[somanywelps]

Originally Posted by Ravishankar

Here is something interesting for all guys considering Remy..
http://www.d1g1taldr1ve.com/d1-overview/

This is a complete Remy250 PM type motor and controller AND a single reduction ratio gearbox AND differential - (according to the site: The D1 is slated for delivery in Q2 of 2011, for under $8999. Additional models, including a high performance version, are currently under development!).

Great! But my initial mail asking for a AC IM type instead of PM typeto them went un-responded..

That's very low power. As for the gearbox, just plug the motor straight into a differential. Same effect. If you have enough torque, you could even use an LSD.

The scott drive is a 150kw peak for $3k, and there is a 100kw peak motor to $2.5k with it in a package....

[Ravishankar]

Originally Posted by somanywelps

That's very low power. As for the gearbox, just plug the motor straight into a differential. Same effect. If you have enough torque, you could even use an LSD.

The scott drive is a 150kw peak for $3k, and there is a 100kw peak motor to $2.5k with it in a package....

I had see scottdrive once before. So I decided to check the it out once again here:
http://shop.greenstage.co.nz/product...-motor-package

And here is something:
"This 100kW AC drive packages includes a purpose built EV inverter and a 3 phase permanent magnet motor. The motor is rated for 35kW continuous, with 100kW peaks for up to 10 sec"

So if the motor is capable of 100KW then what is the use of having a controller of 150KW ?

Besides the peak is for 10s which is not impressive. Also the Chinese made motor weighs 80kgs! Where as the Remy has a continuous rating of 60KW and a peak of 75KW. And the Remy based package weighs 59kgs in total:

http://www.d1g1taldr1ve.com/d1-tech-specs/

This is typical of Remy since it has the patented HVH stator windings that lower the temperature upto 20 degC.

http://www.greencarcongress.com/2010...-20100216.html

All this is ofcourse is no commercial for Remy! So , though the scott dive controller looks impressive with the packaged BLDC motor for USD 5495, the motor really fails to pass muster.


Also it brings me to another topic: why do people need so much power. To comfortably accelerate a 1000kg car, we only need a motor with 75KW peak. It is really cost that matters to bring EV's to the masses! Remy: Please do put good AC IM motors on to the off the shelf products..!

[bjfreeman]

Originally Posted by Ravishankar

Also it brings me to another topic: why do people need so much power. To comfortably accelerate a 1000kg car, we only need a motor with 75KW peak. It is really cost that matters to bring EV's to the masses! Remy: Please do put good AC IM motors on to the off the shelf products..!

are you considering starting on the 50% grade and accelerating.
that is most of our terrain is, in the NW of US.
Also what is the top continuous speed with 75KW for a box type car frame you have a lot of wind resistance.

[somanywelps]

Originally Posted by Ravishankar

I had see scottdrive once before. So I decided to check the it out once again here:
http://shop.greenstage.co.nz/product...-motor-package

And here is something:
"This 100kW AC drive packages includes a purpose built EV inverter and a 3 phase permanent magnet motor. The motor is rated for 35kW continuous, with 100kW peaks for up to 10 sec"

So if the motor is capable of 100KW then what is the use of having a controller of 150KW ?

Because greenstage matched it with a weaker motor. I think the controller is $3k and you can go grab a 150kw motor if you want and you'll still be less than that digitaldrive one.

[Nuts&Volts]

We use an HVH250 in a motorcycle project. Way to heavy and big for a motorcycle, but it would be perfect for a car. It is very reliable and delivers the power. We only have only used 110HP from it with our controller and didnt see higher than 45degC at 300Arms. We may be looking at selling our very lightly used Remy motor later this year.

-Kyle

[Ravishankar]

Originally Posted by bjfreeman

are you considering starting on the 50% grade and accelerating.
that is most of our terrain is, in the NW of US.
Also what is the top continuous speed with 75KW for a box type car frame you have a lot of wind resistance.

Well a 50% grade is just too much even for a normal car. The power required in that case would very much depend on weight. Certainly not applicable to the pickups that are so common in the US.
How much 75KW = 100hp can do.
According to this article:
wps.aw.com/wps/media/objects/877/898586/topics/topic02.pdf

It is enough to propel a 1241kg car with a Cd of 0.35 from 0 to 100kmph in 6.1 seconds. So I guess 75KW is enough power for any medium sized car..

[Ravishankar]

Originally Posted by Nuts&Volts

We use an HVH250 in a motorcycle project. Way to heavy and big for a motorcycle, but it would be perfect for a car. It is very reliable and delivers the power. We only have only used 110HP from it with our controller and didnt see higher than 45degC at 300Arms. We may be looking at selling our very lightly used Remy motor later this year.

-Kyle

Nice info! That could be one hell of a motorbike! Any link to your project ? Do you mean 11hp or 110hp ?? Also was your motor AC or PM type ? Which controller did you use ? Where did you buy it the motor..? A lot of Qns )

[Nuts&Volts]

Originally Posted by Ravishankar

Nice info! That could be one hell of a motorbike! Any link to your project ? Do you mean 11hp or 110hp ?? Also was your motor AC or PM type ? Which controller did you use ? Where did you buy it the motor..? A lot of Qns )

Our webpage is here, http://bemrt.org.ohio-state.edu/ , but it still needs a lot of work...

I do indeed mean 110HP or ~80kW after losses. This was dyno'd with our pack sagging horribly to 400V. We could probably get close to 130HP fresh off the charger with better cells. We have the PM motor which is a BLDC because it has a trapezoidal back-EMF. We use a Tritium Wavesculptor 200 with a 112s LiPo battery pack (or 415V nominal, 465V charged). This battery has unfortunately been retired due to a lot of low quality cells committing suicide right in the middle of a pack.

We actually were able to source the motor direct from Remy. I don't know the details of this procurement because I was not involved at that stage.

-Kyle

[Ravishankar]

Originally Posted by Nuts&Volts

Our webpage is here, http://bemrt.org.ohio-state.edu/ , but it still needs a lot of work...

I do indeed mean 110HP or ~80kW after losses. This was dyno'd with our pack sagging horribly to 400V. We could probably get close to 130HP fresh off the charger with better cells. We have the PM motor which is a BLDC because it has a trapezoidal back-EMF. We use a Tritium Wavesculptor 200 with a 112s LiPo battery pack (or 415V nominal, 465V charged). This battery has unfortunately been retired due to a lot of low quality cells committing suicide right in the middle of a pack.

We actually were able to source the motor direct from Remy. I don't know the details of this procurement because I was not involved at that stage.

-Kyle

Monstrous power for a motorbike. I wonder if it does not fly.. .. But then the batteries have to keep with the power requirements. 10C or 20C discharge rates..May be you should try the new A123 nanophosphate-ext cells..

Still a open, is there any out there who has used the HVH250 AC IM type motor..

[Nuts&Volts]

Originally Posted by Ravishankar

Monstrous power for a motorbike. I wonder if it does not fly.. .. But then the batteries have to keep with the power requirements. 10C or 20C discharge rates..May be you should try the new A123 nanophosphate-ext cells..

Still a open, is there any out there who has used the HVH250 AC IM type motor..

Actually with our 14.5kWh pack we only ran a 6C discharge rate on 25C rated cells. However our machine was over 620lbs ready to race.

The EcoCAR team in our shop also uses the HVH250 but with their own casing and cooling scheme. And some of the A123 batteries. Those cells arent energy dense enough for a motorcycle thou.