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)-全文預(yù)覽
【正文】 istics matching problem。 FX feeding force。 adjustable frequency motor。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。 radial force。 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 axFzp fyFy VnFz ??nFx p through the conversion device of voltage boosting, ensure the motor in 5 Hz rated output torque and the motor for heating and burning. 3 inverter type selection n the CNC lathe spindle speed control experimental system, inverter selection should pay attention to : 1 converter is to realize constant pressure control and constant current control。 the cable, motor on the coupling capacitance exists, also can cause the increase of current, converter capacity should be increased properly。 UM motor voltage, V。 ICN, the rated current of the inverter, A. Frequency converter and asynchronous motor is posed of different speed regulation system, the converter capacity calculation methods are also different. The above applies to single inverter for single motor supply and continuous operation, the three are unified, selection of frequency inverter capacity should meet 3 formula. In the CNC lathe spindle speed control system in the experimental system, frequency converter is selected in accordance with the motor models identified, motor PCN≥ kPMη cos ( kVA) PCN≥ k 3UMIM 10 － 3 ( kVA) ICN≥ kIM( A) 4 rated current of IM for 12 A, rated voltage 380 V, rated at kW, select the converter capacity and rated current should satisfy the type: ???????????????????????????????( 5)??On the dynamic performance requirements of high CNC experiment system, the original use of DC transmission. At present, vector control inverter has been universal, for the requirements of high precision, fast response CNC experiment system, the use of vector control of high performance generalpurpose inverter is a kind of very good plan ( 11 ), and, in small capacity inverter with voltage type frequency converter, the system selects the Mitsubishi 7KCHT series FRA7403. Frequency converter. Its basic parameters: rated current of A, the rated capacity of 9 kVA, allowing maximum motor power is kW, the rated current for 150%, rated output voltage of 3 phase 380 V to 480 V, admissible voltage fluctuation of + 5%, be forced air cooling. This study selected variable frequency motor and inverter configuration is reaso
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