Abstract




 
   

IJE TRANSACTIONS B: Applications Vol. 32, No. 2 (February 2019) 277-285    Article in Press

PDF URL: http://www.ije.ir/Vol32/No2/B/13-3016.pdf  
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  VOLTAGE REGULATION OF A NEGATIVE OUTPUT LUO CONVERTER USING A PD-PI TYPE SLIDING MODE CURRENT CONTROLLER
 
A. Goudarzian and A. Khosravi
 
( Received: September 19, 2018 – Accepted in Revised Form: January 03, 2019 )
 
 

Abstract    This paper describes a new design for direct sliding mode method with a high switching frequency using the PD-PI type sliding surface applied to a negative output Luo converter worked in continuous current mode for applications required constant power source such as aerospace applications, medical equipment and etc. Because of the output power and line changes, the converter model is also nonlinear and time varying. In addition, losses dissipation and voltage drops caused a deviation between the theoretical and actual output voltage of this converter. For improvement of the converter performance along with the current and voltage regulations, a nonlinear controller is required. This suggested controller is proper to inherently variable structure of the converter and can cope with nonlinearities associated with its model. The goal is to ensure a satisfactory response for the converter. The practical results showed that the proposed strategy helps to eliminate the voltage error along with continuous current operation of the converter in very light loads and high switching frequency in different operating points.

 

Keywords    DC/DC converter NOLC Sliding mode current control Control design

 

چکیده   

این مقاله یک کنترل کننده مد لغزشی جدید نوع PD-PI برای مبدل NOLC در حالت هدایت پیوسته ارائه می¬دهد. بخاطر تغییرات بار و ولتاژ وروی، دینامیک مبدل به شدت غیرخطی است. برای بهبود عملکرد مبدل و تنظیم جریان ورودی و ولتاژ خروجی مبدل، یک کنتلرغیرخطی نیاز است. کنترل¬کننده پیشنهادی متناسب با ذات پیچیده مبدل است. نتایج عملی نشان دهنده عملکرد سیار خوب کنترلریشنهادی هستند که قادر است با حذف خطای دائم ولتاژ، مبدل را در بارهای بسیار سبک و فرکانس کلیدزنی بالا در نقاط کاری مختلف کنترل کند.

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