求翻译：异步电动机的保护是个复杂的问题。在实际使用中，应按照电动机的容量、型式、控制方式和配电设备等不同来选择相适应的保护装置及起动设备。本文国内外学者多年来对于异步电机保护和故障诊断的方法的研究成果进行了归纳总结，对于几种典型的方法分别进行了分析说明。这些方法均已经过了相关研究人员的分析验证，证明了对异步电动机的保护和诊断是有效的。是什么意思？

Protection of asynchronous motor is a complex problem. In actual use, should follow the size, type, motor control and power distribution equipment suited to the different selection protection device and starting equipment. Scholars at home and abroad over the years this article for the protection of asynchronous motor fault diagnosis method of research results and the conclusion, respectively for the analysis of several typical description. These methods are analysis of the research staff has verified and proves to the protection of asynchronous motor and diagnosis is valid.