(1) optical machine
Ultrasonic motor can be used as a driving element in the focusing system of optical instruments such as cameras, video cameras and microscopes, and can obtain very satisfactory results. Contact ultrasonic motor has the characteristics of low speed and large torque, and can be directly driven without reducer in many applications. Compared with the traditional motor lens, it is quiet and has no electromagnetic noise. High positioning accuracy; Short focusing time; Gearless reduction, simple mechanism, etc.
Optical microscope, auto-focusing, micro-positioning, micro-nano slide rule, LCD and other display panels, wafer detection and positioning, vibration reduction system, astronomical observation instruments, adaptive optical system, micro-scanner, gene processing, microsurgery, optical mirror adjustment and so on have all applied ultrasonic motors.
(2) cars
Ultrasonic motor is used in the driving device of automobile window, which can give full play to its advantages of flat size, low speed and large torque. It can also be used on maglev trains. In order to make the train suspend on the track and make the superconducting current passing through the coils on the track generate a strong magnetic field, a driver with large torque and good control performance is needed, which is most suitable for USM.
(3) Application in space flight
The running characteristics of the engine under low temperature and vacuum conditions are very important to the development of the aerospace industry. Ultrasonic motor has the advantages of simple structure, light weight, no interference from magnetic field and no need of lubricating oil in vacuum, which electromagnetic motor does not have in aerospace field. At the end of 1995, the linear ultrasonic motor was first used in the multi-functional crawling system in the Jet Propulsion Laboratory of NASA. The system is used to detect the outer bulkhead of spacecraft, and the ratio of bearing weight to self-weight is 10: 1. Taking advantage of its low speed, high torque and high precision, NASA applied it to the light manipulator of Mars probe. After replacing the brush DC motor with ultrasonic motor, the structure of Mars arm ⅱ is similar to that of Mars arm ⅰ, but the weight is reduced by 40%, mainly because it can be directly driven by ultrasonic motor, and the working space can be greatly reduced. For example, the filter wheel on NASA's Calileo spacecraft was reduced by four times before and after using the ultrasonic motor. Based on its flexible driving mode, Japan Aerospace Research Institute has developed two kinds of linear ultrasonic motors for the expansion and contraction of space extension structures. Using the fast response of ultrasonic motor, the United States and France use it in missile measurement and control system; Using the characteristics of simple structure and miniaturization, Japan has developed a miniature ultrasonic motor, which is used in micro-satellites and other fields. In addition, countries such as Japan and the United States are conducting various researches on ultrasonic motors, which are used in military fields such as aerospace. It can be seen that ultrasonic motor will be paid more and more attention in military fields such as aerospace because of its advantages of high torque-to-weight ratio, fast response, high precision and power-off self-locking.
(4) Application in industrial machine tools
Ultrasonic motor can be used for tool drive and control devices and fixed-point transmission of workpieces because of its high structural stiffness and high positioning accuracy. Such as the precise feed mechanism of machine tools, the wear scheduling device of tools, the micro-EDM device, the precise positioning and clamping of workpieces, the rapid adjustment of fastening devices and fixtures, etc.
(5) Application in medical and biological fields.
Biomaterial micromanipulator, metering equipment, micro nozzle, impact generator, kidney calculi pulverizer, trachea ultrasonic scanner. Many scientific instruments and medical instruments will produce strong magnetic fields or have strict requirements for electromagnetic field interference, and ultrasonic motors can avoid these problems, so they can be used to drive equipment in nuclear magnetic vibration environment.
(6) Application of civil products
First of all, because of the advantages of silence and small size, ultrasonic motors can be used in compressors and are widely used in the field of household appliances. The traditional motor drive inevitably has error accumulation in the middle link, while the ultrasonic motor has good control performance and small volume, and can be used for precision control, such as electronic watches; At the same time, because of its high control precision, it can be used for the processing and inspection of CNC machine tools such as IC and LSI, printed circuit boards, wafer alignment, welding, packaging, and accurate punching and loading of semiconductor wafers. Ring piezoelectric motor can be used for automatic opening and closing of building curtains. Field of application optical instruments are shown, For example, cameras, video cameras, microscopes, motors for adjusting car seats, headrest, automatic antenna, automatic door lock, car roof, instrument, electronic reflector and other biomedical micromanipulators, measuring equipment, micro nozzles, impact generators, kidney calculi crushing therapy machines, organ ultrasonic scanners, civil product compressors, electronic watches, ic, LSI and so on.