摘要
本文介绍一种以闭环控制和预测推算相结合的办法,控制晶闸管无换向器电机逆变超前角,实现其按给定剩裕角调节的系统。提出一种根据系统运行状态修正参数的预测算法。并据此设计了以8031单片机实现的装置。数字仿真结果表明,比通常闭环实现的逆变角控制具有对电流变化响应快等特点。
Presents a microprocessor controlled system that supplies firing pulses of inverter in such a way that the self-tuning control of advancing angle Y is realized so as to keep the remaining angle d constant for inverter-fed synchronous machine drive. This control system contains a prediction block for the advancing angle. The digital simulation of the present control system is also carried out. This system is found to have the advantage over the closed-loop PI control of firing pulses without prediction block.
