PiezoWave Linear 0.1N - PiezoMotor - #1

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PiezoWave® Linear 0.1N

• Small size

• High speed

• Very simple drive electronics

• Low power consumption

• Robust design

PiezoWave is not only the smallest motor from PiezoMotor

but also one of the smallest motors in the world. PiezoWave

offers direct linear drive with variable speed in a very small

package, ideal for precision applications where miniature size

and low weight is important, such as portable devices. The

design makes the motor very robust and insensitive to different

environmental conditions as well as resistant to shock and

vibrations. The motor has very low power consumption and

operates on low voltage. The motor does not draw any power

in hold position which further enhances battery life in many

applications.

Integration

The PiezoWave motor comes as a complete motor ready to use

and is easily implemented in many demanding applications.

Two standard mechanical connectors are available - hook end

and eye end.

Even though the PiezoWave motor performs a linear

movement, the technology can easily be tailored to create

a rotating motion. By simply replacing the drive rod with a

rotating disc the advantages of the PiezoWave technology

can be utilized for rotating dynamics. This is one example of

how the mechanics around the PiezoWave elements can be

modified to meet customer needs.

Electronics

The drive electronics to run the motor can be kept very simple.

You need two phases A and B in addition to ground for driving

the motor. The most straightforward way of driving the motor

is to send a pulse train via an inductor to the piezo element

phase electrodes. Since the piezo elements are capacitive this

creates an LC circuit with a sinusoidal voltage across the piezo

element. The direction of motion is determined by altering the

phase shift between the phase signals A and B.

Compared with conventional electromagnetic motors, the

PiezoWave motor has the great advantage of not consuming

energy while holding position. The PiezoWave motor

only consumes energy while moving. The overall energy

consumption is kept low by using resonant drive electronics.

To get you started PiezoMotor provides one handheld driver as

well as a small resonant driver board. These are also suitable

for prototyping.

In some cases it is more suitable for the customer to integrate

the core of the motor even closer into the design. The

PiezoMotor design team can help with customer specific

adaptations of the PiezoWave technology.