would you please explain to me what that first item does and how this system works? Someone please explain this to me I'm looking to make my swamp cooler fan motor have a variable speed. Will copying this work?
@azanahmad8777
Жыл бұрын
Can we use this for 1440 rpm ac motor of 1/3 HP for reducing the speed
@renanfabs316
Жыл бұрын
Where's circuit diagram?
@shidasheran
Жыл бұрын
Why did you cut the video? It seems that the MOSFETs burned out...
@AAElectrotech
Жыл бұрын
Its SCR and the voltage is 220 V the current pass to the SCR's is quite low. Burning the Scr with low current is never happen
@Ag89q43G0HyA
9 ай бұрын
Is there a way to controll the variac with a digital controller? i wonder if inverter air conditioners use this tech instead of the inefficient single phase to dc to 3 phase ac with variable frequency controll.
@fathimahelmineop7770
Жыл бұрын
It has how many watts 2000
@ashruelectronic
Жыл бұрын
Where is the heat sink and scr from board
@baladar1353
23 күн бұрын
SCRs??? Dude, BT139's are not SCRs. They are triacs (2 antiparallel thyristors in one), and the circuit is NOT a speed controller, but a commercial light dimmer, expanded slightly. It is capable for slowing universal brushed motors somewhat, but definitely not asynchronous (brushless) motors. And the way you stacked 4 of the triacs in parallel is ridiculous. Everyone who has proper knowledge in electronics, knows that only carefully selected and matched semiconductors may be parallelized, especially in power electronics.
@etherealrose2139
7 ай бұрын
Good way to transform electricity to heat and do no actual work. Any real motor with a load will burn all this up. You can only control (properly) AC motors via frequency. Messing with voltage will cause failure. This isn't a DC motor.
@lookoutleo
Ай бұрын
I've been asked to repair an industrial extractor, it draws about 2kw 220v and is induction single phase with capacitor. The speed controller has failed , can you think of a frequency controller available on eBay or AliExpress that would do the job?
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