The other is the linear motor used in Apple mobile phones. Because the direction of the centripetal force changes with the rotation of the cam, so The mobile phone in my hand is shaking. When rotating, the cam moves in a circular motion to generate centrifugal force.
By energizing the coil, the coil and the magnet generate force, and the Air conditioning fan motor Manufacturers middle magnet will move back and forth, causing vibration.What about smartphone vibration? How does it adjust the vibration frequency? Will the phone's vibration frequency be broken for a long time?
A common one is a miniature hollow cup motor with a cam mounted on the head, and the center of gravity of the cam is not on the center of the shaft. The principle and structure are actually not complicated.
Combined with the circuit of the mobile phone, when there is information received and need to be reminded by vibration, the control circuit of the mobile phone will send out a signal, so that an appropriate amount of current will be input to the motor, and the rotation of the motor rotor will drive the cam to rotate, so it produces The vibration. The linear motor is smaller in size, has a better vibration and higher cost