LOW-INDUCTIVE BUS BAR SYSTEM FOR INTERGRATED AC DRIVE WITH MATRIX FREQUENCY CONVERTER

摘要

Invention refers to electrical techniques and it can be used in electrical drives. The bi-directional switches 7, 8, 9, 10, 11, 12, 13, 14, 15 of the matrix converter are divided in to three input bi-directional switch groups 16, 17, 18 and each bi-directional switch group 16, 17, 18 is placed on a separate bus bar construction top segment 23, 25, 27 depending on input phase. The bus bar construction top segments 23, 25, 27 are mede of multilayer PCB. The bi-directional switches 7, 8, 9, 10, 11, 12, 13, 14, 15 are placed on bus bar construction top segment 23, 25, 27 top layers. The bottom layers. The bottom layers are connected to the corresponding connections of the bi-directional switches 7, 8, 9, 10, 11, 12, 13, 14, 15 and form the three phase inputs 1, 2, 3 of the matrix converter. Inner layers are used for interconnection of the outputs of the converter 19, 20, 21. The bus bar construction is made of bus bar construction segments 23, 24, 25, 26, 27, 28 and insulating material 22 between different phase segments to electrically separate different phase bus bar construction top segments 23, 25, 27 form bus bar construction bottom segments 24, 26, 28. Bus bar construction segments of the same phase are connected together via segment connection 29.