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Eccentric Rotating Mass Vibration Motors Applications
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How does the ERM vibration motor compare to LRA?
| Difference | ERMs | LRA |
|---|---|---|
| Mechanism | As the motor rotates, the eccentric mass generates centrifugal force, creating vibrations | When an AC voltage is applied to the coil, it creates an electromagnetic force that oscillates the mass back and forth on the spring, generating vibrations. |
| Control | Easier | Sophisticated drive circuits to control the AC voltage and achieve optimal resonance. |
| Vibration Frequency | Wide range of vibration frequencies | Narrow frequency range |
| Vibration Amplitude | Higher vibration amplitudes | Precise and controlled vibrations |
| Vibration Direction | Rotational or circular vibrations | Vibration along a single axis |
Ultimately, the choice between ERM(cylindrical vibration motor) and LRA vibration motors depends on the specific application requirements. ERMs are suitable for applications where higher vibration amplitude and a wide frequency range are needed, while LRAs are ideal for applications that demand low power consumption, precise control, and reduced noise levels.
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