1. Brushless DC pump: pump, coil and commutator rotation, magnetic steel and a carbon brush does not turn, direction of the coil current replacement change is with the rotation of the electric motor commutator and brush to complete, as long as the rotation of the motor carbon brush will produce wear, computer pump operation to certain time, carbon brush wear gap becomes larger, voice will increase, after hundreds of hours of continuous operation brush is not to change.
Advantage: low price.
2. Brushless DC motor pump: motor brushless DC motor is the use of Brushless DC motor coupled with the impeller after the composition of the. The shaft of the motor and the impeller even together, between the stator and the rotor of the pump is a gap, use time long water penetration into the motor inside the motor is easy to be burnt.
Advantages: brushless DC motor has been standardized, there are a large number of specialized manufacturers of production, low cost, high efficiency.
3. No brush DC magnetic drive pump: no brushless DC pump adopts the electronic commutation component, without the use of carbon brush commutation, with features of high wear-resistant ceramic shaft and ceramic sleeve, sleeve after the injection molding and the magnet are connected as a whole is to avoid the wear and tear, so there is no brush DC magnetic pump life has been greatly enhanced. Isolated magnetic pump stator some and rotor are completely isolated, the stator and the circuit board some of the epoxy resin, 100% waterproof, rotor some of the permanent magnet and the pump body by environmental protection material, low noise, small size, the function is stable. The parameters can be adjusted through the winding of the stator, and can be operated with wide voltage.
Advantages: long life, low noise up to 35dB, can be used for hot water cycle. The motor stator and the circuit board some of the epoxy resin potting and completely isolated from the rotor and can be installed under the water and completely waterproof, the pump axis with high functional ceramic shaft, high precision, shock resistance.
