DC MACHINES

GATE QUESTIONS ON DC MACHINES By- MANISH KUMAR SHAKYA

ABOUT ME B.TECH WITH ELECTRICAL AND ELECTRONICS FROM KIET,GHAZIABAD IN 2012 CLEARED GATE,SBI AND IBPS BY- MANISH KUMAR SHAKYA FOLLOW ON- https://unacademy.com/user/ manishshakya-4406

TARGET AUDIENCE B.tech students of electrical branch Students who are preparing for gate Students who are preparing for engineering services examination Students who are preparing for various psu's Students who are preparing for RRB JE exam

COURSE OVERVIEW INTRODUCTION OF DC MACHINES TORQUE EQUATION EFFICIENCY OF DC MACHINES GATE QUESTIONS ON DC MACHINES GATE QUESTIONS ON DC MACHINES

A 44ON SHUNT MOTOR HAs ARMATURE RESIS TANCE OF 0-8 AND FIELD RESISTANCE 0f 2oo IF THE MOTOR IS DELIVERING ,46 KW AT 85% EffweNcy) THEN THE VALUE (b) 422.3y (d) 454-2 V (c) 42.5, 8 So Po O 85 44O

SHUNT ELD CURRENT 2.2 A R Roo RMATURE CURRENT 1.1.) = 1-1SH-19.95-22-1 -3A Ea= V-TaRaF 440-1143 X 0.8 = 425.8 y HENCE OPTION (C) S CORRECT. A 200Y SHUNT MOTOR V TH A CONSTANT MAIN fieLD S DRINING A LOAD WHose TORQUE VARIES As THe SQUARE 0c THE SPEED.IT DRAWS 30A WHILE RUNN AT Goonpm .T4A 2on RESIS TO RIS (ONNECTED , SERIES AIS WITH ARMATURE AND MOToR Loss Es ARE ASS UMED To B

NEGLIBLE THEN THE SPEED n) and ARMATURE CURRENT WILL BE (b) n= 260.5 rpm):Ta = 5.6G A (n-2oo. pm, Ta 433A (d) n= 180.5 Yprn ,-q= 6.22 A S LET THE ARMATURE RESIS TANCE Is NEG LIGIBLE AMD FIELD CURRENT IS NERY SMA CoMPARE THAN ARMATURE CURRENT So SIN CE THE fIELD CURRENT Is CONSTANT

200 = Kex 600 Al HEN ADDITIONAL Ress TAN CE 1s ADDED IN THE ARMATURE CIRLUIT bu 1) AND by (2 20O 600 _ nt

SoLY ING EQUATION Iq= 5.GC A HENCE OPTION (B) is CORRECT.

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Manish Shakya

I AM A SELF- STARTER WITH STRONG INTER PERSONAL SKILLS.I SEEK NEW CHALLENGES AND TRY TO THINK OUT OF THE BOX WHILE LOOKING FOR CREATIVE SOLU

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Nanda a

a year ago

making framework code will b #12N %18G ( u said @18G )

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