Calculation of starting characteristics for medium-sized motors with high-voltage in YKK series
Jing Yu · Dianji yu kongzhi xuebao · 2011
In order to obtain accurately the starting characteristics and starting period of medium-sized motors with high-voltage in YKK series and to determine the influence of the motors in starting on power grid,the dynamic mathematical model of three-phase induction motor was established based on the M-T coordinate system.The calculating method for stating characteristics of the motors was improved.Combined with the actual load data the starting characteristics of the motors in YKK series were calculated and the impact on motors when it reduced voltage starting were analyzed.Compared with the characteristic curve obtained by calculating method in steady state,dynamic characteristic curve accurately tallies with the actual situation.Calculation results provide more accurate references for designing and improving the medium-sized motors with high-voltage in YKK series and determine start-up mode.