Many conventional transdermal energy transmission systems are designed as open-loop systems. It is crucial for patients to maintain stillness during the charging process since any movement can lead to misalignment or flipping of the coil. This can adversely affect the power received and disrupt the normal charging procedure. Regarding the above-mentioned issues, the LCC-S topology was used to achieve constant voltage characteristics at the receiver end. Then, a method based on mutual inductance estimation and primaryside power compensation was employed to dynamically adjust the transmit power at the transmitter end and effectively control the voltage at the receiver end. The simulation and in vitro experimental results demonstrate that this system can maintain a constant output voltage at the receiving end throughout the entire charging process of the lithium battery. The system allows for limited positional changes of the receiving coil, including axial displacement within 25 mm, lateral displacement within 22 mm, and rotation within an angle of 80°. This enables patients to engage in moderate movement during the charging process, greatly improving the stability and reliability of the transcutaneous energy transfer system. It has significant implications for the further application of artificial anal sphincter systems.