Abstract: An outdoor multifunctional data cable is provided, which includes a data cable body, an end of the data cable body is provided with a data joint, the data joint includes a first joint. The data cable body is movably connected to a portable electrical module through a connecting mechanism, the portable electrical module is provided with a second joint. The portable electrical module is electrically connected to the first joint through the second joint. The data cable body in the present disclosure is movably connected to various optional portable electrical modules, a transmission function is retained, and an application of the data cable is also increased, thereby improving a practicality of the data cable; the portable electrical module and the data cable body are integrally connected, which can effectively prevent a loss of the portable electrical module during use and enhance the portability of portable electrical module.

Abstract: The disclosure provides a balanced-current circuit structure and a parameter design method for a bifilar winding coil of wireless power transfer. The disclosure relates to the technical field of magnetic coupling wireless power transfer. The circuit includes a bifilar winding coil, a compensation capacitor array and a controlled voltage source array. The bifilar winding coil includes a first coil and a second coil, the compensation capacitor array includes a first compensation capacitor and a second compensation capacitor, and the controlled voltage source array includes a first controlled voltage source and a second controlled voltage source.