Search found 3640 matches

by Richo
Tue, 09 Jul 2019, 12:38
Forum: Members Machines
Topic: Rolf's 1959 Puch SR150 scooter
Replies: 19
Views: 535

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: 19
Views: 535

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: 19
Views: 535

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: 19
Views: 535

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: 19
Views: 535

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: 1263

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: 1263

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...
by Richo
Wed, 26 Jun 2019, 12:35
Forum: For Sale/Wanted
Topic: Looking for unicorn droppings, budget 6k.
Replies: 14
Views: 660

Re: Looking for unicorn droppings budget 6k

Dan007a wrote:
Mon, 24 Jun 2019, 11:59
Tesla cells out of reach as of today( wife said no)
But they're just on the wall - well within reach.
FREE ENERGY :lol:

Sorry you just have to keep actively looking.
Something will turn up eventually.
by Richo
Wed, 26 Jun 2019, 12:33
Forum: For Sale/Wanted
Topic: Looking for unicorn droppings, budget 6k.
Replies: 14
Views: 660

Re: Looking for unicorn droppings budget 6k

Dan007a wrote:
Mon, 24 Jun 2019, 11:59
my ev...is looking for a 2nd hand 144v lithium batteries
Nope seems clear - lithium batteries, 2nd hand, 144V for his ev.
by Richo
Thu, 20 Jun 2019, 12:36
Forum: Batteries, charging, management and monitoring
Topic: Battery interconnect sizing
Replies: 48
Views: 1263

Re: Battery interconnect sizing

For small jobs you just end up with the Minimum Order Value.
Usually $65-100 depending on where you go.
by Richo
Wed, 19 Jun 2019, 12:56
Forum: Parts & Suppliers
Topic: Leaf cells
Replies: 40
Views: 8469

Re: Leaf cells

This is what I see on fleabay from the US so duties and taxes etc are added on top of this.

303178019365 $10356.75 360V 24kWh 48-cell
254243793381 $8897.65 360V 24kWh 48-cell
113168977255 $4430.43 7.6V 64Ah 8-cell
113326274993 $4036.60 7.6V 64A 8-cell
113168976693 $4094.96 7.6V 64A 8-cell
by Richo
Wed, 19 Jun 2019, 12:27
Forum: Parts & Suppliers
Topic: Leaf cells
Replies: 40
Views: 8469

Re: Leaf cells

What we really need is a Nissan dealer to get them in to sell it but turn the blind eye about which car its going in.
New cells.
Good price.
No import issues.
by Richo
Tue, 18 Jun 2019, 13:45
Forum: Parts & Suppliers
Topic: Leaf cells
Replies: 40
Views: 8469

Re: Leaf cells

How many are you interested in?
by Richo
Tue, 18 Jun 2019, 13:02
Forum: Batteries, charging, management and monitoring
Topic: Battery interconnect sizing
Replies: 48
Views: 1263

Re: Battery interconnect sizing

The height difference is 15mm but there is up to 2mm variation You also have to take off the thickness of the busbar. If you use 3mm then the difference would be 12mm. If you put a Washer at each end then your closer to 10mm. https://au.element14.com/ettinger/05-04-103/spacer-m4x10-ni/dp/1466853? A...
by Richo
Tue, 18 Jun 2019, 12:38
Forum: Batteries, charging, management and monitoring
Topic: Battery interconnect sizing
Replies: 48
Views: 1263

Re: Battery interconnect sizing

I keep thinking about those battery packs made up of lots of 18650 laptop cells and wondering how they get away with using small/thin tabs between the cells? What am I missing? Ahh they don't have much choice. And heat is related to cross sectional area AND length. If the lengths are short the loss...
by Richo
Tue, 18 Jun 2019, 12:30
Forum: Parts & Suppliers
Topic: Leaf cells
Replies: 40
Views: 8469

Re: Leaf cells

That is about the same price that Nissan claim to be selling new packs for replacement in existing Leafs. Do know if they are new or used? Although I do import volumes of stuff none of them are dangerous goods. Last time I found it still cheaper to let Suzi Auto import the batteries. Perhaps you can...
by Richo
Mon, 17 Jun 2019, 14:17
Forum: Technical and conversion discussion
Topic: Direct Drive options
Replies: 22
Views: 729

Re: Direct Drive options

You could also use a pulley with 1.13:1 with the 4.44 diff making a neat 5:1.
by Richo
Mon, 17 Jun 2019, 13:25
Forum: Batteries, charging, management and monitoring
Topic: Battery interconnect sizing
Replies: 48
Views: 1263

Re: Battery interconnect sizing

Stuff the bending - I'd go with M4 Metal spacers NPB F-F and just bolt the different height busbars together.

What's the height difference?
by Richo
Mon, 17 Jun 2019, 13:14
Forum: Technical and conversion discussion
Topic: Direct Drive options
Replies: 22
Views: 729

Re: Direct Drive options

Ahh that's because its an after market performance kit. https://shop.quaife.co.uk/quaife-cd-axle-unit-for-chain-driven-cars Anyway it looks like it would be AUD$6,000 + shipping. :o And 3.767:1 isn't that great either. :( So not realistic. For cost and ratio's I'd still look at a diff like the BMW a...
by Richo
Mon, 17 Jun 2019, 12:52
Forum: Electric motors and controllers
Topic: Open Source DC controller
Replies: 110
Views: 18458

Re: Open Source DC controller

And SiC Modules are even more expensive.
But you end up with the convenience of a FET but the robustness of an IGBT.
Soon...
by Richo
Mon, 17 Jun 2019, 12:51
Forum: Electric motors and controllers
Topic: Open Source DC controller
Replies: 110
Views: 18458

Re: Open Source DC controller

JonStarr wrote:
Fri, 14 Jun 2019, 16:25
Those IGBT bricks are also a bit expensive compared to discrete FETs and diodes.
The "cost" to engineer/design matched paralleled devices to work properly is usually more than just buying IGBT's.
If it's not right then you end up with cascade popping 8-)
by Richo
Mon, 17 Jun 2019, 12:46
Forum: Electric motors and controllers
Topic: Open Source DC controller
Replies: 110
Views: 18458

Re: Open Source DC controller

JonStarr wrote:
Fri, 14 Jun 2019, 16:25
I'm not sure exactly where those film caps are going though, looks like they are source-drain snubbers I think.
Yep that is correct - across the DC Bus.
Normally they go as close to the FET's +/- as possible.

On IGBT's they have matched spacing to bolt straight on.
by Richo
Fri, 14 Jun 2019, 12:59
Forum: Technical and conversion discussion
Topic: Direct Drive options
Replies: 22
Views: 729

Re: Direct Drive options

Have a look at the Quaife QBA2R in this link under fiat 500 drive train.

Reduction drive + reverse.
https://www.zcars.org.uk/kits/the-kit-guide/

Image
by Richo
Fri, 14 Jun 2019, 12:41
Forum: Technical and conversion discussion
Topic: Direct Drive options
Replies: 22
Views: 729

Re: Direct Drive options

Hmmm not quite what I was thinking...
https://www.mokeforum.com.au/index.php?topic=7783.0

Image