Search found 168 matches

by Mesuge
Mon, 18 Oct 2010, 10:54
Forum: Members Machines
Topic: CZal's Mazda Roadster (MX-5)
Replies: 107
Views: 15970

CZal's Mazda Roadster (MX-5)

All very good info, recommendations, and yet above it you have to take into account, how they related these 0.3C continuous discharges for 3-4k cycles etc. in the first place!?! Specifically, they mostly talk only about a single cell (not connected in string of larger batt. pack) in clean and temper...
by Mesuge
Mon, 18 Oct 2010, 02:07
Forum: Batteries, charging, management and monitoring
Topic: New LiFeTech Energy HEHC LiFePO4 Cell
Replies: 15
Views: 4247

New LiFeTech Energy HEHC LiFePO4 Cell

There is a related thread on Endless: http://endless-sphere.com/forums/viewtopic.php?f=14&t=21866 The bottom line which justifed application is it good for? Apart from niche sponsored racing and boutique uber-high end projects, one additional and potentially much larger scale area of application whe...
by Mesuge
Sun, 17 Oct 2010, 02:38
Forum: The Lounge
Topic: Smart car conversion
Replies: 10
Views: 3047

Smart car conversion

It seems one of the most recent diy attempts with Smart is documented by Rickard&gang, they are basically using "reboxed" forklift low voltage ~120VDC bus AC Curtis with ~30kW emotor and retaining tranny (seems a bit underpowered package for it). The interesting point about Smart is the removable wh...
by Mesuge
Sat, 16 Oct 2010, 04:59
Forum: Technical and conversion discussion
Topic: Prius NHW20 transaxle
Replies: 16
Views: 7911

Prius NHW20 transaxle

Yep, that's exactly the point. I guess the biggest HSD from Toyota/licensed goes upto ~123kW (I listed these donor cars elsewhere). Another possible advantage of these larger perm MGs is that when using tranny retaining application, you can get away with ~50% power output and motor base speed reduce...
by Mesuge
Sat, 16 Oct 2010, 02:33
Forum: EV Motoring
Topic: Chevy Volt Backlash over EV Status
Replies: 9
Views: 2562

Chevy Volt Backlash over EV Status

I've heard this rumor before, do you think it's legit though? I don't see that physcial link to drivetrain on any posted diagrams and cutaways/mockups.. If true that would make it overpriced Prius PHEV clone, lol
by Mesuge
Fri, 15 Oct 2010, 13:02
Forum: Technical and conversion discussion
Topic: Prius NHW20 transaxle
Replies: 16
Views: 7911

Prius NHW20 transaxle

I guess we have already discussed it here: http://forums.aeva.asn.au/viewtopic.php?p=27049&t=1661#p27049 It seems the best practical way how to utilize Toyota's (or Ford, Nissan licensed) HSD components, is to use the MG2 only. The actual power depends on the package ~50-120kW (Prius, SUV, ..), the ...
by Mesuge
Mon, 26 Jul 2010, 01:08
Forum: Technical and conversion discussion
Topic: How to convert a hybrid
Replies: 132
Views: 22907

How to convert a hybrid

Again, true the "iconic" gen2 Prius is the most common donor out there, and 50-60kW (gen2-gen3) doesn't seem as much apart from projects targeted mostly as city econoboxes. I think there is a project by some australian university to have prius MG2 in empty housing attached to gen1 miata's tranny. Ho...
by Mesuge
Sun, 25 Jul 2010, 15:18
Forum: Technical and conversion discussion
Topic: How to convert a hybrid
Replies: 132
Views: 22907

How to convert a hybrid

Allow for a couple of points, firstly don't forget that apart from Prius (HSD) the system is also used/licensed in Lexus, Nissan, Ford hybrids. Moreover it comes in various power levels from 50kW - 120kw electrical. Perhaps 2mil of these cars has been produced up to this date, the surplus/salvage pa...
by Mesuge
Sat, 24 Apr 2010, 02:14
Forum: Electric motors and controllers
Topic: New AC controller now available
Replies: 46
Views: 8789

New AC controller now available

James, the manual cleared many questions, thanks for that. Btw. would you consider doing some research into these Siemens coppers as well, are they any good for this application? In terms of efficiency they are clearly outperforming the SEW.
by Mesuge
Sun, 18 Apr 2010, 02:15
Forum: Electric motors and controllers
Topic: New AC controller now available
Replies: 46
Views: 8789

New AC controller now available

matt> yes thanks for the reminder - I should have written it more clearly as to whether James used the stock fan for his dyno tests and/or what kind of custom/forced cooling setup was it? - http://www.drives.co.uk/news/technews/render.asp?file=news_technews426.htm http://www.drives.co.uk/news/images...
by Mesuge
Sat, 17 Apr 2010, 22:18
Forum: Electric motors and controllers
Topic: New AC controller now available
Replies: 46
Views: 8789

New AC controller now available

http://www.sew-eurodrive.co.nz/news/xml_images/1163660161DR_MOTOR.gif DRE series, btw. /FF stands for flange mounted w. bores ~= IEC B5 and LC/MC stands for copper cage rotor variant Color me stupid, but can't see those >90% efficiencies, it's more like 89% nom. >> Catalogue And if you brutally ove...
by Mesuge
Fri, 16 Apr 2010, 02:45
Forum: Electric motors and controllers
Topic: New AC controller now available
Replies: 46
Views: 8789

New AC controller now available

Fair enough, thanks for the detailed update.
7.5kW and 90% efficient? So these must be the alongated shape - perm ones, right? I think there is a vintage VW conversion thread with 11/15kW (in HV version) of these with ABB VFD somewhere buried in this forum.
by Mesuge
Fri, 16 Apr 2010, 00:29
Forum: Electric motors and controllers
Topic: New AC controller now available
Replies: 46
Views: 8789

New AC controller now available

Unfortunately the potential for volume is way less then the current unit but just thought I'd stick my 2 bob's worth in... Mesuge - your Avatar is 2MB in size - takes a long time to load and I don't even know how you convinced the forum to load it! That doesn't have to be the case, Tuarn's RedSuzi ...
by Mesuge
Thu, 15 Apr 2010, 12:28
Forum: Electric motors and controllers
Topic: New AC controller now available
Replies: 46
Views: 8789

New AC controller now available

James, is the 1200V IGBT version for high voltage setup off the table? You are using external HV contactor/fuse box anyway in your package, right? So, perhaps you might be interested. In that fashion you (and your customers) can run all sorts of interesting <500VAC motors, apart from industrial ACIM...
by Mesuge
Thu, 25 Mar 2010, 14:33
Forum: Electric motors and controllers
Topic: Introduction and Hitachi VFD
Replies: 18
Views: 2401

Introduction and Hitachi VFD

What should be noted is that these industrial VFDs are not automotive grade type of gear (vibration, temps, cooling, cycles etc.), so if you source one cheaply from ebay or surplus and you acknowledge this will be mostly experimental, fine. But I'd not recommend buying new VFD, say above 40kW nomina...
by Mesuge
Fri, 04 Dec 2009, 07:00
Forum: Electric motors and controllers
Topic: chooseing an engine
Replies: 12
Views: 1842

chooseing an engine

Also, look for the efficiency maps as nominal 7.5kW means <<90% efficiency. Some say, it's few % what the heck, but if you add all the losses from the entire electric food chain, every bit counts in the end, and one day with 4yrs plus old batteries and ever decreasing range, it's late to be sorry. S...
by Mesuge
Thu, 03 Dec 2009, 06:46
Forum: Technical and conversion discussion
Topic: reverse cycle air conditioning
Replies: 44
Views: 10529

reverse cycle air conditioning

I'd venture to call above suggested recycling or transplant of A/C-DC/DC combo & heating circuit (incl. compressor/radiator/pump/reservoir/12V batt. and sensor) from Prius donor/s as relatively straightforward process. The only bummer seems to be hidden in the voltage, Prius is ~201.6VDC nominal, Tu...
by Mesuge
Thu, 03 Dec 2009, 00:41
Forum: Technical and conversion discussion
Topic: reverse cycle air conditioning
Replies: 44
Views: 10529

reverse cycle air conditioning

Lets start with generic ICE aircon system schematics bellow: http://www.summersmotors.co.uk/images/air_conditioning.jpg --- OR Go find a Prius and grab the aircon. I wonder what voltage they expect? I could provide 300VDC by inverting to AC and rectifying again - keep the +/-300 VDC sides balanced. ...
by Mesuge
Wed, 02 Dec 2009, 14:42
Forum: Technical and conversion discussion
Topic: Electric Ghia: ABB VFD bench test and more
Replies: 4
Views: 984

Electric Ghia: ABB VFD bench test and more

Apparently, EVgrins flashing all over the neighborhood, congrats! Nice to meet you in person, hah. Btw. what options (modules) do you have on that ABB? Did you order that ext. dynamic braking unit? And do you plan to mount that display/hand held unit near the dash somewhere? Also for finding the pos...
by Mesuge
Thu, 15 Oct 2009, 08:05
Forum: Batteries, charging, management and monitoring
Topic: 624V of SLA chargers
Replies: 38
Views: 4981

624V of SLA chargers

The Insight PHEV guys (P. Perkins & gang) are using similar smps to fight the aging/imbalances of their OEM IMA Honda pack (Panasonic NiMH) - so they charge it <0.08C It's based on CC 48V power supply for running LED light assemblies, some models feature adj. current & voltage, PFC, eff. <90%, over ...
by Mesuge
Tue, 13 Oct 2009, 07:50
Forum: Batteries, charging, management and monitoring
Topic: 624V of SLA chargers
Replies: 38
Views: 4981

624V of SLA chargers

I'll expand the previous posts about SMPS with "chargers", look at their catalogue pages #55-58, several ways (power levels, efficiencies, %tol. and ripples) for 48V charging (120-1000W): 1/ pulse/voltage (bat./current detection) basic charger (55.2V with 105% overload for 14.49V) 13.8V but the bad ...
by Mesuge
Tue, 13 Oct 2009, 05:08
Forum: Batteries, charging, management and monitoring
Topic: 624V of SLA chargers
Replies: 38
Views: 4981

624V of SLA chargers

Good info. So they are just float charger CV 13.8vpc CC 2.5A So, are you sure that e-crazyman sells 48V ordinary float chargers, which at first glance appear as at least multi-stage(3) "smart" chargers? Well that should have rang some bells, as they are usually 5-10x more expensive. Perhaps you can...
by Mesuge
Tue, 06 Oct 2009, 02:21
Forum: General EV Discussion
Topic: 96v ,120v or 144v
Replies: 56
Views: 7971

96v ,120v or 144v

Goombi, selection/preference of traction technology depends on many factors. One conclusion we might hopefully all/majority of us agree on is that in case of following conditions: "CityHopper" - hilly terrain (regen) - mostly city traffic driving (regen) - no demand for highway speed and enroute fre...
by Mesuge
Sat, 18 Jul 2009, 02:28
Forum: Members Machines
Topic: Hemonster's ACIM conversion
Replies: 189
Views: 28751

Hemonster's ACIM conversion

Johny, look at the page #1 as I've linked previously, the Headway provided assembly blocks tend to crack rather easily. Also, I think they have to change the supplier of their BMS, so there are issues on this front as well. In any case to design/build your own case/assembly frame + BMS = more work &...
by Mesuge
Thu, 16 Jul 2009, 04:43
Forum: Batteries, charging, management and monitoring
Topic: Sky Energy LiFePO4 Bulk Buy this Week
Replies: 48
Views: 10200

Sky Energy LiFePO4 Bulk Buy this Week

Apparently some Sky Energy factory photos here http://www.evdl.org/archive/index.html#nabble-td23251023 2. the cells chemistery are same as ferrous phosphate-LFP at surface look if you bought from different manufacturers, but these cells are completely different. Ours is the promotion ones, with hi...