scholarly journals Buck and Boost Inverter

2021 ◽  
Vol 9 (8) ◽  
pp. 942-947
Author(s):  
Dr. S. Ravi Chandran
Keyword(s):  
Power Supply ◽  
Integrated Circuit ◽  
Low Frequency ◽  
Buck Converter ◽  
Power Supply Unit ◽  
Switching Frequency ◽  
Power Semiconductor ◽  
Semiconductor Switches ◽  
Distributed Power Generation ◽  
Wide Range

Abstract: A versatile operation of any electronic circuitry depends on the power source supplying the power for its operation. The buck converter is implemented using an integrated circuit(IC), LM317. The constructed buck converter was tested for load and line regulation cited in the datasheets for stability. The test and analysis for the linear buck converter was done using setup. The output measurements indicate that the power supply is functional. The measured output values results of the test circuit. The developed output power supply unit is important in measurements, laboratories and test setup. It is implemented for all general applications that require power supply unit. XL6009 module is a DC to DC BUCK-BOOST converter module that operates at a switching frequency of 400kHz. In such high frequency, it provides smaller sized filter components compared with low frequency switching regulators. An improved SingleStage Buck-Boost inverter is provided, using only three or four power semiconductor switches. The inverter can handle a wide range of dc input voltages and produce a fixed ac output voltage. The inverter is well suited to distributed power generation systems such as photovoltaic and wind power and fuel cells, for standalone or grid connected applications. The inverter has a single charge loop, a positive discharge loop and a negative discharge loop. In this complete design of the converter is carried out. This application report gives details regarding this conversion with examples

A dimmable power supply unit for testing LED lamps built around a dedicated integrated circuit

2011 ◽  
Author(s):  
Frederic Mercier ◽  
Nori Hamza ◽  
Christophe Delcourt ◽  
Philippe Maugars ◽  
Stefan Bara ◽  
...  
Keyword(s):  
Power Supply ◽  
Integrated Circuit ◽  
Power Supply Unit

scholarly journals Method for improving ripple reduction during phase shedding in multiphase buck converters for SCADA systems

2021 ◽  
Vol 24 (1) ◽  
pp. 29
Author(s):  
Mini P. Varghese ◽  
A. Manjunatha ◽  
T. V. Snehaprabha
Keyword(s):  
Power Supply ◽  
Integrated Circuit ◽  
Buck Converter ◽  
Multiphase System ◽  
Processing Unit ◽  
Central Processing ◽  
Light Load ◽  
Field Programmable ◽  
Ripple Reduction ◽  
Application Specific Integrated Circuit

In the current digital environment, central processing unit (CPUs), field programmable gate array (FPGAs), application-specific integrated circuit (ASICs), as well as peripherals, are growing progressively complex. On motherboards in many areas of computing, from laptops and tablets to servers and Ethernet switches, multiphase phase buck regulators are seen to be more common nowadays, because of the higher power requirements. This study describes a four-stage buck converter with a phase shedding scheme that can be used to power processors in programmable logic controller (PLCs). The proposed power supply is designed to generate a regulated voltage with minimal ripple. Because of the suggested phase shedding method, this power supply also offers better light load efficiency. For this objective, a multiphase system with phase shedding is modeled in MATLAB SIMULINK, and the findings are validated.

A highly efficient GHz switching GaN-based synchronous buck converter module

2020 ◽  
Vol 12 (10) ◽  
pp. 945-953
Author(s):  
Andreas Wentzel ◽  
Oliver Hilt ◽  
Joachim Würfl ◽  
Wolfgang Heinrich
Keyword(s):  
Integrated Circuit ◽  
Buck Converter ◽  
Switching Frequency ◽  
Pulse Width Modulated ◽  
Power Added Efficiency ◽  
Highly Efficient ◽  
Low Pass ◽  
Power Amplifier Efficiency ◽  
Conversion Efficiencies ◽  
First Time

AbstractThe paper presents a highly efficient GaN-based synchronous buck converter suitable for switching in the lower GHz range. The module includes a very compact 2-stage GaN half-bridge converter MMIC (monolithic microwave integrated circuit) for low parasitic inductances between switches and drivers and a hybrid output network with core-less inductors to avoid ferrite losses. At 1 GHz switching frequency the buck converter achieves with pulse-width modulated (PWM) input signals power loop conversion efficiencies up to 78% for 40 V operation and output voltages up to 33 V. For 100 MHz the power loop efficiencies peak at 87.5% for 14.5 W conversion to 25 V. By changing the output network to a 2nd order low-pass with 700 MHz cut-off frequency the module has been characterized for the use as a supply modulator in very broadband envelope tracking systems with modulation bandwidths of up to 500 MHz. For 1 GHz switching frequency the power-added efficiency peaks at 74% for a 90% duty-cycle PWM input signal. The novelty of this work is that for the first time a buck converter design proves highest flexibility supporting different applications from very compact DC converters to microwave power amplifier efficiency enhancement techniques as well as efficient high frequency switching up to 1 GHz.

Failure Analyses of Modern Power Semiconductor Switching Devices

2015 ◽  
Vol 2015 (1) ◽  
pp. 000690-000695 ◽  
Author(s):  
Nathan Valentine ◽  
Diganta Das ◽  
Bhanu Sood ◽  
Michael Pecht
Keyword(s):  
Power Electronics ◽  
Field Effect Transistors ◽  
Short Circuit ◽  
Oxide Semiconductor ◽  
Manufacturing Defects ◽  
Power Semiconductor ◽  
Semiconductor Switches ◽  
Wide Range ◽  
Cause Of Failure ◽  
Switching Devices

Power semiconductor switches such as Power Metal Oxide Semiconductor Field Effect Transistors (MOSFETs) and Insulated Gate Bipolar Transistors (IGBTs) continue to be a leading cause of failure in power electronics systems. With the continued expansion of the power electronics market, reliable switching devices are of utmost importance in maintaining reliable operation of high power electronic systems. An overview of the failure mechanisms of power semiconductor switches identified by two failure analyses at CALCE is presented. The specific applications of power semiconducting switches have a wide range and include semiconductors found in converters for AC/DC power supplies and home appliance motor control board. All observed failures were from devices which experienced a short circuit between the collector and emitter terminals. The causes of the failures are hypothesized to be a combination of manufacturing defects and poor thermal management.

scholarly journals A Cost Effective Fault Diagnosis Technique for Cascaded H-Bridge Multilevel Inverter

2020 ◽  
Vol 9 (3) ◽  
pp. 196-199
Keyword(s):  
Cost Effective ◽  
Open Circuit ◽  
Multilevel Inverter ◽  
Power Semiconductor ◽  
Multilevel Inverters ◽  
Semiconductor Switches ◽  
Wide Range ◽  
Semiconductor Switch ◽  
Reliable Solution ◽  
Diagnosis Technique

Multilevel Inverters are universally accepted due to their wide range of applications and numerous advantages. In spite of this the reliability of the multilevel inverters are still questionable due to the repeatedly failures of power semiconductor switches. The industries need a cost effective and reliable solution of switch failures, which can be implemented without making major changes in the existing system. If the fault cannot be located within few seconds then fault may cause for multiple switch faults or malfunction of entire system. In this contrast, a cost effective solution to detect open circuit fault of a power semiconductor switch in five level cascaded H-Bridge multilevel inverter has been presented in this paper. The detection method is based on output pole voltage analysis of inverter. The principle of this technique can be implemented on existing system with little modifications. It requires only one voltage sensor per phase, which is already available with the main control system. The output of the multilevel inverter and fault detection results are validate through simulation results.

Filter Technology in the Switching Power Supply

2013 ◽  
Vol 787 ◽  
pp. 726-730 ◽  
Author(s):  
Zhi Hong Zhang ◽  
Bao Feng Zhang ◽  
Guang Quan Li
Keyword(s):  
Power Supply ◽  
Noise Pollution ◽  
Switching Frequency ◽  
Switching Power Supply ◽  
Switching Power ◽  
Three Phase ◽  
Wide Range ◽  
Switch Power Supply ◽  
Switch Power ◽  
Emi Filter

With the increase of switching frequency of power switch, EMI noise pollution becomes more and more serious. In order to solve this problem, in this paper, the switch power supply filter and passive EMI filter, active EMI filter is studied. It mainly research active EMI filter with feed forward , non-inductive current detection device of active EMI filter and active EMI filter for three-phase inverter motor. To solve this problem which is that EMI noise pollution has become more serious along with the increase of switching frequency switch power supply, the increasingly serious pollution make the EMI filter technology have a wide range of applications and put forward higher request to filter technology

Design of a High Power Programmable Intelligent Switch

2013 ◽  
Vol 389 ◽  
pp. 421-424
Author(s):  
Bai Fen Liu ◽  
Ying Gao
Keyword(s):  
Phase Shift ◽  
Power Supply ◽  
Single Phase ◽  
Low Frequency ◽  
Test System ◽  
High Quality ◽  
Dc Voltage ◽  
Ac Power ◽  
Wide Range ◽  
Testing Field

Based on the need to develop and test the products, a single phase DSP­based programmable AC power supply is designed. The power supply is capable of providing a stable AC voltage with adjustable amplitude and frequency over a wide range. Moreover, it can generate various high quality and low frequency arbitrary waveforms. Because of the advantages above, it will have great value in practice and a promising future in testing field. The main circuit of the power supply is to use rectifier and filter to make 220V AC voltage become steady DC voltage firstly. Then the inverter and the LC LPF are employed to produce the AC voltage which is required in the test system. The key part of the inverter is phase shift full bridge.

scholarly journals E-Type Asymmetric Multilevel Inverter Based Transformer less Traction Drive

2019 ◽  
Vol 8 (10) ◽  
pp. 2579-2589
Keyword(s):  
Output Voltage ◽  
Induction Motors ◽  
Multilevel Inverter ◽  
Switching Frequency ◽  
Switching Loss ◽  
Traction Drive ◽  
Power Semiconductor ◽  
Electric Drives ◽  
Semiconductor Switches ◽  
Three Phase

To overcome the limitations of conventional multilevel inverter such as of more no. of power semiconductor switches, large no. of capacitors, more switching loss etc. , a new topology of Envelope type (E-type) MLI is used. This E-type Module has some preferable features like reduced no. of components and low switching frequency. This E-type asymmetric converter uses four unequal DC sources and ten switches to generate 13 level of output voltage. SHE modulation technique is used to achieve high quality output voltage with low harmonic content. This E-type converter configuration will be used in transformer less traction drive. Nowadays Induction motors are used as electric drives for most of the electric railways. A transformer less connection is used for feeding Induction motor. This converter-inverter configuration will convert single phase AC voltage to DC and again this DC voltage will be converted into three phase AC. The output of the E-type Multi level inverter will be used to drive the Induction motors.

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