The brushless DC water pump uses the principle of a permanent magnet brushless DC motor, and an impeller is added to the rotor. The outer casing structure is designed to make the liquid centrifugally move. Since there is no carbon brush friction, no spark is generated. High efficiency, low power consumption, long life and low noise compared to brushed motors.

　　The three-phase brushless DC water pump adopts a six-slot stator, that is, there are three pairs of magnetic fields. The pump is controlled by MCU, and the intelligent detection position is used for commutation. No additional sensors are needed, so the pump body can be placed without any electronic components, outside the circuit board. Placed and sealed with a heat-dissipating aluminum shell, the high temperature generated by the eddy current inside the pump body will not affect the circuit board. After the pump circuit board is externally placed, the materials inside the pump body are all replaced with high temperature resistance and can be used in boiling water of 100 degrees or more. The pump has reverse connection protection, stuck protection, over-current and over-voltage protection, intelligent program or manual speed regulation. And the same volume of water pump driven by three-phase control can be much higher than two-phase pump. (Three-phase DC and three-phase AC are completely different concepts. The three-phase DC power supply is the same as ordinary DC, one positive and one negative, and three-phase AC is three lines. Three-phase DC is realized by using one phase missing. Sensorless position detection, so that the internal sensor of the pump can be removed. Generally speaking, the three-phase DC can be called a brushless DC sensorless smart water pump.

　　The two-phase DC water pump uses Hall elements to detect the position and then commutate through the drive board. The pump control circuit board is built in, the Hall sensor is used to detect the position and provide the commutation signal, and the higher the power, the higher the temperature generated by the eddy current in the pump body, sometimes it will reach 100 degrees or more, but in general, the temperature resistance of the electronic components Both are about 85 degrees, so the two-phase DC water pump generally only has a current of 2A or less, and the water temperature is preferably not more than 60 to 70 degrees, otherwise the reliability of the pump cannot be guaranteed.

Performance comparison of two pumps:

1) Power：The two phases can only be used for currents up to 2A with a maximum power of 50W. The three phases can be more than 2A and the maximum power is 95W.

2) Temperature resistance：The two phases are only 85 degrees high and the three phases can reach 100 degrees (the three-phase circuit board is external, so it can be used at high temperatures).

3) Impact resistance：There is an impact when the two phases are commutated, there is a large starting current, the three phases are program reversing, no impact, and it is a soft start, and the starting power consumption is small.

4) Protection：The three-phase DC water pump has rotor jam protection, reverse connection protection, overload protection, and overcurrent protection.

5) Shock resistance：The two phases are the commutation of the Hall element detection position, and the earthquake resistance is not strong. The three-phase DC is programmed for commutation and has strong shock resistance.

6) Controllability：The two-phase DC water pump can only be adjusted by adjusting the voltage. When the system wants to control the program, it is difficult to implement and the cost is high. The three-phase water pump can also change the speed by adjusting the voltage, but the three-phase DC water pump can realize PWM speed regulation, analog signal input speed regulation, potentiometer manual speed regulation, can realize the head and flow regulation, and the response is fast, and it is very realized. easy.

7) Diving：Both amphibious and submersible, can or do not dive (installation position is lower than the water surface).