5[kW]급 풀-브릿지 고주파 공진형 인버터를 이용한 고효율 유도가열 히터 개발

신대철,권혁민 전력전자학회 2005 전력전자학회 논문지 Vol.10 No.5

Proposed induction-heated system is innovative system which applied special high-frequency power circuit technique for thermal converse technique and IH(Induction-Heating) magnetic induction heating generated from induction-heated metallic package that is for distillation unit. In this occurs not burning, so that the working environment can be improved. This electromagnetic induction heating technique is used high frequency inverter. By using high frequency inverter high frequency alternative current in the range of [kHz] can be made with conventional alternative current. In this contribution IGBT module is used for high frequency inverter. This paper proposes new fluid heating method. Which is operated as follows. Working coil, which is wrapped outside of pipeline, makes the eddy current. Inside of heating vessel in isolated pipeline the specially designed stainless metallic package is inserted, which can be heated by eddy current losses. And then In this paper are discussed action analysis and characteristics analysis of 5[kW] class full-bridge resonant inverter system and resonant metallic package. In addition, by using this system, how high-efficiency heater is developed and application of system are also discussed. 제안한 유도가열 시스템은 증류탑 장치에 사용되는 특수충진체에 의한 열교환기술과 IH(Induction-Heating)전자유도가열용의 특수한 고주파 전력회로 기술을 응용한 차세대 가열방식이다. 특히 일체의 연소과정이 없다는 점에서 작업환경의 개선이 가능하며 본 기술은 IGBT대응의 고주파 인버터를 사용하여 상용교류로부터 수[kHz]의 고주파교류를 발생시킬 수 있다. 본 논문에서는 절연체 용기 내에 특수 스텐레스 발열체부하를 수납하여 용기 외부의 고주파 공진형 인버터 접속의 워킹코일로부터 비접촉 상태로 전자유도 와전류를 구조체에 흘림으로서 발열하게 되는 새로운 유체가열방식을 제안한다. 그리고 5[kW]급 풀-브릿지 공진형 인버터 시스템과 공진부하의 동작해석, 특성분석 및 본 시스템을 이용한 고효율 스팀 발생장치의 개발과 시스템의 응용에 대해 논하였다.

친환경 에너지 절감형 전기온풍기 기구설계

설용태(Sul Yong-Tae) 한국산학기술학회 2016 한국산학기술학회논문지 Vol.17 No.4

친환경에너지에 대한 요구가 높아지면서 전기에너지의 사용은 계속 증가하고 있다. 최근 친환경, 에너지 절약을 위해서 유도가열을 이용한 여러 가지 가열방식에 대한 관심이 높아지고 있다. 본 논문에서는 전자유도현상을 이용한 유도가 열방식을 이용하여 보다 친환경적이고 에너지 절약이 가능한 전기온풍기를 설게 제작하였다. 온풍기는 송풍부, 유도가열부 및 전력변환부 등 3부분으로 구성하였다. 유도가열부는 송풍부에 결합되어 송풍부로부터 발생된 바람이 가열되어 분출되며, 전력변환부는 고주파를 인가하여 자속을 발생시킴으로써 유도가열부의 내부를 가열시킨다. 발열방식은 유도가열의 원리를 적용하고, 전력변환효율성을 높이기 위해 공진형 인버터를 사용하였다. 공진형 인버터는 풀브리지 전압형 직렬부하 공진형 인버터를 사용하였다. 유도가열부는 세라믹 계열의 절연체와 SUS40계열의 금속체를 사용했으며, 전력변환부는 정류부, 필터 부 및 공진형 인버터부 등으로 구성 하였다. 본 연구에서 제안한 전기온풍기는 기존의 전기히터와 가스히터 등과 비교한 결과, 온도 상승속도가 빠르고, 사용에너지 비용이 절감되는 등 경제성도 있음을 보였다. 개발된 전기온풍기는 가정용, 상업 용 및 농업용 등 여러 분야에 친환경 에너지절감형 온풍기로의 적용 가능성이 있다. 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.

고효율 유도가열형 전기온풍기에 관한 연구

신대철(Dae-Chul Shin),우형균(Hyoung-Gyun Woo) 한국조명·전기설비학회 2012 조명·전기설비학회논문지 Vol.26 No.3

A proposed the electrical fan heater using induction heating is innovative system which applied IH(Induction Heating) magnetic induction heating generated from induction-heated metallic package and high-frequency power circuit technique for thermal converse technique. In this occurs not burning, so that the working environment and deterioration of products can be improved. The existing heater that low efficiency by heated resistance or using fossil fuel of coal, diesel, kerosene has problems about burden for high cost price. In this paper are compared efficiency the existing heaters and designed electrical fan heaters using 3[㎾]-Class full-bridge resonant inverter. In addition, action analysis and application of system are discussed.

Performance Evaluation of Battery Thermal Management System in Electric Vehicle Using Induction Heater (Part 1: Parallel System)

Waseem Raza,Gwang Soo Ko,박윤철 대한설비공학회 2020 International Journal Of Air-Conditioning and Refr Vol.28 No.1

The fast evolving Electric vehicles (EVs) have become popular due to their zero-emission, fuel economy and better technology. However, the performance and life of batteries are very sensitive to temperature, it is important to maintain the proper temperature range. The battery thermal management system (BTMS) plays an important role in the performance of EVs. In this context, this study is conducted to evaluate the thermal performance of a battery with a parallel system using an induction heater. The GT-Suite software is used for simulation and evaluation. Mixture of water and ethylene glycol 50:50 is used as a working fluid and controlled by pump and valves. The heating rate of battery was analyzed by changing the capacity of induction heater 2, 4 and 6 kW and the flow rate of fluid was 2, 3, 5, 7, 10 and 27 LPM. The simulation work predicts that the battery heating rate increases with the increase in fluid flow. The study concluded that the battery heating rate is maximum with a flow rate of 27 LPM which is the highest amount of LPM, indicating that the rise in flow rate causes the increase in heating rate of the system which is also affected by induction heater capacity.

와전류 발열장치를 응용한 모터 구동형 히터 개발

채용웅(Yong-Yoong Chai),윤광열(Kwang-Yeol Yoon) 한국전자통신학회 2019 한국전자통신학회 논문지 Vol.14 No.5

본 연구에서는 와전류를 생성하는 모터를 제어하여 구동하는 히터를 설계하였다. 모터는 와전류 히터의 회전체를 구동하는데, 자기장은 와전류 히터의 회전체와 고정체 사이의 공기간극에서 주어지며, 고정체에 대한 회전체의 운동은 와전류를 발생시키며 이것이 결국 열을 발생시키게 된다. 본 연구에서는 이 장치의 효율에 영향을 주는 요소들의 분석을 위해 8개와 16개의 자석으로 구성된 회전판을 이용하였다. 그 결과 자기장의 자극은 모터의 속도와 회전체를 구성하는 자석의 개수에 의해 영향을 받는다는 것을 알 수 있었다. This paper descries the operation of a heater which was designed to control a motor that generates an eddy current. As the motor drives the rotor of an eddy current heater, magnetic fields are provided within the air gap between an eddy current heater’s rotor and stator. Throughout the research, a rotor composed of 8 and 16 pieces of magnets was used to analyze which are the factors that affect the efficiency of this equipment. Test results showed that the magnetic fields are influenced by variable functions including the velocity of a motor and the quantity of magnets composing a rotor.

A combined Dual Hot-Gas Bypass Defrosting method with accumulator heater for an air-to-air heat pump in cold region

Kim, Jaehong,Choi, Hwan-Jong,Kim, Kyung Chun Elsevier 2015 APPLIED ENERGY Vol.147 No.-

<P><B>Abstract</B></P> <P>The Dual Hot-Gas Bypass Defrosting (DHBD) cycle is an effective defrosting method compared to a Reverse Cycle Defrosting (RCD) method to remove frost from the outdoor heat exchanger (HEX) of an air-to-air heat pump, especially the outdoor temperature is above 0°C. However, the DHBD method has a drawback when the heat pump operates in cold outdoor environment, below 0°C due to rapid decrease in refrigerant temperature followed by lower hot-gas bypass temperature. In order to overcome lower discharge temperature of compressor, a combined defrosting cycle with DHBD and the accumulator heating method is developed. An induction heater (IH) is adopted as the accumulator heater. The dynamic performance and defrosting time are compared between the conventional RCD method and the combined DHBD–IH method using a medium size air-to-air heat pump of 16kW under the condition of −5°C outdoor temperature. Due to the additional heater, the combined DHBD–IH method sustained higher discharge temperature of the compressor and reduced 15% of the defrosting time than that of the RCD method with nonstop indoor heating operation. The overall heating capacity of the DHBD–IH cycle including defrosting mode was 2.5kW higher than that of the RCD cycle.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A novel defrosting cycle for heat pump operating in cold region is proposed. </LI> <LI> A combined defrosting cycle with DHBD and the accumulator heating method is developed. </LI> <LI> An induction heater (IH) is adopted as the accumulator heater. </LI> <LI> The combined DHBD–IH method sustained higher discharge temperature of the compressor. </LI> <LI> The combined method reduced 15% of the defrosting time than that of the RCD method. </LI> </UL> </P>

듀얼 모드 위상 시프트 ZVS PWM 제어 고주파 공진형 인버터를 이용한 IH 온수기

정상석,유의정(Yeoi-Joung Ryu),우경일(Kyung-Il Woo),박한석(Han-Seok Park),Sang-Wook Lee 대한전기학회 2018 전기학회논문지 P Vol.67 No.2

This paper presents a novel prototype of dual mode control based phase shift ZVS PWM high frequency load resonant inverter with lossless snubber capacitors in addition to a single active auxiliary resonant snubber for electromagnetic induction heating(IH) foam metal based consumer fluid dual packs(DPA) heater. The operating principle in steady state and unique features of this voltage source soft switching high frequency inverter circuit topology are described in this paper. The lossless snubber and auxiliary active resonant snubber assisted constant frequency phase shift ZVS PWM high frequency load resonant inverter employing IGBT power modules actually is capable of achieving zero voltage soft commutation over a widely specified power regulation range from full power to low power. The steady state operating performances of this dual mode phase shift PWM series load resonant high frequency inverter are evaluated and discussed on the basis of simulation and experimental results for induction heated foam metal heater which is designed for compact and high efficient moving fluid heating appliance in the consumer pipeline systems.

전기자동차용 판형 인덕션 히터의 인덕턴스 및 철손 최적설계 연구

강준규(Jun-Kyu Kang),조병욱(Byoung-Wook Jo),김기찬(Ki-Chan Kim) 한국콘텐츠학회 2018 한국콘텐츠학회논문지 Vol.18 No.10

전기자동차 배터리 시스템은 낮은 온도에서 배터리 출력과 수명이 감소하는 문제가 발생한다. 상온 유지를 목적으로 Positive Temperature Coefficient(PTC) 히터가 사용되고 있다. 하지만 PTC 히터는 복잡한 절연구조로 인해 중량이 크다. 중량이 클수록 전기자동차의 연비가 감소한다. 반면에 인덕션 히터는 단순한 절연 구조로 중량 저감에 효과적이며 빠른 온도 상승 특성을 가지고 있다. 따라서 전기자동차용 히터는 인덕션 히터가 적합하다. 인덕션 히터는 LC공진 회로로 구성된다. 정전용량이 클수록 가격과 중량이 상승하기 때문에 인덕턴스를 높여 정전용량을 감소시켜야한다. 또한 인덕션 히터의 주 발열원은 철손이다. 따라서 전자기장 설계 관점에서 인덕턴스 및 철손의 최적화가 중요하다. 본 논문에서는 인덕션 히터 구조 변경에 따른 인덕턴스 및 철손을 다구찌 기법과 유한요소법(FEM) 시뮬레이션을 통해 분석하고 최적화 설계하였다. The battery system of an electric vehicle suffers from the problem the battery output and the service life decrease at low temperature. A Positive Temperature Coefficient(PTC) heater is used for maintaining room temperature but is heavy due to a complicated insulation structure. The larger the weight is, the lower the fuel economy of the electric vehicle is. On the other hand a induction heater have a simple insulation structure, which is effective in weight reduction and has a rapid temperature rise. The induction heater consists of an LC resonance circuit. The larger the capacitance is, the higher the price and weight is. Therefore, the inductance should be increased to reduce the capacitance. Also, the main heat source of the induction heater is coreloss. So, it is important to optimize inductance and coreloss in terms of electromagnetic field design. In this paper, the inductance and the coreloss according to the change of the induction heater structure were optimized through the Taguchi method and Finite Element Method(FEM) simulation.

전기 자동차용 유도 가열기 철손 최적화 연구

신희성,노홍래,김철민,김기찬 국제차세대융합기술학회 2021 차세대융합기술학회논문지 Vol.5 No.4

전기자동차는 배터리로부터 전력을 공급받아 구동하는 시스템으로, 저온상태에서는 배터리의 수명이 저하 된다. 따라서 전기자동차는 배터리와 실내를 난방 할 수 있는 독립적인 난방 시스템이 필요하다. 유도 가열기는 간단한 단열 구조로 무게가 가볍고 제조비용이 저렴하며 노드와 WP(Workpiece) 사이에 절연이 요구되지 않는다. 유도 가열기는 공진주파수에서 동작하며 가열 속도가 빠르기 때문에 전기자동차의 히터로 활용성이 뛰어나다. 유 도가열기의 주 열원은 동손과 철손으로 유도가열기의 동손이 증가하면 코일의 높은 절연 수준을 요구하기 때문에 가격이 상승하게 된다. 따라서 WP에 의한 철손을 증가시키는 것이 가열 효율에 중요한 영향을 미친다. 본 연구에 서는 FEM(Finite Elements Method) 분석을 통해 유도가열기와 인버터 회로의 연성해석을 통해 철손 최적화 설 계를 수행하였다. 최적화 분석을 통해 시뮬레이션에서 도출 된 모델을 제작하여 실험을 진행하였으며 비교 및 검증을 수행하였다. Electric vehicle is a driving system by receiving power from a battery, and the life of the battery decreases at low temperatures. The induction heater has a simple insulation structure, light weight, low manufacturing cost, and requires no insulation between the node and the heating element. The heat source of the induction heater is the copper loss and core loss. If the copper loss of the induction heater increases, the cost increases because it requires a high insulation level of the coil. Therefore, increasing the core loss has an important influence on the heating efficiency. In this study core loss optimization design was performed through the co-simulation analysis of the induction heater and the inverter circuit through FEM analysis. Through the optimization analysis, the model derived from the simulation was produced, the experiment was conducted, and the comparison and verification were performed.

전기자동차용 유도가열식 냉각수히터

김준수(Jun-su Kim),장길상(Kil-sang Jang),조경석(Kyung-seok Cho) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11

This paper deals with the experimental study for the development of high voltage induction coolant heater for EV. High voltage coolant heaters can solve two issues. One is cabin heating of green car that has no engine heat. The other issue is cold start of EV below -10 ℃ that harms its battery span. Integrated thermal systems are needed that can handle with cabin heating and battery warming-up at the same time. In this study, Induction coolant heater has been developed as a heat source of the thermal systems and its basic performances such as heating power, efficiency, coolant pressure drop have been met by building and testing samples based on study about working coil turn and work piece’s parameters such as diameter, length, thickness, permeability. As a result, its package is smaller and its weight is lighter than coolant heaters using PTC stone. So, we can expect better competitive price and fuel efficiency.