Abstract : This paper provides a general overview of the structure and function of each part of an AC-DC-AC voltage-source inverter circuit. The focus is on analyzing two operating states of the inverter section: stable operation and commutation process. In the analysis of the stable operation state, the magnitudes of the negative phase voltage and negative line voltage under six different operating states are given. In the analysis of the commutation process, two of the six commutation processes are explained in detail. This paper is helpful for undergraduate/associate degree students in electrical engineering. Keywords : AC-DC-AC voltage-source inverter; rectifier stage; inverter stage; stable operation state; commutation process [b]1 Circuit Diagram and Working Principle of AC-DC-AC Inverter 1.1 Circuit Diagram[/b] The circuit diagrams are shown in Figures 1, 2, and 3. [align=center] Figure 1 Rectifier Section Figure 2 Simplified Diagram of AC-DC-AC Frequency Converter Circuit [/align] 1.2 Working Principle of AC-DC-AC Frequency Converter The working principle of the AC-DC-AC frequency converter is as follows: First, the mains frequency AC power is converted into DC power by the rectifier, and then the DC power is converted back into AC power by the inverter. The amplitude and frequency of the AC power output by the frequency converter are adjustable. The AC-DC-AC frequency converter consists of three parts: a rectifier stage, a DC stage, and an inverter stage. [b][align=center]For more details, please click: Analysis of AC-DC-AC Voltage Type Frequency Converter Circuit Constructed Using Thyristors[/align][/b]