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Welcome to decision in this decision, we will discuss about Louisville and its application in the electric



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vehicle system.



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So as we know that Blytheville is a mechanical device which draws the kinetic energy.



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So in construction wise, it is nothing but the one.



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Metal, which is rotating at a certain speed, so when it is rotating at certain spirit, it some kinetic



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energy and that energy we need to utilize.



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The stored energy in the rotary base is depend upon the inertia and angular velocity, it is proportional



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to the inertia and square of angular velocity.



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So to make it compact so we can have the highest paid so high the speed higher the stored energy.



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And inertia depends upon the mass that is the weight of the Rotary report and it shape.



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Let's discuss about what is the use of this flywheel in the electric vehicle.



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So your flywheel is used in electric vehicle to store the energy during the braking operation and will



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reuse it or the acceleration.



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The question must come to mind whether we can use the battery or capacitor also, but we will discuss



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it later.



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In case of conventional mechanical braking system, energy get lost in the form of heat during braking



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so that we are always interested in the electric braking system, and when we can implement the electric



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braking system, we have the possibility to store this kinetic energy in the battery or ultra capacitor



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or with the help of flywheel.



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To assume that this electric motor is attached with the electric vehicle, electric vehicle for some



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kinetic energy and it is moving and if we want to apply the brake at that time.



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During the breaking operation, this mortar will act as a generator and the current flows such that



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it produced the opposite to the direction of rotation of the mortar and so that it supports the motion



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of the vehicle.



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So current will flow through the motor to the power electronics and through the power electronics.



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It will go to the energy storage device.



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It may be battery, it may be a leg up, or it may be flying.



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But in our case it is the flywheel.



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So during the braking operation, the.



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Breaking current is flowing through the water, but in opposite direction, to produce, to talk in



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some water current is flowing in the same direction.



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Even it can produce to talk, but it be opposite and current must flow from the water to an object or



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device through the electronics during the breaking operation.



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And during the acceleration, again, same toward energy can supply back to the motor, to the power



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electronics.



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So flywheel system used in electric vehicle application is a hybrid electric motor built to store the



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kinetic energy in compact size.



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So this is not a simple mechanical structure in case of electric vehicle when we're talking about the



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flywheel using electric.



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But it must convert the input electrical energy into mechanical.



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That means motor, but it is specially built to store the electricity and for kinetic energy.



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That's how.



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But now it is flywheel, the water quality, talking to breaking operation, induced detection and current



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flows, this current project, which is flowing through the power electronics converters and to the



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converters, it goes to the flywheel.



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A flywheel is the electric motor, which convert this electric energy into the rotation.



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So if you recall the equation of energy stored in flywheel so it can have the light rail system such



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that we can achieve the maximum speed.



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So in the compact size, we can store the maximum amount of energy.



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So sometimes the speed of rotating speed of light will make.



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Such high that it exceeded the speed of sound in terms of meters per second.



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I am talking about the surface speed surface speed of light rail used in electric vehicle application



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was very high.



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But to one point five to two make that is one point five to two times the speed of sound, so around



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500 meters per second surface speed can be achieved in flight so that we can have the most amount of



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energy stored.



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So this electrical energy and water in it can occur in kinetic energy and later during acceleration.



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You can use this energy back and this energy can be supplied, the same water can act as a generator



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during the acceleration, and this line gives the energy back to the motor for the power electronics.



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This is what is the role of libraries now?



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Question must be come to mind if it is the motor, if it is a mechanical device.



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And why not use the battery?



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And what are the benefits of flywheel our the battery and ultra capacitor and what can be easily used.



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And that is always there because flywheel is used for little braking purpose and to store the energy



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during breaking only so it can extend the range of battery or the simplicity.



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Battery is not connected and running.



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This blocks in simplified block diagram, but battery must be dead in electric vehicle system.



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Battery, electric.



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So the main thing we need to understand in this part of who we are interested in high speed to have



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the convict size of electric motor using flywheel.



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And also, there must not be any.



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Blinding underwater some water and this flywheel design is also quite different.



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So now let's discuss about the comparison of flywheel versus battery.



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So if we can use the battery also.



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But right.



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Flywheel is used in some application.



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Let's understand, the flywheel has the higher power density, that means it will be lower in size for



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the same power rating, which compared to the battery, even with compared to the lithium ion battery



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flywheel, the higher power density.



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So the size and weight will become less.



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The life cycle is the most important part that we are interested in increasing the range of the vehicle



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and also increasing the replace, reducing the replacement cost of the energy source.



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If you consider the flywheel, its life cycle is very, very high, more than an election cycle.



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We can consider that if we consider the battery, it is around only a thousand cycle life.



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But if we consider the failure so Flywheel can use up to 15 years hazily when that is not replaced after



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four to five years.



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So this way we can compete if whenever we can use the flywheel, we can save some amount of battery



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and we can extend the lifetime of the battery also when we use both flywheel for the stored energy during



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the braking purpose.



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And better, faster than a..



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And we like that we're discussing the case of ultra capacitor.



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Environmental impact and disposal court yet is also benefit in case of flywheel, because the metal



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and metal as a disposal issue and also during the disposal environmental issues is dead.



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So in case of flywheel, it is nothing but simply metal and it is the motor that is only copper and



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steel.



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So it can and easily.



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Environmentally friendly and there is no issue of disposal.



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So this way, even better, is there is the option to use with the electric vehicle as a energy source



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during the braking operation.



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Benefit of battery is the higher energy density we needed for the same size better gives the power for



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the longer term.



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So higher energy density.



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Or the short duration we can use to fly if we compare the flywheel with the ultra capacitor.



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Then again, the energy density of flywheel is higher than the ultra capacitor you've already seen and



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again, our energy for only short duration.



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So, again, this would be used with the battery.



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And in the next session, we are also going to discuss about the source hybridization, how to how we



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can use the different topology when we use the more than one energy source that we met with the flywheel.



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Yet we are not discussing and comparing with the fuel cell because it's a different thing.



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It can be used along with the battery or without the battery.



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The court, the court is less than the cost of the ultra capacitor from the manufacturing point of view,



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so it is the benefit of lightning or the ultra capacitor.



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And again.



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Bonga Life-cycle Evandale capital Life-cycle, is that too high with compared to the battery pack up,



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it can also have the life around and let life cycle and like in like cycle.



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What is life cycle maybe higher than the Otaka?



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An ultra capacitor benefit, if we want to come, then we can convert that is normal in part in the



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recovery effort, but ultimately in the electric vehicle system level IT option and where flywheel is



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used in mostly using the buses and the trucks and mostly in the city buses and also some electric trains



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in the metros.



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So it is suitable when your electric braking requirement is too high.



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So infrequent braking and frequent solutions are required, then we need to think about either flywheel



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or the ultra capacitor can be used as a source hybridization with the electric batteries.



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In addition to electric battery, we should have the flywheel alert truck operator as the energy source



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so that we can extend the range of the vehicle and lifecycle of after battery.



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There is, though, some demonstration to one company.



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You can actually make the flywheel for this American model is used for the city bus and you can see



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the flywheel, actually, mechanical, mechanical flywheel flywheel attached to it, its power electric



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power unit and the converter unit.



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An electric motor is part of the proposal on purpose.



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So when part of the purpose of the valve converters, the energy goes to the library and it's to the



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dump is stored, energy in the kinetic energy in kinetic energy is utilized back with the power electronics.



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And during that collision, it goes back to the motor.



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Now, one more thing, if we discuss about companies competing with the battery, when you use the battery



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instead of living, so always during the regeneration, there may be possibilities that remember, a



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be fully charged battery may be a limitation of the charging current capacity, then the flywheel is



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the better option because it has the higher power density so it can again supply the higher amount of



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current and it can store the energy, things like the battery.



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So.



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But not that it can it is not a standalone energy source like the battery battery must be dead, but



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Flywheel can be used as an additional source.



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Yes, I heard the comparison for some product with that you can make a poor model of Leeville, which



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is our rating is 120 kilowatt in the input power and for calculating the same input.



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Our capability for the ultra capacitor that is from the Maxwell Cap Maxwell Company is well known for



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ultra capacitor manufacturing and battery, a one, two, three.



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It reminds him this event, but the system is currently not producing the cell.



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But this is from all the data.



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But this comparison from the product part of it will give us a good idea about the size and lifecycle



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of different product, and it will give us an idea of why we should go with the flywheel.



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Whenever our electric vehicle application is such that there is a frequent braking operations we need,



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so much is done.



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You can see the power density, the kilowatt birdcages so it is too quick to kill or cagy solar compete



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for the same power requirement.



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Input power is 120 kilowatt.



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And considering the spiritual connection of lithium ion Salem, which kept track of this power.



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And altarock capital, zero point three four kilowatt lithium ion batteries, zero point Wikler, you



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can see it is very high in case of flywheel.



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So total weight for the 120 kilowatt power of the fly really is 55 AKG only.



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Very same for the ultra CAPITALIS 370 cagy and for the battery when it is 240 KAIJI, which is too high



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compared to Flywheel.



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It is obviously depend upon the good design when we can achieve the speed of sophisticated, very high



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speed, very high, then only we can achieve the higher power density in Keflavik.



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But it is possible because it is the actual product that is in this lifecycle is too high and Crack-Up



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life cycle is also high when battery life cycle is very low compared to this to and when we talk about



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the energy density, so it compared to battery life, energy density is very low.



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But even with that, with comparing the rate is high.



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So this is different points we need to consider in selecting either we should go for the only battery



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electric vehicle, we should go for the source hybridization.



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If we go for the source hybridization, then we should use the capital to fly with.



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Let's conclude suitability of the level in which type of electric vehicle application level is more



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suitable, as we have discussed, flywheel system is suitable when electric vehicles possess high amounts



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of kinetic energy.



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So it's possible.



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Now we know the kinetic energy stored is proportional to square off to speed and proportional to inertia.



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That is mass.



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So it's possible when the vehicle at use higher speed are having the very high wind.



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So if we made the application of the vehicle, which was the higher speed, it is the racing car, or



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we can have the higher weight in case of buses and trucks.



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So thus electric vehicle application.



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Red light rail is more suitable with the high speed racing cars, buses, trucks and train applications.



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Flywheel system is more suitable when frequent braking operation is required so that we already discussed.



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So you meet when the frequent braking operation is required.



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It is in the city traffic or in the metro trains.



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Those flywheels prefer for the city buses and the metro trains.