Warp 9 Motor

[vmrod]

Link to Impulse motors.

www.go-ev.com/WarP.html

[vmrod]

Well, I will use a 9" motor, and most likely, a Warp 9.

Since I plan on have a dual set of gears (hi/lo gear), that means I will use both sides of the motor shaft. On the Warp 9, the commuter end (CE) is smaller than the drive end (DE). I'm not so sure that the smalelr CE shaft could handle the torque that might get inflicted upon it, so I'm looking into other options right now.

Option 1, will be to make it work with the Warp 9. If this can happen, it would mean that the roto-cam clutch, would stick out 2 inches or so more than it does now. (This might be OK)

Option 2, will be to use a TransWarp 9. That way I can use both ends of the shaft. One problem is that the drive end is splined like a TH400 transmission. If I get the TransWarp, I have more future diversity, as this motor can work with lots of light-weight (and 'normal' weight) vehicles. Perhaps I can use this option, but construct both gear sets on the drive end? I'll think about this. This would leave the CE for the shaft-speed sensor.

[vmrod]

Another option that ahs surfaced that I am jumping on....

Use a TransWarp 9 motor, that will turn a snow mobile torque converter CVT (variable pulley system).

I've talked to engineers from both companies, and it sounds like this could be a very viable idea. The clutches would be removed from the CVT, so there would be instant engagement of the drivetrain. The secondary pulley would determine the amount of torque required before 'downshifting' or 'upshifting'.

Gimme another week or 2, then I'll decide which path to take.

[vmrod]

I had decided awhile ago, to go ahead and place the e-motor in the front of the car, and use the VW tranny with it.

As I'm getting closer and closer to the purchase of the e-motor, I'll be checking very carefully if this motor is the best size for my application. Bigger may not always be better. However, I want to have a vehicle that has awesome pickup. (0-60 in the 6 second time, or as best as possible)

[jritt]

I am planning on using a rear wheel drive setup like the plans call for but I am going to use a WarP 9 turning clockwise and have a direct drive from the motor to the rear axle. NetGain will make an extended shaft version for any who want to get one. Here is the e-mail I got from them today.


Joseph,

I believe we talked this morning.....

We can extend the shaft on ANY one of our motors (but I prefer to only do ONE!). The cost for the engineering change is around $600.00. (a one page drawing change to the shaft, and then 25 pages of drawings copied to a new part number, new BOM, new work order, etc.). I have to cover the CAD/CAM costs on this at $150/hr - we've done similar things, so I know about how much time it will take....

I would prefer doing a small batch of 10 motors in order to "eat" the costs, otherwise I will split the costs with you on anything less than 5 ordered together - we can drop ship to separate locations, or they can be picked up at the warehouse.

Shipping to MO is reasonable, around $125.00, BUT residential delivery adds $75.00 (find a business with a forklift!). Lift-gate service is also available for $75.00 (use a couple of 2*6's and slide it off the truck...).

We can only sell through our Dealers, (it might be beneficial for you to become a Dealer (3 motor order required...)

Enjoy,
George Hamstra



Where he says by ONE he means one type of motor.

[jritt]

I did the math and to get a 0-60mph time of 10sec I need to average 80ft/lbs of torque from this motor. The carbon fiber belt can handle 160ft/lbs continuos with a 2.5" pulley on the motor and a 12.5" pulley on the rear axle. With a 500amp controller I should be able to limit the motor to around 140ft/lbs to stay safe and get the times below 9sec. vmrod have you figured out if you can make 6 secs the the transmission?

[chrisdolph]

You are still going to need to use a jackshaft. it is placed at the pivot point of the rear swingarm so you don't have any tension variances with the belt as the swingarm moves up and down. you could redesign the rear suspension so that the motor shaft is the center of the pivot point, or the motor is attached to the arm instead but it might just be easier to use a jackshaft (without the clutch) like in the plans.

[jritt]

Yup. You are right.

[vmrod]

I did not do the math to figure out the acceleration via the VW tranny.

I used a more unconventional approach to calculate acceleration and top end speed.

For top end, it was easy. A VW engine red-lines around 5,500 rpm or so. The Warp 9 motor tops out roughly the same. So, therefore my top speed should be about the same as a beetle. (80-85MPH) Since I have 17" rims and a VW has 15" rims, I will likely get a top speed on the higher side of the prior mentioned range.

For acceleration, I looked at a vehicle with similiar components, then made an assumption that my vehicle would perform in a similiar fashion. Plasma Boy's "Blue Meanie" has the same motor and controller as what I have (or will eventually have). The battery pack voltage will be close to the same. (I think I will go with 156V) My pack will have less amp hours than his, but the high 'C' factor will make up for it. Lastly, my vehicle will weigh much less than his. I figured this would make up for any differences in any slight gear-ratios that may exist.

[vmrod]

;D ;D

The mighty Warp 9 was ordered today, along with the forced air cooling band.

The cooling band was a little pricey. I know I could fab it myself in a day, but I have a lot of EV stuff in the works right now, so this buys time for those other things.

Next step is the adaptor plate....

[vmrod]

This motor is truly a might beast! If you can add enough batteries to supply the power, than this is what you want!

I wonder that perhaps an Impulse 9 may be just as good as the Warp 9 in this application. It is a little smaller, and less powerful, but I really don't think I will use all of the power that the Warp 9 can provide. The Warp 9 is more efficient due to the increased windings over the Impulse 9, but again, perhaps the Impulse 9 is just as good.

The next chassis I build may see an Impulse 9 in it! ;D