Serial wireless energy transmission device

Abstract

The invention provides a serial wireless energy transmission device. The serial wireless energy transmission device comprises a sending module, relay modules and a receiving module, the sending module, the relay modules and the receiving module are arranged in sequence and each comprise a coil, and the sending module, the relay modules and the receiving module achieve wireless transmission of energy through the coils; the magnetic coupling among the sending module, the relay modules and the receiving module is achieved through the coils, the insulation level is improved, the situation of partial discharge is reduced, loads connected with the serial wireless energy transmission device are independent of one another, and power supply faults are not prone to being caused. Energy transmissionis achieved through a non-contact mode of magnetic coupling between the coils, the transmission efficiency is high, and the compactness of the size and the good electromagnetic compatibility are guaranteed. In the energy transmission process among the relay modules, the power factor of the whole device is improved through compensation capacitors, all levels of loads are independent of one anotherand do not influence one another, and it is guaranteed that all levels of loads are flexible in power condition and do not influence the overall performance of the energy transmission device.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a serial wireless energy transmission device. Background technique [0002] In high-voltage power electronic converter valves for grid applications, the voltage level can be as high as hundreds or even thousands of kilovolts. In order to increase the voltage level of power electronic devices, multiple power semiconductor devices need to be applied in series. In the series application of devices, each device needs to be equipped with a gate drive circuit to be responsible for the control and protection of the device, because the devices in series are at different potentials, and the corresponding gate drive circuits are also at different potentials. Therefore, the gate drive circuit Isolated power supply is a problem that needs to be solved urgently. It is necessary to ensure reliable isolated power supply of the drive circuit and at the same time meet the high-voltage ...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, transformers with iron cores are generally used to realize the isolated power supply and energy transmission of the gate drive circuit. The transformers are connected in cascade, the insulation level is low, the partial discharge is serious, and different loads are not independent of each other. A sudden change in the power of a certain level of transformer will affect the overall transmission of power, which may easily lead to power failure

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