Micro-vibration motors mainly used in mobile phones, they are DC brush motors.
Micro-vibration motors mainly used for mobile phones belong to DC brush motors. There is an eccentric on the motor shaft. When the motor rotates, the center point of the eccentric wheel is not on the center of rotation of the motor, making the motor constantly losing its balance. Vibration due to inertial effects.
Main features and application editing
- Permanent magnet hollow DC motor
- Small size and light weight (cylinder)
- Radial Rotation/Circumferential Rotation (Flat)
- Low noise, low power consumption
- Strong sense of vibration
- Simple structure
- High reliability
- Short response time
Micro-vibration motors are mainly used in mobile phones, toys, and health massagers.
Precautions
1. When the motor works under its nominal rated voltage, it has excellent comprehensive performance. It is recommended that the operating voltage of the mobile phone circuit design be as close as possible to the rated voltage design.
2. The control module that supplies power to the motor should consider its output impedance as small as possible to prevent the output voltage from drastically decreasing when the load is applied, and affect the sense of vibration.
3. When the column motor tests or tests locked-rotor current, the locked-rotor time should not be too long (less than 5 seconds is appropriate), because all the input power at the time of blocking turns into heat energy (P=I2R), too long may result in Coil temperature is high and deformed, affecting performance. .
4. When the motor with mounting bracket is designed to position the card slot, the gap between the phone case and the mobile phone case should not be too large. Otherwise, there may be additional vibration (mechanical noise). The use of rubber sleeve fixing can effectively avoid mechanical noise, but attention should be paid to the case. Positioning groove and rubber sleeve should use interference fit, otherwise it will affect the vibration output of the motor, and the vibration sense will drop.
5, when transferring or using, avoid to approach the strong magnetic area, otherwise it may cause the magnetism of the magnetic steel of the motor to distort and affect the performance.
6. When welding, pay attention to the welding temperature and welding time, it is recommended to use 320 °C 1-2 seconds, too long and the temperature is too high may damage the wire insulation.
7. Take out the motor unit from the packing box or avoid pulling the lead forcefully during the welding process, and do not allow the lead wire to bend at many angles, otherwise it may damage the lead wire.