High-Power Piezoelectrics and Loss Mechanisms de Kenji Uchino

High-Power Piezoelectrics and Loss Mechanisms

Kenji Uchino

en Limba Engleză Paperback – 26 aug 2024

As one of the pioneers of "Piezoelectric Actuators", I have contributed to the commercialization of various products for over 45 years, including million-selling devices, micro-ultrasonic motors for smart-phone camera modules by Samsung Electromechanics, piezoelectric transformers for backlight inverters by Apple laptops, multilayer PZT actuators for diesel injection valves by Denso Corporation, and piezoelectric energy harvesting modules for Programable Air-Burst Munition by the US Army. During the development period for "piezoelectric actuators and transformers," I found that the bottleneck for device miniaturization was heat generation under a high-power drive condition. Thus, in parallel to the piezo-actuator developments, I have been developing various high-power density piezo-ceramic materials with the loss mechanism clarification. Hence, I considered that it was time to organize a textbook based on the previous studies, including my materials development philosophy to stimulate younger generations to reach to the energy density of up to 100 W/cm³ in the future. Increasing efficiency and saving energy and space (compactness) are one of the important approaches in this 21^st-century "sustainable society."
High-Power Piezoelectrics and Loss Mechanisims introduces the theoretical background of piezoelectrics, electromechanical phenomenology, loss mechanisms, practical materials, device designs, drive and characterization techniques, and typical applications, and looks forward to the future perspectives in this field. This book is NOT an overall review of this area, but it focuses on important and basic ideas under my development philosophy to understand how to design and develop high-power piezoelectric materials and devices.
This textbook is designed for self-learning by the reader aided by the availability of:
• Chapter Essentials – Summary for quick memory recovery
• Check Points – Answers are provided in the Appendix
• Example Problems – To enhance the reader’s understanding with full, detailed solutions
• Chapter Problems – For the final exam or further consideration

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Cuprins

1. Background of High-Power Piezoelectrics. 2. Foundations of Piezoelectrics. 3. Fundamentals of Losses. 4. Piezoelectric Loss Phenomenology. 5. Equivalent Circuits with Piezo Losses. 6. Heat Generation in Piezoelectrics. 7. High-Power Piezoelectric Characterization System. 8. Drive Schemes of Piezoelectric Transducers. 9. Loss Mechanisms in Piezoelectrics. 10. Practical High-Power Piezoelectric Devices. 11. Concluding Remarks and Future Perspectives. Appendix: Answers to "Check Point." Index.

Notă biografică

Kenji Uchino, one of the pioneers in piezoelectric actuators and electro-optic displays, is the Director of International Center for Actuators and Transducers (ICAT) and Professor of Electrical Engineering and Materials Science & Engineering, also currently a Distinguished Honors Faculty at Schreyer Honors College at the Pennsylvania State University. He has been a university professor for 45 years so far, including 18 years in Japanese universities. He has also been a company executive (president or vice president) for 21 years in four companies, most recently the Founder and Senior Vice President of Micromechatronics Inc., a spin-off company from the above ICAT, where he was elaborating to commercialize the ICAT-invented piezo-actuatorsand transducers.