Topic
Piezoelectric motor
About: Piezoelectric motor is a research topic. Over the lifetime, 3434 publications have been published within this topic receiving 40896 citations.
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27 Jan 1994
TL;DR: The ultrasonic motor, invented in 1980, utilizes the piezoelectric effect in the ultrasonic frequency range to provide the motive force as mentioned in this paper, which has already found applications in camera autofocus mechanisms, medical equipment subject to high magnetic fields, and motorized car accessories.
Abstract: The ultrasonic motor, invented in 1980, utilizes the piezoelectric effect in the ultrasonic frequency range to provide the motive force. (In conventional electric motors the motive force is electromagnetic.) The result is a motor with unusually good low-speed high-torque and power-to-weight characteristics. It has already found applications in camera autofocus mechanisms, medical equipment subject to high magnetic fields, and motorized car accessories. Its applications will increase as designers become more familiar with its unique characteristics. This book is the result of a collaboration between the inventor and an expert in conventional electric motors: the result is an introduction to the general theory presented in a way that links it to conventional motor theory. It will be invaluable both to motor designers and to those who design with and use electric motors as an introduction to this important new invention.
627 citations
TL;DR: Passive piezoelectric damping devices are studied in this paper, which are analogous to mechanical damped vibration aborbers, and they can be used to damp the air.
Abstract: Passive piezoelectric damping devices are studied. These devices, consisting of a piezoelectric element and a resonant shunt, are analogous to mechanical damped vibration ab sorbers. In the past, a...
437 citations
TL;DR: In this paper, a new mechanism of electric power generation in which mechanical impact energy is transformed to electric energy by a piezoelectric transducer was proposed, and the transformation efficiency was analyzed as functions of the electromechanical coupling coefficient, the mechanical loss and the dielectric loss of the vibrator.
Abstract: We propose a new mechanism of electric power generation in which mechanical impact energy is transformed to electric energy by a piezoelectric transducer. To clarify the relationship between the input mechanical impact energy and the output electric energy in this method, we measured the electric output of a piezoelectric vibrator stimulated by an impact with a steel ball. An electrical equivalent model of the phenomenon is proposed to analyze the transformation efficiency as functions of the electromechanical coupling coefficient, the mechanical loss and the dielectric loss of the vibrator.
385 citations
TL;DR: The experimental observation of piezoelectric generation from a single ZnO wire/belt is presented for illustrating a fundamental process of converting mechanical energy into electricity at nanoscale.
Abstract: This paper presents the experimental observation of piezoelectric generation from a single ZnO wire/belt for illustrating a fundamental process of converting mechanical energy into electricity at nanoscale. By deflecting a wire/belt using a conductive atomic force microscope tip in contact mode, the energy is first created by the deflection force and stored by piezoelectric potential, and later converts into piezoelectric energy. The mechanism of the generator is a result of coupled semiconducting and piezoelectric properties of ZnO. A piezoelectric effect is required to create electric potential of ionic charges from elastic deformation; semiconducting property is necessary to separate and maintain the charges and then release the potential via the rectifying behavior of the Schottky barrier at the metal-ZnO interface, which serves as a switch in the entire process. The good conductivity of ZnO is rather unique because it makes the current flow possible. This paper demonstrates a principle for harvesting energy from the environment. The technology has the potential of converting mechanical movement energy (such as body movement, muscle stretching, blood pressure), vibration energy (such as acoustic/ultrasonic wave), and hydraulic energy (such as flow of body fluid, blood flow, contraction of blood vessels) into electric energy that may be sufficient for self-powering nanodevices and nanosystems in applications such as in situ, real-time, and implantable biosensing, biomedical monitoring, and biodetection.
367 citations
TL;DR: In this article, the linearity of a piezoelectric ceramic actuator may be improved if the applied electric charge, rather than the applied voltage, is varied to control the extension.
Abstract: It is shown that the linearity of a piezoelectric ceramic actuator may be greatly improved if the applied electric charge, rather than the applied voltage, is varied to control the extension. Hysteresis is virtually eliminated.
361 citations