Questions tagged [electric-vehicles]

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

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31 views

Will a AWD EV have less range than a RWD EV?

A RWD1 ICE2 car has more range/mpg than the same version of the car with AWD3. Is this true for electric vehicles as well ? For example we have a RWD electric car called Z with 300 miles of range. How ...
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21 views

What are the IEC IP standards/code for electric vehicles?

What an end consumer should know about the level of IP protection provided for a vehicle against hazards which include but not limited to environmental factors, thermal runaway in batteries, etc.
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1answer
66 views

Can you charge an electric vehicle with two mains sockets?

I live in Britain and am considering purchasing an Electric Vehicle, EV; likely the second generation Nissan Leaf. I intend to install a home EV charger at my property, however friends and family do ...
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81 views

Electric vehicle charging losses

"We use 230V – 3 phase with each phase at 16A (so 11kW charging power)" "...the total loss is only about 3.5%, with 1.0% being lost in the transport of electricity through the cables, ...
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1answer
42 views

What should I learn/study to start building ROVs (remotely operated underwater vehicles)?

I'm a software developer with no experience in building physical devices/hardware. I did ~15-20 beginner-to-medium-level projects with Arduino (following some tutorials), but I wouldn't count this as ...
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3answers
77 views

Is there an upper limit to how fast a self balancing one wheeled vehicle can become while also being able to safely stop?

I've recently come across pictures of segway/hoverboard like self balancing motorcycle type vehicles that were supposedly able to become as fast as a street legal scooter. I kept wondering how they ...
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1answer
80 views

Charging a single-phase EV with three-phase power

So last month I bought my first EV (Škoda Superb iV PHEV) and it comes with single-phase charging. I immediately noticed that the provided home charger will only draw 8A from my 16A fused phase supply ...
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2answers
57 views

How do electric vehicles' motors run at high speeds above 10000rpm?

For example, for a squirrel cage induction motor, the speed of operation is given by Ns = 120*f/P depending on the number of pole pairs and supply frequency. Now the supply frequency is 50/60Hz while ...
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71 views

Simple clarification about EV charging

After reading some docs about Electric Vehicles (EV), I learned that there are 4 differents charging modes. For example, let's consider a slow recharge, where EV is connected to a single-phase ...
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2answers
62 views

With ebikes, is there friction from the motor when riding with the electronics turned off?

One may want to ride an electric bike with the electronics turned off. There are many reasons to do this, i.e. flat battery, fitness (who would have thought) When riding an ebike conventionally, is ...
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2answers
78 views

250W 24V Motors

(please note that this is a duplicate of a question the electrical forum, however, there are some mechanical subjects that would be better suited here.) I am trying to make an electric go-kart. I am ...
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23 views

Motors for an omnidirectional RC toycar (with mecanum wheels)

First of all, apologies if this is an Arduino question. IMHO, I felt that the questions is more about motors and their comparison. I'm trying to build an RC toycar using mecanum wheels. The vehicle ...
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3answers
78 views

Electric go kart

I know this may be a physics question but, will a 48 V 1000 W motor with 3000 rpm be able to move a 500 lb go kart on a concrete sidewalk? And, can I use one 12 V 101 Ah 27 A deep cycle marine battery ...
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4answers
167 views

One Wheel Drive utility wagon

I want to add a mid-drive e-bike motor to a pull wagon. I have to carry a heavy load up ramps frequently and adding an ebike motor to my wagon would make the job a lot easier. I already decided to put ...
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36 views

How do you charge 400v battery packs from 120v outlets for EVs?

You need a higher voltage to let current flow. So how is it that you can to charge those big battery packs from home outlets without any additional equipment?
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1answer
174 views

Required torque of climbing tracked vehicle

Currently I'm designing a tracked vehicle for a school project. It has to carry a weight and be able to overcome some obstacles which are about 3/4th the height of the tank. What I'm stuck at, is ...
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2answers
40 views

number of electric vehicles that can be charged with specific amount of energy

I used minutely sampled wind speed data for one year to calculate the yield power from specific wind turbines to be used in electric vehicles charging station. I am supposed to calculate the number ...
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1answer
46 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
45 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
64 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
50 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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23 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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26 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
299 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 ...
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1answer
87 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
426 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 ...
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3answers
105 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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88 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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738 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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406 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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49 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
62 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
9k 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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6answers
1k 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
195 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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888 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?
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1answer
192 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
79 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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194 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 ...
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1answer
568 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 ...
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1answer
242 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 ...
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1answer
376 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,...