VFD Fan Test For Cooling Tower
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- Опубліковано 3 гру 2020
- Large Fan with a variable frequency drive (VFD for short) sometimes called Variable Speed Drive (VSD) for a 300 ton chiller. The High pitched noise you hear is the winding vibrations from the carrier frequency, VFD uses pulse width Modulation to control the speed of the motor. This fan has a gearbox which requires a minimum speed of 20hz. From 20hz, ramped up to full 60hz for a test of the VFD and the tower fan after repairing an issue with the VFD drive controls
Let me know if you like these clips with VFD starts, let me know and ill make a compilation for VFD starts!
NOTE: do NOT reupload this or ANY of my videos on YT, Meta platforms, or TikTok for your views without permission and giving credit to the original owner. Any violators WILL BE REPORTED - Наука та технологія
Watching the stroboscopic effect never gets boring.
The fan should take ~27 times more wattage at 60 Hz, than it does at 20 Hz. The torque required by the fan goes up on the square of speed, while the RPM is proportionate. Thus, the power goes up on the cube of the increase in speed.
Math is hard...
Damn man that's a cool video!!
Sounds like the motor bearings are on their way out.
i like the sound
That thing is scary awesome! Wow! Yes, please, show more. Instant LIKE and SUBSCRIBE! Greetings from Alaska.
amazing! can you show more?
st0nkinat0r yeah! I can make more videos on VFD starts and runs. A compilation coming soon!
It's stopping sound is kinda scary,looks like a aircraft engine stopping
must have been pretty windy
0:57 Amazing still frame rates as the motor speeds up. Maybe next time could try 720p 60p. Great video
what kind of model is this?
Sounds like a CFM-56 on a departing Airbus A320.
Hi i wanna to ask it is possible for one vfd to control multiple motors on colling tower system?
If multiple motors are being wired onto 1 VFD, the nameplate horsepower has to be added together and that would be the rated VFD needed. (2) 30horsepower fan motors wired in parallel at the output terminals would require a 60hp VFD.
Maybe in the future they can use hub motors in these types of fans. Like ok electric scooters or on computer fans
Probably, but I hope not.
but these motors range from 5hp, to motors over 100HP. They’re in a very high moisture environment. Often dripping wet (not from rain) These motor bearings go bad often. Hub motors, entire fan has to get changed VS just a motor with a chain hoist. It’s cheaper and easier to replace.
@@NickSilcox3 I see your point there. If only they didn’t corrode so badly they would last but they could also make some sort of easily fixable type of hub fan or one that’s reliable too
where's that. The building I see looks very familiar
Could I use the sound from this video for a scratch project?
Yes you can, thanks for asking!
0:03, fasten your seatbelts, ready for takeoff.
TECHNOLOGY IS AWESOMEEEEEEEEEEEEEEEE⚡⚡⚡🧲🧲🧲🗣🗣🗣🔥🔥🔥💯💯💯
What is that supposed to be for😅❓
Lol I never gonna get that close to big fan like that I scared
Yea I would be afraid of being chopped to bits no thanks I will stand far back
If fan running 45hz above got abnornal sound.. it's means what is the problem?? Can explain to me
More and likely it is harmonics (resonant frequency) for motors. You would have to go into the drive programming and program the drive to skip 45 hz and maybe go as far as from 43-47 hz to skip and bypass
Thanks
VVVF SIC
Bad joint coupler detected please reestall a neuw one
There’s a cooling tower next to my apartment outside an office building that is probably louder than this. Absolute noise pollution
Cooling towers can be very noisy on hot days when the fan is at full rpm. Couple towers I work on have the “quiet fan” spins slower and larger blades
ON VOI5 BIEN L EFFET STROBOSCOPIQUE DE LA VITESSE DE ROTATION ,,,,,
next time to 60000000000000000000000000000000000000000000 hz
that is - quite literally - impossible
Bac cooling tower
This was a Marley cooling tower, all stainless steel Instead of galvanized sheet metal sump and sides
Cooling tower noisy 😅😂
Not a big fan of this vid 😂! I would be afraid it could suck my phone out of my hand or something like that lol
Motor is not sounding good
Ok it's not just me
That noise is actually from the gearbox. That is how it normally sounds. This Marley Tower is only a few years old
@@NickSilcox3 I was expecting for the gearbox to make little noise
@@pepsicolachao4537 just a different style I had one that sounded like rusty scraping metal
Helical-cut gears?
Not a full run, most VFDs can do way more thne 60, now show it off on 75 or omething and ill be more impressed.
Technically VFDs can over 800hz and even faster, depends on how fast you can turn on and off an IGBT transistor.
Turbocor compressors operate at 400hz. It all depends on the motor’s rating. This motor, gearbox and propeller was all rated for 60hz max. Any faster would cause this to void warranty, and cause permanent damage. Limits are made to protect equipment, Your comment is invalid
@@NickSilcox3 not really. and yes I know thats pretty much the limits, I was being sarcastic and yes I know industrial ones can go much higher frequencies. I have two from AB that can do 400hz on 480 and 2 from ge on 240 that can only do 240, it depends on the drive and technology. I also know what an IGBT is, I work on repairing this shit for a living. I know the limits of them fans, hence why I said in my comment, id be more impressed. (if he had the balls to do so.)