electric powered cars

[ghosthunter]

You see, years ago, cars do not come to more than 100horses, now it it more than 400horses, in fact 75horse power is average and that seem to be enough then, that is only 55KW, torque transfer is higher with electric motors than fossil fuel vehicles. 150KW will give you 200horsepower, with better torque than gasoline engine, it is a real sports car! http://www.teslamotors.com/ as example.

I don't know how you'll be connecting the motor to the road but if you do a direct drive system to the wheels (like in-hub motors), 100hp motor will be equal to 100hp on the road.

That is compared to a standard engine rated at 100hp but only transmits around 75hp to the road because of transmission and accessory losses.

Plus the main advantage of an electric motor is the torque. In an engine, torque & hp rises with rpm. But in an electric motor, 100% torque is available from zero rpm. So you don't need a single 200hp electric motor. You can have sports car performance from twin 50 to 70 hp electric motors fitted in the wheel hubs.

[tumbaga]

I don't know how you'll be connecting the motor to the road but if you do a direct drive system to the wheels (like in-hub motors), 100hp motor will be equal to 100hp on the road.

That is compared to a standard engine rated at 100hp but only transmits around 75hp to the road because of transmission and accessory losses.

Plus the main advantage of an electric motor is the torque. In an engine, torque & hp rises with rpm. But in an electric motor, 100% torque is available from zero rpm. So you don't need a single 200hp electric motor. You can have sports car performance from twin 50 to 70 hp electric motors fitted in the wheel hubs.

You use a transmission just like regular cars, in fact you can use any transmission, or trans axle or for that matter. You can do direct drive but that would be inefficient. There is an interesting problem with motors is that starting is the most damaging to itself, there is an overshoot on voltage and current, more than 100% power for one instant, you also do not want the motor to work hard giving it shorter life. Working hard for electric means current and not voltage or HP.
Voltage will be constant except for the instant it turned on.

As soon as the motor touches the road it will draw current, the heavier the load the more current it will draw, the less life batteries will have and like I said the motor will not last as well.