Lizzie asks…
how many watts does an electric car motor draw on average at any given time?
Im trying to find out the power consumption in watts at any given time for an electric car motor. Only thing i could find was kwh usage over a given number of miles, which i found 5.75 miles per 1kwh used
admin answers:
1300 to 1800 Watt-hours is typical.
Robert asks…
How efficient is a gasoline engine to a electric motor car?
What is the difference in H.P. between a gasoline engine car and a electric motor car to get to 0-60 in a given amount ot time? A electric driven car doesn’t have a transmission, differential, and is driven right at the wheels.
admin answers:
The horse power depends on how much current you are running through how many motors. Transmissions are not required in electric cars. The amount of torque is pretty much consistent from start to max speed. If you had a motor at each of the four wheels, you will have a very good acceleration rate. When you talk about efficiency rate, HP should not be mentioned.
Lisa asks…
Electric Car Range: How is it affected by the Electric Motor wattage?
Imagine you have an electric car with a specific battery capacity and you want to test the effect of the electric motor to the car‘s range.
So, assume you have 2 motors: one with A KW and another with 5A KW.
If placed on the car and used to test the range till total battery depletion (assuming same constant velocity) which motor would lead to higher range?
admin answers:
If the same car is moving at the same speed, it will use the same amount of energy to move it the same distance. (Weight difference between the motors will probably be negligible). The energy different motors use to supply this will vary
Assuming that both motors are rated high enough to maintain the desired speed, the biggest factor affecting range will be motor efficiency. The power rating has little to do with efficiency. It is possible that either the larger or the smaller motor could deliver the better range.
Generally electric motors with lower electrical resistance, better insulation, lower magnetic reluctance and smaller air gaps will have higher efficiencies. Running a motor closer to its voltage limits will mean less power losses. (Power losses=ampxampx resistance)
This link has some typical examples of motor efficiency curves versus output power.(EFF v Wo)
http://www.cyclone-tw.com/dc24.htm
Work out the power range that you car will need, to maintain your desired speed. Then you can then look for the motor with the best efficiency curves to match your needs.(and gearing).
In short it is more a matter of how well the motor is made and how well it matches your needs then what it is rated at. A larger motor will usually run more efficiently at its rated load. If it is running well below that then the smaller motor may well give best results.
The trade off for longer range is usually slower acceleration.
John asks…
What does the word break in the electric motor before running… car mean here?
For electric cars, break-in the electric motor before
running the car. Break-in seats the commutator brushes and
lessens the friction between the armature shaft and the
bearings or bushings at both ends of the motor.
admin answers:
Honestly I’m not sure. I can tell you that with real cars, a brand new vehicle just off the lot has what is referred to a break – in period. This means that for the first 50 miles or so you shouldn’t over drive the vehicle. This allows the engine to losen up mechanically before it is ready for more stress.
Carol asks…
Best type of batteries and electric motor to power electric car?
What would be the best choice of batteries and electric motor to go for to build an electric car?
admin answers:
“Best” is a funny word in this situation because you may be designing for long life, maximum power or most economical. In each case the “best” may very well be different.
If you were looking for a purely economical, “best” then you may seriously want to consider the standard lead acid battery and a DC motor. This will make wiring much cheaper and parts might be had used or salvaged.
If you were looking for the longest life then you might seriously consider Nickel-metal hydride batteries as the ones in the Rav4 have over 100,000 miles on them and are still working. You might consider regen braking as this will also lead to less wear on other parts of the vehicle.
If you were looking for the best performance then one of the lithium family of cutting edge technology will give you the best power to weight ratio. You will certainly be looking at an AC induction motor. The real work will be in the controller and battery management system.
Michael asks…
Would a washing machine motor power a small electric car?
My friend and I are going to build something like a soapbox car except with an electric engine. I was wondering if a washing machine motor with enough batteries would make it go and to go a reasonable speed, what size of motor would I need. I don’t know if this makes sense because I’m new to the whole car – motor thing. Help please!
admin answers:
A small powerful motor would be the starter from a car. Just get one cheap from a junk yard.Get the batt. Cables too while your there. They are already 12 volt so all you have to is get a car batt. To go with it. Get one that was on a big v8 engine so it will be more powerful.
Richard asks…
Where can I buy a VERY Powerful electric car motor?
I want it to be able to get up to like 180 mph.
admin answers:
You probably can’t.
One problem would be how heavy it is?
Another problem is what kind, and how many batteries does it need?
Worse, where are you going to go 180 mph?
Maybe you’re thinking you’ll be able to outrun the highway patrol.
But their radios and helicopters will catch you.
And at any speed like that, it’s a felony.
Really bad idea.
If you want to keep your car insurance, and also have the urge to drive that fast, might i recommend a very old VW bus, that just can’t do it.
That’s what i did, and it worked very well. *sigh*
Joseph asks…
When buying a rc car electric motor, what does (turns) mean?
My son has bought a RC 18B 1:18. He is looking to upgrade the motor. We can’t determin which motor to get. It seems there is quite a selection to choose from. He wants a motor that will give him more speed. When looking at these motors (turns) come up. Can get 1 to 20 turns in a motor. What does this mean? Is it windings in the motor? Does it have to do with torque, or rpm’s?
admin answers:
The previous person answered your questions.
But the basics of electric motors are that the fewer the turns (The lower number) will have greater RPM, but less torque than a higher turn motor.
The main difference is that a higher turn motor will be slower than a lower turn motor. Howeverm even though a lower turn motor will give you more speed, it will also give you less runtime per battery, and often a shortened lifespan.
Hope that helps!
Donna asks…
What is the function of a motor in electric car?
Hai guys can any one say me about the function and working of a motor in an electric car
admin answers:
An electric car motor functions by using electrical energy to create mechanical energy. It can be powered by DC from a battery powered device or by AC from an electrical distribution grid. Electric motor is used to propel the vehicle and the speed of the vehicle is controlled by the motor.
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