PROBLEM TO BE SOLVED: To provide a power transmission unit of a wireless power supply device with high transmission efficiency, which achieves impedance matching with high precision in accordance with a change in the number of devices on a power reception side without increasing the size.SOLUTION: A power transmission unit 10 of a wireless power supply device 11 supplies power to two or more mobile bodies 12 without contact by using magnetic field resonance. The power transmission unit 10 comprises: a power transmission coil 22; a high frequency generation section 21; capacitor circuit groups 51 and 52; and a control section 24. The capacitor circuit groups 51 and 52 include series capacitors connected in series to the power transmission coil 22 and parallel capacitors connected in parallel to switching elements 41 and 42 for generating a high frequency, and have different impedances which are set with the power transmission coil 22. The control section 24 intermits switches 514, 515, 524 and 525 which intermit the capacitor circuit groups 51 and 52 in accordance with the number of mobile bodies 12 for supplying power from the power transmission coil 22.SELECTED DRAWING: Figure 1
【課題】精度が高く、大型化を招くことなく受電側の台数の変化に応じてインピーダンスマッチングが図られ、伝達効率の高い無線給電装置の送電ユニットを提供する。【解決手段】無線給電装置11の送電ユニット10は、2台以上の移動体12へ磁界共鳴を用いて非接触で電力を供給する。送電ユニット10は、送電コイル22、高周波生成部21、コンデンサ回路グループ51、52および制御部24を備える。コンデンサ回路グループ51、52は、送電コイル22と直列に接続されている直列コンデンサ、および高周波を生成するスイッチング素子41、42と並列に接続されている並列コンデンサを有し、送電コイル22とともに設定されるインピーダンスが異なっている。制御部24は、送電コイル22から電力を供給する移動体12の数に応じて、コンデンサ回路グループ51、52を断続するスイッチ514、515、524、525を断続する。【選択図】図1
POWER TRANSMISSION UNIT OF WIRELESS POWER SUPPLY DEVICE
無線給電装置の送電ユニット
2018-07-26
Patent
Electronic Resource
Japanese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES |
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