变频调速系统的研究

本文略述装置的型式、运行和特性．研究逆变器的触发脉冲、变频以及调速控制系统的最佳 化．频率范围为８～５０Ｈｚ，用定子端电压变化来维持电压与频率之比为常数，具有反馈控制的调 速系统．当速度给定信号突加情况下，可显示出系统很快变成稳定．静止的变频装置具有过载、 过流、欠压、过压和换流失败等保护．

STUDY ON SPEED CONTROL SYSTEMS OF VARIABLB FREQUENCY

The article outlines several types of drive and their respective operation and characteristic. The inverter trigering pulse, the variable frequency and the speed control system optimization are also studied here. With frequencies in the range of 8-50 Hz. the stator terminal voltage varies correspondingly so as to maintain a constant volt/hertz.It shows that the speed control sys- tem with feedback control is apt to become stable when the speed reference signal is being stepped up. The static variable frequency drive, being protec- ted against overload, overcurrent, under-and over-voltage, and commutation faults, will enable the manufacturer to offer a new kind of much smaller, more reliable and less expensive equipment to the industry.