Again one another great presentation

Awesome 👏

Thank you well understood

Thank you well understood

Very Nice how getting -10 v 0 volt and +10 v how can built

Thank you so much professor Jim Pytel

Start at 6:00

❤

Amazing ❤

Thank you for the lecture. I was disappointed you didn't come around explaining how the phase shift in generator could be greater than 90°. I assume it's like in the electrical properties of induction motor video, you mention we stick to the electrical model with a resistance and an inductance. Then when going from no load to breakdown, we saw the impedances change and therefore the phase shift reduce but without being given an intuitive explanation for it. Is there one or is there no easy shortcut and I should get into the most complicated electrical model than you showed in the motor video ? Thanks !

I have been working on a Hurst Hydraulic pump for myself that wouldn't put out but 3,000 psi. They are pretty closely related to an Enerpac I do believe, and I did find out it's a 10,000 psi pump with 5,000 max prv. They are nothing like any of these KZbin videos and they are very hard, to impossible to find info on. I have owned and wrenced heavy equipment for 30 years and I have never seen anything like them. They have 2 open piston pump submerged in the tank with a rotating cam in the center. They are 2 stages, yet those those piston pumps are the same volume and pressure. They use a directional hand valve to close the loop to dump and supply the actuator, and then they dump through a manifold with a type of unloader that can dump a little and send some pressure back to the pumps assisting them with creating the 2nd lower volume high pressure stage. Or the valve can open a little farther and can dump all pressure back to tank unpressurized. When the directional valve is dumped it just shoots everything back to tank. I found the spring in the unloader to be broken. Someone apparently had it too tight because even with a broken spring it still wouldn't unload and was stalling the engine. Or it could be that the spring broke and it was unloading all the time and they tightened it way up thinking it was the prv. Either way, I couldn't find that spring or valve so I made an angled spacer to fit where the end of the spring was broken off. I bumped up the prv and started backing down the unloader and I am getting 5,000 psi now, about 6,000 at crack, but its still tugging on the 5hp Honda pretty good. But it was choking it plumb off. Everytime I back down the unloader it helps a little, but if I go too far it will just unload everything to the tank, no pressure will even make it to the actuator. The popet spool has an undercut that has to center up while resisting spring pressure. Too far either way under full load and you will have poor performance. Its time consuming because the one big difference is all adjustments are submerged in the tank, unlike Enerpac. Guess they didn't want joe blow fireman turning sets, and changing pressures. It's a strange little unit but I think im figuring it out.

You said this wasn't a math class, but in 2 minutes, you taught me more math than a year of highschool! You have an excellent way of explaining things!

I've watched this lecture a thousand times. It's my go-to for explaining the basic function of a Relay to my technicians because even they sometimes make dumb mistakes. Thank you, Jim.

Thanks very much for the comprehensive info. Gave me so much information about the variable vane pump in my Amada HA250 bandsaw 👍👍

Did you ever do the sensorless vector control method detail video? Im drying to understand the difference between that and V/F control.

17:02 why is T not equal to 12, but instead 13?

You are a great instructor. Thanks

Draw the primery resistance reduced voltage motor starter with out timer and with indicating lights

Thank you for this video. I can understand the motor wiring

Thank you. Very good video!

I have no choice as its actually and assignment I have complete for my EE level 3 :(

Nice one. Struggling a bit with manning's equation and solving for various things. Would be nice to see more about how to manipulate for variables to the power of 2/3 and such

How to test SC ,OC of three phase transformer by using Megger?

DUDE AWESOME VIDEO

Talking ladder logic, but the schematics is wiring not ladder logic...

I find the comment at the end rather annoying. If I knew what I what I was doing I wouldn't need the lecture or the lab.

Excellent!

for the pilot operated relief valves, doesn't the orifice in the spool always ensure that the pressure is the same on both sides even if the pilot is opened to tank?

DFIG PFM hahaha, great explanation thanks !

useless radians :(

How to connect a motor in division 0

These lectures are amazing, Jim. Thank you so much!

I found a vid of yours as I was trying to figure out what's a good PRV value for my beloved 1956 Fordson Major's new loader hydraulics. By now I've watched several videos and I'm excited to learn more. Thanks for making these vids, mate. They are great! Cheers from Sweden

Metric is convinient.

pressure is speed....flow is force. thanks😎😎😎😎😎

👍🏻👍🏻👍🏻

Very useful primer to PLC's, many thanks!

"...button pushing unbecoming of a technician..." that statement is electrically Shakespearian...

"what did you learn from the video?" "If you accelerate a motor too fast it will rip your balls off" - me

Thank you, that was great. (I was high watching it)

do you have examples for actuator speed that is pushing/pulling a load? or do these calculations apply regardless since the fluid is assumed incompressible?

I'm here after being confused in my first lab lol 💀

Hello. Late to the game, but I am a learner. An amplifier board needs +/- VDC. How does a bench PSU supply this? Are there + and - leads/outputs? Thanks!

Great video, this would be considered ladder schematic diagram not ladder logic correct? Ladder logic is a PLC language

What software did you use to draw your schematics?

Thank you for your lecture! Still helpful 6 years later

Hey man, ive watched probably half of your videos. Ive got a closed center purporional valve and am tryibg to wet uo the system. You were the first person i heard suggest to use pressure sensor to kill motor when pressure is built. Do you have a schematic or is there a good place to find more info? I think I've managed to watch all of the hydraulic and electric Control playlist and still haven't seen a good idea on how to set this up

I just stumbled from a random corner of the internet. Sticking with the lectures though

Thank you

Hey Jim, I love your videos. However I've noticed that when talking about apparent power you say the formula is the complex conjugate of the voltage times the current. but you write that its the voltage times the complex conjugate of the current. I believe the latter is the correct formula, but please correct me if I'm wrong!