Search found 290 matches

by Night Train
Thu Feb 02, 2012 5:58 pm
Forum: All things battery related
Topic: Battery pack - lead to lithium
Replies: 4
Views: 8529

Re: Battery pack - lead to lithium

I doubt the batteries are getting anything other then the 20A output charger plugging in each night. How would I set it to equalize? The truck weighs about 650kg and is then collecting a payload that gets to maybe 500-700kg. As it does collections it gets heavier as the pack gets weaker. I sat in th...
by Night Train
Thu Feb 02, 2012 10:23 am
Forum: All things battery related
Topic: Battery pack - lead to lithium
Replies: 4
Views: 8529

Battery pack - lead to lithium

I am working with a friend's EV. It is a warehouse type road legal truck running a 48V pack consisting of eight 175Ah 6V lead batteries. The current range is 3-4 miles at 15mph stop start use after an over night charge followed by another 3-4 miles after a 2 hour lunchtime charge. The pack is someti...
by Night Train
Sun Jan 29, 2012 10:47 am
Forum: Cars,Vans and other road vehicles
Topic: New UK designed electric van
Replies: 15
Views: 26719

Re: New UK designed electric van

Has anyone sucessfully dealt with Bluebird and bought a vehicle? My partner's employer had been trying to replace their existing vehicle and Bluebird had a suitable vehicle. However, from there onwards Bluebird couldn't get hteir act together to quote for the vehicle they offered nor provide the inf...
by Night Train
Wed Jan 18, 2012 11:23 pm
Forum: Conversions
Topic: AC DC?
Replies: 9
Views: 2365

Re: AC DC?

TTmartin wrote:T
The problem is there are not any motor / controllers of higher voltage than 96v in AC readily available for DIY projects.

That is one of the very best reasons for so many DIY cars having DC set ups.

There is this VW Passat though.
by Night Train
Tue Jan 17, 2012 11:44 am
Forum: Conversions
Topic: AC DC?
Replies: 9
Views: 2365

Re: AC DC?

In simple terms the power of a motor is in watts (or kilowatts). Volts x Amps = Watts Therefore to get the same power with a lower voltage you will need some more amps. That implies that a lower voltage battery pack will draw more current (amps) then a higher voltage pack. The controller will deal w...
by Night Train
Tue Jan 17, 2012 11:09 am
Forum: Conversions
Topic: Direct drive or transmission?
Replies: 9
Views: 2902

Re: Direct drive or transmission?

That makes life easier! :D You still need the magic number, if you decide to use the clutch, or a close approximation if you have direct drive. If you are going for direct drive then keep the clutch centre plate for the internal splines if you have it. You should be able to adapt it to a keyed taper...
by Night Train
Mon Jan 16, 2012 10:05 pm
Forum: Conversions
Topic: Direct drive or transmission?
Replies: 9
Views: 2902

Re: Direct drive or transmission?

Have you an affordable source for some high current, high voltage DPDT contactors, Peter?
The only ones I have are only 275A @30% duty, 120V and with 48V coils.

I could do with something that would managed 500-600A @70% duty, 144V and with 12v coils.
Failing that I will make a mechanical switch.
by Night Train
Sun Jan 15, 2012 5:26 pm
Forum: Conversions
Topic: AC DC?
Replies: 9
Views: 2365

Re: AC DC?

IIRC DC series motors suffer from back EMF requiring higher voltages to make them spin faster against a load.

AC motors rely on the frequency of the three phase supply to control their speed. Higher speed needs a higher frequency.
by Night Train
Sun Jan 15, 2012 5:24 pm
Forum: Conversions
Topic: Direct drive or transmission?
Replies: 9
Views: 2902

Re: Direct drive or transmission?

Do you need to keep the four wheel drive? It is easier to just make an adaptor to fit the motor to the bell housing of the transmission. Before you order your motor though measure the available radius from the centre of the input shaft. You will need to clear the body of the transmission housing and...
by Night Train
Mon Jan 09, 2012 10:37 pm
Forum: Conversions
Topic: Audi TT conversion
Replies: 7
Views: 2041

Re: Audi TT conversion

In my opinion production cars do tend to use AC as it is the better system for a manufacturer to go for. They have the resources to develop suitable controllers, motors and transmissions to make a whole vehicle effective. Also they want to have easy regen to, on paper, improve the range. I have read...

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