Hi this is a water purifier DC, pump
motor. And the good news is that it is
damaged. So in this video, I'm going to open it
up, rectify the problem and see if it works. And one important thing, if you look at
the back of it, you can see that the screw heads have been cut off, which
means that the repair person tried to open it up, but he could not. So it is going to be a little tricky
this time. So as you saw that, I successfully
managed to open one of the screws by reconstruction of its head, while for
the other one, the leftout layer was very thin, because of which it chopped
off automatically during screw making process. So you see there is no brush left for
one of the terminals, the positive one. And this one is almost at its end, and
that's the reason why the motor was not running. Let's see if we can find something else. So much carbon powder, the leftout brush. So this was a screw that was not
opening and broke off. Finally, the main armature It's quite big and seems powerful. Although there is one thing to notice. The commutators have been used a lot. we can see the curve available on the
communator bars. So starting with the field. Cleaning, the magnets are quite big and strong,
which indicates the strength of the motor. Moving on to the armature cleaning
seems like all the carbon particles have accumulated on the top of the motor it's filled with carbon particles moving on to the brush housing part. So the number of turns that have been
given to the armature slots is very high, and the winding that has been
used is very thin. Which means that if this motor is going
to be used as a generator, it is going to produce high voltage and low current
and rest. We can see later in this video. Now for the alignment check, you can
see its, the hole is matching, as for this one, same here. So finally the motor seems to be
repaired. And now it is time to test it. Now this is a 24 volts DC motor. So here I'm going to use this variable
DC power supply that also has a maximum output voltage of 24 volts dc And as you can see, it is running fine,
although the rpm is quite low, because the motive behind this motor is to run
it at low rpm and at higher torque. Plus, it has to run continuously for
pumping water. So many of you might have already seen
this 4KW motor speed controller that I made in one of my
previous videos, link for which will be provided in the description. And I've connected this controller to
the motor through this pen. Now let's hold it strongly before
turning it on. The switch is on, now slowly turning the
knob. Yeah, it is running. That is so cool. Man, this controller is so nice that it can
even control a 24 volts motor Now let's increase the rpm this one is a very powerful 4KW and the motor is really Small comparatively. Ok, nice. That is so cool. Man, that was a very good test. And it was successful, this controller
can actually control motors from 24 volts to 200 volts. So here I've connected my multimeter in
the voltage measurement mode to my DC motor, which I'm going to use as a
generator. Now as you can see that it is producing
around 5 volts, 8 volts with hand rotation. Let's see the maximum I can do. 9 11 volts 11.42 12.13 volts So 12 volts was the maximum I could
produce with hand rotation. Now I'm going to connect my cordless
drill. Yeah, it's been connected and go.
83
00:07:29,82 --> 00:07:29,549
oh The foliage was too high. 200 volts, mode. And, again, so 31 volts for the maximum voltage
that could be produced. Now let's try the same thing with a
bigger drill machine. Turn on the switch and easily producing 25 volts. Let's go higher. And here we are, crossed an initial
generated voltage. Moving on to the full power. Now for load testing with this 12V 55W bulb I will be using this DC to DC buck
converter with 36 to 48 volts, DC input and 12 volts, 25 amperes, DC output. So here I've connected the converter
and the bulb. It is time to begin the show and nice Let's turn off the lights again. one more light left out
