HANDWRITTEN NOTES

Tuesday, June 15, 2021

EMF equation in DC machine

 


in this video i explain you

derivation of emf in dc machine
derivation of emf in dc motor
derivation of emf in dc generator
expression of emf in dc machine

question-a 4 pole ,1200 rpm dc lap wound generator has 1520 Conductors if the flux per pole is 0.01 webre the emf of generator is

Monday, June 14, 2021

transformer is working at its full load and its efficiency is also maximum at which iron loss is 1000 w then its copper loss at half of full load will be

 


transformer is working at its full load and its efficiency is also maximum at which iron loss is 1000 w then its copper loss at half of full load will be

if copper loss of a transformer at 7/ 8 th of full load is 4900 watt, then it full load copper loss would be

 if copper loss of a transformer at 7/ 8 th of full load is 4900  watt, then it full load copper loss would be


Transformer on no load

 

in this video I will explain you
1. what is no load condition of transformer
2. Working of Transformer on no load
3. no load current of transformer
4. phasor diagram of Transformer at no load
5. formula of magnetising current
6. value of no load current
7. value of no load power factor

question- in case of a power transformer the no load current in terms of rated current is



Sunday, June 13, 2021

Conservator tank in transformer

 


in this video I will explain you
1. what is the role of the conservator tank in the Transformer
2. working of the Conservator tank in transformer
3. role of the conservator tank in transformer
4. types of Conservator tank
5. where Conservator tank is connected to transformer
6. different parts of Conservator tank of transformer

question- the purpose of Conservator in transformer

Interpoles in DC machine

 


in this video I will explain you
1. what is interpoles in DC machine
2. what are the main function of Interpoles
3. interpoles in DC Generator
4. interpoles in DC motor

question- interpoles are meant for

What does the hysteresis curve area represent

 


in this video I will explain you
1. what does the area of hysteresis curve represent
2. hysteresis curve area for soft magnetic material
3. hysteresis curve area for hard magnetic material
4. hysteresis curve area for Air core