scholarly journals Theoretical Analysis of a Three-Phase Bidirectional Isolated DC-DC Converter Using Phase-Shifted Modulation

2018 ◽  
Vol 9 (2) ◽  
pp. 495 ◽  
Author(s):  
Zhong Yih Tan ◽  
Nadia Mei Lin Tan ◽  
Ida Suzana Hussain
Keyword(s):  
High Frequency ◽  
Power Flow ◽  
Lag Phase ◽  
Dc Voltage ◽  
Operating Modes ◽  
Three Phase ◽  
Phase Shift Angle ◽  
High Frequency Ac ◽  
Bidirectional Power Flow ◽  
Shift Angle

<span lang="EN-US">A three-phase bidirectional isolated dc-dc converter consists of two six-pulse two-level active converters that enable bidirectional power flow by introducing a lag phase-shift angle of one converter with respect to the other converter. This paper explains the operating modes of a three-phase bidirectional isolated dc-dc converter in detail, taking into account the transfer of energy between the dc voltage sources and high-frequency ac inductances in the three-phase bidirectional isolated dc-dc converter. The power flow of the dc-dc converter is also examined based on the operating modes.</span>

scholarly journals Modeling and Control of a Multifunctional Three-Phase Converter for Bidirectional Power Flow in Plug-In Electric Vehicles

Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2591
Author(s):  
Reza Sabzehgar ◽  
Yaser M. Roshan ◽  
Poria Fajri
Keyword(s):  
Electric Vehicles ◽  
Power Flow ◽  
Sliding Mode ◽  
Nonlinear Controller ◽  
Modeling And Control ◽  
Vehicle To Grid ◽  
Operating Modes ◽  
Three Phase ◽  
Phase Converter ◽  
Bidirectional Power Flow

A nonlinear sliding-mode controller for a three-phase converter, utilized in plug-in electric vehicles (PEVs), is proposed in this paper. The proposed controller enables the utilized converter to perform multiple functions during different operating modes of the vehicle, i.e., grid-to-vehicle (G2V) and vehicle-to-grid (V2G) modes. The bidirectional three-phase converter and the proposed controller operate as a power factor correction circuit, bridgeless boost converter, and rectifier during G2V mode (i.e., plug-in charging), and it operates as a conventional single-stage inverter during V2G mode. The stability analysis of the proposed controller is performed by defining a proper Lyapunov function. The functionality of the proposed nonlinear controller is first evaluated through simulation studies. The feasibility and effectiveness of the proposed control strategy is then validated using an industrial control card through a hardware-in-the-loop (HIL) experimental testbed.

Resonant BLDC Motor Drive System for Medical Applications

2019 ◽  
Vol 14 ◽  
Author(s):  
C. Vidhya ◽  
V. Ravikumar ◽  
S. Muralidha
Keyword(s):  
High Frequency ◽  
Pulse Width Modulation ◽  
Power Converter ◽  
Low Power Consumption ◽  
Motor Drive ◽  
Medical Applications ◽  
Bldc Motor ◽  
Three Phase ◽  
High Frequency Ac ◽  
Motor Drive System

: The objective of this paper is to implement an ac link universal power converter controlled BLDC motor for medical applications. The ac link universal power converter is a soft switched high frequency ac link converter, created using the parallel combination of an inductor and a capacitor. The parallel ac link converter handle the ac voltages and currents with low reactive ratings at the link and offers improved power factor, low power consumption, more efficiency and less weight on comparison with the traditional dc link converter. Because of the high throughput, BLDC motors are preferred widely medical applications. A modulation technique called Space Vector Pulse Width Modulation (SVPWM) is used to generate the three phase power for the BLDC motors from the input DC supply. To validate the proposed system, simulations are performed in MATLAB – Simulink and an experimental prototype is constructed to supplement the simulation results.

Study and Implementation of Partial Resonant High-Frequency AC-Link Inverter Operating in Soft-Switching Condition

2021 ◽  
pp. 2150238
Author(s):  
Abdelkarim Aouiti ◽  
Hajer Marzougui ◽  
Faouzi Bacha
Keyword(s):  
High Frequency ◽  
Power Flow ◽  
Power Converter ◽  
Soft Switching ◽  
Correct Operation ◽  
Fundamental Properties ◽  
Dc Power ◽  
Dspace 1104 ◽  
Converter Topology ◽  
High Frequency Ac

In this paper, a high-frequency AC-link DC–AC converter is presented with detailed analysis. This converter is used as an interface between a dc power source and a grid. The studied converter is a universal power converter which consists of two bridges separated by an AC-link; each bridge is connected to a source or it feeds a load. The link of this converter contains a parallel pair inductance-capacitor. The inductance is used to stock/supply energy and for the link capacitor, it allows to perform soft switching during turning on/turning off of the switches. The studied converter has considerable advantages compared to the other topologies. Its fundamental properties are, especially, the compactness, reliability and efficiency which it ensures. Also, it guarantees longer lifetime and the possibility to transfer power in the two power flow directions. In this talk, the principles of the ac-link inverter operation are clearly explained in this paper. Simulation results, under MATLAB/SIMULINK, are shown to validate the correct operation and the efficiency of the proposed converter topology. The control algorithm is, also, experimentally implemented using a dSPACE 1104 control board.

scholarly journals Modelling of a Two-Stage Bidirectional AC-DC Converter using Wavelet Modulation

2018 ◽  
Vol 9 (3) ◽  
pp. 1006
Author(s):  
H.K. Chiu ◽  
Agileswari K. Ramasamy ◽  
Nadia M.L. Tan ◽  
Matthew Y.W. Teow
Keyword(s):  
Power Flow ◽  
High Efficiency ◽  
Harmonic Distortion ◽  
Two Stage ◽  
Bidirectional Converter ◽  
Three Phase ◽  
Dc Component ◽  
And Performance ◽  
Bidirectional Power Flow ◽  
Ev Charging

<span lang="EN-US">In this paper, a Wavelet modulated isolated two-stage three-phase bidirectional AC-DC converter is proposed for electric vehicle (EV) charging systems. Half-bridge resonant CLLC converter is proposed due to its high efficiency, wide gain range, galvanic isolation and bidirectional power flow. Wavelet modulation technique is used for three-phase six leg AC-DC converter due to its benefits of high DC component and lower harmonic contents. The proposed two-stage converter is developed and simulated in MATLAB Simulink environment. The contribution of this paper is on the implementation and performance analysis of Wavelet modulation in bidirectional AC-DC converters. The results show that Wavelet modulation is suitable to be implemented for the proposed bidirectional converter. The performance of the proposed converter delivers very low output voltage ripple and total harmonic distortion output current of less than 10% which is within the expected results.</span>

scholarly journals Operation analysis of high-frequency AC link three-phase DC-AC converter applying phase-shift PWM control in secondary side

1999 ◽  
Vol 119 (5) ◽  
pp. 659-669 ◽  
Author(s):  
Masakazu Michihira ◽  
Takayuki Ota ◽  
Minwon Park ◽  
Tsuyoshi Funaki ◽  
Zen-Ichiro Kawasaki ◽  
...  
Keyword(s):  
Phase Shift ◽  
High Frequency ◽  
Pwm Control ◽  
Operation Analysis ◽  
Three Phase ◽  
High Frequency Ac ◽  
Secondary Side

scholarly journals Integrated methodology to calculate nonsinusoidal AC systems of high frequency

Vestnik IGEU ◽  
2021 ◽  
pp. 40-54
Author(s):  
A.V. Gusenkov ◽  
A.A. Dyachkov ◽  
V.D. Lebedev ◽  
A.M. Sokolov ◽  
T.E. Shadrikov
Keyword(s):  
Power Supply ◽  
High Frequency ◽  
Research Work ◽  
Internal Resistance ◽  
Analytical Technique ◽  
Operating Modes ◽  
Electrical Systems ◽  
Ac Systems ◽  
Cable Lines ◽  
High Frequency Ac

During the research and development of fundamentally new AC systems of high frequency, the authors identified the problems of the calculations and modeling of the operating modes of such systems according to the method of Yu.M. Osipova. Application of the method gives results that are significantly different from the experimental ones. The aim of the study is to improve the methodology considering the features of high-frequency electrical systems, their topology, and components. The research has been carried out based on a mathematical model of an electrical system of high frequency, which includes a power supply, matching transformers, cable lines and a load. The power supply is modeled in a simplified form with the internal resistance of the transistors. An analytical technique for calculating and modeling high-frequency AC systems has been developed. Analytical expressions are presented to calculate the characteristics and parameters of the high frequency system components. Recommendations on automation of the developed technique using MATLAB, Python or Simulink are presented.Comparison of the results of calculation and the experiment is carried out to confirm the reliability. The results of the research work can be used for modeling and calculating high frequency alternating current systems to determine the current load, voltage levels, analyze overvoltages and emergency modes.

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