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Large Thrust Linear Motor for Low-duty-cycle Operation  

Bang, Yeong-Bong (서울대학교 기계항공학부)
Lee, Gyeong-Min (서울대학교 기계항공학부 대학원)
Publication Information
Journal of the Korean Society for Precision Engineering / v.19, no.8, 2002 , pp. 161-171 More about this Journal
Abstract
This paper presents a linear motor, which generates large thrust with a low operating rate. In industrial fields there is a need for actuators that work with a low duty cycle but generate large thrusts. An example of such a case is provided by the actuators for ejector mechanisms in electric injection molding machines. The ordinary LSM (linear synchronous motor) is unsuitable for this large-thrust and low-operating-rate usage, because of its large size and high cost. This paper contains experimental results on linear motors that can generate large thrusts for a short time, and which can be cheaply produced. The described linear motor could be contained space of $250mm \times250mm\times 250mm$ and generate a maximum thrust of about 20000 N at a current of 250 A.
Keywords
Linear motor; ); Large thrust; Voice coil motor; Ejector; Injection molding machine;
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