Types of solar submersible pumps 1. Brushed solar submersible pumps, 2. Brushless DC solar submersible pumps (motor type).

The characteristics of the three types of solar submersible pumps:
1, brushed solar submersible pump
When the water pump is working, the coil and commutator rotate, and the magnet and carbon brush do not rotate. The alternating current direction of the coil is completed by the commutator and brush as the motor rotates. As long as the motor rotates, the carbon brush will wear out. When the computer water pump runs to a certain extent, the carbon brush wear gap becomes larger, and the sound will increase accordingly. After hundreds of hours of continuous operation, the carbon brush can no longer play a role in commutation.

Advantages: low price.

 2, brushless motor solar submersible pump
The motor-type brushless solar submersible pump is composed of a brushless DC motor and an impeller. The shaft of the motor is connected to the impeller, and there is a gap between the stator and the rotor of the water pump. If it is used for a long time, water will penetrate into the motor and the motor will easily burn out.

Advantages: The brushless DC motor has been standardized, with low cost and high efficiency.

3. Brushless DC magnetic drive solar submersible pump
The brushless DC water pump adopts electronic component commutation, without carbon brush commutation. It adopts wear-resistant ceramic shaft and ceramic bushing. The bushing is integrated with the magnet through injection molding to avoid wear. Therefore, the brushless DC magnetic water pump The life span is enhanced. The stator part and the rotor part of the magnetically isolated water pump are completely isolated. The stator and circuit board parts are potted with epoxy resin, which has good waterproof performance. The rotor part adopts permanent magnets. The water pump body adopts environmentally friendly materials, with low noise, small size and performance. stability. Various required parameters can be adjusted through the winding of the stator, and it can be operated at a wide voltage.

Advantages: long life, low noise can reach 35dB or less, high temperature resistance, can be used for hot water circulation. The stator and circuit board of the motor are potted with epoxy resin and completely isolated from the rotor, which can be installed underwater and waterproof. The shaft of the water pump is made of ceramic shaft, which has good shock resistance.

The difference between brushless motor and brushed motor in this paragraph
(1) It is not easy to produce high-temperature arc and metal chips during commutation.

(2) Less electrical noise, high reliability, long life and high speed.

(3) Low voltage, fast starting and easy control.

(4) Easy to manufacture and small in size.

(5) Applicable to high temperature environment and low maintenance cost.

(6) No dirt such as carbon powder, oil mist, etc. is produced in the brush part.

(7) No electrical noise (no electric wave interference).

(8) No sparks are generated.

(9) No flash over.