Search found 60 matches

by Digger11
Fri, 19 Mar 2010, 02:44
Forum: General EV Discussion
Topic: Why get an EV?
Replies: 311
Views: 28322

Why get an EV?

When the authorities can guarantee that the electrons arriving at my house are green and not black I will start to believe. I suppose then that you are not happy unless the bank gives you back the same notes you deposited in your account. No assurances from an accountant or auditor would be good en...
by Digger11
Wed, 17 Mar 2010, 16:19
Forum: Electric motors and controllers
Topic: Future Pricing for Motors and Controllers
Replies: 0
Views: 624

Future Pricing for Motors and Controllers

Was reading some old American threads and came across the pricing about 2 years ago for the following. Zilla 2K-HV May 2008   USD $4,675, March 2010 USD $4,175 Zilla 1K-HV May 2008   USD $2,627, March 2010 USD $2,675 TransWarp 11 May 2008   USD $3,730, March 2010 USD $3,735 Warp 9       May 2008   U...
by Digger11
Tue, 16 Mar 2010, 14:54
Forum: Electric motors and controllers
Topic: Open Source DC controller
Replies: 110
Views: 20286

Open Source DC controller

One more (theoretical question). If I do go Direct Drive with say a Netgain Warp 11 motor, would I be better off using 2 smaller Warp 9's instead ? The Warp 9's appear to be made to connect up in series quite easily - so I assume for a heavy little Mercedes, this might give more torque to get the th...
by Digger11
Mon, 15 Mar 2010, 23:14
Forum: Batteries, charging, management and monitoring
Topic: Life of LiFePo4
Replies: 13
Views: 1961

Life of LiFePo4

thanks Johny - I could never work out why people were only using 20% or 30% of the batteries capacity.
by Digger11
Mon, 15 Mar 2010, 23:11
Forum: Technical and conversion discussion
Topic: What's really required?
Replies: 35
Views: 5182

What's really required?

thanks - It's a pity the 2k controllers (and even 1k for that matter) are so expensive.
by Digger11
Mon, 15 Mar 2010, 21:59
Forum: Electric motors and controllers
Topic: Open Source DC controller
Replies: 110
Views: 20286

Open Source DC controller

I see 3,000 RPM for 100kmh currently. Not sure DC will be that happy at that constant speed. Maybe AC will be better - still in the brainstorming stage.
by Digger11
Mon, 15 Mar 2010, 21:57
Forum: Batteries, charging, management and monitoring
Topic: Life of LiFePo4
Replies: 13
Views: 1961

Life of LiFePo4

Specs as follows : Cycle life: 2000 to 80% DOD, 3000 to 70% DOD

Does that mean I shouldn't charge the batteries up until they drop to 70% ?
Isn't this counter-intuitive ? I would think that discharging the batteries more would work them harder and therefore restrict the number of recharge cycles ?
by Digger11
Mon, 15 Mar 2010, 21:36
Forum: Technical and conversion discussion
Topic: What's really required?
Replies: 35
Views: 5182

What's really required?

t it is generally better to buy a controller that has motor current twice max battery current, to make the most of your battery pack. Matt Sorry to butt in, but how do you calculate the maximum bsttery current ? If I buy say, 50 200aH LiFePo4 and at 1C that is 10000 amps. I have never heard of a 20...
by Digger11
Mon, 15 Mar 2010, 20:22
Forum: Electric motors and controllers
Topic: Open Source DC controller
Replies: 110
Views: 20286

Open Source DC controller

thanks BIGH,

I'm still in the planning stages but most likely going rear wheel direct drive (an old 190E Merc I have) and have read that 1000A is probably better as the Merc is a bit heavy (but a nice car).

TransWarp 11 to provide the power (yes, I'm saving the $'s).
by Digger11
Mon, 15 Mar 2010, 20:09
Forum: Electric motors and controllers
Topic: Open Source DC controller
Replies: 110
Views: 20286

Open Source DC controller

Anyone actually built one of these ? 144V 500A is probably good enough for me - would prefer 1KA, but for only about $250 USD this seems like good value (if it works).

What would be the operational differences between this Open Source Kit and say a Curtis or Zilla controller of similar rating ???