Wireless power transmission system arranged in closed structure

Abstract

The invention relates to the technical field of wireless power transmission, and particularly discloses a wireless power transmission system arranged in a closed structure, which comprises a signal transmitting end and a signal receiving end. The signal transmitting end comprises a signal acquisition circuit, a transmitting end MCU, a modulation circuit and a transmitting end communication coil which are connected in sequence. The signal receiving end comprises a receiving end communication coil, a demodulation circuit, a receiving end MCU and a post-stage load circuit which are connected in sequence; and the transmitting end communication coil is electromagnetically coupled with the receiving end communication coil. Sensing signals are acquired by the signal acquisition circuit, the transmitting end MCU generates corresponding control signals according to a control strategy, and the control signals are modulated by the modulation circuit and then transmitted to the signal receiving end in a wireless coupling mode. The signal receiving end demodulates the loaded control signal and then distributes the demodulated control signal to the corresponding load circuit through the receiving end MCU, wireless transmission of the signal is achieved, the transmission quality of the signal can be guaranteed, and the system is simple in structure and convenient to install.

Description

technical field [0001] The invention relates to the technical field of wireless power transmission, in particular to a wireless power transmission system arranged in a closed structure. Background technique [0002] Traditional power transmission methods can no longer meet the needs of some special applications. For example, in a wind power generation system, when the wind drives the fan to rotate, its blades often need to adjust their attitude, and the energy required to drive the blades to rotate is often transmitted through conductive slip rings. However, there are many deficiencies in the conductive slip ring: First, the conductive ring is worn. If the lubricant content is high, the wear amount is small, but the conductivity becomes poor; on the contrary, the lubricant content is small, the conductivity is good, but the wear amount increases. The second is that the contact part of the slip ring and the brush generates a lot of heat. Since the channels of the conductive ...

AI Technical Summary

Problems solved by technology

However, there are many deficiencies in the conductive slip ring: First, the conductive ring is worn. If the lubricant content is high, the wear amount is small, but the conductivity becomes poor; on the contrary, the lubricant content is small, the conductivity is good, but the wear amount increases

The second is that the contact part between the slip ring and the brush generates a lot of heat. Since the channels of the conductive ring must be insulated, and the insulating material usually has poor thermal conductivity, it is difficult to realize the heat dissipation of the conductive ring through conduction.

[0003] For this reason, some people have also tried some new methods to transmit electric energy to rotating parts, such as the use of rolling ring technology to change sliding friction into rolling friction, which reduces the amount of wear, but there are still problems such as uneven stress on rolling elements and inability to discharge during grinding. ;Using mercury collector ring technology, using liquid metal instead of sliding friction, no friction, but difficult to seal; using optical collector ring technology, using non-contact optical fiber as the transmission medium, but the power that can be transmitted is small

Therefore, none of these technologies can fully meet the needs of long-life power transmission between rotating interfaces of moving parts

[0004]In addition, the existing energy transmission mechanism, in order to realize the transmission of control signals and the collection of sensor signals, often needs to add additional communication modules, and the installation structure is complicated

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