• Title/Summary/Keyword: pick-up coil

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PCB Integrated Spiral Pattern Pick-up Coil Current Measurement Scheme with High Sensitivity for WBG Devices (WBG 소자를 위한 높은 측정 감도를 가지는 PCB 내장형 Spiral 패턴 Pick-up Coil 전류 측정 기법)

  • Kim, Kyeong-Mo;Cha, Hwa-Rang;Kim, Rae-Young
    • The Transactions of the Korean Institute of Power Electronics
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    • v.25 no.3
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    • pp.162-170
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    • 2020
  • In this paper, we report our study of the current measuring technique by implementing a pick-up coil in the PCB pattern instead of the current measuring sensor in a power converter using a WBG device. The proposed PCB pattern coil structure has a higher mutual inductance value than the conventional pattern by constructing the coil using the multi layer board. It has high sensitivity and is configured without additional process outside the PCB. In the current measurement, the integrator is measured by integrating the coil at the back end and the current waveform measured using proposed pick-up coil is confirmed by comparing it with the original current waveform through DPT simulation.

Asymmetric Optical Pick-Up Actuator with PCB-Coil (PCB-Coil을 이용한 비대칭 광픽업 액추에이터)

  • 임장영;신경식;홍구;김진기;전영진;이두환;배원철;이재걸
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2004.05a
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    • pp.362-365
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    • 2004
  • 'Coil' occupies a much important position in delivering driving force of optical pick-up actuators. Up to now the main stream has been a winding coil type actuator, but actuators using FP-Coil(Fine Pattern Coil) have been considered for the more compacted and simple manufacturing process and have variously spreaded the application fields by product. We have tried to design actuators using PCB-Coil(Printed Circuit Board Coil) which has benefits in terms of price and manufacturing process. Especially this research has two main things those are to reduce the vibration of sub-resonance and to assure the do sensitivity in the performance of asymmetric optical pick-up actuator with PCB-Coil.

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Analysis the Performance of Asymmetric Optical Pick-up Actuator with PCB type Coil (PCB형 코일을 이용한 비대칭 광픽업 액추에이터의 성능분석)

  • Shin KyungSik;Hong Goo;Kim JeenGi;Jun YoungJin;Lee DooHwan;Bae WonCheol;Lee JaeKul;Im JangYoeng
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.14 no.9 s.90
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    • pp.891-896
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    • 2004
  • 'Coil' occupies very much important position in delivering driving force of optical pick-up actuators. Up to now the main stream has been a winding coil type actuator, but actuators using FP-Coil(fine pattern coil) have been considered for the more compacted and simple manufacturing process and have variously spreaded the application fields by product. We have tried to design actuators using PCB-Coil(printed circuit board coil) which has benefits in terms of price and manufacturing process. Especially this research has two main things to reduce the vibration of sub-resonance and to assure the DC sensitivity among the performances of asymmetric optical pick-up actuator with PCB-Coil.

2-Dimensional Fluxgate Sensor using Ferrite Ring Core (페라이트 링코어를 이용한 2차원 Fluxgate 센서)

  • 임재환;박한석;안영주;김남호;류지구
    • Proceedings of the Korea Institute of Convergence Signal Processing
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    • 2003.06a
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    • pp.251-255
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    • 2003
  • In this paper, we have a fluxgate sensor with ferrite core. Thought sensor is consist of one excitation coil and two pick-up coil, and A lock-in amplifier circuity is designed for Signal processing of picking up 2nd harmonics from pick-up coils. Excitation coils is turned by 20 turns, and pick-up coil for picking up harmonics is turned by 40 turns eachother. It convert 2nd harmonics to DC output voltage. Measured output voltage and sensitivity, direction of sensor about out side magnetic field, and also sensor output properties about excitation frequency and current.

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PCB Integrated Pick-up Coil Structure with High Mutual Inductance for Current Measurement of GaN Devices (GaN 소자의 전류 검출을 위한 높은 상호 인덕턴스를 가지는 PCB 내장형 Pick-up Coil)

  • Kim, Kyeong-Mo;Cha, Hwa-Rang;Yang, Si-Seok;Kim, Rae-Young
    • Proceedings of the KIPE Conference
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    • 2019.11a
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    • pp.90-92
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    • 2019
  • 본 논문은 GaN 디바이스를 사용하는 전력변환장치에서 Pick-up coil을 PCB 패턴으로 구현하여 전류를 측정하는 기법에 관하여 제안한다. 기존에 사용되는 PCB 패턴 코일 구조의 경우 PCB 이중층만 구성하여 관통 홀이나 추가공정이 필요함에 비해 본 논문에서 제안한 PCB 패턴 코일 구조의 경우 다층기판을 사용하여 코일을 구성함으로서 기존의 패턴에 비해 높은 상호 인덕턴스 값을 가지게 되고, 코일의 출력 전압값이 높아져 더 높은 감도를 가지게 된다. 또한 PCB 외부의 추가적인 공정 작업이 없이 구성이 되었다. 전류 측정은 코일 뒷단에 적분기를 통합하여 구성하였으며, 시뮬레이션을 통해 전류 측정 성능을 검증한다.

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Development of Control Algorithm and Pick & Placer (반도체 소자 Pick &Placer 및 제어 알고리즘 개발)

  • 심성보;김재희;유범상
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.10a
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    • pp.1339-1343
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    • 2004
  • This paper presents a development of the control algorithm and Pick & Placer. The Pick & Placer provides a powerful multi-task system that includes both graphical and remote interface. Users can easily set up sorting parameters and record important data including wafer number, data, and operator information. This System sets up a dustproof device and massively machined components to provide an extremely stable sorting environment. Precise resolution and accuracy result from using machine vision, a pneumatic slide drive and close -looped positioning.

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The utilities of U-shape EM sensor in stress monitoring

  • Wang, Guodun;Wang, Ming L.
    • Structural Engineering and Mechanics
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    • v.17 no.3_4
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    • pp.291-302
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    • 2004
  • In this paper, load monitoring technologies using U-shape Magnetoelastic (EM or ME) sensors have been exploited systemically for the first time. The steel rod to be tested is the Japan 7 mm piano steel rod. The load dependence of the magnetic properties of the piano steel rod was manifested. Two experimental designs of U-shape magnetoelastic sensors were introduced, one with double pick-up concentric coils wound on the rod to be tested, the other with pick-up coil on one yoke foot. The former design is used to derive the correlation of the relative permeability with elastic tension, while the latter is aimed to reflect the stress induced magnetic flux variation along the magnetic circuit. Magnetostatic simulations provide interpretations for the yoke foot sensing technology. Tests with double pick-up coils indicate that under proper working points (primary voltages), the relative permeability varies linearly with the axial load for the Japan 7 mm piano steel rod. Tests with pick-up coil on the yoke foot show that the integrated sensing voltage changes quadratically with the load, and error is more acceptable when the working point is high enough.

Anisotropic Magnetoresistance Analysis of Permalloy Film Using 2-dimensional Magnetization Vector Measurement (2차원 자화벡터를 이용한 퍼멀로이 박막의 이방성자기저항 해석)

  • Lee, Young-Woo;Hu, Yong-Kang;Lim, Jae-Joon;Kim, Cheol-Gi;Kim, Chong-Oh;Yoon, Tae-Sick
    • Journal of the Korean Magnetics Society
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    • v.14 no.4
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    • pp.115-119
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    • 2004
  • We measured in-plane 2 dimensional magnetization vector using two pick-up coil sets and investigate the relationship between magnetization vector and anisotropic magnetoresistance. We can determine magnetization vector by measuring magnetic moment in x and y direction simultaneously. As the uniaxial magnetic anisotropy of permalloy film increases, magnetoresistance approaches the expectation which is calculated from the angle between current vector and magnetization vector. Magnetoresistance ratio is linearly proportional to the y moment magnitude which is parallel to the current direction.

Ultra Slim U-I & W-I Primary and Pick-up Coil Design for OLEV (온라인 전기자동차용 초박형의 U-I형 및 W-I형 급집전코일 설계)

  • Lee, Sung-Woo;Park, Chang-Byung;Cho, Jung-Goo;Cho, Gyu-Hyeong;Rim, Chun-Taek
    • The Transactions of the Korean Institute of Power Electronics
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    • v.16 no.3
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    • pp.274-282
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    • 2011
  • The ultra slim U-I and W-I primary and pick-up coils for OLEV (On-Line Electric Vehicles) are proposed. With the proposed structures, the amount and the cost of the core are dramatically reduced. Not only air gap but also the lateral displacement are improved. The proposed structures are applied to the OLEV bus and SUV, which achieve 83% efficiency at 17cm air gap with more than 60kW output power, and the construction cost is lower than ₩300M/km. The proposed coil structures are verified with simulations and experiments.

The Design of a I/O Interface Circuits for the Signal Driver of the Engine Control Relays and the Output Signal Monitoring of Diesel Generator (디젤 발전기 출력 신호의 모니터링 및 엔진제어 릴레이 구동을 위한 입출력 인터페이스 회로 설계)

  • Joo, Jae-hun;Kim, Jin-ae;Choi, Jung-Keyng
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2009.05a
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    • pp.547-550
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    • 2009
  • This paper presents a digital based input/output interface circuit for controlling and monitoring the Diesel Engine Generator for Emergency. In order to monitor and control of the Emergency Diesel Engine Generator, controlling and monitoring circuits need 5 analog input channels, 2 pick-up coil measuring circuits, 10 digital input channels containing Broken Wire Detect function, and 7 relay control signal output channels. This system performs signal processing of input signal taking advantage of simple filter circuit, photo-coupler and comparator circuit at analog input parts, and output signals for main relay is designed acting by double control, so it prevents malfunction completely. And it improves accuracy of speed input signal by applying digital circuit that processes pick-up coil signal.

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