Search found 90 matches

by Hemonster
Wed, 22 Apr 2009, 20:03
Forum: Batteries, charging, management and monitoring
Topic: Optimum China Batteries
Replies: 70
Views: 13591

Optimum China Batteries

Hey Woody, Have you progressed with this? I too will be interested if they do their own spot welding to make up the tabs ... the good thing with EVPST cells is that they have screw terminals and are prismatic. However the pricing here is cheaper than EVPST. Greensaver quoted to me USD$85 + USD$14 in...
by Hemonster
Wed, 22 Apr 2009, 19:57
Forum: Members Machines
Topic: Hemonster's ACIM conversion
Replies: 189
Views: 33825

Hemonster's ACIM conversion

Do you mean like a VCO that transmits at a different freq for each 48V module unto a single wire bus? ie. Each 48V module transmits using a different carrier frequency - using tuned LC filters on the receive side you can then decode what each of the modules is saying, even if they are all transmitti...
by Hemonster
Wed, 22 Apr 2009, 02:53
Forum: Members Machines
Topic: Hemonster's ACIM conversion
Replies: 189
Views: 33825

Hemonster's ACIM conversion

Hemonster, You did an awesome job of summarising that huge thread on AC motors. Now here's another one for you (not quite so long) on " To chassis-earth or not to chassis-earth? ". You've now committed me to more reading ... http://forums.aeva.asn.au/smileys/smiley36.gif , oh well I had to do it an...
by Hemonster
Wed, 22 Apr 2009, 02:45
Forum: Members Machines
Topic: Hemonster's ACIM conversion
Replies: 189
Views: 33825

Hemonster's ACIM conversion

acmotor wrote: ( I have also removed the VDR out of the DC-DC input stage as this could have a problem with the higher voltage.) Image


What is a VDR?

by Hemonster
Wed, 22 Apr 2009, 02:43
Forum: Members Machines
Topic: Hemonster's ACIM conversion
Replies: 189
Views: 33825

Hemonster's ACIM conversion

I'll actually consider a PWM-analogue solution with shift registers to implement a crude "addressing mechanism". Hmm ... interesting, can you expand on this idea for my clarity, or point me to the thread? Edit: oops, factor of 4 out. Each charger is about 300 W output, so up to 500 VA input; even 1...
by Hemonster
Wed, 22 Apr 2009, 02:33
Forum: Members Machines
Topic: Hemonster's ACIM conversion
Replies: 189
Views: 33825

Hemonster's ACIM conversion

Can you tell us a bit about the RVR? I don't think it's a model we see in Australia, at least by that name. What's the kerb weight? Is it a large 4WD? I imagine that you probably do have such a vehicle in Oz, here is a link for the one I'm potentially interested in. http://www.trademe.co.nz/Trade-M...
by Hemonster
Wed, 22 Apr 2009, 02:07
Forum: Members Machines
Topic: Hemonster's ACIM conversion
Replies: 189
Views: 33825

Hemonster's ACIM conversion

Ok, some pics here ... though picasa just make it so much easier ... a one by one uploader really can be made better... IMHO :) It has been an intrepid journey ... http://forums.aeva.asn.au/smileys/smiley36.gif http://forums.aeva.asn.au/uploads/624/IMG_6055.JPG http://forums.aeva.asn.au/uploads/624/...
by Hemonster
Mon, 20 Apr 2009, 19:36
Forum: Members Machines
Topic: Hemonster's ACIM conversion
Replies: 189
Views: 33825

Hemonster's ACIM conversion

Some photos of the project so far (still early days):
http://picasaweb.google.com/HemonDey/ACIMConversion#
by Hemonster
Mon, 20 Apr 2009, 19:04
Forum: Members Machines
Topic: Hemonster's ACIM conversion
Replies: 189
Views: 33825

Hemonster's ACIM conversion

Here is my what I'm planning to do: 1/ I managed to acquire a 2-pole 15kw Teco AC induction motor (near new) and a 15kw PDL VSD with vector drive all for not much more than ~NZD1200 all up. I thought the best way to learn is to jump into the deep end, so that's what I'm doing. The motor is rated at ...
by Hemonster
Mon, 20 Apr 2009, 18:29
Forum: Batteries, charging, management and monitoring
Topic: Battery paralleling circuit
Replies: 24
Views: 4251

Battery paralleling circuit

Hi Coulomb and ACmotor With regards to the diodes, aren't these going to prevent the chargers from sensing the cell voltage? Or is that that you are just using a constant voltage current limited PSU (ie. not smart chargers), and bump up the output voltage a bit to take into account the diode drop? (...
by Hemonster
Sun, 19 Apr 2009, 00:03
Forum: Members Machines
Topic: Hemonster's ACIM conversion
Replies: 189
Views: 33825

Hemonster's ACIM conversion

Hi all, I'm starting my conversion and have choosen to go the ACIM route, looking forward to it. Just wanted to know, has anybody given thought to a Mitsi RVR as a conversion? I was thinking the MPV characteristics with a flat deck at the back make it useful for placing batteries (esp green savers) ...
by Hemonster
Sat, 18 Apr 2009, 18:37
Forum: Electric motors and controllers
Topic: AC motors, multipoles, torque
Replies: 549
Views: 80358

AC motors, multipoles, torque

A wee bit OT,but not totally. Has anybody given thought to a Mitsi RVR as a conversion? I was thinking the it's MPV like characteristics with a flat deck at the back make it useful for placing batteries (esp green savers) - the spare tyre is on a rack at the back. It comes in 4WD which might make it...
by Hemonster
Fri, 17 Apr 2009, 13:34
Forum: Electric motors and controllers
Topic: AC motors, multipoles, torque
Replies: 549
Views: 80358

AC motors, multipoles, torque

coulomb wrote:
Our MX-5 1.6L engine was 125kg, not including radiator or alternator. And you will be adding several 100s of kg of batteries.


Was the engine cast iron or an alloy of some description? Being a sports car it might have a lighter engine compared the average ... I'm thinking.

by Hemonster
Fri, 17 Apr 2009, 02:46
Forum: Electric motors and controllers
Topic: AC motors, multipoles, torque
Replies: 549
Views: 80358

AC motors, multipoles, torque

All I can say is, WOW ... that was a long thread, took me about a week to get through it with my limited time table http://forums.aeva.asn.au/smileys/smiley1.gif Well done to all those who contributed, I'm in awe at the level of technical information that has been gatehered here. I've have been plan...