Rotational Power and Energy Transmission | Efficiency | Gear Trains | Torque & Speed Ratios

LECTURE 25
ENGR 220 Playlist:
• ENGR 220: Statics and ...
This lecture was recorded on October 28, 2020. All retainable rights are claimed by Michael Swanbom.
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Thank you for your support!

[@Bendy-Bean]

I really admire the way you teach, you're very patient and understanding, and you use a variety of ways to help your students come to understand things

[@63Ducati1]

Shades of Richard Feynman! I never had the pleasure of taking a class from him, but his notes on physics that I read took things incomprehensible and made them simple. You Sir, have done the same thing. I learned the unit conversion method at Colorado School of Mines and appreciate the effort you go through to carry units throughout. I have a problem right now that relates to this lecture and will definitely listen a second time, maybe even a third! Well spoken, easy to understand (for those of us that are somewhat hard of hearing) and logical. Excellent. I still need something on linear dynamic simulation with SolidWorks Standard. Having not found it yet doesn't mean it doesn't exist. If it doesn't exist, I would implore you to do one if you can manage it. You have a way of instructing that fits me well. Regards.

[@dogansahutoglu2073]

wow all videos 196:) You are awesome in your work, Micheal.

[@VenkatachallamRP]

sir one error i spot out in this lecture the power of the motor you mentioned 20.306kw i think that was wrong 20.306 watt is the answer because One watt is equal to 1 Newton-meter per second (Nm/s) so the answer is 0.0272307946 hp motor you mentioned 27.23 hp motor am i right sir.

[@danieljoun219]

Thank you for sharing this!

[@erayyldrm423]

very helpful video thanks sir

[@calvindsouza7092]

Your doing a good job

[@TheBomPE]

Thanks for the encouragement! All the best to you!

[@nahomseifu5102]

Hello Good Sir! Thank you for posting this lecture. Where do you teach?

[@TheBomPE]

I'm glad you liked it! I teach at Louisiana Tech University. I teach online classes in the summer if you are interested in taking one of my courses for credit!

[@dionokeke2148]

Howdy! Are you still planning on posting a lecture on GD&T modifiers?

[@TheBomPE]

Yes! I'm sorry many of my plans have gotten delayed, but I will be teaching a GD&T class this spring, and I plan to do several more lectures, including modifiers. I like recording lectures for live, in-person classes when possible.

[@tintinfan007]

subscribed immediately

[@TheBomPE]

Nice to have you!

[@trailturkey]

You are a talented lecturer and your videos are excellent.
What software are you using to capture and present the solutions using a stylus?

[@TheBomPE]

Thank you so much for your kind words! I use Microsoft Onenote 2007. (It worked better back then, and it had customizable toolbars.) You also want a tablet PC with an active digitizer (Wacom makes the best ones). Thanks for watching!

[@daehyunpark3664]

@@TheBomPE Very good to know! Which tablet are you using? (windows tablet? Is that a surface pro?) -> I am interested in using it to create my personal engineering notes (I am a gear engineer), but struggling to find a proper one.

[@sandeeppatil9626]

hello sir,
thank you for the lecture & i like the way you teach very kind.
i have some question related to my work study
i have a motor pulley & ball screw mechanism.
motor power = 2.1 nm
ball screw force- axial force 3 kn
pulley ratio = 2 , (48:24)
moving load on lm guide is 2.7 kn
what will be axial force on ball screw shaft or on pulley.
if any more data required pls let me know

[@krishnakumar-gw9vd]

I have a question how to ask

[@vineetgupta7913]

Sir , is power supplied to gear 3 is also same?

[@apscafe]

Hello Sir, i hv learnt alot from you, now i need help in my research topic selection, i am a student of mphill mechanical engineering design

[@salehmohamed1981]

400 watt three phase 60 hz motor at 25 rpm I want it to pull a load capacity of 400kgf. How many N.M does this motor need to do this task?

[@TheBomPE]

If 400 watts is the max output, and it turns 25rpm, then P=T*omega would say that the max available torque would be 400W/(25rev/min*(2pi rad/rev)*(min/60s)) = 152.8 N*m. You would need to set up your rotation-to-linear-motion mechanism to transform that torque into the required force you indicate. Since I don't know your plans there (spool and cable? rack and pinion?...), it is hard to say anything more specific. Also, if 400W is the electrical power input, you will likely need to estimate the efficiency of the motor to estimate how much less power output the motor will have relative to power input.

[@salehmohamed1981]

@@TheBomPE Thank you so much