Gorazd Štumberger (Author), Klemen Deželak (Author), Drago Dolinar (Author), Beno Klopčič (Author)

Abstract

This paper deals with the acoustic noise emissions caused by the transformer operating as a part of DC/DC converter in an industrial resistance spot welding system. The discussed DC/DC converter is schematically shown in Fig. 1. The three-phase alternating voltages (u1, u2 and u3) are rectified and smoothed in order to obtain almost constant DC-bus voltage UDC. The H-bridge inverter is used to supply the transformerćs primary winding with voltage pulses uH. The two transformerćs secondary windings are connected to the two output rectifier diodes (D1 and D2) which provide the direct welding current iL flowing through the load represented by LL and RL. A new control scheme forresistance spot welding systems was proposed in [1,2]. During the testing of the proposed control scheme it became evident that the proposed control scheme not only improves utilization of the iron core and prevent it from becoming saturated, but also substantially reduces the acoustic noise emissions caused by the transformer. The reasons for reduction of acoustic noise emission are discussed in this paper.

Keywords

DC/DC converter;acoustic noise emissions;

Data

Language: English
Year of publishing:
Typology: 1.06 - Published Scientific Conference Contribution (invited lecture)
Organization: UM FERI - Faculty of Electrical Engineering and Computer Science
UDC: 621.3
COBISS: 1024095324 Link will open in a new window
Views: 2779
Downloads: 50
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Other data

Secondary language: Unknown
URN: URN:SI:UM:
Type (COBISS): Not categorized
Pages: Str. 5-6
Keywords (UDC): applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;engineering;technology in general;inženirstvo;tehnologija na splošno;mechanical engineering in general;nuclear technology;electrical engineering;machinery;strojništvo;electrical engineering;elektrotehnika;
ID: 6063
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