KOLT
Jinlong Machinery & Electronics

image of LRA linear resonant actuator for haptics

Linear Vibration Motors (LRA's)

image of LRA linear vibration motor for haptic feedback

 

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. 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.

 

Part Number

& Data Sheet
Download

Config. Type Motor Size Voltage Current Res. Freq
(hz)
Vibe Force (G)
L
(mm)
W
(mm)
H
(mm)
Rated (VAC RMS) Operating
(VAC RMS)
Rated
(ma) MAX
Typical* (ma) Avg.

LV061228B-L65-A

1 6.0 12.0 2.8 2.0 1.7 ~ 2.1 135 111

200

0.65

LVM061530B

1 6.0 15.0 3.0 2.0 1.9 ~ 2.1 200 137

200

0.8

LVM061930B

1 6.0 19.0 3.0 2.0 1.7 ~ 2.35 135 101

180

0.9

G0832008

3 8.0 - 3.2 1.8 0.1 ~ 1.8 80 58

235

1.4

G0825001

2 8.0 - 2.5 1.8 0.1 ~ 1.8 80 68

240

1.2

G0832006

3 8.0 - 3.2 1.8 0.1 ~ 1.8 80 58

235

1.4

G0832012

2 8.0 - 3.2 1.8 0.1 ~ 1.8 80 58

235

1.4

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

NOTES:

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