scholarly journals Investigation of HID-lamp light emission differences for different power supply methods

2016 ◽  
Vol 64 (4) ◽  
pp. 915-923
Author(s):  
K. Tomczuk ◽  
P. Mazurek ◽  
L. Hemka ◽  
A. Kasprowicz ◽  
T. Błażejczyk
Keyword(s):  
Significant Influence ◽  
Power Supply ◽  
Light Emission ◽  
Plasma Channel ◽  
Plasma Temperature ◽  
Power Converter ◽  
Switching Frequency ◽  
Current Waveform ◽  
Plasma Parameters ◽  
High Switching Frequency

Abstract This paper presents investigation of methods for reducing light pulsation and plasma temperature inside a high intensity discharge (HID) lamp arc tube. Differences found in light emission of an arc tube plasma channel under different power supply methods are presented and discussed in this work. The novelty of the paper lies in systematical investigation of different power converter supply methods and demonstrating that it has a significant influence on plasma temperature in an arc tube. The tested lamp was powered by electronic ballasts controlled by different algorithms, which forced their current waveform. To compare the results, the authors performed measurements on a discharge lamp powered by a standard electromagnetic ballast. The investigation of plasma parameters is based on the optical spectroscopy method. It was shown that by using the appropriate current shape of a high switching frequency supply converter, the plasma temperature of an HID lamp can be reduced almost by half.

scholarly journals Dual Interleaved LLC Converter for High Power Applications and Wide Load Range

2019 ◽  
Vol 25 (3) ◽  
pp. 4-9
Author(s):  
Michal Frivaldsky ◽  
Jan Morgos ◽  
Andrej Kanovsky
Keyword(s):  
High Power ◽  
High Efficiency ◽  
Negative Impact ◽  
Power Converter ◽  
Switching Frequency ◽  
Resonant Converter ◽  
Load Range ◽  
High Switching Frequency ◽  
Llc Resonant Converter ◽  
Operational Range

Dual interleaved LLC resonant converter with half bridge topology of main circuit characterized by high switching frequency (500 kHz), high power density (60 W/inch3) and high efficiency (above 96 %) over entire operational range (20 %–100 %) is described. Focus was given on the practical design of power converter, which will be able to fulfil requirements on wide load range operation characterized by upcoming normative. Since proposed topology is based on dual interleaved LLC converter, the resonant component´s critical tolerance was also investigated to secure reliable and optimal operational point. Consequently, proposals for elimination of intolerance negative impact are also described. The results of theoretical analysis were verified directly through experimental measurements. Experimental results are finally compared with upcoming industrial standard 80 Plus Titanium.

Derating

2016 ◽  
pp. 373-407
Keyword(s):  
Electric Power ◽  
Power Supply ◽  
Life Time ◽  
Power Converter ◽  
Motor Drive ◽  
Switching Frequency ◽  
Normal System ◽  
Switching Power Supply ◽  
Switching Power ◽  
Motor Drive System

In previous chapters, we discussed the converter with or without fault. The common similarity between them is that they continue to operate without reduction of their nominal specification. In this chapter, uninterrupted operation of a faulty power conversion system with catastrophic damages in some of its parts is investigated. It is shown that a faulty electric power converter can continue to work with degraded specifications. This algorithm is named derating for accessibility. This technique can be used for both a faulty system because of its uninterrupted operation and a normal system because of extensive life time. Algorithms for derating of a faulty electric machine and a power supply are described. Derating for increasing the useful life of a motor drive system is presented. A novel method for switching frequency selection in a switching power supply is proposed based on derating concept. Derating is introduced as a technique to compensate additional losses in an electric power converter operating in harsh environment (for example: a motor drive which is supplied with a non sinusoidal voltage waveform). Industrial examples are presented in details for better understanding of the derating concept. Some of the presented examples contain novel idea for derating and others are well known in industry.

scholarly journals MODELING AND SIMULATION OF LOW VOLTAGE POWER SUPPLY FOR ACTIVE PHASED ARRAY RADAR

2013 ◽  
pp. 198-203
Author(s):  
C.S VIDYALAKSHMI ◽  
CHANNABASAPPA BALIGAR
Keyword(s):  
Modeling And Simulation ◽  
Power Supply ◽  
Phased Array ◽  
High Efficiency ◽  
Low Voltage ◽  
Switching Frequency ◽  
Loop Control ◽  
Mode Control ◽  
Phased Array Radar ◽  
High Switching Frequency

This paper deals with the modeling and simulation of low voltage power supply (LVPS) unit to the ACTIVE PHASED ARRAY RADAR, which is used for sensing different targets at a time. This RADAR system contains flat bank of small identical antennas and huge number of transmitting and receiving modules for electronic scanning. This radar antenna requires power in different levels for various electronic devices. The proposed design of LV power supply will have the ability to manage temperature variations with high efficiency under different loading condition. The closed loop control such as voltage mode control and current mode control are used to regulate the output voltage with high switching frequency of 400khz has been designed. Simulations are performed using MATLAB / SIMULINK software.

scholarly journals Efficient FPSoC Prototyping of FCS-MPC for Three-Phase Voltage Source Inverters

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1074 ◽  
Author(s):  
Eduardo Zafra ◽  
Sergio Vazquez ◽  
Hipolito Guzman Miranda ◽  
Juan A. Sanchez ◽  
Abraham Marquez ◽  
...  
Keyword(s):  
Digital Signal Processor ◽  
Computation Time ◽  
Digital Signal ◽  
Power Converter ◽  
Voltage Source ◽  
Switching Frequency ◽  
Digital Controllers ◽  
Voltage Source Inverters ◽  
High Switching Frequency ◽  
Three Phase

This work describes an efficient implementation in terms of computation time and resource usage in a Field-Programmable System-On-Chip (FPSoC) of a Finite Control Set Model Predictive Control (FCS-MPC) algorithm. As an example, the FCS-MPC implementation is used for the current reference tracking of a two-level three-phase power converter. The proposed solution is an enabler for using both complex control algorithms and digital controllers for high switching frequency semiconductor technologies. An original HW/SW (hardware and software) system architecture for an FPSoC is designed to take advantage of a modern operating system, while removing time uncertainty in real-time software tasks, and exploiting dedicated FPGA fabric for the most complex computations. In addition, two different architectures for the FPGA-implemented functionality are proposed and compared in order to study the area-speed trade-off. Experimental results show the feasibility of the proposed implementation, which achieves a speed hundreds of times faster than the conventional Digital Signal Processor (DSP)-based control platform.

scholarly journals Design of LQR controller for GaN based Buck converter

2020 ◽  
Vol 15 (2) ◽  
pp. 37-48
Author(s):  
Miklos Csizmadia ◽  
Miklos Kuczmann
Keyword(s):  
State Feedback ◽  
Design Procedure ◽  
Linear Quadratic Regulator ◽  
Power Converter ◽  
Buck Converter ◽  
Switching Frequency ◽  
Linear Quadratic ◽  
Calculating Method ◽  
High Switching Frequency ◽  
Lqr Controller

Abstract:This paper presents a design procedure of a switched-mode power converter, the well-known synchronous buck converter: the calculating method, and how to choose the parts of the converter are presented in detail, like the inductor, the capacitor and the semiconductors as well as the design of the state feedback. During the design process the efficiency and the high switching frequency are very important: the switching semiconductors are Gallium Nitride based. Then, a linear-quadratic regulator is designed and applied to the particular case of a buck converter.

scholarly journals Mitigation of Common Mode Voltage Issues in Electric Vehicle Drive Systems by Means of an Alternative AC-Decoupling Power Converter Topology

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3349 ◽  
Author(s):  
Endika Robles ◽  
Markel Fernandez ◽  
Edorta Ibarra ◽  
Jon Andreu ◽  
Iñigo Kortabarria
Keyword(s):  
Power Converters ◽  
Power Converter ◽  
Life Cycles ◽  
Propulsion System ◽  
Mitigation Strategies ◽  
Switching Frequency ◽  
Common Mode ◽  
Common Mode Voltage ◽  
High Switching Frequency ◽  
Three Phase

Electric vehicles (EV) are gaining popularity due to current environmental concerns. The electric drive, which is constituted by a power converter and an electric machine, is one of the main elements of the EV. Such machines suffer from common mode voltage (CMV) effects. The CMV introduces leakage currents through the bearings, leading to premature failures and reducing the propulsion system life cycles. As future EV power converters will rely on wide bandgap semiconductors with high switching frequency operation, CMV problems will become more prevalent, making the research on CMV mitigation strategies more relevant. A variety of CMV reduction methods can be found in the scientific literature, such as the inclusion of dedicated filters and the implementation of specific modulation techniques. However, alternative power converter topologies can also be introduced for CMV mitigation. The majority of such power converters for CMV mitigation are single-phase topologies intended for photovoltaic applications; thus, solutions in the form of three-phase topologies that could be applied to EVs are very limited. Considering all these, this paper proposes alternative three-phase topologies that could be exploited in EV applications. Their performance is compared with other existing proposals, providing a clear picture of the available alternatives, emphasizing their merits and drawbacks. From this comprehensive study, the benefits of a novel AC-decoupling topology is demonstrated. Moreover, an adequate modulation technique is also investigated in order to exploit the benefits of this topology while considering a trade-off between CMV mitigation, efficiency, and total harmonic distortion (THD). In order to extend the results of the study close to the real application, the performance of the proposed AC-decoupling topology is simulated using a complete and accurate EV model (including vehicle dynamics and a detailed propulsion system model) by means of state-of-the-art digital real-time simulation.

scholarly journals Hybrid Multimodule DC-DC Converters for Ultrafast Electric Vehicle Chargers

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4949
Author(s):  
Mena ElMenshawy ◽  
Ahmed Massoud
Keyword(s):  
Power Density ◽  
High Power ◽  
High Efficiency ◽  
Controller Design ◽  
Power Level ◽  
Power Converter ◽  
Total Power ◽  
Switching Frequency ◽  
High Power Density ◽  
High Switching Frequency

To increase the adoption of electric vehicles (EVs), significant efforts in terms of reducing the charging time are required. Consequently, ultrafast charging (UFC) stations require extensive investigation, particularly considering their higher power level requirements. Accordingly, this paper introduces a hybrid multimodule DC-DC converter-based dual-active bridge (DAB) topology for EV-UFC to achieve high-efficiency and high-power density. The hybrid concept is achieved through employing two different groups of multimodule converters. The first is designed to be in charge of a high fraction of the total required power, operating at a relatively low switching frequency, while the second is designed for a small fraction of the total power, operating at a relatively high switching frequency. To support the power converter controller design, a generalized small-signal model for the hybrid converter is studied. Also, cross feedback output current sharing (CFOCS) control for the hybrid input-series output-parallel (ISOP) converters is examined to ensure uniform power-sharing and ensure the desired fraction of power handled by each multimodule group. The control scheme for a hybrid eight-module ISOP converter of 200 kW is investigated using a reflex charging scheme. The power loss analysis of the hybrid converter is provided and compared to conventional multimodule DC-DC converters. It has been shown that the presented converter can achieve both high efficiency (99.6%) and high power density (10.3 kW/L), compromising between the two other conventional converters. Simulation results are provided using the MatLab/Simulink software to elucidate the presented concept considering parameter mismatches.

scholarly journals Nonlinear Dynamics and Performance Analysis of a Buck Converter with Hysteresis Control

Computation ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 112
Author(s):  
Carlos Hoyos Velasco ◽  
Fredy Hoyos ◽  
John Candelo-Becerra
Keyword(s):  
State Space Model ◽  
Power Converter ◽  
Buck Converter ◽  
Switching Frequency ◽  
Load Variations ◽  
General Terms ◽  
Experimental Implementation ◽  
High Switching Frequency ◽  
And Performance ◽  
Hysteresis Control

This paper presents the mathematical modeling and experimental implementation of a Buck converter with hysteresis control. The system is described using a state-space model. Theoretical and simulation studies show that the zero hysteresis control leads to an equilibrium point with the implication of an infinite commutation frequency, while the use of a constant hysteresis band induces a limit cycle with a finite switching frequency. There exists a tradeoff between voltage output ripple and transistor switching frequency. An experimental prototype for the Buck power converter is built, and theoretical results are verified experimentally. In general terms, the Buck converter with the hysteresis control shows a robust control with respect to load variations, with undesired high switching frequency taking place for a very narrow hysteresis band, which is solved by tuning the hysteresis band properly.

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