Motor Drives (Full Lecture)
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- Опубликовано: 10 сен 2024
- In this lesson we'll examine motor drives, power electronics devices that vary the speed and torque of a motor under its direction by varying the supplied voltage magnitude and frequency. We'll review those properties that influence synchronous speed, examine antiquated methods of speed control, discuss rectification, inversion, and filtration, examine common motor drive specifications and parameter programming, and, finally, examine a block diagram of a generic motor drive including primary inputs and outputs, manual operators, and fixed and multipurpose analog and digital inputs and outputs. (Full Lecture)
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Use it. Don't steal it. Be cool.
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For more FREE online technical training check out the following playlists available at the bigbadtech channel:
DC Circuit Analysis • DC Circuit Analysis
Single Phase AC Circuit Analysis • Single Phase AC Circui...
3 Phase AC Circuit Analysis • 3 Phase AC Circuit Ana...
Hydraulics • Hydraulics and Electri...
Pneumatics • Pneumatics
Motor Control • Motor Control
Motors and Generators • Motors and Generators
Motor Drives/Variable Frequency Drives (VFD) • Motor Drives
Programmable Logic Controllers (PLCs) • Programmable Logic Con...
Thank you so much for making this video as well as taking the time to explain about the basic interface with all the different available connections that wires could go to.
I did a industrial machine removal of a large CNC panel saw (8000lbs) and got to keep the machine. Inside the electrical box were x2 Omron Sysdrive VFD that I salvaged hoping to use them for 5HP inverter motor but even after downloading the manual I only understood where the basic 1ph input / 3ph output and where to add a DC choke for adding noise filtering of the DC Bus 😅. Everything else was written as if the reader had taken a class on Omron’s VFD.
Looking forward to watching any other further in depth videos you make!
I really value your videos. Thank you for what you have done.
Thanks, please tell your friends about these free resources.
A free study guide for this lecture is available at: www.cgcc.edu/study-guides
It says access denied. Is it true that you can run a DC motor with AC voltage applied to the armature and DC voltage to the series/shunt field?
1) Let me check on that. Are you getting the error when you enter the website or when you try to download?
2) Yes ... but not well. That's kind of the principle of a universal motor. I'll explain in later lectures.
Mejia,
Link should be fixed. Give it a test.
It works!
@@bigbadtech just tried it, its not working
you are the best Big Boss
Thank you
Thanks a lot.. this explanation is superb!!
Thanx alot for this informative video
Outstanding lecture, Thank you
Thanks! Please tell your friends these free resources exist.
Awesome lecture 🙂
Great Video had my attention from start to finish. Look forward to more videos hopefully on VFD designing a simple 1 phase 220v 60 Hz to Three Phase 220 volt 60 hz converter with jelly beans parts. Common Mosfets and Op amps etc etc FYI You are the Alan from w2aew channel on analog circuits, Dave from eevblog on test equipotent and electronics. Roger from KainkaLabs on opensource and modifying stuff projects and circuits,etc etc Hope you do well on your channel. Best regards
Thanks for the kind words. Yes, once I finish AC circuit analysis I'd like to dive into power electronics.
Sir you are a great help
thanks Mr .
thanks you bro i like t motar drives instresting your ac drave
Great lecture
Hi Jim thanks for sharing this video.
You know it’s bad when I watch this shot for fun now
7:02 Another word is discrete.
Please put Video on DC Motor Drivers
Love it
nice.
'which as they say is yet another barrel of rage infected monkies I do not wish to open at this time.'
Jim, I have always wondered about the number of poles in a particular motor of mine. It is circa 1940, used for an ancient elevator. Name plate data shows 1) CYC - 60. 2) RPM - 750. With that info the only possibility is the synchronous speed for a 50Hz/8-pole motor. But given nameplate says 60 CYC and all other induction motors I've seen gives RPM with slip factored in I'm at a loss. If you have some time I would appreciate your thoughts. Thanks!
Old motor nameplates are the wild, wild west so no telling what you're dealing with without closer inspection. This being said, slip is typically factored in for motor nameplates(ie: nameplate rated speed occurs at rated torque and rated mechanical power). 8 poles per phase = 4 pole pairs per phase => at 60Hz this would be synchronous speed of 900rpm. At a rated speed of 750rpm this is a slip of 16.6% which is very very high (typically slip is less than 6%). Another crazy possibility might be that it could be a 4 pole pair per phase synchronous motor intended to operate at 50Hz? (but why would they put 60Hz on nameplate?) At 50Hz it would give you a synchronous speed of 750rpm (as you calculated) and, being synchronous rather than induction in nature, it would follow the rotating magnet field without slip. Hard to say. Anyways, stay in touch because I've got a whole bunch of motor content in the works. Until then check out this playlist: ruclips.net/video/SB8BTldMsO0/видео.html
Jim Pytel thanks for the thoughtful response. Since it is a elevator motor with a reduction gear, high temp rise, and 1.4 service factor I’ll bet it has a high slip speed.
Engineer Sir, the letters are too small can not seen by necked eyes
Quick engineer solution ... get a bigger screen!
Thanks! What measurement or meter can be used to check the output of a drive to a motor? If the drive has no bypass and the motor isn’t running on a call, would you check the frequency output?
Perhaps the easiest means would be the use of an AC voltmeter on the line to line (or line to neutral for that matter) of the connections leading from the drive to the motor. Even easier .. often the drive itself will display these properties and more without the use of an external meter.
Mr. Jim will you be doing a PID video?
Eventually ... all I've got now is material on open loop control at: ruclips.net/video/0qtSuQ8oYqg/видео.html
Im getting access denied when i click on link. I would really like to get your notes
I'm getting the same error! Let me get in touch with our website guy and fix this.
Michael,
The link should be fixed now. Give it a test.
Thanks. It works now
@@bigbadtech Have you redacted this link since?
Yes, publishing the notes on the school website quickly became a management nightmare. I'm publishing the notes in PressBooks now, however, I've only finished the notes for Hydraulics and Basic Electronics 2 and 3.
openoregon.pressbooks.pub/hydraulics/
openoregon.pressbooks.pub/electronics2/
openoregon.pressbooks.pub/electronics3/
Hi Jim Pytel
My name is Suradej,live in Bangkok Thailand.
Can you teach me how to select motor to match electric car or electric motorcycle?
You'll want to consulate someone that specializes in electric car and/or motorcycle design. These are not easy topics and the only advice I could give you would be very general.
@@bigbadtech ok Thank you
You can buy this vfd for your motor control clsss
Do you want to engineer my pump off grid application?
No. It might be a terribly interesting project however I'm going to have to decline the offer. Please check the FAQs at: ruclips.net/video/Do7VzDuB_Rc/видео.htmlm4s
"Untrained operators operating under the false assumption that they are trained operators".
Isn't this most operators? I think I've noticed that this is most operators.