| Products > Test Equipment |
| High Current AC Source |
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| Kean:
ITECH China has the IT7800 which can be paralleled for high current. Won't be cheap, but it may be cheaper than the other (non DIY) options mentioned. https://itechate.com/en/product/ac-power-supply/IT7800.html I have no experience with these large units, but do I have a little ITECH IT7321 Programmable AC PSU on my bench. |
| Martin72:
For higher current simulations we use a transformer with one additonal winding on the core. We get nearly 100A this way while only 1A primary current is flowing. So buying a welding transformer and feed him with a low/medium power source ist the cheapest way to gain the 400A current. |
| tautech:
--- Quote from: Martin72 on July 09, 2023, 10:20:50 pm ---So buying a welding transformer and feed him with a low/medium power source ist the cheapest way to gain the 400A current. --- End quote --- Hmm, my 400A AC 2 phase stick welder cost me just $200. Duty cycle at full tit is another consideration fan cooled or not. |
| Stray Electron:
--- Quote from: freeelectrons on July 09, 2023, 07:11:57 pm ---It does not seem like there are many accurate programmable ac current sources available. --- End quote --- Oh yes there are! Pacific Scientific and Elgar just to name two of them. I don't know how high their current ratings are but they are very accurate voltage and frequency wise and they are programmable. I THINK you can also couple several Elgar units together to increase their current output and drive all of them from a single control module. What kind of voltage output do you need? 400 amps is a lot of current and if you need that amount at any significant voltage, it's going to be a hell of a lot of Power! If you just need a volt or two then you might be able to use an Elgar 251 or one of their 750 Watt models set to say 110 VAC and use that to drive a transformer that will give 400 Amps at 1/2 to 1 volt AC. I've used the Elgar 251s and some of the PS units and I know that Elgar makes a 750 Watt output model and I think they make larger models but I have no experience with them. |
| freeelectrons:
--- Quote from: Martin72 on July 09, 2023, 10:20:50 pm ---For higher current simulations we use a transformer with one additonal winding on the core. We get nearly 100A this way while only 1A primary current is flowing. So buying a welding transformer and feed him with a low/medium power source ist the cheapest way to gain the 400A current. --- End quote --- Any links or recommendations? We use the secondary of this transformer https://www.tescometering.com/product/loading-transformer/ like an auto transformer to double our current but compliance voltage begins to be a concern. |
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