• The Transactions of the Korean Institute of Electrical Engineers B
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• v.55 no.7
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• pp.353-361
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• 2006

This paper presents the design scheme of transformer for backlight inverter and discuss the characteristics related to its design, including driving inverter. A few studies have so far been made at design and characteristics analysis of transformer. Therefore, this paper manages the presentation of the advisable design methodology of transformer for backlight inverter supplying CCFL. To verify the proposed method, this paper accomplishes the analysis by FEM coupled with circuit and finally shows that the proposed design method is very useful.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.1 no.1
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• pp.79-84
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• 2008

Proposed EEFL inverter design method with Dimming control to use microprocessor. Reduce power loss using Energy Recovery method, and design inverter control program that use RS-232 communication. Also, low temperature driving time shortened 50% that use duty variable control.

• Journal of Power Electronics
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• v.9 no.4
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• pp.593-603
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• 2009

This paper proposes and describes the design and operational principles of a three-phase three-level nine switch voltage source inverter. The proposed topology consists of three bi-directional switches inserted between the source and the full-bridge power switches of the classical three-phase inverter. As a result, a three-level output voltage waveform and a significant suppression of load harmonics contents are obtained at the inverter output. The harmonics content of the proposed multilevel inverter can be reduced by half compared with two-level inverters. A Fourier analysis of the output waveform is performed and the design is optimized to obtain the minimum total harmonic distortion. The full-bridge power switches of the classical three-phase inverter operate at the line frequency of 50Hz, while the auxiliary circuit switches operate at twice the line frequency. To validate the proposed topology, both simulation and analysis have been performed. In addition, a prototype has been designed, implemented and tested. Selected simulation and experimental results have been provided.

• The Transactions of the Korean Institute of Electrical Engineers
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• v.39 no.7
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• pp.680-691
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• 1990

In this paper the conventional resonant inverters are compared and a novel parallel resonant dc pulse inverter for high performance motor drive system is proposed. The design method and related equations for the novel resonant inverter are derived. Also, a current controller for the resonant inverter is proposed and compared with PI current controller of the conventional PWM inverter by analog simulation. The novel resonant inverter and the current controller are implemented to verify the suggested design principles. The analog simulation and the experimental results shown the satisfactory operation of the proposed inverter and the controller.

• Journal of Electrical Engineering and Technology
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• v.13 no.1
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• pp.326-332
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• 2018

In this paper, the design process and the control method of the power conversion system (PCS) that consists of a bidirectional DC-DC converter and a 3-level T-type inverter for an energy storage system is presented. Especially the design method of the output LCL filter for a 3-lvel T-type inverter without complex mathematical process are proposed. The validity of the control method and design process in this paper are verified through simulation and experimental analysis.

• Journal of the Korean Institute of Telematics and Electronics
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• v.14 no.1
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• pp.23-28
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• 1977

This paper describes the practical design of a SCR inverter which is suposed to be very much suitable for high frequency induction heating power source. In this design an optimum control technique was applied to maintain constant output power and constant power factor to various heating load by the use of frequency control. Some appreciable characteristics was obtained for some design guide of large ndstrial heating power sources by the test of the 3KHz, 3KW inverter which was designed in this study.

• 한국태양에너지학회:학술대회논문집
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• 2009.11a
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• pp.371-376
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• 2009

The Power Conditioning System is Power Transfer System which make array DC current to the Grid sinusoidal current. These are Low Frequency Transformer Inverter Type, High Frequency Transformer Inverter Type and Transformer-less Type. Low Frequency Transformer Type has a Excellent Isolation property, but doesn't have competitiveness in Size and Cost. Also High Frequency Transformer Type has a good Isolation property but there are many steps in Power transfer Switching. Nowadays, Transformer-less Type inverter change a transformer to DC/DC Converter which is small and cost effective. In this paper shown the DC/DC Converter Transformer-less Type multi-string inverter design and simulation. The Control Algorithm will be introduced and Simulation was accomplished.

• Proceedings of the KIPE Conference
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• 2011.07a
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• pp.320-321
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• 2011

This paper proposes a practical design and development for CHBM inverter based on Power Electronics Building Blocks (PEBB). It is shown that the expansion and modularization characteristics of the CHBM inverter are improved since the individual inverter modules operate more independently, when using the PEBB concept. The proposed design and control methods are described in detail and the validity of the proposed system is verified experimentally in various industrial fields.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.2
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• pp.261-270
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• 2021

In this study, the design methodology of LCL filter for grid-connected three-phase inverter was studied. First, the advantages and disadvantages of applying typical filter structures as a filter for grid connection of a three-phase inverter were analyzed. Next, filter design methodologies for grid connection of a three-phase inverter were analyzed, and an effective filter design methodology was determined to satisfy the harmonic requirements in grid connection. In order to verify the effectiveness of the design methodology, EMTP models such as a three-phase inverter, a three-phase LCL filter, and a performance evaluation system to evaluate the performance of the designed filter were developed using EMTP-RV. Next, an LCL filter was designed for an application example of a three-phase inverter, and the waveforms of the output voltage and outage current of the three-phase inverter were checked through EMTP-RV simulation work. In particular, the validity of the design methodology was verified by confirming that the magnitude of the current ripple was reduced to a limited magnitude through waveform analysis of the output current.

• The Transactions of the Korean Institute of Power Electronics
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• v.5 no.2
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• pp.170-175
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• 2000

A new quasi-parallel resonant DC link inverter is proposed for three phase soft switching application. By i inserting only one additional switch, the proposed inverter excludes both voltage stresses and restricted PWM p problems, which are demerits of the conventional resonant inverter. In this paper, the circuit operations are e explained in detail using the operational mode analysis of the proposed inverter and design methods of the r resonant components are suggest('x:l. Lastly, the applicable possibility of the proposed inverter is vel예fied t through the experimental results.