Hi, welcome to a product review by Robojax. in this video we are going to
test the universal DC 10 to 60 volts 20 ampere pulse with moderation
motor speed regulator. we are going to test it by connecting it to a motor to
see how the motor response and also we were going to test if it really can
handle 20 ampere of motor or load. let's get started with this
my name is Ahmad Shamshiri and I am presenting this review from Canada.
this is the module and have two large heatsinks and two smaller with a variable
speed controller. let's sold on ebay between four dollars
or three twenty four or maybe nine dollar with a case I will provide you
the link so you can go directly and see it if you want to buy it you see
different prices made of this one the path for the current is very wise and
that's good because it will protect the PCB. and the components that are used
here they've rubbed the model and name of the components and see they've
wrapped the model of these MOSFETs the same for the other one except except
this Schottky diode dual Schottky diode the model you see stars an MBR and also
this voltage regulator they have also rubbed the model of this
MOSFETs that you see here from this side I can see that they are parallel that
the left pin is connected the middle pin is connected and this is perhaps the
gate of the MOSFET so they are in parallel so these two have been used
the Darin and Sources are in parallel. and then we have here we have a voltage regulator
that provides power for this 555 timer IC which is used as PWM pulse width
modulation generator. and the speed of or the duty cycle is being controlled using
this variable resistor or potentiometer. this is a variable resistor because you
do not change it with screwdriver so with this one you change the duty cycle
and consequently it will change the speed of motor. and then we have here a
diode that is part of this pair of tires here used as a protection at the output
stage against the inductive load spikes that comes,
protect the circuits. the diode is the MBR 20100 CTG that is used and as you
can see here the left and right is the anode 1 and 3 so these are anode and the
middle one is the cathode and this is used on the output stage and as you can
see here this is the anode of one diode and as the cathode. Cathode is common this
is another anode and these two anodes are connected together so two diodes
have been used in parallel and each can handle 10 ampere so to be 20 ampere in
total. and the cathode is connected in here as you can see these two annals are
connected to the negative yes this pen is this negative and the castle is
connected to this which is the positive pen and here. and also we have a 20
ampere fuse. the labels are very bad here you barely you can see them and here it
says power and here it says motor. plus and minus have been labeled but you can
see them there is also an LED that will turn on the LED also gets power from
regulated power so independent of the input you can connect around 10 to 60
volts at the input they labeled it and then this voltage regulator will
regulated perhaps this is lm317. Looking the component this seems to be lm317
adjustable voltage regulator if we assume that that this will be the chip
the middle pin 1 is the output and this is the N and this is the adjust so the middle one
is the output for the middle one these are the three pins for that chip and
from the left this is the output and as you can see 6.8 volts and the same pin
this way is connected to the to the 555 IC the pin 8. the pin 8
of this is also power supply as you can see here the pan 8 is a VC C for this
555 timer. and then this will operate with a regulated voltage and
also provides biasing for the gate of these 2 MOSFETs. the input voltage also
is limited by this by the input capacitor this is for the output and
passes R and this one both of these are 63 volts so this can handle the 63 volts
we are going to test it to see if it really can handle 20 ampere of current
passed through this to control a motor. length of this modulus 77 millimeter the
wealth is 45.7mm millimeter height of this module is
29.6 millimeter is. Weight is 69.4 grams.
Testing Speed of the motor
let me demonstrate it now then put voltage of 12 volts I have connected it
to this motor that can draw around 2 amperes without any extra load on this
and I'm going to correct it next to 10 15 and 20 ampere load but for now let's
see how this controls the motor so now it's at the minimum slowly increasing it
let's see you can go this minimum
so if you rotate it (sorry, corrected) counterclockwise fully it'll stop and slowly you can increase
the rotation let me do it again
Testing with higher current
now I have corrected this these two pens are the input it's now connected to 10
volts and this output is connected to the load I'm using electronic load this
is the Rigon DL 3130 electronic load that I'm using for this purpose. and the
two wires from the output of my circuit is connected in here and it shows now 2
volts 20 volts and 2 amperes it can be turned on and turned off it just shows
the voltage now there is no current. you can see here this is the output from
this module at the moment and when I adjust that the voltage should be steady
which is between 9.95 to 10 volts that's good. and now it's a 10 ampere if set
here this is a voltage from this device and this is the current and let me put
it at a maximum now 10 ampere is being drawn. let me change the input voltage to
12 volts
123 what mortars better to say very stable absolutely no issue
let's go higher I'm going slowly 11A 12A 13 I'm increasing it here 14
absolutely like other component there is no heat or anything. 15 amp 16 17 now it's
drawing 17 ampere let's go 18 19A let's see if the fuse can handle this 20 amp
now this is 20 ampere now it's at the maximum 20 ampere very normal let's see
the diode very normal temperature.
240 watt load or motor is connected to this
this Schottky diode is very hot let me decrease the current because this will
burn if we continue like that it's very hot
19 I'm decreasing it here by changing the value in here let me go to 15 ampere
and leave it now this is hot as well Schottky was hot let's give it a little
time
I have tested with higher voltage I'm going to go 24 volts and see how this
behaves and the maximum voltage based on the sellers data is 63 volts these
capacitors are 63 volt so you can go up to 60 volts but this is worrisome this
regulator it might not be able to accept above 30 volts so I'm going 24 volts now
so we have 24 volts and let's go 15 ampere
very cool a little warmer this piece the Schottky diode is also getting warmer
can handle 15 ampere at 24 volts but for continuous operation this would be very
hard let's go down 10 amp now if I set it at 10 ampere after this for five
minutes the timer will beep and I was already two more minutes past but this
is 2 plus 5 will be several minutes
is up. for several ministers continuously when with 10A absolutely
fantastic. now I have set this the input voltage 30V and 10 ampere let's
go for five minutes and see how it behaves.
12 ampere
this looks absolutely fantastic. it's just barely warm. by the way this is the
room temperature at the moments that I did this test now the input voltage is 36
and I set it to 10A.
Conclusion remarks
now for conclusion I could say that this device can handle continuously 10 ampere
at 12 volts 24 and 30 vol that I've tested and any value in between 15
ampere it can handle it if you go for a few minutes unless you have to 5 or 10
minutes but above that 20 minutes this cannot handle it only maybe in bursts of
10 15 seconds other than that this will die. unless you do some extra cooling fan
or something and I also showed the temperature of this room
of course if your environment is hotter then maybe you need to cool this down or
reduce the current in order to use if continuously. thanks for watching if you
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Subtitle typed and corrected by Ahmad Shamshiri in Canada on August 01, 2020
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