Study of the system to estimate charge situation based on the impedance value in contactless power transmission

我们一直在研究充电式心脏起搏器。很难从体外估计充电情况。重点研究了二次阻抗值随充电状态的变化，提出了从体外估算二次阻抗值来检测充电式心脏起搏器电池状况的方法；当钛外壳不在一次线圈和二次线圈之间时，用我们提出的公式来估算二次阻抗值是可能的。我们分析了钛外壳的影响，并提出了加入钛损耗电阻的估算新公式。当钛外壳位于一次线圈和二次线圈之间时，我们也证实了用新提出的公式来估计二次阻抗值是可能的。

We have been researching the rechargeable cardiac pacemaker. It is difficult to estimate the charge situation from outside the body. We focused on the secondary impedance value which changes according to the charge status and we proposed the method to check the battery situation of rechargeable cardiac pacemaker by estimating the value from outside the body.When the titanium case is not located between the primary coil and the secondary coil, we have confirmed that it is possible to estimate the secondary impedance value by using our proposed formula. We analyzed the effect of the titanium case and we proposed the estimated new our formula which inserted the titanium loss resistance. When the titanium case is located between the primary coil and the secondary coil, we have also confirmed that it is possible to estimate the secondary impedance value by using the new proposed formula.