Electrical machines Definition and 12 Threads

I have been studying the representation of generators in power flow studies and I would appreciate your comments in this thread. From the book Fitzgerald & Kingsley's Electric Machinery, I understand that there are unsaturated and saturated reactances. In section 5.3.2 of the book it is said...

Hi guys, can someone please have a look at the following problem that I am struggling with; An 8.25 kW shunt DC motor is supplied with a terminal DC voltage of 300 V. The armature resistance of the motor Ra is 0.25 ohms, and the field resistance Rf is 40 ohms. The field winding consists of 1500...

I want to study "Electrical Machines" Course. I looked for online courses but they all had different prerequisites to study "Electrical Machines" course. Can anyone guide me about what prerequisites are needed to study "Electrical Machines" or any specific contents that i should study (e-book or...

Hi. I am preparing for IES (Indian Engineering Services ) exam. I have basic knowledge of electrical machines both ac and dc. For the examination point of view I need to have in depth knowledge of each and every topic in electrical machines (both ac and dc). Can you suggest me some really good...

Homework Statement What are the effects of changing the speed of alternator? (elctrical synchronus generator) Homework Equations Ns=120*f/p; p-poles f-frequency Ns-synch speed E=4.44*f*phi*T phi-max flux linkage T-turns f-freq E- generated voltage The Attempt at a Solution from the above...

An 8.25 kW shunt DC motor is supplied with a terminal DC voltage of 300 V. The armature resistance of the motor Ra is 0.25 , and the field resistance Rf is 40 . The field winding consists of 1500 turns. An adjustable resistance Radj is connected in series to the field winding. Radj may be...

am doing a comparative study of induction motors (both single and three phase) based on cost, size, efficiency,etc... while analyzing 1/4Hp and 5 HP motors, i read that 1/4HP motor has high slip than 5HP motor because 1/4HP motor has greater rotor winding resistance than 5HP...so efficiency is...

hello, i am an undergraduate student pursuing engineering. kindly suggest me a good book on electrical machines (induction motors, dc motors ,etc) so that they can be understood very easily . please suggest as fast as possible :cool:

hi! i want to couple the 2 A.C. machines mechanically so i need a software to work out on this can anyone help me please...

Homework Statement A three phase, 6-pole, \Delta connected induction motor is rated 208V, 60Hz. It has R_R\,=\,5.2\,\Omega, R_S\,=\,2.2\,\Omega, X_m\,=\,220\,\Omega, X_{lr}\,=\,7.5\,\Omega, X_{ls}\,=\,2.3\,\Omega. Calculate the starting torque and both phase and line currents when the motor...

I am looking for a book on electrical machines. I am particularly interested in one which would described the behaviour of the magnetic field inside the machine during various operating conditions like no load short circuit etc. can you recommend a book or a website which would describe it I...

Hello Guys, I am a beginner in the field of Electrical well i have certain queries to ask from u genius guys 1):WHY THERE IS NO BACK EMF in 3-phase INDUCTION MOTOR 2):WHY WE REMOVE RHEOSTAT after 3-5 seconds of STATRTING OF 3-pahse INDUCTION MOTOR. 3):IF WE APPLY SINGLE PHASE ,THEN HOW...