稳定界限 meaning in English

margin of stability

The dissertation gives a profound and extensive theoretic research of starting process , causes of fall - out and damages caused by fall - out as well as the electromagnetic process in large pumping station . the ? qual area criterion ? is used in this research to analyze the stability limitation of the synchromotors fall - out in detail . in the end , the study also puts forward a couple of practical methods to prevent synchromotors from fall - out and corresponding solutions to the fall - out
本文主要内容是：围绕大泵站同步电机起动过程、运行中的失步机理及危害、失步时电磁物理过程等方面进行了细致深入的理论研究；用“等面积定则”分析大泵站同步电机失步的稳定界限并提出求解方法；提出预防同步电机失步的措施。