ﯾﮏ ﻣﺒﺪل ﺑﺴﯿﺎر اﻓﺰاﯾﻨﺪه ﺟﺪﯾﺪ ﺑﺎ ﮐﻠﯿﺪزﻧﯽ ﻧﺮم و ﻗﺎﺑﻠﯿﺖ اﻓﺰاﯾﺶ ﺷﺎﺧﻪ ﻫﺎي ﻣﻮازي ﺑﺪون ﻧﯿﺎز ﺑﻪ ﻣﺪار ﮐﻤﮑﯽ ﺟﺪﯾﺪ

A New Soft Switching High Step-Up Converter Ability to Increase Parallel Branches without the Need for a New Auxiliary Circuit

در اﯾﻦ ﻣﻘﺎﻟﻪ ﯾﮏ ﻣﺒﺪل ﺑﺴﯿﺎر اﻓﺰاﯾﻨﺪه درﻫﻢ ﺗﻨﯿﺪه ﺑﺎ ﻣﺪار ﮐﻤﮑﯽ ﺳﺎده اراﯾﻪ ﺷﺪه اﺳﺖ. ﻣﺪار ﮐﻤﮑﯽ ﭘﯿﺸﻨﻬﺎدي داراي ﺳﻠﻒﻫﺎي ﺗﺰوﯾﺞ ﺷﺪه ﺑﺎ ﺳﻠﻒﻫﺎي اﺻﻠﯽ ﻣﺒﺪل اﺳﺖ و ﺷﺮاﯾﻂ ﮐﻠﯿﺪزﻧﯽ در وﻟﺘﺎژ ﺻﻔﺮ را ﺑﺮاي ﮐﻠﯿﺪﻫﺎي اﺻﻠﯽ ﻣﺒﺪل ﻓﺮاﻫﻢ ﻣﯽﮐﻨﺪ. از ﻃﺮﻓﯽ ﮐﻠﯿﺪ ﮐﻤﮑﯽ و دﯾﻮدﻫﺎي ﻣﺪار ﮐﻤﮑﯽ داراي ﮐﻠﯿﺪزﻧﯽ در ﺟﺮﯾﺎن ﺻﻔﺮ ﻫﺴﺘﻨﺪ و ﺑﻪ ﻫﻤﯿﻦ دﻟﯿﻞ ﺗﻠﻔﺎت ﻣﺤﺴﻮﺳﯽ ﺑﻪ ﻣﺒﺪل ﺗﺤﻤﯿﻞ ﻧﻤﯽﮐﻨﻨﺪ. از دﯾﮕﺮ وﯾﮋﮔﯽ ﻣﺪار ﮐﻤﮑﯽ اﻣﮑﺎن اﻓﺰاﯾﺶ ﺷﺎﺧﻪﻫﺎي ﻣﻮازي ﻣﺒﺪل اﻓﺰاﯾﻨﺪه ﺑﺪون اﺿﺎﻓﻪﮐﺮدن ﻣﺪار ﮐﻤﮑﯽ ﺟﺪﯾﺪ اﺳﺖ، ﻟﺬا ﻣﺒﺪل ﻣﯽﺗﻮاﻧﺪ ﺑﻪ راﺣﺘﯽ ﺑﺮاي ﺗﻮانﻫﺎي ﺑﺴﯿﺎر ﺑﺎﻻ ﻧﯿﺰ ﻃﺮاﺣﯽ ﮔﺮدد. ﻣﺒﺪل ﭘﯿﺸﻨﻬﺎدي از روش ﺳﻠﻒﻫﺎي ﺗﺰوﯾﺞ ﺷﺪه ﺿﺮﺑﺪري ﺑﺎ ﺧﺎزنﻫﺎي ﺑﺎﻻﺑﺮﻧﺪه ﺳﺮي ﺑﺮاي اﻓﺰاﯾﺶ ﺑﻬﺮه وﻟﺘﺎژ و ﮐﺎﻫﺶ اﺳﺘﺮس وﻟﺘﺎژ روي ﮐﻠﯿﺪﻫﺎي اﺻﻠﯽ، اﺳﺘﻔﺎده ﮐﺮده اﺳﺖ. ﻣﺒﺪل ﺑﺴﯿﺎر اﻓﺰاﯾﻨﺪه ﭘﯿﺸﻨﻬﺎدي ﺑﻪﻃﻮر ﻣﺸﺮوح ﺗﺤﻠﯿﻞ ﮔﺸﺘﻪ و ﯾﮏ ﻧﻤﻮﻧﻪ ﻋﻤﻠﯽ از آن در ﺗﻮان 100 وات ﭘﯿﺎدهﺳﺎزي ﮔﺮدﯾﺪه اﺳﺖ. ﻧﺘﺎﯾﺞ ﻋﻤﻠﯽ درﺳﺘﯽ ﻋﻤﻠﮑﺮد ﻣﺪار و ﺗﺤﻠﯿﻞ ﻫﺎي ﺗﺌﻮري را ﺗﺎﯾﯿﺪ ﻣﯽﮐﻨﻨﺪ.

In this paper, an interleaved high step-up converter with a simple auxiliary circuit is presented. The proposed auxiliary circuit has the coupled inductor with the input inductors of the converter and provides zero voltage switching conditions for the main switches of the converter. On the other hand, auxiliary switches and diodes of auxiliary circuit operate under zero current condition and therefore do not impose significant losses on the converter. The auxiliary circuit is modular and can apply to more phases of the converter. Therefore, the converter can be easily designed for very high power applications. The proposed converter uses the cross-coupled inductors technique with series lift capacitors to increase the voltage gain and reduce the voltage stress on the main switches. Also, leakage inductance energy can be easily absorbed by the clamp capacitors and helps to increasing the voltage gain. The proposed high step-up converter has been analyzed in detail and a practical prototype has been implemented at 100W. The experimental results confirm the correctness of the operation of the circuit and the theoretical analysis.