Design and Implementation of a Coupled Complementary IPT System for Extensive Misalignment Tolerance and CC/CV Outputs

Abstract

The inevitable misalignment tolerance (MT) between the transmitter and receiver of a loosely coupled transformer (LCT) poses a significant challenge to the stability and efficiency of inductive power transfer (IPT) systems. This article proposes an IPT system featuring an integrated coupled complementary dual-receiver (ICCDR) structure to address this issue. The proposed ICCDR comprises two orthogonally arranged solenoid coils (SCs) designed to produce complementary mutual inductances, enabling the system to achieve an MT range of 172% (175%) of the transmitter length. Utilizing a synthesized equivalent mutual inductance, a single-switch reconfigurable topology is developed to achieve constant current (CC) and constant voltage (CV) outputs. The system maintains output current (voltage) fluctuations within 5.82% (5.96%) while ensuring system efficiency between 88.42% and 90.67% (86.08%–90.32%) across the MT range. These results are validated through a 535-W/85-kHz experimental prototype, confirming the system’s ability to improve MT, output stability, and efficiency effectively.