• Title/Summary/Keyword: multi-level PWM inverter

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Multi-level PWM Inverter Considering the number of Output Voltage level and Current rating (출력전압 레벨 수와 전류정격을 고려한 PWM 다중레벨 인버터)

  • Park, N.S.;Seo, J.J.;Park, S.J.;Kim, K.H.;Cho, S.E.;Kim, C.U.
    • Proceedings of the KIPE Conference
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    • 2005.07a
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    • pp.659-662
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    • 2005
  • In this paper, we proposed the novel hybrid multi-level inverter using combination of the output voltage of transformers to reduce the THD(Total Harmonic Distortion) and improve the waveform of output voltage. The proposed multi-level inverter used the output of transformer which is 1times, 2times, 4times of input of the transformers. So we increased the output voltage from the reduce the number of switching component and transformer. Also, we tested the proposed prototype 15-level inverter to clarify the proposed electric circuit and reasonableness of control signal for the proposed multi -level PWM inverter.

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Novel Multi-Level PWM Inverter Using The Common Arm (공통암을 이용한 새로운 다중레벨 PWM 인버터)

  • .Song S.G;Yu tao;Lee S.H.;Cho S.E.;Moon C.J.;Kim C.U;Park S.J.
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.54 no.4
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    • pp.195-200
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    • 2005
  • In this paper, we proposed the electric circuit using one common arm of H-Bridge Inverters to reduce the number of switching component in multi-level inverter combined with H-Bridge Inverters and Transformers. and furthermore we suggested the new multi-level PWM inverter using PWM level to reduce THD(Total Harmonic Distortion). and we used the switching method that can be same rate of usage at each transformer. Also, we tested the proposed prototype 9-level inverter to clarify the proposed electric circuit and reasonableness of control signal for the proposed multi-level PWM inverter.

The Simple Harmonic Analysis Method of the Multi-Carrier PWM Techniques by Using the Output Phase Voltage in the Multi-Level Inverter (출력 상전압을 이용한 멀티-캐리어 PWM 기법의 간단한 고조파 분석 방법)

  • 김준성;김태진;강대욱;현동석
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.52 no.7
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    • pp.352-360
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    • 2003
  • This paper deals with a simple method in order to analyze and compare the harmonic characteristics in the multi-level inverter. Generally, the magnitude of harmonic components becomes different according to the multi-carrier Pulse Width Modulation(PWM) techniques, the modulation index($M_i$) and the switching frequency The previous papers analyzed the harmonic characteristics from the viewpoint of the space voltage vector. Hence, the calculation of the harmonic vector becomes more difficult and complex in 4-level or over 5-level. However, the proposed method has reduced an amount of calculation and simplified the process of it, using the relationship between the reference voltage and the output phase voltage to the load neutral point. It is applied to the 5-level cascade inverter and the harmonic characteristics for each multi-carrier PWM technique are compared through the simulation.

THD Reduction by Using HBML-PWM Hybrid Type Inverter (HBML-PWM 혼용 인버터를 이용한 THD 저감)

  • Yi, Tao;Moon, C.J.;Song, S.G.;Park, S.J.;Cho, S.E.;Kim, J.D.
    • Proceedings of the KIPE Conference
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    • 2005.07a
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    • pp.655-658
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    • 2005
  • In this paper, we proposed the electric circuit using one common arm of H-Bridge Inverters to reduce the number of switching component in multi-level inverter combined with H-Bridge Inverters and Transformers. and furthermore we suggested the new multi-level PWU inverter using PWM level to reduce THD(Total Harmonic Distortion). and we used the switching method that can be same rate of usage at each transformer. Also, we tested the proposed prototype 9-level inverter to clarify the proposed electric circuit and reasonableness of control signal for the proposed multi-level PWM inverter.

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The study of New multi-level inverter with simple structure (간단한 구조를 갖는 새로운 방식의 멀티 레벨 인버터에 관한 연구)

  • Lee, Byung-Jin;Jung, Byung-Chang;Ru, Chul-Ro;Lee, Seong-Ryong;Han, Woo-Yong
    • Proceedings of the KIEE Conference
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    • 1998.07f
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    • pp.1963-1965
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    • 1998
  • In this paper, a new simplified configuration for a multi-level PWM inverter is proposed. The proposed inverter consists of an auxiliary circuit with one switching device, and 3 phase full-bridge inverter. The proposed inverter, in spite of reduction of the switching devices, offers characteristics similar to the NPC(Neutral - point - clamped)- PWM inverter. Also, since the reduction of the switching devices, the control strategy is simplified. And switching loss is reduced. In addition to, it is possible that reliable DC level voltage than former multi-level inverter. And load power application is same to conventional NPC-PWM inverter. The performance of the system is verified by simulation. In this paper, show the simulation result of the single phase full bridge inverter application.

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Low Frequency Multi-Level Switching Strategy Based on Phase-Shift Control Methods

  • Lee, Sang-Hun;Song, Sung-Geon;Park, Sung-Jun
    • Journal of international Conference on Electrical Machines and Systems
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    • v.1 no.3
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    • pp.366-371
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    • 2012
  • In this paper, we propose an electric circuit using one common-arm of H-Bridge inverters to reduce the number of switching components in the multi-level inverter combined with H-Bridge inverters and transformers. And furthermore, we suggested a new multi-level PWM inverter using PWM level to reduce THD (Total Harmonic Distortion). We use a phase-shift switching method that has the same rate of usage at each transformer. Also, we test the proposed prototype 9-level inverter to clarify the proposed electric circuit and reasonableness of the control signal for the proposed multi-level PWM inverter.

Switching Frequency Reducing Method of Multi-level Inverter Using Phase Shift Control (상신호 변위기법을 이용한 다중레벨 인버터의 스위칭주파수 저감기법)

  • Park, Noh-Sik;Song, Sung-Geun;Park, Sung-Jun;Nam, Hae-Kon;Kang, Feel-Soon;Kim, Cheul-U
    • Proceedings of the KIEE Conference
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    • 2005.07b
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    • pp.1477-1479
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    • 2005
  • In this paper, we proposed the electric circuit using one common arm of H-Bridge inverters to reduce the number of switching component in multi-level inverter combined with H-Bridge Inverters and Transformers. and furthermore we suggested the new multi-level PWM inverter using PWM level to reduce THD(Total Harmonic Distortion) and we used the switching method that can be same rate of usage at each transformer. Also, we tested the proposed prototype 15-level inverter to clarify the proposed electric circuit and reasonableness of control signal for the proposed multi-level PWM inverter.

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Implementation of an FPGA-based Multi-Carrier PWM Techniques for Multilevel Inverter (FPGA기반 멀티레벨 인버터의 다중 반송신호 PWM 기법 구현)

  • Chun, Tae-Won;Lee, Hong-Hee;Kim, Heung-Geun;Nho, Eui-Cheol
    • The Transactions of the Korean Institute of Power Electronics
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    • v.15 no.4
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    • pp.288-295
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    • 2010
  • Multi-level inverters have drawn much of attention in recent years because it can meet the demand of high power applications and good power quality associated with reduced harmonic distortion. As the number of voltage level increases, field programmable gate arrays (FPGAs) are suitable for the implementation of multi-level modulation algorithm. This paper proposes the implementation method for generating PWM pulses at the three phase diode clamped five-level inverter using FPGA. The strategy for communicating stably the data of three-phase reference voltages between the DSP and FPGA is suggested. The techniques for generating PWM signals based on a multi-carrier modulation method are carried out through the experiments with 32-bit DSP and Cyclone-III FPGA.

Low frequency Multi-level Switching Strategy based on Phase-Shift Control (위상 변위제어기법을 이용한 저주파 다중레벨 스위칭 방식)

  • Yu, Tao;Moon, C.J.;Park, S.J.;Nam, H.K.;Kwon, S.J.
    • Proceedings of the KIPE Conference
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    • 2005.07a
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    • pp.673-676
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    • 2005
  • In this paper, we proposed the electric circuit using one common arm of H-Bridge Inverters to reduce the number of switching component in multi-level inverter combined with H-Bridge Inverters and Transformers. and furthermore we suggested the new multi-level PWM inverter using PWM level to reduce THD(Total Harmonic Distortion). and we used the switching method that can be same rate of usage at each transformer. Also, we tested the proposed prototype 9-level inverter to clarify the proposed electric circuit and reasonableness of control signal for the proposed multi-level PWM inverter.

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A Novel Method of the Harmonic Analysis by Using the Multi-Carrier PWM Techniques in the Multi-Level Inverter (멀티 레벨 인버터에서 멀티 캐리어 PWM 방법을 사용한 고조파 분석의 새로운 방법)

  • Kim June-Sung;Kim Tae-Jin;Kang Dae-Wook;Hyun Dong-Seok
    • Proceedings of the KIPE Conference
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    • 2002.11a
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    • pp.171-174
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    • 2002
  • This paper deals with a novel method in order to analyze the harmonic characteristics in the multi-level inverter. Generally, the magnitude of harmonic components is different according to the carrier PWM techniques, modulation Index(Mi), and the level of multi-level inverter The previous papers analyzed the harmonic characteristics from the viewpoint of the space vector. Hence, the calculation of the harmonic vector becomes difficult and complex in 4-level or more than S-level. However, the proposed method of this paper reduced an amount of calculation and simplified the process of calculation by using the relationship between reference voltage and output phase voltage to load neutral. This paper analyzed the harmonic and it is applied to the multi-carrier PWM techniques in 5- level and other-level of cascaded inverter system.

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