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A 160 A IGBT Welding Power Source with 100 kHz Output Switching F...
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| Author(s) |
E. Lourenço; E. Margato; P. Verdelho |
| Abstract |
In this paper a welding power source using electronic power conversion techniques is described. A dc
current power source gives 160 A under a maximum 35 V arc voltage. The power input may be
obtained directly from the public electricity supply network through a AC-DC voltage rectifier. The
transformer primary coil voltage is obtained by a 50 kHz full wave IGBT Voltage Source Inverter
(VSI). The welding current rectification is obtained by a full wave diode bridge operating after the
transformer secondary coil. This topology will allow maximum output dc current grow factors and a
output switching frequency of 100 kHz. Applying non-linear control techniques a very fast dynamic
for the dc current control is obtained without steady state error and with low current ripple. This
process has however the drawback of requiring a average current control external loop of the
transformer primary side, with the propose of prevent the emergence of a dc component. A relative
simple control circuit is obtained. |
| Download |
| Filename: | EPE1999 - PP00640 - Lourenço.pdf |
| Filesize: | 103.1 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-03-24 by System |
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