The three-phase DC water pump means that the winding of the water pump is three pairs of poles. The pump is driven by sensorless. Among the three pairs of windings, one pair of windings will not be energized, and the back electromotive force is generated in the rotating magnetic field.

This detects the position of the magnet to achieve the purpose of commutation. The circuit board can be externally mounted so that the pump body can withstand high temperatures. Three-phase DC water pump and AC three-phase water pump are two completely different concepts.

The formula is the same as ordinary DC. The start mode of the water pump is soft start, and the drive has no impact. It can be powered by solar panels directly.