Miniature piezo actuators have haptic feedback

Miniaturised versionsof the PowerHap piezo actuators have been announced by TDK. The company has expanded its portfolio of PowerHap piezo actuators with haptic feedback with the miniaturised 2.5G model. It is compact, with dimensions of 9.0 x 9.0 x 1.25mm.

At the maximum operating voltage of 60V, the 2.5G PowerHap piezo actuator achieves an acceleration of 2.5g of a 100g mass. It offers a maximum displacement of 35-micrometre or a large force of up to 4.0N.

The miniature piezo actuator complements the existing 7.0G and 15G PowerHap types. These piezo actuators have dimensions of 12.7 x 12.7 x 1.9mm and 26 x 26 x 2.4mm, respectively. The actuators achieve an acceleration of 7.0 and 15g under a load of 100g. They also generate forces of up to 10N (7.0G type) and 20N (15G type). Both types are designed for a maximum operating voltage of 120V and offer a displacement of up to 65 and 200 micrometre, respectively.

Compared with conventional electromagnetic solutions, such as eccentric rotary motors (ERMs) and linear resonant actuators (LRAs), PowerHap actuators feature the highest acceleration and force, claims TDK, and the lowest insertion height and the fastest response time of up to one milli seconds. They also have low energy consumption of one to eight-mJ, depending on type.

Moreover, PowerHap offers integrated sensor functionality in a single component.

PowerHap actuators are able to excite the entire stimulation range between one and 1000Hz and have no significant frequency or amplitude limitations. They therefore enable customised haptic feedback to key human mechanoreceptors, so that designers can custom develop high-definition haptic feedback profiles that users expect from cutting-edge human machine interfaces (HMIs). Applications for the piezo actuator with haptic feedback can be found, for example, in vehicles, smartphones and tablets, household appliances, ATMs and vending machines, game controllers, industrial equipment and medical devices.


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