Zivan Efficiency

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leadwings
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Zivan Efficiency

Post by leadwings » Sat, 05 Mar 2011, 00:06

Has anyone loged their Zivan efficiency, ie kW from the mains to kW to the batteries?

From what I can tell it is around low 80%?

antiscab
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Zivan Efficiency

Post by antiscab » Sun, 06 Mar 2011, 14:47

The Zivan NG3 has a passive input filter (inductor + cap) tuned to give best PF correction at almost full power (drawing 20A from the mains IIRC)

at light load, the PF is not that great, meaning more losses on the input rectifier bridge.
The efficiency varies depending upon what the output is (and to a lesser extend what the input is)



I once measured the efficiency of the Zivan NG3 in the UWA Getz:
In: 2232W, 2938VA, PF:0.76
Out: 13A@146v
putting the efficiency at 85%

Thats only one data point along the charge curve.

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leadwings
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Zivan Efficiency

Post by leadwings » Tue, 08 Mar 2011, 16:53

Thanks Matt - I'm running mine at 10A max from the wall socket (just to make sure I don;t burn it out) so I guess I will be less efficient.

I should have my battery side ammeter set up soon, so can calculate the power on each side.

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leadwings
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Zivan Efficiency

Post by leadwings » Thu, 10 Mar 2011, 17:38

Zivan Efficiency Test

Managed to take some readings from my setup last night. I have a power meter plugged in at the 240V wall socket that measures what is coming out of the wall, then put a clamp meter on the line from the Zivan to the batteries.

I run my Zivan at 10A from the wall max, so I’m not overloading the GPO or house electrics.

From the wall: 9.9 A, 240 V, 1790 W (I didn’t look at the power factor, but it seems to be quite low)
Out of the charger: 10 A x 162 V = 1620 W.

So that makes it running at 90% efficiency. Pretty good.

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acmotor
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Zivan Efficiency

Post by acmotor » Sun, 13 Mar 2011, 06:49

So pf = 1790/2376 =.753 sounds typical.
In reality a very poor pf for a 10A device.

The tebechop 48V(45-60) 50A supply I just bought has pf 0.97 at full load.
iMiEV MY12     105,131km in pure Electric and loving it !

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Mesuge
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Zivan Efficiency

Post by Mesuge » Sun, 13 Mar 2011, 11:27

Tuarn, sounds like "high-tech" one of these?
http://fr.benning.de/en/corporate/produ ... 00-hd.html
- Remote control with modem, HTML or SNMP (option)
That would be sweet, but mucho dollares Image

btw. with input (85 – ~275 VAC) thinking about globe tour in EV?
The efficiency for >200VAC is depicted in graph as ~92% (and 91% for the older Slimline model) not bad for aircooled brick at all, but there is the limit, it should have been on watercooled chill plate for EV purposes.

In terms of ducats, it could be perhaps a bit cheaper set it up from the entry Slimline series (used/ebay) as 2modules + 1remote control unit, all that fits into 19" rack, think garage stationary charging.

-

With their Tebevert inverter you can turn EV into V2G mode and power some external AC appliances, but that would require some sort of bidirectionality on your 48V sub bus wiring..
http://fr.benning.de/en/corporate/produ ... rters.html
Last edited by Mesuge on Sun, 13 Mar 2011, 01:24, edited 1 time in total.
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acmotor
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Zivan Efficiency

Post by acmotor » Mon, 14 Mar 2011, 04:02

Yes, that is the stable mine came from but it was earlier model off ebay.

There is some seriously nice equipment on the market ! (big dollars for newest and greatest)

Actually, I picked up 3 for 7.5kW charge off 3 phase at 48V (45-60V) to 144V (135-180V) with outputs series or parallel. Inputs connected as star with neutral off 3 phase.
iMiEV MY12     105,131km in pure Electric and loving it !

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