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Study on High-speed Operation Characteristics of Induction Motor-spindle Based on Vector Control

Author: ZhangHeng
Tutor: YouLinRu
School: South China University of Technology
Course: Pattern Recognition and Intelligent Systems
Keywords: Asynchronous motor spindle Vector control SVPWM Weak magnetic control TMS320F2812
CLC: TM343
Type: Master's thesis
Year: 2011
Downloads: 198
Quote: 1
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Abstract


Asynchronous motor spindle is the core part of high-speed machining tool . Along with the development of motor control technology, Make asynchronous motor spindle drive systems become hotspot. Because of nc machine tools require motorized spindle system can high-speed operation, and in low-speed can output steady heavy torque, motorized spindle vector control system must be controlled in weakened magnetic field.This paper firstly introduces the research situation and development trend of motorized spindle drive system of the domestic and foreign,moreover summarizes and concludes asynchronous motor speed control strategy, then presents the asynchronous motor vector control principle based on rotor field-oriented, then mainly introduces voltage space vector pulse width modulation (SVPWM) technology principle. The asynchronous motor speed control process is analyzed firstly. Then it introduces the several major weak magnetic control method currently.Combining this topic electric spindle system’s characteristics, voltage closed-loop weak magnetic control method based on load torque is proposed.And the parameter of weak magnetic controller is selected combining asynchronous motor loss model, achieving the highest efficiency and minimal loss when motor runs.Hardware and software platform of the system are introduced in this paper. Hardware platform is inttroduced respectively with mainly loop and control circuit. And then the design of sofeware in the software on TI company TMS320F2812 platforms is introduced. The design of main program, timer 1 interrupt and fault protection program flowchart is Mainly introduced.At last,we debug electric spindle system on the hardware and software system built. In the end, system debugging waveform is analyzed, and the conclusion of motor running more energy-efficient along with dynamic and static performance is better when controlled with weaken magnetic method of voltage closed-loop control based on load torque. Verify the proposed weaken magnetic method is accurate and effective.

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CLC: > Industrial Technology > Electrotechnical > Motor > AC motor > Induction motor
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