• Title/Summary/Keyword: Induction heating

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Electric Fan Heater Design for Eco-Energy Saving (친환경 에너지 절감형 전기온풍기 기구설계)

  • Sul, Yong-Tae
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.4
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    • pp.474-479
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    • 2016
  • As the Eco-energy is recently required, electrical energy is fast increased. Several induction heating methods are attractive for Eco-energy and energy saving. In this paper, electrical fan heater was designed and developed with new concept for energy saving by electromagnetic induction heating. Proposed system was composed of three module, blast part, induction heating part and power transformation part. Induction heating method was adapted for heating and the resonant inverter was used for increasing of the power transformation efficiency. Full-bridge resonant inverter was adopted to resonant inverter. This system was composed of induction heating part made with metal(SUS 40 series), and power transformation part made with rectifier module, filter module and resonant inverter. From these results, the proposed new electric heater could be saved the energy from faster increasing the temperature compared to commercial gas and other electric heater. This electrical fan heater is possible to be used in field of home, commercial and agricultural area for eco-energy saving heater.

Design and Analysis of Induction Heating Roll (유도가열 히팅롤의 설계와 해석)

  • Jang, S.M.;Yang, H.S.;Seo, J.H.;Lee, S.H.;Park, H.C.;Park, C.I.
    • Proceedings of the KIEE Conference
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    • 1998.07a
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    • pp.263-265
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    • 1998
  • This paper presents a design and Analysis of Induction Heating Roll. Heating roll is one of the induction heating's application, widespread for print, pulp, fiber industry, and so forth. In this paper, at first, treated that heating roll's characteristics equation, design method of heating roll, and then design roll. The second, analysis designed roll using FEM.

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Analysis of surface-hardening Induction heating (파열물의 표면 열처리를 위한 유도가열의 특성해석)

  • Jang, S.M.;Yoon, I.K.;Lee, S.H.;Ryu, D.W.;Choi, P.I.;Lee, H.J.
    • Proceedings of the KIEE Conference
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    • 2000.11b
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    • pp.287-289
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    • 2000
  • Induction heating is utilized in a large and ever-increasing number of application. The most prominent of these are billet heating heat treating, metals joining, and metal melting. In these day, heating roll, a kind of induction heating, is widely used in curing of coatings and fiber industry. In this paper, at first, treated that heating roll's characteristics equation. The second, analysis of magnetic flux and eddy currents distribution using FEM.

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Three Dimensional Analysis of Induction Heating Process using a Moving Coordinate (이동좌표계를 이용한 3차원 유도가열공정 해석)

  • Yun, Jin-Oh;Yang, Young-Soo;Shin, Hee-Yun
    • Journal of Welding and Joining
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    • v.25 no.1
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    • pp.24-29
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    • 2007
  • Finite element analysis for induction heating process including magnetic and thermal situations is presented. Because magnetic and thermal material properties vary with the temperature, material properties depending on temperature are considered. As the inductor moves, the solution domains corresponding to the inductor change into those of the air and the solution domains corresponding to the air change into those of the inductor. For these reasons, modeling of induction heating process is very difficult with a general purpose commercial programs. In this paper, three dimensional analysis of induction heating process for moving inductor is analyzed using moving coordinate. The skin effect is confirmed inside the steel plate in the electro-magnetic analysis. The distribution of heat generation at the initial state is different from that at the quasi-stationary state. Therefore, material properties depending on temperature must be considered. The calculated results of finite element analysis agree well with the experimental temperature results. This approach is suitable to solve magneto-thermal coupled problems.

THE PREVENTION OF THE LONGITUDINAL DEFORMATION DUE TO FILLET WELDING BY USING INDUCTION HEATING

  • Park, Jeong-Ung;Lee, Chin-Hyung;Chang, Kyong-Ho
    • Proceedings of the KWS Conference
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    • 2002.10a
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    • pp.816-825
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    • 2002
  • During the manufacture of a ship, longitudinal deformation is produced by fillet welding on the BuiltUp beam used to improve the longitudinal strength of a ship. This deformation needs a correcting process separate from a manufacture process and decreases productivity and quality. This deformation is caused by welding moment, which is the value multiplied the shrinking force due to welding by the distance from the neutral axis on a cross section of Built-Up beam. This deformation can be offset by generating a moment which is the same magnitude with and is located in an opposite direction to the welding moment on web plate by induction heating. Accordingly, this study clarifies the creation mechanism of the longitudinal deformation on Built-Up beam with FEM analysis and presents the preventative method of this deformation by induction heating basing the mechanism and verifies its validity through analysis and experiments. The induction heating used here is performed by deciding its location and quantity with experiments and simple equations and by applying them to areal structure.

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Design of Control System for All-Metal Domestic Induction Heating Considering Temperature and Quick-Response (워킹코일 온도 및 제어 속응성을 고려한 All-Metal Domestic Induction Heating 제어 시스템 설계)

  • Park, Sang-Min;Jang, Eun-Su;Joo, Dong-Myoung;Lee, Byoung-Kuk
    • The Transactions of the Korean Institute of Power Electronics
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    • v.23 no.3
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    • pp.199-207
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    • 2018
  • In this paper, an all-metal domestic induction heating (IH) system that can quickly identify ferromagnetic and non-ferromagnetic pots considering temperature changes in the working coil is designed. Load modeling is performed after analyzing the parameters of the pot material and the central misalignment of the working coil. To improve the performance and stability of the all-metal IH cooking heater, a power curve-fitting model is used to design a control system that quickly responds to load parameter fluctuations. In addition, a power control algorithm is established to compensate for the reference value by reflecting the increase in working coil temperature during heating of the non-ferromagnetic pot. The validity of the proposed control algorithm for the all-metal IH is verified by experiments using a 3.2 kW all-metal IH cooking heater.

A Study on the ZVS-SEPP Type High Frequency Resonant Inverter with induction Heating Jar(I) (IH-Jar용 ZVS-SEPP 고주파 공진 인버터에 관한 연구(I))

  • Kim, Jong-Hae;Kim, Dong-Hee;No, Chae-Gyan;Bae, Young-Ho;Baek, Seung-Myun;Moon, Chang-Soo
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.48 no.2
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    • pp.69-74
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    • 1999
  • This paper presents about a example of circuit design and characteristics of proposed circuit in the case of adopted the high frequency resonant Inverter of SEPP type using ZVS(Zero-Voltage-Switching) to the Induction heating load. The soft switching technology known as ZVS is used to reduce turn on and off loss at switching. Also, this paper realizes quantitative circuit analysis which has change the equivalent of Induction heating load to the electric circuit. According to the calculated characteristics value, a method of the circuit designs and operation characteristics of the Inverter is proposed. In addition, this paper proves the propriety of theoretical analysis through the experiment. The proposed inverter shows it can be practically used as power source system for induction heating Jar etc.

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Effects of Ball Milling on Sliding Wear Behavior of Ni-Al Intermetallics Coated on Mild Steel through Induction Heating Process (고주파 연소합성 코팅된 Ni-Al계 금속간화합물의 미끄럼 마모 특성에 미치는 볼 밀링의 영향)

  • Lee, Han-Young
    • Tribology and Lubricants
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    • v.34 no.6
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    • pp.284-291
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    • 2018
  • Ball-milling for reactant powders in advance and using an induction heating system for Ni-Al intermetallic coating process are known to enhance the reactivity of combustion synthesis. In this work, the effects of the charging weight ratio of ball to powder in ball-milling for reactant Ni-Al powders and the synthesizing temperature in induction heating on sliding wear behavior of the coating layers are investigated. Sliding wear behavior of the coating layers is examined against a tool steel using a pin-on-disc type sliding wear machine. As results, wear of the coating layer ball-milled without ball was severely worn out at the sliding speed of 2m/s, regardless of the synthesizing temperature in induction heating. However, the wear rate of the coating layers at the sliding speed was remarkably decreased with increasing the charging weight ratio of ball in ball-milling for reactant powders. This can be explained by the fact that the void in the coating layer is disappeared and the coating layer is densified by the ball-milling. The evidence showed that pitting damages were disappeared on the worn surface of ball-milled coating layer. Consequentially, the Ni-Al intermetallic coating layer could have better wear resistance at all sliding speed ranges with the ball-milling for reactant powders in advance.

A Study on the Concave Type Hull Plate Forming using Induction Heating System (고주파 유도가열을 이용한 오목 곡면 곡가공에 관한 연구)

  • Hyun, Chung Min;Kim, Dae Kyung;Mun, Seung Hwan;Park, Jung Seo;Dohr, Kyu Won
    • Journal of the Society of Naval Architects of Korea
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    • v.56 no.2
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    • pp.128-134
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    • 2019
  • In shipbuilding, accurate fabrication of curved hull plates is one of the most important steps, since the shape of ship hull, which is very critical in the overall performance of a ship, is a collection of such plates. The curved hull plates forming process requires a significant amount of time by skilled workers in shipbuilding. In general, the workers cause thermal distortion in the plate and forming initial shape using gas heat source. So shipbuilding companies need skilled workers who have long experience. To solve the problem, a lot of researchers tried to develop automation system for curved hull plates. In this paper, we propose automatic heating system with gantry robot, high frequency induction heater to replace the gas heat source and automatic measurement system. We apply the system to forming concave type plate that is actually used in ship manufacturing. In addition, a system was developed to automatically generate heating information, such as the heating location and the heating speed, for actual heating process. Then the system was applied to the actual heating material. It is shown that the proposed triangle heating pattern makes desired concave shape successfully. The induction heating system showed that it can be used for automation system of curved hull plates forming process replacing gas heat source.

An Output Control Research of an Induction Heating System Which Uses a 3-Level Inverter (3-레벨 인버터를 이용한 유도가열 시스템의 출력제어 연구)

  • Kim Sunh-Ho;Kwon Hyuk-Min;Shin Dae-Chul
    • Proceedings of the KIPE Conference
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    • 2004.07b
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    • pp.791-794
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    • 2004
  • This paper made an induction heating inverter. The inverter is the $20\~40[kHz]$ a resonant inverter which uses a high frequency. We use this inverter and use induction heating. A phasor shift ordered a gate signal to adjust an inverter's output. We verified an output waveform according to the situation of a gate signal through the simulation. We made the inverter really and got the result.

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