Rectifier circuits are a necessary part of long range IPT systems, and reducing reactive power caused by rectifiers can help improve system efficiency. Bridge rectifier circuit is the most widely used, according to the different filter circuits can be divided into C filter rectifier and LC filter rectifier. The LEACI of the C-filter rectifier is inductive when the load resistance value is large, and the LEACI of the LC-filter rectifier is capacitive when the load resistance value is small. The reactive power caused by the reactance component increases system losses, destroys the resonant state of the compensation network, and increases the difficulty of closed-loop control and system modeling. There are errors in the calculation and analysis. This chapter proposes an analysis method for bridge rectifier LEACI, and proposes an improved rectifier circuit structure and parameter design method to reduce reactance component of LEACI, which is helpful to increase the operating range of the load and improve the system efficiency.