Introduction to the role of the stator and rotor in a brushless motor - collect this information!

　　 Brushless motor stator and rotor Composed of permanent magnets with a certain number of magnetic poles embedded on the surface or inside the iron core. Most permanent magnets are made of rare earth permanent magnet materials with high coercivity, such as neodymium, iron, and boron, and high permeability magnetic flux density. The permanent magnets of this rotor are similar to those of brushed motors, both of which can generate sufficient magnetic fields in the air gap of the motor. The difference is that the permanent magnets of brushed motors are installed on the rotor, while those of brushless DC motors are installed on the stator. The rotor system structure of brushless DC motors mostly adopts different surface bonding magnets, also known as tile magnets, with surface-bonded rare earth permanent magnets, i.e., radially magnetized tile-type permanent magnets, bonded to the outer surface of the iron core. Through reasonable design, a square wave form of air gap magnetic flux density can be obtained.

　　What is the injection molding process for brushless motor stators and rotors? Metal inserts are placed in the mold, and then BMC plastic is injected and heated to 160 degrees. The power of the motor should be selected according to the power required by the equipment, so that the motor runs under rated load as much as possible. Pay attention to the following two points when selecting.

　　(1) If the motor power is too small, the phenomenon of "a small horse pulling a big cart" will occur, causing the motor to be overloaded for a long time, causing its insulation to be damaged due to heat generation, and even the motor to be burned out. (2) If the motor power is too large, the phenomenon of "a big horse pulling a small cart" will occur, and its output mechanical power cannot be fully utilized, and the power factor and efficiency are not high, which is not only unfavorable to users and the power grid, but also will cause waste of electricity.

　　What are the stator and rotor of a brushless motor? The inside of the motor is mainly composed of two parts: the stator and the rotor. I believe everyone has heard of this. The fixed part is called the stator, and the rotating part is called the rotor. Other components include the driver, end cap, fan blades, and housing.

　　What is the function of the stator and rotor of a brushless motor?

　　1. The main management function design of the stator is to generate a magnetic field, which is composed of an iron core, coil windings, and a base, etc. The coils are distributed in the stator iron core, and when current passes through, it generates an induced electromotive force, and electrical energy can be converted.

　　2. The rotor is mainly composed of an iron core, a shaft, windings, and magnets, etc. As part of the motor magnetic circuit, its main function is to induce electromotive force, electromagnetic torque, the shaft supports the weight of the rotor, transmits torque, and is the main component for outputting mechanical power.

　　Strictly speaking, both the stator and rotor of a brushless motor have magnetic fields. The difference is that the rotor generates magnetism through electrical conversion, and the stator generates electricity through magnetic conversion. Both of these are called armature magnetic fields. During the process of changing the phase sequence of the motor stator power supply, the stator magnetic field also changes, and the motor keeps rotating.

　　According to the shape of the coil winding and the wiring and embedding method, the stator windings can be divided into concentrated and distributed types. Concentrated windings are relatively simple in winding and embedding, but have low efficiency and poor operating performance. At present, most AC motor stators use distributed windings. According to different machine types, models, and winding process conditions, motors have different winding types and specifications, so their winding technical parameters are also different.