Brushless DC magnetic drive pump magnet and impeller injection molding into one motor rotor, the rotor has a direct injection molded sleeve in the middle, high-performance ceramic shaft fixed in the housing, the motor stator and circuit board part of the epoxy resin Plastic potting in the pump body, the stator and the rotor has a thin-walled isolation, without the need to be accompanied by the traditional mechanical shaft seal, which is completely sealed. Motor torque is through silicon steel (stator) on the coil after the magnetic field generated by the permanent magnet motor (rotor) work. The magnet is n (n is an even number) level of magnetization so that the magnet part of the mutual complete composition of the coupling magnetic system. When the magnetic pole of the stator coil and the magnetic pole of the magnet are oppositely polar, that is, the displacement angle between the two magnetic poles is Φ = 0, the magnetic energy of the magnetic system is the lowest; when the magnetic pole rotates to the same pole, that is, the displacement between the two magnetic poles Angle Φ = 2π / n, the magnetic system at this time the maximum magnetic energy. After removing the external force, due to the mutual exclusion of the magnetic poles of the magnetic system, the magnetic force will restore the magnet to the state with the lowest magnetic energy. So the magnet produces the movement, drives the magnetism rotor to rotate. Brushless DC pump through the electronic commutation, without the use of carbon brushes, magnet rotor and stator silicon steel has multi-stage magnetic field, when the relative rotation of the magnet rotor relative to the stator will automatically change the direction of the pole, the rotor always remain the same level of exclusion, So that brushless DC magnetic isolation pump has a higher speed and efficiency. Magnetically isolated pump stator and rotor completely isolated, completely avoiding the traditional motor-type brushless DC water pump there is the problem of liquid leakage. And can be completely submersible and fully waterproof, effectively improve the life of the pump and performance.
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