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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