1- amaliy mashg’ulot. Transformatorlarning parametrlarini hisoblash

Yechish
Mustaqil uyg’otishli o‘zgarmas tok motorning texnik ma’lumotlari kuyidagicha: Nominal quvvati P= 3 kVt; nominal kuchlanishi U= 160 V; Yakor chulg’ami karshiligi R_ya= 1.2 om; Uyg’otish chulg’ami karshiligi R_u =32 om; Uyg’otish chulg’ami kuchlanishi U_u= 60 B; Mexanik va magnit ispoflar nominal quvvatning 4,5% ni tashkil etadi.

Quyidagilar aniqlansin:

1) Generatorning EYuKi-E

2) Generatorning yuklamasi nominal bo’lgandagi foydali ish koeffisienti

Yechish. Generatorning EYuKi:

Ye=U+I_ya∙R_ya

Generatorning istemol toki

I_ya=I

Generatorning nominal toki

I₁=P/U= 3000/160= 18.8 A

u holda

E=160+ 19∙1.20=182.5 B

Nominal rejimda Generatorning FIK:

;

bu yerda R-generatordagi quvvat ispofi yig’indisi

;

Uygotish zanjipidagi quvvat ispofi

P_y=U_y²/R_y= 602/32= 112.5 Vt

Yakor chulg’amidagi quvvat ispofi

P_ya=I_ya²∙R_ya= 19∙1.20=422 Vt

Shapt buyicha

P_mex+P_mag=0,045∙Pn=0,045∙ 3= 0.1

Generatorning istemol quvvati

=3.0+0.11+0.42+0.14= 3.7 kBt

Generatorning foydali ish koeffisienti 3.0/ 3.7=0.818