China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Stepper motor is an electric motor that is stepped driven by turning a magnet inside the motor. The magnet type is usually made of rare earth neodymium or samarium cobalt, and in some application scenarios, the magnet may appear in the vicinity of the stepper motor, so will the magnet interfere with the stepper motor?
Stepper motor bonded neodymium rotor magnet multipolar
External magnets may potentially interfere with stepper motors, including triggering positioning errors or out-of-step, altering motor torque characteristics, distorting sensor signals, and affecting closed-loop control accuracy.
Positioning error or out of step: A strong external magnetic field may change the magnetization direction of the rotor permanent magnets, resulting in an abnormal magnetic field distribution inside the motor, causing positioning error or out of step.
Alteration of motor torque characteristics: If the external magnetic field is superimposed on the magnetic field of the stator coil, the torque characteristics of the motor may be altered (e.g., torque fluctuation, loss of output power).
Sensor interference: If the motor is equipped with Hall sensors or encoders, the external magnetic field may distort the sensor signals, affecting the closed-loop control accuracy.
Creates additional resistance or suction: If the magnet is close to a rotating part of the stepper motor, such as the motor rotor or housing, it may exert additional magnetic suction, increasing the load on which the motor operates, affecting rotational efficiency, and possibly even causing the motor to stall.
Therefore, the interference of magnets on stepper motors exists, which may be short-lived or last for a long time, depending on the distance between the magnet and the motor and the magnetic field strength. However, through reasonable layout, magnetic shielding, optimizing motor design and adjusting control system parameters, the influence of magnets can be effectively reduced to ensure stable operation of stepper motors.
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