Water pumping system based on wireless inductive charging

This design is the winning entry of the Guangzhou Six School League, and the competition title is a water pumping system based on wireless inductive charging. The participating team is Maomao from Sun Yat-sen University and does not need to go to the university team.

Question requirements

Water pumping system based on wireless inductive charging:

        Design and produce a water pumping system based on wireless inductive charging. The water pumping system uses a pumping motor or pump powered by DC voltage. The vertical height difference between the water inlet liquid level and the water outlet is at least 1m. The cross-sectional area of ​​the water pumping hose is not limited. Schematic diagram As shown below. The wireless charging device uses inductive coil coupling. The outer diameter of the transmitting coil of the circular wireless charging device is not greater than 20cm. The distance between the receiving coil and the transmitting coil is at least 6mm. Only super farad capacitors are used as charging and energy storage components of the water pumping system. The wireless charging system is powered by a 5V DC regulated power supply, the output current does not exceed 1A, and the charging time does not exceed 60s. 

       Please refer to the attachment for detailed question requirements.

Question analysis

        According to the requirements of the topic, a 5V 1A power supply needs to be used to charge the capacitor, and then the electric energy stored in the capacitor is used to drive the water pump to pump water. In this process, the efficiency of transferring and storing energy needs to be improved as much as possible.

        The main components of the system we designed are: charging indicator light, boost circuit, wireless charging circuit, super farad capacitor bank, and DC water pump. The current provided by the power supply passes through these components in sequence, and finally stores energy in the capacitor bank, which supplies energy to the water pump to pump water when the button is pressed.

        The indicators we achieved are:

(1) By displaying whether it is in charging state

(2) Start pumping by pressing the button

(3) Pumping capacity is 750ml

Schematic design instructions

        Our system is mainly built using modules, and the selected module parameters are as follows:

        (1)