Search found 3668 matches

by Richo
Thu, 14 Aug 2008, 01:36
Forum: AEVA WA Branch
Topic: Introductions...?
Replies: 15
Views: 2915

Introductions...?

i'd personally like to hear more about how i could rig up a microwave transmitter and what that would achieve. That would achive a permanent communication link to the box with no wires. ie Proof that no power is going in i also don't think you need a research grant the size or CERN or NASA to work ...
by Richo
Thu, 14 Aug 2008, 01:12
Forum: Technical and conversion discussion
Topic: Regen, can someone help
Replies: 29
Views: 3521

Regen, can someone help

It amazes me the lengths people will go to get regen on DC. The mars PMAC with an AC/DC with DC-DC boost probably could do it. 120Vx50A=6kW. I'm not going to build such a system - your on your own. http://forums.aeva.asn.au/smileys/smiley8.gif With the towing idea - there are plenty of 4WD's around....
by Richo
Thu, 14 Aug 2008, 00:55
Forum: General EV Discussion
Topic: Industrial AC Controllers + Rated Torque/Power
Replies: 135
Views: 14710

Industrial AC Controllers + Rated Torque/Power

Yeah they have rules and regs to abide by.
Still no harm being more efficient in your eV as well.
by Richo
Thu, 14 Aug 2008, 00:47
Forum: General EV Discussion
Topic: BMW 318 conversion
Replies: 6
Views: 785

BMW 318 conversion

Hi Peter,

You may want to edit your post under "Post options" and edit your e-mail address to stop the chance of spam from bots. "pwilde at dodo dot com dot au".
Better to be safe than sorry.
by Richo
Wed, 13 Aug 2008, 06:55
Forum: General EV Discussion
Topic: Industrial AC Controllers + Rated Torque/Power
Replies: 135
Views: 14710

Industrial AC Controllers + Rated Torque/Power

Sorry even playing around with the numbers I can't get down to 10sec.
Seems to be around the 13-15 sec mark depending on other variables.
Should get under 100Wh/km@50kph.
by Richo
Wed, 13 Aug 2008, 06:20
Forum: General EV Discussion
Topic: Industrial AC Controllers + Rated Torque/Power
Replies: 135
Views: 14710

Industrial AC Controllers + Rated Torque/Power

weight, diff ratio and tyre size would be handy also.
by Richo
Wed, 13 Aug 2008, 05:22
Forum: General EV Discussion
Topic: BMW 318 conversion
Replies: 6
Views: 785

BMW 318 conversion

Welcome Peter.

Which model 318i were you hoping to convert E30/36?

Also a good place to start would be what kind of range and performance you want to get from your eV.
by Richo
Wed, 13 Aug 2008, 00:52
Forum: Technical and conversion discussion
Topic: Regen, can someone help
Replies: 29
Views: 3521

Regen, can someone help

antiscab wrote:60kmh in 1300kg is 502kj.
depleted over 6 seconds is 83.5kw.


oops:
100kmh(27.7m/s) in 1300kg is 502kJ
60kmh in 1300kg is 180kJ -> 30kW over 6 sec.


by Richo
Tue, 12 Aug 2008, 07:36
Forum: Batteries, charging, management and monitoring
Topic: Parellel vs Series
Replies: 7
Views: 1430

Parellel vs Series

most chinese scooters parrallel first, then series second. The chinese doing it one way doesn't give me any exta incentive to do it that way. And I'd probably question it as well. If you had suitable battery voltage and current monitoring then neither combination would matter. True - but I suspect ...
by Richo
Tue, 12 Aug 2008, 04:47
Forum: General EV Discussion
Topic: Industrial AC Controllers + Rated Torque/Power
Replies: 135
Views: 14710

Industrial AC Controllers + Rated Torque/Power

At the end of the day what performance were you hoping for?
Top speed x km/hr?
0-100km/hr in y seconds?
Operating efficiency z Wh/km @ z1 km/hr?

Sometimes it's better to look at the end game and work back...
by Richo
Tue, 12 Aug 2008, 04:07
Forum: Batteries, charging, management and monitoring
Topic: Parellel vs Series
Replies: 7
Views: 1430

Parellel vs Series

The best way is to make a series string to the desired voltage then parallel the top and bottom of the string with another string of batteries. Don't parallel individual batteries then make the string. Now if you have 8 x 6V12Ah batteries you could make: 48V12Ah (All 8 in series) 24V24Ah (2 strings ...
by Richo
Tue, 12 Aug 2008, 00:48
Forum: Batteries, charging, management and monitoring
Topic: Autospeed article
Replies: 4
Views: 946

Autospeed article

I feel the anger...

Do you have first hand TS cell failures?
by Richo
Tue, 12 Aug 2008, 00:37
Forum: Technical and conversion discussion
Topic: Reality check on motor/battery/donor combo please!
Replies: 13
Views: 5363

Reality check on motor/battery/donor combo please!

^ Listen to the man ^

If it fit's put it in.
by Richo
Mon, 11 Aug 2008, 23:51
Forum: General EV Discussion
Topic: Registering Twike in Australia?
Replies: 9
Views: 2222

Registering Twike in Australia?

same.

400kg trike with 11kW AC boo-yah.
by Richo
Mon, 11 Aug 2008, 23:25
Forum: General EV Discussion
Topic: Industrial AC Controllers + Rated Torque/Power
Replies: 135
Views: 14710

Industrial AC Controllers + Rated Torque/Power

The locked rotor current shouldn't be the same as the current used when at a certain slip that gives you the same torque output. http://forums.aeva.asn.au/smileys/smiley5.gif So 138Nm is unlikely to need 160A. The limiting factor will be the temp class and insulation class. Most motors avail are abo...
by Richo
Mon, 11 Aug 2008, 22:00
Forum: General EV Discussion
Topic: Industrial AC Controllers + Rated Torque/Power
Replies: 135
Views: 14710

Industrial AC Controllers + Rated Torque/Power

No - You just get more heat that the motor can't cope with.
218Nm in a Cortina not enough?!?
by Richo
Mon, 11 Aug 2008, 21:25
Forum: General EV Discussion
Topic: Industrial AC Controllers + Rated Torque/Power
Replies: 135
Views: 14710

Industrial AC Controllers + Rated Torque/Power

Below sync speed the limit will be the current->max torque Above sync speed the limit will be the continuous power/heat. If you read the spec for a motor it has a max torque usu 3x nominal.(Tm=3xTn) [at sync speed] After this I suspect bad things happen (heat in windings / magnetic saturation) Below...
by Richo
Mon, 11 Aug 2008, 21:14
Forum: Technical and conversion discussion
Topic: Reality check on motor/battery/donor combo please!
Replies: 13
Views: 5363

Reality check on motor/battery/donor combo please!

Impulse9 should have a better torque/amp ratio than the 6.7" motor.
I doubt the 6.7" would be grunty enough to get the performance you ask.
Go the 9".
by Richo
Mon, 11 Aug 2008, 07:27
Forum: General EV Discussion
Topic: Registering Twike in Australia?
Replies: 9
Views: 2222

Registering Twike in Australia?

Personally I'd rather convert one of these: Ding Bob Trike
The frame is made in Austrlia and is already certified.
Just put in the electric parts a nice fibreglass cover and go.

Better than sitting in a rice bubble...
by Richo
Mon, 11 Aug 2008, 03:19
Forum: AEVA WA Branch
Topic: Introductions...?
Replies: 15
Views: 2915

Introductions...?

antiscab wrote: this is a perpetual motion machine.


Still $100 of magnets is fun to play with Image
by Richo
Sun, 10 Aug 2008, 23:49
Forum: General EV Discussion
Topic: The electric car that nobody wants.
Replies: 14
Views: 2094

The electric car that nobody wants.

I guess some people are not born salesmen.
Looks like a neat job though.
by Richo
Sun, 10 Aug 2008, 23:33
Forum: AEVA WA Branch
Topic: Introductions...?
Replies: 15
Views: 2915

Introductions...?

I like the Australian version where they seem to be making money selling merchandise promoting thier vaporware.
by Richo
Sun, 10 Aug 2008, 08:55
Forum: AEVA WA Branch
Topic: Introductions...?
Replies: 15
Views: 2915

Introductions...?

Show me a magnet motor turning by itself (to destruction if need be) and I'll make any required electronics to harness that power.

You-Tube Close ups of a motor showing one end of the motor while the other end is being driven by a cordless drill don't count.
by Richo
Sun, 10 Aug 2008, 05:06
Forum: General EV Discussion
Topic: Regen for DC?
Replies: 62
Views: 4439

Regen for DC?

Pitty the Perendev Motors are so expensive. Australia is a great source of magnets and they will even custom make them to your design. Don't buy them overseas as the transport costs for magentic material is high. http://forums.aeva.asn.au/smileys/smiley36.gif http://forums.aeva.asn.au/smileys/smiley...
by Richo
Sun, 10 Aug 2008, 03:40
Forum: General EV Discussion
Topic: Powerex IGBT or similar models
Replies: 7
Views: 769

Powerex IGBT or similar models

True he did say 100A cont, 200W loss cont, my error. Image

Also Buck and boost chopper IGBT's have the diode built in.
(assuming that the configuration is correct for his application)