NONCONTACT POWER TRANSMISSION SYSTEM, AND POWER TRANSMISSION DEVICE

• Main Author: KOTANI HIROYUKI
• Format: Patent
• Language: English; Japanese
• Published: 25.05.2017
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSFORMERS

PROBLEM TO BE SOLVED: To provide a noncontact power transmission system which enables the simplification of the structure of a drive circuit.SOLUTION: A noncontact power transmission system C transmits an electric power from a power transmission device A to a power-receiving device B1 in a noncontact manner. The power transmission device A includes: a high-frequency power supply device 1 operable to output a constant high-frequency current; and a power transmission unit 2. The power-receiving device B1 includes a power-receiving unit 3. The high-frequency power supply device 1 includes: a DC power supply 11 operable to output a DC voltage; a switching element Qs operable to perform a switching action based on a high-frequency control signal S2; an inductor L1 connected in series between the DC power supply 11 and the switching element Qs; a first resonance circuit LC3 connected in series between the power transmission unit 2 and a node of the switching element Qs and the inductor L1, of which the resonance frequency is coincident with a frequency of the high frequency control signal S2; and a second resonance circuit LC2 connected in parallel with the switching element Qs, of which the resonance frequency is double the frequency of the high frequency control signal S2.SELECTED DRAWING: Figure 2 【課題】ドライブ回路を単純な構成とすることができる非接触電力伝送システムを提供する。【解決手段】送電装置Ａから受電装置Ｂ１に非接触で電力を伝送する非接触電力伝送システムＣにおいて、送電装置Ａが、一定の高周波電流を出力する高周波電源装置１と、送電ユニット２とを備え、受電装置Ｂ１が、受電ユニット３を備えた。そして、高周波電源装置１が、直流電圧を出力する直流電源装置１１と、高周波制御信号Ｓ２に基づいてスイッチング動作を行うスイッチング素子Ｑｓと、直流電源装置１１とスイッチング素子Ｑｓとの間に直列接続されたインダクタＬ１と、スイッチング素子ＱｓとインダクタＬ１との接続点と送電ユニット２との間に直列接続され、高周波制御信号Ｓ２の周波数を共振周波数とする第１の共振回路ＬＣ３と、スイッチング素子Ｑｓに並列接続され、高周波制御信号Ｓ２の周波数の２倍の周波数を共振周波数とする第２の共振回路ＬＣ２とを備えた。【選択図】図２