According to the requirements of propeller aerocraft model test in wind tunnel , specifications of the driven motor is presented by aerodynamic analysis , and a short - term operated high power density three - phase induction motor is developed with reasonably designing the motor , such as electromagnetism load , heat checkout and high - efficiency heat exchanger 摘要针对螺旋桨飞机模型带动力风洞实验要求，通过气动性能分析提出驱动电机的技术指标，在满足结构约束的条件下，通过合理设计电机的电磁负荷、校核发热、采用高效冷却装置等，研制出短时工作制高功率密度三相异步电机。
It is made up of the melting shaft furnace , titled holding furnace , ( reverberatory refining furnace ) , casting machine , automatic shearer , cast bar straightening and dege shaving machine , rolling mill , engine oil lubrication system , emulsion lubrication system , rod orbital coiler , line electric control , etc 铜杆连铸连轧机生产线主要有融化竖炉，倾动式保温炉， （铜精炼反射炉） ，连铸机，滚剪机，校直刨边机，打毛机，连轧机，润滑油系统，乳化液系统，铜杆还原冷却装置，双筐梅花收杆机和电气控制系统等组成。
4 heating zones on barrel , all with air - cooling . each zone with multiple rows of copper fins for high cooling efficiency , coupled with oversized cooling fans mounted at the rear of the extruder barrel . large wattage on heaters coupled with the efficient cooling system ensures very fast heating and cooling of each zone 机筒上有4个加热区域，都带有空气冷却装置；每个区域含附带大冷却风扇的多排铜叶片可获得高冷却效果，高功率的加热模块同有效的冷却系统相结合可以确保每个区域的快速加热和冷却。
In order to obtain the tolerance requirement for the magnetic field homogeneity of the solenoids in electron cooling device , the source of the magnetic imperfection and its influence on the transverse temperature of electron beam were investigated by means of numerical simulation , and taking the space charge effect of electron beam into account 摘要分析了直螺线管磁场缺陷的来源，考虑了电子束的空间电荷作用，采用数值方法模拟计算了磁场缺陷对电子束横向温度的影响，获得了电子冷却装置中直螺线管磁场的均匀性要求。
The cooling system for engine adopted hydraulic drive and control technology to control the speed of the fan : the chip adjust the control - current of the proportional value , which used in the engine cooling system , to control the speed of the fan . and the size of the control - current is according to the coolant temperature , coolant temperature change rate and target temperature . as for as the hydraulic cooling system we used a motor to drive and control the fan ’ s work or stop according to the temperature of the hydraulic oil 该系统的特点及其实现的功能为:电液混合驱动方式改变了工程机械冷却装置驱动方式单一的缺点,发动机冷却系统采用了电液比例技术控制风扇转速;单片机可以根据冷却液温度、冷却液温度变化率和目标冷却液温度调节液压驱动系统中电液比例阀的控制电流,进而控制液压油的流量,即可以实现冷却风扇转速的连续调节;液压油冷却系统采用了电动机驱动,然后由单片机根据液压油的温度控制电动机的起动和停止。
