Search found 3558 matches

by Richo
Today, 12:59
Forum: Renewable Energy and Storage (Non-EV)
Topic: Is anyone using an arc welder with an offgrid system
Replies: 82
Views: 1896

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

Mmmm I've seen plenty of popped fets over the years. What is unusual is the broken left leg. If this is the gate then that is floating. Floating gates are bad. They have a tendency to turn on when you don't want to. I'd say the leg was stressed from bending to fit into the PCB. The heatsink moved du...
by Richo
Today, 12:50
Forum: Members Machines
Topic: Rolf's 1959 Puch SR150 scooter
Replies: 16
Views: 168

Re: Rolf's 1959 Puch SR150 scooter

The peak is 11kW for 30secs. Accounting for some looses thats ~260A into the controller. The 150A LTO BMS cuts out at 200A. The 200A LTO BMS cuts out at 360A. Is your controller the SR483 or SR484? The SR483 is 300/350A. The SR484 is 400/460A. Either way I think the 200A LTO BMS looks correct. The ...
by Richo
Today, 12:32
Forum: Batteries, charging, management and monitoring
Topic: SOC vs Pack Voltage
Replies: 6
Views: 53

Re: LFP SOC vs Pack Voltage

weber wrote:
Today, 10:13
... it's because it's flat.
Yep I agree determining SoC from OCV is a waste of time.
Use a current integrator thingo...
by Richo
Yesterday, 12:22
Forum: Members Machines
Topic: Rolf's 1959 Puch SR150 scooter
Replies: 16
Views: 168

Re: Rolf's 1959 Puch SR150 scooter

Nice!
Is that the controller I see in there too..
by Richo
Fri, 19 Jul 2019, 12:57
Forum: Technical and conversion discussion
Topic: EV Conversion battery requirements
Replies: 8
Views: 148

Re: EV Conversion battery requirements

The high voltage parts are usually filled with random inert gasses.
Arcing and all that..
Briswolf wrote:
Wed, 17 Jul 2019, 15:20
blown up cars in otherwise good nick are not too rare.
Ha ha I'm waiting for a blown up 86 :lol:
by Richo
Fri, 19 Jul 2019, 12:54
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 309
Views: 20717

Re: Prelude conversion project - some questions

Sorry I can't see your brass nuts because of your long rod.
I would have thought 100RHS would be more appropriate.
by Richo
Fri, 19 Jul 2019, 12:40
Forum: Batteries, charging, management and monitoring
Topic: Battery interconnect sizing
Replies: 48
Views: 704

Re: Battery interconnect sizing

That's why I suggested before nickel plated parts as they can be soldered to.

Was it a local plating job?
by Richo
Tue, 16 Jul 2019, 12:54
Forum: Batteries, charging, management and monitoring
Topic: Battery interconnect sizing
Replies: 48
Views: 704

Re: Battery interconnect sizing

Hmmm nickel plating aluminium.
Don't think I've seen that.

I'd still just nickel plate copper by choice for a busbar.

Aren't the headway ends nickel plated steel?
by Richo
Tue, 16 Jul 2019, 12:44
Forum: Electric motors and controllers
Topic: Motor and controller info pls
Replies: 6
Views: 139

Re: Motor and controller info pls

Yeah that's what I thought at first but the ADC motor's I've seen have the vent+brushes at the rear of the motor. And the rear of the motor isn't a solid plate against the body. Its also short for an 8" motor. I was trying to find if there was info on the vitara conversion. Could always test the mot...
by Richo
Tue, 16 Jul 2019, 12:37
Forum: Batteries, charging, management and monitoring
Topic: Disposing of old lithium batteries
Replies: 8
Views: 141

Re: Disposing of old lithium batteries

some ships carrying lithium batteries caught fire. ... The end result will most likely be that it is not viable to recycle the batteries in Australia until the volume increases beyond a certain level. We could just "short circuit" all of that and set fire to them now. :lol: Envirostream looks inter...
by Richo
Fri, 12 Jul 2019, 12:53
Forum: Electric motors and controllers
Topic: Motor and controller info pls
Replies: 6
Views: 139

Re: Motor and controller info pls

Hmmmmm
Are your sure this isn't one of those Goombi kits?!?
https://forums.aeva.asn.au/viewtopic.php?p=26891#p26891
by Richo
Thu, 11 Jul 2019, 12:39
Forum: Members Machines
Topic: Rolf's 1959 Puch SR150 scooter
Replies: 16
Views: 168

Re: Rolf's 1959 Puch SR150 scooter

I suggest getting some cardboard or foam and mocking up the motor in place.
Then you can see how much room is left for batteries.
I'd suspect this will determine what batteries you can use and how many.
by Richo
Wed, 10 Jul 2019, 13:01
Forum: Members Machines
Topic: Rolf's 1959 Puch SR150 scooter
Replies: 16
Views: 168

Re: Rolf's 1959 Puch SR150 scooter

Oh and your cycle life will go from 2,000 to 20,000.
Win - win.
by Richo
Wed, 10 Jul 2019, 12:59
Forum: Members Machines
Topic: Rolf's 1959 Puch SR150 scooter
Replies: 16
Views: 168

Re: 1959 Puch SR150 scooter

But if I can cruise at 65km/h, then That will do So given you're on a scooter not a Zero. You're only doing 65kph not 100kph. So the 1875Wh perhaps becomes 1500Wh BUT then add another 25% for margin this is back to 1875Wh. At 48V this is a 40Ah battery. Well here are the 40Ah LTO's. https://forums....
by Richo
Wed, 10 Jul 2019, 12:46
Forum: Technical and conversion discussion
Topic: EV Conversion battery requirements
Replies: 8
Views: 148

Re: EV Conversion battery requirements

From this I can only infer that one possible method of ensuring the HAZV isolation is to break up the battery pack into smaller packs, each isolated from each other, when the car is turned off. Is this an absolute requirement? No. Many of the production cars don't. Some of the hybrids only have one...
by Richo
Tue, 09 Jul 2019, 12:59
Forum: Members Machines
Topic: Rolf's 1959 Puch SR150 scooter
Replies: 16
Views: 168

Re: 1959 Puch SR150 scooter

My understanding is that speed is relative to voltage. Is this correct? Mostly. The motor you picked out has an RPM constant of 93.45 RPM/V. So the more voltage the more RPM. BUT the formula for power requirements versus speed for your scooter is exponential. So there will be a point that they inte...
by Richo
Tue, 09 Jul 2019, 12:43
Forum: Members Machines
Topic: Rolf's 1959 Puch SR150 scooter
Replies: 16
Views: 168

Re: 1959 Puch SR150 scooter

I'll check on how much space I have and see if I can fit 4 packs in I'm not too sure what you mean by packs. Normally batteries are put in parallel then connected in series. You shouldn't have a 48V pack that is connected in parallel with another 48V pack. If they are 15Ah each 4 packs is 60Ah whic...
by Richo
Tue, 09 Jul 2019, 12:38
Forum: Members Machines
Topic: Rolf's 1959 Puch SR150 scooter
Replies: 16
Views: 168

Re: 1959 Puch SR150 scooter

Rolf wrote:
Mon, 08 Jul 2019, 13:41
The tyres are 12 inch.

Once it runs, I'll play with the gearing
So I was more after the circumference of the tyre.
I can work out what the ratio should roughly be.
Normally the tyres have the width and aspect ratio printed on them.
by Richo
Tue, 09 Jul 2019, 12:32
Forum: Members Machines
Topic: Rolf's 1959 Puch SR150 scooter
Replies: 16
Views: 168

Re: 1959 Puch SR150 scooter

Rolf wrote:
Mon, 08 Jul 2019, 13:41
So max continuous current is 72A? (Based on 48V and 3500W)
I think 3.5kW was the output/mechanical power.
Input would probably be closer to 90A.
by Richo
Mon, 08 Jul 2019, 12:52
Forum: Members Machines
Topic: Rolf's 1959 Puch SR150 scooter
Replies: 16
Views: 168

Re: 1959 Puch SR150 scooter

Motor: Motoenergy ME0909 Ideally, I would like to be able to do 100Km/h, but hope I can set this up with gearing via chain cogs. The ME0909 is rated for 4.8HP/3.5kW continuous. Which perhaps around 65kph continuous. So you might be able to get to 100kph but you'd be hitting the peak of the motor. T...
by Richo
Mon, 08 Jul 2019, 12:38
Forum: Members Machines
Topic: Rolf's 1959 Puch SR150 scooter
Replies: 16
Views: 168

Re: 1959 Puch SR150 scooter

Round trip is 15Km. Can I get away with 2 packs of 15 @ 16Ah? but I based this estimation on Richo's comment in Soyachip's FZR250 thread. Oh Jeez people listen to me :oops: So I based it on the specs on the Zero which is similar to Soyachips bike. I'd kinda hope that it would fair slightly better f...
by Richo
Mon, 08 Jul 2019, 12:23
Forum: Members Machines
Topic: Rolf's 1959 Puch SR150 scooter
Replies: 16
Views: 168

Re: 1959 Puch SR150 scooter

Rolf wrote:
Mon, 08 Jul 2019, 11:17
I would like to be able to do 100Km/h, but hope I can set this up with gearing via chain cogs.
What size are the tyres?
by Richo
Wed, 26 Jun 2019, 13:27
Forum: Batteries, charging, management and monitoring
Topic: Battery interconnect sizing
Replies: 48
Views: 704

Re: Battery interconnect sizing

:lol:

Yep it does
I made a small ali plate with the dremel and that was bad enough.

I agree phatter is better.
But I still think that there should be enough info here to actually work it out and not just rule of thumb it.
by Richo
Wed, 26 Jun 2019, 13:07
Forum: Batteries, charging, management and monitoring
Topic: Battery interconnect sizing
Replies: 48
Views: 704

Re: Battery interconnect sizing

... I need to use double the cross section I’m using for copper But so far your reference is your 50mm2 copper cable. The current capability of a cable is relative to its insulation, temperature rise and how its mounted. This is NOT the same as the busbar. It doesn't have any insulation. So the onl...