AEVA Forums

I may be wrong but my understanding of it was that supercapacitors / ultracapacitors can store enough charge to take care of peaks/transients and allow the battery to be used at much lower discharge rates and more continuously which lengthens the life of the battery significantly, CSIRO had worked o...

second law of thermodynamics begins with `in a closed system...' the bit everyone forgets about. There is no such thing as a closed system, it is at best a special case. Over unity only means there is an energy input from a source not accounted for in the experiment. for instance the Adam's motor wa...

This is something that I had thought of ages ago, well explained. I wonder if it could be as simple as driving 3 coils in a four coil motor and using one to charge.

http://www.davidicke.com/forum/showthread.php?t=159243

I am now considering moving my hydraulic regen from the range extending trailer to the front shaft on the motor in the car as I have nothing on it at present having crippled the power steering and made it manual and I will probably like it when I am doing short trips too, lots of hills around here s...

http://www.battery-solutions.basf.com/p02/USWeb-Internet/battery_solutions/en_GB/ details various BASF work this is a good overview of a few of the different approaches being worked on; http://www.popularmechanics.com/cars/news/fuel-economy/8-potential-ev-and-hybrid-battery-breakthroughs#slide-1 The...

supercapacitors made of graphene, looks like absolutely everything will be made of the stuff soon.

The Agni R series are reinforced so rev out to 6000 rpm instead of 4000 and 30kW over 22kW peak and all of their motors have the upgraded design Cedric planned for the E-tek/Mars/LMC motors (before he got shafted) providing higher torque per amp and a speed per volt making the gear reduction ratio ...

It has been frustrating getting any answers to price inquiries but Agni at $3000 (800 freight) for two 95R motors which would be ok for a lightweight car are the best so far and they have prototyped and tested their soon to be released 300mm high torque version. Waiting to see. http://www.gkn.com/dr...

To my mind AC or DC is less appealing than a big axial flux PMDC for the following reasons; -mostly the weight savings -overclockable to not need reduction in the drive train thus even more efficient and light -much less back emf so high speed is good -simpler -smaller -cheaper -DIY capable, both co...

The relay won't work if there is a 12V supply or other wiring fault which worries me a bit. I kind of like the mechanical switch as a surety.

It also occurred to me that a permanent magnet dc motor with suitable overclocking could get 10 times the torque with no reduction drive at all but a pretty large diameter might be needed. I would have to build them myself it seems but it is possible and not overly hard. Getting the right magnets is...

hydraulic regen is twice as efficient, 80% vs 40% and very simple, motor and pump is one unit, pumps against an accumulator, drives from it back to the reserve tank. I got a suitable gear pump for 80 bucks on ebay. Hoses and fittings cost a lot but a friend has the gear to make them (works on heavy ...

What aircraft motor generators? Wattage? The only trouble with NiCad is the possibility of contaminating your neighborhood in case of fire with cadmium. I don't know of anywhere that recycles them, does anyone? They are meant to be good for around 25 years. I know someone who has bigger cell blocks ...

I have been working on the hydraulic regeneration side of the range extending trailer idea today, sizing pulleys and magnetic clutches from AC units for the generator set too, I need two stages of reduction it seems but i haven't given up nutting it out further yet and found a very large pulley but...

Here is one of those little lightweight trailers in fiberglass mentioned at a $600 asking price it seems great. I wanted to be able to sleep in mine but this looks ideal for a range extender, it is even streamlined ok. http://www.ebay.com.au/itm/221152532597?nma=true&si=w0qIjH%2FuC%2BqqMX3qlOPRVpVJL...

How much?

A two speed box & differential sounds like a good drop in replacement for the 924 transaxle, I would be keen to hear how it goes, sounds great. The infinite ratio torque converter would allow a much weaker/smaller motor and it isn't any more complex than a diff/box to make by the looks of it, ask yo...

Cool planetary drives want the other 8? (minimum order of ten, not sure how much $ the ones we might require would be) but a great find, ones I have found have all been quite expensive by comparison so far. They can be salvaged from some automatic gearboxes, Craig from turquoise energy did just that...

subscribing to this thread

I have been toying with building my own large diameter axial flux pancake motor so i could bolt it directly to the cv and not need a reduction drive the magnetic field rotates 7 times faster than the rotor as there are 6 pole pairs and 7 magnet sets this gives 7 times slower speed and almost 7 times...

canberra32; did redex get back regarding the cost of that 2 speed spindle drive?
I have seen a similar one from the phillipines once for US $550 but not as torquey

Running two motors and two controllers in torque control mode instead of speed control mode essentially is trivial in every way but the cost of an extra controller. I kind of liked the idea of two motors in parallel and one controller doing twice the amps in that respect hence why I bought a high po...

I can see a simple reduction drive using belts or planetary or both could do away with the diff as well and use 2 ac motors, one for each cv. Just pick the optimal ratio or have a two stage planetary gear. Still no decision from the engineer if he will allow a car with no diff even better; www.rexre...

I have found many kit makers selling skirts and flares, bonnets etc not found much about full body shells in carbon or glass much less how much they would cost, anyone got a ballpark figure? I am guessing it would be cheaper to make it here. The materials are worked out by weight and a little work t...