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by jonescg
Thu, 20 Jun 2013, 16:35
Forum: Members Machines
Topic: Johny's Electric Vogue
Replies: 287
Views: 44147

Johny's Electric Vogue

I need a Peltier Effect electric blanket. One which cools in the long Perth summer Image
by jonescg
Wed, 19 Jun 2013, 18:13
Forum: Members Machines
Topic: Johny's Electric Vogue
Replies: 287
Views: 44147

Johny's Electric Vogue

You could sit your packs on an electric blanket... In some ways we live in a unique climate. Our winters are cool but not cold, and out summers are hot. So we need cells which can work in a big range of temperatures. setting up a cell heating system would be useful for about 3 months of the year, wh...
by jonescg
Wed, 19 Jun 2013, 16:41
Forum: Electric motors and controllers
Topic: New range of AC motors now at evworks
Replies: 8
Views: 1886

New range of AC motors now at evworks

I was being a little facetious http://forums.aeva.asn.au/smileys/smiley2.gif , but yeah, AC motors are the cheap bit. It's the inverters that let you down. Induction motors are getting into the 2-3 kw/kg constant power range, which is pretty close to the PMAC range. They are still rather large thoug...
by jonescg
Wed, 19 Jun 2013, 05:26
Forum: Electric motors and controllers
Topic: New range of AC motors now at evworks
Replies: 8
Views: 1886

New range of AC motors now at evworks

http://www.evworks.com.au/index.php?pro ... T-HPE-AC75

I'm happy with my motor that cost twice as much, weighs half as much and puts out 3 times the power and torque. But yeah, great to see the AC evolution :D
by jonescg
Mon, 17 Jun 2013, 04:46
Forum: Members Machines
Topic: Ohmboy distance test
Replies: 7
Views: 1450

Ohmboy distance test

All but one of those numbers are good, Mark. A little disappointing on the range, but then again the aerodynamics of a van aren't the best. Great that everything keeps it's cool. Keen to know the 100 km/h range!
by jonescg
Sun, 16 Jun 2013, 18:36
Forum: General EV Discussion
Topic: Sae combo includes j1772 or mennekes on top
Replies: 3
Views: 1168

Sae combo includes j1772 or mennekes on top

That plug is enormous!
by jonescg
Sat, 15 Jun 2013, 16:03
Forum: Technical and conversion discussion
Topic: Required qualifications for EV installation work
Replies: 8
Views: 1804

Required qualifications for EV installation work

I think the proverbial hits the fan if someone has an accident which can be traced back to poor workmanship on their vehicle. If the mechanic was not suitably qualified and recognised by the MTA as an authorised mechanic, your business is liable. Apprentices are covered under the arrangement, provi...
by jonescg
Sat, 15 Jun 2013, 06:41
Forum: Technical and conversion discussion
Topic: Required qualifications for EV installation work
Replies: 8
Views: 1804

Required qualifications for EV installation work

There is still the issue of working on an auto mobile. If you do paid work on someone's car as a registered business, qualifications such as auto electrician or mechanic are expected. I think provided at least one person at the business has a qualification recognised by the MTA and they oversee all ...
by jonescg
Sat, 15 Jun 2013, 01:52
Forum: Technical and conversion discussion
Topic: 70mm^2 Shielded Cable
Replies: 6
Views: 1829

70mm^2 Shielded Cable

Ditto, but for 42-50 mm2 cable. There is a good chance that at 600 V, there will be plenty of noise coming from the VFD Image
by jonescg
Fri, 14 Jun 2013, 05:00
Forum: Members Machines
Topic: Voltron-Evo; jonescg's new electric race bike
Replies: 291
Views: 52267

Voltron-Evo; jonescg's new electric race bike

Hi Glenn! The guys who are building my frame build race bikes for a living. They know geometry and clearance, dampening, spring rate and rebound like making breakfast. So I have confidence in them. They borrowed several parameters form a GSXR1000, which is a good starting point. I did consider getti...
by jonescg
Tue, 11 Jun 2013, 06:40
Forum: Members Machines
Topic: gholm's Morris J2 Van- 1966
Replies: 187
Views: 52157

gholm's Morris J2 Van- 1966

No worries; I got 4 PCBs on the way anyway. It fits inside an Altronics 220 mm by 165 mm ABS box. The tooling cost was $90 and the boards themselves are like $5 each. So there are 3 spares Image
by jonescg
Tue, 11 Jun 2013, 04:27
Forum: AEVA WA Branch
Topic: Perth Branch meeting tonight!
Replies: 5
Views: 1179

Perth Branch meeting tonight!

Bump!
Meeting Tuesday night, 11th of June!

The Perth branch AEVA meeting will be held at Curtin University Physical Sciences Building tomorrow night at 7 pm.

Hope to see you there!
by jonescg
Sun, 09 Jun 2013, 06:11
Forum: Members Machines
Topic: Weber and Coulomb's MX-5
Replies: 1698
Views: 369688

Weber and Coulomb's MX-5

To save me reading through the thread again, how are you connecting the pot of the DC motor controller to the steering such that it powers up when you turn the wheel?

by jonescg
Wed, 05 Jun 2013, 16:32
Forum: Electric motors and controllers
Topic: Solid copper rotors in AC induction motors
Replies: 15
Views: 2622

Solid copper rotors in AC induction motors

Great ideas Coulomb. I got the inspiration for the rotating magnetic field by the Lenz effect - you know, dragging a strong magnet past a copper bar and feeling the bar get dragged along with it. If you can drag the copper along with a magnet, then you can turn this into a rotating force. Then the n...
by jonescg
Wed, 05 Jun 2013, 05:23
Forum: Electric motors and controllers
Topic: Solid copper rotors in AC induction motors
Replies: 15
Views: 2622

Solid copper rotors in AC induction motors

Oh it is absolutely to help me understand it as well as others. No better way to learn a concept than to teach it! I'm pretty thick, so I like to have lots of different experiences to really cement my understanding. I broadly understood the concept of an AC motor for many years, but it never really ...
by jonescg
Tue, 04 Jun 2013, 23:40
Forum: Electric motors and controllers
Topic: Solid copper rotors in AC induction motors
Replies: 15
Views: 2622

Solid copper rotors in AC induction motors

I popped into Lodestone Industries to enquire about magnets. I want to build a little demo motor with interchangable rotors and stators. The idea is to create a rotating magnetic field using a simple source - rotating magnets. So no, the stator won't be a stator, but the next step in the logic is to...
by jonescg
Mon, 03 Jun 2013, 18:37
Forum: Electric motors and controllers
Topic: Solid copper rotors in AC induction motors
Replies: 15
Views: 2622

Solid copper rotors in AC induction motors

That's what got me thinking about it. If you drag a strong magnet past a block of aluminium or copper you can feel it being dragged along. Now create a rotating magnetic field electrically and watch your tube of conductive rotor turn. I can see that a laminated rotor with a slight twist is going to ...
by jonescg
Mon, 03 Jun 2013, 03:18
Forum: Electric motors and controllers
Topic: Solid copper rotors in AC induction motors
Replies: 15
Views: 2622

Solid copper rotors in AC induction motors

Nicely put! Thanks!

Now if someone could come up with an axial flux induction motor... that isn't in prototype stage Image
by jonescg
Mon, 03 Jun 2013, 00:52
Forum: Members Machines
Topic: gholm's Morris J2 Van- 1966
Replies: 187
Views: 52157

gholm's Morris J2 Van- 1966

I have a board being made up which accommodates a gigavac contactor and shunt, and also includes precharge equipment and a voltage divider. You could choose the resistor values accordingly and have a divided 0-5 V being sent up to the front of the vehicle. Then you use this as a proxy for the high v...
by jonescg
Sun, 02 Jun 2013, 20:55
Forum: Electric motors and controllers
Topic: Solid copper rotors in AC induction motors
Replies: 15
Views: 2622

Solid copper rotors in AC induction motors

I've seen plenty of discussion on the interweb about solid copper rotors for induction motors. Now, when I read 'solid copper' I was expecting a length of copper tube with a wall thickness of say 20 mm and a shaft somehow supporting the tube about it's axis. A crude example of how this works is show...
by jonescg
Thu, 30 May 2013, 04:07
Forum: Members Machines
Topic: StudentEV's Daihatsu Conversion
Replies: 106
Views: 12061

StudentEV's Daihatsu Conversion

I had a Kelly 1200 A PMDC controller on Voltron 1, and it was plenty good. Smooth power delivery and capable of smoking motors without trying. I think the early ones had troubles, but the latest ones are pretty solid.
by jonescg
Tue, 28 May 2013, 00:00
Forum: Batteries, charging, management and monitoring
Topic: What an EVSE provides
Replies: 145
Views: 18176

What an EVSE provides

^^ We found that problem at the Electrikhana. There was a 32 A charge point outside the RAC Driving Centre... with a bloody Mennekes outlet. What does every production EV in Perth use? A J1772. That's OK, we have an EVSE which plugs into a 15 A GPO... Too bad there was no such GPO http://forums.aeva...
by jonescg
Mon, 27 May 2013, 19:34
Forum: Batteries, charging, management and monitoring
Topic: What an EVSE provides
Replies: 145
Views: 18176

What an EVSE provides

If EVs go around tripping circuits then it will be such bad PR. Don't you get it ? "those evil EVs shut down the power in my house" media field day. You will not always have the access to the circuit breaker to reset it, you may shut off some important equipment (maybe your computer while you are t...
by jonescg
Mon, 27 May 2013, 16:24
Forum: Batteries, charging, management and monitoring
Topic: What an EVSE provides
Replies: 145
Views: 18176

What an EVSE provides

Seems to me all of the 'safety' features of an EVSE can be put together with a Jaycar enclosure and a 15 A breaker. Which is currently the bare minimum for all household circuits anyway... Yeah, I'm with Webber on this. The EV is no different to any other 2200 W appliance. If you plug it into a GPO ...
by jonescg
Sun, 26 May 2013, 18:15
Forum: EV Motoring
Topic: Mini e in cold weather
Replies: 2
Views: 705

Mini e in cold weather

Some chemistries are more prone to higher IR in low temperatures. I know LiFePO4 is one of the better performers, and LiCo is one of the worst. LiMnO2 is actually very good in cold weather, but hopeless in hot weather (not a wise choice for Perth, but OK for Tassie).