Motor Poles and RPM Explained 

You are welcome!

You're very welcome Carlos!

@@TimWilborne *SIR VERY VERY INFORMATIVE VIDEO IN JUST **3:20**sec*

Glad it helped!

You're welcome!

You need to make sure what you have but it sounds like a 3 phase motor, you'll need a rotary phase converter, see link below. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-k9tR9d3DsqY.html

Glad it was helpful!

You are welcome!

@@TimWilborne I have a crank with magnets on its pulley. The magnets are turning around a 6 pole 18 slots stator that charges a 12v battery after going through a rectifier that keeps the voltage controlled since the crank turns 12,000rpm. I was thinking about rewinding the stator into a hub motor adding a second battery and a controller in order to recharge the 12v battery and the 2nd battery and also drive the crank or boost its torque when I flip a switch for 10 seconds. Will this work? What are the main difficulties of such system?

You are welcome

I'm not sure. Here's a video of my kids did adding magnets to a motor to make a generator, I'm still not sure I understand the optimal placement. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-15xdirMzPoo.html

Thank you. Let me know if you have any ideas for new videos!

@@ARTOFPATIENCE That is out is the realm of this channel. Check out some of the engineering channels out there.

The formulas and 50 Hz information is at the link below. twcontrols.com/lessons/motor-poles-amp-rpm

You are most welcome Aziza.

You are welcome!

You are very welcome

That wouldn't be an AC motor like we are talking about in this video. It is likely overeating because of an incompatible voltage or too much load

@TimWilborne thank you . I have 530 phase amps going into a 2800 watt motor @ 86-100.8 volts . Maybe need a bigger motor? 🤔 I found out last night . Thanks for the idea !

You are most welcome

rpm = frequency * 60 / (pole pairs) So lets say your frequency is 60Hz, and you have 10 poles (= 5 pole pairs), your rpm = 360

Thanks for subbing!

The 1800RPM (1725) have all those windings in SERIES (AFAIK), thus to TOTAL bulk winding volume is about the same AFAIK. (it is just getting split, distributed among more locations around the circle... I'm not sure about the smaller rotor size: but there are two things maybe going on there: In the 3450 RPM induction motor, the armature field is going THROUGH THE CENTER, and in the 1725 RPM motor it is going in 4 'semi-circles', sort of 4 arcs. thus a longer distance (larger rotor) will separate the stator's adjacent poles more, to go through enough metal in the rotor before exiting the rotor again to another(s) other pole... You mentioned Baldor, and the video is implying inductions motors, so he didn't include slip in the discussion. Only synchronous motors run at the calculated values (motors with a PM rotor or defined discrete poles). On an induction motor, the magnetization occurs anywhere around the surface, and is generated by currents 'induced' by the slippage. (if it didn't slip, the rotor would NOT be magnetized into poles!). Standard '3600rpm' motors have a slip of 150rpm (relative) giving 3450 RPM speed. Standard '1800rjpm' motors slip 75rpm yielding 1725 RPM operation... Mr K L [ I apologize if others already said this, no time to look; I'm working on Taxes LOL]

So nice of you

I don't know and would guess that there are many more variables that would determine that Daniel.

Hi Kurt. That fan uses a DC motor which is different than the AC poles and RPMs that this video is talking about. I probably should touch on DC motors sometime.

12-36V, I'm guessing you are talking DC? Not possible.

Thanks!

It depends on your field current and armature voltage. I don't have the hardware to make a good video on that.

Yes, but poles will always be even when talking about RPM

Thanks Jai Singh!

Yes it is

@@TimWilborne thanks a lot boss

Thanks

It depends on your field current and armature voltage. I don't have the hardware to make a good video on that.

@@TimWilborne I mean as a principle when you calculate the rad/s runner speed with given rpm and different sets pole pairs

Not sure, great question!

Thanks!

Is that a K?

It isn't a matter of which one is better, it is a matter of which one meets the requirements for your speed. Figure out what blade speed you need and work your way back to the motor.

@@TimWilborne if I use a ratio pulley to get the required rpm,which is better between low rpm with higher torque or high rpm which is closer to the required rpm ?

@@farhozz There won't be a big difference.

@@TimWilborne Thank you very much sir

Correct, the rotor doesn't really have windings.

Neither, star and delta wiring has to do with what voltage you are connecting to the motor.

If I'm connecting 80v battery with a Delta double Star connection could it be possible to double or step up the output voltage with those connection? If not how can I double my battery output for a higher voltage motor

Check the motor nameplate.

@@TimWilborne noted... Thanks

@@TimWilborne Pls , kindly advise what determines the higher Rpm and lower Rpm of an electric motor. Is it the number of turns or the connection at which the poles are connected or the both?

No

You are welcome.

That's a little out of the scope of this channel. Google "calculating motor turns". On second thought, that might be a fun one to do with the kids. Maybe we'll make a homemade motor.

Not sure, out of my league.

Yes, stick a few more numbers in there and you have the formula. RPM = Hz* (2 / poles) * 60 twcontrols.com/lessons/motor-poles-amp-rpm

One is north and the opposite is south... alternating 60 times a second 60 Hz electricity

Yes, I would hate for him to RECTIFY me! ru-vid.com/show-UCJ0-OtVpF0wOKEqT2Z1HEtA

Thank you!

I'm not following what you are asking

@@TimWilborne 2 pole motor ore 4 pole, do you need a special esc? I. Saw someone wase. Explaining that esc for 2 pole motor Nother esc for 4 pole motor what the hell is that

@@manush1119 Is ESC an abbreviation for something? I'm still not following you.

@@TimWilborne 2pole motor ore 4 pole motor. Do I need to change esc to run them ore. Use same as I use. On my regular brushless

Some of the abbreviations you are using are not translating.

Thanks!

You could but it would be a bad idea. The compressor itself probably isn't rated for the higher RPM.

@@TimWilborne which is higher rpm? 4 or 2 poles

@@romnellejohnco5887 At 60Hz, 2 Pole is 3600 rpm and 4 pole is 1800 rpm.

@@TimWilborne thank you sir. I learned

@@romnellejohnco5887 You are welcome.

Not following your question.

Motor speed is proportional to Hz. So if you have a base rpm of 1800 at 60 Hz then 1800*200/60 would be 6000 rpm. However your motor would burn up shortly after getting there if it even managed to. Torque falls off as Hz increases, bearings aren't rated for it, and the motor windings will overheat. I hope this was a philosophical question.

@@TimWilborne Am working on Ev and i have a few queries about those motors, can we discuss this via email or WhatsApp? Aumecycle@gmail.com

Torque output requires higher current draw. In a 2 pole motor there will be gaps where flux is not at it peak due to the rise and fall of ac sinewaves. Torque is strongest around the center of each pole when energized. This area is called the torque angle. The more poles there are the more torque angles exist thus increasing torque. To achieve higher torque at 2 pole, the motor would have to be rebuilt to withstand the current draw i.e. increasing turns, wire gauge, wires on hand, redesigning for higher voltage, or wiring in delta; or a combination of each.

@@Zapgod Nifty. Thank you for the answer. I thought that may be the case but I am limited on this field of knowledge.

Hz is part of the RPM equation, so the lower 50 Hz will run at a lower RPM. See details at the following link. Why not 6000? Because the bearings wouldn't hold up. twcontrols.com/lessons/motor-poles-amp-rpm

No not in this case. We're talking about alternating current in this video. There is no positive and negative.

@@TimWilborne I know.

Thanks

A lagging power factor won't affect the speed of an AC motor but as your motor is put under a higher demand you will get slip which is what is required to produce more torque. Both power factors and slip are fascinating subjects, I might have to come up with a creative way to show them.

Yes, they are out there.

Revolutions per minute

@@TimWilborne thx

@@varietygamerbd3661 You are welcome.

Yep

See if this video helps. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-9wMgos1kN1s.html

Whoa that is a lot of poles! You can probably see that rotating without any blur. RPM = Hz* (2 / poles) * 60 RPM = 60 * 2/60 = 120 rpm at 60 hz

dc emf motor

holy crap, people make ac motors because they need to be paid for more complex ac motors explaining