Search found 153 matches

by peskanov
Sat, 26 Mar 2016, 03:12
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24217

Junkyard motors parade

Good news: the motor seems to keep cool enough with the original fan (at modest speeds). We will see if it still works that way in summer. And now the bad news; I dismissed that old "don't" on EV conversions: I bought the batteries to soon. One of them died the fist year (these are very low quality ...
by peskanov
Tue, 22 Mar 2016, 14:30
Forum: Technical and conversion discussion
Topic: Some "don'ts" for EV building
Replies: 60
Views: 11531

Some "don'ts" for EV building

Hi evric, yes, I know some FWD cars are easier. That's the meaning what I tried to convey in my summary, but my English is lacking. My counsel for a newbie is to check the halfshafts in FWD cars or just go for a RWD conversion. In my case, being in Spain (where there is no culture of car modificatio...
by peskanov
Tue, 22 Mar 2016, 14:22
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24217

Junkyard motors parade

I will upload some pics of the conversion (hopefully soon), so everybody will see the kind of hacks we made in this conversion. Hacks is the precise word, for many of them :D Thanks to one of those "hacks", we fitted the motor with original fan and housing, plus an encoder protruding a few cms out o...
by peskanov
Tue, 22 Mar 2016, 12:46
Forum: Technical and conversion discussion
Topic: Some "don'ts" for EV building
Replies: 60
Views: 11531

Some "don'ts" for EV building

Don't convert a FWD car if you are a newbie to mechanics This is common knowledge in the EV world; RWD conversion are much easier. The problem lies in the halfshafts. Usually, one of them exits the differential and goes directly to the wheel. But the other one is often split into parts that require...
by peskanov
Tue, 22 Mar 2016, 12:21
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24217

Junkyard motors parade

Thanks Johny! I think this is one of those lessons, get sure you have enough cooling before every component is in place. Now it will be hell to access the motor.

In fact, I think I should contribute to the thread "Some don't for EV building". I have a lot of them, I commited so many errors! :D
by peskanov
Sun, 20 Mar 2016, 10:47
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24217

Junkyard motors parade

Thanks a lot Weber; I will be posting some observations the next few weeks, after doing a few runs.

My feeling is the motor will need forced ventilation. The motor wires were already warm in our few tests (runing on WYE config).
by peskanov
Sun, 20 Mar 2016, 02:15
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24217

Junkyard motors parade

It's alive! https://youtu.be/zN_xl9S_WcU http://forums.aeva.asn.au/uploads/2344/cougar_lives.jpg Jesus, doing a modern car conversion (without money and/or extensive mechanics knowledge) is a real challenge. I don't regret it, as I learned a lot about cars and mechanics in the process. However, I do...
by peskanov
Thu, 01 May 2014, 09:34
Forum: Electric motors and controllers
Topic: ABB reluctante motor
Replies: 57
Views: 7180

ABB reluctante motor

Oops, now I see I forgot to link the new ABB catalogue: http://www05.abb.com/global/scot/scot201.nsf/veritydisplay/6221f62b43e3b136c1257c2a0022a479/$file/EN_SynRM_drive_package_for_machine%20buiders_RevD.pdf Also, I found today a nice presentation about SRM. It's introductory, but contains lots of r...
by peskanov
Thu, 01 May 2014, 03:02
Forum: Electric motors and controllers
Topic: ABB reluctante motor
Replies: 57
Views: 7180

ABB reluctante motor

Richo, agreed. I specially like what those motors offer for light vehicles; ACIM is so innefficient in small frames. Could be a good option for motorcycles, karts, quads, quadricycles etc... BTW, a friend of mine is talking with ABB. The rep. showed him some laminations from the rotor, it seems thes...
by peskanov
Thu, 01 May 2014, 00:57
Forum: Electric motors and controllers
Topic: ABB reluctante motor
Replies: 57
Views: 7180

ABB reluctante motor

Johny, if you are restricted to an existing drivetrain, sure, I agree. However, I think it would be a competitive motor using an extra reductor, as power rules over torque. For direct drive without any extra gearing you need either a torque monster or strongly overdriving an small ACIM motor (ineffc...
by peskanov
Wed, 30 Apr 2014, 13:47
Forum: Electric motors and controllers
Topic: ABB reluctante motor
Replies: 57
Views: 7180

ABB reluctante motor

Richo, the 160 frames are all iron. They have split the motors into 2 families, "industrial" and "for machine builders". Industrial start at frame 160, iron. The smaller ones ("machine builders") are all aluminium. Maybe these are more expensive. I used the 2 pole as reference, as the seem to offer ...
by peskanov
Tue, 29 Apr 2014, 03:06
Forum: Electric motors and controllers
Topic: ABB reluctante motor
Replies: 57
Views: 7180

ABB reluctante motor

Johnny,
Peak torque seems pretty close to industrial induction motors having same size/weight. But is clearly lower than the best ones.
However, driving an induction motor over nominal torque seems to be quite inefficient.

For a medium sized car, this motor looks like a winner to me.
by peskanov
Sat, 26 Apr 2014, 10:50
Forum: Electric motors and controllers
Topic: ABB reluctante motor
Replies: 57
Views: 7180

ABB reluctante motor

Some news on ABB synchronous reluctance motors. They are selling now the small frame models, an these look quite interesting: http://www.abb.es/product/us/9AAC171953.aspx?country=GB Some highlights: There are 2 classes, insulation B and F. I guess B class is cheaper, but I still have no prices. Clas...
by peskanov
Mon, 17 Feb 2014, 12:50
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24217

Junkyard motors parade

Thanks; yes, that was my reasoning. A heavy car should be better built for a heavy pack, provided I remove as much weight as possible (AC included). I am stuffing about 450 KG there (lead acid pack, +60 KG motor, +Curtis). I have to remove a lot of weight from the car. http://forums.aeva.asn.au/smil...
by peskanov
Sat, 15 Feb 2014, 08:00
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24217

Junkyard motors parade

Hi there, my donor car it's ready! It's junkyard material, a Ford/Mercury Cougar with ~200.000km (13 years). I paid about 700E (about 1000 ausd), not a bad price in my country. https://lh5.googleusercontent.com/-Tvdsr0-4R14/Uv460BqHHDI/AAAAAAAAAe0/k8zwpOMa-yU/w800-h448-no/cougar_front.jpg . Not the ...
by peskanov
Sat, 25 Jan 2014, 01:00
Forum: Electric motors and controllers
Topic: New open source AC controller available
Replies: 5
Views: 4682

New open source AC controller available

Well, he has been driving his car recently. I guess it's not so terrible. Anyway, I have experienced the difference between constant V/f and FOC control in my Quad. Constant V/f was ok in the road but very poor at low speeds; I guess it's better with gearing (we have direct transmission). I am prett...
by peskanov
Fri, 24 Jan 2014, 09:19
Forum: Electric motors and controllers
Topic: New open source AC controller available
Replies: 5
Views: 4682

New open source AC controller available

Hi, I am posting this because I think it's really great news: A cheap 500V, 300A controller for AC! It's not DTC or FOC, but I bet this will be available soon. Here it is: http://johanneshuebner.com/quickcms/index.html%3Fen_products,18.html Development was/is discussed in this thread: http://www.diy...
by peskanov
Fri, 17 Jan 2014, 10:09
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24217

Junkyard motors parade

Ok then, both connected to the chassis. Thanks Weber! Johny, I am still looking at the requirements. It seems Spanish law require a project signed by an engineer, and an responsible authorized workshop. I am still not sure if there is an inspection at the end of the process. In Spain there is no EV ...
by peskanov
Thu, 16 Jan 2014, 01:15
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24217

Junkyard motors parade

Hi Johny, this contactor looks good and has a decent price. But maybe I should check for a higher Amps one, maybe in a few years I will get a bigger controller. I checked the conectivity of the Curtis. The cooling fin seems to be well insulated from all 5 terminals (B+,B-,U,V,W). I can insulate the ...
by peskanov
Tue, 14 Jan 2014, 03:33
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24217

Junkyard motors parade

Hi there, time for some updates. Bad news first: I lost access to the dyno, and that was before I got skilled enough to get good results. Unfortunately, Sport Devices SL restructured and the dyno was moved to other place. Anyway, here is a summary of what I learned. Problems, glitches, enigmas: - Co...
by peskanov
Sat, 05 Oct 2013, 12:55
Forum: Members Machines
Topic: Weber and Coulomb's MX-5
Replies: 1698
Views: 343289

Weber and Coulomb's MX-5

Congratulations! I am sure this car was well worth the effort. Your conversion is certainly awesome, especially the BMS part. In a few months I will have to legalise my project car in Spain, a country with close to zero experience in EV conversions. I am sure is going to be a long ride http://forums...
by peskanov
Thu, 26 Sep 2013, 05:27
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24217

Junkyard motors parade

Vectrix150V, no, I didn't take any note about previous values. Autotune should not change many parameters; I think it changes slip gain, a few field weakening related values, and encoder settings Slip gain moved to ~2, and it seems original value is <1. It didn't change any FW value (these are disab...
by peskanov
Wed, 25 Sep 2013, 14:07
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24217

Junkyard motors parade

BigMouse, here you have an small video of the dyno running! We are still setting things, so no results yet (btw, I fixed the voltage limit problem thanks to the advice posted in Ivan's garage). http://www.youtube.com/watch?v=8-bEra5qP3A The guys of Sport Devices SL, owners of the dyno (we are collab...
by peskanov
Mon, 23 Sep 2013, 00:55
Forum: Electric motors and controllers
Topic: Junkyard motors parade
Replies: 130
Views: 24217

Junkyard motors parade

Dyno time! I bought a set of batteries a few days ago, the AGM ones. I am pretty sure they are not adequate for an EV, but having AGM for the price of flooded made them too good to resist http://forums.aeva.asn.au/smileys/smiley4.gif . Well, I hope they will last for 2 years and will give me time to...
by peskanov
Wed, 11 Sep 2013, 08:03
Forum: Electric motors and controllers
Topic: ABB reluctante motor
Replies: 57
Views: 7180

ABB reluctante motor

Nice info. Now I wonder what "only for increasing torque" means...Low torque at low revs, maybe? I know there are motors specially suited for pumps/fans, but I ignore which specific problems these motors could have in a traction application. Meanwhile, it seems than GM shows some confidence in his r...