1、 毕 业 设 计 (论文 ) 外 文 文 献 翻 译 专业 电子信息工程 学生姓名 班级 B 电子 082 班 学号 0810702217 指导教师 信息工程学院 目 录 1 Spindle variable speed system design and analysis forCNC lathe experiment System1 2 数控车床实验系统的主轴变频调速系统设计分析 6 1 Spindle variable speed system design and analysis for CNC lathe experiment System ZHENG Yan-qin， TANG
2、Xue-zhe ( School of Mechanical Engineering， Zhejiang University of Technology， Hangzhou 310014， China) Abstract: Mainly for the demand of designing high-accuracy， fast-response CNC lathe spindle variable speed system， a speed control proposal of fitting frequency motor and transducer together was ra
3、ised via analyzing the basic principles and frequency of the variable frequency speed control According to the CNC lathe experimental system operating conditions， the lathe cutting force and spindle motor power were calculated， evidence for choosing spindle adjustable frequency motor of experiment s
4、ystem was provided In the light of the selected motor character， the basic principle of choosing transducer was proposed， then a transducer was selected which matched the frequency motor in the rated capacity and rated current It is a high-performance and general-purpose voltage transducer using vec
5、tor control Finally， briefly the design ideas for CNC lathe experimental platform were described The frequency motor and transducer are reasonable， and its adjustable performance and starting torque can meet the requirements of the experimental system Key words: variable frequency speed control； adj
6、ustable frequency motor； transducer； CNC lathe 0 Introduction With the development of modern industrial technology, frequency conversion and speed regulation technology in mechanical processing has been widely applied. In the CNC lathe spindle rotary precision of experimental system, determines the
7、components the processing precision, frequency speed control of NC machine tool spindle speed, high efficiency, wide range, high precision, the spindle speed is more and more using variable frequency speed regulation. From the spindle speed on the overall system performance indicators, how to select
8、 motor and inverter motor and inverter, achieve the best match, the spindle is the key to design of variable frequency speed regulation system. This study focused on the experimental system of NC lathe spindle frequency control system design. 1 the basic principle of frequency conversion AC inductio
9、n motor speed is: N0 = n ( 1 - s ) = 60F ( 1 - s ) / P ( 1) Type : F - stator power supply frequency, s, slip, P - magnetic pole logarithm. By the formula (1 ) knowledge, change the frequency of the power supply F, motor speed will be adjusted, this is the variable frequency speed regulation. Conver
10、ter with power semiconductor device on-off action, could be the power supply conversion to another frequency stepless speed regulation of motor power, provide the required voltage, frequency, realizes the stepless speed regulation of asynchronous motor. Frequency converter to realize the conversion
11、of the main mode of AC - AC variable frequency and AC - DC - AC frequency converter ( inverter direct torque control and vector control variable frequency ). AC - AC frequency conversion is to change the thyristor control angle of changing size and frequency, AC - AC voltage and frequency adjustment. Use the thyristor conduction performance, this study put the power to
