COMPOSITE RESONANCE CIRCUIT DRIVING CONTROL DEVICE AND NON-CONTACT POWER SUPPLY SYSTEM

• Main Authors: ITO YUKI, UEMATSU TAKESHI, MISHIMA TAICHI, NAGAOKA SHINGO
• Format: Patent
• Language: English; Japanese
• Published: 25.11.2022
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

To perform control to obtain an optimum operational frequency by using information on a power transmission side only, within a shorter period of time than that in a conventional technology.SOLUTION: A composite resonance circuit driving control device according to the present invention drivingly controls a composite resonance circuit consisting of a plurality of LC resonance circuits including inductances L of electromagnetically coupled power transmission/reception coils. The composite resonance circuit driving control device includes: an inverter circuit that drives the composite resonance circuit by switching an input DC power by a prescribed operational frequency to convert the DC power to AC power; an input current detector that detects an input current in the inverter circuit; and a frequency control and driving unit that drives the inverter circuit by generating a driving signal for the inverter circuit while changing the operational frequency by using a prescribed extreme value retrieving method, and retrieves the resonance frequency of the composite resonance circuit on the basis of the detected input current, and sets the operational frequency on the basis of the retrieved resonance frequency.SELECTED DRAWING: Figure 1 【課題】送電側のみの情報を用いて、従来技術に比較して短時間で、最適な動作周波数に制御する。【解決手段】本発明の複合共振回路の駆動制御装置は、互いに電磁的結合された送受電コイルのインダクタンスＬを含む複数個のＬＣ共振回路で構成される複合共振回路を駆動制御する。複合共振回路の駆動制御装置は、入力される直流電力を所定の動作周波数でスイッチングすることにより、前記直流電力を交流電力に変換して前記複合共振回路を駆動するインバータ回路と，前記インバータ回路の入力電流を検出する入力電流検出器と，所定の極値探索法を用いて、前記動作周波数を変化しながら前記インバータ回路の駆動信号を発生して前記インバータ回路を駆動し、前記検出された入力電流に基づいて、前記複合共振回路の共振周波数を探索し、前記探索された共振周波数に基づいて前記動作周波数を設定する周波数制御及び駆動部とを備える。【選択図】図１