【摘要】 无刷双馈变频调速电机的转子结构,目前研究的有磁阻和特殊笼型两种类型。其中特殊笼型转子被认为最有可能应用于大容量电机。但是,这种特殊笼型转子绕组是依据“共轭”原理设计的,导体利用率低,谐波含量大,因而性能还达不到实用要求。为解决这个问题,提出了一种不同于上述两种转子结构的新型转子绕组,即根据“变极法”设计的绕线型转子绕组。这种新型绕组利用其中两种不同极对数p和q对应感应电势在理论上可以有不同电回路的特点,对转子导体进行“重复利用”,从而具有较高的利用率和低的谐波含量。采用这种绕组的双馈电动机可以如同常规电机那样运行, 只是在需要时才进入变频调速 态工作,变频器可采用普通变频器。文中列出了这种新型绕组几种可能的连接方式,并对其工作原理进行了说明,最后,给出了应用这种绕组双馈电机空载下的调速实验结果。更多还原

【Abstract】 The brushless doubly-fed machine has two types of rotor structures, reluctance and cage rotor. The cage rotor is reckoned to be possible to be used in the high capacity machine, but the cage rotor can抰 do this at present because its conductor availability ratio is low and harmonic content is high. A new brushless doubly-fed machine with a new type of rotor structure is presented in this paper. The new machine has a p/qpole wound-rotor changing-pole winding which is repeatedly used in p or q pole-pair numbers, therefore it has higher rotor conductor availability ratio and low harmonic content. The new machine can operate like a traditional machine yet. Some examples of the new rotor windings are given. Analysis and test results show that the new machine has better performance in speed control.更多还原