Cooling System of External Rotor Permanent Magnet Synchronous Motor for Crane
A permanent magnet synchronous motor and cooling system technology, which is applied to synchronous motors with static armatures and rotating magnets, electromechanical devices, cooling/ventilating devices, etc., can solve the problem of not meeting the cooling requirements of external rotor permanent magnet synchronous motors for cranes , the motor heat is taken away, inadvisable, etc., to achieve the effect of good cooling effect
Active Publication Date: 2017-11-28
中正屹安科技有限公司
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Problems solved by technology
However, this structure is not suitable for cranes with outer rotor permanent magnet synchronous motors. There are two main reasons: one is that the speed of cranes with outer rotor permanent magnet synchronous motors is very low, only a dozen revolutions per minute, and the cranes with outer rotor permanent magnet synchronous motors The axial length of the magnetic synchronous motor reaches 1000mm, so the cooling of the motor by the fan driven by the motor rotation cannot take away the internal heat of the motor; on the other hand, the protection level of the permanent magnet synchronous motor with an outer rotor for cranes requires IP54, so Cooling is not advisable
It can be seen that the design based on the traditional ventilation cooling structure cannot meet the heat dissipation requirements of the outer rotor permanent magnet synchronous motor for cranes
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[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:
[0031] The invention relates to a cooling system of an outer rotor permanent magnet synchronous motor for cranes, such as Figure 1-Figure 6 As shown, it includes a motor and a cooling air duct, and is characterized in that: the motor includes a stator core 5, a stator coil 2, a hollow shaft 6, a permanent magnet 4, and a rotor 3; the stator core 5 is arranged outside the hollow shaft 6, and the rotor 3 is arranged on the stator Outside the iron core 5 , the stator coil 2 is provided at the end of the stator iron core 5 , and the permanent magnet 4 is provided inside the rotor 3 .
[0032] figure 1 The overall schematic diagram of the cooling structure shown in the longitudinal section of the motor. The cooling air path includes the fan 1, the stator core axial ventilation duct 7, the rotor axial ventilation duct, and the hollow shaft ventilat...
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The invention mainly relates to a cooling system of an outer rotor permanent magnet synchronous motor for a crane, and belongs to the technical field of motor manufacturing. The cooling air is composed of four parts: fan, stator core axial air passage, rotor axial air passage, hollow shaft air passage. The stator coil, stator core and permanent magnet are directly air-cooled by the fan, and the heat transferred from the stator to the permanent magnet is reduced. The air with the internal heat of the motor dissipates the heat to the outside of the motor through the hollow shaft air duct, and then the air returns to the motor. The fan can ensure the smooth circulation of the air, fully dissipate the heat of the motor, has a good air cooling effect, and ensures the continuous and safe operation of the motor.
Description
technical field [0001] The invention belongs to the technical field of motor manufacturing, and mainly relates to a motor cooling system, in particular to a cooling system of an outer rotor permanent magnet synchronous motor for a crane. Background technique [0002] Permanent magnet synchronous motor has the advantages of small size, light weight, simple structure, high efficiency, and can realize direct drive control. . The temperature rise of the motor affects the service life and safe operation of the motor. Therefore, an effective cooling system must be established to take away the heat of the motor. [0003] Permanent magnet synchronous motors for cranes need frequent starting and braking during operation, and the load changes greatly, which leads to the prominent problem of local temperature rise of permanent magnet synchronous motors for cranes. When the motor temperature reaches or exceeds the stable operating temperature, it is easy to cause insulation aging and...
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Login to View More IPC IPC(8): H02K21/22H02K1/20H02K1/32H02K9/12
Inventor 马鑫李生祥韩雪岩
Owner 中正屹安科技有限公司