Abstract:At present, there is a safety problem of specific absorption rate (SAR) in the resonant wireless charging system of pacemaker. To avoid the damage caused by SAR, a resonant wireless energy supply system based on LCCC compensation is designed in the frequency range of 10～100 kHz. The influences of frequency, coil offset and compensation parameters on the transmission performance of the system are considered. A loss circuit model is formulated, which considers the equivalent series resistance. By analyzing the output power and transmission efficiency of the system under different frequencies, LC parameters and coupling coefficients, the optimal frequency and compensation parameters are comprehensively determined. Finally, an experimental system is set up to check the system′s energy supply efficiency, antioffset capability, and corresponding safety indicators. Results show that the transmission efficiency of the system can reach 433%～732% and the maximum temperature rise is only 08℃ under the condition of 0～2/3 lateral offset of the center distance of two coils. Meanwhile, SAR evaluation is not necessary. It provides an effective method for improving the safety design of human implantable equipment. .txt