Electrical Vehicle Project

Ah. That's actually a fossil-fuelled vehicle with electric transmission...

http://en.wikipedia.org/wiki/Diesel-electric

Welcome to CR4, BTW.

First things first. How will you power the 1kW generator? You must decide what the weight of the vehicle will be first. Then you can select a motor.

Do you have any math skills?

Yes, welcome Haris - or is that harris? You seem a little confused yourself.

Try searching CR4 for more info on electric and hybrid vehicles. The Automotive Section is a good place to start . The link is just there -->

on the right

I am also working on a hybrid vehicle. The first thing I did was find a small car (cheap) with a blown engine. I pulled the engine and now I have a nice engine compartment with a suspension, with all the comfort a can provide. I also picked a front wheel drive car and now I have two axles with CV joints that I can connect my drive train to. If you find a car with a manual transmission and the transmission is in good shape you can connect your DC motor to the input shaft of the transmission. That makes things a lot simpler. I didn't go that route because I'm designing my own transmission. Which you could do with a front wheel drive. Think about using two motors and then connect one motor to each wheel. You could even size each motor differently. One high torque low RPM motor to get you going, and the other a high RPM low torque motor. You now have a two speed transmission.

Oh and the trunk makes a handy battery holder, though you may have to beef up the suppension.

Good luck with your project.

You would have to be careful with this set up, as the different torque applied to each front wheel would produce substantial torque steer. Try to have both motors driving a jack-shaft connected to the u-joints.

Hi, I found this site among many to choose from, it may be helpful. DAS

http://www.eaaev.org/

Cool web site. Thanks for posting it. There really isn't a site for what I'm working on. It is pretty different. I am building a hydraulic transmission with the hydraulic pumps being driven by electric motors. I'm going to use the hydraulics for their high torque and regenerative breaking. I've got a plans for hydraulic accumulators. I may use electric motors for high speed because the hydraulics are great for torque but they are low RPM motors. It is a pretty cool design if I do say so myself. I'm going to use different hydraulic motors for different vehicle speeds. In other words build my own transmission. I want to use the hydraulics and electric motors and use them at their optimal efficiency. I'm trying to use what I call stored energy. I'm going to use a gen set to keeps the batteries charged and I'm sizing the gen set for the energy I need for cruising. When you need more then that I will pull it out of the hydraulic accumulators or the batteries.

Well thats my design in a nut shell. I haven't really seen anything like it out there.

G'day fishpipes,

"I am building a hydraulic transmission with the hydraulic pumps being driven by electric motors. I'm going to use the hydraulics for their high torque and regenerative breaking. I've got a plans for hydraulic accumulators. I may use electric motors for high speed because the hydraulics are great for torque but they are low RPM motors."

Sorry to disappoint you, but what you are describing is something very much like an automatic transmission and one thing they aren't is efficient.

The idea behind a hybrid is to utilize one form of power plant that is set up to run at optimal performance then utilize a second technology that has a much boarder range of optimal operating parameters to do the work.

Ok that's the technical definition so lets look at an example.

As mentioned earlier diesel electric locomotives are really hybrid vehicles where you have a diesel engine that is operating at optimal performance. This is then used to drive a generator and generate electricity that is used to drive several electric motors that are connected to the driving wheels of the locomotive.

However, the process of converting mechanical energy to electric energy and then back to mechanical energy is not perfect and you loose about 20% of the power each time you transform the energy.

So if you take into account the inefficiencies in the electric system you end up with only 64% of the diesels output reaching the driving wheels. Now, the trick here is to set up the diesel so that the 46% additional loss in the electric drive train is more than offset by the diesel running at optimal performance all the time rather than just at a given speed.

Now adding a further level of complexity by then utilizing a hydraulic drive system with all its extra mass, losses and so on it going to make it close to if not impossible to retrieve by having your internal combustion engine running at peak performance.

One of the big problems with hydraulic drive mechanisms is their mass. This isn't that much of a problem if the vehicle you are operating is already really massive but the average motor vehicle just couldn't cope with the added mass particularly when you start talking about adding accumulators which drastically increase the amount of hydraulic fluid you need to cart around.

So at a guess if you hydraulic system had similar efficiencies as the electric generator/motor set the overall efficiency of you're transmission is going to be around 41% (80% x 80% x 80% x 80%) which means you have to improve the performance of your electric motor by 59% just to break even.

I know most motor vehicles aren't that efficient but I really can't see you squeezing out an extra 59% and that's before you take into account the added mass.

The figures here are not exact, but they are only meant to give you an idea of how difficult it's going to be adding another layer of technology and two more energy conversion systems.

Personally for motor vehicles I don't believe hybrids are the way to go. In fact you can actually get much better mileage from a similarly sized diesel powered car than the current crop of hybrid petrol electric vehicles. On the other hand you have cars like the Tesla Roadster which is an all electric vehicle that can give the average Ferrari, Lamborghini and Porsche a run for their money.

Now what I really would like to see was somebody taking the concept of the Carver One (image on right) and build an affordable all electric version. Basically it's a three wheeled vehicle that has the ability to bank or lean into the corners so it has phenomenal handling characteristics and is capable of performing 1 g turns, which is something all but the average Formula 1 racing car would have trouble doing.

Unfortunately the company manufacturing the Carver One have gone out of business because the vehicle they were producing was way too expensive and underpowered so it couldn't use its handling characteristics to the max. The power plant was also just a pretty standard internal combustion engine and I have the feeling that an all electric vehicle with regenerative braking and more powerful electric motor could give you a vehicle that had phenomenal performance and cost bugger all to operate.

However, the company that developed the banking or leaning technology are still in existence and have licensed the technology to the US based company Persu Mobility. They plan to have an all electric vehicle but it is aimed at the US market and has too many additional bits and pieces that are jacking the price up and making it unrealistically expensive.

Electric vehicles are not new and in this case the only new technology is the banking mechanism so I really can't see why these vehicles are costing between US$50,000.⁰⁰ to US$100,000.⁰⁰ by the time it reaches the market.

So get too it guys, build me a three wheeled banking electric car for the same price I can buy a conventional one and you have your first sale.

Regards, masu

Well i m haris !!

Basically i m working on hybird vehicle!! using a generator and motor as a diving source!!

you guys share me a valuable information !! & i hope in future u'll more help me in this regard!!

thanking you All !!