Welcome to decision in this decision, we will discuss about Louisville and its application in the electric
vehicle system.
So as we know that Blytheville is a mechanical device which draws the kinetic energy.
So in construction wise, it is nothing but the one.
Metal, which is rotating at a certain speed, so when it is rotating at certain spirit, it some kinetic
energy and that energy we need to utilize.
The stored energy in the rotary base is depend upon the inertia and angular velocity, it is proportional
to the inertia and square of angular velocity.
So to make it compact so we can have the highest paid so high the speed higher the stored energy.
And inertia depends upon the mass that is the weight of the Rotary report and it shape.
Let's discuss about what is the use of this flywheel in the electric vehicle.
So your flywheel is used in electric vehicle to store the energy during the braking operation and will
reuse it or the acceleration.
The question must come to mind whether we can use the battery or capacitor also, but we will discuss
it later.
In case of conventional mechanical braking system, energy get lost in the form of heat during braking
so that we are always interested in the electric braking system, and when we can implement the electric
braking system, we have the possibility to store this kinetic energy in the battery or ultra capacitor
or with the help of flywheel.
To assume that this electric motor is attached with the electric vehicle, electric vehicle for some
kinetic energy and it is moving and if we want to apply the brake at that time.
During the breaking operation, this mortar will act as a generator and the current flows such that
it produced the opposite to the direction of rotation of the mortar and so that it supports the motion
of the vehicle.
So current will flow through the motor to the power electronics and through the power electronics.
It will go to the energy storage device.
It may be battery, it may be a leg up, or it may be flying.
But in our case it is the flywheel.
So during the braking operation, the.
Breaking current is flowing through the water, but in opposite direction, to produce, to talk in
some water current is flowing in the same direction.
Even it can produce to talk, but it be opposite and current must flow from the water to an object or
device through the electronics during the breaking operation.
And during the acceleration, again, same toward energy can supply back to the motor, to the power
electronics.
So flywheel system used in electric vehicle application is a hybrid electric motor built to store the
kinetic energy in compact size.
So this is not a simple mechanical structure in case of electric vehicle when we're talking about the
flywheel using electric.
But it must convert the input electrical energy into mechanical.
That means motor, but it is specially built to store the electricity and for kinetic energy.
That's how.
But now it is flywheel, the water quality, talking to breaking operation, induced detection and current
flows, this current project, which is flowing through the power electronics converters and to the
converters, it goes to the flywheel.
A flywheel is the electric motor, which convert this electric energy into the rotation.
So if you recall the equation of energy stored in flywheel so it can have the light rail system such
that we can achieve the maximum speed.
So in the compact size, we can store the maximum amount of energy.
So sometimes the speed of rotating speed of light will make.
Such high that it exceeded the speed of sound in terms of meters per second.
I am talking about the surface speed surface speed of light rail used in electric vehicle application
was very high.
But to one point five to two make that is one point five to two times the speed of sound, so around
500 meters per second surface speed can be achieved in flight so that we can have the most amount of
energy stored.
So this electrical energy and water in it can occur in kinetic energy and later during acceleration.
You can use this energy back and this energy can be supplied, the same water can act as a generator
during the acceleration, and this line gives the energy back to the motor for the power electronics.
This is what is the role of libraries now?
Question must be come to mind if it is the motor, if it is a mechanical device.
And why not use the battery?
And what are the benefits of flywheel our the battery and ultra capacitor and what can be easily used.
And that is always there because flywheel is used for little braking purpose and to store the energy
during breaking only so it can extend the range of battery or the simplicity.
Battery is not connected and running.
This blocks in simplified block diagram, but battery must be dead in electric vehicle system.
Battery, electric.
So the main thing we need to understand in this part of who we are interested in high speed to have
the convict size of electric motor using flywheel.
And also, there must not be any.
Blinding underwater some water and this flywheel design is also quite different.
So now let's discuss about the comparison of flywheel versus battery.
So if we can use the battery also.
But right.
Flywheel is used in some application.
Let's understand, the flywheel has the higher power density, that means it will be lower in size for
the same power rating, which compared to the battery, even with compared to the lithium ion battery
flywheel, the higher power density.
So the size and weight will become less.
The life cycle is the most important part that we are interested in increasing the range of the vehicle
and also increasing the replace, reducing the replacement cost of the energy source.
If you consider the flywheel, its life cycle is very, very high, more than an election cycle.
We can consider that if we consider the battery, it is around only a thousand cycle life.
But if we consider the failure so Flywheel can use up to 15 years hazily when that is not replaced after
four to five years.
So this way we can compete if whenever we can use the flywheel, we can save some amount of battery
and we can extend the lifetime of the battery also when we use both flywheel for the stored energy during
the braking purpose.
And better, faster than a..
And we like that we're discussing the case of ultra capacitor.
Environmental impact and disposal court yet is also benefit in case of flywheel, because the metal
and metal as a disposal issue and also during the disposal environmental issues is dead.
So in case of flywheel, it is nothing but simply metal and it is the motor that is only copper and
steel.
So it can and easily.
Environmentally friendly and there is no issue of disposal.
So this way, even better, is there is the option to use with the electric vehicle as a energy source
during the braking operation.
Benefit of battery is the higher energy density we needed for the same size better gives the power for
the longer term.
So higher energy density.
Or the short duration we can use to fly if we compare the flywheel with the ultra capacitor.
Then again, the energy density of flywheel is higher than the ultra capacitor you've already seen and
again, our energy for only short duration.
So, again, this would be used with the battery.
And in the next session, we are also going to discuss about the source hybridization, how to how we
can use the different topology when we use the more than one energy source that we met with the flywheel.
Yet we are not discussing and comparing with the fuel cell because it's a different thing.
It can be used along with the battery or without the battery.
The court, the court is less than the cost of the ultra capacitor from the manufacturing point of view,
so it is the benefit of lightning or the ultra capacitor.
And again.
Bonga Life-cycle Evandale capital Life-cycle, is that too high with compared to the battery pack up,
it can also have the life around and let life cycle and like in like cycle.
What is life cycle maybe higher than the Otaka?
An ultra capacitor benefit, if we want to come, then we can convert that is normal in part in the
recovery effort, but ultimately in the electric vehicle system level IT option and where flywheel is
used in mostly using the buses and the trucks and mostly in the city buses and also some electric trains
in the metros.
So it is suitable when your electric braking requirement is too high.
So infrequent braking and frequent solutions are required, then we need to think about either flywheel
or the ultra capacitor can be used as a source hybridization with the electric batteries.
In addition to electric battery, we should have the flywheel alert truck operator as the energy source
so that we can extend the range of the vehicle and lifecycle of after battery.
There is, though, some demonstration to one company.
You can actually make the flywheel for this American model is used for the city bus and you can see
the flywheel, actually, mechanical, mechanical flywheel flywheel attached to it, its power electric
power unit and the converter unit.
An electric motor is part of the proposal on purpose.
So when part of the purpose of the valve converters, the energy goes to the library and it's to the
dump is stored, energy in the kinetic energy in kinetic energy is utilized back with the power electronics.
And during that collision, it goes back to the motor.
Now, one more thing, if we discuss about companies competing with the battery, when you use the battery
instead of living, so always during the regeneration, there may be possibilities that remember, a
be fully charged battery may be a limitation of the charging current capacity, then the flywheel is
the better option because it has the higher power density so it can again supply the higher amount of
current and it can store the energy, things like the battery.
So.
But not that it can it is not a standalone energy source like the battery battery must be dead, but
Flywheel can be used as an additional source.
Yes, I heard the comparison for some product with that you can make a poor model of Leeville, which
is our rating is 120 kilowatt in the input power and for calculating the same input.
Our capability for the ultra capacitor that is from the Maxwell Cap Maxwell Company is well known for
ultra capacitor manufacturing and battery, a one, two, three.
It reminds him this event, but the system is currently not producing the cell.
But this is from all the data.
But this comparison from the product part of it will give us a good idea about the size and lifecycle
of different product, and it will give us an idea of why we should go with the flywheel.
Whenever our electric vehicle application is such that there is a frequent braking operations we need,
so much is done.
You can see the power density, the kilowatt birdcages so it is too quick to kill or cagy solar compete
for the same power requirement.
Input power is 120 kilowatt.
And considering the spiritual connection of lithium ion Salem, which kept track of this power.
And altarock capital, zero point three four kilowatt lithium ion batteries, zero point Wikler, you
can see it is very high in case of flywheel.
So total weight for the 120 kilowatt power of the fly really is 55 AKG only.
Very same for the ultra CAPITALIS 370 cagy and for the battery when it is 240 KAIJI, which is too high
compared to Flywheel.
It is obviously depend upon the good design when we can achieve the speed of sophisticated, very high
speed, very high, then only we can achieve the higher power density in Keflavik.
But it is possible because it is the actual product that is in this lifecycle is too high and Crack-Up
life cycle is also high when battery life cycle is very low compared to this to and when we talk about
the energy density, so it compared to battery life, energy density is very low.
But even with that, with comparing the rate is high.
So this is different points we need to consider in selecting either we should go for the only battery
electric vehicle, we should go for the source hybridization.
If we go for the source hybridization, then we should use the capital to fly with.
Let's conclude suitability of the level in which type of electric vehicle application level is more
suitable, as we have discussed, flywheel system is suitable when electric vehicles possess high amounts
of kinetic energy.
So it's possible.
Now we know the kinetic energy stored is proportional to square off to speed and proportional to inertia.
That is mass.
So it's possible when the vehicle at use higher speed are having the very high wind.
So if we made the application of the vehicle, which was the higher speed, it is the racing car, or
we can have the higher weight in case of buses and trucks.
So thus electric vehicle application.
Red light rail is more suitable with the high speed racing cars, buses, trucks and train applications.
Flywheel system is more suitable when frequent braking operation is required so that we already discussed.
So you meet when the frequent braking operation is required.
It is in the city traffic or in the metro trains.
Those flywheels prefer for the city buses and the metro trains.