The invention discloses an auxiliary circuit, a wireless charging receiving end and a wireless charging system, and the auxiliary circuit comprises a voltage dividing and rectifying circuit which is connected to a receiving coil in a power circuit so as to obtain an AC voltage, rectifies the AC voltage into a DC voltage, and carries out the voltage dividing of the DC voltage; the input end of the filter circuit is connected to the voltage dividing and rectifying circuit so as to obtain the direct-current voltage and filter the direct-current voltage; the input end of the protection switch circuit is connected to the output end of the filter circuit, the output end of the protection switch circuit is connected to a power down tube in the power circuit, the protection switch circuit is used for obtaining the filtered direct-current voltage, and when the output voltage is larger than or equal to the preset voltage, the protection switch circuit is switched on to drive the power down tube to be switched on. Compared with the prior art, when the vehicle end power supply is abnormally powered down, the power down tube is stabilized, the impact current is prevented from damaging the receiving end equipment, and the safety and the stability during wireless charging are improved.
本发明公开了一种辅助电路、无线充电接收端及无线充电系统,辅助电路包括:分压整流电路,分压整流电路连接于功率电路中的接收线圈以获取交流电压,并将交流电压整流为直流电压且对直流电压进行分压;滤波电路,滤波电路的输入端连接于分压整流电路以获取直流电压,并为直流电压进行滤波;保护开关电路,保护开关电路的输入端连接至滤波电路的输出端,保护开关电路的输出端连接至功率电路中的功率下管,用以获取经滤波后的直流电压,当输出电压大于等于预设电压时,保护开关电路导通以驱动功率下管导通。与现有技术相比,本发明能够在车端电源异常掉电时,稳定功率下管,防止冲击电流损坏接收端设备,提升了无线充电时的安全性和稳定性。
Auxiliary circuit, wireless charging receiving end and wireless charging system
一种辅助电路、无线充电接收端及无线充电系统
2024-06-04
Patent
Electronic Resource
Chinese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
Wireless charging receiving circuit and wireless charging device
European Patent Office | 2023
|European Patent Office | 2023
|European Patent Office | 2024
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