• Title/Summary/Keyword: High-voltage motor

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Development of monitoring system of static frequency converter in pumped storage power plant (양수발전소 SFC 감시시스템 개발)

  • Lee, Joo-Hyun;Lim, Ick-Hun;Ryu, Ho-Sun;Sin, Man-Soo;Kim, Bong-Suk
    • Proceedings of the KIEE Conference
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    • 2006.04a
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    • pp.213-215
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    • 2006
  • A static frequency converter(SFC) in a pumped storage power plant is important equipment for converting electric motor kinetic energy into electric Bower. A SFC monitoring system consists of high voltage thyristor firing equipment, fault detection module, data gathering module, real time data processing equipment and man machine Interface system. This paper describes SFC system overview, developed SFC monitoring system configuration including system characteristics. and successful application result to San-Cheong pumped storage power plant.

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Modeling of Variable Voltage DC Link Inverter for High Efficient Motor Drives (고성능 전동기 구동을 위한 DC Link 가변 전압 인버터 모델링)

  • Um, Jun-Mo;Kim, Tae-Eun;Kim, Jun-Hyung;Lee, Byoung-Kuk
    • Proceedings of the KIEE Conference
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    • 2008.10c
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    • pp.237-239
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    • 2008
  • 본 논문에서는 Matlab Simulink을 사용하여 고성능 BLDC(Brushless DC) 전동기 드라이브를 위한 DC Link 가변 전압 인버터 모델링을 제안한다. 다른 프로그램을 이용한 BLDC 전동기 시뮬레이션은 하드웨어적인 구현에는 유리하지만 처리속도가 늦고, 계산상의 오차가 크게 발생하는 단점이 있다. 이러한 단점을 보완하기 위해 수식기반인 Matlab Simulink를 활용하여 보다 정확하고 연산 속도가 빠른 시뮬레이션을 수행하였다. 제안된 모델은 승압 및 강압모드가 가능한 2-스위치 buck-boost 컨버터와 6-스위치 인버터 및 BLDC 전동기로 구성되고, 시뮬레이션을 통하여 전동기의 속도에 따른 DC Link 전압의 가변을 확인하였다.

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Demagnetization Diagnosis of Permanent Magnet Synchronous Motor for Electric Vehicle by Using Low Voltage High Frequency Signal Injection Method (저전압 고주파 주입법을 이용한 전기자동차용 영구자석 동기전동기의 감자현상 진단)

  • Yoo, Jin-Hyung;Lee, Gyeong-Chan;Jung, Tae-Uk
    • Proceedings of the KIEE Conference
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    • 2015.07a
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    • pp.661-662
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    • 2015
  • 최근 친환경적인 기술 개발에 대한 요구가 증가함에 따라 기존 엔진의 역할을 직접적으로 대체하게 되는 전기자동차용 전동기에 대한 연구가 활발히 진행되고 있다. 영구자석을 사용한 전동기의 경우, 계자 권선이 없기 때문에 회전자 동손이 없어지면서 효율이 높아지는 장점이 있지만 온도 상승 및 과부하 등으로 인한 영구자석의 불가역 감자로 인한 고장 가능성이 존재한다. 본 논문에서는 이러한 영구자석 감자현상을 진단하기 위한 방법 중 하나로 회전자 구속 조건에서 저전압 고주파 주입을 통한 입력전류 파형의 스펙트럼 분석을 제안한다. 제안한 방법은 전동기의 회전자를 구속시킨 상태에서 진단신호를 입력하고 인버터의 출력전류 파형을 측정하여 스펙트럼 분석을 수행하는 방법이다. 제안한 방법은 시뮬레이션을 통해 검증하였다.

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Development and Commercialization of H-Bridge Multilevel Inverter for Medium-Voltage & High-Power Induction Motor Drives (고전압 대용량 유도전동기 구동용 H-브릿지 멀티레벨 인버터의 개발 및 상용화)

  • Park, Young-Min;Ryu, Han-Seong;Lee, Hyun-Won;Jung, Myung-Gil;Lee, Se-Hyun
    • Proceedings of the KIPE Conference
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    • 2010.07a
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    • pp.293-294
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    • 2010
  • 본 논문에서는 신뢰성 있으며 실용적인 고전압 대용량 유도 전동기 구동용 H-브릿지 멀티레벨 인버터를 개발하여 산업 현장에 적용한 내용을 소개한다. PEBB (Power Electronics Building Blocks)에 기초한 신뢰성 있는 전력회로 및 분산제어, 그리고 실용적인 PWM (Pulse Width Modulation) 방식을 적용하였다.

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Analysis of Electro-magnetic Interference Noise for Eco-friendly Vehicle (친환경 자동차의 전자파 방사 노이즈 특성 분석)

  • Kim, Hae-Sung;Yong, Boo-Joong
    • Transactions of the Korean Society of Automotive Engineers
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    • v.19 no.6
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    • pp.76-81
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    • 2011
  • Fossil fuel, the energy source of internal combustion engine automobiles, is limited in resource and has caused environmental issues for decades. Accordingly, automobile manufacturers from many countries around the world are developing or producing eco-friendly vehicles that utilize alternative sources of energy. These vehicles are equipped with many electronic and electrical components which operate on high voltage and/or large current that were not used in conventional combustion engine automobiles. In this paper, in order to analyze the electro-magnetic interference noise, electric vehicles and fuel cell electric vehicles are tested under the guidelines of KMVSS (Korean Motor Vehicle Safety Standards) as well as under test modes that are not stipulated under the guidelines.

The Speed Character Measurements of the Single Phase SRM by using the Unipolar driving curcuit (유니폴라 구동회로를 이용한 단상 SRM의 속도 특성 측정)

  • Kim, Yong-Heon;Lee, Eun-Woong;Lee, Jong-Han;Jo, Yeon-Chan
    • Proceedings of the KIEE Conference
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    • 2006.07b
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    • pp.887-888
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    • 2006
  • Switched Reluctance Motor(SRM) is rotated by reluctance force generated between rotor pole and stator pole. So SRM must be switched by exciting current according to rotor position. but SRM takes the advantages of high speed driving and very simple structure. The single phase SRM can not be start by itself and torque ripple is generated more than multi-phase SRM. But mechanical structure and driver is simpler than multi-phase SRM. The single phase SRM driver is composed with the absolute encoder and DSP to control exciting section and current, and is supplied by constant voltage. So The paper is intend to measure the speed charactrer of double silent pole type SRM by using the unipolar driving curcuit.

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A Study on the Analysis on the Direct-Driven High Power Permanent Magnet Generator for Wind Turbine

  • Kim, Ki-Chan;Ihm, Hyung-Bin;Lee, Ju
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.22 no.3
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    • pp.88-95
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    • 2008
  • In the paper, the permanent magnet synchronous generator of 1.5[MW] output power which is driven directly without gear system is designed by conventional magnetic equivalent circuit method and analyzed by finite element method. We analyzed the characteristics of generator like no load, rated load, short circuit condition and demagnetization of permanent magnet in order to verify the design results by magnetic circuit method. The last, the analysis results of two kinds of rotor types are compared with each other. Especially the THD(total harmonic distortion) of output voltage is examined for the comparison.

Study on the Design of DC-DC Converter for Super Junction MOSFET Battery Charger of Electric Vehicles (전기자동차 배터리 충전을 위한 DC - DC컨버터용 Super Junction MOSFET 설계에 관한 연구)

  • Kim, Bum June;Hong, Young Sung;Sim, Gwan Pil;Kang, Ey Goo
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.26 no.8
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    • pp.587-590
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    • 2013
  • Release competition and development of eco-friendly vehicles have been conducted violently also automaker, it will be a high growth industry of the charger and battery, which is the driving source of the motor of an electric vehicle. Reduces the on-resistance power elements DC - DC converter for battery charger for electric vehicles, must minimize switching losses. Should have a low on-resistance power than existing products. Compare the Super Junction MOSFET and Planar MOSFET, As a result, super junction MOSFET improve on about 87.4% on-state voltage drop performance than planar MOSFET.

Control Mode Switching of Induction Machine Drives between Vector Control and V/f Control in Overmodulation Range

  • Nguyen, Thanh Hai;Van, Tan Luong;Lee, Dong-Choon;Park, Joo-Hong;Hwang, Joon-Hyeon
    • Journal of Power Electronics
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    • v.11 no.6
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    • pp.846-855
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    • 2011
  • This paper proposes a control mode switching scheme between vector control and constant V/f control for induction machine (IM) drives for maximum torque utilization in a higher speed region. For the constant V/f scheme, a smooth transition method from the linear range of PWM up to the six-step mode is applied, by which the machine flux and torque can be kept constant in a high-speed range. Also, a careful consideration of the initial phase angle of the voltage in the transient state of the control mode change between the vector control and V/f schemes is described. The validity of the proposed strategy is verified by the experiment result for a 3-kW induction motor drives.

Reliability Improvement of H-Bridge Multilevel Inverter for Medium-Voltage & High-Power Induction Motor Drives (고전압 대용량 유도전동기 구동용 H-브릿지 멀티레벨 인버터의 신뢰성 향상)

  • Park, Young-Min;Lee, Kwang-Hwan;Lee, Se-Hyun
    • Proceedings of the KIPE Conference
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    • 2013.07a
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    • pp.155-156
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    • 2013
  • 본 논문에서는 고전압 대용량 유도전동기 구동용 H-브릿지 멀티레벨 인버터의 신뢰성 향상을 위한 전력 회로 모듈화, 제어 장치 분산화, 제어기와 통신 이중화, 그리고 Power Cell 고장 발생시 인버터 연속 운전 방법을 소개하였다. 신뢰성 향상을 위해 적용된 방법은 다양한 전압과 용량의 H-브릿지 멀티레벨 인버터를 설계 및 제작하여 각종 부하 실험, 산업 현장 적용을 통해 타당성과 실용성을 입증하였다. 또한 실제 제품 설계, 생산, 판매, 유지 보수 과정을 통해 설계의 유연성, 유지보수의 편리성, 잉여성 확보, 그리고 사용자 요구에 대한 대응성이 우수함을 확인하였다.

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