Introduction to Electrically Controlled Systems (Full Lecture)

In this lesson we'll take an introductory look at electrically controlled systems and discuss the advantages, applications, and characteristics of such systems.We'll discuss the differences between pilot and primary signals, switches and sensors, hardwired relay based ladder logic and programmable logic controllers and introduce basic ladder logic diagrams.

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[bigbadtech]

ERROR at 15:09 and redrawn at 21:09. Note the control transformer must be connected upstream of the magnetic M contactor not downstream of it as indicated in the diagram. Thanks to John Stillman for pointing this out.

[roseelectronics]

Jim's teaching style is elgant above all! Whenever I want to learn something, I come back to Jim.

[CptnMurff]

Absolutely Perfect Lectures! I have all my Apprentice Operators and Electricians study your YouTube Lessons. They're a great jump starting tool for their understanding. Thank You and keep up the good work!

[jschlesinger]

Prof Pytel, I like to watch your videos when I'm feeding my infant son. I appreciate your clear and often humorous explainations and examples; in fact, It's often a struggle too contain my laughter and thus avoid startling my son when you use hyperbolic examples to illustrate some phenomenon. Thanks for putting this together and sharing them with the world.

[autocalcs]

Absolutely amazing lecture bring theories (both electrical & hydraulic) and practices together. Thanks!

[rickwilliams]

Incredible refresher courses for me plus so much more!!! You are gifted Jim...Not all "instructors" can instruct. Thanks for taking the time for us.

[jasblick]

Very well made content. Well laid out and taught.

[burakayan]

awesome lecture thank you for teaching us.

[kobipeeri]

Just great !!! English is not my mother language, yet, I can understand you very well. Thanks

[donberg]

I have been working in the aerospace industry & I don't understand why they don't use the ladder diagram schematic for flight controls, they use something called "Lamm" diagrams which are a hybrid pictorial/electronic symboligy. Ladder diagrams would make sense for hydraulics used in flight controls.

[djleonard]

Your Video's are awesome, Thank you so much, It clears so much up on what some incompetent teachers here in OZ cant teach.

[richardjayasinghe]

Superb lecture I never ever heard before.
Sir can you explain how do operater operate the throttle and speed engine or pilot put on switch and aircraft win flap. How they operate electrically hydraulic or pneumatic system.
Please help us to understand this.
Thanks.

[beckyschwantes]

You have done a lot of intros! Now we need to do some more complicated motor control circuits and a dive into automating a VFD via digital io .
Do you have anything on sink and source pnp and I can always figure out how to get the switch working when they send me the wrong one but I don’t completely understand. Most prox switches now are two wire but I still see a lot of photo eyes that come in 3 and 4 wire configuration.

[IgorMiklos]

I like your videos, informative, smart and for sleeping purposes - perfect xD big fan

[danielberhanu]

Greetings Mr. Pytel,

First and for most, I would like to express my gratitude to your kind and humble effort to sharing your knowledge and expertise. 

In this footage at the time frame 16:03 you indicate a control transformed driving a 3phase motor. The schematic drawing indicates that two of the 3 phases of the line-to-line voltage is being utilized as input to the primary coil of the control transformer.

My question is shouldn't all the three phase line-to-line phases be used via contractor. Doesn't 3phase require all the three phase line-to-line phases via contractor ?

Your prompt feedback is well appreciated.

[johnc]

Thanks again Jim. Enjoy your break. I see you're closing in on 500 subscribers. By the way, those little dots that appear and disappear, usually in the lower right of your graph, are they random or are you sending some secret message?

[AaronB]

Seems like transistors have been able to do the control function since the 50s or 60s. Controlling a large amount of current with a small amount of current, and isolated from the power circuit. The mechanical approach with solenoids seems like the best you could do before semiconductors, but obviously they are still around. I’m just a hobbyist with some background in using transistors but now starting a class in motor controls. The contactors seem big and bulky for what they do.

[darrenredrum]

"teenage run away that expects a stiff reward" 8:00 🤔

[lekashameti]

The pace in this lecture was slower, thus better.

[nathanieltalker]

Great, but I think the hydraulic system analogy confused me. I feel that by sticking to electricity alone it would be much more clear. But as I said loved the video thank you very much.