Cascaded-Loop Wireless Power Transfer for Multiple Magnetic Fields Generation

Magnetic field has been used in some advanced agricultural production. Recenently some researches find low power magnetic field can expell pests and influence plants growth, thus magnetic field can be used to promote the growth of plants and repel pests. While existing magnetic field generation devices are heavy and hard to produce fields in a large area, WPT system has the potential to be used as magnetic field generation device for agricultural production for it is cheaper and easy to assemble. This paper proposed a novel cascaded loop WPT system targeting on large magnetic field generation and zero load consumption. The system extends the range of the magnetic field and reduces energy consumption by cascading multiple coils in a novel topology. A special arrangement is discussed to achieve multiple uniform magnetic fields generation. One 5V DC input, 1MHz prototype is built to verify the feasibility of the topology and the arrangement.