Design And Research On Variable Frequency Speed Control Of Motorized Spindle Based On Ultrasonic Levitation

Topics covered in this article is ultrasonics, mechanical vibration and electrical study of a combination of research, is the application of ultrasonic technology in the field of mechanical and electrical extension and development. Modern ultrasound technology has been quite in-depth research, which has the mechanical properties of ultrasound and mechanical effects have gradually been recognized, the theory is gradually taking shape and perfect; piezoelectricity and piezoelectric materials, the development of the ultrasonic wave generation and conversion to easier to achieve, which are oriented research projects provides a good basis of theory and technology. The research projects address the construction of ultrasonic vibration in high-speed ultrasonic motor suspension bearing the relevant theory and key technology to further expand the application field of ultrasonic technology, so as to develop a more practical basis of new high-speed motor.In this paper, the National Natural Science Foundation of "high-speed ultrasonic motor suspension bearings," to ultrasonic suspension radial and axial two-way spindle frequency control support as the research object, the knowledge referred to in this paper a multi-discipline integrated, research has a good innovative and to further study after laying a good foundation, the paper includes the following four main areas1,Research and applications in high-speed spindleThis paper describes the structure of various high-speed spindle features and functions of theory, analysis and comparison of the ordinary bearings, ceramic bearings, magnetic bearings, bearings and other advantages and disadvantages of static and dynamic pressure, indicating that the spindle required for cooling and lubrication methods of the control of the spindle and subsequent trends. Research in addition to knowledge of motor learning, introduced the principle of the motor and electrical energy conversion of specific principles of permanent magnet synchronous motor, made a detailed analysis of the startup process.2,Frequency Instrument presented and discussedUltrasonic mentioned in this article high-speed spindle is a suspended power supply and adjust the drive to work under the system introduced DZB100H drive features, functions and parameters of applications, introduced the subject of the failure of the inverter processing and maintenance method. Comprehensive and focused introduction to the general classification of the inverter and its control. Elaborate a common inverter circuit, inverter circuit unit of the functions and principles of the inverter main circuit and working principle. Finally, note the drive troubleshooting and maintenance of the basic method.3,Piezoelectric transducer and the ultrasonic generator designIn the specific objectives and feasibility of the project made a detailed analysis, the analysis of the different types of piezoelectric materials and the physical properties of piezoelectric ceramics later, we developed a different tapered shapes of piezoelectric transducers on the pressure Ceramics of the vibration mode and the equivalent circuit made a comprehensive analysis and discussion, in addition, we analyzed a large number of generator circuit, designed the meet the test requirements of the ultrasonic generator, which can be more clear Understanding of the specific principles of ultrasound suspended support for the future pave the way for all aspects.4,Ultrasonic Frequency Spindle suspended the trial and experimental research prototypeAfter all aspects of preparation and practice, we design and manufacture of ultrasonic suspension radial and axial support of the prototype, and two of the experimental results and the specific data were compared and analyzed, and found the shaft which is the radial support ,the existence of gravity levitation gap leaving uneven, the problem of neutral can not be solved, so we focus on the support of the axial suspension, the current experiment has achieved great results, supported by two-way axial prototype has been processed and the trial out of which the ultrasonic levitation technology laid the foundation for further research. Based on the above discussion and experimental study, obtained in this paper to elaborate on the conclusions.