What is Back EMF & what is its significance | DC Motor | TheElectricalGuy

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In this video, I'm discussing what is back emf or counter emf and what is its significance. We'll look at how it works with DC motors and why back emf is required in DC motor.
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#backemf #counteremf #dcmotor

Опубликовано:

26 апр 2023

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Комментарии : 44

@kennedymwila2100 Год назад

I clicked on the video by mistake. But I have really enjoyed the lecture. Well done

@GauravJ Год назад

Glad you liked it 👍🏻

@aliusef2912 10 месяцев назад

best explanation ever existed on DC motor starting current & back emf.

@GauravJ 10 месяцев назад

Thank you 😊

@boffotape914 22 дня назад

Very clear and neat explanation .

@a1kyam 4 месяца назад

Thank you very much sir ❤

@GauravJ 4 месяца назад

Most welcome

@trader573 Год назад

Interesting video indeed..🔥💯

@showmikalves5430 2 месяца назад

It was helpful...Thank you

@sisir22 15 дней назад

sir you are sparking the mind what we want to digest. ok so creative idea.

@sisir22 3 месяца назад

your lecture is very helpful to know the working principle of DC motor. thank you sir.

@GauravJ 3 месяца назад

You are most welcome

@ritas20 4 месяца назад

Great explanation, well done!

@GauravJ 4 месяца назад

Glad it was helpful!

@karthik77-5 Месяц назад

So what about whent it comes to a DC Generator, the back emf reduces the magnetic field like the back emf reduced the effect of supply voltage here?

@Who_was_That. Год назад

Thanks

@tobiasheemels6552 3 месяца назад

Many thanks, made it clear to me. How about AC motor, the same formula?

@vipinthampy4669 Год назад

Please do vedio on solar cell

@davem5392 7 месяцев назад

I think loosing the field while motor is running has big consequences related to this. Also if no field motor will not rotate I think it would be useful for you to explain this

@engrnaveed96 Год назад

Best

@uniquebeats5378 Год назад

More videos on dc Machines please ------ load characteristics

@GauravJ Год назад

Hello. I have a detailed course on DC machines.. you can check it out. Link is in the description

@mahershhab3824 9 месяцев назад

احتاج مساعده بمقابل مادي لو سمحت

@davidopperman6117 6 месяцев назад

Initial current won't be 50 amps because the coil has reactance

@JONASDJORBUAHTETTEY Год назад

If back emf is for DC motor what do we have in AC motor

@infinitebeing1119 3 месяца назад

Back EMF present in both AC and DC motors.

@sowmijadeja Год назад

what happens if Back EMF = Supply Voltage ?

@MohammadAsifAliBEE Год назад

Armature current will become zero, and therefore electromagnetic torque will also become zero.

@abdulqayyum4715 10 месяцев назад

Sir. What is fee of course of electrical for 6 months in Pakistani rupees?

@GauravJ 10 месяцев назад

Hi. You can check it on courses.theelectricalguy.in

@mahershhab3824 9 месяцев назад

I need some paid help, please

@mr.elliotanderson 3 месяца назад

whatever you told could be told in 5 minutes .....why you taken so long

@nkotoki 10 месяцев назад

what you are talking about is electricity only you can understand.

@mr.elliotanderson 3 месяца назад

whatever you told could be told in 5 minutes itself ...

@nicoledarling3538 7 месяцев назад

Very low on visual aids. You don't explain how to calculate back EMF on any system nor do you show nor the relation to speed and back EMF... Videos should be used to make information visual, not just to lecture.

@honestman276 Год назад

Despite that comment, I thank you much. Thanks from Bangladesh.

@bernardocisneros4402 Год назад

Very good video. Thank you! I have a question. I'm just getting started in electronics so I'm having trouble understanding the relationship between back EMF and inductive reactance. I assume back EMF is not the same as inductive reactance, but both work together in an AC circuit to oppose the flow and change in current. My question is: Are back EMF and inductive reactance the same thing or does back EMF oppose the change in current while inductive reactance opposes the flow of current?

@GauravJ Год назад

No. Back emf and inductive reactance are not the same. Back emf does not oppose the current.

@bernardocisneros4402 Год назад

@@GauravJ Thanks for the quick reply. I think I understand now. Back EMF opposes the supply voltage and that's why you subtract back EMF from supply voltage when calculating current with Ohm's law, but by increasing back EMF or inductive reactance you decrease current. Is this correct? If not, please recommend one or more of your videos that might clear this up for me. Thanks again!

@GauravJ Год назад

Yes, back emf opposes the supply voltage. That is correct. Now, inductive reactance will not come into picture in case of a dc motor. Inductive reactance is only applicable for AC (Alternating current) as it only opposes the change in current and not constant current (DC,). To have more clarity on it, you can check out my playlist on "AC circuit"

@bernardocisneros4402 Год назад

@@GauravJ Thanks for the explanation. I understand it now. Formula for inductive reactance is 2pifL and frequency in DC cicuit is zero so if you plug in zero for frequency in the inductive reactance formula the product is zero.