AEVA Forums

There is also 'Uni-seal' made by Electropar available from Hayman's Electrical.

If you read the report at lowcvp.org.uk, you will see that the article in the Australian woody has referred to, seriously misrepresents the Report. (Who's surprised that a Murdoch paper should do such a thing!) The Report is mainly concerned with broadening the life-cycle analysis of emissions. It a...

Cometboy,

My point was that current can't just flow to the chassis and stop there like a puddle; it has to flow from +ve to -ve.
Just it goes via the chassis. That is, there must be leakage from +ve to chassis and also from -ve to chassis.

I see from the new NCOP 14 in paragraph 2.9 that there should be "less than 20mA" leakage current from HAZV to "chassis or ELV components". This current must be flowing between the +ve and -ve of the main battery terminals-- presumably via the chassis which must then have a definite potential with r...

I know this is slightly off-topic, but on the subject of heating, I wonder if anyone has effected or even considered using the waste heat from water-cooled controllers (Wavesculptor) which would be about 500W for 10KW output and 95% controller efficiency (from Tritium's graph in the Datasheet) to pa...

Evric, I also have a Mean Well SCN 800 (Watt) DC-DC converter which I bought for $35 from Oatley Electronics. An applied voltage between 0 and 5v sets the output voltage, which I have adjusted to 13.8. Curiously, a computer memory back up Li battery of 3.7V gives just the right output. I hadn't deci...

I am interested to learn how people have set up these control systems. Evric, you say you don't need the DC-DC converter other than during main pack charge, due to its capacity of 33Ahr. But why store extra energy in a heavy lead-acid battery when the storage in the lighter Lithium pack is more weig...

If the "ignition" switch has two positions, one for the DC-DC converter via a small contactor, and the second position for the main contactor driving the controller, and if no auxilliary loads are on, then the current draw would be just for that small contactor plus the charging current into the aux...

Yes, 10A equipment will work, but not for ever. Make sure the plug/socket mating is clean and firm. It should give you a few years.

Why not just use a FET, suitably rated for say 200V, with probably less than half an ohm ON resistance. At low currents that gives you a negligible power loss. Drive the FET gate from the 12V supply.

In my experience, fixing various appliances, pulling 10A from a 10A outlet with a 10A plug leads to burnout eventually. Better to use a 15A plug and socket for currents near 10A.

Thanks for taking trouble over the photos. That's a whole lot of gear: buses, cables, units etc, and a current sense loop I see also.

I was planning on 108 or 112 cells, so that would require seven DCM units.
And without actually getting a quote yet, it seems as though the price would be about the same as the small individual cell modules you refer to, but with a display as well, as you say.

Well, whatever you can do.
Actually no IGBTs in a control device I shouldn't think; more a question of software and a communication bus.
It looked like a sophisticated star-type BMS system with lots of data reporting. Price?

I look forward to the possibility that you will both report your experience with this BMS system.

Correct me if I'm wrong, but isn't EMC less serious on the DC bus due to the controller's front end capacitance? Should one then attend to the controller to motor cables, say, by arranging them in trefoil configuration and putting them in a flexible metallic conduit, while the DC bus cabling could b...

Many thanks acmotor. I had been wondering. I notice that Tritium's WaveSculptor docs had not mentioned shielding, hence the question.

On the topic of radio interference, is it necessary in an AC installation to shield the cables running from controller to motor?

If I can get this clear with the assistance of the AC wizards: Given that power increases only as long as V increases with f, the maximum line-line voltage of the Wavesculptor at 320V determines a frequency above which higher frequencies offer no more power, just more speed and less torque. So a mot...