Search found 540 matches

by 7circle
Fri, 05 Sep 2014, 06:27
Forum: Nissan Leaf
Topic: BMS and contactor box
Replies: 20
Views: 7820

BMS and contactor box

Thanks for the inspection and links Coloumb. http://imagizer.imageshack.us/a/img742/1807/BNS5dy.jpg His "sketch" of the board has a 0.1uF filtering the 4.7uH on the path the cell terminals. He has schematics for the Mid and Bottom pairs of ASICs. The 0.1uF stumps my idea the ASIC may be using buck [...
by 7circle
Sun, 31 Aug 2014, 02:35
Forum: Members Machines
Topic: Weber and Coulomb's MX-5
Replies: 1698
Views: 334166

Weber and Coulomb's MX-5

http://forums.aeva.asn.au/smileys/smiley12.gif Oh you've really got your wires in a knot. Must be very frustrating You need some kind of voltage pulse that reflects back off the bad connection and measuring the timing and attenuation can locate how far along the series of cells the loss of continui...
by 7circle
Wed, 13 Aug 2014, 06:52
Forum: Mitsubishi
Topic: New to the forum & new I-miev
Replies: 448
Views: 44715

New to the forum & new I-miev

@acMoter : 3D Printing would be good if you could trust the longterm insulation of the Voltages passing through the CHAdeMo pins. Hi Kurt, Was pondering the choice between: 4S:400Ah or 16S:100Ah or 4P4S100Ah As you have a 48V/240vac sinewave inverter and your offGRID gear is 48V being able to have a...
by 7circle
Wed, 13 Aug 2014, 05:19
Forum: Batteries, charging, management and monitoring
Topic: gEDA PCB queries
Replies: 15
Views: 2421

gEDA PCB queries

The quick reference guide mentions how modify soldermask "K"learence of vias with use "K" and with Shift Alt and Ctrl, but just quickly/briefly. The TIPS guide is more clear. And appears very effective. ... How do I achieve open vias clear of soldermask In pcb vias are covered by soldermask by defau...
by 7circle
Tue, 12 Aug 2014, 17:36
Forum: Batteries, charging, management and monitoring
Topic: gEDA PCB queries
Replies: 15
Views: 2421

gEDA PCB queries

Missed your post while looking into the gEDA-PCB manual and prepping my post. According to the text file which is generated when you save your document, holes and vias are the same thing - an x coordinate, a y coordinate, diameter, maximum annulus size, line width, soldermask clearance and hole diam...
by 7circle
Tue, 12 Aug 2014, 03:07
Forum: Batteries, charging, management and monitoring
Topic: gEDA PCB queries
Replies: 15
Views: 2421

gEDA PCB queries

If you can't find a properties option for the placed vias, you could hack the file (but make a copy first) As your pcb is not too big you could edit the file. hopefully it is ascii/txt based and adjust the via "mask parameter. 8.8.29 Via ☛ ✟ Via [X Y Thickness Clearance Mask Drill "Name" SFlags] Via...
by 7circle
Tue, 12 Aug 2014, 01:18
Forum: Batteries, charging, management and monitoring
Topic: gEDA PCB queries
Replies: 15
Views: 2421

gEDA PCB queries

The options for Via through-holes is usually very limited. I had a look at the PCB eda manual. They spell it out ... 2.2 Vias Vias provide through-hole connectivity across all layers. While vias look a lot like element pins, don’t use vias for adding elements to the layout, even if that seems easier...
by 7circle
Mon, 11 Aug 2014, 07:11
Forum: Batteries, charging, management and monitoring
Topic: gEDA PCB queries
Replies: 15
Views: 2421

gEDA PCB queries

Assuming the function of the board is okay and your happy with the layout and think extra tidy-ups are not worth the time. And lethal voltages have been delt with and labled. And failure modes have been considered. Have a think about: - the two diodes top right have lines on the solder pads. - the f...
by 7circle
Thu, 31 Jul 2014, 23:23
Forum: The Lounge
Topic: What have I done????
Replies: 36
Views: 4628

What have I done????

@Richo - That is a helpful graph and would apply to the WEG-48V-50Hz with say a 200Vdc battery. @ Terry - Do you know how heavy the motor is. Any other dimentions. Just Wondering what motor it is. I take it that the Name Plate is removed. Your first ideas of both Bus-Motorhome and Kombi are what's d...
by 7circle
Thu, 31 Jul 2014, 23:05
Forum: Electric motors and controllers
Topic: AC electric motor rewinding for EV use
Replies: 100
Views: 21438

AC electric motor rewinding for EV use

My motor was purchased from Jon, yeah. 48vac @50hz. I'm told it's rated for 200a continuous current, so 3x current overload shouldn't be outrageous. There are LOTS of parallel conductors per phase. I will have an electric fan on it, so not relying on the integral fan. I've considered putting a wate...
by 7circle
Thu, 31 Jul 2014, 06:14
Forum: The Lounge
Topic: What have I done????
Replies: 36
Views: 4628

What have I done????

Sorry it was Coulomb not Weber... Image
Too hard to edit last post. with hypertext mixups.
7c
by 7circle
Thu, 31 Jul 2014, 06:07
Forum: The Lounge
Topic: What have I done????
Replies: 36
Views: 4628

What have I done????

I did a search for images "induction motor torque vfd" on google and the best one was by Weber. Here's the post it was linked to. After much hunting, I found the image you posted, I'm sorry I put you to all that trouble. These graphs are used for DOL start-ups. As EV's are VFD style the graphs don't...
by 7circle
Thu, 31 Jul 2014, 02:15
Forum: The Lounge
Topic: What have I done????
Replies: 36
Views: 4628

What have I done????

I had another look at the specs 7 circles posted http://www.rmsindustrial.com.au/image/data/wegw22/9r24pfoot.pdf and according to page 4 the torque curve seems to peak at around 75% of max speed and by 80% it's going into free fall. If 5,800rpm is around 75% max speed that would mean the motor shou...
by 7circle
Wed, 30 Jul 2014, 03:35
Forum: The Lounge
Topic: What have I done????
Replies: 36
Views: 4628

What have I done????

The Beast's website says
... "Servo for synchronous permanent magnet motors / brushless servo motors"
So the emerson / control-techniques site says so and in the pdf broxhure.

Just depends on how you think the Kombi and the bus would best be suited say mechanically.
by 7circle
Tue, 29 Jul 2014, 03:15
Forum: The Lounge
Topic: What have I done????
Replies: 36
Views: 4628

What have I done????

Don't mean to side track you with Lower Volts and such. I had written a post but the "Post Ghost" vapourized from my screen. So .. Emergency allows a crawl mode for a big 90kW robot with 220kVA peak to be taught/trained/educated by its programmers at say 5 to 40kW. It is lower power that can be cons...
by 7circle
Mon, 28 Jul 2014, 23:51
Forum: The Lounge
Topic: What have I done????
Replies: 36
Views: 4628

What have I done????

The "Beast" requires a min of 425vdc to play the game. ... But in the Beast 4sale thread ... Wow - here's another gem in "the Beast". Essentially, if you provide 24 VDC for control and 36 to 96VDC for power, you can run it in emergency low-voltage mode. Great for testing. 4.6 Low voltage DC power s...
by 7circle
Mon, 28 Jul 2014, 23:40
Forum: The Lounge
Topic: What have I done????
Replies: 36
Views: 4628

What have I done????

... Nom torque 59.8Nm at 17.2A with 415 @50Hz ... ... ummm.... http://forums.aeva.asn.au/smileys/smiley5.gif What relationship does the 415v @ 50HZ have with the 48v rewind driven by the "Beast" VFD and a 450VDC nom. battery pack? Do the figures remain the same, just the rpm changes or is there a w...
by 7circle
Mon, 28 Jul 2014, 11:24
Forum: The Lounge
Topic: What have I done????
Replies: 36
Views: 4628

What have I done????

Just did a google on 9.2kW 4 pole WEG and got hit at RMS Industrial in Aus. 132M/L 9.2kW 4p http://www.rmsindustrial.com.au/image/data/wegw22/9r24pfoot.pdf Nom torque 59.8Nm at 17.2A with 415 @50Hz 82kg 1470 RPM 2%slip Looks sweet 390% Break-down Torque (.... 233Nm) and 310% locked rotor torque (......
by 7circle
Mon, 28 Jul 2014, 10:53
Forum: The Lounge
Topic: What have I done????
Replies: 36
Views: 4628

What have I done????

.... Just help with identifying what the bits are, this is the link to the motor I bought from Big Mouse http://forums.aeva.asn.au/viewtopic.php?title=eoi-catavolt-custom-induction-motor-and-core&t=4135 and the controller http://forums.aeva.asn.au/viewtopic.php?title=for-sale-the-beast-220-kva-vfd-...
by 7circle
Mon, 30 Jun 2014, 09:04
Forum: Mitsubishi
Topic: Imiev measured data
Replies: 506
Views: 40776

Imiev measured data

Could the display segments be measures of Ah not wh?
by 7circle
Mon, 23 Jun 2014, 08:04
Forum: Members Machines
Topic: Weber and Coulomb's MX-5
Replies: 1698
Views: 334166

Weber and Coulomb's MX-5

.... lost my reply... try again but brief... Would you like more longnitudinal strength in chassis? Like the kits you linked to showed. Your Butterfly Brace looks sweet. Not too heavy. erhh .. debounce .. why not just beef up RC filter on pins? A port pin read ... then a second port pin read ... doe...
by 7circle
Thu, 12 Jun 2014, 04:56
Forum: Members Machines
Topic: Voltron-Evo; jonescg's new electric race bike
Replies: 291
Views: 46839

Voltron-Evo; jonescg's new electric race bike

Just wondering... With field weakening of this PM motor... Say you get the revs up to 5000 rpm and the controller goes to a fault state. In fault state it is no longer controlling the 6 pulse bridge for motor current field weakening. So will the Motor Bemf Voltage increase up to meet th Kv relations...
by 7circle
Sat, 31 May 2014, 17:32
Forum: EV Motoring
Topic: Tesla Model S production line
Replies: 24
Views: 2589

Tesla Model S production line

Top News.
If the cost of a grid interactive smart charger was viable you could go out and collect ernergy and off load it when you get home. 85kWh would leave more than 60kWh to play with if there was a free super charger from tesla with in 100km.

Hope the wait isn't too agonising.

7c
by 7circle
Fri, 23 May 2014, 07:46
Forum: EV Motoring
Topic: Toyota to go the Hydrogen route
Replies: 28
Views: 3269

Toyota to go the Hydrogen route

Came across a techie amtuer web page on fuel cell info [url=http://twinkle_toes_engineering.home.comcast.net/~twinkle_toes_engineering/hydrogen_car.htm]http://twinkle_toes_engineering.home.comcast.net/~twinkle_toes_engineering/hydrogen_car.htm[/url] Also Hyundai have a comparison of CO2 emissions so...
by 7circle
Fri, 23 May 2014, 04:11
Forum: Admin Notices
Topic: Forum integration with the main site
Replies: 133
Views: 18387

Forum integration with the main site

Just a comment on Discourse Forum engine. My smartphone Android 2.7 is not supported. So looked up what is: https://github.com/discourse/discourse/blob/master/README.md Discourse is built for the next 10 years of the Internet, so our requirements are high: Browsers Tablets Smartphones Safari 5.1+ iP...