
Switching Algorithm ◽  
Converter Topology ◽  
Simulation Results ◽  
Boost Rectifier

Simulation of single phase buck boost rectifier with reduced input current THD using single phase matrix converter topology is describing in this paper. Due to the bidirectional feather the operation for buck-boost rectifier can be made through matrix converter topology. And this is possible by the proper switching algorithm to control the switches for their boost and buck operation. The input current nature is almost sinusoidal with low current total current harmonics and the level of THD is below than limit that was defined in the standards of IEEE. With the proper variation in modulation index corresponding changes in the output voltage is observed of buck-boost rectifier. For the synthesis of the output voltage Pulse width modulation (PWM) technique is used. The simulation results using MATLAB/Simulink are providing to validate the feasibility of this proposed method

scholarly journals A New Type of Super-Sparse Matrix Converter with Γ Source and Its Characteristics Analysis

2021 ◽  
Vol 2136 (1) ◽  
pp. 012028
Author(s):  
Shengqing Li ◽  
Shi Yan ◽  
Jian Zheng ◽  
Heng Zhang
Keyword(s):  
Output Voltage ◽  
Theoretical Foundation ◽  
Low Voltage ◽  
Sparse Matrix ◽  
Matrix Converter ◽  
Transfer Ratio ◽  
Simulink Simulation ◽  
Characteristics Analysis ◽  
New Type ◽  
Simulation Results

Abstract To solve the problem of low voltage transmission in ultra sparse matrix converter (USMC), a novel ultra sparse matrix converter (USMC) is proposed. The new USMC topology contains of a Γ source boost circuit in the DC link. By increasing the output voltage of DC link, the inverter stage can output higher voltage, thus widening the range of voltage transmission ratio. Furthermore, combined with the SVPWM modulation strategy, the voltage transfer ratio of the new USMC topology is derived, which lays a theoretical foundation for the application of USMC. Finally, Matlab / Simulink simulation results verify the correctness and feasibility of the topology.

Performance of 4G-LTE Communication and Navigation System in Blended Wing-Body UAS

2019 ◽  
Vol 8 (4) ◽  
pp. 9538-9542
Keyword(s):  
Satellite Communication ◽  
Line Of Sight ◽  
Multiple Factors ◽  
The World ◽  
New Type ◽  
Blended Wing Body ◽  
4G Lte ◽  
The Right ◽  
And Control ◽  
Technology Demonstrator

In vision of searching for the right Unmanned Aerial System (UAS) for a specific mission, there are multiple factors to be considered by the operator such as mission, endurance, type of payload and range of the telemetry and control. This research is focusing on extending control range of the UAS by using 4G-LTE network to enable beyond-line-of-sight flying for the commercial UAS. Major UAS such Global Hawk, Predator MQ-1 are able to fly thousands of kilometers by the use of satellite communication. However, the satellite communication annual license subscription can be very expensive. With this situation in mind, a new type of flight controller with 4G-LTE communication has been developed and tested. Throughout the research, blended-wing-body (BWB) Baseline B2S is used as the platform for technology demonstrator. Result from this analysis has proven that the proposed system is capable to control a UAS from as far as United Kingdom, with a latency less than 881 ms in average. The new added capability can potentially give the commercial UAS community a new horizon to be able to control their UAS from anywhere around the world with the availability of 4G-LTE connection

Sign in / Sign up

Export Citation Format

Share Document