1. Brushed DC water heater pump:
When the pump is working, the coil and the commutator rotate, the magnetic steel and the carbon brush do not rotate, and the alternating change of the coil current direction is completed by the commutator and the brush that the motor rotates. As long as the motor rotates the carbon brush, it will wear out. When the computer pump runs to a certain extent, the carbon brush wear gap will increase and the sound will increase accordingly. After several hundred hours of continuous operation, the carbon brush will not play the role of reversing.
Advantage: low price.
2. Brushless DC water heater pump (motor type):
The motor type brushless DC water pump is composed of a brushless DC motor and an impeller. The shaft of the motor is connected with the impeller. There is a gap between the stator and the rotor of the water pump. When the water is used for a long time, the water will penetrate into the motor and increase the possibility of motor burnout.
Advantages: Brushless DC motors have been standardized, and there are a large number of specialized manufacturers, which are relatively low in cost and high in efficiency.
3. Brushless DC magnetic isolated water heater pump:
The brushless DC pump uses electronic components for commutation, eliminating the need for carbon brush commutation, and uses high-performance wear-resistant ceramic shafts and ceramic bushings. The bushing is integrated with the magnet by injection molding to avoid wear, so the life of the brushless DC magnetic pump is greatly enhanced. The stator part and the rotor part of the magnetically isolated water pump are completely isolated, and the stator and circuit board parts are sealed with epoxy resin and 100% waterproof. The rotor portion is made of a permanent magnet. The pump body is made of environmentally friendly materials, with low noise, small size and stable performance. Various required parameters can be adjusted by winding the stator and can be operated at a wide voltage.
Advantages: It has a long life and low noise of up to 35dB, which can be used for hot water circulation. The stator and circuit board sections of the motor are encapsulated with epoxy and completely isolated from the rotor. It can be installed underwater and completely waterproof. The shaft of the pump is made of high-performance ceramic shaft with high precision and good shock resistance.
4. Three-phase AC water pump
The three-phase AC water pump is driven by a three-phase AC motor. Unlike DC systems, solar AC pumps consist of a solar array (providing power), a solar pumping inverter (converting DC to AC, while controlling the motor frequency) and a three-phase AC motor pump.
The three-phase AC water pump in the system can be replaced with the market-listed electric or diesel engine to drive the AC water pump, and the compatibility is very good. At the same time, the AC pump surge DC pump power limit. Power can be used from 150 watts to 105 kW. It is suitable for large areas of farmland, desert management and irrigation.