定子永磁型双凸极非稀土永磁电机(NRE-DSPM)采用剩磁较高的铝镍钴(Al Ni Co)永磁代替传统的稀土永磁,降低电机制作成本的同时也可配合磁化绕组对电机气隙磁场进行调节,使电机获得较好的性能。但受电机本体参数影响,NRE-DSPM在运行时相...定子永磁型双凸极非稀土永磁电机(NRE-DSPM)采用剩磁较高的铝镍钴(Al Ni Co)永磁代替传统的稀土永磁,降低电机制作成本的同时也可配合磁化绕组对电机气隙磁场进行调节,使电机获得较好的性能。但受电机本体参数影响,NRE-DSPM在运行时相电流中含有大量的谐波,严重影响电机的效率和稳定性。为解决此问题,采用了一种PI控制器并联谐振调节器的电流环控制方法。该方法结构简单,易于实现,且无需增加硬件成本,可对电流谐波进行有效抑制。一台1.25 k W的NRE-DSPM样机在试验平台上进行了试验,试验结果验证了所用方法的有效性。展开更多
By simplifying saturatedly magnetized wire-rope to magnetic dipoles of the same magnetic field strength, an equivalent magnetic dipoles model is developed and the measuring principle for recognising damage of broken w...By simplifying saturatedly magnetized wire-rope to magnetic dipoles of the same magnetic field strength, an equivalent magnetic dipoles model is developed and the measuring principle for recognising damage of broken wire was presented. The relevant calculation formulas were also deduced. A composite solution method about nonlinear optimization was given. An example was given to illustrate the use of the equivalent magnetic dipoles method for quantitative damage recognition, and demonstrates that the result of this method is consistent with the real situation, so the method is valid and practical. wire-rope, damage of broken wires, quantitative recognition, equivalent magnetic dipoles, simulate展开更多
文摘定子永磁型双凸极非稀土永磁电机(NRE-DSPM)采用剩磁较高的铝镍钴(Al Ni Co)永磁代替传统的稀土永磁,降低电机制作成本的同时也可配合磁化绕组对电机气隙磁场进行调节,使电机获得较好的性能。但受电机本体参数影响,NRE-DSPM在运行时相电流中含有大量的谐波,严重影响电机的效率和稳定性。为解决此问题,采用了一种PI控制器并联谐振调节器的电流环控制方法。该方法结构简单,易于实现,且无需增加硬件成本,可对电流谐波进行有效抑制。一台1.25 k W的NRE-DSPM样机在试验平台上进行了试验,试验结果验证了所用方法的有效性。
基金Supported by the National Natural Science Foundation of China(50475166) and Natural Science Foundation of Shandong Province (Y2002F09) and Qingdao Scientific Bureau(04-3NS-10)
文摘By simplifying saturatedly magnetized wire-rope to magnetic dipoles of the same magnetic field strength, an equivalent magnetic dipoles model is developed and the measuring principle for recognising damage of broken wire was presented. The relevant calculation formulas were also deduced. A composite solution method about nonlinear optimization was given. An example was given to illustrate the use of the equivalent magnetic dipoles method for quantitative damage recognition, and demonstrates that the result of this method is consistent with the real situation, so the method is valid and practical. wire-rope, damage of broken wires, quantitative recognition, equivalent magnetic dipoles, simulate
