• Title/Summary/Keyword: voltage boost

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A Study on Boost Type Single-Phase Inverter System for Compensation of Voltage Sag (Voltage Sag 보상을 위한 승압형 단상 인버터 시스템에 관한 연구)

  • Seo, Young-Min;Lee, Seung-Yong;Hong, Soon-Chan
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.25 no.11
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    • pp.50-57
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    • 2011
  • This paper proposes a boost type single-phase inverter system to compensate the voltage sag appeared on source side. The proposed system is composed of a boost converter, a PWM inverter, and a bypass diode. If the voltage sag has appeared in input voltage, the boost converter would be operated to compensate it in the proposed system. The boost converter would not be operated when the magnitude of input voltage is more than 0.9 pu. The output voltage is kept constant by a direct-quadrature frame controller in the inverter. A 300 W class boost type inverter system was simulated, and the validity of the proposed system was verified by carrying out experiments.

A New Z-Source Inverter Topology with High Voltage Boost Ability

  • Trinh, Quoc-Nam;Lee, Hong-Hee
    • Journal of Electrical Engineering and Technology
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    • v.7 no.5
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    • pp.714-723
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    • 2012
  • A new Z-source inverter (ZSI) topology is developed to improve voltage boost ability. The proposed topology is modified from the switched inductor topology by adding some more inductors and diodes into inductor branch to the conventional Z-source network. The modulation methods developed for the conventional ZSI can be easily utilized in the proposed ZSI. The proposed ZSI has an ability to obtain a higher voltage boost ratio compared with the conventional ZSI under the same shoot-through duty ratio. Since a smaller shoot-through duty ratio is required for high voltage boost, the proposed ZSI is able to reduce the voltage stress on Z-source capacitor and inverter-bridge. Theoretical analysis and operating principle of the proposed topology are explicitly described. In addition, the design guideline of the proposed Z-source network as well as the PWM control method to achieve the desired voltage boost factor is also analyzed in detail. The improved performances are validated by both simulation and experiment.

A High-Gain Boost Converter using Voltage-Stacking Cell (Voltage-Stacking Cell을 이용한 고이득 부스트 컨버터)

  • Lee, Jun-Young;Hwang, Sun-Nam
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.6
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    • pp.982-984
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    • 2008
  • This paper suggests anon-isolated high-gain boost converter using voltage-stacking cell. The voltage gain can be increased by adjusting number of voltage-stacking cells and transformer turns-ratio. Test results with 1kW prototype converter show that the voltage gain is three or four times higher than conventional boost converter at unity transformer turns-ratio and about 90% of efficiency is recorded under full load condition.

A High Voltage, High Side Current Sensing Boost Converter

  • Choi, Moonho;Kim, Jaewoon
    • Proceedings of the KIPE Conference
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    • 2013.07a
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    • pp.36-37
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    • 2013
  • This paper presents high voltage operation sensing boost converter with high side current. Proposed topology has three functions which are high voltage driving, high side current sensing and low voltage boost controller. High voltage gate driving block provides LED dimming function and switch function such as a load switch of LED driver. To protect abnormal fault and burn out of LED bar, it is applied high side current sensing method with high voltage driver. This proposed configuration of boost converter shows the effectiveness capability to LED driver through measurement results.

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A Buck-Boost Type Charger with a Switched Capacitor Circuit

  • Wu, Jinn-Chang;Jou, Hurng-Liahng;Tsai, Jie-Hao
    • Journal of Power Electronics
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    • v.15 no.1
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    • pp.31-38
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    • 2015
  • In this paper, a buck-boost type battery charger is developed for charging battery set with a lower voltage. This battery charger is configured by a rectifier circuit, an integrated boost/buck power converter and a switched capacitors circuit. A boost power converter and a buck power converter sharing a common power electronic switch are integrated to form the integrated boost/buck power converter. By controlling the common power electronic switch, the battery charger performs a hybrid constant-current/constant-voltage charging method and gets a high input power factor. Accordingly, both the power circuit and the control circuit of the developed battery charger are simplified. The switched capacitors circuit is applied to be the output of the boost converter and the input of the buck converter. The switched capacitors circuit can change its voltage according to the utility voltage so as to reduce the step-up voltage gain of the boost converter when the utility voltage is small. Hence, the power efficiency of a buck-boost type battery charger can be improved. Moreover, the step-down voltage gain of the buck power converter is reduced to increase the controllable range of the duty ratio for the common power electronic switch. A prototype is developed and tested to verify the performance of the proposed battery charger.

Analysis of Parallel-Input Series-Output(PISO) Boost Converter With Output Voltage Balancing Characteristic (병렬입력/직렬출력(PISO) 부스트 컨버터의 출력 전압 밸런싱 특성 해석)

  • Nam, Hyun-Taek;Cha, Honnyong;Kim, Heung-Geun
    • The Transactions of the Korean Institute of Power Electronics
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    • v.23 no.1
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    • pp.40-46
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    • 2018
  • In this study, the output voltage balancing characteristics of parallel-input series-output (PISO) boost converter is analyzed. The PISO boost converter is derived by combining two basic boost converters. In comparison with the conventional three-level boost converter, the PISO boost converter can balance the output voltages under an unbalanced load condition without requiring additional circuit components and control strategy. A 2 kW prototype converter is built and tested to verify the output voltage balancing characteristics of the PISO boost converter.

High Boost Converter Using Voltage Multiplier (배압회로를 이용한 고승압 컨버터)

  • Baek Ju-Won;Kim Jong-Hyun;Ryoo Myung-Hyo;Yoo Dong-Wook;Kim Jong-Soo
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.55 no.8
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    • pp.416-422
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    • 2006
  • With the increasing demand for renewable energy, distributed power included in fuel cells have been studied and developed as a future energy source. For this system, a power conversion circuit is necessary to interface the generated power to the utility. In many cases, a high step-up dc/dc converter is needed to boost low input voltage to high voltage output. Conventional methods using cascade dc/dc converters cause extra complexity and higher cost. The conventional topologies to get high output voltage use flyback dc/dc converters. They have the leakage components that cause stress and loss of energy that results in low efficiency. This paper presents a high boost converter with a voltage multiplier and a coupled inductor. The secondary voltage of the coupled inductor is rectified using a voltage multiplier and series-connected with the boost voltage of primary voltage of the coupled inductor. Therefore, high boost voltage is obtained with low duty cycle. Theoretical analysis and experimental results verify the proposed solutions using a 300W prototype.

A Non-Isolated 3-Level High Step-Up Boost Converter With Output Voltage Balancing (출력 전압 밸런싱 기능을 가진 비절연형 3-레벨 고승압 부스트 컨버터)

  • Yun, Song-Hyun;Kang, Hyemin;Cha, Honnyong;Kim, Heung-Geun
    • The Transactions of the Korean Institute of Power Electronics
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    • v.20 no.5
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    • pp.464-470
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    • 2015
  • In this paper, a non-isolated three-level high step-up boost converter with output voltage balancing is proposed. By adding one extra inductor to the conventional three-level boost converter, the proposed converter is derived. Compared with the traditional boost converter and the three-level boost converter, the proposed converter can obtain very high voltage conversion ratio, and the voltage and current stress of switching devices and diodes are reduced. A 2.7 kW prototype converter is built and tested to verify performances of the proposed converter.

Design and Implementation of Low Cost Boost Type Single-Phase Inverter System for Compensation of Voltage Sag (순간전압강하 보상을 위한 저가의 승압형 단상 인버터 시스템의 설계 및 구현)

  • Lee, Seung-Yong;Hong, Soon-Chan
    • The Transactions of the Korean Institute of Power Electronics
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    • v.17 no.1
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    • pp.85-92
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    • 2012
  • In this paper, a 300[W] class boost type single-phase inverter system which can compensate voltage sag on source side is designed and implemented. This system is a two-stage conversion system composed of a boost converter and a PWM inverter. If the voltage sag has appeared at the point of common coupling, the boost converter would be operated to compensate it. The boost converter and the inverter were constructed on single smart power module(SPM) to implement low cost system. The system is designed for that the THD of output voltage is below 5[%]. Finally, the validity of the design for the inverter system is verified by both simulations and experiments.

A Novel Active Boost Power Converter for single phase SRM (단상 SRM 구동을 위한 새로운 능동 부스트 전력 컨버터)

  • Seok, Seung-Hun;Liang, Jianing;Lee, Dong-Heeㅋ;Ahn, Jin-Woo
    • Proceedings of the KIPE Conference
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    • 2008.06a
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    • pp.277-279
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    • 2008
  • In this paper, a novel active boost converter for SR drive is proposed. An active capacitor circuit is added in the front-end. Based on this active capacitor network, when boost switch turns off, this network seems as passive capacitor network. And the voltage of boost capacitor can keep balance with dc-link voltage automatically. In the capacitor network, discharging voltage is general dc-link voltage in parallel-connected capacitors; charging voltage is double dc-link voltage in series-connected capacitors. When boost switch turns on, two capacitors are connected in series, and discharging voltage is up to double dc-link voltage. So the fast excitation current can be obtained from this mode. Profit from fast excitation and fast demagnetization mode, the performance and output power can be improved. Some computer simulations are done to verify the performance of proposed converter.

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