Search found 40 matches

by microman
Tue Apr 14, 2009 7:40 pm
Forum: All things battery related
Topic: Dumb charging idea?
Replies: 7
Views: 7763

The short answer is yes - its pretty dumb! The output of a simple rectifier without any smoothing is not dc - it has a lot of ripple voltage going from 0 to the peak of the input. The peak voltage of the 230V rms mains is about 325V, so you need to consider what will limit the peak current into the ...
by microman
Sat Apr 11, 2009 3:44 pm
Forum: Hot off the press....
Topic: Mitsubishi iMEV
Replies: 4
Views: 4160

UK price seems to be anybody's guess at present. Somewhere between £12.5k and £25k. I doubt the former and hope not the latter.
by microman
Thu Apr 09, 2009 4:38 pm
Forum: Hot off the press....
Topic: Mitsubishi iMEV
Replies: 4
Views: 4160

Mitsubishi iMEV

A favourable review from an reliable source of the iMeV. Unanswered questions are when and how much in the UK. I'm waiting!

http://tinyurl.com/dkre4b
by microman
Sun Mar 29, 2009 3:48 pm
Forum: Electric Motor Bikes
Topic: OK to paint the controller black?
Replies: 4
Views: 5928

Yes, in the sun black (and any colour) will absorb heat. So overall you'd probably be better off leaving it shiny aluminium and relying on conduction to the ambient air - that's what the fins are for. Unless the surface is very hot the major heat loss is conduction and not radiation especially when ...
by microman
Sat Mar 28, 2009 3:55 pm
Forum: Electric Motor Bikes
Topic: OK to paint the controller black?
Replies: 4
Views: 5928

Perhaps, depending on the shade, but not as high as a true black body radiator which has an emissivity of unity. So matt black (a non colour) is usually better than anything else which is why most heat sinks are anodised or painted black.
by microman
Wed Mar 25, 2009 4:02 pm
Forum: Electrically assisted bikes
Topic: Lard Removal
Replies: 18
Views: 12796

When all else fails there's always brute force!

retepsnikrep: The kit illustration on his site definitely shows the 3 phase wires and the four sense wires like mine. And the controller is quite well sealed.
by microman
Tue Mar 24, 2009 2:15 pm
Forum: Electrically assisted bikes
Topic: Lard Removal
Replies: 18
Views: 12796

Unless the kit differs from my complete bike, its a brushless motor. So you can't bypass the controller, though you can bypass the speed control resistor. However mine's already screwed up to the limit to get the legal maximum of 15mph. My controller seems to limit the current to 12A not the 15A he ...
by microman
Fri Mar 13, 2009 7:57 am
Forum: Electrically assisted bikes
Topic: Lard Removal
Replies: 18
Views: 12796

I bought the Cruiser (top centre picture on his home page) from him last year with the 10AHr pack complete for £520. Some quality issues with the controller box and I had to screw the preset up to get the right speed. The supplied controller hard limits at a little over 10A so hill climbing is no...
by microman
Thu Feb 19, 2009 2:30 pm
Forum: Home Energy Area
Topic: Solar PV array prices in 2009
Replies: 14
Views: 24928

I had a professional quote for £9000! It might have saved me £80 - £100 a year at best. I just laughed (quietly).
by microman
Thu Feb 19, 2009 2:27 pm
Forum: Electric Motor Bikes
Topic: New Electric Scooter in the UK with lithium for under 1000 ?
Replies: 8
Views: 7582

Prices from £1195. Lithium is extra - price on application. 6 weeks delivery (ie shipping from China).

They seem to be new. I might go up and have a look sometime - assuming that they actually have any.

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