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The advantages of electric vehicles (EVs) are well-known: nonpolluting operation, a renewable power source, safety, and low cost of operation. The disadvantages include limitations on speed, operating range, and convenience as well as the high cost of converting existing vehicles to electric operation; while acknowledging such other disadvantages as lack of effective heating, air conditioning, and power steering, EV advocate Brant says some of the best-known ones are myths. Speed, for instance, is related to body weight, and less weight means more speed. (Weight is, however, also a factor in safety: lighter weight often means less safety, especially in collisions, and Brant doesn't mention the collision factor.) Brant provides comprehensive instruction in converting a vehicle to electric power.
So we will make my own and control it with a micro processer. A PIC or ARV or AREM are what we think. but Which will be fast enough? we Want a fast acceleration so must have a fast micro pro cesser. Will a AREM acceleraet quickly or will a PIC be better?
We are serious and will be working withj hard work to progress this amazing project.
Good help will be treated well.
Your 'analyis' reminded me of being part of a team that built a Battlebot. We had 3 9-hp brushless DC motors in it running 130V at 800 Amps using LiIon batteries.
Charging was a "big ordeal" yet the only 'explosion' that occured was when an engineer cut the power lines at the same time. The wire-cutters detonated and it rained multen metal all over our machine. My face was a scant 2 feet from the detonation. I was unscathed, but Mr. Current Tester burned his hand fairly badly.
Ahh, those fond memories.
(My role was the DSP controller electronics and the firmware for controlling the motors from the R/C interface)
Mr. Current Tester was a veteran "HIGH-POWER" specialist who made a dumb mistake. It happens to the best of them.
--Cpt. Vince Foster 2nd Cannon Place Fort Marcy Park, VA
A photo of our battery pack (it was double-layered too): http://i.imgur.com/5WS3q.jpg
While I generally agree with all the previous posts, I still feel it's a worth while DIY project.
I suggest that the OP look into IGBT control circuits. IGBT devices, while a bit pricey, quickly move the high power control down to embedded logic levels.
Many IGBT devices have default current level controls. Some Tranzorbs, a few high power by-pass diodes and the "kick" Per mentions can be recovered to help re-charge the batteries.
To the OP.. always have your drive circuits default to the OFF levels. ANY loss of control should default to OFF everything!
Gasoline with it's wide explosion points is still one of the more dangerous items in the general public's hands. Bradford
Lithium batteries can turn pretty nasty...
Gasoline with it's wide explosion points is still one of the more dangerous items in the general public's hands.
Yeah, but people have been around it for long enough that general awareness of the safety implications in handling it is common knowledge. It even comes with a strong, easily recognized smell to warn people what they're dealing with.
High-energy electrical batteriess, like those needed to power a electrical or hybrid car, OTOH, are new to most people, and they don't deliver any warning people are likely to recognize in time to react. No smell, no sound. There's light and heat, but only when it's already too late. It'll take a whole new round of public education to make sure accidents stay at a tolerable level.
Generally speaking there can be no such thing as a completely safe replacement for gasoline. Whatever you use, its purpose is to contain a lot of energy in as little weight and volume as possible. It's quite inevitable that in case of an accident that energy will be liberated in an uncontrolled, dangerous manner.
"Yeah, but people have been around it for long enough that general awareness of the safety implications in handling it is common knowledge."
Insert a "some" somewhere in that sentence. People are still regularly trying to start fires with gasoline, failing to realize what happens if it is warn enough for the gasoline to mix with the air in suitable proportions...
And it isn't uncommon to read about people emptying their fuel tanks before trying to weld on the tank...
People are still regularly trying to start fires with gasoline, [...]
Well, there will be idiots. And let's face it, it wouldn't be fun if the Darwin Awards ever ran out of candidates, would it?
OTOH if you compare the amount of gasoline sold every day to the number and severity of accidents that it plays a leading role in, the numbers are pretty good. I bet some safety engineers would be very proud of themselves if they achieved that low an accident rate in their own work.
Money Maker.
Tesla IPO charges up by as much as 45%
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