What type of spindle motor is the hard disk? What is the working principle and power supply?

Hello: Your hard disk motor is a brushless Hall motor, so I won't talk about its working principle. The most important thing now is safety, that is, it must not be used as an electric fan, which is very dangerous. Because the motor speed of the hard disk is extremely high, the speed of the old hard disk is 5400/ min, now it is 7200/ min, and there is 10000/ min. If the fan blade is installed and rotated, it will fly out like a flying knife under the strong centrifugal force. ! !