Search found 1524 matches

by heathyoung
Sep 05 2018 8:42pm
Forum: Battery Technology
Topic: Headway cells stopped working... Help?
Replies: 7
Views: 314

Re: Headway cells stopped working... Help?

"But with these 4 cells, they pull 0.3 amps"

Rooted. Massively high internal resistance. Not surprising they got hot.
by heathyoung
Aug 30 2018 7:14pm
Forum: Battery Technology
Topic: Headway cells stopped working... Help?
Replies: 7
Views: 314

Re: Headway cells stopped working... Help?

Hot cells is a very good indicator of high internal resistance - they basically boil off the electrolyte and get worse and worse.

High IR cells are only good for stationary applications and low current draw.
by heathyoung
Jul 26 2018 10:23pm
Forum: Items for Sale - Used
Topic: AUS - Vectrix and assorted EV parts
Replies: 0
Views: 217

AUS - Vectrix and assorted EV parts

I've been collecting bits and pieces for years now, just been fleeced through a divorce and need to have a cleanup and get some funds back again. All of this is in good working order. I'm located in Newcastle, N.S.W but happy to ship via pack-n-send etc to get this to you at your expense. I've got a...
by heathyoung
Jun 29 2018 11:12pm
Forum: Items for Sale - Used
Topic: AUS - 2KW Downhill Electric Bike - SOLD
Replies: 4
Views: 488

Re: AUS - 2KW Downhill Electric Bike - SOLD

NOW sold - Mods feel free to remove.
by heathyoung
Jun 25 2018 7:06pm
Forum: Items for Sale - Used
Topic: AUS - 2KW Downhill Electric Bike - SOLD
Replies: 4
Views: 488

AUS - 2KW Downhill Electric Bike - SOLD

Inspired by the concept of the stealth bomber, I set out to make a batshit crazy, no holds barred downhill rig, but without the weight of a rear hub motor (which kills the balance of the bike). Its based on a Craftworks DHR frame, and uses a GNG 1Kw setup which drives through the gears - Pushed hard...
by heathyoung
Dec 12 2017 12:36am
Forum: General Discussion
Topic: Boost 110v AC to 120v AC or slightly more
Replies: 13
Views: 955

Re: Boost 110v AC to 120v AC or slightly more

Old iron core halogen transformers work well for this.

You set them up as an autotransformer. A 50W unit will give you ~4.5A, as you are only using the secondary to do the heavy lifting. Add more in parallel to up your requirements.
by heathyoung
Dec 12 2017 12:29am
Forum: Battery Technology
Topic: Using a MPPT solar charge controller as a bulk charger
Replies: 18
Views: 1329

Re: Using a MPPT solar charge controller as a bulk charger

This MPPT charger will supply 82V at least, I've got it charging a 72V nominal battery bank, from a 50V 250W panel.
by heathyoung
Oct 24 2017 9:18pm
Forum: Battery Technology
Topic: Charge 52V Dolphin with this MPT-7210A?
Replies: 10
Views: 1067

Re: Charge 52V Dolphin with this MPT-7210A?

Its a boost converter MPPT - if input > output, then this will happen normally.

There has been quite a bit of testing with these, and people are reporting decent power, 4-500W.
by heathyoung
Oct 05 2017 12:06am
Forum: Items Wanted
Topic: looking for Ev car battery for solar system
Replies: 4
Views: 605

Re: looking for Ev car battery for solar system

Chevy / Holden Volt modules are the cheapest. Not the nicest form factor, but easy to split into 48V modules.
by heathyoung
Jun 26 2017 6:54pm
Forum: General Discussion
Topic: RIP Bob Carter / ES: bobc
Replies: 15
Views: 1357

Re: RIP Bob Carter / ES: bobc

He had a brilliant mind, will miss his posts immensely. He was an asset to the EV community.

RIP.
by heathyoung
Jan 30 2017 7:02pm
Forum: E-Bike Technical
Topic: Cheap LM2596HV dc-dc converters that BLOW UP
Replies: 7
Views: 644

Re: Cheap LM2596HV dc-dc converters that BLOW UP

Yeah I found a few of the exploding knockoffs too - wasn't real impressed...
by heathyoung
Dec 18 2016 10:19pm
Forum: E-Bike Technical
Topic: Voltage regulators
Replies: 3
Views: 410

Re: Voltage regulators

You will probably find that they only adjust the threshold of the LED for 'charger' systems (to indicate when the battery is 'full' - the current falls below a certain level). That's what the CH led is for.
by heathyoung
Nov 28 2016 12:58am
Forum: EV Business World
Topic: Desav 2, new E motorcycle
Replies: 13
Views: 1798

Re: Desav 2, new E motorcycle

Looks like the same motor as used in the Zero.

Bugger-all information on the page.
by heathyoung
Nov 20 2016 7:01pm
Forum: E-Bike General Discussion
Topic: Me1003 with 600a 100v controller w/ regen
Replies: 4
Views: 500

Re: Me1003 with 600a 100v controller w/ regen

What is the frame you are using? How did your 0-60 times improve?

Looks good, and your batteries are aircooled as well 8)
by heathyoung
Nov 17 2016 7:05pm
Forum: Items for Sale - New
Topic: MV electric motorcycles
Replies: 28
Views: 3382

Re: MV electric motorcycles

And ECE papers also opens the possibility of sale to Australia / New Zealand as well, two markets with very little in the way of electric motorcycles, apart from the (uber expensive) Zero.
by heathyoung
Nov 14 2016 6:20pm
Forum: Items for Sale - New
Topic: MV electric motorcycles
Replies: 28
Views: 3382

Re: MV electric motorcycles

That TORK one looks very interesting. http://torkmotorcycles.com/ and http://torkmotorcycles.com/specification.html Pricing - $125000 INR = $2500 AUD (??!!) Although the asterix indicates 'government subsidies' 48V 72AH - 3.4Kwh - 100Kph takes roughly 7-8Kw to maintain on a flat road, so you would g...
by heathyoung
Nov 08 2016 1:06am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Vectrix Battery Connectors help
Replies: 5
Views: 722

Re: Vectrix Battery Connectors help

You should be able to parallel the booster by putting between the shunt negative and the positive-most battery terminal. You can disconnect the main anderson and anderson splitter (mounted on the top battery) while you connect the booster. There is a small pair of molex connectors that have an LED o...
by heathyoung
Nov 06 2016 11:02pm
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1713
Views: 174958

Re: Lebowski's motor controller IC, schematic & setup, new v

Good encoders incorporate all of these features - A/B, Halls and Index Zero.
Vectrix_Encoder.jpg
Vectrix_Encoder.jpg (216.64 KiB) Viewed 1857 times
Price is another question though...
by heathyoung
Nov 02 2016 7:45pm
Forum: Items for Sale - New
Topic: MV electric motorcycles
Replies: 28
Views: 3382

Re: MV electric motorcycles

Interesting. I'd like to know how you can get a 150Kg bike to 128Kph with a 3Kw motor... The 10Kw version looks interesting, something like a large RC motor into a motorcycle gearbox? Could show some promise. THIS - https://endless-sphere.com/forums/viewtopic.php?f=12&t=65731 - was what I think it m...
by heathyoung
Oct 30 2016 10:56pm
Forum: Battery Technology
Topic: What is this current?
Replies: 3
Views: 309

Re: What is this current?

Current flow and potential difference are two different things. A current only exists when there is something bridging the potential difference (ie. your meter). You are seeing a weak current leakage current setting the case at the potential of the cathode, which you are measuring against the anode....
by heathyoung
Oct 30 2016 10:18pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Battery terminal bolt within bolt
Replies: 5
Views: 669

Re: Battery terminal bolt within bolt

Get normal bolts and find someone with a lathe to centre-drill them for you and tap perhaps?
by heathyoung
Oct 26 2016 8:01pm
Forum: Items for Sale - New
Topic: Sabvoton Sinewave Controller FOC 12-16KW $379 Programmable
Replies: 87
Views: 16840

Re: Sabvoton Sinewave Controller FOC 12-16KW $379 Programmab

Whats the maximum the 96V can take? 120V?

I think that was 150A battery and 250A Phase correct?
by heathyoung
Oct 24 2016 11:18pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Vectrix 2007 Lithium Batteries State of Charge
Replies: 26
Views: 2848

Re: Vectrix 2007 Lithium Batteries State of Charge

Red LED is one I installed above the cycle analyst. It usually lights on acceleration (due to battery sag).

The battery gauge is only a voltmeter, ignore it. Use the cycle analyst.
by heathyoung
Oct 24 2016 10:26pm
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1713
Views: 174958

Re: Lebowski's motor controller IC, schematic & setup, new v

The 600A rated one might though - biggest problem is getting rid of 600A X 2V of heat!

I just clicked on your high power controller link - the topology was exactly what I had in mind last night (reconsidering the IPM modules due to cost) including the 'power ring' capacitor! Damn... That's crazy.