Direnç nokta kaynağı (DNK), otomotiv, beyaz eşya, mobilya ve sac işleme endüstrilerinde yaygın olarak kullanılmaktadır. Orta frekans doğru akım (OFDA) ise DNK kalitesini arttıran, yenilikçi bir yöntemdir. Bu çalışmada, OFDA-DNK sistemlerinden kaynak akım bilgisini elde edebilen bir analog integratör devre önerilmiştir. OFDA-DNK sisteminin kontrolü için ihtiyaç duyulan bu akım bilgisi, Rogowski bobininden (RB) elde edilmiştir. Kaynak transformatörünün sekonderine bağlanan RB üzerinden, kaynak akımı ile ilgili gerilim bilgisi alınmıştır. Daha sonra önerilen integratör devre yardımıyla analog sayısal dönüştürücüye veri aktarımı gerçekleştirilmiştir. Önerilen devrenin başarımı, oluşturulan OFDA-DNK sisteminde test edilmiştir. Deneysel sonuçlara göre, önerilen devrenin yaklaşık 30 kA akıma kadar gerilim dönüşümünü hatasız bir şekilde yapabildiği görülmüştür. Ayrıca, önerilen devre için, OFDA-DNK uygulamalarında analog sayısal dönüştürücüye (ASD) doğrusal akım ölçüm verisi gönderebilecek potansiyele sahip olduğu söylenebilir.
Resistance spot welding (RSW) is widely used in the automotive, white goods, furniture and sheet metal processing industries. Medium frequency direct current (MFDC) is an innovative method that increases the quality of RSW. In this study, an analog integrator circuit that can obtain the welding current information from MFDC-RSW systems is proposed. This current information required for the control of the OFDA-DNK system was obtained from the Rogowski coil (RB). Voltage information regarding the welding current has been obtained through the RB connected to the secondary of the welding transformer. Then, data transfer to analog-digital converter (ADC) was carried out with the help of the proposed integrator circuit. The performance of the proposed circuit has been tested in the established MFDC-RSW system. According to the experimental results, it has been seen that the proposed circuit can perform the voltage conversion up to 30 kA without error. In addition, it can also be said that the proposed circuit has the potential to send linear current measurement data to ADC in MFDC-RSW applications.
Primary Language | Turkish |
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Subjects | Electrical Engineering |
Journal Section | Research Articles |
Authors | |
Publication Date | August 31, 2021 |
Submission Date | May 26, 2021 |
Acceptance Date | July 13, 2021 |
Published in Issue | Year 2021 Volume: 26 Issue: 2 |
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