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ID number:396114
 
Author:
Evaluation:
Published: 03.01.2019.
Language: Latvian
Level: College/University
Literature: n/a
References: Not used
Time period viewed: 2016 - 2020 years
Extract

5.6. Pīķstrāvas (smailstrāvas) noteikšana (6. uzdevums)
Dots: piectonnīgam celtnim ir 3 dzinēji:
1. 11 kW;
2. 3,3 kW;
3. 13 kW.
Lielākās jaudas dzinēja nominālā strāva In= 22 A, palaišanas strāva Ipal.= 88 A, visiem dzinējiem OP=25%. Darba spriegums ir 380 V.
Noteikt: piectonnīga celtņa radīto pīķstrāvu.
Atrisinājums.
1. Pēc atbilstošām tabulām vai līknēm atrod izmantošanas koeficientu kizm un jaudas
koeficientu cosφ, šinī gadījumā kizm=0,35 un cosφ=0,75.
2. Nominālā strāva visjaudīgākajam dzinējam:
…

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