Search found 23 matches

by hipo_ev
Sun, 06 Jun 2010, 07:58
Forum: Technical and conversion discussion
Topic: Breaking up the pack
Replies: 39
Views: 4199

Breaking up the pack

What about the Anderson SBE700. It is rated at 700amps continuous, and has a lever action plug. pdf is available HERE.
by hipo_ev
Thu, 20 May 2010, 21:16
Forum: Electric motors and controllers
Topic: Open Source DC controller
Replies: 110
Views: 19940

Open Source DC controller

I'm considering SkyEnergy 180ah cells Adam. They are rated as supporting 4C, so can potentially provide upto 720a without much fuss. With 720a passing through them, I am quite confident that the contacts in an EV200 would weld shut in no time. The only option that makes sense to me is either of the ...
by hipo_ev
Tue, 18 May 2010, 19:06
Forum: Electric motors and controllers
Topic: Open Source DC controller
Replies: 110
Views: 19940

Open Source DC controller

Sorry for the off topic The two highest rated contactors I know are: Tyco Kilovac EV500-4A Gigavac GX16 They can both break ~3000A, and safely break ~2000a at 240v, but even those are not rated at 1000a. The Tyco is rated at 750a and the Gigavac is rated at 600a. Both should, however, be perfectly f...
by hipo_ev
Tue, 18 May 2010, 18:03
Forum: Electric motors and controllers
Topic: Open Source DC controller
Replies: 110
Views: 19940

Open Source DC controller

Hi Haydon, Yeah, sounds like we are aiming for similar performance. I've mentioned it in my other thread, but basically I'm looking to build a car suitable for track work so it can be used in time attack events. The car will need to be able to perform 3 laps around a race for each round of the time ...
by hipo_ev
Tue, 18 May 2010, 17:42
Forum: Electric motors and controllers
Topic: Open Source DC controller
Replies: 110
Views: 19940

Open Source DC controller

Thanks for the reply Johny. The IGBTs I listed were just some that I found for sale on Ebay. I have not purchased them so am very flexible as to what I will use. As mentioned I have very limited (high school only) knowledge of electronics - basically I was just searching ebay for an IGBT that was ra...
by hipo_ev
Tue, 18 May 2010, 17:14
Forum: Electric motors and controllers
Topic: Open Source DC controller
Replies: 110
Views: 19940

Open Source DC controller

I read that in the current design, you can swap out the mosfets for IGBT to support higher voltage and amps. I would like the controller to support ~240v and 1000a, so is it as simple as purchasing IGBTs that are rated high enough to support that voltage and amps - or do other components in the open...
by hipo_ev
Mon, 08 Mar 2010, 02:47
Forum: Technical and conversion discussion
Topic: What's really required?
Replies: 35
Views: 5111

What's really required?

So if I understand right, the controller can use the available volts to make the extra current required, but because voltage is being limited to the motor, overall power from the motor is limited as well. So although the controller will provide more current to the motor, which inturn allows the moto...
by hipo_ev
Sun, 07 Mar 2010, 03:34
Forum: Technical and conversion discussion
Topic: What's really required?
Replies: 35
Views: 5111

What's really required?

I'm not sure I understand what is required now lol. I had originally thought you needed cells that can support how many amps the controller can draw - so if I had a 1000A controller, the cells needed to be able to discharge 1000A at any given time? But if I understand it correctly now, the cells don...
by hipo_ev
Fri, 05 Mar 2010, 21:17
Forum: Technical and conversion discussion
Topic: DC Circuit breaker 400 amps+
Replies: 17
Views: 4823

DC Circuit breaker 400 amps+

Just reread other suggestions and they are the same lol. Sorry. Don't confuse the breaking capacity of contactors/CBs in AC or ms DC with their capacity to break thousands of amps DC in a fault condition in an EV. The 10kA or 30kA breaking capacity is not realisable in DC situations. These Airpax ci...
by hipo_ev
Fri, 05 Mar 2010, 15:48
Forum: Technical and conversion discussion
Topic: What's really required?
Replies: 35
Views: 5111

What's really required?

whether the cells are in series or parallel their total KW output is the same. The controllers can't switch cells between series and parallel (as it would change the input voltage) and there would be no benefit - since it can already convert volts to amps for high current low rpm use. i didn't even...
by hipo_ev
Thu, 04 Mar 2010, 21:26
Forum: Technical and conversion discussion
Topic: What's really required?
Replies: 35
Views: 5111

What's really required?

Thanks for the calculations Matt, very much appreciated - I have another question for you now :) I was readying about WZ and how it has dual motors and his Zilla can switch from parallel to series to improve hp. Is this possible to reproduce using a single motor but switching the traction pack from ...
by hipo_ev
Mon, 22 Feb 2010, 22:06
Forum: Technical and conversion discussion
Topic: Guestimating battery pack sizing
Replies: 13
Views: 1521

Guestimating battery pack sizing

Johny wrote: Did your gleaned input data mainly use Lead-acid or Lithium chemistry?
Sorry, I should have specified, this was based on LiFePO4 results.

And like I said, it is my own hard/fast rule (ie. more of an observation by me based on minimal results so far), rather then something "gleaned" ;)
by hipo_ev
Mon, 22 Feb 2010, 22:02
Forum: Batteries, charging, management and monitoring
Topic: Kokam batteries
Replies: 15
Views: 4107

Kokam batteries

Might be worth spraying each end with CRC battery terminal protector or similar product (vaso at a min) just to be safe :)
by hipo_ev
Mon, 22 Feb 2010, 21:54
Forum: Batteries, charging, management and monitoring
Topic: Home grown BMS ideas !
Replies: 781
Views: 114551

Home grown BMS ideas !

I have no problems purchasing from ppl who hold patents, but if the patent holder of this specifically vague patent is going to sue others in the EV community for making their own BMS from their own combined effort and knowledge just because their implementation is a "per cell" design, then I will d...
by hipo_ev
Mon, 22 Feb 2010, 20:53
Forum: Batteries, charging, management and monitoring
Topic: Kokam batteries
Replies: 15
Views: 4107

Kokam batteries

It might pay to wait a little bit before purchasing your headways. I just read a post on the EVDL mailing list showing rusted Headway cells. Basically the end of each cell has rusted after being stored.

His blog is HERE if you want to have a read.
by hipo_ev
Mon, 22 Feb 2010, 20:48
Forum: Batteries, charging, management and monitoring
Topic: Home grown BMS ideas !
Replies: 781
Views: 114551

Home grown BMS ideas !

So who is Mr. X? If he is going to sue over this patent, I want to ensure I never purchase anything from him or his company.

Cheers.
by hipo_ev
Mon, 22 Feb 2010, 20:38
Forum: Technical and conversion discussion
Topic: Guestimating battery pack sizing
Replies: 13
Views: 1521

Guestimating battery pack sizing

From going over usage posted on various forums and mailing lists, the hard/fast rule I have worked out is 15kWh per 1000kg per 100km at 80% DoD ie. if your car weighed 1000kg and you had a 15kWh pack you'd get ~100km of travel from it at 80% DoD. This is just my own hard/fast rule, but it seems to w...
by hipo_ev
Tue, 09 Feb 2010, 15:19
Forum: Technical and conversion discussion
Topic: What's really required?
Replies: 35
Views: 5111

What's really required?

wow, thanks for all the info Matt - much appreciated. if you can only afford a 160v setup, then id recommend getting a 160v motor to get the most out of the system np. I initially was going to just go the standard warp11 and was only considering the HV because I wasn;t sure if I needed to go higher ...
by hipo_ev
Tue, 09 Feb 2010, 14:46
Forum: Technical and conversion discussion
Topic: What's really required?
Replies: 35
Views: 5111

What's really required?

Labour own labour is free :) And getting a few mates to help out here and there only costs beer and a bbq :p Motor adaptor to gearbox Motor frame to engine mounts. Battery box I've got a mig, andenough tools to do the engine mounts and battery box, and a mate is an engineer and can do the adapter a...
by hipo_ev
Tue, 09 Feb 2010, 05:37
Forum: Technical and conversion discussion
Topic: What's really required?
Replies: 35
Views: 5111

What's really required?

Hi Matt, Cheers for the info and reply :) 0-100 in 6, and 0-400 in 13 isn't possible for a conversion of that size with just $30k (the 0-400 will be the hard one) What calculations do you use to work this out? the next thing is that without timing advance (which generally means your motor is too sma...
by hipo_ev
Mon, 08 Feb 2010, 22:30
Forum: Technical and conversion discussion
Topic: What's really required?
Replies: 35
Views: 5111

What's really required?

Hi EClubman, Thanks for the reply. I originally considered the Zilla 2K, but I read they had a long waiting list (6 months?) whereas the Warp-Drive controllers were ready to be shipped. If I didn't have a budget, I'd go for a Kokam or A123 pack, but I am limited to $25k (ie. car has to be complete, ...
by hipo_ev
Mon, 08 Feb 2010, 20:32
Forum: Technical and conversion discussion
Topic: What's really required?
Replies: 35
Views: 5111

What's really required?

Hi Woody, Thanks for the quick reply mate :) I originally got interested with EVs after seeing the Tesla several years ago and the performance it offers, and now after a couple of months of reading I now am ready to build an EV with similar performance - so I'd say the Tesla roadster is more of a be...
by hipo_ev
Mon, 08 Feb 2010, 18:21
Forum: Technical and conversion discussion
Topic: What's really required?
Replies: 35
Views: 5111

What's really required?

Long time reader, first time poster - Hi :) A few questions - sorry up front for silly questions. I have a basic understanding of what I require, but what I do not know are the exact requirements (ie. amp ratings of contactors and fuses). What I am looking to build is a hi performance EV (from a Sub...