风机电机的变极调速与变频调速

通过对变流装置用风机电机调速形式的比较，从调速的节能情况、基本原理、调速方式、运用情况等方面对比分析了风机电机的变频调速与变极调速两种调速方法，并结合实际经验提出了两种调速方法各自适用的场合，以期在保证产品质量的同时，简化调速结构，提高通风质量，缩短研制周期，降低研发成本，加快变流器的研制工作。

Pole-changing Control and Frequency-changing Control of Fan Motor

Through the comparison of regulating speed modes used for converter equipments fan motor, it is analyzed and compared between pole-changing control and frequency-changing control from saving energy, regulating mode, utilizing etc. And according to practical experience proposed the occasion that the two methods suitable. It can assure the quality of production, at the same time, it can simplifying regulating structure, improving ventilation quality, shortening lead time, reducing cost and speeding up the con...