20-12-2012, 06:27 PM
BATTERY ELECTRIC VEHICLE
1BATTERY ELECTRIC.ppt (Size: 1.14 MB / Downloads: 110)
Why we need BEV ?
BEV stands for Battery Electric Vehicle.
It is an alternative to fossil fuel driven vehicles.
It is simple in construction.
Calm and quiet on road.
Eco-friendly.
Electrical Vehicle
An electric car is powered by an electric motor rather than a conventional fossil fuel engine.
Range of this car is about 50 miles (80km).
It reaches 0 to 60 mph speed in just about 50 seconds.
It takes about Kwh of electricity to charge the car after a 50 mile trip.
The battery has to be replaced after 3-4 years.
Changes Required
The conventional engine along with the muffler, catalytic converter, tail pipe and fuel tank are to be removed.
Clutch assembly should be removed and existing manual transmission should be kept in place.
New AC electric motor should be bolted to the transmission with an adapter plate.
An electric controller should be added to control the AC motor.
A battery tray should be installed on the floor of the car.
To power the accessories and auxiliary parts separate electric motor should be installed.
Here manual transmission can also be replaced with a switch disguised as a automatic transmission shifter to control forward and reverse movement.
A battery charger is added and the gas gauge is replaced with a voltmeter.
Electric Motor
Electric cars can use AC or DC motor .
If the motor is DC motor then it may run on anything from 96 to 192 volts.
DC installation tend to be simpler and less expensive.
A typical motor will be in 20-30 KW range.
A typical control will be used , having a range of 40-60 KW.
If it is AC motor, then it may run at anything from 240 to 300 volts.
Controller
Controller takes power from the battery and delivers it to the motor.
The accelerator pedal hooks to a pair of potentiometers (variable resistors), this provide the signal to the controller that tell the controller how much power it is supposed to deliver.
Controller reads both the potentiometer and make sure that their signals are equal. If not then the controller does not operate.
The controller can be of AC or DC type.
The DC controller using very large transistors that rapidly turn the batteries on and off to create a sine wave can be used to operate a AC motor.
CONCLUSION
Though it is a very good project but needs a quantitative start.
Cost will definitely decrease if mass production will occur.
Ultimately nature needs it.