Frequency tracking device, method and system of wireless-charging transmitting end
A technology of frequency tracking and wireless charging, which is applied in the direction of circuit devices, electromagnetic wave systems, battery circuit devices, etc., can solve the problems of low wireless charging efficiency, and achieve the effects of easy promotion and popularization, good frequency matching, and improved efficiency
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Example Embodiment
[0022] Embodiment 1. For the frequency tracking device of the wireless charging transmitter in this embodiment, see figure 1 As shown, it includes: a frequency tracking part circuit 11 , a high frequency inverter part circuit 12 and an LC resonant antenna 13 which are connected in sequence. The frequency tracking part circuit 11 is used to capture the phase difference between the voltage and the current, and output to the high frequency inverter part circuit 12; the high frequency inverter part circuit 12 is used to generate a frequency offset of the output signal according to the phase difference; LC The resonant antenna 13 is used to transmit radio frequency signals to the outside according to the shifted signal frequency.
[0023] In order to further illustrate the circuit structures of the frequency tracking part circuit 11 , the high frequency inverter part circuit 12 and the LC resonant antenna 13 , in this embodiment, but not limited to: figure 2 circuit structure sho...
Example Embodiment
[0027] Embodiment 2. For the wireless charging transmitting system of this embodiment, see image 3 As shown, it includes: a charging transmitting device 21 and a charging transmitting antenna 22 connected to each other, and a frequency tracking device 23 resonating with the charging transmitting antenna 22 . The frequency tracking device 23 can be the frequency tracking device of the wireless charging transmitter shown in Embodiment 1. In an actual product, the frequency tracking device 23 can be located inside the charging transmitter 21 to track the frequency of the wireless radio frequency signal sent by the charging transmitter antenna 22. . The charging and transmitting device 21 transmits radio frequency signals to the outside through the charging and transmitting antenna 22 .
[0028] In the actual installation process, the charging and transmitting device 21 of the transmitting system is installed at the front end of the parking space. The ground charging device borr...
Example Embodiment
[0029] Embodiment 3. The frequency tracking method of the wireless charging transmitter of this embodiment can be implemented by using the frequency tracking device of the wireless charging transmitter shown in the above-mentioned Embodiment 1, see Figure 5 shown, including the following main steps:
[0030] S31. Capture the phase difference between the voltage and the current.
[0031] S32. Adjust the frequency of the output signal according to the phase difference.
[0032] S33. Transmit a wireless radio frequency signal to the outside according to the adjusted signal frequency.
[0033] In a specific implementation, the high-frequency inverter part mainly includes a high-frequency inverter and a PWM driver. The high-frequency inverter uses a resonant inverter, and uses a resonant inductor instead of a transformer to transfer energy, which reduces the loss of the transformer and can improve the distance of wireless transmission. The PWM driver is mainly used to amplify t...
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