Wireless power transfer (WPT) is favored by consumers due to its convenience, safety, and flexible layout. Circular and rectangular coils are the most common coil structures in WPT systems. However, they are not suitable for installation conditions with angled groove areas such as railways, conveyors, and so on. To fully utilize installation space and to improve transfer efficiency, this paper has proposed a quasi-bowl-shaped (QBS) magnetic coupler, which can suitably fit on angled grooves. First, a QBS coupler model was presented. Second, formulas of its spatial magnetic field density were derived. Third, the influences of the bending distance and bending angle on the coupler coefficient were analyzed. Fourth, five magnetic core types were presented and analyzed for coupler optimization. Finally, QBS WPT performances were tested on a newly built experiment platform. Experimental results show that the QBS coupler can realize a constant transfer efficiency of 92.36% at an axial distance of 6 cm, and it can realize a constant transfer efficiency of 84.17% at an axial distance of 10 cm.

无线电源传输（WPT）由于其便利性，安全性和灵活的布局而受到消费者的青睐。圆形和矩形线圈是WPT系统中最常见的线圈结构。但是，它们不适用于带有倾斜凹槽区域的安装条件，例如铁路，输送机等。为了充分利用安装空间并提高传输效率，本文提出了一种准碗形（QBS）磁耦合器，该耦合器可以适当地安装在成角度的凹槽上。首先，提出了QBS耦合器模型。其次，推导了其空间磁场密度的公式。第三，分析了弯曲距离和弯曲角度对耦合系数的影响。第四，提出并分析了五种磁芯类型，以进行耦合器优化。最后，QBS WPT性能在新建的实验平台上进行了测试。实验结果表明，QBS耦合器在轴向距离为6 cm时可实现92.36％的恒定传输效率，在轴向距离为10 cm时可实现84.17％的恒定传输效率。