• Title, Summary, Keyword: Automatic Power Charger

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A 6.78 MHz Constant Current and Constant Voltage Wireless Charger for E-mobility Applications (E-모빌리티 응용을 위한 6.78MHz 정전압 정전류 무선 충전기)

  • Tran, Manh Tuan;Choi, Woojin
    • Proceedings of the KIPE Conference
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    • pp.142-144
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    • 2019
  • Nowadays, multi-MHz wireless power transfer (WPT) system has received a great concern of study due to its desirable characteristics such as user convenience, system compact and better safety as compared to the conventional DC-DC with cord. This paper presents a solution for WPT Lithium Batteries charger with Constant Current (CC) and Constant Voltage (CV) charging process. The proposed system consists of a high frequency class D power amplifier, a pair of PCB coil, transformable high-order resonant network and a full-bridge rectifier. The charger can be implemented CC /CV charging profile thanks to automatic reconfigurable resonant compensator. Therefore, the battery can be fully charged without the help of an additional DC/DC converter. The simulation and 50W-6.78-MHz hardware experimental results are presented to verify the feasibility of the proposed method and to evaluate the performance of the proposed wireless battery charger.

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Constant Current & Constant Voltage Battery Charger Using Buck Converter (벅 컨버터를 이용한 정전류 정전압 배터리 충전기)

  • Awasthi, Prakash;Kang, Seong-Gu;Kim, Jeong-Hun;Park, Sung-Jun
    • Proceedings of the KIPE Conference
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    • pp.399-400
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    • 2012
  • The proposed battery charger presented in this paper is suitable for Lead-Acid Battery and the dc/dc buck converter topology is applied as a charger circuit. The technique adopted in this charger is constant current & constant voltage dual mode, which is decided by the value of voltage of proposed battery. Automatic mode change function is detected by the percentage value of level of battery charging. CC Mode (Constant Current Mode) is operated when charging level is below 80% of the total charging of Battery voltage and above 80% of battery voltage charging, CV Mode (Constant Voltage Mode) is automatically operated. As the charging level exceeds 120%, it automatically terminates charging. The feedback signal to the PWM generator for charging the battery is controlled by using the current and voltage measurement circuits simultaneously. This technique will degrade the damage of proposed type of battery and improve the power efficiency of charger. Finally, a prototype charger circuit designed for a 12-V 7-Ah lead acid battery is constructed and tested to confirm the theoretical predictions. Satisfactory performance is obtained from simulation and the experimental results.

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The Basic Position Tracking Technology of Power Connector Receptacle based on the Image Recognition (영상인식 기반 파워 컨넥터 리셉터클의 위치 확인을 위한 기초 연구)

  • Ko, Yun-Seok
    • The Journal of the Korea institute of electronic communication sciences
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    • v.12 no.2
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    • pp.309-314
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    • 2017
  • Recently, the fields such as the service robot, the autonomous driving electric car, and the torpedo ladle cars operated autonomously to enhance the efficiency of management of the steel mill are receiving great attention. But development of automatic power supply that doesn't need human intervention be a problem. In this paper, a position tracking technology of power connector receptacle based on the computer vision is studied which can recognize and identify the position of the power connector receptacle, and finally its possibility is verified using OpenCV program.

A Development of Unified Digital Generator Controller (발전기 통합제어장치 개발)

  • Yoo, Young-Suk;Kwon, Hyuk;Lee, Sang-Jeong;Lee, Sun-Hee;Choi, Yong-Sil
    • Proceedings of the KIEE Conference
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    • pp.1164-1166
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    • 1996
  • This system is an unified Digital Generator Controller. It has an Electronical Generator Sequencer which control the sequence of a generator, an AVR(Automatic Voltage Regulator) which perform the regulation of generator terminal voltage optimally to user's needs, and an Auto Synchronizer, it can switch the power source on from generally used an the generator to load automatically. It also possesses a Battery Charger which charge a storage battery to appropriate voltage level. Here we describe it's configuration, specifications, the way of control, figure, functions and waveforms.

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