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Electrical Machines Scanned Lecture Notes (Covers Entire Syllabus) - 2015 Edition
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Electrical Machines Scanned Lecture Notes (Covers Entire Syllabus) - 2015 Edition
Electrical Machines Full Premium Lecture Notes, Covers Entire Syllabus. Useful for Electrical Engineers, Specially for Candidates appearing for GATE Exams.

Content :
  • Transformers
  • Lenz law and faraday’s  law
  • Electrical machines
  • Quasi- Static Field
    1. Leakage flux2. Core flux (Or) Mutual flux
  • Open ckt Test (OC test)
  • Short-circuit test ( SC test )
  • Voltage regulation
  • Approximate regulation
  • All day efficiency (Or ) Energy efficiency
  • 2 wdg Xr with same material
    1. Additive connection2. Subtractive connection
  • Tertiary winding
  • British convention
  • 3-ø transformer connection
  • Vee connection ( or ) open delta connection
  • Parallel operation of Xrs 
  • Magnetising current phenomenon
  • DC Machines
  • Max power O/P for motor
  • Armature reaction
  • Compensating winding
  • Shunt generators
  • Series generators
  • Compounded generators
  • Shunt dc motors
  • Braking
    1. Regenerative braking2. Plugging3. Dynamic ( Rheostatic) braking
  • Speed control
  • Armature resistance control
  • Terminal voltage speed control method
  • Torque and power limits
  • Wand leonand system
  • Induced EMF equation
  • Distributive wdng / belt / breadth / spread factor
  • Open circuit test and sc test
  • Hydel generators
  • Regulation of alternator
    1. Regulation by EMF method2. Potier method ( Or ) ZPF method3. MMF method4. American standard association
  • Motor 
    1. V- curve2. Inverted V- curveSynchronous condenser or Reactor
  • Parallel operation of generators
  • Synchronous condenser or motor at load
    1. Synchronous power and co-efficient
  • Underexcited generator
  • Overexcited salient pole motor
  • Under excited salient pole motor
  • Slip test
  • Constant flux linkage theorem
  • Induction Machines
    1. Equivalent ckt of 3-ø IM2. MMF balance on load
  • Thevinins equivalent model ( steinmetz )
  • Circle diagram
    1. Data from no load test ( OC test )2. Data from SC test  ( Blocked rotor test ) 
  • Starting of 3- ø IM
    1. Direct on-line starting2. Auto – Xr start
  • Star- Delta starting
  • Real torque- slip characteristics of 3-ø IM
  • Braking of 3- ø IM
    1. Regenerative braking2. Plugging3. Dynamic / rheostatic braking
  • Speed control of 3- ø IM
    1. Voltage content2. Rotor resistance control3. Slip frequency rotor voltage injection4. Variable voltage variable frequency (VVVF) control
  • Speed control below base speed
  • Speed control above base speed
  • Crawling
  • Cogging
  • Double revolving field theory
  • Torque – slip characteristics
  • Equivalent ckt at standstill
  • Resistance start split phase motor
  • Shaded pole motor
  • Self starting synchronous relvetance motor
  • Hysterises motor
  • Stepper motor
  • Transformer
  • DC machines
  • BIL Approach
  • Classification of DC machines
  • Power balance or power flow in Dc machines
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