Twelve-sided polygonal voltage space vector based multilevel inverter for an induction motor drive with common-mode voltage elimination

被引:59
作者
Lakshminarayanan, Sanjay [1 ]
Mondal, Gopal
Tekwani, P. N.
Mohapatra, K. K.
Gopakumar, K.
机构
[1] Indian Inst Sci, Ctr Elect Design & Technol, Bangalore 560012, Karnataka, India
[2] Nirma Univ Sci & Technol, Ahmadabad 382481, Gujarat, India
[3] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA
关键词
common-mode voltage elimination (CME); multilevel inverter; polygonal voltage space vector;
D O I
10.1109/TIE.2007.899929
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
In this paper, a 12-sided polygonal voltage space vector generation with common-mode voltage. elimination (CME) is proposed for an induction motor drive. An open-end winding configuration is used for the motor. The proposed multilevel structure is achieved by cascading only the conventional two-level inverters with asymmetrical de link voltages. By appropriately selecting the voltage vectors with identical common-mode voltage from the opposite ends, a pulsewidth modulation.(PWM) strategy with zero common-mode voltage variation can, be achieved for the entire modulation range with a common dc link requirement for both the inverter systems. Along with the CME, the proposed 12-sided polygonal space vector based multilevel inverter structure has increased modulation range with the absence of 5th, 7th, 17th, 19th, etc., harmonics up to 12-step operation. The bandwidth problems associated with conventional hexagonal voltage space vector structure current controllers due to the presence of 5th and 7th harmonics in the overmodulation region are absent in the present 12-sided structure. So a simple PWM voltage control with linear voltage control up to 12-step operation is possible from the present 12-sided scheme with less current control complexity.
引用
收藏
页码:2761 / 2768
页数:8
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