Patent ID: 8686612
Filing Date: 2014-04-01
Classification: H02K

Abstract:
1. An electrical machine, wherein the electrical machine has a first number (k) of commutator laminates ( 10 , 12 , 14 ) and brushes ( 16 , 18 ), wherein the commutator laminates ( 10 , 12 , 14 ) are distributed uniformly in a circumferential direction on a circumference of a laminate support ( 24 ), characterized in that the brushes ( 16 , 18 ) are arranged such that commutation times are distributed as uniformly as possible in order to reduce the current ripple when using a wave winding and a quantity of the brushes ( 16 , 18 ) is less than the number of poles ( 2 p ) in the electrical machine; wherein the brushes ( 16 , 18 ) comprise a first brush pair ( 16 , 18 ), wherein a first circumferential angle α 1 exists between a first radial axis ( 20 ) of a first ( 16 ) of the brushes ( 16 , 18 ) in the first brush pair ( 16 , 18 ) and a second radial axis ( 22 ) of a second ( 18 ) of the brushes ( 16 , 18 ) in the first brush pair ( 16 , 18 ), the absolute magnitude abs (α 1 ) of which first circumferential angle α 1 differs from a brush nominal separation angle by no more than a tolerance angle α