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Research on Electromagnetic Design and Detent Force of Permanent Magnet Linear Motor

Author: DuWeiMin
Tutor: WangXuDong
School: Henan Polytechnic University
Course: Motor and electrical
Keywords: Permanent magnet linear motor Electromagnetic Design Optimization of magnetic resistance Polar trough with the
CLC: TM359.4
Type: Master's thesis
Year: 2009
Downloads: 165
Quote: 1
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Abstract


Permanent magnet linear motor is widely used in the field of chip assembly line , precision machine tools , the use of direct drive thrust density , fast response, compared with traditional rotary motor screw drive positioning accuracy significantly improved. But the primary core of the permanent magnet linear motor slotted at both ends of breaking , exist magnetic resistance caused by cogging and the end effect , lead to thrust fluctuations , the impact of further improvement of the motor control accuracy . Therefore to suppress magnetic resistance is to improve the focus and difficulty of the design and application of the permanent magnet linear motor . For high precision permanent magnet linear servo motor , the no-load characteristic curve and circuit parameters were calculated based on the magnetic circuit method , loss and efficiency calculations and draw its performance curve . Reasonable assumptions , the establishment of a permanent magnet linear motor four analytical model to calculate the general expression of the regional flux density , and analytic solutions with finite element analysis results were compared . In-depth analysis of the permanent magnet linear motor magnetic resistance mechanism , based on the energy method derived analytical expression of the magnetic resistance . Establish the finite element analysis model of the permanent magnet linear motor magnetic resistance , research and analysis oblique pole shift pole optimization of pole arc coefficient change by edge tooth shape suppress magnetic resistance and measures the comparative analysis of these methods on the inhibitory effect of the magnetic resistance and the normal thrust of the motor . Integrated application pole slot with the , primary core length optimization side end teeth shape optimization methods , the establishment of the 8 -pole 9 -slot permanent magnet linear motor magnetic resistance optimization model . The optimized normal thrust increased by 13% , magnetic resistance reduced by 37% . According to the optimization results , produced a 8 -pole 9 -slot permanent magnet linear motor experimental prototype and build the test platform . The test results show that , the prototype performance optimization in this paper meet the requirements of industrial applications , with mass production feasibility .

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CLC: > Industrial Technology > Electrotechnical > Motor > A special motor > Linear motor
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