The difference between three-phase DC frequency conversion wave pump and ordinary frequency conversion wave pump
1、What is the difference between a three-phase DC variable frequency water pump and an ordinary DC water pump?
The three-phase DC water pump means that the winding of the water pump is three pairs of poles, the water pump adopts sensorless driving, and a pair of windings in the three pairs of windings are continuously energized, and a counter electromotive force is generated in the rotating magnetic field to detect the position of the magnet. To achieve the purpose of commutation, the circuit board can be externally placed, so that the pump body can withstand high temperatures. The three-phase DC water pump and the AC three-phase water pump are two completely different concepts, and the power supply mode is the same as that of ordinary DC. The pump start mode is soft start and the drive has no impact. It can be powered directly by solar panels.
Ordinary DC water pump is a two-phase DC water pump which refers to a water pump with two windings. This type of water pump needs to switch the direction of the winding current of the water pump to reach the maximum rotation speed of the pump. The current is more than twice the operating current.
2、The difference between three-phase DC speed regulation mode and ordinary speed regulation mode
The three-phase DC speed-regulating pump adopts PWM or 0-5V analog signal speed regulation. Its main principle is to change the ratio of energization and non-energization of the pump in unit time by adjusting the duty ratio, thereby changing the speed of the pump, the input of the pump. The voltage does not change.
The way in which a normal DC water pump regulates the speed is to directly change the magnitude of the input voltage.
3、The difference between the three-phase DC frequency conversion wave pump and the common wave pump
The three-phase DC frequency conversion wave pump mainly controls the power supply and power failure time of the water pump through the program. The pump will start frequently to achieve the purpose of wave making. The time interval is different for different waves. Because the pump uses soft start, no Impact, frequent start will not cause the life of the pump to decrease.
Ordinary DC variable frequency wave pump is also to change the power supply and power off time interval of the pump to achieve the purpose of wave making, but the frequent DC power supply and power failure will continue to produce impact (more than 2 times the working current), this will This makes it very easy to control electronic components.
Three-phase variable frequency wave pump has self-protection function such as stuck protection, overload protection, over current protection, etc.
Ordinary variable frequency wave pump does not have such a function
The life of the three-phase DC variable frequency wave pump can reach more than 5 years.
Ordinary frequency conversion wave pump life of about six months