Questions tagged [electric-vehicles]
Questions about the design and operation of electric drive vehicles, especially on-road vehicles.
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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 ...
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How to couple an electrochemical model of a cell several times to get a battery?
I have an electrochemical simulation of a lithium ion cell, and I want to use this simulation to simulate a battery pack. I am interested in modeling phenomena in battery packs like the inequal ...
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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 ...
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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 ...
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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 ...
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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.
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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 ...
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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 ...
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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 ...
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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 ...
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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.
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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 ...
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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.
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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 ...
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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'...
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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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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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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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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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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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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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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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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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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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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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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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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 ...
user257813
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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 ...
user16060
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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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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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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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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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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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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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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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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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