Current Limiter needed, pls help....

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ckwtampines

Thread Starter
Joined
Aug 25, 2003
Messages
5
Hi,

I need to build a current limiter with the following specs, can anyone help? My current limiter has to be a max of 10A, it goes from a 3 phase altenator to some batteries. The specs are as below.

Altenator
KVA = 8 @ Amps 11.1
KW = 6.4 @ Amps 8.8
Voltage 240 V phase to neutral
415V 3 phase
Freq = 50Hz
Speed 1500rpm.

Battery
3.7V X 90
=333V

Thanks
Clement
 
Joined
Aug 17, 2003
Messages
17,584
You need a lot more than a "Current Limiter" from reading your post. Its not as simple as limiting the alternator output connection to the batteries. The alternator is 3 phase AC. You need a single rail DC voltage.

First you need to have a 3 phase bridge rectifier, and then a regulator circuit. This circuit would normally give the "current limiting" that you need.

At a battery bank voltage of 333v, its likely to be a specifically designed bit of gear, and not something easily found "on the shelf".

Depending on what earthing / Neutral arrangements exist, you may have a problem getting a DC voltage high enough to charge the batteries without a step-up transformer.

Is the 333v nominal or charging voltage?
Phase to Neutral rectified would give 339 v peak, less any regulator head voltage.
 

eddie5659

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Malware Specialist
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Mar 19, 2001
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37,282
Moved you to Hardware, where you may get more replies :)

eddie
 
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