7/25/2019 P3.21 TA

1/3

P3.21 Study of Industrial Motors

Topic: Electric motors conversion of electric energy into mechanical energy

DC and AC motors

Learning objectives:

1) dentify the constr!ction and operating principles of DC motor "sh!nt arrangement) and

AC motor "single phase ind!ction)

#) nvestigate tor$!e%speed characteristics and pea& po'er deliverable and other

performance parameters ( match to act!al mechanical applications

*) +nderstand common starting methods for motors

,roject sched!le "'rite on 'hiteboard)

-1.#: DC motors

-*./: AC motors

-0: ndivid!al CA "02)

-3: 4ro!p report "02)

5efore starting the e6periment7 go thro!gh ris& assessment and sign8 Enco!rage participation for

all members in the circ!it connection8

7/25/2019 P3.21 TA

2/3

Lesson 1: DC motors

1) 9ideo: operations of DC motor7 sh!nt and series motor7 bac& emf ind!ced "d!e to change

in fl!6 at different positions of rotor): co!nteract for'ard emf steady state achieved for

constant speed !sed for fan7 conveyor belt

#) Diagrams of sh!nt and series motor in circ!its "'ith and ; of 'indings)

*)

7/25/2019 P3.21 TA

3/3

s the rotor turns %being belt-coupled to the driving motor&, a voltage is

induced in the rotor bars, and the resulting eddy currents react with the

magnetic #eld causing the stator to turn. The electrodynamometer is

calibrated in 'ewton-meters %'m&.

/) DC motor starter: protect=safeg!ard motor>s circ!it by limiting starting c!rrent "other'iselarge and damaging) thro!gh !sing resistance