Search found 3692 matches

by Richo
Yesterday, 12:49
Forum: General EV Discussion
Topic: 4kVA Inverter for 230VAC off a 350VDC battery?
Replies: 11
Views: 139

Re: 4kVA Inverter for 230VAC off a 350VDC battery?

Sorry why couldn't an industrial motor controller/inverter be used?
couldn't one be be tricked into outputting 240Vac 50Hz.
by Richo
Yesterday, 12:43
Forum: Electric motors and controllers
Topic: AC electric motor rewinding for EV use
Replies: 99
Views: 21411

Re: AC electric motor rewinding for EV use

You are better off starting a new thread and say:
"I want to convert this"
[insert picture]
"I want it to do this...blah blah blah"
"what do you suggest".
by Richo
Yesterday, 12:40
Forum: Electric motors and controllers
Topic: AC electric motor rewinding for EV use
Replies: 99
Views: 21411

Re: AC electric motor rewinding for EV use

At those power levels and RPM and voltage you are bettor off with an etek motor(DC magnet motor) or mars motor (AC magnet motor).
by Richo
Yesterday, 12:38
Forum: Electric motors and controllers
Topic: AC electric motor rewinding for EV use
Replies: 99
Views: 21411

Re: AC electric motor rewinding for EV use

48V is pretty low.

So
50Hz-1500RPM 7.5kW nominal 18-22kW peak
75Hz-2250RPM 11.2kW nominal 28-33kW peak
It would have to be rewound to 22Vac.
Very unlikely.
by Richo
Mon, 21 Oct 2019, 19:38
Forum: Batteries, charging, management and monitoring
Topic: Testing a traction pack before using
Replies: 22
Views: 1725

Re: Testing a traction pack before using

jonescg wrote:
Wed, 16 Oct 2019, 13:27
universal motors are happy on DC too, they just spin slower.
Except the ones with SCR controllers...
by Richo
Mon, 21 Oct 2019, 19:35
Forum: Batteries, charging, management and monitoring
Topic: Testing a traction pack before using
Replies: 22
Views: 1725

Re: Testing a traction pack before using

Alternatively you can be confident in your work, assume its all good, and not test it.
Then you only waste time and money if it isn't :|
by Richo
Mon, 21 Oct 2019, 19:25
Forum: Batteries, charging, management and monitoring
Topic: Testing a traction pack before using
Replies: 22
Views: 1725

Re: Testing a traction pack before using

...one ends up getting much more voltage and power than the others and blows I tested 10 x Halgoen globes 35V 12V. In the cold state they are within +/-1% In the hot state they are within +/-1% Perhaps the tolerance on mains voltage incandescence globes is more relaxed. In this case I think running...
by Richo
Mon, 21 Oct 2019, 18:47
Forum: Batteries, charging, management and monitoring
Topic: Testing a traction pack before using
Replies: 22
Views: 1725

Re: Testing a traction pack before using

antiscab wrote:
Fri, 18 Oct 2019, 13:41
Their resistance changes with temperature
Mmmm I tested the ones I have here.
They changed +1.6%

So 8 in series run at 90V would go from 246W cold to 242W hot.
I'm in the opinion that this is not significant enough to concern a load test.
by Richo
Mon, 21 Oct 2019, 13:04
Forum: Admin Notices
Topic: Quoting pictures
Replies: 0
Views: 40

Quoting pictures

When quoting someone that includes a picture the actual image location isn't copied over in the quote.
I have to go back to the original post copy image location and paste it back into the quote.
by Richo
Mon, 21 Oct 2019, 13:02
Forum: Admin Notices
Topic: Known to the last minute
Replies: 5
Views: 74

Known to the last minute

I notice that the Joined date on the right shows the hour and minute.
Isn't the just date good enough?

Reminds me of when I purchase electronic parts for $100+ dollars to the 4th decimal place.
by Richo
Mon, 21 Oct 2019, 12:54
Forum: Members Machines
Topic: Soyachips’ Electric FZR250
Replies: 68
Views: 2506

Re: Soyachips’ Electric FZR250

Squze my ignorance - what is this for?
Do the washers go on later?

Image
by Richo
Mon, 21 Oct 2019, 12:48
Forum: Vectrix
Topic: Vectrix acceleration and throttle problem.
Replies: 8
Views: 133

Re: Vectrix acceleration and throttle problem.

wovenrovings wrote:
Thu, 17 Oct 2019, 17:31
I would be accelerating and suddenly acceleration would become regen and vise versa.
There are 2 are things that could cause this:
1. The brake is coming on - check the brake switche(s) and the wiring to the controller.
2. The hall sensor/wires in the throttle is damaged
by Richo
Mon, 21 Oct 2019, 12:28
Forum: General EV Discussion
Topic: 4kVA Inverter for 230VAC off a 350VDC battery?
Replies: 11
Views: 139

Re: 4kVA Inverter for 230VAC off a 350VDC battery?

You'd also loose the isolation as that is done going from 12V-400V prior to the DC bus.
by Richo
Fri, 18 Oct 2019, 12:50
Forum: Batteries, charging, management and monitoring
Topic: Testing a traction pack before using
Replies: 22
Views: 1725

Re: Testing a traction pack before using

Don't forget at 90Vdc a 2400W mains heater only is 300-350W.
So you'd need a few...

For $10 you get 10 x Halogen globes 12V 35W from bunnykings.
8 in series will be ~250W.
$20 - 500W
$40 - 1250W
On plus side you'll brighten everyone's day
by Richo
Fri, 18 Oct 2019, 12:36
Forum: Vectrix
Topic: Vectrix acceleration and throttle problem.
Replies: 8
Views: 133

Re: Vectrix acceleration and throttle problem.

antiscab wrote:
Thu, 17 Oct 2019, 22:24
...you have to simultaneously hold the throttle at full, have the left brake on and turn the ignition on.
So three hands...

Go engineering :lol:

Image
by Richo
Fri, 18 Oct 2019, 12:30
Forum: EV Motoring
Topic: The Aptera is back
Replies: 26
Views: 389

Re: The Aptera is back

Damn - Gonna have to change my name now :oops: I blame my parents :lol: What gets me its that the Aptera was a dead product. But someone had enough passion to bring it back :?: I''m not too sure if upgrading to the lastest lithium batteries and putting a panel is going to stop it dying again. Giving...
by Richo
Thu, 17 Oct 2019, 12:56
Forum: EV Motoring
Topic: The Aptera is back
Replies: 26
Views: 389

Re: The Aptera is back

coulomb wrote:
Tue, 15 Oct 2019, 19:59
It's certainly hard to ignore them.
Sure - especially when they are glued to the middle of the road. :lol:
by Richo
Thu, 17 Oct 2019, 12:48
Forum: EV Motoring
Topic: The Aptera is back
Replies: 26
Views: 389

Re: The Aptera is back

bladecar wrote:
Wed, 16 Oct 2019, 17:41
So, how's the Handi Sports going.
Well since you ask its nearly done!
Everything I custom built here in WA - motor and all :o

I guess if I imported an off the shelf motor controller and motor it'd be finished a long time ago - but I'd probably be out of business. ;)
by Richo
Thu, 17 Oct 2019, 12:30
Forum: Members Machines
Topic: Brendon_m Moke
Replies: 154
Views: 10699

Re: Brendon_m Moke

Its missing the flexible conduit glands.

But its awesome anyway 8-)
by Richo
Thu, 17 Oct 2019, 12:27
Forum: Vectrix
Topic: Welp, ran out of charge for the first time
Replies: 13
Views: 236

Re: Welp, ran out of charge for the first time

I ran out of fuel ON the road but had enough speed to roll into the servo.
Rolled up to the pump only to find out the servo was closed.
Then another person pulled in, on the other side of the pump, put the pump nozzle into their car and stood there looking more stupid than me.
"ah the servo is closed"
by Richo
Wed, 16 Oct 2019, 13:03
Forum: Batteries, charging, management and monitoring
Topic: Testing a traction pack before using
Replies: 22
Views: 1725

Re: Testing a traction pack before using

I've used both.
Water and electronics don't mix so I prefer the light bulbs.
Everybody's pack is different so each setup is different.
by Richo
Wed, 16 Oct 2019, 12:59
Forum: Members Machines
Topic: Soyachips’ Electric FZR250
Replies: 68
Views: 2506

Re: Soyachips’ Electric FZR250

I actually ordered this one from AliExpress https://www.aliexpress.com/item/32888136080.html?spm=a2g0s.9042311.0.0.2e724c4dH6UCry Yeah I did see those. But at 12V the battery will always be "flat". The nominal 20-80% is 3.2V so 3.0V will be in the last 20% of the cell capacity. It also has no curre...
by Richo
Wed, 16 Oct 2019, 12:51
Forum: Members Machines
Topic: Soyachips’ Electric FZR250
Replies: 68
Views: 2506

Re: Soyachips’ Electric FZR250

...traction pack doesn't fit into the universal input AC supplies. ...can you explain what this means? Sure. Most universal power supplies are say 90Vac-270Vac. BUT they can accept DC as well. So this would mean 127Vdc-382Vdc. People who have converted a car and have 144Vdc can use off the shelf po...
by Richo
Wed, 16 Oct 2019, 12:36
Forum: EV Motoring
Topic: The Aptera is back
Replies: 26
Views: 389

Re: The Aptera is back

We must sell the csiro hydrogen product with determination, and be a real Government, and not a pussy Government, as many, mostly liberal Governments, tend to be. Ah so the CSIRO "were" working on ammonia as the primary export. Its only since the eV manufacturers got their pocket books out and star...
by Richo
Tue, 15 Oct 2019, 18:20
Forum: Members Machines
Topic: Soyachips’ Electric FZR250
Replies: 68
Views: 2506

Re: Soyachips’ Electric FZR250

Mmm that would do most of it. It's not quite specific under heavy load. eg the "12V" battery is flat and could take an 8A charge. Add on the headlights and brake lights and you have a 16A draw. Normally works within 150% rated power for more than 3 seconds and then constant current protection 105-13...