Search found 988 matches

by T1 Terry
Wed, 16 Oct 2019, 09:16
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 506
Views: 35728

Re: Prelude conversion project - some questions

As far as the "Beaching itself" back when I worked for Western Road Bus Service, we had a bus that would bottom out mid way between the wheels on a few intersections with deep gutter drains that were part of the normal route. Rather than continually having the passengers freak out at the scrapping a...
by T1 Terry
Wed, 16 Oct 2019, 08:59
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 41
Views: 1875

Re: Making home EV ready

So, back to the strange nom cell voltage thing. Can you confirm the end of charge battery voltage please Richard? My back of the envelope I'm doing my calculations on is getting rather hard to read now I've made so many changes :lol:

T1 Terry
by T1 Terry
Tue, 15 Oct 2019, 12:06
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 41
Views: 1875

Re: Making home EV ready

So, 96 x 4.2v = 403.2v, so stop at 400vdc would keep the cells just under the 4.2v mark. So the series string needs 12 panels now for an STC open circuit voltage of 462vdc and an operating temp open circuit voltage of around 408v @ 50*C. The bugger now is the 462vdc open circuit with cold panels is ...
by T1 Terry
Tue, 15 Oct 2019, 10:40
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 41
Views: 1875

Re: Making home EV ready

Terry - I think the Kona is either 96 or 98 cells in series - when fully charged it hits 400-407 V DC. So the 356v divided by 98 cells in series puts the nominal voltage at 3.63v per cell and 98 cells @ 4.2v = 411v. So the 407v is with the cells just below the 4.2v mark, but the 3.63v nom is a stra...
by T1 Terry
Tue, 15 Oct 2019, 08:30
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 41
Views: 1875

Re: Making home EV ready

I found it after a few Google searches, 356v ... I'm guessing that is nominal so what is the nominal voltage of each cell? Non of the standard nom battery voltages divide evenly into 356v so maybe that is end of charge voltage? 86 x 4.135v = just short of 356vdc. The voltage is well within the solar...
by T1 Terry
Fri, 11 Oct 2019, 10:15
Forum: General EV Discussion
Topic: Making home EV ready
Replies: 41
Views: 1875

Re: Making home EV ready

Does anyone know what voltage the Kona battery pack is? I've been seriously thinking about a solar array wired to meet the voltage of my chosen EV so I can direct charge the EV battery. If the voltage is less than 450vdc then I can also use the EV's battery to power the inverter to run the house at ...
by T1 Terry
Thu, 10 Oct 2019, 13:56
Forum: EV Motoring
Topic: The Aptera is back
Replies: 26
Views: 954

Re: The Aptera is back

I wonder if you can get an add on package that includes the wings and tail .... and maybe a propeller so you can get up enough speed to take off into a headwind and glide to the next destination :lol: Solar powered and will travel 60km on a full charge, my plug in Prius is solar powered and will tra...
by T1 Terry
Wed, 09 Oct 2019, 14:16
Forum: Charging Infrastructure
Topic: Rural Fast Chargers + Servicing infrastructure in Rural areas
Replies: 5
Views: 388

Re: Rural Fast Chargers + Servicing infrastructure in Rural areas

I know it isn't particularly fast charging, but caravan parks have 15 amp outlets. It is at least a last resort method of recharging and could be useful if over night stops were planned to use a caravan park cabin or on site van for the accommodation. Staying at a pub or motel would be another optio...
by T1 Terry
Tue, 01 Oct 2019, 13:53
Forum: Members Machines
Topic: Brendon_m Moke
Replies: 159
Views: 12716

Re: Brendon_m Moke

Make the steady out of aluminium and add bushings to take the initial shock loads at the joint ends. aluminium is a lot more forgiving than cast or even steel, it can stretch and compress small amounts that take the initial shock load. This is why high performance ICE engines use aluminium con rods,...
by T1 Terry
Sat, 28 Sep 2019, 12:17
Forum: Nissan
Topic: Leaf in the tropical north
Replies: 16
Views: 876

Re: Leaf in the tropical north

Something I've always wondered, if heat rises and cold falls, wouldn't blowing cold air above the battery pack and exhausting it below the battery pack a better method for cooling? I see all these cooling plates the cells sit on, but wouldn't that be the coolest part of the cell? Tesla run pipes up ...
by T1 Terry
Sat, 28 Sep 2019, 09:51
Forum: Electric motors and controllers
Topic: Nidec In wheel Motor
Replies: 3
Views: 408

Re: Nidec In wheel Motor

20" wheels, sound suited to truck 22"wheels eh. Isn't that truck company Tesla now owns building just that? A hub motor capable of only 50kW would revolutionise the trucking industry. A prime mover has 4 rear wheels, that's 200kW on the ground, add a dolly to tow a trailer, that has 6 wheels on the ...
by T1 Terry
Wed, 25 Sep 2019, 15:38
Forum: Renewable Energy and Storage (Non-EV)
Topic: Sumry Inverter-Charger in Caravan
Replies: 7
Views: 400

Re: Sumry Inverter-Charger in Caravan

An RVD, not an RCD because an RCD will only work if there is an earth/neutral bond before the RCD. If you are never going to plug into shore power that will have its own RCD and earth/neutral bond, then get your sparkie to make the earth/neutral bond after the inverter but before the RCD. The proble...
by T1 Terry
Wed, 25 Sep 2019, 10:41
Forum: Renewable Energy and Storage (Non-EV)
Topic: Is anyone using an arc welder with an offgrid system
Replies: 105
Views: 4740

Re: Is anyone using an arc welder with an offgrid system

Skip the copper stake bit, that is to make a connection back to the transformer or the power generator. You have the power generator on board in the form of an inverter. If the generator is a plug in device and has a fault to the metal frame and that is sitting on the ground, the stake will make a c...
by T1 Terry
Sat, 21 Sep 2019, 09:38
Forum: Batteries, charging, management and monitoring
Topic: Cooling chargers?
Replies: 10
Views: 410

Re: Cooling chargers?

Just a thought, they made small diameter paper filters for minis and other Leyland product as well as aftermarket filters, mainly aimed for use with SU and CD Stromberg type carburettors. One of those on Richard's drum fan suggestion would fit easy enough, but if you have a 12vdc supply available yo...
by T1 Terry
Fri, 20 Sep 2019, 10:07
Forum: Batteries, charging, management and monitoring
Topic: Cooling chargers?
Replies: 10
Views: 410

Re: Cooling chargers?

Thanks T1 Terry. Good ideas! I hadn't thought of air filters either so this morning I will be off to my local car spare parts place to see what they have. Thanks again Paul Something simple like the round air filter from the old 6cyl Holden is a big enough area to fit fans inside and cheap as chips...
by T1 Terry
Thu, 19 Sep 2019, 15:46
Forum: Batteries, charging, management and monitoring
Topic: Cooling chargers?
Replies: 10
Views: 410

Re: Cooling chargers?

My TC charger has a huge heatsink on top with 2 x 12v fans wired in series. I ended up finding a wall wart that put out 12vdc so I could add it to the 240vac power supply side from the outside plug in point in the side of the car. Now the fan starts up when I plug it in rather than when it feels lik...
by T1 Terry
Thu, 19 Sep 2019, 12:57
Forum: General EV Discussion
Topic: AC 3 phase motor fee spinning
Replies: 10
Views: 481

Re: AC 3 phase motor fee spinning

Ahhh.... just read your last post Richard, 245vdc battery might be a bit over the top then :lol: I could drive it in mostly 2nd and 3rd gear and just use 4th for highway cruising with a possible 160km/h and still have good torque to get it/hold it there .... be cool for drag racing eh

T1 Terry
by T1 Terry
Thu, 19 Sep 2019, 12:52
Forum: General EV Discussion
Topic: AC 3 phase motor fee spinning
Replies: 10
Views: 481

Re: AC 3 phase motor fee spinning

Whoops - I see the mistake - sorry divided by 0.82 not multiply :oops: Total ratio should be more like 4.80:1 4200 RPM would be 874.5RPM at the wheel. Which comes out to 106kph. So even having the nominal at 80kph/3169RPM that's 100Vac/142Vdc What controller was this going on? Big Mouses? I have a ...
by T1 Terry
Wed, 18 Sep 2019, 10:38
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 506
Views: 35728

Re: Prelude conversion project - some questions

What if you flipped the cooler circuits over so they all met up in the centre. Then you could feed the cold in at the 3rd pack from the end and let it split both ways on each side. That way 2 packs on each loop from cold and all feeding into the hot return.

T1 Terry
by T1 Terry
Tue, 17 Sep 2019, 16:18
Forum: General EV Discussion
Topic: AC 3 phase motor fee spinning
Replies: 10
Views: 481

Re: AC 3 phase motor fee spinning

My '74 Kombi has a 2.0ltr gearbox, one of the 5 rib super strong case models, these have the highest diff ratio of all the air cooled engine models. These are the actual road speed to rpm for each different model gearbox as they left the factory. '67 and before had reduction hubs between the gearbox...
by T1 Terry
Mon, 16 Sep 2019, 15:59
Forum: General EV Discussion
Topic: AC 3 phase motor fee spinning
Replies: 10
Views: 481

Re: AC 3 phase motor fee spinning

The motor I'm looking at using is a rewound to 48v 3 phase WEG132 motor. First asked about it here http://forums.aeva.asn.au/viewtopic.php?f=34&t=4267 then again here http://forums.aeva.asn.au/viewtopic.php?f=34&t=4135&p=50960&hilit=VW+Kombi#p50960 This is an induction motor so all should be fine, t...
by T1 Terry
Mon, 16 Sep 2019, 13:43
Forum: General EV Discussion
Topic: AC 3 phase motor fee spinning
Replies: 10
Views: 481

AC 3 phase motor fee spinning

I want to start converting my VW Kombi to electric, but a few issues have held me back. The primary one is I want to tow it behind our motorhome with an "A" frame rather than on a trailer. One of the problems is the Kombi gearbox can not be towed for long periods in neutral. Much like most manual ge...
by T1 Terry
Fri, 13 Sep 2019, 12:07
Forum: Members Machines
Topic: Brendon_m Moke
Replies: 159
Views: 12716

Re: Brendon_m Moke

What colour for the roll bar and the front? Certainly looking good but much harder to hide it or get a guaranteed no block in parking spot. They know you won't risk scratching a pretty paint job, but the recycled urban camo look certainly give you lots of parking room and makes the other driver thin...
by T1 Terry
Sat, 07 Sep 2019, 11:39
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048MK inverter
Replies: 157
Views: 10619

Re: PIP-5048MK inverter

i can surely see that i was a little too greedy thinking i could go for a 4s2p setup for this inverter, and that might explain why i was kind of stable in my 3s2p setup with no dips, and now when i put on 2 more panels i got the dips. Actually it is running perfectly fine on a complete sunny day, b...
by T1 Terry
Sat, 07 Sep 2019, 11:22
Forum: Renewable Energy and Storage (Non-EV)
Topic: PIP-5048MK inverter
Replies: 157
Views: 10619

Re: PIP-5048MK inverter

Yes. Tindo 275 W panels are 60 cell, so 3S is fine for a 145 V max solar charge controller. But many panels are 72 cell these days, and 3S causes too-high panel voltages. I know you understand that very well, Terry, but it seems that some others need it spelled out. Agreed, in this case the reply w...