The anti demagnetization technology of permanent magnet direct drive motors mainly focuses on how to reduce or avoid demagnetization caused by various reasons during the operation of the motor. The phenomenon of demagnetization poses a great threat to the operational performance and equipment safety of motors, which may lead to motor overheating, damage, and even fire accidents. Therefore, anti demagnetization technology is of great significance in ensuring the stable operation of permanent magnet direct drive motors.

Firstly, from the perspective of motor design, special attention needs to be paid to the selection of permanent magnet materials and the thermal design of the motor in response to the demagnetization problem of permanent magnets under high temperature or specific working conditions. For example, the demagnetization curve of neodymium iron boron permanent magnet materials at high temperatures needs special attention to ensure that the working point of the permanent magnet is higher than the turning point of the demagnetization curve at maximum current, in order to prevent overall or local demagnetization from occurring. In addition, by using the finite element method to calculate the local operating points under maximum demagnetization, the risk of motor demagnetization can be more accurately evaluated.

Secondly, the motor control system is also an important part of anti demagnetization technology. Faults in the control system, such as controller failure, sensor failure, etc., can lead to motor demagnetization. Therefore, regular inspection and maintenance of the control system to ensure its normal operation is one of the key measures to prevent motor demagnetization.

In addition, the stability of the power supply system also has a significant impact on the magnetic field of the motor. The instability of power supply voltage, aging of power supply lines, and harmonic interference can all affect the magnetic field of the motor, leading to demagnetization. Therefore, optimizing the power supply system to ensure the stability of the power supply voltage and the good condition of the power supply line is also an important aspect of anti demagnetization technology.

Finally, changes in load may also cause instability in the motor magnetic field, leading to demagnetization. Therefore, reasonable load distribution and avoiding long-term overload or underload operation of the motor are also effective measures to prevent demagnetization.

In summary, the anti demagnetization technology of permanent magnet direct drive motors needs to be comprehensively considered and implemented from multiple aspects such as motor design, control system, power supply system, and load management. Through scientific design, strict manufacturing process, reasonable use and maintenance, the demagnetization phenomenon of permanent magnet direct drive motors can be effectively reduced or avoided, ensuring the stable operation and long-term use of the motor.

Hengda Electric has always been dedicated to the research and development, production, and service of permanent magnet direct drive motors. With advanced technology and equipment, lean manufacturing processes, reliable product quality, and satisfactory after-sales service, the company provides customers with the most suitable professional motor solutions and creates greater social value.