#7 Synchronous Motors - Effect of Field current Changes on Synchronous Motor

[@surajadhikari5872]

its simple. The reason behind the decreasing delta angle is the increase in the magnitude of the Ea to maintain the Ea*Sin(delta) constant at every instant. And also when the field becomes stronger then then the locked-up becomes more stronger and then load angle=delta angle reduces.

[@ManishSingh-gx4tr]

Simplified and easy to understand phasor diagram Wonderfully explained sir

[@ElectricalisEasy]

thank you..

[@KMMizan-yr4nr]

sir, I loved the way you have explained every topic.

[@KvsPrasadarao]

Easy to understand V and inverted V curves. Thank you very much sir

[@jitendraprasadmuduli93]

Sir , as you told that as"If" increases , "Ea" also increases, so to maintain "Ef *sin (delta)" constant.....delta value has to be decreased to reduce overall "sin(delta)".

[@kulbeersingh9785]

When motor was in lag section, the inductive reactance was more due to which the Ia lag Ea by larger angle and angle between Ea and Estat is also large, as the field excitation increases stator inductive reactance decrease, so theta decrease which results in decrease of the angle between Ea and Estat.... Answer with reference to "4 Equivalent circuit of synchronous generator 7:00 "

[@shreyanshukumarjena7402]

This was a great video sir.... cleared all my doubts !!!

[@comandernehal8567]

Answering the open Question -: Ea sin(del) is constant. So if Ea is increasing then (del) has to be decreasing to keep constant value of Power

[@akifkhanafridi5223]

he mentioned that at 17:45

[@oneinabillion654]

Can't power also increase with flux?

[@AJ-et3vf]

Awesome video Sir! Thank you!

[@interestingchannel6914]

You are too good sir ji

[@savindersingh4523]

Angle delta is decreasing to maintain input power to be constant

[@anilkumarsaw5667]

Nice explanation sir

[@abdulqadeer297]

NICE EXPLANATION BY U SIR G THANKS..........

[@ElectricalisEasy]

Glad to be of help....please do consider sharing the videos also...,

[@MuhammadUsman-uw5wb]

very good lecture sir great

[@nikhille2444]

Thanks you sir nice explanation 👌

[@gustavomarcelo7250]

Sir.The topic for effect of load change or excitation change does not consider the presence of governor and voltage regulator,right?

[@heart_beat8444]

Thnq so much sir....... its very helpful

[@ElectricalisEasy]

Most welcome

[@pianoking9374]

Practically..if field curr increases the field get stronger and the attraction between rotor and stator poles increases...which tends to pull the rotor to make rotor field axis as close to stator rotating field axis and the angle between them viz delta reduces.....well I think so..i might be wrong...if it is wrong please correct me...I'll be thankful..😊

[@ElectricalisEasy]

No yr right..the stronger the field the stronger the locking

[@krunalprajapati7186]

If in a synchronous motor driving mechanical load and drawing current at lagging power factor from constant voltage supply if field excitation is increased then its power factor become ???

[@Neha...009]

How we can define power factor in synchronous motor ? I mean p.f is taken at the input terminal or the output terminal of the motor...

[@oneinabillion654]

Is power only dependent on load? Why not dependent on If?

[@SitBackAndRelaxPlz]

sir I think as the motor moves from lagging to leading it means reactive power consumption by the motor decreases so to satisfy this condition delta need to decrease??

[@arvindkumar-wj8np]

Sir exactly causes of reducing armature current is not clear what I do for clear concept???

[@mahmudulhasandip6308]

The answer is delta is decreasing because of Ea sin(delta)=constant all time to maintain it ,since Ea is increasing .

[@japneetsingh5015]

How the sign of reactive power was determined what is its meaning , please explain

[@mubinurrashidtahjib5222]

can you provide us the notes???

[@sayantanpaul2037]

Why Ea is always been drawn below V ?? What will happen if Ea is drawn above V ??

[@ElectricalisEasy]

I will get back to this in the weekly doubt clearing session...

[@malikuzair9947]

Thanks Sir

[@SitBackAndRelaxPlz]

thank you sir

[@sayantanpaul2037]

Why Ia is increasing when we are increasing excitation??

[@lamisamusharrat7138]

Want video on DC motor DC generator and induction motor

[@ElectricalisEasy]

You can find the DC machine course, and all the other courses in the playlist section : 1. DC machines: kzbin.info/aero/PLPpCFgQP7QKHUOFYvZhQ6ra5XrU3dN2dD 2. Induction motor: kzbin.info/aero/PLPpCFgQP7QKGLh0E_GU9fHs7YL-R6941u

[@khalidengineeringschool3476]

Ea is increasing . For that delta is decreasing.By this ,the speed of motor remain constant

[@Nanikumar-p5y]

Maintain power constant so ea increase s delta decrease s

[@ElectricalisEasy]

Yes as per equations...why don't u try to think about what hapoends physically in the machines

[@oneinabillion654]

Why is power constant? Why can't flux have an effect on it?

[@defryoctavio9552]

Could you give your videos a subtitle broo?

[@nageshhosagoudar616]

Why aren't you Telling first what is Ea and Vphi

[@ElectricalisEasy]

They have already been explained in previous videos..I would recommend you follow the playlist