Patent ID: 7851963
Filing Date: 2010-12-14
Classification: H02K

Abstract:
1. A rotor of an electrical machine, particularly a driving motor for a hermetically enclosed refrigerant compressor with a body comprising a magnetically conductive material, the rotor having a plurality of axially extending slots, which are filled with an electrically conductive material, wherein an extension section of a first group of slots extends further radially inwards than a second group of slots, and that between two slots of the first group at least one slot of the second group must be arranged, a first flow cross-section being formed between neighbouring extension sections at the circumferentially shortest distance (a) between the two extension sections, a second flow cross-section being formed between neighbouring slots at the circumferentially shortest distance (b) between the slots, the first flow cross-section corresponding to the sum of the second flow cross-sections between the two slots of the first group, wherein in the radial direction the slots of the first group are 20% to 50% longer than the slots of the second group.