• Title/Summary/Keyword: 5-레그 인버터

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Performance Analysis of a Five-leg Inverter for the Train Propulsion System (철도차량 추진시스템을 위한 FLI(Five-leg Inverter)의 성능 분석)

  • Lim, Young-Seol;Shin, Duck-Ho;Lee, June-Seok;Lee, Kyo-Beum
    • Journal of the Korean Society for Railway
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    • v.20 no.1
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    • pp.43-54
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    • 2017
  • This paper analyzes the performance of two three-leg inverters and a five-leg inverter and proposes the optimal operation conditions in applying the five-leg inverter for the train propulsion system. The five-leg inverter offers a saving of two switches compared with the standard two three-leg inverters and it is possible to control two three-phase motors independently by using a control board. All of these features lead to a potential reduction in capital cost and miniaturization of system. In this paper, first, the analysis of the existing motor control method and PWM method for two-traction motor drive of urban railway is implemented. Next, the operation principle and performance of five-leg inverter is introduced. Through the analysis, when it applies the same motor control method and the same PWM method for three-leg inverter and five-leg inverter, the characteristic of motor's speed and torque is compared.

A Novel Model Predictive Control for Five-leg Inverter Supplying Two Induction Motors (5-레그 인버터를 위한 새로운 모델 예측 제어 기법)

  • Lim, Young-Seol;Lee, June-Seok;Lee, Kyo-Beum
    • Proceedings of the KIPE Conference
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    • 2018.07a
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    • pp.402-403
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    • 2018
  • 본 논문에서는 5-레그 인버터(Five-leg Inverter)를 이용하여 2대의 유도전동기를 구동하는 시스템의 모델 예측 제어 기법을 제안한다. 기존 모델 예측 제어 기법인 FS-MPC(Full-Set MPC)는 5-레그 인버터에서 가능한 32가지의 모든 스위칭 상태를 고려하기 때문에 제어 성능은 뛰어나지만 계산량이 많아지는 단점이 있다. 본 논문에서는 FS-MPC보다 제어 성능의 저하를 최소화하고 계산량은 현저히 감소시킨 모델 예측 제어 기법을 제안하며 시뮬레이션을 통해 제안하는 기법의 성능 및 타당성 검증을 검증한다.

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