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Power supply for testing equipment


I need to build a power supply for a testing machine. The machine use a winch ewx12000winch (jeep winch) to test fall safety equipment.The motor for the winch use as input 12 volt, 5,4 kw and is normally used for the accu from the jeep. We already used an accu of a conveyer, but it can only be used twice and it died afterwards.

The new solution is to connect the motor with a transformer to the net, with also an ability to change the motor speed. In short terms I need a costumised power supply. I think I need a transformer who converts 230 volt to 12 volt with minimall 100 amperes. connected to a frequentiecontroller and this connected to the motor. Where can I find a transformer in the netherlands that convert 230 volt into 12 volt with 100 ampere?

Kind regards

Anh Khoa

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July 1, 2018 19:19

What duty cycle do you need? (How long between tests?)

A common approach in situations like this is to use batteries, with the AC->DC supply charging the batteries. If the winch is only active 1/4 of the time, your AC supply doesn't need to be near as hefty. The batteries can handle the high peak currents of full load, which is more than the 12 V at 100 amp you refer to.

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July 1, 2018 19:18

Looking at the winch spec I agree with Brads comment, the maximum current is 450A when the winch is full (4 layers of cable) and maximum load which I assume is where your 5.4kW input comes from. At this current you will even need to take care selecting the battery! The 100A you refer to is a no load test so it does depend at what load you wish to test.

June 28, 2018 10:06

That would be some power supply, the only one that I can find is the Mean Well 1.2kW Embedded Switch Mode Power Supply (764-6943). I have put a link top right of this page.

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June 28, 2018 10:09

For the Netherlands, the URL is:

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