An overvoltage protection method, overvoltage protection circuit and wireless charging system
An overvoltage protection circuit and wireless charging technology, which is applied in the direction of circuit devices, battery circuit devices, collectors, etc., can solve problems such as damage to charging equipment and high voltage at the receiving end of power consumption, and achieve the effect of improving reliability
Active Publication Date: 2021-07-27
MAXIC TECHNOLOGY CORPORATION
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Problems solved by technology
However, in this wireless charging system, due to the resonance process of charging and discharging of the resonant circuit, the output voltage of the power receiving end will be too high, which will cause damage to the charging equipment.
Therefore, how to set up an overvoltage protection circuit that can work stably, be reliable and safe, and have high resource utilization, so as to improve the reliability of the wireless charging system operation, is a technical problem.
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[0062] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without...
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The present application provides an overvoltage protection method, an overvoltage protection circuit and a wireless charging system. The overvoltage protection method includes: monitoring the output voltage output by the rectifier circuit in the wireless charging system; if the output voltage exceeds a preset first An overvoltage voltage threshold and the duration exceeds the preset first time threshold, turn off the positive half-bridge circuit of the rectifier circuit, and turn on the negative half-bridge circuit of the rectifier circuit, so that the wireless charging system The resonant power signal output by the resonant circuit is discharged through the loop formed by the turned-on negative half-bridge circuit. It can effectively improve the reliability of the operation of the wireless charging system.
Description
technical field [0001] The present application relates to the technical field of wireless charging, in particular, to an overvoltage protection method, an overvoltage protection circuit and a wireless charging system. Background technique [0002] With the wide application of new energy vehicles and mobile electronic devices, the wireless charging technology for wireless charging of new energy vehicles and mobile electronic devices to improve their convenience has been developed rapidly. At present, in the wireless charging system, by setting the transmitting coil including the inductance coil and the resonant capacitor at the charging end, and setting the receiving coil including the inductance coil and the resonant capacitor at the power receiving end, the transmitting coil and the receiving coil form a resonant circuit, through the inductance The coil and the resonant capacitor charge and discharge each other, thereby generating an alternating magnetic field on the induct...
Claims
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IPC IPC(8): H02J7/00H02J50/12
CPCH02J50/12
Inventor 郭越勇赵利杰
Owner MAXIC TECHNOLOGY CORPORATION