Search found 71 matches

by EV_dub
Thu Nov 17, 2011 8:59 pm
Forum: Cars,Vans and other road vehicles
Topic: PEEL TRIDENT EV
Replies: 1
Views: 8449

Re: PEEL TRIDENT EV

:lol:

BIGGEST EV GRIN EVER!!!

good work!
by EV_dub
Mon Nov 14, 2011 8:39 am
Forum: Home Energy Area
Topic: Off grid battery / lighting / lathe etc
Replies: 17
Views: 38291

Re: Off grid battery / lighting / lathe etc

[quote="RobSmith]
Hi Dave,
I did not understand the 'Upwards' and 'Downwards' parts.
Rob[/quote]

Upwards= increasing speed
downwards= reducing speed
by EV_dub
Sun Nov 13, 2011 10:34 pm
Forum: All things battery related
Topic: Saft Ni-Cd MRE battery reconditioning, (berlingo batts)
Replies: 18
Views: 22717

Re: Saft Ni-Cd MRE battery reconditioning, (berlingo batts)

Been out of the loop on this chat :oops: With Nicads, initially there is a huge number of very tiny crystals on the surface of the positive plate, but due to a gradual change in the nickel oxide/hydroxide crystal structure, (usualy from under discharging, "memory effect") these are gradua...
by EV_dub
Sun Nov 13, 2011 10:22 pm
Forum: All things battery related
Topic: Saft Ni-Cd MRE battery reconditioning, (berlingo batts)
Replies: 18
Views: 22717

Re: Saft Ni-Cd MRE battery reconditioning, (berlingo batts)

On the Berlingo, Does anyone know the minimum voltage at idle (no load) before the controller switches out?
by EV_dub
Sun Nov 13, 2011 10:36 am
Forum: Home Energy Area
Topic: Off grid battery / lighting / lathe etc
Replies: 17
Views: 38291

Re: Off grid battery / lighting / lathe etc

PWM might be an option but I am not sure how that works in practice as the ons/offs are at full current so I am not sure if you might get a lot of brush wear from thousands of full current ons/offs. I have not been able to find any info about it online. Another chap on DIY Electric car forum has th...
by EV_dub
Sat Nov 12, 2011 8:45 pm
Forum: Home Energy Area
Topic: Off grid battery / lighting / lathe etc
Replies: 17
Views: 38291

Re: Off grid battery / lighting / lathe etc

Is there a better way of controlling the motor as a resistor is just a small electric fire and would be using electricity I could do without it using. I shall just refresh my memory to remind myself what layout the armature and field windings are in.... I know one configuration allows it to rev to ...
by EV_dub
Sat Nov 12, 2011 6:37 pm
Forum: Home Energy Area
Topic: Off grid battery / lighting / lathe etc
Replies: 17
Views: 38291

Re: Off grid battery / lighting / lathe etc

You could just run a resistor in series with the motor for low gears and then using a relay to bypass this resistor for heavier loads or higher gears. This would also give you a more sft start. The resistor must be able to cope with the high current though!
by EV_dub
Sat Nov 12, 2011 6:03 pm
Forum: All things battery related
Topic: Saft Ni-Cd MRE battery reconditioning, (berlingo batts)
Replies: 18
Views: 22717

Re: Saft Ni-Cd MRE battery reconditioning, (berlingo batts)

Looks like one duff cell in each to me. Thats a similar result to a failing cell. Grumpy-b Its normal for Ni-cad cells to react like that. They will maintain a gradual decline in voltage and then suddenly drop. This is called the "knee" characteristic I know the minimum load voltage for t...
by EV_dub
Sat Nov 12, 2011 1:22 pm
Forum: All things battery related
Topic: Saft Ni-Cd MRE battery reconditioning, (berlingo batts)
Replies: 18
Views: 22717

Re: Saft Ni-Cd MRE battery reconditioning, (berlingo batts)

A quick update: Selected 3 batts within the same voltage range (6.8v) and carried out capacity test: 100amp load over 3 batts in parallel for approx 33amps on each starting voltage under load = 6.3volts After one hour under load= 6volts after 2hrs= 5.8volts under load 2.5 hrs = 5.5v under load 2hrs ...
by EV_dub
Fri Nov 11, 2011 2:14 pm
Forum: All things battery related
Topic: Saft Ni-Cd MRE battery reconditioning, (berlingo batts)
Replies: 18
Views: 22717

Re: Saft Ni-Cd MRE battery reconditioning, (berlingo batts)

Hi Tim, Well i'm no expert with Ni-Cads, althought I did a stint in the battery bay at work so I know a little. I'm a Mechanic for Flybe in Exeter. I know a couple of our guys looking for jobs with a Monarch, they must be paying better :) Whats your role, are you licenced? You must be an expert on e...

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