Research On Some Key Technologies Of Master-slave System For Ring Spinning Frame

Yarn spinning process is the last critical step, yarn yield and quality have an extremely important impact on plant efficiency. The modern spinning, concerned with high-yield,high-quality, energy-saving, low consumption, reduce costs, reduce labor, product innovation and improve product adaptability, constantly develop new craftwork, new equipment and new technologies. Development trend of spinning is the long-lathe drive, because of the way of drive is a single shaft and demanding the shaft’s stiffness, the lathe length of traditional spinning is limited.Adding the linear connection, the adaptability of the site perform worse. Because the spindle is driven by a single motor for ring spinning frame, it has flexible combinations, unlimited spindle numbers, and it can effectively solve above problems of the traditional spinning. Coupled with the advantages of diversification of control methods, it is becoming a new hotspot.Currently, the key economic factor of hindering ring spinning frame becoming market-oriented is the much high cost of the manufacturing. Because of that, it turns to put forward new requirements for existing technology. Therefore, this paper proposes a master-slave system for controlling electric starter. This program can greatly reduce development costs, and make breakthrough in the critical bottleneck of ring spinning frame marketing. To be able to be specifically implemented as soon as possible, this paper researchs on some key technologies of master-slave system for ring spinning frame. The purpose is to draw the feasibility of the program and the specific parameters and algorithms to achieve.In the design of permanent magnet brushless DC motor for driving electric spindle, this paper through the finite element numerical computation and the secondary development of motor CAD system based on Ansoft Maxwell and uses helical and small groove structure, effectively reduces the electromagnetic torque ripple coefficient within the range of 120 degrees of electrical angle.The motor torque ripple coefficint dropped to 2.8 percent from the original 15 percent, and the efficiency upgraded to 91.33 percent from the original 86 percent.Under the study of synchronization feature of non-automatic control motor in group control motors, using the numerical analysis and modeling approach, it focuses on the synchronously operating characteristics for drive single spindle motor based on bus voltage regulator. Give the ralationship between lagging conduction angle as well as efficiency and motor load at different speeds and different load of motor. The results show that when the differences of motor loads change less than 80 percent, they can still ensure good synchronization features, the lagging angleis less than 30 degrees. With the difference of the loads increasing, the overall efficiency of the motor drive system decreased to 23.1 percent from the highest 91.27 percent. It indicates the necessity of classifying drive mode.Finally, this paper studies the networking theory and technology which are needed for the master-slave control system based on the permanent magnet brushless DC motor. Meanwhile, it proposes networking technical control strategy based on the permanent magnet brushless DC motor position sensor. By using numerical simulation technology and establishing simulation system of networking operating characteristics, the analysis results are given. The results verified the feasibility of the program.