scholarly journals Enhanced Active Filter for Single-Phase Controlled Rectifier Applications

2020 ◽  
Vol 10 (2) ◽  
pp. 143
Author(s):  
Jacob Dethan ◽  
Abidin Abidin ◽  
Benny Daniawan ◽  
Rino Rino
Keyword(s):  
Single Phase ◽  
Power Transmission ◽  
Harmonic Distortion ◽  
Active Filter ◽  
Active Filters ◽  
Oxide Semiconductor ◽  
Bipolar Junction Transistor ◽  
High Voltage Direct Current ◽  
Junction Transistor ◽  
Effect Transistor

Active filter can be used to increase the performance of single-phase controlled rectifier by reducing the generated ripple and harmonic distortion. Active filter can also increase power factor and efficiency of thyristor. In this work, active filter was designed by using NPN Bipolar Junction Transistor (BJT) compared with active filter created by utilizing NPN Metal Oxide Semiconductor Field Effect Transistor (MOSFET). The obtained efficiency of BJT based active filter with firing angles of 0° to 90° were 87.01% - 96.67%. Whereas, MOSFET based active filter produced comparable efficiency between 90.62% - 96.07%. It can be seen that MOSFET based active filter produced higher efficiency at firing angle of 0° which was 90.62% compared to BJT based active filter that has produced efficiency of 87.01% at the same firing angle.  Both active filters obtained similar power factors within the range of 0.57 lagging – 0.92 lagging. It is expected that this work can be useful for the design of active filters for various power electronics applications including the design of High Voltage Direct Current (HVDC) power transmission system.

Silicided P-N Junction Diodes Fabricated by Silicidation through Silicon Buffer Layer and Dopant Drive-Out Process

1993 ◽  
Vol 320 ◽  
Author(s):  
W. M. Chen ◽  
J. C. Lee ◽  
M.R. Frost
Keyword(s):  
Buffer Layer ◽  
Field Effect Transistor ◽  
Silicon Layer ◽  
Buffer Layers ◽  
Oxide Semiconductor ◽  
Boron Diffusion ◽  
Bipolar Junction Transistor ◽  
Junction Transistor ◽  
Effect Transistor ◽  
Polysilicon Emitter

ABSTRACTThis study investigates characteristics of p-n junction diodes fabricated by silicidation through a silicon buffer layer and dopant drive-out process. The purpose of using the buffer silicon layer is to reduce silicon consumption from the Si substrate during silicidation, and thus reduce the effective junction depth. The resulting structure is suitable for elevated CoSi2 source/drain contact in a metal-oxide-semiconductor field effect transistor or a silicided polysilicon emitter in a bipolar junction transistor. It was found that boron diffusion is enhanced by these buffer layers comparing to silicided diodes without silicon buffer layers. The sheet resistance of the CoSi2/polysilicon/Si structure does not degrade as seriously as CoSi2/polysilicon/oxide structure. The diode leakage current density is higher compared to diodes without buffer layers, especially when thinner buffer layers and high temperature 1000°C anneal are used.

scholarly journals A comparative analysis of cascaded-multilevel hybrid filters applied in power transmission systems

2008 ◽  
Vol 19 (1) ◽  
pp. 107-113 ◽  
Author(s):  
Alexandre G. Merçon ◽  
Lucas F. Encarnação ◽  
Luís F. C. Monteiro ◽  
Emanuel L. van Emmerik ◽  
Maurício Aredes
Keyword(s):  
Comparative Analysis ◽  
High Power ◽  
Power Transmission ◽  
High Harmonic ◽  
Active Filter ◽  
Active Filters ◽  
Transmission Systems ◽  
Passive Filters ◽  
Power Transmission Systems ◽  
Hybrid Filters

Passive filters, commonly used to attenuate non-characteristic harmonics in High Voltage Direct Current (HVDC) systems, stay at risk of disconnection from the system due to overcurrent problems. A possible solution to solve the problems involving high harmonic levels would be the use of pure active filters. However, this alternative is unpractical due to the high power of the transmission systems. This paper proposes two different topologies of hybrid filters to damp harmonic resonance in power transmission systems. The first one combines a small-rated active filter in series with passive filters, limiting overcurrents, when existent, or improving its own quality factor. The second one consists of an active filter in parallel with passive filters, which compensates all eventual overcurrent in the system bus. Both topologies utilizes the state of the art in very high power semiconductors and multilevel power converters. Simulation results present a comparative analysis, highlighting the efficiency of, and the differences between, the two proposed hybrid filters.

scholarly journals Desain Inverter Satu Fasa 12V DC ke 220V AC Menggunakan Rangkaian H-Bridge MOSFET

2019 ◽  
Vol 3 (1) ◽  
pp. 1-12
Author(s):  
Andhika Giyantara ◽  
Risky Susanto Tjiang ◽  
Subchan Subchan
Keyword(s):  
Single Phase ◽  
Bridge Circuit ◽  
Block Diagram ◽  
Oxide Semiconductor ◽  
Design Stage ◽  
Switching Speed ◽  
Electric Voltage ◽  
Fast Switching ◽  
Effect Transistor ◽  
Single Phase Inverter

Inverter is an electronic circuit that convert electric voltage with direct current (DC) to alternating current (AC). One of the commonly used inverter configuration is H-Bridge circuit. Inverter with H-Bridge circuit does not need voltage-balanced diode or capacitor to operate and can be cascaded to obtain multilevel output voltage. H-Bridge circuit works by adjusting the combination of switches that were enabled. One of the commonly used switches is Metal Oxide Semiconductor Field Effect Transistor (MOSFET). The advantages of MOSFET as switching components are its fast switching speed and it did not cause current tail. Therefore, the writing of this paper aims to design a 12V DC to 220V AC 50Hz single-phase inverter with H-Bridge MOSFET circuit. The design stage begins with determining the specifications of the inverter, creating a block diagram of the inverter, determining the required components, and calculating the required parameters of the inverter. The designed inverter is simulated using Proteus 8.4 software. Simulation results are in accordance with the desired specification.

Design of Active Filter Based on the Active Power Balance

2014 ◽  
Vol 596 ◽  
pp. 709-712
Author(s):  
Ling Ji
Keyword(s):  
Single Phase ◽  
Harmonic Distortion ◽  
Active Power ◽  
Active Filter ◽  
Simulation Software ◽  
Point Of View ◽  
Inductive Load ◽  
Harmonic Compensation ◽  
Shunt Active Filter ◽  
Functional Point

In order to eliminate harmonics generated by the power electronic devices, from a functional point of view the amount of the balance, the use of filters to supply current and DC voltage is sampled in a controlled manner to achieve harmonic compensation, the establishment of a single-phase active power filter the control system of the model and the theoretical analysis of the program by Saber simulation software has been validated in simulation, based on a prototype developed, according to the single-phase shunt active filter to achieve our scheme can effectively harmonic compensation for pollution caused by the rectifier with inductive load, simulation and experimental results show that this method can be controlled harmonic distortion at 5.8%.

scholarly journals Studi Analisis Pengaruh Filter Aktif Berbasis Fuzzy Logic Controller Untuk Mereduksi Harmonisa Akibat Beban Non Linier

2019 ◽  
Vol 6 (2) ◽  
pp. 24
Author(s):  
G. A. M. Dwi Ade Saputra ◽  
I Wayan Rinas ◽  
I Made Suartika
Keyword(s):  
Fuzzy Logic ◽  
Fuzzy Logic Controller ◽  
Negative Impact ◽  
Harmonic Distortion ◽  
Electrical Equipment ◽  
Sine Wave ◽  
Active Filter ◽  
Active Filters ◽  
Nonlinear Load ◽  
Simulation Results

Electrical equipment categorized as the nonlinear load will cause harmonics. Harmonic is a periodic distortion of the sine wave that can cause a negative impact on electronic equipment components. One way to improve power quality is to reduce harmonics using harmonic filters. In this study, an analysis of the system was carried out before adding a filter and after adding an active filter based on a fuzzy logic controller. The application of the fuzzy logic method on filters functions to reduce over switching in the inverter so that it can reach the lowest THDi value. THDi simulation results when the existing conditions are in phase R, S, T; at 14%, 17%, 14%. When the active filter condition is without control, the THDi percentage at the R phase is 6%, the S phase is 6%, the T phase is 4%. In the active filter conditions based on the fuzzy logic controller the percentage of THDi in phase R, S, T; is 0.9%, 0.9, 1%. Based on the simulation results introduced in the active filter based fuzzy logic controller is able to reduce harmonic distortion to the lowest value, so the use of fuzzy logic in active filters can be used in the harmonic filtering process in the electrical system.

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