Jinlong V Style Logo

Rectangular LRA linear resonant actuator for haptics

Linear Vibration Motors (LRA’s)

Rectangular LRA linear resonant actuator for haptics

Due to their fast rise and fall times linear resonant actuators (LRA) vibration motors are an excellent choice for haptic feedback applications.  The Rise and Fall times listed can be greatly improved by using a Haptic Driver IC which will overdrive the LRA upon start up and apply a 180 degree phase shifted wave form to quickly brake the LRA .   Their relatively simple internal construction also offers high reliability and exceptionally long life when compared with brushed ERM motors. Jinlong’s rectangular LRA’s 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.
Scroll Table To See All Content


Part Number

Download PDF
Image

lra motor logo
Motor Size (mm) Voltage (Vac RMS) Current (mA) Response Time
(ms)
- 50% of power
- w/o Haptic Driver
Res. Freq (hz) Vibe Force (G)
L W H Rated Operating Rated
MAX
Typical*
Avg.
Rise
Time
Fall
Time
L181206-120H
L181206-120H LRA Linear Vibration Motor 18.0 12.0 6.0 2.0 0.9 ~ 2.2 230 191 30 30 120 2.00
L91022-160-320H
L91022-160-320H LRA Linear Vibration Motor 22.6 10.0 9.0 1.5 0 ~ 1.65 180 155 50 60 160 / 320 3.00
L91022-170H L91022-170H LRA Linear Vibration Motor 22.6 10.0 9.0 1.5 1.2 ~ 1.8 180 155 50 60 170 2.60
L120628H L120628H LRA Linear Vibration Motor 12.0 6.0 2.8 2.0 1.0 ~ 2.05 130 105 40 60 200 1.80
VLV041235L VLV041235L LRA Linear Vibration Motor 12.0 4.0 3.5 1.8 0.1 ~ 1.85 60 47 40 60 240 1.00
LV101040A
LV101040A LRA Linear Vibration Motor 10.0 10.0 4.0 2.5 0.1 ~ 2.5 350 317 10 40 170 2.75
LV081230B-L30 LV081230B-L30 LRA Linear Vibration Motor 8.0 12.0 3.0 2.0 1.7 ~ 2.1 135 111 40 60 175 0.80

 

NOTES:

  • Custom wire length are available for MOQ: 1K pcs
  • We can add connectors for MOQ: 1K pcs
  • Custom FPC’s are available for MOQ: 6K pcs.
  • Tooling and design fees will apply for custom FPC’s

When compared to standard brushed ERM vibration motors, LRA’s are higher in price and must be used with external driver IC.

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. TI is one such company that makes LRA drivers IC’s. TI makes and evaluation board that incorporates the TI DRV2605L haptic driver IC. See below link for info:

http://www.digikey.com/en/product-highlight/t/texas-instruments/drv2605-haptic-driver

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.

See the video below to see our LVM061530 LRA in action.

LRA VIDEO

Top