Electrical Machines Full Premium Lecture Notes

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 flux
• 2. 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 connection
• 2. 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 braking
• 2. Plugging
• 3. 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 method
• 2. Potier method ( Or ) ZPF method
• 3. MMF method
• 4. American standard association
• Motor 
• 1. V- curve
• 2. Inverted V- curve
• Synchronous 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 IM
• 2. 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 starting
• 2. Auto – Xr start
• Star- Delta starting
• Real torque- slip characteristics of 3-ø IM
• Braking of 3- ø IM
• 1. Regenerative braking
• 2. Plugging
• 3. Dynamic / rheostatic braking
• Speed control of 3- ø IM
• 1. Voltage content
• 2. Rotor resistance control
• 3. Slip frequency rotor voltage injection
• 4. 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