• Title/Summary/Keyword: magnetic core

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The Analysis for the Simulational Characteristics of the Electronic CT & PT using EMTP (EMTP를 이용한 전자식 CT, PT의 시뮬레이션 특성 분석)

  • Shin Jung Eun;Kim Jae Chul;Song Seung Youp;Kwon Young Mok;Kim On Suk;Choo Dong Wook
    • Proceedings of the KIEE Conference
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    • summer
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    • pp.310-312
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    • 2004

  • Generally, instrument transformer of the core type have been used for measuring current. Because instrument transformer has defects, electronic instrument was appeasred. This paper is introduced a basic concept and thoery of electronic instrument and described the the simulation of core type CT and no saturation CT. The evaluation of CT models implemented using EMTP(Electro Magnetic Transients Program) was carried out. The result of comparison both core type CT and no saturation CT are presented.

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A Study on The characteristics based on the stauration effects of traction motor for korea High Speed Train (한국형 고속전철용 견인전동기의 포화현상에 따른 특성연구)

  • 이상우;김근웅;윤종학;한성수
    • Proceedings of the KSR Conference
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    • 1999.11a
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    • pp.360-367
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    • 1999

  • An inverter-driven induction motor is used as the traction motor for a high speed drive system that required safety, reliabillity, performance, compact size owing to the space and weight alloted for attaching to train, etc. particularly it is possible to happen the saturation effects of flux density at constant voltage-frequency region and then increase very higher than the at lowed capacity of no-load current and temperature in any case. therefore the optimum design of core, optimum voltage-frequency ratio, adoption of high grade magnetic core have been developed and researched for preventing these problems. this paper show the saturation effects of traction rotor by measuring the induced voltage of search coil at stator teeth and presents optimum voltage-frequency ratio as well as optimum core design through the comparison with efficiency, power factor, load current and no-load current for korea high speed train.

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Balanced Tapped Inductors for RPPT BCDR(Battery Charger DisCharger) (RPPT 시스템을 위한 새로운 배터리 충.방전기)

  • 이기선
    • Proceedings of the KIPE Conference
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    • 2000.07a
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    • pp.472-475
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    • 2000

  • An balanced tapped inductors using RPPT (Regulated Peak Power Tracking) system is proposed. In the series/parallel PPT system battery charger and discharger are operating complementary. So they both can be combined into a single hardware block. Battery charger and dis-charger share same magnetic cores thus can be reduced core weights.

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