Abstract




 
   

IJE TRANSACTIONS B: Applications Vol. 31, No. 8 (August 2018) 1228-1233    Article in Press

PDF URL: http://www.ije.ir/Vol31/No8/B/10-2891.pdf  
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  A NEW SINGLE-PHASE SYMMETRICAL CASCADE MULTILEVEL INVERTER WITH LOW NUMBER OF POWER SWITCHES
 
M. Arehpanahi and D. Paknia
 
( Received: December 11, 2017 – Accepted in Revised Form: March 09, 2018 )
 
 

Abstract    In this paper a new 5-level single phase symmetrical cascade multi-level inverter is proposed. The proposed topology contains combination of unidirectional and bidirectional power switches based on output voltage level number. The number of power switches and withstanding voltage of powers witches were reduced related to the other topologies. This configuration can be extended to the n-level inverter. In symmetrical case of proposed inverter the 5th harmonic output voltage will be eliminated. The performance analysis of the proposed inverter using suitable switching algorithm for producing the 5-level output voltage was confirmed by simulation and experimental results.

 

Keywords    : cascade inverter, multi-level, harmonic distortion, bidirectional switches, unidirectional switches and harmonic elimination

 

چکیده    در این مقاله یک اینورتر تکفاز سری متقارن جدید ارائه شده است. در ساختار پیشنهادی از کلیدهای قدرت یک طرفه و دو طرفه با توجه به تعداد پله های ولتاژ خروجی استفاده شده است. تعداد کلیدهای قدرت و ولتاژ معکوس دو سر آنها در مقایسه با سایر ساختارها کاهش یافته است. ساختار ارائه شده قابلیت تبدیل به اینورتر n سطحی را دارد. در حالت متقارن هارمونیک پنجم ولتاژ خروجی حذف خواهد شد. بررسی کارایی طرح پیشنهادی در قالب یک اینورتر 5 سطحی شبیه سازی و پیاده سازی شده است.

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