Search found 295 matches

by Stiive
Tue, 28 May 2013, 22:38
Forum: Members Machines
Topic: The mauswerkz 300zx EV build
Replies: 43
Views: 6861

The mauswerkz 300zx EV build

Also, you might want to look at this guy from Qld's 300zx conversion.
http://300zxev.blogspot.com.au/


He has updated the blog in over 2 years though - I wonder if he ever completed it
by Stiive
Tue, 28 May 2013, 18:55
Forum: Members Machines
Topic: The mauswerkz 300zx EV build
Replies: 43
Views: 6861

The mauswerkz 300zx EV build

There's probably a laser scanner somewhere at the uni. I'd be more inclined to use the 3D cooridinate measuring "ROMER" arm though. Supposedly it's good to 10um. If you can get a robot into your engine bay :P Found this 3d scanner http://www.nextengine.com/products/scanner/features/accurate 0.005" ...
by Stiive
Tue, 28 May 2013, 18:46
Forum: Members Machines
Topic: The mauswerkz 300zx EV build
Replies: 43
Views: 6861

The mauswerkz 300zx EV build

BigMouse wrote:
Stiive wrote:When it DOES work, it's accurate to maybe 5-10mm (at 2-3m distance). I found some accuracy data for it a while back.


Wow, okay that accuracy sucks. Maybe your Uni has a proper one then; we do.
Its certainly much more accurate than that.
by Stiive
Tue, 28 May 2013, 14:32
Forum: Members Machines
Topic: The mauswerkz 300zx EV build
Replies: 43
Views: 6861

The mauswerkz 300zx EV build

I just sold my 300zx about a month ago :( Loved that car. I actually bought it about 4 years ago planning to do a conversion when the engine gave any sign of trouble (bought it cheap with no service history) - but obviously didn't factor in it being a Nissan as it never ended up missing a beat! 'Tha...
by Stiive
Fri, 24 May 2013, 00:29
Forum: Batteries, charging, management and monitoring
Topic: Lithium-ion battery breakthrough for Aussie resea
Replies: 8
Views: 1404

Lithium-ion battery breakthrough for Aussie resea

1860mAh/g (milli-Amp hours per gram), compared to 300 and 400 mAh/g for conventional graphite based anodes So 10Ah battery would be 5.3g? A 10Ah headway cell is ~350g They say they were improving it 5 times not 50 times. So something doesn't add up. Is comparing anode to anode a useful measure of b...
by Stiive
Sun, 19 May 2013, 03:57
Forum: Members Machines
Topic: Voltron-Evo; jonescg's new electric race bike
Replies: 291
Views: 46170

Voltron-Evo; jonescg's new electric race bike

Nice one... subscribed :)
by Stiive
Sat, 18 May 2013, 18:01
Forum: Electric motors and controllers
Topic: Siemens 1PV5138-4WS24
Replies: 43
Views: 6270

Siemens 1PV5138-4WS24

But the higher the voltage the more likely the insulation will break down in the motor or other parts in the system. I dont think so... The mag wire insulation should be good for well over 1,000V. The 5135-4WS14 passes a megger test at 2.5kV The point will be there are cheaper ways to get power rat...
by Stiive
Fri, 17 May 2013, 23:46
Forum: Members Machines
Topic: ELMOFO Electric Radical SR8
Replies: 44
Views: 6221

ELMOFO Electric Radical SR8

The whole case is CNC machined billet aluminum. They are not cast and not welded. I couldn't buy battery modules (of an acceptable weight) capable of continuously delivering the required current without overheating, so I teamed up with an ex-Cosworth engineer and designed and built some that could....
by Stiive
Fri, 17 May 2013, 23:37
Forum: Electric motors and controllers
Topic: Siemens 1PV5138-4WS24
Replies: 43
Views: 6270

Siemens 1PV5138-4WS24

I feel like I'm hijacking this thread. Maybe I should make a build thread for my car. No, this isn't a hijack because if there is no draw back from over voltaging the 5135 to 600V, why would OP bother spending double the amount of money on the 5138? I've always wondered how much you can over-voltag...
by Stiive
Fri, 17 May 2013, 22:53
Forum: Members Machines
Topic: ELMOFO Electric Radical SR8
Replies: 44
Views: 6221

ELMOFO Electric Radical SR8

Those battery enclosures look very expensive. The side plates look machined, but what about the top orange bits? Is the system water cooled/heated or something? Why the need for such precision? I guess if your gonna spend tens of thousands on batteries, might as well spend thousands protecting them....
by Stiive
Fri, 17 May 2013, 21:44
Forum: Electric motors and controllers
Topic: Siemens 1PV5138-4WS24
Replies: 43
Views: 6270

Siemens 1PV5138-4WS24

if you double the speed at which torque starts to drop (lower voltage motor) you effectively double the current at lower speeds. There must be some point where the copper becomes a fuse. Sorry I don't follow what you mean? The winding remains identical. I'm still applying just 300V at 3,200RPM.
by Stiive
Fri, 17 May 2013, 21:06
Forum: Electric motors and controllers
Topic: Siemens 1PV5138-4WS24
Replies: 43
Views: 6270

Siemens 1PV5138-4WS24

whats to stop you from running the 1PV5135 @ 650V like the 1PV5138 and producing 200kW+? Ah it'll be the bearings and balance. If you can get 10krpm@300V@100kW then 20krpm@600V@200kW isn't realistic. Doubling the current will just overheat it quicker. I still haven't seen any high speed bearings fo...
by Stiive
Fri, 17 May 2013, 17:45
Forum: Electric motors and controllers
Topic: Siemens 1PV5138-4WS24
Replies: 43
Views: 6270

Siemens 1PV5138-4WS24

250Nm at 7800rpm is ~200kw. My 48vac wound 4 pole 132 frame motor should be capable of (at least approaching) that. Some water cooling might be required, but I'll do everything I can to get it there. A 364v battery pack supplying a 48vac motor should allow constant V/F up to 265Hz with peak battery...
by Stiive
Fri, 17 May 2013, 14:20
Forum: Electric motors and controllers
Topic: Siemens 1PV5138-4WS24
Replies: 43
Views: 6270

Siemens 1PV5138-4WS24

The motor is rated at 300VDC max. You can get 10k RPM at full power with sag at that voltage http://forums.aeva.asn.au/smileys/smiley2.gif It's torque I'm interested in. Also, I never understood why they give an ACIM a DC voltage rating. That tells me nothing. Give me an AC voltage and a base frequ...
by Stiive
Fri, 17 May 2013, 03:48
Forum: Electric motors and controllers
Topic: Siemens 1PV5138-4WS24
Replies: 43
Views: 6270

Siemens 1PV5138-4WS24

No idea... I'm thinking of selling one of mine though because I'm using my servo motor as a dyno. PM if your interested Don't really need one at the moment. I was just curious. A motor rated to 10,000rpm is very tempting, but I'd never get there on the voltage I'm going to be running (360vdc), at l...
by Stiive
Thu, 16 May 2013, 22:43
Forum: Electric motors and controllers
Topic: Siemens 1PV5138-4WS24
Replies: 43
Views: 6270

Siemens 1PV5138-4WS24

I'd go with the 1PV5135 at half the cost... Not only would you save money on the motor, but also on the controller + auxiliary equip such as DC/DC converters. What's the latest source for these anyway? No idea... I'm thinking of selling one of mine though because I'm using my servo motor as a dyno....
by Stiive
Thu, 16 May 2013, 20:52
Forum: Electric motors and controllers
Topic: Siemens 1PV5138-4WS24
Replies: 43
Views: 6270

Siemens 1PV5138-4WS24

There are a couple of the 1PV5138-4WS24 motors on ebay currently asking for $5000 USD each for a new motor. Taking into consideration just the asking price for these motors, would people here think that is a good price, or even too good of a price (ie. be wary)? I'd go with the 1PV5135 at half the ...
by Stiive
Tue, 14 May 2013, 18:54
Forum: Electric motors and controllers
Topic: Siemens 1PV5138-4WS24
Replies: 43
Views: 6270

Siemens 1PV5138-4WS24

Stiive wrote:
TooQik wrote: I always seem to end up with a high voltage AC as my prefered motor.


Worth noting the 1PV5135 motor is only rated for 300VDC


oops you are referring to 1PV5138. Maybe try a 5135 :P
by Stiive
Tue, 14 May 2013, 18:52
Forum: Electric motors and controllers
Topic: Siemens 1PV5138-4WS24
Replies: 43
Views: 6270

Siemens 1PV5138-4WS24

TooQik wrote: I always seem to end up with a high voltage AC as my prefered motor.


Worth noting the 1PV5135 motor is only rated for 300VDC
by Stiive
Mon, 13 May 2013, 02:08
Forum: Electric motors and controllers
Topic: AC electric motor rewinding for EV use
Replies: 94
Views: 21128

AC electric motor rewinding for EV use

Canberra32 wrote: Perhaps the question I should have asked is who do I send it to to make it EV ready? :)


We got our SAE motor rewound at Genertech in Victoria - cost a few thousand $ tho.
There should be similar shops all around Australia.
by Stiive
Thu, 09 May 2013, 03:32
Forum: Electric motors and controllers
Topic: AC electric motor rewinding for EV use
Replies: 94
Views: 21128

AC electric motor rewinding for EV use

Stiive, is it possible to determine rotor time constant for FOC using a locked rotor and adjusting the time constant in software until maximum torque is produced? Hmm I guess that could work trial and error is normally the best way. The normal/industry method is to do locked rotor test. Rotor resis...
by Stiive
Wed, 08 May 2013, 21:56
Forum: Electric motors and controllers
Topic: AC electric motor rewinding for EV use
Replies: 94
Views: 21128

AC electric motor rewinding for EV use

Mouse, your motor should look like this: http://i168.photobucket.com/albums/u200/mizlplix/001a9f1a.jpg It is wound for around 50 volts and has one turn in each pole and lots of parallel wires so it can handle 300 amps cont. and 650 intermittent. Miz You've done a nice job there Miz, looks very clea...
by Stiive
Wed, 08 May 2013, 13:48
Forum: Electric motors and controllers
Topic: AC electric motor rewinding for EV use
Replies: 94
Views: 21128

AC electric motor rewinding for EV use

Maybe 300Nm is a tad optimistic? TBH, I'd say so. The Siemens 1PV5135 is [EDIT; 200Nm. 300Nm for 30secs] and that's designed for high torque EV application + its water cooled. It doesn't say what the nominal speed/voltage is, so cant really comment on the comparison of the winding, however its rate...
by Stiive
Wed, 08 May 2013, 13:28
Forum: Electric motors and controllers
Topic: AC electric motor rewinding for EV use
Replies: 94
Views: 21128

AC electric motor rewinding for EV use

I have a 4 pole 132 frame motor wound for 48vac delta. with ~constant torque (up to 300Nm?) to ~7500rpm on my ~400v battery. Is this 48vac @ utility line freq RPM? e.g ~1500rpm for 4pole. Or 48vac @ nominal speed (sounds like 7,500RPM)? Sounds like line freq and then over speeded/voltaged to 7500RP...