So what is regenerative braking to
answer that, I will be upgrading my previous 2kw motor design So this is a metal pipe from which I
have to cut out four equal squares. After that, I have to cut them all into
v shapes. But as the motor is curved and the
plate being straight, the contact is minimum. Therefore the v shapes need to be
curved, for which I am going to use my new trick, which involves a vise and
two bolds. Simply place the piece in between the
two bolds and compress it with your vise to get a curved shape. So as you can see now, it fits pretty
good. But this piece still needs a backbone. Therefore I now have to cut out two of
the v shapes. So after completing the welding part,
the motors are secured from all the sides. Now let's perform some cleaning for the
welding areas and proceed further. Finally, this is a steel cover from an
electrolytic capacitor, which I'm going to use here to cover up the coupling
area. So now that the upgrade is complete, it is
time to move back to the topic. Regenerative breaking. I'm going through all these efforts
like adding the sides supports and adding a protective care to the
coupling section because of the inertia of rest and inertia of motion. Now for those of you who do not know, here is a small demo inertia of rest. The body continues to maintain its state of rest even after an applied external
force inertia of motion. The body continues to be in the state
of motion. Even after applying an external
stopping force, So as I've shown you in many of my
previous videos, that most of the electric motor are also electric generators And for any motor to possess the
regenerative breaking feature, it has to be a generator. And this goes specially for the
permanent magnet at once. And this is a permanent magnet motor. So let's test its generating capability
first. So here I have the multimeter that I've
connected to the overall output of my motor. So let's wound the thread and test how
much voltage it is generating. So as you can see, that with the rope
rotation testing, the maximum voltage reached is 27 volts
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00:04:31,37 --> 00:04:31,204
DC. Now let's connect some actual load to
it. So here I've connected this 12v
car head lamp. Bulb Let's turn off the lights and begin the
test. Ok, so as you can see, it is generating
electricity. Here I have the 250 volts, 10000
microfarad electrolytic capacitor. I have three of these. So let's connect them in parallel to
make a small, high voltage battery for demonstrating the regenerative breaking whoa. It is still charged. That's why it has always advised to
discharge the capacitors before working on them. Yeah, this one was charged. I guess I can't believe that these are
electrolytic capacitors and were still charged. Maybe their capacities is too high,
although the spark was very small, which means that the voltage was very
low. So a battery pack is fully complete. This is overall negative, and this is
positive. Now, this is my dc motor speed
controller that I made in my previous video, link of which will be provided
in the description. You can check it out. Now the controller has already been
connected to this motor to demonstrate the regenerative breaking. Now imagine that there is this big car
running at a very high speed on an empty road, and then suddenly there is
this sheep that comes in front of it. Now the driver has to push the brakes
to stop the car. So every atom that is somehow connected
to the car is going to get charged to the level of kinetic energy
proportional to the speed at which the
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00:06:30,90 --> 00:06:30,890
car was running. Now, in that case, when the brakes are
pushed, so the more the push for the brakes and the stopping of the car is,
the higher is the amount of instantaneous energy released to the
environment in the form of heat sound, etc. So two cases arise, first, if the car
was being run by an internal combustion engine, and the second one, if it was
being run by an electrical engine like this one. So if it was internal combustion engine, then regenerative breaking is no longer possible at the moment. But if it was an electrical engine,
then it is possible, and assume that this was the engine that was driving
the car. So here I've added connectors to three
devices. First to the speed controller, the
motor itself. And with 100 watts, car head lamp bulb so let's, connect the motor to the
controller and start turning it on. Now next, disconnect and connect the bulb Quickly let's turn off the lights. ok so turning it on. This bulb got fused too much voltage. So finally there's 250 volts capacitor
battery pack. Here I have connected these two diode in
series with the capacitor to prevent the back flow of charge. Seems like capacitors have been
charged. Let's check their charge voltage. So here we have 35 volts DC. So that's the energy that has been
saved after applying the brakes. Now let's increase the charge further. It is charging right now let's measure the voltage again, and we have 63 volts. DC, so the demonstration is complete. Let's short them up. One more thing. When we connect the load, the motor
slows down. But when we short the wires directly
for maximum loading, it stops instantaneously, like this. See instant stop. Maximum loading. That's why it is regenerative breaking. So that's all for this video. Hope to see you in the next one, till
then by
