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前言电机是工农业生产中广泛应用的原动力机械。据世界各国的统计,电机耗用的电能约占总发电量的70％左右。因此电机的节能问题具有十分重要的意义。电机节能主要有六个途径,一是“电机设备制造节能”,即研制各种高效节能电机。二是“工程设计节能”,即在工程设计及老厂技术改造中,对于电机容量的合理匹配和电机种类的合理选定及配置。三是“广义运行节能”,即在现代化生产
Preface Motor is the driving force of machinery widely used in industrial and agricultural production. According to the statistics of various countries in the world, the electricity consumed by the motor accounts for about 70% of the total generating capacity. Therefore, the issue of energy-saving motor is of great significance. There are six main ways to save energy in motor. One is “energy saving in motor equipment manufacturing”, that is, developing various kinds of energy efficient motors. Second, “engineering design energy saving”, that is, in the engineering design and technological transformation of the old factory, a reasonable match for the motor capacity and reasonable selection of motor types and configuration. Third, “a broad sense of energy conservation”, that is, in the modern production