• Title, Summary, Keyword: Maximum transferred power point

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Design of a Triple-input Energy Harvesting Circuit with MPPT Control (MPPT 제어기능을 갖는 삼중입력 에너지 하베스팅 회로 설계)

  • Yoon, Eun-Jung;Park, Jong-Tae;Yu, Chong-Gun
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.346-349
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    • 2013
  • This paper describes a triple-input energy harvesting circuit using solar, vibration and thermoelectric energy with MPPT(Maximum Power Point Tracking) control. The designed circuit employs MPPT control to harvest maximum power available from a solar cell, PZT vibration element and thermoelectric generator. The harvested energies are simultaneously combined and stored in a storage capacitor, and then managed and transferred into a sensor node by PMU(Power Management Unit). MPPT controls are implemented using the linear relation between the open-circuit voltage of an energy transducer and its MPP(Maximum Power Point) voltage. The proposed circuit is designed in a CMOS 0.18um technology and its functionality has been verified through extensive simulations. The designed chip occupies $945{\mu}m{\times}995{\mu}m$.

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A New Maximum Inductive Power Transmission Capacity Tracking Method

  • Ameri, Mohammad Hassan;Varjani, Ali Yazdian;Mohamadian, Mustafa
    • Journal of Power Electronics
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    • v.16 no.6
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    • pp.2202-2211
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    • 2016
  • In certain applications, such as IPT-based EV charger (IPTEC), any variation in alignment and distance between pickup and charger primary leads to a change in leakage and magnetic impedance magnitudes. The power transmission capacity is not always at the maximum level because of these variations. This study proposes a new low-cost tracking method that achieves the Maximum Inductive Power Transmission Capacity (MIPTC). Furthermore, in the proposed method, the exchange of information between load and source is not required. For an application such as IPTEC, the load detected by the IPTEC varies continuously with time because of the change in state of the charge. This load variation causes a significant variation in IPT resonant circuit voltage gain. However, the optimized charging output voltage should be kept constant. From the analysis of the behavior of the IPT circuit at different working frequencies and load conditions, a MIPTC operation point that is independent of load condition can be identified. Finally, the experimental results of a developed prototype IPT circuit test show the performance of the proposed method.

High Efficiency Lossless Snubber for Photovoltaic Maximum Power Point Tracker (태양광 최대 전력 추종기를 위한 고효율 무손실 스너버)

  • Jang, Du-Hee;Kang, Jeong-Il;Han, Sang-Kyoo
    • The Transactions of the Korean Institute of Power Electronics
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    • v.18 no.5
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    • pp.485-491
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    • 2013
  • A new passive lossless snubber for boost converter based on magnetic coupling is proposed. It is composed of a winding coupled with boost inductor, one snubber inductor, two snubber capacitor and three additional diodes. Especially, the snubber inductor can not only limit the reverse recovery current of output diode but also minimize switch turn-on losses greatly. Moreover, all of the energy stored in the snubber is transferred to the load in the manner of resonance. To confirm the validity of proposed system, theoretical analysis, design consideration, and verification of experimental results are presented.

Design of an Energy Harvesting Circuit Using Solar and Vibration Energy with MPPT Control (MPPT 제어기능을 갖는 빛과 진동 에너지를 이용한 에너지 하베스팅 회로 설계)

  • Yoon, Eun-Jung;Hwang, In-Ho;Park, Jong-Tae;Yu, Chong-Gun
    • Journal of IKEEE
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    • v.16 no.3
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    • pp.224-234
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    • 2012
  • This paper describes an energy harvesting circuit using solar and vibration energy with MPPT(Maximum Power Point Tracking) control for micro sensor nodes. The designed circuit employs MPPT control to harvest maximum power available from a PZT vibration element and an integrated solar cell. The harvested energies are simultaneously combined and stored in a storage capacitor, and then managed and transferred into sensor node by PMU(Power Management Unit). MPPT controls are implemented using the linear relationship between the open-circuit voltage of an energy transducer and its MPP(Maximum Power Point) voltage. The proposed circuit is designed in a CMOS 0.18um technology and its functionality has been verified through extensive simulations. The designed energy harvesting circuit and integrated solar cell occupy $2.85mm^2$ and $8mm^2$ respectively.

An Improved MPPT Converter with Current Compensateion Method for Small Scaled PV-Applications (소규로 태양광 발전시스템을 위한 전류보상기법을 갖는 향상된 MPP 추적 컨버터)

  • Noh Hyeong-Ju;Lee Dong-Yun;Hyun Dong-Seok
    • Proceedings of the KIPE Conference
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    • pp.580-583
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    • 2002
  • An improved MPPT converter with current compensation method for small-scaled PV-applications is presented in this paper. The proposed method implements maximum power point tracking (MPPT) by variable reference current which is continuously changed during one sampling period. Therefore, the power transferred to the load is increased above $9\%$ by the proposed MPPT converter with current compensation method. As a result, the utilization efficiency of Photovoltaic (PV)-panel can be increased. In addition, as it doesn't use digital signal processor (DSP), this MPPT method has the merits of both a cost efficiency and a simple control circuit design. Therefore, it is considered that the proposed MPPT method is proper to low power, low cost PV-applications. The concept and control principles of the proposed MPPT method are explained in detail and its validity of the proposed method is verified through several simulated results.

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An Improved MPPT Converter with Current Compensation Method for Small Scaled PV-Applications (소규모 태양광 발전시스템을 위한 전류보상기법을 갖는 향상된 MPP 추적 컨버터)

  • 이동윤;노형주;현동석
    • The Transactions of the Korean Institute of Power Electronics
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    • v.8 no.2
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    • pp.143-150
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    • 2003
  • An improved MPPT converter with current compensation method for small-scaled PV-applications is presented in this paper. The proposed method implements maximum power point tracking (MPPT) by variable reference current which is continuously changed during one sampling period. Therefore, the Power transferred to the load is increased above 9% by the proposed MPPT converter with current compensation method. As a result, the utilization efficiency of Photovoltaic (PV)-panel can be increased. In addition, as it doesn't use digital signal processor (DSP), this MPPT method has the merits of both a cost efficiency and a simple control circuit design. Therefore, it is considered that the proposed MPPT method is proper to low power, low cost PV-applications. The concept and control principles of the proposed Un moth()d are explained in detail and its validity of the proposed method is verified through several simulated results.

A Micro-Scale Photovoltaic Energy Harvesting Circuit Using Energy Distribution Technique (에너지 분배 기능을 이용한 마이크로 빛에너지 하베스팅 회로)

  • Lee, Shin-woong;Lee, Chul-woo;Yang, Min-Jae;Yoon, Eun-jung;Yu, Chong-gun
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.581-584
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    • 2014
  • In this paper, a micro-scale photovoltaic(PV) energy harvesting system is proposed where an MPPT(Maximum Power Point Tracking) control is implemented using an energy distribution technique. Miniature PV cells output very low energy and low voltages, and thus, they cannot be used to directly power the MPPT controller. In the proposed system, a start-up circuit boosts an internal Vcp, and the boosted Vcp is used to operate the internal MPPT control block. When the Vcp reaches a predefined value, a detector circuit makes the start-up block turn off and provide a power converter with the energy from the PV cell. When the Vcp decreases such that the MPPT controller can not be operated, the energy transferred to the power converter is blocked and the start-up circuit is reactivated. In this way, the MPPT function is achieved by alternately operating the start-up circuit and the power converter using the energy distribution technique, and the harvested energy is transferred to a load through a PMU(Power Management Unit). The proposed circuit is designed in a 0.35um CMOS process and its functionality has been verified through extensive simulations. The designed chip area including pads is $1430um{\times}1110um$.

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An Interference Isolation Method for Wireless Power and Signal Parallel Transmissions on CPT Systems

  • Zhou, Wei;Su, Yu-Gang;Xie, Shi-Yun;Chen, Long;Dai, Xin;Zhao, Yu-Ming
    • Journal of Power Electronics
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    • v.17 no.1
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    • pp.305-313
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    • 2017
  • A novel interference isolation method is proposed by using several designed coils in capacitive power transfer systems as isolation impedances. For each designed coil, its stray parameters such as the inter-turn capacitance, coil resistance and capacitance between the coil and the core, etc. are taken into account. An equivalent circuit model of the designed coil is established. According to this equivalent circuit, the impedance characteristic of the coil is calculated. In addition, the maximum impedance point and the corresponding excitation frequency of the coil are obtained. Based on this analysis, six designed coils are adopted to isolate the interference from power delivery. The proposed method is verified through experiments with a power carrier frequency of 1MHz and a data carrier frequency of 8.7MHz. The power and data are transferred parrallelly with a data carrier attenuation lower than -5dB and a power attenuation on the sensing resistor higher than -45dB.

A Study on Lighting Emergency Lamp using Photovoltaic Generation System (태양광발전시스템을 이용한 유도등용 헝광램프의 점등에 관한 연구)

  • 이상집;성낙규;이승환;오봉환;백동현;이훈구;한경희
    • Fire Science and Engineering
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    • v.14 no.1
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    • pp.22-26
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    • 2000
  • Emergency lamp is installation usage on an emergency situation or firing. It's an offer at least of brightness. It's lighting to common source usually. It's transferred to reserve battery on power stoppage. This emergency lamp is lighted from solar cell system. The solar cell should be operated at the maximum power point. This paper proposes the new control method that half-bridge inverter using the solar cell can operate emergency lamp.

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An Investigation of Power Flow Mechanism in Beam-plate Built-up Structures with an Energy-absorbing Plate (보-판 결합 구조물에서 에너지 흡수체로 작용하는 판의 특성에 따른 파워 전달 특성에 관한 연구)

  • Yoo, Ji-Woo
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.17 no.1
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    • pp.55-64
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    • 2007
  • In the built-up structure consisting of a stiff beam and a flexible plate, Grice showed that the plate behaves as an energy absorber in narrow frequency bands(called plate blocking effect). This paper deals with such beam-plate coupled structures, where the plate is an energy absorber and the excited beam is an energy path. It is found that such energy dissipation can occur in the relatively broad bands, if different stiffnesses are used in the rectangular plate. It was experimentally verified by Heckl that the energies in terms of one-third octave band averages transferred to the plate(or dissipated in the plate) increase for increased plate damping. This Paper, however, shows that the energy absorption suddenly reduces at the certain narrow frequency bands where the plate damping effect upon the coupled beam is maximum. Also, in order to minimize energy transfer through the beam in terms of one-third octave band averages, it is advantageous to increase the plate damping closer to the excitation point All these results are based on the wane method.