Search found 265 matches

by HeadsUp
Mon, 12 Apr 2010, 20:08
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 56721

Nevilleh's BMW

I don't know where the thermistor was mounted originally as they have not fitted one. There is a 2-pin header marked on the overlay at the end of the board and it just has a 50K resistor soldered in there instead. I wonder why they did away with it? . if you were to put a switch in series with that...
by HeadsUp
Mon, 12 Apr 2010, 18:56
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 56721

Nevilleh's BMW

You really shouldn't leave scorch marks (carbonised epoxy) bridging across high voltage areas. Do you have a small drill that can take a grinding type bit to grind it away, or you could maybe just drill a row of overlapping holes. It only needs a line a few mm wide cutting through the black. Maybe ...
by HeadsUp
Mon, 12 Apr 2010, 17:24
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 56721

Nevilleh's BMW

where is the temp sensor mounted ? can you have one mounted to the M- bus bar at the hottest point ( probably where 3 IGBTs are clustered ) using that one to limit current output above a threshold limit , and another to a dashboard temp gauge ? what are the maximum rated temps for those ? note also ...
by HeadsUp
Mon, 12 Apr 2010, 16:38
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 56721

Nevilleh's BMW

do you have any new photos inside showing the components and heat path ?

maybe you can tweak things to improve heat transfer / dissipation and get a controller rather than an incendiary device
by HeadsUp
Tue, 06 Apr 2010, 17:55
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 56721

Nevilleh's BMW

... I have already replaced all the semiconductors on the controller board.... http://forums.aeva.asn.au/smileys/smiley17.gif before replacing the blown semis did you put a meter over other components to check continuity and integrity ? easier to test while they have nothing connected to them in ca...
by HeadsUp
Mon, 29 Mar 2010, 18:53
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 56721

Nevilleh's BMW

what are the IGBT part numbers Nev ?

by HeadsUp
Mon, 29 Mar 2010, 18:28
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 56721

Nevilleh's BMW

what a bitchin @&%$*#^!%#@ experience

Image
by HeadsUp
Sat, 13 Mar 2010, 02:21
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 56721

Nevilleh's BMW

Michael wrote: I m useing a Curtis Controller now it have not give me any problems.
i think is the bast controller for any one to convert your car.



red smarties are always the fastest
by HeadsUp
Sat, 20 Feb 2010, 17:02
Forum: Electric motors and controllers
Topic: Changing an induction motor voltage
Replies: 433
Views: 112574

Changing an induction motor voltage

are you going to try and soften it with any solvent to loosen it up ?

what would do that without damaging the insulation on the wires ?

by HeadsUp
Wed, 17 Feb 2010, 16:11
Forum: Batteries, charging, management and monitoring
Topic: Home grown BMS ideas !
Replies: 781
Views: 112782

Home grown BMS ideas !

When I had a short foray into the poker machine industry in 1992 Aristocrat just used corrupt public servants to browbeat the opposition http://forums.aeva.asn.au/smileys/smiley19.gif Corrupt public servants in Australia? Never!! (Queensland, maybe, but wasn't he a kiwi?) imagine if you had a calcu...
by HeadsUp
Tue, 16 Feb 2010, 15:30
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 56721

Nevilleh's BMW

..... looks to me as if the copper cladding on the board gave way in a big way. Whether that was caused by a MOSFET melting I won't know until/if I get inside. The heat sinking is pretty minimal. one tiny component failure in a 4 cent part like a resistor can lead to a cascade failure in other bits...
by HeadsUp
Mon, 15 Feb 2010, 22:12
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 56721

Nevilleh's BMW


is there any components that have obvious damage , like the guts blown out of any mosfets ?

betting its on your list of things to check once you get through the grieving phase

Image
by HeadsUp
Mon, 15 Feb 2010, 20:55
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 56721

Nevilleh's BMW

oh what fun i lurve diagnostics heat dissipation has been mentioned already ( dammit ) , but i would also be investigating at the fault being related to flash between components caused by insufficient electrical insulation and insufficient conductor thickness on the PC board , more so than a failure...
by HeadsUp
Sun, 14 Feb 2010, 16:19
Forum: Members Machines
Topic: Nevilleh's BMW
Replies: 337
Views: 56721

Nevilleh's BMW


whats the controller rated at ?

photos ? - you know how people love to see war footage   Image
by HeadsUp
Sat, 16 Jan 2010, 01:33
Forum: Electric motors and controllers
Topic: 10" DC motor - Electro Dynamics
Replies: 35
Views: 7378

10" DC motor - Electro Dynamics

sorry . biggest i have here is 20 W x 28 L x 8 mm for the price of a phone call it wont hurt to compare a price from someone like Lincoln Electric or Meccalte Lincoln use brushes close to that size in 300 - 400 amp engine driven welders , if they are slightly bigger they are very soft and easy to fi...
by HeadsUp
Sat, 16 Jan 2010, 00:46
Forum: Electric motors and controllers
Topic: 10" DC motor - Electro Dynamics
Replies: 35
Views: 7378

10" DC motor - Electro Dynamics

can you tell me width , length , thickness of brushes , i will compare to what i have here
by HeadsUp
Mon, 11 Jan 2010, 23:01
Forum: Electric motors and controllers
Topic: 10" DC motor - Electro Dynamics
Replies: 35
Views: 7378

10" DC motor - Electro Dynamics

assuming its a motor

it could equally be a generator for a motor driven welder

getting a lecky to mount it up and run it under loads and try to figure out its original voltage parameters is what ya need to do
by HeadsUp
Mon, 11 Jan 2010, 22:55
Forum: Electric motors and controllers
Topic: Homopolar motor
Replies: 4
Views: 1059

Homopolar motor

lol. cute again

could be useful in heart pump technology with a dual chamber magnetic coupled pump

assuming the close proximity magnetic field didnt cause cell mutation or something.

by HeadsUp
Mon, 11 Jan 2010, 21:21
Forum: Electric motors and controllers
Topic: Homopolar motor
Replies: 4
Views: 1059

Homopolar motor

In itself there may be no theory that can be translated on to another useful product.......... but it doesnt hurt to look and contemplate navel gazing may produce nothing more than a handful of navel lint , but who knows what the missus might be able to knit with that.... http://forums.aeva.asn.au/...
by HeadsUp
Sat, 09 Jan 2010, 10:22
Forum: Electric motors and controllers
Topic: Homopolar motor
Replies: 4
Views: 1059

Homopolar motor


bit of fun , and some brain food for some of you

youtube video , homopolar motor


by HeadsUp
Wed, 30 Dec 2009, 22:49
Forum: Electric motors and controllers
Topic: Hub Motors & RTA compliance
Replies: 19
Views: 3398

Hub Motors & RTA compliance



the link is okay , its their website which is down

i agree , they showed no details or specifications .... could be another prop from the dodgy brothers Inc.


by HeadsUp
Wed, 30 Dec 2009, 04:00
Forum: Electric motors and controllers
Topic: Hub Motors & RTA compliance
Replies: 19
Views: 3398

Hub Motors & RTA compliance


wheel motor from the US " Hi-Pa Drive "

not much detail on specifications or efficiency anywhere

anutha wheel motor
by HeadsUp
Thu, 24 Dec 2009, 17:56
Forum: Electric motors and controllers
Topic: Litz wire
Replies: 4
Views: 1875

Litz wire

Bambach Wire & Cables in Sydney makes Litz. New England Wire company in the US has an excellent range of products if you need off the shelf or custom. Might have to buy 500m or so though. thanks james , i thought you may have had contact with such a product ;) cheers and merry xmas peeps
by HeadsUp
Thu, 24 Dec 2009, 14:14
Forum: Electric motors and controllers
Topic: big batteries and step up DC converters
Replies: 69
Views: 17490

big batteries and step up DC converters

some of you are already members over at Home Grown Power Forum there has been some developments there with guys getting increased power efficiencies through incorporating DC capacitors into AC circuits ( yes ) on wind turbines possibly of more interest might be the voltage doubler and tripler circui...