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The Application Research of Vector Inverter in High Speed Milling Machine

Author: LiZuGuang
Tutor: WangXinSheng
School: Harbin Institute of Technology
Course: Control Science and Engineering
Keywords: Vector inverter High-speed milling Direct Torque Control Harmonic Multi- speed
CLC: TM921.51
Type: Master's thesis
Year: 2011
Downloads: 48
Quote: 0
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Abstract


With advances in technology , modern machinery manufacturing industry , the quality of the various parts of the increasingly high demand , high-speed milling machine is able to complete a variety of processing tasks machine , its performance improvement is to promote the development of the manufacturing industry plays a role , using vector inverter-driven high-speed milling spindle to ensure high-speed milling machine stable high-speed machining , and improve work efficiency , reduce production costs . Vector frequency control algorithm and output voltage harmonic distribution and design of a the MFC710 inverter-driven high - speed electric spindle external control circuit . The topic introduces the development status of the inverter in the milling , the superiority of the high-speed electro-spindle high-speed milling , establish the mathematical model of the high-speed electric spindle , bipolar SPWM voltage space vector pulse width modulation technique MFC710 inverter using constant voltage to frequency ratio (U / f) than the the scalar control strategies and voltage space vector direct Torque (DTC-SVPWM) control strategy simulation , and analysis of simulation results of the two control strategies drawn to select vector control strategy inverter drive electric the spindle motion system outperforms scalar drive system control strategy . Included in the output voltage of the inverter harmonics, these harmonics will produce asynchronous torque and high - speed electric spindle synchronization torque impact , reducing the efficiency of electric spindle , inverter control strategy simulation analysis the harmonic analysis of the output voltage of the inverter , the inverter output voltage harmonic distribution , given the to optimize depth ways to improve the voltage output of the inverter switching frequency and modulation , and adaptive notch filter to eliminate specified a harmonic , to minimize the adverse effects of harmonics on the stable operation of the high - speed electric spindle . Hardware structure of Tuowei Da the MFC710 vector inverter method to select a multi-speed operation mode to drive high-speed electric spindle , spindle speed output of high-speed milling machine is more accurate , and designed to drive local and remote external control circuit , the circuit using optocoupler and relay the dual protection protection circuit isolation MFC710 inverter - driven motor spindles multi-speed operation , the spindle speed to achieve a stable , accurate running target .

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CLC: > Industrial Technology > Electrotechnical > Electrification,electrical energy application > Electric drive ( electric drive ) > Control system > Variable frequency control system
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