Here’s a Quick Way to Know about the Vibration Motor of DC Motor.

Coin Vibration Motors(with brushes):

A  samll motor of coin vibration motor may be used in applications such as smart watches, fitness trackers and other wearable devices. They are commonly used to provide the user with discrete alerts, alarms or haptic feedback. The“brush” type motors are typically used for consumer grade products where the vibration feature is not the primary feature of the product (moderate duty cycle). The vast majority of products use this type of motor. If however your application requires an exceedingly long motor life time and high MTBF consider using our BLDC Brushless Vibration Motors. These are considerably more expensive than the brush type. We can supply our vibration motor with a variety o connectors, spring contacts, FPC or with bare contact pads. We can also design a custom FPC for your application. If your application requires it, foam pads of varying thicknesses and/or double stick tape tape may also be added. 3D CAD files are available upon request.

 

BLDC – Brushless DC Coin Vibration Motors:

BLDC Brushless  dc motor coin vibration motors are an excellent choice for high reliability applications requiring an exceptionally long life time / MTBF. Applications where the vibration feature used very often or is used in a medical device should consider a BLDC vibrator motor. These BLDC motors typically exceed the life time of brushed type coin motor by over 10 times. They are more costly than brushed types since they incorporate a driver IC. Polarity must be observed when apply power. Other specs are comparable to that of standard brushed type motors.

 

Linear Vibration Motors (LRA's):

We manufacture both rectangular and coin type LRA's.
Due to their fast rise and fall times and superior braking ability, linear resonant actuators (LRA) vibration motors are an excellent choice for haptic feedback applications. Their relatively simple internal construction also offers high reliability and exceptionally long life when compared with brushed ERM motors. Leader’s mini linear vibrating moto have an internal mass that oscillates back and forth along the X-axis at its resonant frequency. Our coin shaped linear resonant actuators oscillate along the Z axis, perpendicular to the motors surface. This Z axis vibration efficiently transmits vibrations in wearable applications. In Hi-Rel applications, they are a viable alternative to brushless vibration motors as the only internal parts that are subjected to wear / failure are the springs.

Configuration Type 1: RECTANGULAR / BAR TYPE LRA with Wire Leads

Configuration Type 2: COIN TYPE LRA with Wire Leads

Configuration Type 3: COIN TYPE LRA with FPC

Unlike conventional brushed DC vibration motors, linear resonant actuators must be driven by an AC signal at the devices resonant frequency. A number of companies make IC drivers for linear vibration motors that supply the correct drive signals and contain a library of haptic effects you can choose from.

It should be noted that unlike brushed ERM vibration motors, varying the amplitude of the applied voltage will only change the amplitude of the vibration force, not the frequency of vibration. Due the LRA’s Hi-Q , applying a frequency above or below the resonant frequency of the LRA will result in the LRA producing a lower vibration amplitude or if far from the resonant frequency, none at all.