Search found 3722 matches

by Johny
Tue, 29 Jul 2008, 04:57
Forum: Batteries, charging, management and monitoring
Topic: Hi Power Batteries
Replies: 53
Views: 9492

Hi Power Batteries

The max RPM of the CMG motors is also 4000. I would have thought the Cortina diff was around 4:1 similar to mine, 3.89:1.
by Johny
Mon, 28 Jul 2008, 21:28
Forum: Batteries, charging, management and monitoring
Topic: Hi Power Batteries
Replies: 53
Views: 9492

Hi Power Batteries

Sorry, wasn't having dig at the Cortina front end. 1965 Cortina was my first car.
by Johny
Mon, 28 Jul 2008, 21:25
Forum: Batteries, charging, management and monitoring
Topic: Hi Power Batteries
Replies: 53
Views: 9492

Hi Power Batteries

I was worried about the back seats because of what i've read on these forums and the other half saying "no back seats, no EV!". Reading regs very carefully it just means I have to get engineering check on suspension. 1965 Humber Vogue should be up for it. I recently redid the whole front end in new ...
by Johny
Mon, 28 Jul 2008, 19:45
Forum: Batteries, charging, management and monitoring
Topic: Hi Power Batteries
Replies: 53
Views: 9492

Hi Power Batteries

Woody, by the way , looking back through this thread I notice that you were concerned about motor weight. The motor I've chosen is a CMG 11kW "high power rating" which makes it an 12kW and only weighs 61kG in a 132M frame (smaller then Tuarn's 160 frame. It's an unusual size and only CMG and ABB (AS...
by Johny
Mon, 28 Jul 2008, 19:29
Forum: Batteries, charging, management and monitoring
Topic: Hi Power Batteries
Replies: 53
Views: 9492

Hi Power Batteries

Hi Woody Now you have made me look a tad further than my nose I see minimum voltage recommendations for LifPo4 of anywhere between 2.2 and 2.5 volts. I figure they were pretty much flat at 2.5/cell hence the 180. The large voltage range for Lithium from fully charged to flat-ish also may be a proble...
by Johny
Sun, 27 Jul 2008, 00:19
Forum: Batteries, charging, management and monitoring
Topic: Hi Power Batteries
Replies: 53
Views: 9492

Hi Power Batteries

Do you need 200? I was figuring on 180 at 3.2V = 576V. At 3V per cell we get 540 which the VSD is still happy with. I guess it depends how the regen braking control works in the VSD on how much voltage you can drop to. I am currently favoring a chinese drive with adjustable voltage limit. I'll post ...
by Johny
Wed, 16 Jul 2008, 22:55
Forum: Technical and conversion discussion
Topic: Regenerative braking
Replies: 55
Views: 12294

Regenerative braking

I just put an Allen Bradley 60HP drive in new eBay finds. Local pick-up from Michigan USA. It's a tad big though.
by Johny
Wed, 16 Jul 2008, 04:17
Forum: Technical and conversion discussion
Topic: Regenerative braking
Replies: 55
Views: 12294

Regenerative braking

Using the down ramp may be fraught. What happens if you are into down ramping and you wish to stop more suddenly. Doesn't the drive then consider that it is slowing down too much and poor power back in? The up/down ramps are there for process control and our application has a truck-load of inertia a...
by Johny
Tue, 15 Jul 2008, 23:20
Forum: Technical and conversion discussion
Topic: Regenerative braking
Replies: 55
Views: 12294

Regenerative braking

Sorry, I didn't consider the Motor wasn't 'pure' DC. Good point. Most controller circuits I've seen have the Caps from +ve to centre and -ve to centre with about 7200uF. Either way these will be expensive as they have to withstand high ripple currents and from what I've seen they are special purpose...
by Johny
Tue, 15 Jul 2008, 20:24
Forum: Technical and conversion discussion
Topic: Regenerative braking
Replies: 55
Views: 12294

Regenerative braking

Oh, I forgot to add this. While searching eBay for high voltage electrolytic capacitors I was awakened to the folly of what I was doing (even considering 2nd hand) when I read as part of the description on some:
# ALL ROLL BACKWARDS AS WELL AS FORWARDS
by Johny
Tue, 15 Jul 2008, 20:18
Forum: Technical and conversion discussion
Topic: Regenerative braking
Replies: 55
Views: 12294

Regenerative braking

Thanks Tuarn. I know that you have ironed out your controller issues but for lots of us on a rigid budget the following may be interesting. I have priced 1200V 100A (continuous, 200A transient) IGBT at around $80-100 per high side/low side pair - so about $300 (with the braking IGBT thrown in). Gate...
by Johny
Tue, 15 Jul 2008, 16:08
Forum: Technical and conversion discussion
Topic: Regenerative braking
Replies: 55
Views: 12294

Regenerative braking

Tuarn and/or anyone else running industrial AC controllers.
What temperature is the controller getting to when under a reasonable amount of stress. I.e. Is the controller over, under or just-right heat sunk for auto applications?
Thanks
by Johny
Sat, 12 Jul 2008, 03:37
Forum: Technical and conversion discussion
Topic: Regenerative braking
Replies: 55
Views: 12294

Regenerative braking

Hi guys I also contacted Danfoss Melbourne and got a cold reception and a price of $6800 for the 'obsolete' drive. Best solid price so far is (All 37kW or 50HP): · WEG CFW 09 High Torque Vector Drive 37KW Variable Torque – suited pumps & fan ect              $2814 +gst ($AU) · WEG CFW 09 High Torque...
by Johny
Fri, 11 Jul 2008, 15:51
Forum: Technical and conversion discussion
Topic: Regenerative braking
Replies: 55
Views: 12294

Regenerative braking

I have been chasing controller prices and am astounded at the prices. Generally over $6000. There has been one lower price response at $2800 for a WEG CFW 09 so that's my backup for now. While I wait for my lotto win or another one to come up on eBay I have been checking out the possibility of a DI...
by Johny
Mon, 07 Jul 2008, 23:24
Forum: Batteries, charging, management and monitoring
Topic: Greensaver 20Ah battery test results
Replies: 13
Views: 3503

Greensaver 20Ah battery test results

Mal, I found this article which tends to support your findings (and their claims).
Do you have an idea of price if landed in bulk?
by Johny
Fri, 04 Jul 2008, 22:20
Forum: General EV Discussion
Topic: Direct drive points.
Replies: 13
Views: 1444

Direct drive points.

The mind boggles at the idea of 2 AC motors with the drive controllers sharing a common DC bus. As you turn a corner you would experience perhaps the worlds first electronic differential as the outer motor powered the inner motor.
by Johny
Fri, 04 Jul 2008, 16:02
Forum: Technical and conversion discussion
Topic: Regenerative braking
Replies: 55
Views: 12294

Regenerative braking

Thanks guys I'm glad to here that I'm not alone in the tail shaft fiddle. There are enough split tail shaft vehicles out there so I should be able to adapt something. Thanks for the drive/motor description Tuarn. It looks like I have to be a bit careful which motor. Among the new ABB motors there is...
by Johny
Fri, 04 Jul 2008, 04:47
Forum: Technical and conversion discussion
Topic: Regenerative braking
Replies: 55
Views: 12294

Regenerative braking

Hi Tuarn I have visited your evalbum page many times over the last month and I must admit your were the person who switched on the light re AC industrial drive and 3 phase motor etc. with me. It would make it heaps easier if I had a spline on the motor but I would need some method of lubricating it ...
by Johny
Thu, 03 Jul 2008, 23:14
Forum: Technical and conversion discussion
Topic: Regenerative braking
Replies: 55
Views: 12294

Regenerative braking

Has anyone direct coupled an AC motor to a tailshaft yet?
I have a problem with mating a slip-yoke on the tail shaft to the motor drive shaft.
Any ideas?
John
by Johny
Thu, 03 Jul 2008, 22:45
Forum: Technical and conversion discussion
Topic: Compliance for pre-ADR cars
Replies: 7
Views: 1679

Compliance for pre-ADR cars

Hi Woody
I am really interested in what you find. My donor car is a 1965 Humber Vogue and the wife wants to keep the four seats.
John
by Johny
Thu, 03 Jul 2008, 21:02
Forum: Technical and conversion discussion
Topic: EV first timer
Replies: 5
Views: 1434

EV first timer

Hi Riverend Your CMG Motor sounds perfect. That's the way I have decided to go after much fluffing around with looking at DC motors and controllers and getting thoroughly disheartened. You wouldn't have the odd 11kW 4 pole aluminium frame SLA kicking around would you. I am trying to get new prices a...