By Chunsheng Zhao

A entire educational on ultrasonic vehicles for working towards engineers, researchers and graduate scholars. "Ultrasonic vehicles: applied sciences and purposes" describes the working mechanism, electromechanical coupling types, optimization layout of structural parameters, trying out equipment, and drive/control recommendations of varied ultrasonic vehicles and their functions. Dr. Chunsheng Zhao is a professor at Nanjing collage of Aeronautics and Astronautics (NUAA) the place he's Director of the Precision riding Laboratory at NUAA. he's a member of the chinese language Academy of technological know-how, and holds fifty four patents in China and released greater than four hundred papers within the box of piezoelectric ultrasonic automobiles.  

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Extra info for Ultrasonic Motors: Technologies and Applications

Sample text

21 .. 200 efficiency electromagnetic motor Fig. 1. 4 1. 4. 1 Introduction 15 Applications and Development Trends of Ultrasonic Motors Applications As mentioned above. ultrasonic motors have some unique advantages. So it promises a broad application prospects in many fields such as micro-robot. automobile, aerospace, precision positioning system, optical instrument, and medical endoscope. Color Fig. 1 lists some successful application examples in the world. Ultrasonic motors show strong vitality and board market potential sincc they are invented.

2. 1 2. 1. 1 Development and Classification of Piezoelectric Materials Historical Development of Piezoelectric Materials In 1880, Pierre Curie and] acques Curie reported a number of crystals such as quartz, topaz, tourmalinc and Rochcllc salt that could display surfacc chargcs when they were mechanically stressed. This phenomenon that materials produce elcctricity in rcsponsc to applicd strcss is defincd as thc dircct piczoelcctric cffcct, of which thc discovcry is thcreforc crcditcd to thc Curic brothcrs.

Ltd. has used traveling wave ultrasonic motor for color copiers and the required operational life of the motor is more than 3 000 hours. Some applications also request longer life. To that end, many researchers are trying to find the new friction materials in order to increase the life of ultrasonic motors. Take the ultrasonic motors of Shinsei Corporation as an example: the biggest improvement for the past 10 years could be the friction materials including the material formula, manufacture, and adhesive bonding techniques.

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