![]() ![]() USMs can also be operated in extreme temperature conditions which makes them first choice to use in aerospace application for e.g., space mission. In addition, USMs have zero electromagnetic interference which is one of the prominent applications in magnetic resonance imaging (MRI). Furthermore, they have capability of self-locking, high holding torque, precision motion control which can be utilized for application areas requiring high degree of precise motion for, e.g., medical operations & manufacturing or inspection of intricate products. Most important that USMs quickly response commends in less than a few microseconds due to the advantages of piezoelectric materials and small inertia of rotors. They are capable to drive the payloads directly without connecting to gear or gear train mechanism for some special applications. USMs can obtain high torque/weight ratio (torque density) in comparison with traditional electromagnetic motors because they are compact in structure & flexible in design. Thus, the frictional contact force between the stator & rotor or slider leads to the mechanical movement & torque. In USMs, the piezoelectric structure is first vibrated in ultrasonic frequency band (>20 kHz), which in turn vibrates the stator when a driving voltage is applied in matched frequency. Similar to traditional electromagnetic motors this kind of motors comprises of stator & rotor, however, the difference is that a USM consists of piezoelectric structure, which is bonded to stator instead of coil and magnet pairs to make simpler and compact in size. e., vibrations occur when an electrical field is applied to some piezoelectric structures. It works on the principle of converse piezo electric effect i. Īlthough the first concept of USMs was invented in 1948, when just after the World War II, USMs have been used for practical applications in 1980s. To make bridge for this gap, many scientists developed specialized motors, such as electrostatic motors, USMs, bionic motors, photo-thermal motors, shape memory alloy motors, microwave motors, etc. These new products have raised new demands on modern motors like micro scale, light weight, high torque, no electromagnetic interference, low noise etc., which cannot be met by traditional motors. Recent advanced sciences & technologies developments on complex & tech-savvy products like satellites, mobile phones, camera lens, spaceships, automotive, robotics, biomedical instruments, manufacturing, etc., makes our life more convenient. Piezoelectric ultrasonic motors have been used in various technological fields from past decade in the gadgets, which we are using in our daily life i.e., a mobile phone to most advanced applications in aerospace. On the other hands, the rapid developments on piezoelectric ultrasonic motors (USMs) may fill the technical gap. One challenge is the miniaturization of motors, wherein the efficiency of commonly used electromagnetic coil-based motors is dramatically reduced when their size less than centimeters scales. Increasing functionalities and weights/sizes reductions are critical issues for future aircrafts, space exploration vehicles, space instrumentations and industrial application etc. This article delivers the novel working principle, illustrates examples for effective utilization of USMs, so that it can buttress the growth of Industry 4.0 Era & on the other hand it also analyses the key Industry 4.0 enabling technologies to improve the performance of the USMs. The studies of the role of USMs in Industry 4.0 scenario has never been done till now & this article fills that gap by analyzing the piezoelectric ultrasonic motors in depth & breadth in the background of Industry 4.0. Industry 4.0 utilizes various advanced tools for carrying out the nexus between the entities & bringing up them on digital platform. Recently many researchers have started focusing on Industry 4.0 or Fourth Industrial revolution phase of the industry which mostly emphasis on digitization & interconnection of the entities throughout the life cycle of the product in an industrial network to get the best possible output. Despite having many advantages, they have several challenges too. USMs have been studied several decades for their advantages over traditional electromagnetic motors. Piezoelectric Ultrasonic motors (USM) are based on the principle of converse piezoelectric effect i.e., vibrations occur when an electrical field is applied to piezoelectric materials. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |