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At present, brushless DC blowers mostly use brushless DC motors. Due to the elimination of collector rings and excitation brushes, the structure of brushless DC motors is greatly simplified. It not only improves the technical performance of the motor, but also greatly enhances the mechanical reliability and lifespan of the motor. Moreover, compared with other motors, it also has excellent control performance. This is because due to the high performance of permanent magnet materials, the torque constant, torque inertia ratio, power density, etc. of the motor have been greatly improved.
Through reasonable design, indicators such as inertia and electromechanical time constant can be greatly reduced, and they have been greatly improved as the main indicators of servo control performance. The design of modern permanent magnet circuits has been improved, and the coercivity of permanent magnet materials is relatively high. Therefore, the armature reaction and demagnetization resistance of permanent magnet motors have been greatly improved, and the control parameters of the motor have also been greatly reduced under the influence of external interference.
Due to the use of permanent magnets instead of electric excitation, the design of excitation windings and magnetic fields has been reduced, thereby reducing parameters such as excitation flux, excitation winding inductance, and excitation current, and enabling control variables or parameters to meet design requirements. Directly restore. All these factors can be said to have good controllability for DC brushless blowers.