METHOD FOR DETERMINATION OF IMPREGNATION COEFFICIENT FOR ELECTRICAL MACHINES COILS Russian patent published in 2014 - IPC H02K15/12 

FIELD: electricity.

SUBSTANCE: invention relates to electric engineering and namely to method for determination of impregnation coefficient for coils of electrical machines connected in star with insulated neutral. According to the method for determination of impregnation coefficient for coils of electrical machines characterising degree of filling by impregnating compound of coil cavities for each coil in this batch electrical parameters are measured before impregnation and after impregnation and drying; among selected electrical parameters there are capacities of two phases of star-connected coil, which are measured in turn before impregnation C_BI12, C_BI13, C_BI23 and after impregnation C_AI12, C_AI13, C_AI23 in regard to the ground; thereafter by measurement results impregnation coefficient is defined for each two phases K_IMP12, K_IMP13, K_IMP23 by mathematical relationship, then impregnation coefficients are defined for each phase of coil by mathematical relationships.

EFFECT: possibility to define the averaged impregnation coefficient and distribution of impregnating compound among phases of coil thus increasing informativity and accuracy of control.

2 tbl, 3 dwg