• Title, Summary, Keyword: Inductive power transmission

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Study on Design and Application of an Inductive Coupler for Power Transmission Line (송전선용 비접촉식 커플러의 설계와 적용연구)

  • Kim, Hyun-Sik;Lee, Dong-Chul;Kim, Min-Ho;Lee, Gean;Oh, Young-Woo;Min, Byung-Hoon
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.23 no.3
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    • pp.234-239
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    • 2010
  • An inductive coupler, which feeds communication to the electric power transmission line, is required to establish Power Line Communication(PLC). The electro-magnetic property of magnetic core and design technology for coupler are very important to manufacture an inductive coupler for power transmission line. The magnetic core with superior electro-magnetic property was manufactured by using nanocrystalline alloy and an inductive coupler, which can operate at the maximum 2,000 A current, was designed and manufactured by establishment of current saturation, signal out winding, and electromagnetic simulation in this study. Communication speed of 14 Mbps in 600 meter communication distance of the real electric power transmission line was obtained by using the inductive coupler and application possibility of the inductive coupler for the electric power transmission line was certified.

Design of an Inductive Coupler for Power Transmission line (송전선용 대용량 신호결합장치의 설계)

  • Kim, H.S.;Byun, W.B.;Kim, J.R.;Bae, E.R.;Lee, D.C.;Lee, H.Y.;Lee, J.H.;Ji, M.K.
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.439-440
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    • 2008
  • An inductive coupler, which feeds communication to the electric power transmission line, is required to establish Power Line Communication(PLC). The electro-magnetic property of magnetic core and design technology for coupler are very important to manufacture an inductive coupler for power transmission line. The magnetic core with superior electro-magnetic property was manufactured by using nano-crystalline alloy and an inductive coupler, which can operate at the maximum 2,000 A current, was designed and manufactured by establishment of current saturation, signal out winding, and electro-magnetic simulation in this study. Communication speed of 14 Mbps in 600 m communication distance of the real electric power transmission line was obtained by using the inductive coupler and application possibility of the inductive coupler for the electric power transmission line was certified.

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Wireless Power Transmission using Electromagnetic Inductive Coupling and LC Resonant (자기유도방식과 LC공진을 이용한 무선전력전송기기)

  • Lee, Seung-Hwan;Kimm, Hyoen-Min;Kim, Hee-Je;Kim, Su-Weon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.62 no.3
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    • pp.349-354
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    • 2013
  • Wireless power transmission introduced by Tesla has instrumented by many scientists of the world. This technique first was utilized as wireless communications such as radio in long range transmission. And contactless transmission using inductive property was used on white goods. In 2007, MIT' lab introduced that new wireless power transmission by magnetic resonance which has about 50% efficiency and 2M transmission distances, it was a chance to refocus a new possibility of wireless power transmission. In this paper, using LC coupling compensate the short distances of contactless transmission, this simple method could transmit about 30cm distances. Using this approach, it can be solved the short transmission distances, a drawback of Electromagnetic inductive coupling method.

Analysis of RF Inductive Couplers for Power Line Communication (전력선 통신의 RF 유도형 결합기 해석)

  • Noh, Young Seok;Lee, Gunbok;Park, Wee Sang
    • KEPCO Journal on Electric Power and Energy
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    • v.1 no.1
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    • pp.85-91
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    • 2015
  • We investigated the structure of inductive coupler and its magnetic coupling to increase the transmission coefficient for power line communication. A Rogowski coil, which is an air-cored inductive coupler, and a magnetic cored coupler were fabricated to analyze the transmission coefficient for different coupler parameters. This paper proposes the impedance matching method using lumped elements and an impedance transformer to increase the transmission coefficient. In the experiment, the transmission coefficient of the proposed system was increased in both narrowband and broadband cases, and a trade-off between the transmission coefficient and the bandwidth was shown. This method will be useful for the further study of impedance matching with the load variation.

Characteristic of Linear Inductive Power Transmission According to the load variation (부하 변동에 따른 선형 유도 전력 전달 장치의 특성 해석)

  • 구대현;홍정표;강도현
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.52 no.12
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    • pp.595-601
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    • 2003
  • For a control of CPS(Contactless Power Supply), the paper deals with the results which are simulated by a equivalent electric circuit on the LIPT(Linear Inductive Power Transmission). In order to control the CPS, the output values is handled with the driving frequency according to the change of a load. The method that controls the driving frequency for adjusting the output power is reasonable to be applied to the controller. But, when the driving frequency meets the resonant frequency and passes, it lead to a serious problem. Therefore, the controlled region of the driving frequency has to be predicted and determined by the simulation of a electric circuit.

Wireless power transmission using LC resonant with cores (자기 유도 방식과 LC 공진을 이용한 무선 전력 전송기기)

  • Lee, Seung-Hwan;Kim, Hyun-Min;Kim, Hee-Je
    • Proceedings of the KIPE Conference
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    • pp.25-26
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    • 2012
  • Wireless power transmission introduced by Tesla has instrumented by many scientists of the world. This technique first was utilized as wireless communications such as radio in long range transmission. And contactless transmission using inductive property was used on white goods. In 2007, MIT' lab introduced that new wireless power transmission by magnetic resonance which has about 50% efficiency and 2M transmission distances, it was a chance to refocus a new possibility of wireless power transmission. In this paper, using LC coupling compensate the short distances of contactless transmission, this simple method could transmit about 30cm distances. Using this approach, it can be solved the short transmission distances, a drawback of Electromagnetic inductive coupling method.

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Signal Transmission Properties of the Inductive Coupler using the High Permeability Magnetic Materials

  • Kim, Hyun-Sik;Kim, Jong-Ryung;Lee, Hae-Yeon;Kim, Ki-Uk;Huh, Jeong-Seob;Lee, Jun-Hui;Oh, Young-Woo;Byon, Woo-Bong;Gwak, Kwi-Yil;Ju, Seong-Ho
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.19 no.4
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    • pp.339-343
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    • 2006
  • We observed the application possibility of inductive coupler for the underground high-voltage power line communication by means of analysis of signal transmission characteristics and magnetic properties on annealing temperatures for high-permeability Fe-base amorphous alloys. The best electromagnetic and transmission characteristics were shown in nano-crystalline precipitated alloy annealed at temperature $510^{\circ}C$. The transmission characteristics in the low-frequency band depend on permeability of magnetic core materials and its properties of high-frequency band can be improved by impedance matching. Using the high pass filter embedded in the coupler, other noise signal band except for communication signals could be cut off.

A New Maximum Inductive Power Transmission Capacity Tracking Method

  • Ameri, Mohammad Hassan;Varjani, Ali Yazdian;Mohamadian, Mustafa
    • Journal of Power Electronics
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    • v.16 no.6
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    • pp.2202-2211
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    • 2016
  • In certain applications, such as IPT-based EV charger (IPTEC), any variation in alignment and distance between pickup and charger primary leads to a change in leakage and magnetic impedance magnitudes. The power transmission capacity is not always at the maximum level because of these variations. This study proposes a new low-cost tracking method that achieves the Maximum Inductive Power Transmission Capacity (MIPTC). Furthermore, in the proposed method, the exchange of information between load and source is not required. For an application such as IPTEC, the load detected by the IPTEC varies continuously with time because of the change in state of the charge. This load variation causes a significant variation in IPT resonant circuit voltage gain. However, the optimized charging output voltage should be kept constant. From the analysis of the behavior of the IPT circuit at different working frequencies and load conditions, a MIPTC operation point that is independent of load condition can be identified. Finally, the experimental results of a developed prototype IPT circuit test show the performance of the proposed method.

Analysis of a Linkage Coil for Wireless Power Transmission by Inductive Coupling

  • Gimm, Youn-Myoung;Yoo, Ho-Sang;Kim, Myoung-Wha;Yoo, Jae-Sung
    • Journal of electromagnetic engineering and science
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    • v.8 no.1
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    • pp.23-27
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    • 2008
  • Magnetic coupling delivering wireless power in capsular endoscope(CE) is described in this paper. The characteristic of the magnetic flux linkage coil which generates the induced electromotive force(emf) under the magnetic field was analyzed. With the analyzed results, a magnetic flux linkage coil system was developed and tested. It was confirmed that the magnetic flux linkage coil system could supply more than 50 mW power at 125 kHz without changing the structure of conventional CE.

Design of Two-Dimensional Lateral Antenna for Wireless Power Transmission to In Vivo Robotic Capsule

  • Kim, Jong-Dae;Lee, Seon-Woo;Ryu, Mun-Ho;Kim, Jong-Won
    • Journal of Biomedical Engineering Research
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    • v.29 no.3
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    • pp.187-190
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    • 2008
  • This paper presents two dimensional receiving coils to provide hundreds of milli-watt power via inductive link to in vivo robotic capsules, whose orientation are practically undetermined. The wireless power transmission system consists of a transmitter powered by class E power amplifier, and a receiver with three dimensional antenna, rectifier, and voltage regulator. As the 2D lateral antenna construction is more critical for the receiving antenna, two types of 2D antennas are introduced and evaluated by theoretic and experimental analyses. Experimental results verifies that the cross-type construction show better directional performance for receiving power than the cylindrical one for the 2D antenna. The former could deliver the power homogeneously regardless of its orientation, with less than 20 % of variation from the possible maximum power.