Search found 106 matches

by coleasterling
Jan 23, 2018 12:42 pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Anyway of making the R martins from china sold on Ali express road legal in U.S.
Replies: 21
Views: 318

Re: Anyway of making the R martins from china sold on Ali express road legal in U.S.

Individual states do handle registration, but highway legal status of a vehicle is determined by the feds first. After that, states can decide to be more strict, but not less so. In this case, you could get one or maybe even a few into the states and registered, but they wouldn't technically be lega...
by coleasterling
Jan 23, 2018 11:38 am
Forum: Motor Technology
Topic: Show off your lebowski controller
Replies: 31
Views: 942

Re: Show off your lebowski controller

Tomdb wrote:
Nov 22, 2017 1:51 pm
Got a lebowski Chip controlling a Honda IMA inverter Gen 2 i believe.
Tom, is that top pic the one you used for the IMA inverter? It looks so simple! Would you be willing to share the design files?
by coleasterling
Jan 23, 2018 1:19 am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Anyway of making the R martins from china sold on Ali express road legal in U.S.
Replies: 21
Views: 318

Re: Anyway of making the R martins from china sold on Ali express road legal in U.S.

No, it isn't retroactive like that. There are plenty of vehicles legally on the road from now defunct brands. It does mean that no matter how similar your vehicle is to one that used to be manufactured, if it is a complete vehicle and not a kit, it can't be imported unless the current manufacturer i...
by coleasterling
Jan 22, 2018 1:32 pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Anyway of making the R martins from china sold on Ali express road legal in U.S.
Replies: 21
Views: 318

Re: Anyway of making the R martins from china sold on Ali express road legal in U.S.

It doesn't really matter if the a company imported the bike legally originally or not. If it doesn't have a 17 digit VIN from a company currently registered with NHTSA and EPA (Yes, EPA compliance is necessary.), then you won't be legally registering in the US per federal regs. EPA is about $1800 a ...
by coleasterling
Jan 15, 2018 4:18 pm
Forum: Battery Technology
Topic: Cool student project!
Replies: 18
Views: 522

Re: Cool student project!

coleasterling: Well that's a little harsh, but you are correct. Like many FH teams, we didn't pass tech (though the design of our battery was not the culprit there as far as I know). At least in my time, our team was often guilty of focusing more on fun engineering projects than the challenge of ge...
by coleasterling
Jan 13, 2018 12:16 am
Forum: Battery Technology
Topic: Cool student project!
Replies: 18
Views: 522

Re: Cool student project!

They failed miserably, having never passed tech with a car that was on a 2 year development cycle. Here's a link to car info: https://urchinz.github.io/FH_Web/content/VMR-2.html
by coleasterling
Jan 12, 2018 2:59 pm
Forum: Battery Technology
Topic: Cool student project!
Replies: 18
Views: 522

Re: Cool student project!

Most teams don't use the max 600V. There's actually a pretty good distribution with most teams between 300V and 500V. The best teams are typically around 450V. The pack design linked above is for Formula Hybrid in the US, which has a 300V limit along with FSAE-E at Lincoln, NE. FH has some significa...
by coleasterling
Dec 19, 2017 1:54 pm
Forum: E-Vehicles General Discussion
Topic: MotoGP electric catagory "Moto-e
Replies: 13
Views: 386

Re: MotoGP electric catagory "Moto-e

I'm pretty disappointed in the bike and format choice. The whole thing just sounds boring right now. I'm guessing they are planning to open it up like Formula E, so maybe it'll better in the future.
by coleasterling
Dec 01, 2017 2:07 pm
Forum: E-Vehicles General Discussion
Topic: Madness. Why such slow penetration for hybrid?
Replies: 65
Views: 1766

Re: Madness. Why such slow penetration for hybrid?

Yeah.. i completely agree with that. Hybridizing things is actually rather easy and cheap compared to electrifying things. Seems like less resource usage overall. I disagree with this. You've got two completely separate drive systems to integrate instead of just one engine or motor. Some of the OEM...
by coleasterling
Nov 23, 2017 10:10 am
Forum: Motor Technology
Topic: Driving IPM Motors Neglecting Reluctance?
Replies: 6
Views: 245

Re: Driving IPM Motors Neglecting Reluctance?

Thanks Fechter and Luke! I thought Arlin had made changes to suit the IPM, no? In my understanding, you need to characterize the angle of the reluctance torque at many different commanded current values, since it changes with current? Something like that. Anyway, a lookup table was proposed, but I d...
by coleasterling
Nov 22, 2017 12:39 pm
Forum: Motor Technology
Topic: Driving IPM Motors Neglecting Reluctance?
Replies: 6
Views: 245

Re: Driving IPM Motors Neglecting Reluctance?

Bumping this one more time before giving up. Anyone tried this on a loaded motor?
by coleasterling
Nov 20, 2017 2:13 pm
Forum: Motor Technology
Topic: Driving IPM Motors Neglecting Reluctance?
Replies: 6
Views: 245

Re: Driving IPM Motors Neglecting Reluctance?

Update: Looks like it works just fine no-load on a couple HVH250's I have here, though I don't have any method of dynoing or loading them. My main question now is to find out what that does to efficiency.
by coleasterling
Nov 16, 2017 11:27 am
Forum: Motor Technology
Topic: Driving IPM Motors Neglecting Reluctance?
Replies: 6
Views: 245

Driving IPM Motors Neglecting Reluctance?

Hey Guys, I've got a few IPM motors from various hybrid projects laying around, but don't yet have a firm enough grasp on the control theory to build an inverter (Lebowski, Hubner, etc...) to drive them properly. Is it feasible to drive IPM's with our standard vehicle and ebike controllers, only tak...
by coleasterling
Nov 07, 2017 4:47 pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Evoke Motorcycles
Replies: 12
Views: 1072

Re: Evoke Motorcycles

I've spoken with these guys and it is apparent they are very passionate about the product. The platform is very similar to other Chinese e-motorcycles and they seem to be doing what I would like to do on a smaller scale, which is modify a complete Chinese e-motorcycle with better cells and wiring an...
by coleasterling
Nov 07, 2017 11:22 am
Forum: Motor Technology
Topic: Another SMD lebowski PCB
Replies: 107
Views: 5179

Re: Another SMD lebowski PCB

I'm in
by coleasterling
Oct 23, 2017 12:15 pm
Forum: Motor Technology
Topic: Time for MORE POWER! 1400a 1200v IGBT controller build!
Replies: 59
Views: 2648

Re: Time for MORE POWER! 1400a 1200v IGBT controller build

Did you model the bus bars as sheet metal features in SW? If so, great job. That makes it a lot easier to unfold and send out for laser work.
by coleasterling
Oct 17, 2017 11:16 pm
Forum: Motor Technology
Topic: Time for MORE POWER! 1400a 1200v IGBT controller build!
Replies: 59
Views: 2648

Re: Time for MORE POWER! 1400a 1200v IGBT controller build

Updated. I cheated and just made an extrude-cut to open up the space. I assumed an equal cut on either side. If that's not the case, it is adjustable if you edit the sketch in the last extrude-cut feature on the tree and change the dimension at the top.
by coleasterling
Oct 17, 2017 11:07 am
Forum: Motor Technology
Topic: Time for MORE POWER! 1400a 1200v IGBT controller build!
Replies: 59
Views: 2648

Re: Time for MORE POWER! 1400a 1200v IGBT controller build

Not 100% sure which dimension that is when looking at a plan view of the module. If that was built from your original sketch, that could be difficult. If you can highlight what's wrong and give me the correct dimension, I'll hop to fixing it. I also heard from my local distributor for Powerex, so th...
by coleasterling
Oct 15, 2017 8:23 pm
Forum: Motor Technology
Topic: Time for MORE POWER! 1400a 1200v IGBT controller build!
Replies: 59
Views: 2648

Re: Time for MORE POWER! 1400a 1200v IGBT controller build

Lmfao So dumb to make you sign a NDA for a SW file :roll: Anyways thank you very much. How much time from where I was to this did it take you and what all (short answers) did you have to do? I will now start trying to make the layout. -Arlin It took a bit to figure out how to handle the workflow, b...
by coleasterling
Oct 13, 2017 11:26 am
Forum: Motor Technology
Topic: Time for MORE POWER! 1400a 1200v IGBT controller build!
Replies: 59
Views: 2648

Re: Time for MORE POWER! 1400a 1200v IGBT controller build

Finally something in my wheelhouse...Stay far away from Freecad and use Fusion. It IS free for hobbyist and education use. I have a subscription because I use it for all my 3D and multi-axis toolpath work on the CAM side. Coming from SW before Fusion, I don't find it intuitive at all. Most people wh...
by coleasterling
Oct 11, 2017 4:03 pm
Forum: Motor Technology
Topic: Time for MORE POWER! 1400a 1200v IGBT controller build!
Replies: 59
Views: 2648

Re: Time for MORE POWER! 1400a 1200v IGBT controller build

Down to help any way I can, whether it be machining or SW or whatever. Shoot me the SW file and I'll see what I can do with it.

-Cole
by coleasterling
Sep 21, 2017 12:41 pm
Forum: E-Bike General Discussion
Topic: Universal Input Power Supply as DC-DC Converter?
Replies: 7
Views: 310

Re: Universal Input Power Supply as DC-DC Converter?

Thanks for the input! I'm very familiar with regular automotive voltages and will be using custom lighting solutions as you said. I suppose I could go to their 15V version. Doesn't really matter one way or another for my application.
by coleasterling
Sep 19, 2017 5:02 pm
Forum: E-Bike General Discussion
Topic: Universal Input Power Supply as DC-DC Converter?
Replies: 7
Views: 310

Re: Universal Input Power Supply as DC-DC Converter?

I've used those many times with good results. Depending on the model, the minimum voltage you need to run it may vary widely. Pretty much anything will work at 72v and above. I've seen some that would work all the way down to 24v. Also, if the input voltage drops too low, it won't be able to make t...
by coleasterling
Sep 19, 2017 4:57 pm
Forum: E-Bike General Discussion
Topic: Universal Input Power Supply as DC-DC Converter?
Replies: 7
Views: 310

Re: Universal Input Power Supply as DC-DC Converter?

Has anyone used a power supply such as below as a DC-DC in their bike? I've used 48V Meanwell power supplies adjusted down to 42V to charge my ebike and it's worked well. The key is current limiting. If it uses true current limiting (i.e. limit to 120% of the supply's rating or something) it will w...
by coleasterling
Sep 19, 2017 1:58 pm
Forum: E-Bike General Discussion
Topic: Universal Input Power Supply as DC-DC Converter?
Replies: 7
Views: 310

Universal Input Power Supply as DC-DC Converter?

I'm having trouble sourcing an affordable, low power, high voltage, isolated DC-DC converter. Has anyone used a power supply such as below as a DC-DC in their bike? http://www.mouser.com/ProductDetail/Mean-Well/GSM90B12-P1M/?qs=sGAEpiMZZMs2%252bVrH5rwl1sbqG1JoHIfzlcepGcWEcwLf%2fL697jKbQw%3d%3d Is th...