Solar water pump classification and advantages

Solar water pumps, also known as photovoltaic pumps, are used effectively in sun-rich areas, especially in remote areas where there is no electricity or electricity, and the use of readily available, inexhaustible solar energy provides a highly economical and highly reliable water supply. Utilize the power from solar cells to drive high-efficiency pumps with DC, permanent magnet, brushless, position sensorless, stator-rotor double-plastic motor or high-efficiency asynchronous motor or high-speed switch reluctance motor driven by devices such as maximum power point tracking and conversion and control. Raise the water from the depth of the ground to the ground for irrigation of farmland or human and animal consumption.

Solar pump types are mainly divided into: brush DC solar water pump, brushless DC solar water pump (motor type), brushless DC solar water pump (magnetic drive isolation).


First, brush DC solar water pump:

When the pump works, the coil and commutator rotate, and the magnetic steel and carbon brush do not turn. The alternation of coil current direction is accomplished by the commutator and the brush that the motor rotates. As long as the motor rotates, the carbon brush will wear out. When the computer water pump runs to a certain time, the carbon brush wear gap becomes larger and the sound will increase. After a few hundred hours of continuous operation, the carbon brush cannot play the role of reversing.

Advantages: low prices.


Second, brushless DC solar water 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, and there is a gap between the stator and the rotor of the water pump. If the water is used for a long time, the water will infiltrate into the motor and increase the possibility of the motor being burned out.

Advantages: Brushless DC motor has been standardized, there are a large number of specialized manufacturers to produce, the cost is relatively low, high efficiency.


Third, brushless DC magnetic isolation solar water pump:

The brushless DC water pump adopts electronic component commutation and does not need to use carbon brushes for commutation. It adopts high-performance wear-resistant ceramic shafts and ceramic bushings. The shaft sleeve is integrated with the magnets through injection molding to avoid wear and therefore brushless DC magnetic force. The life of the pump has been greatly enhanced. The stator part and the rotor part of the magnetic isolation pump are completely isolated. The stator and the circuit board part are encapsulated with epoxy resin, 100% waterproof. The rotor part uses permanent magnets. The pump body is made of environmentally friendly materials, low noise, small size, and performance. stable. The stator windings can be used to adjust various desired parameters, allowing wide voltage operation.

Advantages: Long life, low noise up to 35dB, can be used for hot water circulation. The stator and circuit board part of the motor are encapsulated with epoxy resin and completely isolated from the rotor. It can be installed underwater and completely waterproof. The axis of the pump adopts high-performance ceramic shaft, which has high precision and good shock resistance.


Solar water pump is an optical-mechanical-mechanical integration system that has been rapidly developed in recent years. It has good long-term economic efficiency, especially compared with common diesel pumping, and it has the economic advantage of overwhelming. The development of solar water pumps, a new type of environmental protection and energy-saving product, will undoubtedly bring great economic and social benefits to the development of industries and the development of the economy, especially the development of modern agriculture in arid regions, in line with the construction of "resource-saving" and "environmentally friendly "Type" social development strategy and China's sustainable development strategy.