02-09-2017, 10:36 AM
The field of power electronics is so important today because of the latest development of solid-state devices. These devices significantly save energy when used for the conversion and control of energy-based electronic energy systems such as photovoltaic systems, fuel cells, wind farms, active harmonic filters and low energy consumption motors. The penetration of the investors in these applications has increased enormously during the last decade. This paper presents the inverted three phase topology used to control the speed of the induction motor. The Simulink model based three-phase converter was fed to the IM unit using the MATLAB / Simulink software. The harmonics of the three-phase induction motor inverter are analyzed for operating modes 1200, 1800 and 1500. It is concluded from the simulation results of an inverter-controlled induction motor that the 150o operating mode has less Harmonic Distortion Total compared to other mode of operations.
In this trip control strategy, one of the three legs of the inverter must be intentionally opened, one by time in a previously planned sequence. This strategy combines the commonly used driving modes of 180 ° and 120 ° to generate a new mode of operation, defined as 150 ° driving mode. The performance of the proposed dynamic voltage restorer with 150 ° drive angle control is evaluated by dynamic transient simulation to illustrate the advantages of the new control scheme. The results of the simulation show a good improvement in the magnitude and the temporal response of the output voltage of the dynamic voltage restorer. This results in a more accurate and faster voltage restoration capability. In addition, a great reduction in the total harmonic distortion of the output voltage of the inverter is achieved, and consequently a consequent reduction of voltage harmonics on the supply side.
In this trip control strategy, one of the three legs of the inverter must be intentionally opened, one by time in a previously planned sequence. This strategy combines the commonly used driving modes of 180 ° and 120 ° to generate a new mode of operation, defined as 150 ° driving mode. The performance of the proposed dynamic voltage restorer with 150 ° drive angle control is evaluated by dynamic transient simulation to illustrate the advantages of the new control scheme. The results of the simulation show a good improvement in the magnitude and the temporal response of the output voltage of the dynamic voltage restorer. This results in a more accurate and faster voltage restoration capability. In addition, a great reduction in the total harmonic distortion of the output voltage of the inverter is achieved, and consequently a consequent reduction of voltage harmonics on the supply side.