First, what is the three-phase DC inverter pump, and the difference between ordinary DC pump

Three-phase DC pump refers to the pump winding is three pairs of poles, the pump uses sensorless drive, three pairs of windings will continue to loop a pair of windings is not energized in the rotating magnetic field generated back-EMF, in order to detect the magnet position To achieve the purpose of commutation, the circuit board can be external, so the pump can withstand high temperatures, three-phase DC pump and AC three-phase pump is two completely different concepts, the power supply and ordinary DC. Pump start-up mode for soft-start, drive-free impact. Solar panels can be used directly.

Ordinary DC pump is the two-phase DC pump refers to the winding is 2 pairs of pumps, this pump need to switch the pump through the sensor current direction of the winding has reached the purpose of driving the magnet rotation, the pump reaches the maximum speed as soon as it starts, the impact Current is more than 2 times the operating current.

Second, the three-phase DC speed control mode and ordinary speed difference

Three-phase DC speed control pump using PWM or 0-5V analog signal speed control, the main principle is to adjust the duty cycle to change the pump in the unit of time the proportion of electricity and no electricity, thus changing the pump speed, pump input The same voltage.

Ordinary DC pump to adjust the speed of the way is to directly change the size of the input voltage.

Third, three-phase DC variable frequency wave pump made waves and ordinary waves made waves difference

Three-phase DC variable frequency wave pump is mainly through the program control of the pump power and power-off time, the pump will frequently start to achieve the purpose of making waves, the time interval of different wave size is different, because the pump is soft-start, no Impact, frequent start does not cause the pump to reduce the life expectancy.

Ordinary DC variable frequency wave pump is also to change the pump power and power off time interval to achieve the purpose of making waves, but the ordinary DC pump frequent power-on and power-off will continue to produce the impact (more than 2 times the current), so will Lead to control of electronic components is very easy to failure.

Fourth, the protection function

Three-phase variable frequency wave pump with card stuck protection, overload protection, over-current protection and so on self-protection

Ordinary frequency conversion wave pump is not such a function

Five, life expectancy

Three-phase DC variable frequency wave pump life expectancy can reach more than 5 years

General frequency wave pump life of about six months