Questions tagged [electric-vehicles]

Questions about the design and operation of electric drive vehicles, especially on-road vehicles.

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2
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1answer
36 views

What will happen if we place a couple of separate, small stators around a long rotor instead of 1 large stator around a short rotor?

My original theoretical consideration was using the electric motor's rotor as drive shaft in a car. It led me to this question: "What will happen if we place a couple of separate, small stators around ...
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1answer
23 views

EV AC charging manufacturers

I've been looking into EV AC chargers for businesses (basically, any and all AC chargers up to 2 x 22kW). One thing I've noticed is that quite a few chargers look alike, sometimes to the point of just ...
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1answer
57 views

Electric engine and transmission

What kind of automatic transmission would be the best to connect an electric engine with the rear axle of a RWD car? Specifications: 200HP, 3000rpm electric motor top speed 220km/h The automatic ...
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0answers
36 views

Finding Supply/Nominal voltage for Torque Motor BLDC

I'm a bit confused by torque motors datasheets as it never mentions any nominal voltage. I would like to run a torque motor on a 24 V battery. The required max torque is 150 Nm (=21000 ...
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0answers
21 views

ev hub motor spec, for pulling roller

I am working on a 500 kg roller, which I want to pull using electric motor. I am considering hub motor, since it is easier to frame a basic ev with it. Now I need to know the capacity of the hub motor,...
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0answers
21 views

Frequency domain analysis of steering system of a car

Can anyone share the equations involved, or some relevant theory material for frquency domain analysis of steering rack and pinion using bode plot?
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3answers
100 views

How far can I drive an electric bicycle with a 250 watt engine using three serial connected 12 V motorbike batteries?

How far can I drive an (average sized) electric bicycle with a 250 watt engine using three serial connected 12 V motorbike batteries? Trying to research the feasibility of this. I would like to ...
1
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1answer
55 views

How to calculate the maximum starting traction force for a train with multiple carriages?

Suppose I have a convoy composed of the following elements: A locomotive with 4 driven wheelsets (2 wheels per wheelset and therefore 8 wheels). $n$ carriages with 2 wheelsets each. Assuming the ...
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2answers
118 views

What are the tradeoffs between using hydraulic motors and electric motors?

My limited understanding of hydraulic systems is that they aren't nearly as efficient as electrical systems, and that wire is cheaper than high pressure lines. Example: In a zero turn mower, each of ...
2
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3answers
90 views

Overhead cable vs batteries for vehicles

This mainly would concern Europe, since part of the infrastructure is already in place (trolleys overhead cables). What economic reasons prevent electric autos sans large batteries from being ...
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2answers
70 views

Battery Swapping in Electric Cars

What are the advantages and disadvantages (technical, financial etc.) of having battery swapping system over charging stations for electric cars? As per my reading, battery swapping seems feasible for ...
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2answers
135 views

Is hall sensor also used in PMSM drive scheme as like used in BLDC motor?

I am little bit curious about, is hall sensor also used in PMSM motor drive? Since in PMSM motor the voltage applied is sinusoidal, all 3 phase are active, so a rotating flux is introduced, which is ...
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0answers
184 views

How to regulate torque/RPM on an IWD vehicle

Generally, I'm interested in simple (DIY) electric vehicle design problems. I saw some photos of electric vehicles as in the following pic: or also you could check this youtube video. The vehicle is ...
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0answers
45 views

Batteries for electric airplanes [closed]

I'm interested in the development of electric small airplanes with 4 or 6 seats, that could really happen in the following decades. One of the main problems related to this project would be the ...
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1answer
38 views

How the sizing of electric motor is done for a electric vehicle?

I have calculated the resistances encountered by the vehicle. Now to find the required power i used formula ...
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5answers
7k views

Does an electric vehicle going downhill recover energy?

I have to model the behavior of an electric car. For this, I use these equations and I can observe by "playing" with parameters that, when going downhill at constant speed, the car has a negative ...
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5answers
260 views

Do gears make an electric motor bike more efficient?

Electric motor bikes were sold initially on the idea that there would be lesser maintenance and it would remove the requirements of the gears. Now, a lot of people like having a geared system. Some ...
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3answers
139 views

Advantages of quadruple motor electric car

When Tesla introduced the dual motor model s it had better range and performance (so better in everyway except price). Would a quadruple motor car (one per wheel) have even better range and ...
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2answers
553 views

How do you increase the horsepower of an electric motor?

I read that a Tesla Model S P100D achieved 730 horsepower on a dynamometer. Would increasing battery size increase the horsepower? If not, what would?
2
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1answer
148 views

Could a reciprocating engine be powered by electric arc instead of combustion?

The heat of a lightning bolt causes the surrounding air to rapidly expand causing thunder in the process. A reciprocating combustion engine ignites an air fuel mix to use the rapid expansion created ...
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1answer
75 views

What would be needed to make a tesla fastest car in the world? [closed]

If you were aiming for 300mph then what would need to change and would it be possible. There is less heat so less drag which must be a huge advantage. What kWh battery pack would be needed?
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1answer
155 views

Evaluate my electric tricycle project

The above is my daughter's tricycle that I plan to make run off some spare Lithium-ion 18650s. I was just thinking of mounting a small DC motor to where I am pointing, and it will use a small tyre to ...
0
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1answer
533 views

V8 electric engine [closed]

For a while I have thought it would be interesting if someone could develop a 'reciprocating electric' engine. It would use the same principle as maglev trains to move a magnet up and down in a ...
3
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1answer
228 views

A couple of questions about making an electric hobby car from scratch [closed]

So I'm a high school student doing some competition (a wallet-sized one, unfortunately) and I'm supposed to make an electric car. Think an RC-car, (about that size) without the remote control. I want ...
3
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1answer
336 views

Why not use just one electric motor in a car?

Instead of using an alternator to charge the battery, and a starter to start the engine, why not just put one electric motor which is always connected with the engine? When we want to start the motor,...