Tefc chemical industry - severe duty totally enclosed fan - cooled squirrel cage induction motors - up to and including 500 hp 化学工业.功率达500hp及以下的全封闭扇冷却式重载
Never feel self - pity , the most destructive emotion there is . how awful to be caught up in the terrible squirrel cage of self 切勿自怜，自怜是最具摧毁力的情绪。一个人把自己关在自我的松鼠笼中真是可怕。
Y series motor totally enclosed and fan - cooling three - phase squirrel cage induction motor , that is newly designed in conformity with the relevant requirement of iec standards Y系列电动机符合iec标准，运行性能好，广泛应用于众多对质量及可靠性要求极高的领域。
The distinguished contributions of this paper are listed in details as the following . 1 . the multi - loop mathematical models under the conditions that the squirrel cage asynchronous motor is healthy , faulty with broken rotor bars or with stator winding inter - turn shorts are deduced thoroughly , and improved necessarily 本文的主要研究成果如下： 1 .详细推导了yn接、 y接、 d接笼型异步电动机在正常、转子断条及定子绕组匝间短路故障情况下的多回路数学模型。
Secondly , a series of novel detection schemes are presented creatively . furthermore , this paper proposes the joint detection scheme for rotor bar breaking and stator winding inter - turn short circuit fault in squirrel cage asynchronous motors , for the first time . meanwhile , a parameter identification technique based approach to detect stator / rotor over - heating fault is also presented 在此基础上，提出了异步电动机转子断条与定子绕组匝间短路故障检测新方法；首次提出了笼型异步电动机转子断条与定子绕组匝间短路故障联合检测方法；基于参数辨识技术，提出了异步电动机定转子绕组过热故障检测新方法。
The algorithm is also applied in the broken rotor bars detection in squirrel cage induction machines , which is dependent on detecting the twice slip frequency modulation due to the speed or torque in the stator current , and the rotor bar faults can be detected effectively without some preprocessing 指出可以利用信号的小波脊线来提取频率随时间连续变换的信号的瞬时频率，并将该瞬时频率提取算法成功地应用到异步电动机定子起动电流信号的分析中，有效地提取出了转子断条故障特征。
