从变频技术的几种控制方式谈调速系统变频器的选择（The selection of speed control system converter is discussed from several control modes of frequency conversion technology）.docVIP

从变频技术的几种控制方式谈调速系统变频器的选择（The selection of speed control system converter is discussed from several control modes of frequency conversion technology） 1 the introduction With advances in computer technology, the rapid development of modern power electronic technology and modern control theory, for the long-term development of the converter is not only used for general performance and energy saving speed regulation control, and has been used in high performance, high speed, large capacity control of motor speed control, frequency converter generally is metallurgy, machinery, steel, textile, paper and other enterprises to choose. How to choose the best frequency converter in different fields has become the top topic in industrial application. Development overview and process of frequency converter (1) development overview Ac transmission and control technology is one of the most rapidly developing technologies. This is closely related to the rapid development of power electronics device manufacturing technology, variable flow technology, control technology, microcomputer and large-scale integrated circuit. Frequency conversion technology is needed to communicate the need of stepless speed regulation of motor. Thyristor (SCR) appeared in the 1950 s and 60 s, the door may be shut off thyristor (decision), appeared in the 70 s, high power thyristor (GTR) and metal oxide field-effect tube (MOSFET), have emerged in the 80 s insulation type two-stage thyristor (IGBT) and the integrated gate converter thyristor (IGCT), intelligent power module (IPM) appeared in the 90 s. The update of the device has led to the continuous development of the power converter technology. As long as the power electronic devices have a new leap, the frequency converter must have a new leap, and there must be a new frequency converter. (2) development process Since the advent of general inverter in the early 1980 s, general inverter upgrading the five times: the first generation is the simulation of