Search found 35 matches

by tsport100
Fri, 27 Dec 2013, 05:46
Forum: Members Machines
Topic: Voltron-Evo; jonescg's new electric race bike
Replies: 291
Views: 47761

Voltron-Evo; jonescg's new electric race bike

Thanks for the prompt reply. I'd heard they were around $6k before shipping so just curious how the price had almost doubled. Interesting to compare that with $14k for the Yasa, was that also the expected landed price? Just doing a bit of market research... I get a steady stream of inquiries for mot...
by tsport100
Fri, 27 Dec 2013, 05:15
Forum: Members Machines
Topic: Voltron-Evo; jonescg's new electric race bike
Replies: 291
Views: 47761

Voltron-Evo; jonescg's new electric race bike

Is it possible to get a break down of that "$11,000 landed price tag" for the EVO Motor?
by tsport100
Sun, 03 Mar 2013, 19:23
Forum: Members Machines
Topic: Sutho's DMC EV Electric DeLorean
Replies: 36
Views: 6601

Sutho's DMC EV Electric DeLorean

ok, can see from your numbers yours is an AFM-140-3.
by tsport100
Sun, 03 Mar 2013, 19:16
Forum: Members Machines
Topic: Sutho's DMC EV Electric DeLorean
Replies: 36
Views: 6601

Sutho's DMC EV Electric DeLorean

So yours is a 4 pole AFM-140-4?

Just trying to make sense of Evo's data sheet as they don't quote peak current and I noticed that the efficiency chart is for a 140-4 tested @ 600VDC wired in star.

BTW what final drive ratio are you running?
by tsport100
Sun, 03 Mar 2013, 17:37
Forum: Members Machines
Topic: Sutho's DMC EV Electric DeLorean
Replies: 36
Views: 6601

Sutho's DMC EV Electric DeLorean

So it's 600 Nm for 18 sec launch and 400 Nm for 60 sec peak?

What bus voltage are you running? The published Evo Electric data sheet seems to suggest their peak numbers were recorded @ 600v.
by tsport100
Sun, 03 Mar 2013, 04:13
Forum: Members Machines
Topic: Sutho's DMC EV Electric DeLorean
Replies: 36
Views: 6601

Sutho's DMC EV Electric DeLorean

Just curious how you are measuring that torque output?
by tsport100
Tue, 01 Dec 2009, 22:18
Forum: Technical and conversion discussion
Topic: 100kW AC Inverter Project (Opensource)
Replies: 75
Views: 33349

100kW AC Inverter Project (Opensource)

I bought 25 at a decent price quite a while ago so I'm beyond the stage of dithering about PCB layouts and the cost of a diode here or there. The original idea was reduced cost and they can be spread out over a larger surface area for heat sinking. If they're good enough for ACP and Tesla that's goo...
by tsport100
Tue, 01 Dec 2009, 20:46
Forum: Technical and conversion discussion
Topic: 100kW AC Inverter Project (Opensource)
Replies: 75
Views: 33349

100kW AC Inverter Project (Opensource)

Driving 4 gates off one driver is what I am prototyping now. From my research I don't see there being any concrete rule for that. I've found examples of single resistor for all 4 in parallel OR one for each gate based on papers put out by IR engineers. Parallel oscillation between can be eliminated ...
by tsport100
Tue, 01 Dec 2009, 14:02
Forum: Technical and conversion discussion
Topic: 100kW AC Inverter Project (Opensource)
Replies: 75
Views: 33349

100kW AC Inverter Project (Opensource)

These IGBTs are the EXACT part number as used by AC Propulsion in their AC-150 Inverter as used in the tzero / E-Mini etc.
by tsport100
Tue, 01 Dec 2009, 06:25
Forum: Technical and conversion discussion
Topic: 100kW AC Inverter Project (Opensource)
Replies: 75
Views: 33349

100kW AC Inverter Project (Opensource)

I am currently building an AC Inverter based on this microchip sample code. I've had the source code from App Note 908 ported from the 80 pin TQFP SMD 30f6010 to an easier to proto-type 28 pin DIP 30f3010. Space Vector code runs @ 20 kHz, currently in open mode. I've built the driver stage using Pow...
by tsport100
Fri, 05 Dec 2008, 06:39
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 8000

Hipo AWD project

You'll argue any point... who could be bothered!!! Now it's "high speed means dealing with a lot of energy" 2 posts ago it was "reduction in kinetic energy is very slow once you're doing 150km/h+" You simply have NO IDEA what you're talking about! I'm unsubscribing from this thread... ur just talkin...
by tsport100
Fri, 05 Dec 2008, 03:06
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 8000

Hipo AWD project

The thing is supposedly pulling 1500amps at 380v when in series off the line (not accounting for Voltage sag). The pack is 110 series x 11 parallel. I think A123 cells are 2.3 Amp each so that's 25.3A a @1C. A123 cells are rated at 50C burst so by my calculations they're actually coming up short on ...
by tsport100
Fri, 05 Dec 2008, 02:56
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 8000

Hipo AWD project

Where do you get these BS numbers??? The faster you go, the more rpm on the motor, the more power it has at higher rpm, (i.e torque x rpm = power) and that includes Regen. If you've ever seen a dyno chart of an AC motor that shows regen they are just a +/- reflection of each other. Being at full pow...
by tsport100
Fri, 05 Dec 2008, 02:18
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 8000

Hipo AWD project

I’m sure you’re all aware Formula 1 is going Hybrid next year with the specific aim of collecting energy from regen and using that as a ‘push-to-pass’ later in the lap. They’ve specifically limited the system to the rear axle only. We all know 70% of braking effort is on the front axle so they reall...
by tsport100
Mon, 01 Dec 2008, 19:17
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 8000

Hipo AWD project

Just get on with it. I do take Sundays off and break for lunch. http://forums.aeva.asn.au/smileys/smiley36.gif You have all those control algorithms to work on A system to run 4 wheel motors at a lower power level is already up and running and has been demonstrated on several vehicles. A 70Kw test ...
by tsport100
Mon, 01 Dec 2008, 17:43
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 8000

Hipo AWD project

You've hit the nail on the head. Not only can it use regen but DC injection and motor revese independantly on each wheel. The list of features can cover: -Intelligent ABS (standard ABS is 'dumb') -Active Stability control -Active brake force distribution (aka Brake bias) -Emergency brake assist to n...
by tsport100
Mon, 01 Dec 2008, 17:33
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 8000

Hipo AWD project

You don’t adjust your diff settings to fine tune handling! To adjust the front to back balance of the car can cover any area you can think of from weight balance, front to rear track width, ride height, tire width and compound, springs, shocks, aero etc the list goes on but diff setting is not one c...
by tsport100
Mon, 01 Dec 2008, 17:17
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 8000

Hipo AWD project

Nothing like a know all Naysayer. The reality check is this is my business I've had funding for the last 2 years to work on this exclusively and I'm extremely unlikely to tell you my operating budget or justify to you how I spend my budget. I didn't actually say I was doing everything myself persona...
by tsport100
Mon, 01 Dec 2008, 09:18
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 8000

Hipo AWD project

You certainly are digging but most of you're numbers are on the money. I have found a local (Newcastle) Dyno that can handle up to 150Kw but only at 50Hz. As for 2 x 75Kw industrial inverters there's 3 problems 1) None of the companies with big enough dynos can run variable frequency at this power l...
by tsport100
Mon, 01 Dec 2008, 06:49
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 8000

Hipo AWD project

All I can tell you at the moment is that it weighs 35kg and electrically it's 3 phase AC 400V @ 100A peak and will do 1500rpm @ 100Hz. The challenge at the moment is actually finding an electric motor dyno facility in Australia large enough to handle it that can also drive it up to 100Hz. Haven't fo...
by tsport100
Mon, 01 Dec 2008, 06:42
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 8000

Hipo AWD project

Talk in specifics. I still don’t get what you are talking about technically. What sort of EV motor are you talking about? An AC Induction motor draws maximum current at Pull out torque. POT is a specific % of rotor slip, it basically has NOTHING to do with RPM or road speed. Horsepower is Torque x R...
by tsport100
Mon, 01 Dec 2008, 03:35
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 8000

Hipo AWD project

"actually delivering the kilowatts on a constant basis is still a challenge!"

What exact 'challenge' are referring to? This makes no sense to me at all!
by tsport100
Mon, 01 Dec 2008, 03:28
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 8000

Hipo AWD project

I'd have to agree with JUK about unsprung weight in road cars, there's nothing lightweight about most road car suspension. While I don't think unsprung weight is super critical in a road car it can't be ignored. To get decent torque in a direct drive induction wheel motor requires a certain amount o...
by tsport100
Mon, 01 Dec 2008, 02:57
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 8000

Hipo AWD project

Gotta love those turbos. I'm fairly familiar with flat torque curves as my daily driver for the last 6 years has 495 Nm peak with probably 85-90% of that as low as 1500rpm. It just doesn't even notice hills. With a 3.08 diff in top gear it's theorectially 1525 Nm at the wheels, closer to 1000 Nm if ...
by tsport100
Mon, 01 Dec 2008, 01:46
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 8000

Hipo AWD project

An average ICE has peak torque up around 3500rpm. The ENTIRE reason a EV can go without a multi speed gearbox and an ICE can't go anywhere without one is purely their respective torque curves, they are the inverse of each other so there's little point saying they're simular. You're wrong about the g...