Let's make 15000 rpm from a 4000 rpm brushed motor. It has twelve volts. So here I will use this power supply to
test it. Next, this drill chuck will be connected to
the shaft of the motor so that the reflector tape can be
attached to it. For rpm measurement it's 4000 rotations per month. So let's increase it to fifteen or 16000 rpm So finally the machine is complete. It's time to test it. Ok? So starting it. Here we go, 15000 rpm, very high speed let's point it towards this plant so we can definitely use it for high
speed air blowing purpose. So the second application is vacuum
cleaning, which I will demonstrate with this dead and discarded vacuum cleaner. It's burnt and jammed see burnt
commutators. So the motor needed a little bit
oiling. And as you can see that it is running
smooth now. let's take off the impeler for
experimenting with my geared motor. So turning it on let's hear, the sound. Now, the drawn current is 8.5 amps,
and the supply voltage is twelve. So making it around 100w, which is
ten times less than 1000w vacuum cleaner motor. And the suction pressure is going to be
same, since it depends totally on the speed of the impeller. And it's not important which machine
runs it. So for the final test, I have attached
this proplar to my geared motor. The size of the propeller is very small
compared to that of the motor itself. And also, the weight of the motor is a
lot. Like. If I'm going to hold it, you can see
that my proper is actually bending. So this is 12v 42amps battery pack, and my motor needs
only 12v 22 amperes So trying this now, this is a 24 volts, 20 amps
power supply to push my motor to extreme limits. Now, it did not fly. And I can only think of two reasons
first the weight, the weight of the motor itself was very heavy. And the second one was that the
propeller was weak and it was bending, as I showed you, initially,
because of which I think the blades twisted enough to cancel the thrust
that was created. Now I have another propeller. This one is seventeen inches, and the
older one, it is ten inches. I've already tried this one also, but
it did not work with this one. Because the torque has been reduced
since I have increased the rpm And both are inversely proportional. So I think I will have to get something
in between the two, like twelve to fourteen inches. And then it should work. And once it does, then I'm going to definitely share it
with you guys. in one of my upcoming videos
