Reducing electromagnetic interferences in flyback AC-DC converters based on the frequency modulation technique

Gökhan ÇABUK; Selçuk KILINÇ

Makale detayları

Reducing electromagnetic interferences in flyback AC-DC converters based on the frequency modulation technique

Yazarlar:

Gökhan ÇABUK | Selçuk KILINÇ

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Electrical Engineering and Computer Science 2012 Vol.20 Issue 1, pp.71-86

Belge Tipi:

Makale

Yayın Tarihi:

12/2011

Belge Dili:

Türkçe

Document ID (Org No.):

2000743631

Sıklık:

İki Aylık

eISSN:

1303-6203

pISSN:

1300-0632

Özet:

 

One of the most preferable types of switched-mode power  supplies (SMPS) is the flyback converter, due to its wide range of  application areas.  Properties such as low cost, provision of multiple  output voltage terminals, and higher efficiencies make it important,  and hence its usage in technologies including cell phone chargers,  personal computers, set-top boxes, and televisions is increasing.  Special attention should be paid to the design of this type of  converter due to its working principles and electromagnetic  interference (EMI) performance.  Rapid switching of high current and  high voltage during the operation of SMPS causes an EMI problem.  The  level of the EMI noise should be reduced in order to not interfere  with the operation of other equipment.  One of the methods for  mitigating EMI emissions is the frequency modulation (FM) technique.  In this paper, the FM technique, which has been increasingly used as  an EMI-reduction method in SMPS, is investigated.  The modulation  technique that was applied to the switching frequency of the flyback  converter is analyzed and its effect on the EMI performance is  discussed.  The FM technique was tested on an AC-DC flyback converter  prototype that was built with an L6566B integrated circuit.  Conducted  emission noises from the SMPS were measured using an EMI receiver.  Experimental results showed that EMI levels were reduced after the  application of the FM method.

 

One of the most preferable types of switched-mode power  supplies (SMPS) is the flyback converter, due to its wide range of  application areas.  Properties such as low cost, provision of multiple  output voltage terminals, and higher efficiencies make it important,  and hence its usage in technologies including cell phone chargers,  personal computers, set-top boxes, and televisions is increasing.  Special attention should be paid to the design of this type of  converter due to its working principles and electromagnetic  interference (EMI) performance.  Rapid switching of high current and  high voltage during the operation of SMPS causes an EMI problem.  The  level of the EMI noise should be reduced in order to not interfere  with the operation of other equipment.  One of the methods for  mitigating EMI emissions is the frequency modulation (FM) technique.  In this paper, the FM technique, which has been increasingly used as  an EMI-reduction method in SMPS, is investigated.  The modulation  technique that was applied to the switching frequency of the flyback  converter is analyzed and its effect on the EMI performance is  discussed.  The FM technique was tested on an AC-DC flyback converter  prototype that was built with an L6566B integrated circuit.  Conducted  emission noises from the SMPS were measured using an EMI receiver.  Experimental results showed that EMI levels were reduced after the  application of the FM method.

Makale detayları

Reducing electromagnetic interferences in flyback AC-DC converters based on the frequency modulation technique

Yazarlar: Gökhan ÇABUK | Selçuk KILINÇ

Yayıncı: TUBITAK

Dergi: Turkish Journal of Electrical Engineering and Computer Science 2012 Vol.20 Issue 1, pp.71-86

Belge Tipi: Makale

Yayın Tarihi: 12/2011

Belge Dili: Türkçe

Document ID (Org No.): 2000743631

Sıklık: İki Aylık

eISSN: 1303-6203

pISSN: 1300-0632

Sayı

Yazarlar:

Gökhan ÇABUK | Selçuk KILINÇ

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Electrical Engineering and Computer Science 2012 Vol.20 Issue 1, pp.71-86

Belge Tipi:

Makale

Yayın Tarihi:

12/2011

Belge Dili:

Türkçe

Document ID (Org No.):

2000743631

Sıklık:

İki Aylık

eISSN:

1303-6203

pISSN:

1300-0632