基于Proteus的模拟三相交流信号源设计

为合成高性能三相低频正弦波信号,以降低研究成本,提出了一种基于集成运放及电阻、电容元件的工频三相交流信号源设计方法。通过正弦波发生器、电压幅值调节电路、移相网络、输出电路及电压—电流转换电路产生的对称三相电压及三相电流分别在0~1 V、0~5 mA之间同步精确可调。在星形连接对称电阻负载时,Proteus对三相交流电压源及电流源的仿真结果表明,电路性能指标达到了设计要求,具有成本低、精度高、性能稳定、输出波形无失真等优点,可应用于自动控制系统及仪表检测系统。

Design of analog three-phase AC signal source based on Proteus

To synthesize three-phase low-frequency sine-wave signal with high performance and reduce the research costs,a design method of power-frequency three-phase AC signal source based on operational amplifiers and resistors and capacitors was proposed.Composed of the circuit of sine-wave generator,voltage amplitude regulating,phase-shifting,output and voltage-current converting,the symmetrical three-phase voltage and three-phase current could be synchro-regulated exactly in the range of 0~1 V and 0~5 mA.The simulation results of three-phase AC voltage source and current source with symmetrical resistor load star-connected in Proteus show that the performance indicators of the circuit meet the design requirements,the circuit has the advantages of low cost,high accuracy,stable performance,without distortion of the output wave,and can be applied to automatic control system and instrument test system.