Excellent performance of EC water pump

The EC water pump has very excellent control performance. This is because: First, due to the high performance of the permanent magnet material, the torque constant, torque inertia ratio, and power density of the motor are greatly improved. Through reasonable design, the moment of inertia, electrical and mechanical time constant and other indicators can be greatly reduced, and the main indicators of intelligent control performance have been greatly improved. Second, the design of the modern permanent magnet magnetic circuit is relatively perfect, and the coercive force of the permanent magnet material is high, so the anti-armature reaction and anti-demagnetization ability of the permanent magnet motor are greatly enhanced, and the control parameters of the motor vary with the external Disturbance effects are greatly reduced. Third, since the permanent magnet is used to replace the electric excitation, the design of the excitation winding and the excitation magnetic field is reduced, thereby reducing the excitation flux, the excitation winding inductance, the excitation current and many other parameters, thereby directly reducing the controllable variables or parameters.

Advantages of EC water pump (I) Excellent torque characteristics, good medium and low torque performance, large starting torque, small starting current, and large output; (2) Stepless speed regulation, wide speed regulation range, strong overload capacity; soft Soft start and stop, good braking performance, can save the original mechanical brake and electromagnetic brake device; (3) small loss, high efficiency, because the permanent magnet excitation is used, the loss caused by the excitation current of the induction motor is eliminated; (4) At the same time, the EC motor works in a synchronous operation mode, which eliminates the frequency loss of the rotor core of the induction motor. These two aspects make the operating efficiency of the EC much higher than that of the induction motor, and the efficiency of the small-capacity motor is improved more significantly; (5) Power High factor, because the excitation magnetic field of the EC motor does not require the reactive current of the power grid, so its power factor is much higher than that of the induction motor, and the EC motor can run at I power factor; (6) Compared with the induction motor, the EC motor not only has a rated load It has higher efficiency and power factor, and has more advantages at light load. At present, the country advocates energy saving and emission reduction. The emergence of EC water pumps can improve efficiency by more than 10-15% compared with traditional variable frequency pumps, which is of great significance for energy saving.

The EC water pump drive motor has a built-in intelligent control module, which is easy to control, and can also realize functions such as wireless communication, group control, and remote control. At present, many water pumps use frequency conversion to adjust the flow rate. This type of frequency converter mainly relies on imports and is expensive. , and the matching between the structure and the control method is not good, and it is difficult to truly realize intelligent control. It is of great advantage to use EC motor-driven water pump instead of induction motor drive.