Non-contact charging system

Abstract

The invention discloses a non-contact charging system. The non-contact charging system comprises a wireless power transmitting device and a power receiving device, voltage reduction is achieved through the turn ratio of a transmitting end coil to a receiving end coil, a transmitting end inverter circuit in the non-contact charging system adopts fixed-frequency control, and a compensation circuit adopts an S / SP capacitance compensation mode. By utilizing the characteristics of the voltage gain flat area at the gain intersection point, the system works in the voltage gain flat area, and the transmitting end and the receiving end do not communicate with each other, so that the defect that wireless communication is affected by external interference signal distortion to influence data transmission is overcome. According to the non-contact charging system, the ratio of the voltage output by the receiving-end rectifying and filtering circuit to the voltage output by the transmitting-end rectifying and filtering circuit is constant, so that the voltage output by the receiving-end rectifying and filtering circuit is stable and does not change along with the load, and the charging efficiencyis high.

Description

technical field [0001] The present invention relates to a non-contact charging system, in particular to a non-contact charging system for performing power transmission between devices in a non-contact manner. Background technique [0002] With the ease of use of cordless tools, rechargeable battery powered portable tools are becoming more and more popular. Known rechargeable batteries are mainly charged by a charger with a wired interface, while rechargeable batteries need to be frequently replaced or charged in time due to their limited battery life. In many areas, due to the limitations of the environment or usage scenarios, there is no power interface, and the rechargeable battery cannot be charged in time, so it cannot guarantee the needs of working in a special environment and for a long time. In recent years, non-contact power supply devices have been known, and the adoption of non-contact charging enables omission of connection terminals for electrically connecting a...

AI Technical Summary

Problems solved by technology

The existing non-contact power supply device and the rechargeable battery use wireless communication for data communication, so as to transmit information such as battery charging status and control instructions. However, because the normal use of peripheral electronic components often becomes a source of interference, the wireless Communication is susceptible to interference, causing signal distortion, affecting data transmission, and ultimately affecting charging efficiency

[0003] On the other hand, since there is no physical connection between the power supply terminal and the receiving terminal in the non-contact charging system, it is difficult to ensure that the position of the transmitting coil and the receiving coil is fixed if the alignment structure is not adopted. Therefore, during the charging process, due to the gas between the coils Influenced by changes in parameters such as gaps, the stability and reliability of the system output cannot be guaranteed.

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