Ko, Hyun-Phill Lee, Kyong-Jae Yoo, Kyoung-Ho Kang, Chong-Yun Kim, Sangsig Yoon, Seok-Jin 2024-01-21T03:05:27Z 2024-01-21T03:05:27Z 2021-09-01 2006-05 0021-4922 https://pubs.kist.re.kr/handle/201004/135561 A modified structure for tiny ultrasonic linear motors has been developed, and various shaft materials have been tested in order to improve dynamic properties. The shaft material has a direct influence on efficiency, reliability, and quality of the motors and their dynamic properties. The shaft material is crucial to achieve high performance. Shafts of with various materials, such as a stainless steel, stainless steel coated with diamond like carbon (DLC), a Pyrex, and a graphite, can make it possible to improve dynamic properties of the motors over a wide range of tribological conditions. For the motor with a stainless steel shaft coated with DLC at 47 kHz, its velocity is 6.5 mm/s and its force is 110 mN. When the motor has a Pyrex shaft, a force of 140 mN is reached at 52 kHz. Accordingly, the maximum force produced by a motor with a graphite shaft is estimated as 97 mN. The velocity of this motor was 15 mm/s. We found that graphite has a fine surface and a directional texture which can help a moving element achieve linear motion. Finally, the use of a cap resulted in significantly improving stable operation. A motor with a graphite or a Pyrex shaft showed very stable operation and improved dynamic characteristics. English JAPAN SOC APPLIED PHYSICS Analysis of tiny piezoelectric ultrasonic linear motor Article 10.1143/JJAP.45.4782 1 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, v.45, no.5B, pp.4782 - 4786 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS 45 5B 4782 4786 scie scopus 000238156600105 2-s2.0-33744470633 Physics, Applied Physics Article; Proceedings Paper piezoelectric motor radial mode linear motor velocity actuating force