With the development of electronic technology, frequency converter technology maturity, frequency converter quickly adapt to rotating joint the load change, supply maximum efficiency voltage. Frequency conversion governor in the software h…

Ac motor synchronous speed expression a: N = 60 f (1 - s) / p type (1) Type of n - asynchronous motor speed; F - asynchronous motor frequency; S - motor slip; P - motor pole logarithmic. By type (1), it is known that speed n and frequency …