公开(公告)号：US20230386748A1

公开(公告)日：2023-11-30

申请号：US18324344

申请日：2023-05-26

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI ,  Shinya SAITO ,  Ayako SATO ,  Yasuo WATANABE ,  Takehisa TAMURA ,  Kenya TAMAKI

IPC: H01G4/232 ,  H01G4/30

CPC classification number: H01G4/2325 ,  H01G4/30

Abstract: A multilayer ceramic electronic device includes an element body including a ceramic layer and an internal electrode layer, and an external electrode formed on an outer surface of the element body and electrically connected to part of the internal electrode layer. The external electrode includes a first layer in direct contact with the element body and containing a first insulator phase and first metal phases, and a second layer in contact with an outer surface of the first layer and containing a second insulator phase and second metal phases. An area ratio of the first metal phases in the first layer is more than 8% and 30% or less. An area ratio of the second metal phases in the second layer is larger than the area ratio of the first metal phases in the first layer. The first metal phases have an average aspect ratio of 3.5 or more.

公开(公告)号：US20250096765A1

公开(公告)日：2025-03-20

申请号：US18756961

申请日：2024-06-27

Applicant: TDK CORPORATION

Inventor： Toshihiro IGUCHI ,  Masaki HARA ,  Ryota NAMIKI ,  Ayako SATO ,  Kenya TAMAKI

IPC: H03H7/00

Abstract: An equivalent circuit includes a first capacitor having a first capacitance, a circuit part configured to include an inductor component, a capacitor component, and a resistor connected in series with one another, the circuit part being connected in parallel with the first capacitor, and a second capacitor provided between the first capacitor and the circuit part and having a second capacitance. The first capacitance of the first capacitor changes in accordance with a voltage value of a direct current voltage applied to the first capacitor. The second capacitor has the positive second capacitance that changes in accordance with the voltage value of the direct current voltage applied to the first capacitor and that is N times (N>0) the first capacitance of the first capacitor.

公开(公告)号：US20170063163A1

公开(公告)日：2017-03-02

申请号：US15254331

申请日：2016-09-01

Applicant: TDK CORPORATION

Inventor： Narutoshi FUKUZAWA ,  Ayako SATO ,  Tsunehiro SAEN

IPC: H02J50/12 ,  H02J50/90 ,  H02J50/70

CPC classification number: H02J50/12 ,  H02J50/70 ,  H02J50/90

Abstract: A coil device and a wireless power transmission device which can detect the happened open fault or short fault reliably in any one of the plurality of capacitor elements constituting the capacitor circuit. Coil device includes coil for power transmission, capacitor circuit connected to coil for power transmission and having a plurality of capacitor elements, conductive metal portion which is disposed close to coil for power transmission, and measuring portion for measuring a voltage or a current generated in metal portion.

Abstract translation: 一种线圈装置和无线电力传输装置，其可以在构成电容器电路的多个电容器元件中的任一个中可靠地检测发生的开路故障或短路故障。 线圈装置包括用于动力传递的线圈，电容器电路连接到用于电力传输的线圈，并且具有多个电容器元件，靠近线圈设置用于电力传输的导电金属部分，以及用于测量金属中产生的电压或电流的测量部分 一部分。