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Questions tagged [electric-vehicles]

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

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Comparing accelerated vs constant motion; inspired by real life example. Is reducing mass the way to save energy in vehicle use?

Energy consumption in jerky vs steady motion. An average European car travels 30 km per day in urban areas mostly. This requires starting and stopping due to traffic lights and congestion and results ...
Piotr's user avatar
  • 11
2 votes
1 answer
73 views

Is it viable to "convert" petrol buses to electric?

As part of sustainable transformation, a city is planning to replace its fleet of 300 petrol-powered buses (part of its rapid transit system) to electric buses. 100-each were bought 7 years ago, 5 ...
whoisit's user avatar
  • 121
1 vote
0 answers
47 views

Electric motors and Internal Combustion Engines compared

I know that Internal Combustion engines are rated in terms of peak power developed, while electric motors are generally specified in terms of continuous power output. Is there a good way to determine ...
Slartibartfast's user avatar
0 votes
1 answer
170 views

Are all autonomus vehicles (self driving cars) electric vehicles (EV) or are some also internal combustion engines (ICE)?

Are all autonomous vehicles (self driving cars) electric vehicles (EV) or some are also internal combustion engines (ICE)? I was having a discussion with my friend and he was insisting that all ...
ATJ's user avatar
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0 votes
2 answers
47 views

For Electric vehicles, HOW are miles per gallon equivalent (or L/100 km) are calculated, accounting for different sources of energy in the grid?

Could someone giver a clear and authoritative answer on HOW miles per gallon equivalent (or L/100 km) are calculated for battery electric vehicles like the Tesla Model 3 AWD long range? On the ...
Sanjay Biswas's user avatar
1 vote
0 answers
16 views

Heat generation mathematical model for Li-ion battery to design a BTMS

I have decided to work on a project in which I have to design a hybrid battery thermal management system (BTMS) for which I need to first model the heat generation from Li-ion batteries. Therefore I ...
Prasanna B's user avatar
3 votes
1 answer
107 views

How do electric motors of cars age?

I was recently discussing with a relative about electric cars. It was claimed that the motor of an electric car would age (wear and tear might be the english term?) and the efficiency would become ...
Martin Thoma's user avatar
0 votes
0 answers
20 views

I want to simulate Motor output WRT throttle

I don't have any idea on how to get started. Can you mention required relations and concepts to get started.
Yetukuri Revanth's user avatar
0 votes
2 answers
147 views

How to mount hub motor with strange shaft profile

I'm thinking about buying a hub motor that seems to be relatively common in the alibaba/ebay world but has a pretty strange shaft coming out of it (see pictures). It has a D profile that doesn't go ...
Ben's user avatar
  • 3
1 vote
1 answer
258 views

What is the approximate horsepower/kW output of a cyclist riding a bike at near ~300km/h?

In 2018, a female cyclist set the outdoors record for fastest cycling clocking in at almost 300km/h. (https://en.m.wikipedia.org/wiki/Denise_Mueller-Korenek), and I am curious to know the approximate ...
Raiden Snaker's user avatar
0 votes
1 answer
278 views

Electric motor for low speed, high torque application?

Background For my mechanical engineering senior design project, we are designing a cargo transporter electric vehicle for off-road conditions. The vehicle needs to transport loads weighing up to about ...
nwsteg's user avatar
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0 answers
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Is it possible to connect 3 rear drive Tesla motors on a single axle using their differential's?

Each Tesla motor that is sold comes attached with an inverter, open differential and a gear reduction. The image on the right of my drawing shows more clearly my preferred most recent setup with a ...
Emmanuel Moreno's user avatar
0 votes
0 answers
38 views

I want to motorize the big 10" wheels on the 4 wheel cart

The ideal setup would be to have in-wheel drives in one or both wheels; a transaxle drive would get in the way of the user. The weight of the cart is 75lbs and the machine it carries weighs 176lbs. ...
David Abdella's user avatar
0 votes
3 answers
3k views

A converter from CHAdeMO cable to CCS connector for charging EV cars

A very similar question to this one. Is there any solution available to use CHAdeMO charging cable to power EV car equipped with CCS socket? My knowledge gained so far says that there isn't anything ...
trejder's user avatar
  • 107
0 votes
1 answer
800 views

CHAdeMO to Type 2 connector for charging EV cars

I'd like to refresh and potentially update my knowledge. Is there anything like CHAdeMO charging cable to Type 2 car plug connector? or any other solution that would allow me to charge my Type 2 car ...
trejder's user avatar
  • 107
1 vote
1 answer
67 views

How does a Charging Station stop a charge with an EV connected

I'm trying to control a charging station with a raspberry pi. The software is almost finished by there is something missing in the electrical architecture of my CS. The EV is connected to the CS with ...
Humberto Adhemar's user avatar
0 votes
1 answer
81 views

Will the cart steer to the left/right by itself in this design?

I'm trying to retrofit a pull cart with electric motor. So, one wheel will have an electric hub motor and it is connected to a rotating shaft to the other non-powered wheel. The driveshaft is ...
ratib90486's user avatar
3 votes
1 answer
249 views

What happens if an EV motor is stalled?

What happens if an EV's motor is stalled, i.e. prevented from rotating while attempting to accelerate? Can this result in over-current damage to the batteries, motor, or speed controller circuits etc. ...
user1751825's user avatar
1 vote
1 answer
122 views

In a AWD Tesla Model 3, why is the front and back motor different?

In a AWD Tesla Model 3, why is the front motor (OEM 1120960-00-E) different from the one in the back (OEM 1120980)? Why not just use the same one for both front and back? I'm sure that there was a ...
m-a-r-c-e-l-i-n-o's user avatar
2 votes
5 answers
124 views

How to protect users from shock hazards from electric vehicle high voltage system?

I am in the design phase of an electric vehicle. I have realised that at one point, we will need to implement protective measures to safeguard the users from shock hazards of the high voltage system. ...
gr3en_apple's user avatar
0 votes
1 answer
107 views

How can Tesla battery packs be so small?

According its Wiki, a Tesla Model S battery pack can accumulate 100 kWh energy. The wiki page of the LiON batteries shows a 100-265 kWh/kg specific energy, and this source shows a Tesla battery pack ...
peterh's user avatar
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0 votes
1 answer
78 views

How to calculate forces for most appropriate electric engine for soft sand? [duplicate]

I'm super new to this topic I'm posting here so please forgive the nursery question and content. I'm hoping to use any answers to help me begin my research and investigation on what I need to learn. I'...
Nick's user avatar
  • 3
-1 votes
1 answer
385 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 ...
Johnspeakerbee's user avatar
2 votes
1 answer
68 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.
lousycoder's user avatar
3 votes
1 answer
131 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 ...
James Geddes's user avatar
1 vote
1 answer
330 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, ...
Andyz Smith's user avatar
2 votes
3 answers
164 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 ...
Jeffrey's user avatar
  • 123
1 vote
1 answer
1k 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 ...
velis's user avatar
  • 111
4 votes
2 answers
95 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 ...
Santhosh Srinivasan's user avatar
1 vote
2 answers
89 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 ...
rainbow's user avatar
  • 111
1 vote
2 answers
586 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 ...
Jackson Harvey's user avatar
-1 votes
2 answers
109 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 ...
Cyrus Murray's user avatar
0 votes
0 answers
143 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 ...
NMech's user avatar
  • 24.4k
-1 votes
3 answers
170 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 ...
user avatar
3 votes
4 answers
619 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 ...
Alexandre Rondeau's user avatar
-1 votes
1 answer
271 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?
Sandro Antonucci's user avatar
1 vote
1 answer
608 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 ...
Ewout Schokker's user avatar
0 votes
2 answers
56 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 ...
user24752's user avatar
1 vote
1 answer
88 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 ...
serekani's user avatar
0 votes
1 answer
56 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 ...
user23417's user avatar
1 vote
1 answer
100 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 ...
Marino Klisovich's user avatar
1 vote
0 answers
129 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 ...
Rusoiba's user avatar
  • 111
0 votes
0 answers
31 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,...
Balaji S's user avatar
0 votes
0 answers
35 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?
anshul suri's user avatar
0 votes
3 answers
551 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 ...
Vesa's user avatar
  • 99
0 votes
1 answer
153 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 ...
mickkk's user avatar
  • 131
2 votes
2 answers
782 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 ...
Sherwood Botsford's user avatar
2 votes
3 answers
126 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 ...
paulj's user avatar
  • 123
3 votes
2 answers
113 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 ...
user avatar
0 votes
2 answers
1k 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 ...
aman2909's user avatar