不同线径镀锡铜包铝线最大电阻率的确定

为了给新制定的《镀锡铜包铝线》电子行业标准中具体线径范围内镀锡铜包铝线规定的最大直流电阻率提供理论支持,首先在镀锡铜包铝线规定的线径范围内选取最小的线径,再通过镀锡试验和金相分析测定镀锡层的最大厚度,然后根据铜包铝线的铜层体积比所规定的最大电阻率,采用理论计算的方法确定不同线径镀锡铜包铝线的最大电阻率。

Dynamic Simulation of Novel Small Wind Turbine Generation System with SynRG

This paper describes a small wind turbine generation system with SynRG （synchronous reluctance generator）. SynRGs are robust and inexpensive. In addition, SynRG has no cogging torque. Hence, wind turbine generation system with SynRG can achieve smooth start at low wind velocity. The rotor design of proposed SynRG is multi flux barrier type. With FEA （finite element analysis） software, the characteristics of SynRG are brought out, and the performance of wind turbine generation system with SynRG including copper loss and iron loss is simulated by FEA coupled with the motion equation of the wind turbine generation system under the maximum power point tracking control. In this paper, the constant wind test and the quasi-natural wind test are conducted. In conclusion, the results of these simulations indicate that the wind turbine generation system with SynRG has good performance, especially in starting phenomena.