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A Novel Integration Method for a Bipolar Receiver Pad Using LCC Compensation Topology for Wireless Power Transfer

A bipolar pad (BPP) is the newcomer magnetic structure of inductive power transfer (IPT). This pad has a better performance in the lateral misalignment compared to the other single-sided pads such as double-D pad (DDP). Also, it has less amount of copper compared to the double-D quadrature pad. Double-sided LCC compensation topology is an efficient way to compensate the IPT contrasted with the other compensation types. However, due to the utilization of compensation inductances, the system volume is larger than the other formats. Thus, to have a compact compensation method, these inductances are integrated into the main coils, considering the effects of the coils on each other. In this paper, for the first time, compensation of a BPP with novel integrated inductances of the  LCC compensation method is introduced. This integration is analyzed and its effects are optimized to an insignificant rate with three-dimensional finite element analysis tool ANSYS MAXWELL. Also, the primary compensation is changed to a series method to decrease the number of compensation components and assess the effects of this variation on the circuit. Finally, DDP transmitter and BPP receiver with integrated double-sided LCC compensation topology are prototyped to verify the analytical results.