Search found 3692 matches

by Richo
Fri, 20 Sep 2019, 08:50
Forum: For Sale/Wanted
Topic: 20 x Leaf Cells
Replies: 25
Views: 1224

Re: 20 x Leaf Cells

Well if I get stuck I'm coming around for your wire :lol:
by Richo
Thu, 19 Sep 2019, 12:53
Forum: Batteries, charging, management and monitoring
Topic: Cooling chargers?
Replies: 10
Views: 232

Re: Cooling chargers?

Centrifugal fan with a cowling over all the intake vents.

Image
by Richo
Thu, 19 Sep 2019, 12:36
Forum: General EV Discussion
Topic: AC 3 phase motor fee spinning
Replies: 10
Views: 301

Re: AC 3 phase motor fee spinning

So you could go over 4500 rpm with the 200v battery. Not 200V - that was my mistake. The battery voltage should be more like 120-140Vdc for the nominal at ~80kph. It will still do 4500RPM and get to 110kph. The actual max speed of the Kombi with eV system isn't relevant due to the fear factor. :lol:
by Richo
Thu, 19 Sep 2019, 12:27
Forum: For Sale/Wanted
Topic: 20 x Leaf Cells
Replies: 25
Views: 1224

Re: 20 x Leaf Cells

Populating is finished, code is written, bench tests are done. I had been waiting for the power Fuses for the power wiring. The Leafs cell terminals are M6, my test PCB terminals are M6 but the fuses were M5 :roll: Anyway I just need to make one more set of power leads - tomorrow(Friday). Which mean...
by Richo
Wed, 18 Sep 2019, 13:16
Forum: Batteries, charging, management and monitoring
Topic: C-Ion "Battery" Skepticism
Replies: 3
Views: 142

Re: C-Ion "Battery" Skepticism

To be on the game they need to get to 250Wh/kg.
So their 180g "battery" needs 45Wh 162kJ and have a voltage of 14.7V.
:lol:
by Richo
Wed, 18 Sep 2019, 13:07
Forum: Batteries, charging, management and monitoring
Topic: C-Ion "Battery" Skepticism
Replies: 3
Views: 142

Re: C-Ion "Battery" Skepticism

https://cleantechnica.com/2019/02/01/zapgos-carbon-ion-battery-delivers-ultra-fast-charging-zero-degradation/ So what I read here is the improvement to the breakdown voltage of the capacitor. Most supercaps are around 2.7V where as the current C-Ion is 3.4V. If we use 100Wh/kg which is similar to s...
by Richo
Wed, 18 Sep 2019, 12:35
Forum: General EV Discussion
Topic: AC 3 phase motor fee spinning
Replies: 10
Views: 301

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?
by Richo
Tue, 17 Sep 2019, 15:08
Forum: Batteries, charging, management and monitoring
Topic: C-Ion "Battery" Skepticism
Replies: 3
Views: 142

C-Ion "Battery" Skepticism

So there has been a few news reports around about ZapGo's C-Ion "Battery". https://www.businesswire.com/news/home/20190910005668/en/ZapGo%E2%80%99s-Carbon-Ion-Battery-Expected-Charge-Electric-Vehicles https://www.smart-energy.com/industry-sectors/storage/new-battery-technology-to-charge-an-ev-100-ti...
by Richo
Tue, 17 Sep 2019, 14:38
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 27
Views: 543

Re: To import or to build? New to EV's

4.5kW/9kW seems a bit under powered.
I'd be surprised if you could get to 100kph.
Nice price tho
by Richo
Tue, 17 Sep 2019, 13:10
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 27
Views: 543

Re: To import or to build? New to EV's

Here's a motor + controller for $3,277.91.

https://www.ebay.com.au/itm/Motenergy-E ... ctupt=true
by Richo
Tue, 17 Sep 2019, 13:03
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 27
Views: 543

Re: To import or to build? New to EV's

mikedufty wrote:
Mon, 16 Sep 2019, 21:37
Fairly pricey I think... at $12,500.
Me thinks too :lol:

You do a whole conversion less than that.

I'd start with the ME1507 motor.
by Richo
Tue, 17 Sep 2019, 12:51
Forum: General EV Discussion
Topic: AC 3 phase motor fee spinning
Replies: 10
Views: 301

Re: AC 3 phase motor fee spinning

195/75R14 has c=2.035m 5.857:1 diff 4th is 0.82:1 Total ratio 7.143:1 110kph=30.55m/s 15.01RPS=900.9RPM Motor RPM = 6,435 6,435/1500=4.29xFn Normally you wouldn't set the nominal voltage for 110kph/205Vac/291VDC as the motor will still spin at a higher RPM with less power. 90kph=5265RPM=168Vac=238VD...
by Richo
Mon, 16 Sep 2019, 15:06
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 27
Views: 543

Re: To import or to build? New to EV's

Mikeymcblimey wrote:
Mon, 16 Sep 2019, 14:57
...it seems simple...
Well until money gets involved and time and family...
by Richo
Mon, 16 Sep 2019, 15:05
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 27
Views: 543

Re: To import or to build? New to EV's

Mikeymcblimey wrote:
Mon, 16 Sep 2019, 13:26
Ive come across qsmotors on a few forums and had a look on their site.
I was under the impression QS motors were hub motors - more aimed at scooters.
The prices are on aliexpress.
by Richo
Mon, 16 Sep 2019, 14:50
Forum: General EV Discussion
Topic: AC 3 phase motor fee spinning
Replies: 10
Views: 301

Re: AC 3 phase motor fee spinning

Well induction motor wouldn't have any of those problems.
Permanent magnet would produce a back EMF (AC volts) but if its disconnected would be the same as a power point with nothing plugged into it.
The power is only generated once it is connected to something.
by Richo
Mon, 16 Sep 2019, 14:46
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 27
Views: 543

Re: To import or to build? New to EV's

Sure that'll do it. So the process would be: 1. Decide IF you want to convert or go for a production vehicle 2. If you're converting pick out the type of donor vehicle. 3. Pick out the motor to match the performance you want for the vehicle. 4. Select a controller to run that motor. 5. Select batter...
by Richo
Mon, 16 Sep 2019, 12:53
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 27
Views: 543

Re: To import or to build? New to EV's

I'm not a speedster and much prefer the style of a cafe racer or cruiser to sports bikes I just want to observe that power/performance of ev's is never an issue if we don't define what we mean by that. Well in this case Mikey did sort of indicate the motorbike he was after. A 250cc are in the range...
by Richo
Mon, 16 Sep 2019, 12:46
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 27
Views: 543

Re: To import or to build? New to EV's

You could always look through what other people have done
http://www.evalbum.com/type/MTCY
They will have a list of they main parts they used to convert a motorcycle.

http://www.evalbum.com/4933
by Richo
Mon, 16 Sep 2019, 12:36
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 27
Views: 543

Re: To import or to build? New to EV's

bladecar wrote:
Mon, 16 Sep 2019, 12:05
Just occasionally, I observe a "pushbike" motoring by, with a battery container on it and I think, "that thing seems to almost have the abilities of an electric motorcycle.
Mmmm I've seen those top end electric bicycles.
I followed one at 90kph in an 80 zone :o
All quite illegal.
by Richo
Mon, 16 Sep 2019, 12:33
Forum: General EV Discussion
Topic: To import or to build? New to EV's
Replies: 27
Views: 543

Re: To import or to build? New to EV's

petrol bikes don't tend to have much room for batteries, which limits you somewhat I don't think that the hub motors are that great at the moment. So the real issue is trying to fit the batteries AND the motor in the frame. A few weeks back I was looking at the Nighthawk cafe racer 250. They still ...
by Richo
Thu, 12 Sep 2019, 12:54
Forum: Scooters, mopeds and electric toys
Topic: Upgrading 24V mobility scooter from PB to LiFePO4 batts
Replies: 16
Views: 464

Re: Upgrading 24V mobility scooter from PB to LiFePO4 batts

My guess is they just copied the add from a 36V unit and forgot to change one number.
by Richo
Thu, 12 Sep 2019, 12:51
Forum: Scooters, mopeds and electric toys
Topic: Upgrading 24V mobility scooter from PB to LiFePO4 batts
Replies: 16
Views: 464

Re: Upgrading 24V mobility scooter from PB to LiFePO4 batts

brendon_m wrote:
Thu, 12 Sep 2019, 12:47
I'm definitely not vouching for it or its quality.
No I understand - its there for consideration as an option not as a specific "buy this" one.
Realistically I think it is probably the easiest option.
by Richo
Thu, 12 Sep 2019, 12:48
Forum: Scooters, mopeds and electric toys
Topic: Upgrading 24V mobility scooter from PB to LiFePO4 batts
Replies: 16
Views: 464

Re: Upgrading 24V mobility scooter from PB to LiFePO4 batts

Here's a summary:

18650 1.44kg for $300
Bike pack 2.5kg for $295
Headway 2.7kg for $224
LTO-10S 3.7kg for $430
LTO-12S 4.4kg for $515
SLA 16kg for $210