Multi-physics analysis of permanent magnet tubular linear motors under severe volumetric and thermal constraints  

作　　者：李方 叶佩青 张辉 

机构地区：[1]Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China [2]Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipments and Control(Tsinghua University),Beijing 100084,China [3]State Key Laboratory of Tribology(Tsinghua University),Beijing 100084,China

出　　处：《Journal of Central South University》2016年第7期1690-1699,共10页中南大学学报（英文版）

基　　金：Project(2015BAI03B00)supported by the National Key Technology R&D Program of China;Project(Z141100000514015)supported by Science and Technology Planning Program of Beijing,China;Project(SKLT12A03)supported by Tribology Science Fund of State Key Laboratory of Tribology,China

摘　　要：Permanent magnet tubular linear motors(TLMs) arranged in multiple rows and multiple columns used for a radiotherapy machine were studied. Due to severe volumetric and thermal constraints, the TLMs were at high risk of overheating. To predict the performance of the TLMs accurately, a multi-physics analysis approach was proposed. Specifically, it considered the coupling effects amongst the electromagnetic and the thermal models of the TLMs, as well as the fluid model of the surrounding air. To reduce computation cost, both the electromagnetic and the thermal models were based on lumped-parameter methods. Only a minimum set of numerical computation(computational fluid dynamics, CFD) was performed to model the complex fluid behavior. With the proposed approach, both steady state and transient state temperature distributions, thermal rating and permissible load can be predicted. The validity of this approach is verified through the experiment.Permanent magnet tubular linear motors（TLMs） arranged in multiple rows and multiple columns used for a radiotherapy machine were studied. Due to severe volumetric and thermal constraints, the TLMs were at high risk of overheating. To predict the performance of the TLMs accurately, a multi-physics analysis approach was proposed. Specifically, it considered the coupling effects amongst the electromagnetic and the thermal models of the TLMs, as well as the fluid model of the surrounding air. To reduce computation cost, both the electromagnetic and the thermal models were based on lumped-parameter methods. Only a minimum set of numerical computation（computational fluid dynamics, CFD） was performed to model the complex fluid behavior. With the proposed approach, both steady state and transient state temperature distributions, thermal rating and permissible load can be predicted. The validity of this approach is verified through the experiment.

关 键 词：tubular linear motor MULTI-PHYSICS COUPLING lumped-parameter temperature prediction 

分 类 号：TM359.4[电气工程—电机]