Constant-voltage/constant-current charging EC-WPT system for unmanned aerial vehicle and parameter design method

Abstract

The invention provides a constant-voltage / constant-current charging EC-WPT system for an unmanned aerial vehicle and a parameter design method, the constant-voltage / constant-current charging EC-WPT system comprises a transmitting end and a receiving end, and the transmitting end is provided with a direct-current power supply, a high-frequency inverter, a variable-structure LC resonance network and two energy transmitting polar plates; the receiving end is provided with two energy receiving polar plates, a CLC-n type resonance network, a rectification filter circuit and an electric load; the variable structure LC resonance network comprises an inductor L1, a capacitor C1c, a capacitor C1v and a switch element K; when the system needs constant current output, the switching element K is switched off, and the high-frequency inverter outputs a high-frequency inversion signal according to a first system working angular frequency omega cc; and when the system needs constant voltage output, the switching element K is closed, and the high-frequency inverter outputs a high-frequency inversion signal according to the second system working angular frequency omega cv. The invention has the advantages that: the system can realize constant output under the condition of load change, and can still realize constant output under the condition of offset of the coupling mechanism.

Description

technical field [0001] The invention relates to wireless power transmission technology, in particular to a constant voltage / constant current charging EC-WPT system and a parameter design method for unmanned aerial vehicles. Background technique [0002] Unmanned aerial vehicle is an unmanned aerial vehicle that can be controlled by programming or wireless remote control to perform a variety of tasks and can be reused, referred to as unmanned aerial vehicle (UAV). UAVs have the advantages of low cost, low loss, safety and flexibility. Whether in civilian, military or scientific research fields, UAVs are playing an increasingly important role. Among the many technical indicators for evaluating the performance of UAVs, endurance is undoubtedly one of the most critical technologies for UAVs. For drones, having a longer endurance means that it can complete its assigned tasks more quickly and efficiently, avoiding risks such as crashes due to insufficient power. From an energy p...

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Problems solved by technology

However, the above resonant network can only achieve constant voltage output or constant current output, which is oriented to the actual application of constant current / constant voltage power supply and its mode switching requirements; Switching of current / constant voltage working mode; Chinese patent 202010309224.6 uses a variable structure LC-CLCL resonant network to enable the system to switch between constant current / constant voltage working mode

These two topologies have more components at the receiving end, and the switching switch is also installed at the receiving end. If it is applied to the charging of drones, the flight load of drones will be relatively large.

[0006] In addition, when the UAV is performing autonomous wireless charging, it often has a certain deviation due to inaccurate positioning or environmental factors; the receiving end of the UAV charging system should also be designed with a lightweight design to reduce the UAV The load during normal work, the existing technology can not fully meet the above requirements, so it is necessary to further optimize the constant voltage / constant current charging system of the UAV

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