A wireless charging control method and wireless charging system
A technology of wireless charging and control methods, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of slow output response, fluctuation of output current, and steep change of gain adjustment, and achieve improved control accuracy and stable power. Control, adjust the effect of smooth gain change
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specific Embodiment 1
[0057] figure 1 It is a schematic flow chart of the wireless charging control method of the present invention, refer to figure 1 ,
[0058] The wireless charging control method proposed by the present invention mainly includes the following steps:
[0059] S1: wireless transmitting step, used for rectifying and filtering the alternating current connected to the power grid through a transmitting terminal, and the high-frequency alternating current generated by the inverter link excites the transmitting coil to generate an alternating electromagnetic field;
[0060] S2: The wireless receiving step is used to pick up energy from the alternating electromagnetic field generated by the transmitting coil through the receiving coil of a receiving end by using the magnetic field coupling effect, and after being stepped down by a high-frequency transformer, it is converted into a DC power supply through rectification and filtering Loads, where loads include but are not limited to wire...
specific Embodiment 2
[0085] image 3 It is a flow chart of another preferred charging control step of the wireless charging control method in the embodiment of the present invention, as shown in image 3 As shown, only the differences between the two embodiments will be described below, and the similarities will not be repeated. This embodiment and figure 2 The differences in the illustrated embodiment approach are:
[0086] The control strategy in the embodiment of the present invention is to control by combining the dual voltage hysteresis interval with frequency adjustment and duty ratio or phase shift adjustment, wherein the sampling signal is the charging voltage of the load, and the hysteresis interval corresponds to the voltage hysteresis interval. Specifically, S3: the charging control step also includes:
[0087] S31: A step of obtaining the preset charging voltage V and the charging voltage U, and calculating the difference ΔU between the sampled charging voltage U and the preset char...
specific Embodiment 3
[0098] Figure 5 It is a schematic diagram of the second embodiment of the receiving end of the wireless charging system of the present invention, as shown in Figure 5 As shown, the following only describes the differences from the above two embodiments, and the similarities will not be repeated. This embodiment is similar to Figure 4 The implementation differs in that:
[0099] The rectifier circuit 23 is a full-bridge rectifier circuit, including diode D1, diode D2, diode D3 and diode D4. Diode D4 is connected in series with diode D1, diode D2 and diode D3 in parallel to form a "bridge" structure. Correspondingly, the high-frequency transformer 22 adopts no center tap group, and the transformer turns ratio is N:M, where N:M is the voltage transformation ratio between the primary side and the secondary side, and Figure 4 Compared with the embodiment: the rectifier circuit 23 of this embodiment needs four rectifier diodes, and the number of devices used is large, but the ...
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