• Title/Summary/Keyword: 3 Phase AC-DC Boost Converter

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DSP-based Current Programmed Control of Three Phase PWM AC-AC Boost Converter (3상 PWM AC-AC 부스트 컨버터의 DSP 기반 전류 프로그램 제어)

  • Choi Nam-Sup;Li Yulong
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.55 no.1
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    • pp.27-32
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    • 2006
  • In this paper, a new scheme of current programmed control for three phase PWM AC-AC converter is presented. Compared to duty-ratio voltage control, current programmed control has several advantages such as reduction of system order, inherent current protection and robust output. By considering only the magnitude components, a similar scheme in the DC-DC converter can be extended to the three phase PWM AC-AC converter. The proposed current programmed control will be well adopted into various converter topologies though three phase PWM AC-AC boost converter is treated as an example. The converter analysis is carried out by applying the vector DQ transformation to obtain physical insight into the converter operation and to establish some important characteristic equations for control purpose. The experiment results show the validity of the proposed scheme.

A Study on Excitation System for Synchronous Generator Using Two State Three Phase PWM AC/DC Converter (2단 3상 PWM AC/DC 컨버터를 이용한 동기발전기 여자제어시스템)

  • Lee, Sang-Hun;Lee, Dong-Hee;Ahn, Jin-Woo
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.21 no.3
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    • pp.96-106
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    • 2007
  • The terminal voltage of a synchronous generator is maintained by the field current control of excitation system. Generally AC/DC converter which is component of AVR(Automatic Voltage Regulator) system for excitation current control is connected to diode rectifier and DC/DC converter system. In the case of diode rectifier system of phase controlled converter as AC/DC converter have low power factor and harmonics of lower order in the line current. In this paper, two stage three phase PWM AC/DC converter is studied to solve these problems. The characteristics of a proposed converter reduces the harmonics and reactive power of the distribution line and has fast dynamic response in transient period using boost converter and current control mode buck converts. The proposed method is verified by the computer simulation and experimental results in prototype generation system.

Current Sensorless Three Phase PWM AC/DC Boost Converter with Unity Power Factor (전류센서리스 단위역률 3상 PWM AC/DC Boost 컨버터)

  • 천창근;김철우
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.17 no.6
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    • pp.105-112
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    • 2003
  • Diode rectifier which can't be controlled output voltage and phase control converter as AC/DC converter have low power factor and harmonics of lower order in the line current. In this paper, three phase PWM(Pulse Width Modulation) AC/DC boost converter is studied to solve these problems. The characteristics of a proposed converter are to control the phase of current without current sensor as a very simple control algorithm using circuit parameters only and to apply sinusoidal PWM method with fixed switching frequency due to a difficult design of input filter and switching device. We simulate for the proposed algorithm that high power factor is achieved and DC link voltage has fast dynamic response without ripple in rectifying and regenerating operation. As a result of experiment with circuit parameter(inductor, capacitor) decided in simulation, the proposed converter had high power factor and reduction of low order harmonics as against diode rectifier.

Analysis of Step-up AC/DC Converter (승압형 AC/DC 전력 변환기의 해석)

  • Park, S.Y.;Park, I.G.;Kang, Y.S.;Park, J.K.
    • Proceedings of the KIEE Conference
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    • 1990.11a
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    • pp.340-343
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    • 1990
  • Recently, Power Electronics system increase makes harmonics and low input power factor problem. In this paper present new analysis method of PWM Boost AC/DC Converter. This PWM AC/DC Converter is capability of unity power factor, control of DC side voltage level, generation, and near sinusoidal current in 3-phase line. The control of this type of converter is widely discussed. And this paper propose new phase convert function and analysis in steady state of system to obtain amplitude and phaser of switching function. This switching function is general solution and it can use in high power approach. And this control method show the clear meaning of control variable. This paper propose new analysis method of Boost AC/DC Converter of steady state and 3-phase 2KW experimental system show its validity.

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A Low COST SOFT-SWITCHED AC-TO-TC CONVERTER

  • 최주엽;목형수;김택용
    • Proceedings of the KIPE Conference
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    • 1997.07a
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    • pp.135-140
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    • 1997
  • A highly efficient single-phase/three-phase compatible ac-to-dc converter is proposed and analyzed, which includes three identical single-phase both soft-switched dc-to-dc converter with boost converter as a pre-regulator for input power factor correction (PFC). The proposed converter structure provides a cost reduction and easy implementation of compatibility between single-phase 220V and three-phase 220V/380V with their inputs in delta or wye connections.

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Circuit Topology and Characteristics of Three Phase PWM Noninverting Buck-Boost AC-AC Converter (3상 PWM 비반번 Buck-Boost AC-AC 컨버터의 회로구성과 특성)

  • Choi, Nam-Sup
    • Proceedings of the KIPE Conference
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    • 2005.07a
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    • pp.116-118
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    • 2005
  • In this paper, a three phase PWM noninverting Buck-Boost AC-AC converter for WCF applications is presented. The PWM noninverting Buck-Boost AC-AC converter is modelled by using vector DQ transformation whereby the basic DC characteristics equation is analytically obtained. Finally, the PSIM simulation shows the validity of the modelling and analysis.

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An Efficient Battery Charging Algorithm based on State-of-Charge Estimation using 3-Phase AC-DC Boost Converter (3상 AC-DC 승압형 컨버터를 이용한 SOC 추정 기반의 효율적 배터리 충전 알고리즘)

  • Lee, Jung-Hyo;Won, Chung-Yuen
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.29 no.9
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    • pp.96-102
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    • 2015
  • This paper presents battery charging method using 3-phase AC-DC boost converter. General battery charging method is that charging the battery voltage to the reference voltage according to the constant current(CC) control, when it reaches the reference voltage, charging the battery fully according to the constant voltage(CV) control. However, battery chaging time is increased because of the battery impedance, constant current charging section which shoud take the large amount of charge is narrow, and constant voltage charging section which can generate insufficient charge is widen. To improve this problem, we proposes the method to reduce the charging time according to the SOC(State of Charge) estimation using battery impedance.

Novel Modular 3-phase AC-DC Flyback Converter for Telecommunication

  • Choi Ju-Yeop;Lee J.P.;Kim T.Y.
    • Proceedings of the KIPE Conference
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    • 2001.10a
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    • pp.314-320
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    • 2001
  • A novel mode of parallel operation of a modular 3-phase AC-DC flyback converter for power factor correction along with tight regulation was recently analyzed and presented. The advantage of the proposed converter does not require expensive high voltage and high current devices that are normally needed in popular boost type 3-phase converter. In this paper the detailed small signal analysis of the modular 3-phase AC-DC flyback converter is provided for control purposes and also experimental results are included to confirm the validity of the analysis.

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A Quasi Z-Source AC-AC Converter with a Low DC Voltage Distribution Capability Operating as a Power Electronic Transformer (전력전자 변압기로 동작하는 저전압 직류배전 기능을 갖는 Quasi Z-소스 AC-AC 컨버터)

  • Yoo, Dae-Hyun;Oum, Jun-Hyun;Jung, Young-Gook;Lim, Young-Cheol
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.63 no.3
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    • pp.358-366
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    • 2014
  • This paper proposes a quasi Z-source AC-AC converter with the low DC voltage distribution capability operating as a power electronic transformer. The proposed system has configuration that the input terminals of two quasi Z-source AC-AC converters are connected in parallel, also their output terminal are connected in series. Simple control method of duty ratio was proposed for the in phase buck-boost AC voltage mode and the DC output voltage control. DSP based experiment and PSIM simulation were performed. As a result, the PSIM simulation results were same with the measured results. By controlling the duty ratio under the condition of 100 [${\Omega}$] load, quasi Z-source AC-AC converter could buck and boost the AC output voltage in phase with the AC input voltage, and the same time, the constant DC voltage could be output without affecting the AC output characteristics. And, the DC output voltage 48[V] was constantly controlled in dynamic state in case while the load is suddenly changed ($50[\Omega]{\rightarrow}100[\Omega]$). From the above result, we could know that the quasi Z-source AC-AC converter can act as a power electronic transformer with a low DC voltage distribution capability.

A Study on Solar Cell Output Voltage Control for 3-Phase Utility Interactive Photovoltaic System (3상 계통연계형 태양광발전시스템의 태양전지 출력단 전압제어에 관한 연구)

  • Nam J. H.;Kang B. H.;Gho J. S.;Choe G. H.;Shin W. S.
    • Proceedings of the KIPE Conference
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    • 2002.07a
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    • pp.571-575
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    • 2002
  • Generation of electrical energy faces many problems today. Solar power converters were used to convert the electrical energy from the solar arrays to a stable and reliable power source. The object of this paper is to analyze and design DC-DC converters in a solar energy system to investigate the performance of the converters. A DC-DC converter can be commonly used to control the power flow from solar cell to load and to achieve maximum power point tracking(MPPT), DC-AC converter can also be used to modulate the DC power to AC power being applied on common utility load. A DC-DC converter is used to boost the solar cell voltage to constant 360(V) DC link and to ensure operation at the maximum power point tracking, If a wide input voltage range has to be covered a boost converter is required. In this paper, author described that simulation and experimental results of PV system contain solar modules, a DC-DC converter(boost type chopper), a DC-AC converter (3-phase inverter) and resistive loads.

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