Grade 8 - Ang Katamaran ngm ga Pilipino ni Dr. JoseRizal
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LESSON LESSON PLAN Sub: ELECTRICAL MACHINES-II Staf name: k.srinivasuu
s.n ! 1
II B.TECH IISEM
T!"i# UNIT – I
T!ta n! !$ #asses
SINGLE SINGLE PHASE PHASE TRANSF TRANSFORM ORMERS ERS –
01
CONSTRUCTION & OPERATION:
2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18
19
20 21 22 23
24
25 26
Single phase transformers-types – constructional details-minimization of hystersis and eddy current losses-emf equation – oper operat atio ion n on no load oad and and on load load - phas phasor or diag diagra ram ms - Equi Equiva vale lent nt cir circui cuit - losse ossess and and efficiency-regulationAll day day effi effici cien ency cy - effe effect ct of vari variat atio ions ns of frequency & supply voltage on iron losses.
UNIT
–
II
TEST TESTIN ING G
OF
SING SINGLE LE
PHAS PHASE E
TRANSFORMER AND AUTOTRANSFORMER:
OC and SC tests - Sumpners test predetermination of efficiency and regulationseparation of losses test parallel operation !ith equal and unequal voltage ratios – auto transformers-equivalent circuit – comparison !ith t!o !inding transformers.
UNIT
-
III
POLYPH POLYPHASE ASE
POLYP POLYPHAS HASE E
03 02 03
02 02 03 03
TRANSFORMERS: TRANSFORMERS:
"olyphase transformers - "olyphase connections #$#% #$∆% ∆$#% ∆$∆ and open ∆% hird harmonics in phase voltagesthree !inding transformers-tertiary !indingsdete determ rmin inat atio ion n of 'p% 'p% 's and and 't tran transi sien ents ts in s!itching – off off load oad and and on load load tap tap chan changi ging ng(( Scot Scottt connection.
UNIT–IV
01 02
INDUCTIO INDUCTION N
03 03 02 01
MOTORS MOTORS::
"olyphase induction motors-construction details of cage and !ound rotor machines production of a rotating magnetic field - principle of operation rotor emf and rotor frequency - rotor reactance% roto rotorr curr curren entt and and pf at stan stands dsti till ll and and duri during ng operation)ot )otor po!e po!err inpu inputt% rot rotor copp copper er loss oss and and mecha echani nica call po!e po!err deve develo lope ped d and and thei theirr inte inter r relationtorque equation-deduction from torque equation – e*pr e*pres essi sions ons for for ma*i ma*imu mum m torq torque ue and and star starti ting ng torque – torque slip characteristic
02 02 02
04
03
02
27 28
UNIT – V
CHARACTERISTICS OF INDUCTION
+ou,le cage and deep ,ar rotors equivalent circuit – phasor diagram - cra!ling and cogging. Circle Circle diagram diagram-no -no load load and ,loce ,loced d rotor rotor teststests-
02
MOTORS:
29 30 31
02 04
Remarks
LESSON PLAN II B.TECH IISEM Sub: ELECTRICAL MACHINES-II Staf name: k.srinivasuu 32 predetermination of performance-methods of starting and starting current and torque calculations 33 34 UNIT – VI
35 36 37
SPEED CONTROL METHODS:
Speed control-change of frequency( change of poles and methods of consequent poles( cascade connectioninection of an emf into rotor circuit /qualitative treatment only0-induction generator-principle of operation.