• Title/Summary/Keyword: alignment of coils

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A Study on the Intelligent Recognition of a Various Electronic Components and Alignment Method with Vision (지능적인 이형부품 인식과 비전 정렬 방법에 관한 연구)

  • Gyunseob Shin;Jongwon Kim
    • Journal of the Semiconductor & Display Technology
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    • v.23 no.2
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    • pp.1-5
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    • 2024
  • In the electronics industry, a lot of research and development is being conducted on electronic component supply, component alignment and insertion, and automation of soldering on the back side of the PCB for automatic PCB assembly. Additionally, as the use of electronic components increases in the automotive component field, there is a growing need to automate the alignment and insertion of components with leads such as transistors, coils, and fuses on PCB. In response to these demands, the types of PCB and parts used have been more various, and as this industrial trend, the quantity and placement of automation equipment that supplies, aligns, inserts, and solders components has become important in PCB manufacturing plants. It is also necessary to reduce the pre-setting time before using each automation equipment. In this study, we propose a method in which a vision system recognizes the type of component and simultaneously corrects alignment errors during the process of aligning and inserting various types of electronic components. The proposed method is effective in manufacturing various types of PCBs by minimizing the amount of automatic equipment inserted after alignment with the component supply device and omitting the preset process depending on the type of component supplied. Also the advantage of the proposed method is that the structure of the existing automatic insertion machine can be easily modified and utilized without major changes.

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Development and Application of Wireless Power Transmission Systems for Wireless ECG Sensors (지속적인 심장질환 모니터링을 위한 인체 삽입형 생체 센서의 무선전력전송 시스템)

  • Heo, Jin-Chul;Lee, Jong-Ha
    • Journal of the Institute of Convergence Signal Processing
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    • v.20 no.2
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    • pp.111-117
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    • 2019
  • We investigated the variations in the magnetic-field distribution and power transmission efficiency, resulting from changes in the relative positions of the transmitting and receiving coils, for electromagnetic-induction-type wireless power transmission using an elliptical receive coil. Results of simulations using a high-frequency structure simulator were compared to actual measurement results. The simulations showed that the transmission efficiency could be maintained relatively stable even if the alignment between the transmitting and receiving coils was changed to some extent. When the centre of the receiving coil was perfectly aligned with the centre of the transmitting coil, the transmission efficiency was the maximum; however, the degree of decrease in the transmission efficiency was small even if the centre of the receiving coil moved by ± 10mm from the centre of the transmitting coil. Therefore, it is expected that the performance of the wireless power transmission system will not be degraded significantly even if perfect alignment is not maintained. The results suggested a standardized application method of wireless transmission in the utilization of wireless power for implantable sensors.

Comparison of Magnetic Resonant Coupling Wireless Power Transfer Systems within Aligned and Unaligned Positions and Determining their Limits

  • Agcal, Ali;Bekiroglu, Nur;Ozcira, Selin
    • Journal of Magnetics
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    • v.21 no.4
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    • pp.652-659
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    • 2016
  • In this study, the efficiencies for both the angular aligned and unaligned positions of the receiver and transmitter coils of wireless power transfer (WPT) systems are examined. Some parameters of the equivalent circuit were calculated with Maxwell 3D software. The analytical solution of the circuit was calculated in MATLAB program through the composition of the system's mathematical modeling. The numerical solution of the system, however, was calculated using PSIM, which is circuit simulation software. In addition, with the use of the finite element method (FEM) in Maxwell 3D software, transient analysis of the three-dimensional system was performed. The efficiency of the system was estimated through the calculation of input and output power. The results demonstrated that power was efficiently transmitted to a certain extent in aligned and unaligned positions. The results also revealed that, for aligned positions, high efficiency with air gaps of 15-20 cm can be obtained and that the efficiency quickly dropped with air gaps of more than 20 cm. For spatially unaligned positions, it was observed that wireless power transfer could be realized with high efficiency with air gaps of up to 10 cm and that efficiency quickly dropped with air gaps of more than 10 cm.

The method of alignment detection between Tx and Rx set in wireless inductive charger (유도방식 무선충전기용 송수신 장치간 정렬상태 검출기법)

  • Lee, Sang Gon;Kim, Jae Moung
    • Journal of Satellite, Information and Communications
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    • v.9 no.1
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    • pp.90-96
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    • 2014
  • This paper is about increasing transfer efficiency of wireless power transmission. The new method is proposed to detect the alignment of transmitter and receiver of wireless charger and so smart phone can display the position of wireless charging receiver on its LCD panel for the maximum charging efficiency. The previous method is only to show the transfer efficiency, but this method is to show not only the efficiency but also coordinates of receiver. The apparatus of the wireless charger is based on WPC(Wireless Power Consortium) standard and has planar air coil combined with magnet shield in Tx and Rx device so that the leakage flux is minimized on condition of under hundreds of kHz operating frequency. In this paper, it's showed that relation of magnet field and distance of each coils can be linearized and position information of Tx and Rx device is calculated thru trigonometry. Through the experiment, the obstacles of linearity are discovered and also showed that it can be optimized. and so the presented method is suitable for alignment detection method of Tx and Rx device in WPC wireless charger.

Fabrication of Planar Type Inductors Using FeTaN Magnetic Thin Films

  • Kim, Chung-Sik;Seok Bae;Jeong, Jong-Han;Nam, Seoung-Eui;Kim, Hyoung-June
    • Journal of Magnetics
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    • v.6 no.2
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    • pp.73-76
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    • 2001
  • A double rectangular spiral type inductor has been fabricated by using FeTaN films. The inductor is composed of internal coils sandwiched by magnetic layers. Characteristics of inductor performance are investigated with an emphasis on planarization of magnetic films. In the absence of the planarization process, the grating topology of the upper magnetic films over the coil arrays degrades the soft magnetic properties and the inductor performance. It also induces a longitudinal magnetic anisotropy with the easy axis aligned to the magnetic flux direction. This alignment prevents the upper magnetic films from contributing to the total induction. Glass bonding is a viable method for achieving a completely planar inductor structure. The planar inductor with glass bonding shows excellent performance: inductance of 1.1 $\mu H$, Q factor of 7 (at 5 MHz), and the current capability up to 100 mA.

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Development of a Brushless Linear DC Motor for High Speed and Precise Position Control (고속 정밀용 브러시 없는 리니어 직류 모터 개발)

  • 이강원;조영준;송창섭
    • Journal of the Korean Society for Precision Engineering
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    • v.15 no.10
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    • pp.73-80
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    • 1998
  • Recently, we have developed a linear brushless DC motor(LBLDCM) with high speed and precise position control performance to apply it to the semiconductor assembly and inspection machinery. It is composed of double side alignment by two armature-stator pairs and each pair is consist of a moving armature with 8 poles by 3 phase coils and a stator with rare earth permanent magnet (Nd-Fe-B) arrays. Through the thrust force analysis on a simplified and whole model of the suggested LBLDCM by an Electromagnetic FEM solver, skew angle of magnet arrays to reduce the thrust force ripple and the winding conditions of the armature is designed. From experimental results, the user's requirements was satisfied and we confirmed distinctly that the repeatable accuracy less than a micron of the linear motion can be obtained at high speed by the developed LBLDCM. This is owing to directly drive the work without the gear train.

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Fabrication of Planar Type Inductor Using FeTaN Magnetic thin Films

  • Kim, Chung-Sik;Seok Bae;Jeong, Jong-Han;Nam, Seoung-Eui;Kim, Hyoung-June
    • Proceedings of the Korean Magnestics Society Conference
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    • 2000.09a
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    • pp.532-538
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    • 2000
  • A double rectangular spiral inductor is fabricated using FeTaN films. The inductor is composed of internal coils sandwiched by magnetic layers. Characteristics of inductor performance are investigated with an emphasis on planarization of magnetic films. In the absence of the planarization process, the grating topology of upper magnetic films over coil arrays degrades the soft magnetic properties and the inductor performance. It also induces a longitudinal magnetic anisotropy with the easy axis aligned to the magnetic flux direction. This alignment prevents the upper magnetic films from contributing to the total induction. Glass bonding is a viable method for achieving a completely planar inductor structure. The planar inductor with glass bonding shows excellent performance : inductance of 1.1 H, Q factor of 7 (at 5 MHz), and the dc current capability up to 100 mA.

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Compact Wireless IPT System Using a Modified Voltage-fed Multi-resonant Class EF2 Inverter

  • Uddin, Mohammad Kamar;Mekhilef, Saad;Ramasamy, Gobbi
    • Journal of Power Electronics
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    • v.18 no.1
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    • pp.277-288
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    • 2018
  • Wireless inductive power transfer (IPT) technology is used in many applications today. A compact and high-frequency primary side inverter is one of the most important parts of a WPT system. In this study, a modified class EF-type voltage-fed multi-resonant inverter has been proposed for WPT application at a frequency range of 85-100 kHz. Instead of an infinite input choke inductor, a resonant inductor is used to reduce loss and power density. The peak voltage stress across the MOSFET has been reduced to almost 60% from a class-E inverter using a passive clamping circuit. A simple yet effective design procedure has been presented to calculate the various component values of the proposed inverter. The overall system is simulated using MATLAB/SimPowerSystem to verify the theoretical concepts. A 500-W prototype was built and tested to validate the simulated results. The inverter exhibited 90% efficiency at nearly perfect alignment condition, and efficiency reduced gradually with the misalignment of WPT coils. The proposed inverter maintains zero-voltage switching (ZVS) during considerable load changes and possesses all the inherent advantages of class E-type inverters.

A Study on Mobile Robot Auto Recharging System Based on Wireless Power Transmission and Visual Information (영상정보를 이용한 이동로봇의 무선 전력전송 자동충전에 관한 연구)

  • Kim, Jae-Oh;Lee, Kyung-Jung;Ahn, Hyun-Sik;Moon, Chan-Woo
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.11 no.5
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    • pp.35-40
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    • 2011
  • In this paper, an auto recharging system for a mobile robot based on the wireless power transmission and visual information is proposed. The existing recharging systems for mobile robot use mechanical contact while wireless power transmission transfers energy by electromagnetic induction method without contacts. For efficiency of charging, alignment of coils is important. In order to solve this problem, with the visual image, ellipticity of coil circle is recognized to control the pose of mobile robot.

Study on Assembly of TF Coil Structure in KSTAR Tokamak (KSTAR 토카막 장치에서 TF 자석 구조물의 조립에 관한 검토)

  • Kim, K.M.;Choi, C.H.;Hong, K.H.;Yang, H.L.;Yu, I.K.;Her, N.I.;Sa, J.W.;Kim, H.K.;Kim, G.H.;Kim, S.T.;Kim, H.T.;Yang, J.S.;Bak, J.S.;Kim, C.H.
    • Proceedings of the KSME Conference
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    • 2003.11a
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    • pp.1262-1267
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    • 2003
  • TF magnet structures are the main structural components in the KSTAR magnet systems to protect the superconducting coils from mechanical, electrical, and thermal loads. TF coil structure supports CS and PF coil system. The inter-coil structure contains adjustable shear keys and conical bolts to provide pre-loading in toroidal direction and to resist against in-plane and out-of-plane forces that are the most critical loads on the TF magnet system. The conical bolts and shear keys are specially designed to assemble easily and to provide a convenient accommodation for a good alignment. The connection plate that is one of the prototype fabrications had been manufactured to study adjustability of conical bolts and shear keys for assembly of TF coil structure. We could measure the misalignments at the keyways and conical holes with the misalignment measuring instrument.

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