The Voltage-source Inverter (VSI) is a fundamental power electronic drive where high-performance control for Three-phase electrical machines can be achieved. The continuous improvement of power devices that increasingly improve their performance, such as High Electron Mobility Transistor (HEMT) devices, allows higher efficiencies and more and more wide range of use. The Inverter is not only a Three-phase bridge made by three Half-bridge legs but also needs other elements for its correct operation. For example, the stability of the Voltage source required by the Three-phase bridge is key to optimizing its performance. Also, the Inverter and machine Protection elements allow having a safe behavior in the abnormal situations that prevent its destruction and other near components. These Protection elements which join the control logic constitute the Motor Control Units (MCU)). The analysis of the switching and conduction losses in the power devices is analyzed in detail, as well as the effects of capacitances, Inductance, and parasitic resistances. The key elements, such as Gate driver, are also analyzed and even for devices in parallel. The effects of high dv/dt are also analyzed, especially when the length of the connection Power cable between the Inverter and the machine is considerable, providing different solutions such as the use of Sinusoidal filter. In this chapter, all the necessary parts for the design of a VSI Inverter for control of Three-phase machines are entered in detail, providing simulations and results for better understanding, as well as a complete model of a VSI Inverter (power plant).
Analysis of Three-Phase Voltage-Source Inverters
Advances in Industrial Control
21.03.2020
113 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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