PROBLEM TO BE SOLVED: To provide a power transmission device capable of suppressing variations in detection accuracy depending on the position of metallic foreign matter.SOLUTION: A power transmission device 3 includes: a power transmission coil 21 that transmits electric power in a non-contact manner to a power reception coil provided outside; and a plurality of detection coils 26, 27 provided around the power transmission coil 21. At a center of the detection coils 26, 27, at least one of a low permeability member having a magnetic permeability lower than that of air and a reflection member reflecting a magnetic flux passing through the detection coil is provided so as to suppress variations in detection precision depending on the position of metallic foreign matter.SELECTED DRAWING: Figure 2
【課題】金属異物の位置による検知精度のばらつきの抑制が図られた送電装置を提供する。【解決手段】送電装置3は、外部に設けられた受電コイルに非接触で電力を送電する送電コイル21と、送電コイル21の周囲に設けられた複数の検知コイル26,27とを備え、検知コイル26,27の中央部には、空気よりも透磁率が小さい低透磁率部材と、検知コイルを通る磁束を反射する反射部材との少なくとも一方が設けられ、金属異物の位置による検知精度のばらつきの抑制を図ることができる。【選択図】図2
POWER TRANSMISSION DEVICE
送電装置
2017-06-01
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 / H01F MAGNETS , Magnete |
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