电路仿真设计软件Multisim在三相交流电路中的应用

Application of circuit simulation software of multisim in three-phase AC circuit

单相负载三相均衡供电电路的设计实验,是在模拟某工厂一单相大功率电阻性负载下,为实现三相电源均衡供电进行电路设计的过程,要求努力做到功率因数接近1。实验要求学生在教师的启发下进行电路设计,独立分析电感参数L和电容参数C与负载R的关系,计算参数;进行计算机仿真实验,调试参数,直到达到设计要求。在设计过程中让学生加深对三相电路的学习,理解功率因数及单相负载三相均衡供电的实际意义。最后,再用实际元件实现三相均衡供电电路,初步锻炼同学们的工程设计能力。

The main purpose to design an experiment of a single-phase load three-phase balanced power supply circuit is under a factory in the simulation of a single-phase power resistive load, for the realization of three-phase balance power supply circuit design process, requiring efforts to achieve power factor close to 1. Experiments require students to be inspired by the teachers to design a circuit and analyze independently the relationship between the inductance parameter L, capacitance parameter C and R load, calculating parameters; including computer simulation experiments, debugging parameters until it reaches the design requirements. Let the students have a better understanding of the three- phase circuit during the design process, and also understand the practical meaning of the power factor and the single-phase load three-phase balanced power supply circuit. Finally, using the actual components to achieve a balanced three-phase power supply circuit, initially exercise engineering students＇ design capabilities.