bro,actually this concept is comes from moment of inertia (dw/dt)=1/j(T-T1);since torque is dec. so (dw/dt)=negetive;means w is decresing (here w,j,T,T1 is speed,moment of inertia and torques respectively) this is concept behind ur doubt i hope u'll clear

bomb bnayega kya

CMON CMON nhi yaar Bathrooms Bana lo apny leye pehly

I AM ISRO well said...

Right

Subham Mondal exactly bro this guy is a real.shit

Ur question is geniune , as armature current increases, torque induced increases, this induced torque becomes > torque due to load. And speed increases, but go further, as speed increases , back emf also increases , which reduces the armature current , and hence induced torque again decreases till it becomes equal to torque due to load , but at higher speed... Thus in this overall process , speed increases but torque induced remains same...hope dat answer da question..🙂

let me explain u.......the load is constant .........load is not changing.........only input are changes........because of change in input............the load is still same .........load is constant here..........thats why speed and torque decreases at same time

but while finding the speed torque relation we took power constant only

Shubham Jalwal

Exactly ,I too have the same doubt

me too

There are two torques available , one is due to load and other is induced torque , prop to flux and armature current.. here induced torque is always directly prop to speed in case of DC motors, when ind. torque > torque due to load , speed increases , and it z obvious from even machines inertia point of view... hope dat answer da question..🙂

load waha constant h bro...listen carefully...load jab constant rehta h to waha ye relation fail hojata h

Same question from my side bhai

as we know generated torque is proportional to flux & armature current.in other hand e=v-(armature current*armature resistance).if armature current increases ,e will decrease.as e is proportional to n,thus increase in generated torque results in decrease in speed.

hey you are right but he is asking about both are decreasing .it should not be like that

Sir.. Your lecture say that torque and speed directly related.. I think you just don't mind that..

He is talking about load torque

They both are dependent on Power, Case 1: Power is constant, If speed increase then torque decrease or vice versa. Case 2: When power is not constant, Here the case where the input voltage decreases, As V decrease I decrease - because they are proportional. So net power decreases. In this case both torque and speed decrease.(NOTE : THIS IS THE ANSWER TO YOUR QUESTION, BOTH Tg and N decreases because the net power decreases).

siR please dc motor control by thiyetar ka ak video dal do

Thanks sir

dear esme kuch mistakes huye h mujhse...