Plugging Circuits (Full Lecture)

[@teejteejwano9642]

Awesome, thanks very much!

[@michaelcostello6991]

Great video. Had to really concentrate on the ladder logic which is really good stuff. Thanks

[@subhajitroy1419]

Khub valo video

[@donberg01]

Mr. Pytel, I am following your courses and find them very informative you are doing a great job but I am still confused as to what is the major difference between a plugging motor & a jogging motor? It seems they are doing the same motion back & forth at small increments according to the operator?

[@bigbadtech]

+D. G. jogging = brief movements in same direction, plugging = instantaneous reversal

[@donberg01]

That simple! Probably why I didn't get it!

[@burakayan3360]

Hallo Sir, I have a question about phase reversing and brakes. The moment we reverse the phase, the direction of supply voltage for brake is also changing. I mean, at first, the line to line voltage of brake is L1 to L2 and then it becomes, L2 to L1. Does the brake still function ? is there a possiblity for magnetic forces to appyl counter force on springs ?

[@bigbadtech]

Good question. As illustrated the brake would also experience a phase swap during a plugging operation. This however isn't an issue for brake functionality because it operates using an AC solenoid where polarity does not influence direction of operation. This being said there is an extremely (extremely) brief transition period between the "instantaneous" reversal where the brake solenoid is de-energized when the F contactor opens and the R contactor has yet to close. I'll discuss this in later lectures on semiconductor devices and circuits but there's a practical limit to the operational speed of an electro-mechanical device because physical components need to move. Check out the "door bell" I make at the end of the control relay lecture. kzbin.info/www/bejne/iYWueWmIpZyljpo It's open and closing at some maximum frequency dictated by the repeated opening and closing of the contacts that have mass and must accelerate, break contact, decelerate, reverse, accelerate, make contact, bounce and make contact, etc. You can even see the arc forming during the opening. This is a sure fire way to destroy this device. Semiconductor devices in contrast like thyristors in a solid state contactor have no moving parts and can allow and disallow conduction at extremely fast speeds and switch simultaneously (or nearly so). Hoping to discuss these devices in later lectures.

[@burakayan3360]

@@bigbadtech thank you sir. that was really helpfull. İ am grateful for your attention.

[@IanSGI]

Do you slow your videos down before publishing? I listen to them in 1.25 times speed just so you sound like you aren't speaking through molasses. But my perception might be biased because because normally listen to your videos in 2.0 times speed, and only reduce the speed to 1.25 times when I need to hear something really clearly to understand the concept.

[@bigbadtech]

Honestly pacing a lecture is the one nut I've yet to properly crack. I'm with you. For most purposes I find myself listening to ALL videos and audio at 1.25 to 1.5X the recorded speed, especially audio books. For every person that says I'm too slow there is another person that says I'm too fast. For this reason I tend to pace the lectures a little slower than I'd prefer and allow the user to step up and step down the playback rate as they see fit. There are a lot of users that speak english as a second language and they seem to appreciate the slower delivery. This being said ... it's impossible to please everyone! Glad you're making use of this content.

[@farzadzebardast7192]

@@bigbadtech Thanks for your consideration