Comparative Study on 2-Level and 3-Level Voltage-Source Inverters
Voltage-source inverters (VSIs) are widely used to control the speed and torque of three-phase squirrel- cage induction motors (IMs), which represent the most important electrical load in industry Nowadays, different VSI-technologies are commercially available, having different impacts on the performance and reliability of IMs. When compared to the two-level VSIs, the three-level VSIs are typically seen as an expensive solution. However, in some applications, three-level VSIs can lead to significant improvements in the reliability and performance of the IMs, justifying the additional investment from a life-cycle cost perspective. In this paper, the main conclusions of a comparative study between low-power, low-voltage, two-level and three-level VSIs applied to IMs, are presented. This study is based on simulated and experimental results and includes considerations on motor and inverter losses, inverter output voltage wave quality, motor vibrations, motor acoustic noise, motor electrical insulation stress, and bearing currents, considering steady-state operation. Economical considerations are also presented. The outcomes of the presented study are useful for motor users, helping them to decide technically and economically between both analyzed technologies.
Fernando O. T. E. Ferreira Anibal T. de AImeida
Dep. of Electrical Engineering, Engineering Institute of Coimbra (ISEC), Coimbra, Portugal ISR-University of Coimbra, Dep. of Electrical and Computer Engineering, Coimbra, Portugal
国际会议
北京
英文
581-602
2007-06-10（万方平台首次上网日期，不代表论文的发表时间）