Cooling method for permanent magnets Synchronous electric spindleFor the overall cooling of the electric spindle, there are generally two methods: liquid cooling and forced air cooling. Liquid cooling refers to the internal planning of cooling water circulation in the electric spindle and the installation of corresponding cooling machines externally.

In this way, the cooling liquid can circulate inside the permanent magnet synchronous spindle to remove internal heat. The advantages of this cooling method are simple and reliable planning, and the cooling effect is significant. The disadvantage is that the cooling effect on the spindle core is relatively poor, and the cost of the cooling machine is relatively high.
 
And air forced cooling refers to planning a forced convection channel between the housing of the electric spindle and the stator of the motor. The heat generated by the motor enters the forced convection zone through heat conduction, and finally brings the heat into the air, achieving constant temperature operation of the electric spindle.
 
Compared to other methods, the air forced cooling of permanent magnet synchronous electric spindles has the characteristic of being pollution-free. If static pressure gas bearings are used, the gas from the static pressure gas bearings can circulate inside the spindle to take away some of the heat from the motor.
 
Overall, it is necessary to cool and dissipate heat from permanent magnet synchronous electric spindles, especially in high-temperature climates.