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In addition to this diversity, it has the following advantages compared with conventional motors:
![piezo motor piezo motor](https://www.faulhaber.com/fileadmin/Import/Media/LTC300_D.jpg)
a tiny disk type using an inertia force or a rectangular plate one using a frictional force, etc. The ultrasonic piezoelectric motor comprising piezoelectric actuators and mechanical components can be constructed utilizing various piezoelectric resonant modes and mechanical forces, i.e.
#Piezo motor drivers
The step-up converter and both Piezo drivers have their own shutdown control. The drivers operate in a full-bridge fashion, where the OUTA and OUTB pins are the same polarity as the PWMA and PWMB pins, respectively, and the OUTA ‾ and OUTB ‾ pins are inverted from PWMA and PWMB, respectively.
![piezo motor piezo motor](https://3l4sbp4ao2771ln0f54chhvm-wpengine.netdna-ssl.com/wp-content/uploads/2015/05/MICROMO-piezo-motor-cutaway-e1432665682902-1024x737.jpg)
The high output voltage of the step-up converter, adjustable up to 40V, is available for the drivers at the V OUT pin. A step-up converter is used to generate 30V from a low voltage power source such as a Li-Ion battery or any input power source within the part’s wide input voltage range of 2.7V to 10V. Figure 116.1 shows a typical LT3572 Piezo motor drive circuit.
#Piezo motor driver
The LT3572 solves these problems by combining a step-up regulator and a dual full-bridge driver in a 4mm × 4mm QFN package. The resulting high component count and large board space are especially problematic in the design of cameras for ever shrinking cell phones. Traditionally, this challenge has been met with the use of separate circuits, including a step-up converter and an oversized generic full-bridge drive IC. They are relatively small, lightweight and efficient, but they also require a complicated driving scheme. Piezoelectric motors are used in digital cameras for autofocus, zooming and optical image stabilization. Because they operate at ultrasonic frequencies, these motors do not produce sound during operation.
![piezo motor piezo motor](https://www.faulhaber.com/fileadmin/Import/Media/LTC300_P.jpg)
Piezoelectric motors usually do not produce magnetic fields and also are not affected by external magnetic fields. Additionally, they are unaffected by electromagnetic fields, which can hamper other motor types. In addition to a very positive size to power ratio, piezoelectric motors have high holding torque maintained at zero input power, and they offer low inertia from their rotors, providing rapid start and stop characteristics. They are generally small and compact for their power output, and provide greater force and torque than their dimensions would seem to indicate. Piezoelectric motors have a number of potential advantages over conventional electromagnetic motors. Large mechanical torque can be achieved by combining several of these rotational units. Rotating piezoelectric motors are commonly used in submicrometer positioning devices. Linear piezoelectric motors typically offer one degree of freedom, such as in linear stages, but they can be combined to provide more complex positioning factors. The consequent movement may either be rotational or linear depending on the design of the structure. The elliptical movements of the stator are converted into the movement of a slider which is pressed into frictional contact with the stator. Piezoelectric motors use a piezoelectric, ceramic element to produce ultrasonic vibrations of an appropriate type in a stator structure. Peng Zhang, in Advanced Industrial Control Technology, 2010 (2) Piezoelectric motors
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