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Author Topic: Server power supply for quick charging?  (Read 2396 times)

Psycopyro

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Re: Server power supply for quick charging?
« Reply #30 on: September 02, 2017, 09:36:44 PM »

I found the technical datasheet of the power supply nexus 7000 but not so much information about outputs. It seems that is 50v-120A.

I understood that the overcurrent protection of PSUs shall be "constant current type" to simulate a dedicated charger.

If overcurrent occurs, this PSU shut down: https://www.cisco.com/c/en/us/support/docs/switches/nexus-7000-series-switches/118956-technote-n7k-00.html
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togo

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Re: Server power supply for quick charging?
« Reply #31 on: September 05, 2017, 12:16:32 PM »

It says
PS_1 total capacity:    6000 W   Voltage:50V
PS_2 total capacity:    6000 W   Voltage:50V
PS_3 total capacity:    6000 W   Voltage:50V

It says there are two 3000 watt "chords" for each of the above as well, and that they take 220vac.  No indication of how they react to being overvolted or undervolted.  Yesterday, I saw stations running less than 200V and the Diginow handled them just fine.

It doesn't indicate that the voltage is at all tunable.  That makes sense to me, since this appears to be a power supply for a very specific Cisco switch.

If you want to repurpose a nonvehicular supply, You'll need to find ones that can be set to 116v max or ones that have isolated DC output so they can be stacked, like Burton does with his Meanwell stack (and Terry and Brandon used to do).

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togo

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Re: Server power supply for quick charging?
« Reply #32 on: September 05, 2017, 12:18:24 PM »

...
Charging on the road isn't much of an issue with me, as I own 8 motorcycles, six are ICEs.  I normally only use the Zeros for short distances, but sometimes it's nice to be able to extend the range a bit while having a meal or whatever. I find these E-cycles so fun to ride as long as I am not trying for a long distance. 
...

Brandon was telling us how he used to ride all around LA with no charger at all, since he had chargers stashed at various places... : - )
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