High Efficiency Wireless Power Transfer System Using Variable Capacitance Series Compensator

• Project/Area Number: 16K06207
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: University of Tsukuba
• Principal Investigator: Tadano Hiroshi 筑波大学, 数理物質系, 教授 (30394448)
• Co-Investigator(Kenkyū-buntansha): 磯部 高範 筑波大学, 数理物質系, 准教授 (50545928)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 非接触給電 / 可変容量 / 直列保証回路 / 力率 / SiC-MOSFET / スパイラルコイル / 位置ずれ / インバータ / 直列補償 / GCSC / エネルギー効率化 / ハイブリッド車

Outline of Final Research Achievements

By applying the series compensate circuit which act as the variable capacitor using semiconductor switching devices to the wireless power transfer system, it was studied that the system acted as compensating the change of reactance due to misalignment between transmitting and receiving coils was studied.
Using this series compensator with variable capacitance, it was confirmed using 1 kW test system that this system was able to operate with high efficiency even if the misalignment was occurred. And it was confirmed that the low loss characteristic was depended on the zero-voltage zero-current switching of high-frequency inverter.

Academic Significance and Societal Importance of the Research Achievements

電気自動車等の給電システムとして非接触給電システムが注目されているが、通常は送信コイルと受信コイルの位置ずれによって、システムの効率が低下するため、高効率での給電が困難となる。本提案の可変容量直列保証回路を用いた非接触給電システムは、その効率を常に最適な状態とすることが可能なため、効率の良い充電が行えるとともに、充電設備の最適化が可能となる。
従って、エネルギーを無駄にしない環境に優しい給電システムを構築できる。

Research Products

• [Journal Article] Efficiency improvement of high-frequency inverter for wireless power transfer system using series compensator (2019)
  • Author(s): Jun Osawa, Takanori Isobe, Hiroshi Tadano
  • Journal Title: Electrical Engineering in Japan Volume: 206 Issue: 3 Pages: 51-61
  • DOI: 10.1002/eej.23192
  • NAID: 130007493837
  • Open Access
• [Journal Article] Efficiency Improvement of High Frequency Inverter for Wireless Power Transfer System Using Series Compensator (2018)
  • Author(s): 大澤順、磯部高範、只野博
  • Journal Title: IEEJ Transactions on Industry Applications Volume: 138 Issue: 10 Pages: 800-809
  • DOI: 10.1541/ieejias.138.800
  • NAID: 130007493837
  • ISSN: 0913-6339, 1348-8163
  • Year and Date: 2018-10-01
  • Peer Reviewed
• [Presentation] 直列補償回路による非接触給電用高周波インバータのコイルパラメータに応じた効率最適化 (2017)
  • Author(s): 大澤順、渡邊直也、磯部高範、只野博
  • Organizer: 平成29年電気学会全国大会
  • Place of Presentation: 富山大学（富山県富山市）
  • Year and Date: 2017-03-15
• [Presentation] 直列補償回路を用いた非接触給電システムにおける出力電力制御法の提案と実験的検証 (2017)
  • Author(s): 渡邊直也、只野博、磯部高範
  • Organizer: 平成29年電気学会全国大会
  • Place of Presentation: 富山大学（富山県富山市）
  • Year and Date: 2017-03-15
• [Presentation] Efficiency Improvement of High Frequency Inverter for Wireless Power Transfer Systems Using a Series Reactive Power Compensator (2017)
  • Author(s): J. Owasa, T. Isobe and H. Tadano
  • Organizer: 2017 IEEE 12th International Conference on Power Electronics & Drive Systems
  • Int'l Joint Research