Relay type wireless energy transmitting device

Abstract

The invention provides a relay type wireless energy transmitting device. The relay type wireless energy transmitting device comprises a transmitting module, a relay module and a receiving module, thetransmitting module, the relay module and the receiving module are sequentially arranged and each comprise a coil and a compensation loop. The transmitting module, the relay module and the receiving module achieve wireless transmission of energy through coils, the insulation level is improved, the situation of partial discharge is reduced, loads connected with the wireless energy transmitting device are independent of one another, and power supply faults are not likely to be caused. The energy transmission among the transmitting module, the relay module and the receiving module is achieved ina non-contact mode of magnetic coupling among the coils, the transmission efficiency is high, and the compactness of the size and the good electromagnetic compatibility are guaranteed. Reliable powersupply is provided for a gate drive circuit in power electronic equipment, and meanwhile, low-cost high-voltage insulation is realized in an air insulation mode; the compensation loop is used for compensating inductive reactive power of the coil, so that the overall power factor and energy transmission efficiency of the device are ensured.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a relay type 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-volt...

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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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