home Electronic Talking about the working principle of the vibration motor in the mobile phone

Talking about the working principle of the vibration motor in the mobile phone

The mobile phone vibration motor is a permanent magnet DC motor, which is used to realize the vibration function of the mobile phone. When a text message or a call is received, the motor starts and drives the eccentric wheel to rotate at a high speed, thereby generating vibration.

The mobile phone vibration motor is a permanent magnet DC motor, which is used to realize the vibration function of the mobile phone. When a text message or a call is received, the motor starts and drives the eccentric wheel to rotate at a high speed, thereby generating vibration.

Talking about the working principle of the vibration motor in the mobile phone

Mobile phone vibration motors are divided into cylindrical (hollow cup) vibration motors and flat button type vibration motors. The technical content of mobile phone vibration motors is not high, especially cylindrical hollow-cup motors, which can be manufactured by many domestic companies, while the flat type has a relatively high technical content, and most of them are manufactured by foreign companies.

The miniature vibration motor used in mobile phones is a DC brushed motor. There is an eccentric wheel on the motor shaft. When the motor rotates, the center mass point of the eccentric wheel is not on the center of the motor, which makes the motor constantly out of balance. The action of inertia causes vibration.

Talking about the working principle of the vibration motor in the mobile phone

The picture above is the ERM vibration motor used in traditional mobile phones. There is an off-center rotor on it. After it rotates, it can produce a full range of extreme vibration experience; apply a positive voltage to the motor to rotate, and apply a negative voltage to the motor to brake . This type of actuator is characterized by lower cost and a long history.

The general structure of the motor is a shaft with a “Rotor” in the middle that can rotate, and a “Stator” (Stator) around it. The magnetic field can be generated after the coil is energized.

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