Search found 3731 matches

by Richo
Thu, 31 Oct 2019, 12:29
Forum: Renewable Energy and Storage (Non-EV)
Topic: Storing energy
Replies: 13
Views: 382

Re: Storing energy

brunohill wrote:
Wed, 30 Oct 2019, 00:28
I just wish I had the water.
Well it can be anything.
I suggest someone find a way to utilise dirt.

https://www.youtube.com/watch?v=itbwXMMkBQw
by Richo
Thu, 31 Oct 2019, 12:25
Forum: Renewable Energy and Storage (Non-EV)
Topic: Storing energy
Replies: 13
Views: 382

Re: Storing energy

Richo wrote:
Wed, 30 Oct 2019, 12:40
In an ideal world I'd use a gazillion MLCC caps.
Just for amusement I checked on the current cost.
My estimate would be $15M per kWh.
by Richo
Wed, 30 Oct 2019, 13:04
Forum: Renewable Energy and Storage (Non-EV)
Topic: Storing energy
Replies: 13
Views: 382

Re: Storing energy

Compressed air...
by Richo
Wed, 30 Oct 2019, 12:54
Forum: Electric motors and controllers
Topic: Grounding shielding around motor cable
Replies: 5
Views: 249

Re: Grounding shielding around motor cable

Power wires or signal wires?

Metal gland.
Usually this is done at the source (motor controller).
You really should check that they have no continuity to any of the wires.
Otherwise you could earth your ground...
by Richo
Wed, 30 Oct 2019, 12:40
Forum: Renewable Energy and Storage (Non-EV)
Topic: Storing energy
Replies: 13
Views: 382

Re: Storing energy

Anyone have other ideas that could be used to store energy for use after the sun goes down? Well I believe they have all been done before. Electrostatic, Electrochemical, Moving stuff, pumping stuff, heating, cooling... All have their advantages and disadvantages. Its pretty hard to beat regular ba...
by Richo
Tue, 29 Oct 2019, 12:25
Forum: Technical and conversion discussion
Topic: tractor conversion
Replies: 12
Views: 404

Re: tractor conversion

I did scan over the kelly manual yesterday and I was under the assumption it is required.
Someone must have already done it - its a case of finding it.
When I have more time...
by Richo
Mon, 28 Oct 2019, 13:02
Forum: Technical and conversion discussion
Topic: tractor conversion
Replies: 12
Views: 404

Re: tractor conversion

A curtis controller might work too:
1234SE-452X
1234SE-562X
But I expect they'll be harder to get and cost more.
by Richo
Mon, 28 Oct 2019, 12:52
Forum: Technical and conversion discussion
Topic: tractor conversion
Replies: 12
Views: 404

Re: tractor conversion

Please don't buy this it's only an example
https://www.aliexpress.com/item/893080068.html
by Richo
Mon, 28 Oct 2019, 12:48
Forum: Technical and conversion discussion
Topic: tractor conversion
Replies: 12
Views: 404

Re: tractor conversion

As I understand I need to add an encoder to the motor, where can i get one that would work with let's say Kelly KAC-8080I An encoder is only needed it you want fine torque control. The Kelly controllers do seem to be the cheapest option for an Induction motor. KAC72601-8080I USD$700 KAC72701-8080I ...
by Richo
Mon, 28 Oct 2019, 12:32
Forum: Members Machines
Topic: Brendon_m Moke
Replies: 159
Views: 12005

Re: Brendon_m Moke

So 33kW driving at 100kph.
It does sound high.
by Richo
Mon, 28 Oct 2019, 12:25
Forum: Nissan
Topic: Nissan Ariya
Replies: 12
Views: 532

Re: Nissan Ariya

And the HPV air records using <1000W at over 40kph equates to 1/6 the energy used by an electric car.
Stop driving - start flying :lol:
by Richo
Thu, 24 Oct 2019, 12:53
Forum: Technical and conversion discussion
Topic: tractor conversion
Replies: 12
Views: 404

Re: tractor conversion

Possible alternatives for Magnet motor:
ME1302
ME1616
ME1507
by Richo
Thu, 24 Oct 2019, 12:50
Forum: Technical and conversion discussion
Topic: tractor conversion
Replies: 12
Views: 404

Re: tractor conversion

Possible alternatives are a series DC motor:
A00-4009
203-06-4001
ME1002
by Richo
Thu, 24 Oct 2019, 12:35
Forum: Technical and conversion discussion
Topic: tractor conversion
Replies: 12
Views: 404

Re: tractor conversion

...rewind industrial 4 pole 400 V AC motor 7.5 kWh to 22V . Although the specifications match your tractor I'm skeptical that someone would rewind it to 22Vac. When you think about 400Vac/22Vac this is 18:1. I'd think this would mean you'd only have 3 or 4 conductors per slot. Or many in parallel. ...
by Richo
Tue, 22 Oct 2019, 12:49
Forum: General EV Discussion
Topic: 4kVA Inverter for 230VAC off a 350VDC battery?
Replies: 11
Views: 490

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
Tue, 22 Oct 2019, 12:43
Forum: Electric motors and controllers
Topic: AC electric motor rewinding for EV use
Replies: 100
Views: 22494

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
Tue, 22 Oct 2019, 12:40
Forum: Electric motors and controllers
Topic: AC electric motor rewinding for EV use
Replies: 100
Views: 22494

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
Tue, 22 Oct 2019, 12:38
Forum: Electric motors and controllers
Topic: AC electric motor rewinding for EV use
Replies: 100
Views: 22494

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: 4828

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: 4828

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: 4828

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: 4828

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: 170

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: 334

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: 71
Views: 3798

Re: Soyachips’ Electric FZR250

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

Image