基于 S/SP 补偿拓扑的强抗偏移感应式无线电能传输系统

Aiming at the problem of unstable output voltage and low efficiency caused by the offset of inductive power transfer (IPT) systems, a novel S/SP compensation IPT system is proposed. The system remains small output voltage fluctuation and high transmission efficiency under the conditions of variable coupling variable self-inductance and variable coupling constant self-inductance. First, based on Maxwell finite element simulation, the magnetic flux distribution and magnetic field distribution of the tank core loosely coupled transformer are analyzed, and the parameter variation of offset in different directions is summarized. Then, a design method of S/SP compensation parameters is proposed to improve the misalignment tolerance capability of the system, and the corresponding transformer design criteria are obtained. Combined with the magnetic simulation data, the variations of system output fluctuation and input impedance angle are obtained by numerical calculation. Finally, experiments have verified the feasibility of the system to realize high-efficiency and low fluctuation contactless energy transmission under multi-directional offset. The output voltage fluctuations of the system offset along the longitudinal and horizontal directions are 2.7% and 3.1%, respectively, and the transmission efficiency is maintained at 90.8%~94.3%.