Search found 153 matches

by peskanov
Mon, 22 Jul 2013, 03:33
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

T2, I have the "older" model of the 1238, it will take only 500A peak and 155A continuous. I like your idea of using a 5.5kw, as they are lighter and cheaper. In fact, I have an 5.5 kw motor available. But what about efficiency and durability? Lighter motors usually have an smaller eff. factor. And ...
by peskanov
Sat, 20 Jul 2013, 02:42
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

Well, I moved the rotor to another shop which I feel is more professional. They use a commercial growler to test squirrel cages and repair all kind of strange motors. They told me they "think it's broken". They seem a bit unsure, like the first guy checking it. I guess I must move on and look for an...
by peskanov
Sat, 20 Jul 2013, 02:39
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

T2, the problem with going low voltage/high revs is that rewinding the motor is difficult. You have to know the art pretty well and unfortunately I don't. I understand that rewinding for 9000rpm with some torque available is the same than rewinding for 12VAC (using my 100VCD/70VAC controller). That ...
by peskanov
Fri, 19 Jul 2013, 07:16
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

25kw continuous is more than I need, it would suck out all the energy of the battery in half and hour http://forums.aeva.asn.au/smileys/smiley4.gif . I am not sure about 25VAC and 4000 RPM using a Curtis. It seems Ivan Bennet & friends didn't have much luck following that path. Has anybody tried tha...
by peskanov
Thu, 18 Jul 2013, 14:48
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

T2, thanks for your interest. I feel quite comfortable writing in this forum, people here is quite friendly imo. I did not found precise info about this motor; it seems it was built in 2008, but can't find a catalogue from those years. The closest spec I found in Leroy-Somer catalogues is: IEC1 Effi...
by peskanov
Thu, 18 Jul 2013, 14:10
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

jonescg, I only used soap and water in the case, I think it's better to avoid water entering the iron core. I know for a fact that ACIMs will work with water on the insides for a long time, but I don't know about the impact in the efficiency. I performed some light brushing in the internal side, did...
by peskanov
Thu, 18 Jul 2013, 02:11
Forum: Technical and conversion discussion
Topic: Ute-Camper conversion
Replies: 8
Views: 1831

Ute-Camper conversion

I am also getting 100 kwh for 300 km, but I think you could get away with half of that just limiting your amps and driving slowly, something like 50-60 kmh (I am not sure if that's possible in Australian roads, it would be in a country like Norway). These vehicles have horrible aerodynamics, if you ...
by peskanov
Thu, 18 Jul 2013, 00:43
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

T2, that's right, those inertia values means the 4 poles has a bigger diameter. Still, how much iron do they have is unknown. But torque also depends on rotor diameter, not just back iron. So I still think 4 poles should be a better bet. Richo, I have to study where the power factor comes from, as t...
by peskanov
Wed, 17 Jul 2013, 07:57
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

Comedic gold: - First repair ship: the guy test my rotor using a growler he made himself. Unfortunately he kept forgetting to plug it, an even when plugged the device was so loosely attached it was difficult to know if it was ON. : Verdict: this squirrel cage is completely broken. Quote for rewind: ...
by peskanov
Wed, 17 Jul 2013, 02:50
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

BigMouse, we threw the old insulator away. About 5 or 6 slots contain burned insulator (we still have to found a way to clean them). Anyway, even if all the insulators were OK, I plan to use higher heat resistant materials. I asked a pair of professional rewinders where do they get their supplies; i...
by peskanov
Tue, 16 Jul 2013, 13:19
Forum: Electric motors and controllers
Topic: ABB reluctante motor
Replies: 57
Views: 7338

ABB reluctante motor

Today I found this 2013 ABB catalogue (includes prices: rare). http://www05.abb.com/global/scot/scot285.nsf/veritydisplay/3600a1875a4fb8d5c125784c004ffc79/$file/Drives_motors_cat_2013.pdf Theres is a bit of info about the high performance SynRM line (page 9): "The SynRM package has a high output var...
by peskanov
Tue, 16 Jul 2013, 05:27
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

Thanks guys; I should have made some pic of our "lever" system, but I got my hands full of dirt at that point.
Richo, what's the advantage of the 230/400 rating?

Also, does anybody know why this motor has a high power factor (0.9)?
by peskanov
Mon, 15 Jul 2013, 23:40
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

Next recommended step is heating the motor in an oven and extract the windings using a lever. I improvised a platform with an 800W electric resistance and tried to insulate the motor. It didn't work, too slow and probably too many heat looses. https://lh4.googleusercontent.com/-2AHjJYMJXbQ/UeOdo7jt2...
by peskanov
Mon, 15 Jul 2013, 23:22
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

I decided to work a bit on the Leroy-somer before getting another motor. This week I will get the rotor to another shop for checking. It's probably broken, but I still have some doubts. Plus, this motor is a good oportunity to develop some skills without breaking something valuable. This weekend we ...
by peskanov
Tue, 09 Jul 2013, 05:42
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

the ABB 7.5KW, as Richo said. Should be a safe bet (if it works!). I will check again the junkyard.
by peskanov
Tue, 09 Jul 2013, 03:05
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

I have no idea, it has two of them. For external thermistors? Well, I took the rotor to the shop: broken squirrel cage. http://forums.aeva.asn.au/smileys/smiley19.gif I am a bit disappointed cause I liked the shape/color of the motor, and that it had an extra oomph for a 132 frame...also, the paint,...
by peskanov
Mon, 08 Jul 2013, 22:09
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

Hey, we didn't break the circlip! We extracted it using patience and pliers. Both the bearing and the circlip look good despite the silly hammering. http://forums.aeva.asn.au/smileys/smiley1.gif I didn't think laminations insulation could be a problem; if I understood my books correctly, the functio...
by peskanov
Mon, 08 Jul 2013, 13:26
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

Mmm...the angle grinder solution is really tempting! http://forums.aeva.asn.au/smileys/smiley4.gif Yep, I have to rewind the motor for very low voltage. My controller is a Curtis 1238, just 100VDC. My plan is to follow the steps of Ivan Bennet and rewind it myself. The stator has 48 slots, therefore...
by peskanov
Mon, 08 Jul 2013, 03:32
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

Well, after some cleaning and closer inspection I noticed the "cracks" were not cracks at all. They are production defects: https://lh4.googleusercontent.com/-YBA75XCnr_Q/UdlNd42ri7I/AAAAAAAAASU/grU-9578NGA/s640/not_cracks.jpg So no problem here. The little holes in the body of the rotor could have ...
by peskanov
Sat, 06 Jul 2013, 08:10
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

Well, after reading the 3.7 Tm/Tn spec, I couldn't resist the temptation and went for the Leroy-Somer. The guys at the shop tested it before selling it to me; it was not in working order, and the sold me it at scrap price: 60 euros (85 aud). I am not sure the motor is the one in the catalogue, as it...
by peskanov
Fri, 05 Jul 2013, 12:41
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

To be fair, "2 pole motors have more back iron" is an ambiguous sentence. More iron/kw? More iron weight in relation to copper weight? More iron for a given frame? When I check motor specs in the inverterdrive shop, the heavier ones (for a given frame) are those having 4 poles. I think that's a good...
by peskanov
Fri, 05 Jul 2013, 00:09
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

Bigmouse, logic says 4 pole motors should be heavier and have more back iron, but curiously Ivan Bennett says otherwise: http://ivanbennett.com/forum/index.php?topic=2.0 "2 pole 3450 rpm, motors are likely to have more back iron." I find it somewhat dubious, I am leaning towards 4 poles. a4x4wiki, G...
by peskanov
Thu, 04 Jul 2013, 11:28
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24449

Junkyard motors parade

Hi, it seems I can't resist the EV vice and now I am collecting items for a road legal car conversion! My target is a 1200KG car with good aerodynamics. Maybe an Opel/Vauxhall Calibra, a Toyota Celica, a Mazda or a Ford Probe. Again, my plan is a cheap conversion using a second hand Curtis and a rew...
by peskanov
Wed, 03 Jul 2013, 14:10
Forum: Technical and conversion discussion
Topic: Converting a gas Quad to AC
Replies: 95
Views: 16592

Converting a gas Quad to AC

Well, there is the option of travelling to Germany, registering as a citizen there, buying a German car, converting it, doing the paperwork there and then move it to Spain. Quite a hassle! Something similar is possible with Portugal, our neighbours, but the bureaucracy there is still learning about ...
by peskanov
Tue, 02 Jul 2013, 11:21
Forum: Technical and conversion discussion
Topic: Converting a gas Quad to AC
Replies: 95
Views: 16592

Converting a gas Quad to AC

Thanks a lot guys, your assistance was the key in order to finish this little project! I have some recent pics, after the paint job: https://lh5.googleusercontent.com/-82D-p26jIIU/UdHTnEpLDXI/AAAAAAAAAQE/UPoEDqc-Jbs/s800/outside.jpg Dashboard: we have redundant sensors a go-go! https://lh5.googleuse...