Impedance Analysis and Design of IPT System to Improve System Efficiency and Reduce Output Voltage or Current Fluctuations

2021 ◽  
pp. 1-1
Author(s):  
Jianwei Mai ◽  
Xianrui Zeng ◽  
Yousu Yao ◽  
Yijie GAE Wang ◽  
Dian Guo Xu
Keyword(s):  
Output Voltage ◽  
Impedance Analysis ◽  
Current Fluctuations ◽  
System Efficiency ◽  
Analysis And Design

scholarly journals Analysis and Design for Output Voltage Regulation in Constant-on-Time-Controlled Fly-Buck Converter

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1886
Author(s):  
Younghoon Cho ◽  
Paul Jang
Keyword(s):  
Output Voltage ◽  
Voltage Regulation ◽  
Design Guidelines ◽  
Buck Converter ◽  
Design Guideline ◽  
Analysis And Design ◽  
Flyback Converter ◽  
Auxiliary Power ◽  
Primary Output ◽  
Output Capacitor

Fly-buck converter is a multi-output converter with the structure of a synchronous buck converter structure on the primary side and a flyback converter structure on the secondary side, and can be utilized in various applications due to its many advantages. In terms of control, the primary side of the fly-buck converter has the same structure as a synchronous buck converter, allowing the constant-on-time (COT) control to be applied to the fly-buck converter. However, due to the inherent energy transfer principle, the primary-side output voltage regulation of COT controlled fly-buck converters may be poor, which can deteriorate the overall converter performance. Therefore, the primary output capacitor must be carefully designed to improve the voltage regulation characteristics. In this paper, a theoretical analysis of the output voltage regulation in COT controlled fly-buck converter is conducted, and based on this, a design guideline for the primary output capacitor considering the output voltage regulation is presented. The validity of the analysis and design guidelines was verified using a 5 W prototype of the COT controlled fly-buck converter for telecommunication auxiliary power supply.

scholarly journals Quadratic Boost Converter

2021 ◽  
Vol 9 (VII) ◽  
pp. 2010-2014
Author(s):  
Mamidala Hemanth Reddy
Keyword(s):  
Output Voltage ◽  
Semiconductor Device ◽  
Low Voltage ◽  
Input Voltage ◽  
Boost Converter ◽  
Voltage Gain ◽  
Practical Utilization ◽  
Analysis And Design ◽  
Simulink Model ◽  
Grid Connection

The output voltage from the sustainable energy like photovoltaic (PV) arrays and fuel cells will be at less amount of level. This must be boost considerably for practical utilization or grid connection. A conventional boost converter will provides low voltage gain while Quadratic boost converter (QBC) provides high voltage gain. QBC is able to regulate the output voltage and the choice of second inductor can give its current as positive and whereas for boost increases in the voltage will not able to regulate the output voltage. It has low semiconductor device voltage stress and switch usage factor is high. Analysis and design modeling of Quadratic boost converter is proposed in this paper. A power with 50 W is developed with 18 V input voltage and yield 70 V output voltage and the outcomes are approved through recreation utilizing MATLAB/SIMULINK MODEL.

scholarly journals Comparative Analysis and Design of the Shielding Techniques in WPT Systems for Charging EVs

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2115 ◽  
Author(s):  
Linlin Tan ◽  
Kamal Eldin Idris Elnail ◽  
Minghao Ju ◽  
Xueliang Huang
Keyword(s):  
Finite Element Method ◽  
Electric Vehicles ◽  
System Performance ◽  
Human Exposure ◽  
System Efficiency ◽  
Shielding Effectiveness ◽  
Wireless Power ◽  
Analysis And Design ◽  
Reactive Current ◽  
Simulation Results

Wireless power transfer (WPT) systems for charging Electric Vehicles (EVs) have gained extensive attention due to their many advantages. However, human exposure to electromagnetic fields (EMFs) has become a serious concern in high-power cases. In this paper, shielding techniques, including magnetic, metallic, and resonant reactive current shields, are investigated. Finite element method software is used to evaluate and compare the shielding effectiveness, charger weight, and system performance. The results show that the resonant reactive current shielding has a low EMF level with reasonable system efficiency and acceptable charger weight. In addition, 5 kW with 15 cm air gap WPT chargers were built to validate the simulation results.

scholarly journals Output Voltage Control of the SP topology IPT system based on Primary side Controller operating at ZVS

2017 ◽  
Vol 11 (1) ◽  
pp. 71-81
Author(s):  
Supapong Nutwong ◽  
Anawach Sangswang ◽  
Sumate Naetiladdanon ◽  
Ekkachai Mujjalinvimut
Keyword(s):  
Output Voltage ◽  
Coupling Model ◽  
Mutual Inductance ◽  
Switching Frequency ◽  
System Efficiency ◽  
Inductive Power Transfer ◽  
Zero Voltage Switching ◽  
The Cost ◽  
Zero Voltage ◽  
Voltage Switching

This paper presents a technique to control the output voltage of a series-parallel (SP) topology inductive power transfer (IPT) system using only a controller, located on the primary side. This reduces the cost, size, complexity and loss of the system compared to conventional IPT dual-side controllers. An asymmetrical duty cycle control (ADC) of full-bridge inverters was used to control the DC output voltage to its designed value. Additionally, a zero voltage switching (ZVS) operation can be obtained at all power levels by varying the switching frequency of the inverter. Theoretical analysis was performed through a mutual inductance coupling model and verified by computer simulation. Experimental results of the circular magnetic structure IPT system with an adjustable air-gap confirm the validity of the proposed controller. The system efficiency was improved throughout the operation and the improvement became obvious as the output power was decreased.

A Novel Four Switch Infinite Level Inverter

2020 ◽  
Vol 29 (12) ◽  
pp. 2050193 ◽  
Author(s):  
K. T. Ajmal ◽  
K. Muhammedali Shafeeque ◽  
B. Jayanand
Keyword(s):  
Steady State ◽  
Theoretical Analysis ◽  
Output Voltage ◽  
Duty Ratio ◽  
Switching Frequency ◽  
Voltage Level ◽  
Steady State Analysis ◽  
Analysis And Design ◽  
Multilevel Inverters ◽  
Very High

A novel Four Switch Infinite Level Inverter (FSILI) is proposed in this paper. In conventional multilevel inverters, as the number of levels increases the output voltage becomes more sinusoidal. Unlike conventional multilevel topologies, the output voltage level in the proposed topology depends upon the switching frequency. Since the switching frequency is very high, the output voltage level approaches infinity, thus the name Infinite Level Inverter. Proposed topology requires only one inductor and capacitor reducing the size, weight and thus cost of the overall system. Inherent buck operation is happening in the proposed topology with a sine varying duty ratio PWM control. Steady-state analysis and design of the inverter are carried out. The proposed topology is simulated using Matlab/Simulink to evaluate the theoretical analysis and operation. A hardware prototype is also developed to validate the operation of proposed FSILI.

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