The static wireless charging of electric vehicles is more convenient than traditional charging methods, but due to man-made parking will cause the coil to shift, which will cause the transmission power of the system to fluctuate and affect the stability of the system. Through the analysis of the traditional doublesided resonant system, it is found that it is more sensitive to the coupling coefficient k and the primary current will increase suddenly when k approaches zero. In order to solve these two problems, this paper compares four different resonance conditions and performs a large number of simulation experiments show that the antioffset performance of the system is the highest when both the primary and secondary sides are designed to be detuned, but a certain efficiency is sacrificed. When the bilateral detuned system is in the range of 2.4 times the coupling coefficient k, then the fluctuation of transmission power is less than 15%, and the maximum transmission efficiency is 58%. It has good anti-offset ability. And when k approaches zero, the primary current will not increase suddenly. The security performance of the system is greatly improved.
展开▼
