【摘要】 介绍了一种以VB6.0为开发工具,采用DLL技术实现的变频调速供水系统,通过计算机控制变频器进而控制三相异步电机驱动机械装置实现供水系统的自动控制与仿真。本文详细阐述了该系统的构成、工作原理、控制算法、手自动切换方式及数字滤波技术等。系统经运行测试,各项功能、指标均满足实验要求。更多还原

【Abstract】 The paper introduces a kind of realization of frequency control about water supply system on the basis of VB and DLL, with computer controlling frequency converter and with frequency converter controlling three-phase asynchronous motor, which drives mechanism, automatic control and emulation of constant pressure water supply subsystem are achieved. The paper describes the system structure, working principle, control algorithm, manual/auto switch mode and digital filtering technique in detail. The system is launched into application and all performances suit to the demands.更多还原