This work presents a new interactive tool for the study of the quality of power supply signals generated by an inverter. The tool has interactive elements to model and implement PWM techniques in a power inverter, it allows to modify any parameter of the PWM technique during the control of the inverter, being this a great advantage to make a lot of tests in a short time. In addition, the tool allows to design offline and simulate the behavior of the load that will feed the inverter. For the realization of the tool was used the graphic programming language Labview, for the control an Atmega328-PU microcontroller and an inverter Semikron-Semitech. A total of 1438 tests were carried out on a dhalander motor in 72 hours with two PWM techniques modelled with the tool, which made it possible to study the feed signal and the motor behaviour in the whole range of possible values that the parameters defining each PWM technique could take. The tool provides a great help to the experimental study of the quality of the power supply signals generated with an inverter for the power supply signal.