公开(公告)号：US20140167523A1

公开(公告)日：2014-06-19

申请号：US14105678

申请日：2013-12-13

Applicant: TDK CORPORATION

Inventor： Kazutaka TAMAKI ,  Hitoyoshi KURATA

IPC: H01F38/14

CPC classification number: H02J50/12 ,  H02J5/005 ,  H02J7/025

Abstract: A power transmission device includes a power conversion circuit that outputs an alternating voltage in order to generate an alternating magnetic field and a control circuit used to control a frequency of the alternating voltage. The control circuit sets, in a predetermined frequency range, the frequency of the alternating voltage to a higher one of a first frequency at which transmission efficiency is highest and a second frequency at which a voltage generated in the power receiving device is highest, and performs power transmission.

Abstract translation: 电力传输装置包括输出交流电压以产生交变磁场的电力转换电路和用于控制交流电压的频率的控制电路。 控制电路在预定的频率范围内将交流电压的频率设定为传输效率最高的第一频率和受电装置中产生的电压最高的第二频率，并执行 电力传输。

公开(公告)号：US20150001954A1

公开(公告)日：2015-01-01

申请号：US14312235

申请日：2014-06-23

Applicant: TDK CORPORATION

Inventor： Kazutaka TAMAKI ,  Masahide OHNISHI ,  Tadao SENRIUCHI

IPC: H04B5/00

CPC classification number: H04B5/0037 ,  B60L3/00 ,  B60L3/12 ,  B60L11/182 ,  H02J7/025 ,  H02J50/10 ,  Y02T10/7005 ,  Y02T10/7072 ,  Y02T90/122 ,  Y02T90/14

Abstract: A wireless power receiving device includes a voltage detection unit that detects an output voltage value of a rectifying unit, a power reduction unit that includes a switching element connected to a charging unit in parallel, and a control unit that controls operations of the switching element. In a case where the output voltage value detected by the voltage detection unit exceeds a first reference voltage value set in advance, the control unit controls and turns the switching element on by applying a voltage to the switching element, and controls the value of the voltage to be applied to the switching element so that the difference between the voltage value calculated on the basis of a current flowing in the switching element and a second reference voltage value set in advance decreases.

Abstract translation: 无线电力接收装置包括检测整流单元的输出电压值的电压检测单元，并联包括连接到充电单元的开关元件的功率降低单元和控制开关元件的动作的控制单元。 在由电压检测单元检测出的输出电压值超过预先设定的第一基准电压值的情况下，控制单元通过向开关元件施加电压来控制开关元件而使开关元件导通，并控制电压值 施加到开关元件，使得基于在开关元件中流动的电流计算出的电压值与预先设定的第二参考电压值之间的差异减小。