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Rotor problems in permanent magnet motor applications
source：未知 time：2024-09-11 14:06nbsp; click：
Different motor products have different advantages and applicability. Due to different working conditions, the requirements for motor product parts are also different. For example, for heavy-load working conditions, there are special requirements for motor bearings and shafts. For places with dense personnel, the vibration and noise requirements of the motor are relatively strict; when the environment is dusty, the protection level of the motor must meet the necessary protection requirements. Under the guidance of the overall policy of energy conservation and low carbon, the market prospects of high-efficiency motors are relatively optimistic. However, for permanent magnet motors with relatively high efficiency levels, due to some specific failure factors, there are certain limitations in their application in some specific occasions. One of the more typical problems is the demagnetization or shedding of the rotor magnet. We have also had a special discussion on the demagnetization problem of permanent magnet motors. The main reasons are high temperature and high current. The high temperature problem may be related to the design and application of the motor itself, but a factor that cannot be ignored is the motor's bore sweeping problem. When the motor has a bore sweeping problem, it will cause severe heat due to the friction between the stator and the rotor, which will directly lead to the demagnetization of the magnet. When the magnet loses magnetism, the reliability of the connection with the fixed bracket will deteriorate, and the problem of magnet shedding will derive.