Search found 103 matches
- Mon Aug 18, 2008 11:10 pm
- Forum: General
- Topic: Lithium vs lead batteries
- Replies: 19
- Views: 43398
- Thu Jul 31, 2008 12:01 pm
- Forum: Cars,Vans and other road vehicles
- Topic: Lightest car to convert?
- Replies: 30
- Views: 70237
- Fri Jul 18, 2008 9:46 pm
- Forum: Hot off the press....
- Topic: BVS at the Green Power Corporate Challenge
- Replies: 21
- Views: 43296
- Wed Jul 09, 2008 3:54 pm
- Forum: Home Energy Area
- Topic: induction motor as generator
- Replies: 9
- Views: 49227
I know the Nuvinci CVT are being sold into windmill applications - seems like a good idea. Actually the slip principle works in generation too, so to get 50Hz out of the induction motor as a 'generator' you have to put more than 1500/3000 revs in. We use this principle to make cheap regenerating loa...
- Wed Jul 09, 2008 3:44 pm
- Forum: Home Energy Area
- Topic: Solar hot water pumps, - PV array sizing & BLDC pump
- Replies: 5
- Views: 38760
Hi Malcolm The pump runs from a nominal 12V DC - it has internal electronics to do the commutating. It's a cheap 12V pump from ebay intended for automotive use. It is just stuck straight across the PV array. The array output can go up to 17V on load I think, but car stuff is designed for 14.4V conti...
- Wed Jul 02, 2008 9:49 pm
- Forum: Home Energy Area
- Topic: Solar hot water pumps, - PV array sizing & BLDC pump
- Replies: 5
- Views: 38760
- Mon Jun 23, 2008 12:29 pm
- Forum: Home Energy Area
- Topic: Solar hot water pumps, - PV array sizing & BLDC pump
- Replies: 5
- Views: 38760
Solar hot water pumps, - PV array sizing & BLDC pump
A colleague at work has put a PV powered electric pump on his roof mounted solar heating array. From ebay he got an array of parts including a small BLDC pump and a £50 PV array (12W). It didn't work - the array voltage just collapsed with the pump wired in. He was going to buy a bigger PV array,...
- Fri Jun 20, 2008 12:30 pm
- Forum: General
- Topic: Electrical Vehicle Campaign
- Replies: 30
- Views: 58023
Quite a few interesting points arising. The geek/nerd thing - the ones that use that sort of term as abuse are the ones who still expect you to fix their computer for them. So I reckon it's a reaction to their own feeling of inferiority due to their own stupidity or sloth. At school the term of abus...
- Fri Jun 13, 2008 12:17 pm
- Forum: Cars,Vans and other road vehicles
- Topic: AC motor/controller sources
- Replies: 9
- Views: 23020
Tests on rewound motor, looking at off load power loss and motor current 3rd harmonic, both of these jump up at 60Vrms(line-line) so that gives me 2 independent pointers at a suitable magnetisation current. Windings resistance, per phase, is 37 milliohm (star connection). That should be enough for m...
- Fri Jun 06, 2008 3:16 pm
- Forum: BMS thread
- Topic: Old BMS General Thread
- Replies: 658
- Views: 1261958