數(shù)控車床外文翻譯---數(shù)控車床實(shí)驗(yàn)系統(tǒng)的主軸變頻調(diào)速系統(tǒng)設(shè)計(jì)分析-數(shù)控設(shè)計(jì)-展示頁(yè)
2025-05-27 01:18本頁(yè)面
【正文】 device onoff 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 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 2 convert AC power to DC power, and then by the use of SCR inverter main circuit, output threephase frequency and voltage can be adjusted, equivalent to a sinusoidal pulse width modulation wave ( SPWM wave ), AC DC AC variable frequency, drag the threephase asynchronous motor speed operation ( 45 ). 2 CNC lathe spindle speed control experiment system of variable frequency motor selection Due to the plexity of cutting process, the cutting force influencing factor is very much, therefore has not yet been derived and easy to calculate cutting force FX, FY, FZ theoretical formula, generally through a large number of experiments, the establishment of the experience formula to calculate cutting force. This study will back cutting depth, feed rate and cutting speed of 3 main factors as variable factors, and other factors, correction coefficient Indirect calculation, it can be FX, FY, FZ 3 ponent ( 6 ) empirical formula: ?????????????????? ( 2) Type : FZ FY cutting force。 adjustable frequency motor。 畢業(yè)設(shè)計(jì) (論文 ) 外文文獻(xiàn)翻譯 專業(yè) 電子信息工程 學(xué) 生 姓 名 班級(jí) B 電子 082 班 學(xué)號(hào) 0810702217 指 導(dǎo) 教 師 信息工程學(xué)院 目 錄 1 Spindle variable speed system design and analysis forCNC lathe experiment System1 2 數(shù) 控 車 床 實(shí) 驗(yàn) 系 統(tǒng) 的 主 軸 變 頻 調(diào) 速 系 統(tǒng) 設(shè) 計(jì) 分析 6 1 Spindle variable speed system design and analysis for CNC lathe experiment System ZHENG Yanqin， TANG Xuezhe ( School of Mechanical Engineering， Zhejiang University of Technology， Hangzhou 310014， China) Abstract: Mainly for the demand of designing highaccuracy， fastresponse CNC lathe spindle variable speed system， a speed control proposal of fitting frequency motor and transducer together was raised 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 system 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 highperformance and generalpurpose voltage transducer using vector 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。 transducer。 radial force。 V cutting speed, V = nd / ( 1000 x 60 )。 D F feed the workpiece diameter. When turning, FZ than FY, FX is much greater, and FY, FX direction movement speed is small, therefore, FY, FX power consumption is very small (only 1% ~ 2% ), it can be ignored. Used in lathe cutting force calculation formula is as follows: FZ = 9． 81CFz the frequency conversion motor and motor frame size as far as possible the same strength。 axFzp VnFz FY = CFy fyFy axFx VnFz ??nFx p V ??nF 3 dimensions and center of Higher Correspondence
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