Formula Pengukuran Effisiensi Indirect Method

Formula Perhitungan Effisiensi Indirect Method No

Deskripsi

A.

No Load

1

P input No Load

Motor Slip Ring

Pom

 ± Pt Pom = Pr  ±

2

R ug ugi Cu Cu St St at at or or No No Lo Lo ad ad (P Cu0 Stator)

P1Cu0

3 4 B.

R ug ugi Cu Cu R ot ot or or No No Lo Lo ad ad ( PCu0 Rotor) Actual No Load Losses Full Full Load/ Load/ Nom Nomin inal al

P2Cu0 Po

5

Taha Tahana nan n Stat Stator or / Roto Rotorr dala dalam m suhu suhu 75 75 C

 

      3 

Rugi Rugi Cu Stat Stator or Full Full Load Load / Nomi Nomina nall

7

Rugi Rugi Cu Roto Rotorr Ful Fulll Loa Load d / Nom Nomin inal al

8 9

Rugi Sikat / Brush Rugi – rugi Stray

10

E ff ffi si si en en si si

I 

2

 

      3 

P1Cu0 = 3 . Rstator . 

………… Po = Pom – P1Cuo - P2Cuo =

P1Cun 6

 ± Pt Pom = Pr  ±

P1Cu0 = 3 . R stator stator . 

R 75 75

o

Motor Sangkar

.

;  R=

=

=

Deskripsi

P2Cun =

P brush = 3 . 0,3 . I 2N P stray = 0,01 . Pn  Pn



 Pn  Po  P 1Cun  P 2Cun  Pbrush  Pstray

Motor Slip Ring & Motor Sangkar

1

Rugi Cu Stator Y

2

Rugi Cu Cu St Stator Delta

P1Cu = 3 . R 1 . 

3

P 12

P 12 = (Pr  ±  ± Pt ) - P1Cu

4

T starting

5

P1Cu = 3 . R 1 .

2 I1

  I 1      3 

T starting = P

12

Motor Dahlander

Rugi Cu High Speed Speed

P1Cu = 3 . (R 2 / 2 ) . I 12

Rugi Cu Low Speed Speed

P1Cu = 3 . 

2

/ 

2

T starting starting 220 V = (

  I 1    .   3 

3 2

. R 1

 ± Pt ) - P1Cu P 12 = (Pr  ±

P 12 T starting Low Speed T starting Low Speed 220 V 

2

) . T starting V

R stator atau R rotor 

  In       3 

Formula Perhitungan Perhitungan Torsi Starting Starting No

. ; R=

2

P1Cun = 3 . R 75 75 _stator .  

………….

P brush P stray

.

2

P1Cun = 3 . R 75 75 _stator .  

P2Cun

2

Po = Pom - P1Cu0

R stator atau R rotor 

  In       3 

I 

T starting = P 12 /  T starting = P 12 / 

=

Sn 1  Sn

. Pn

P stray = 0,01 . Pn  Pn  Pn  Po  P 1Cun  P 2Cun  Pstray

Perkiraan Grafik Hasil Percobaan Motor Induksi 3 Fasa

1. Grafik Karakteristik Effisiensi (Direct) 2. Grafik Karakteristik Kecepatan = f (Pout) N = f (T)

3. Grafik Karakteristik Arus Starting I st = f (V)

4. Grafik Karakteristik Kecepatan Saat Pengaturan Kecepatan N = f (R 2) atau N = f (Vs)