With the social and economic development, urban construction scale is expanding constantly, the increase of population and improvement of people's living standards put forward more and more requirements of urban water supply quantity, quality and stability. Combined with the reality of water supply, this paper designed a set of ADSP2101DSP chip produced by ADI inverter control, VVVF constant pressure water supply system of automatic control hardware circuit is implemented. The hardware circuit of the system is mainly composed of DSP, inverter, motor pump group, pressure sensor etc.%随着社会经济的发展，城市建设规模不断扩大，人口的增多以及人们生活水平的不断提高，对城市供水的数量、质量、稳定性提出了越来越高的要求。本文结合现实供水情况，设计了一套利用TI公司生产的TMS320C5402DSP芯片控制变频器，实现变频调速恒压自动控制供水系统硬件电路。该系统硬件电路主要有DSP、变频器、水泵电机组、压力传感器等组成。
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