Development of Linear Synchronous Motor for High Speed Conveyance with Field Flux Control Function

本研究课题是长崎大学工学部于2001 ~ 2002年实施的“具有磁场控制功能的高速输送用直线同步电动机的开发”。本课题的目的是研制一种新型的直线同步电动机。电机采用半波整流无刷励磁。由于励磁磁通可以通过改变电枢电流来控制，因此在高速范围内弱磁运行是可能的。设计并制造了实验机。12极和2米长的电枢被安置在地面上。电枢绕组为常规三相绕组。悬浮动子有4极磁场绕组与二极管短路。驱动系统的设计和建造。IGBT逆变器随动子位置产生三相电流，其中转矩电流分量和励磁电流分量叠加.实验证实，新的LSM按照指示往复运动。测量了电机的基本性能，如电感分布、电流波形、推力等.采用有限元法对动子结构进行了优化。目标函数是由磁阻力和垂直力（吸引力）引起的推力涟漪。提出了非对称和分两部分的拖曳式布局方案，以最小化这两个目标。

This research project titled "Development of Linear Synchronous Motor for High Speed Conveyance with Field Flux Control Function" has been carried out from 2001 to 2002 in faculty of engineering, Nagasaki University. The aim of this project is to develop a new type linear synchronous motor (LSM). The motor is based on half-wave rectified brushless excitation. As the field flux is controllable by varying armature current, field weakening operation is possible in high speed region.Principal results obtained by this research are as follows ;1. The experimental machine is designed and built. The 12 poles and 2 m long armature is settled on the ground. The armature winding is conventional 3-phase windings. The suspended mover has 4 poles field windings short circuited with a diode.2. Drive system is designed and built. The IGBT inverter produces 3-phase currents with the mover position, in which torque current component and excitation current component are superimposed.3. It is confirmed experimentally that the new LSM reciprocates as instructed. Fundamental performances are measured, for examples inductance distribution, current wave form, thrust.4. Optimization of mover configuration is carried out using FEM. The objective function is thrust ripple caused by detent force and vertical force (attractive force). Tow type configuration, unsymmetrical one and divided into two parts one, are proposed for minimizing both objectives.