[논문]3-레벨 T-형 및 NPC 인버터의 전력 손실 비교 분석

알레미파얌; 이동춘

doi:10.6113/tkpe.2014.19.2.173

3-레벨 T-형 및 NPC 인버터의 전력 손실 비교 분석
Comparative Analysis of Power Losses for Three-Level T-Type and NPC PWM Inverters 원문보기

전력전자학회 논문지 = The Transactions of the Korean Institute of Power Electronics, v.19 no.2, 2014년, pp.173 - 183

알레미파얌 (Dept. of Electrical Eng., Yeungnam University) , 이동춘 (Dept. of Electrical Eng., Yeungnam University)

Abstract ▼ AI-Helper

In this paper, an analysis of power losses for the three-level T-type and neutral-point clamped (NPC) PWM inverters is presented, in which the conduction and switching losses of semiconductor devices of the inverters are taken into account. In the inverter operation, the conduction loss depends on the modulation index (MI) and power factor (PF), whereas the switching loss depends on the switching frequency. Power losses for the T-type and NPC inverters are analyzed and calculated at the different operating points of MI, PF and the switching frequency, in which the four different models of semiconductor devices are adopted. In the case of lower MI, the NPC-type is more efficient than the T-type, and vice versa. The validity of the power loss analysis has been verified by the simulation results.

주제어

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문제 정의

This paper presents an evaluation of power losses for the three-level T-type and NPC inverters, in which the four different models of semiconductor devices are adopted. The conduction and switching losses for the two types of inverters are analyzed and compared, which shows that in the case of unity modulation index, up to the medium range of switching frequency (8kHz <f_s< 20kHz), the power losses of the T-type inverter is lower than that of the NPC one.

제안 방법

The analysis results of the power loss are verified by the simulation. In the simulation, the on-resistance and the on/off-switching times are needed to model the conduction and switching loss of IGBTs. The power loss is calculated by the difference of the measured input and output power of inverter.

대상 데이터

The main advantage of the T-type topology is the reduced switching losses since the commutation voltage of devices in the leg is only a half compared with that of the two-level inverter ^[5]. The circuit consists of twelve IGBTs (six 1200-V IGBTs in the leg and six 600-V IGBTs in the crossbar) and twelve anti-parallel diodes. In the T-type inverter, the number of conducted switches in the active current pass is similar to the two-level inverter, which is doubled in the NPC three-level inverter.

참고문헌 (20)

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상세보기
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상세보기
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상세보기
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상세보기
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상세보기
Eupec-Infineon IGBT/ Diode module data sheets. Online. Available: www.infineon.com/eupc.
Microsemi IGBT/ Diode module data sheets. Online. Available: www.microsemi.com/
Semikron IGBT/ Diode module data sheets. Online. Available: www.semikron.com.
Fuji electric IGBT/ Diode module data sheets. Online. Available: www.fujielectric.com.

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