Those soft starters are really good. No shocks to the motor or spikes on the line. Perfect for hard to accelerate loads like large fans. Direct drive fans like the one shown are preferred for industrial applications due to the simplicity of construction and no belts to slip or break, but they represent a high torque load on start. Solid state soft starters are perfect for smoothly accelerating the motor without causing voltage disruption on the line.
@@Sunnfjordingen What are you talking about? VFDs use more power at the same operating speed when compared to a motor connected directly to mains with a soft start. VFDs always have to convert AC to DC, then back to AC. Soft starters only operate on startup, then it switches the motor to the mains. Unless you need speed control soft starts are the way to go.
@@breakfast7595 PMSM can't really be driven directly from mains, and generally, those motors are most efficient if driven with critical stator/rotor field angle. That operating point is not stable, though. It does require the motor to be designed from the start to make the best out of it's electronic commutation, however.
I visited an industrial plant once, they had a room with 5 500kW fans. After stepping through the door, the sound was like a liquid, nothing got through it, it wasn't neccesarily painful, but the sheer power of these things... If you touched your hat, it vibrated, just from the sound alone. The motors were as big as small vans. Imagine the tons of copper in that machine, and the weight rotating at such speeds.
That sounds more like a VFD start than a soft start. Edit: Soft starter video for reference: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-KSHmA0vDnOQ.htmlsi=6-hy8ZlkGeYmXq5A
it's interesting how some car motors now have this peak power from the motor the size of a watermelon. i know this has that sustained, and car motors only do that for a few minutes, but it's still interesting
Why does this actually sound like I'm standing on a Subway platform underground and the train just started up? It's like it's rushing past me and I hear it echoing down the tunnel and getting more reverb as it fades away
Because it's basically doing the same task, just this one has a huge fan to bring up to speed, and the subway has the subway cab incl. contents (passengers etc.) to bring up to speed. Notice how the ramp-up time is also very comparable.
I don't recall how big some of our fans are. I just remember standing in the plenum! It was a big gymnasium size room. There were 4 fans feeding directly into it.
2 questions: 1] What is the motor code on this thing - must be at least a J 2] Nobody bends 4/0 like that entrance - looks like rubber cord or welding cable - what is it?
If to pumps always running, but there is different sound between this two one of them have like Winding sound what do you think it is winding problem? If you can give me the answer please, and thank you sir
Winding problem will be detected by the soft starter, so if it works don't worry about it. Small problem with windings might get undetected, but then there will definitely be a motor overheating issue. Another issue could be one of the bearings, but then again the bearing would start overheating. If neither of the bearings on either motor is overheating, do not worry about it. There are cases where motors create weird sounds but run with no issues for years.
Try cleaning motor fan with compressed air (turn the motor OFF before doing it). Dust that got stuck on the fan blades/air ducts can produce weird noise. Also visually inspect fan and air ducts for any debris that might got sucked inside the motor fan housing. Debris may obstruct air flow and thus create noise.
