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Misalignment tolerance is essential in the design and implementation of inductive power transfer (IPT) systems. This article proposes an IPT coupler, termed the rectangular-solenoidal pad (RSP), which combines a rectangular coil and a solenoidal coil. The proposed RSP can effectively capture both vertical and horizontal magnetic fields, complementing each other to suppress magnetic flux variation during misalignment. Compared with the commonly-used double-D quadrature pad, the proposed RSP achieves the same level of magnetic flux variation suppression with less coil wire, making it more misalignment-tolerant with the same amount of copper. To optimize the design for misalignment tolerance, a quick approximation method for designing the solenoidal coil is developed to eliminate the need to simulate mutual inductances across the entire range of misalignment during coil design. A 1-kW experimental prototype is built to validate the proposed design.

This article proposes a novel approach to designing integrated compensation circuits with fewer components for wireless power transfer (WPT) systems. Our approach utilizes $\Gamma$-circuit and ${\unicode{xA780}}$-circuit to achieve voltage–current conversion and is applicable for both inductive and capacitive couplers. By incorporating the designed compensation circuits at the primary or secondary side of second-order compensated WPT converters, higher-order compensated WPT converters can be achieved. These converters offer the ability to transform between load-independent constant current (CC) output and constant voltage (CV) output at the same operating frequency, while also possessing desirable properties such as reduced dependence on couplers and an expanded operating range. Moreover, our approach can be extended to increase flexibility on the output side, without compromising the simplicity of design parameter determination. We present the properties of the resulting circuits, enabling the selection of multiple compensation circuits suitable for various application scenarios. Finally, we validate the proposed compensation design's applicability to a WPT system by constructing a laboratory prototype that can produce both CC and CV output forms at a fixed operating frequency.