Patent ID: 9252645
Filing Date: 2016-02-02
CPC Classification: H02K,H02P,Y02E

Claim Text:
1. A dc electrical machine comprising: a rotor comprising Np rotating field poles; an armature comprising Ns winding slots, where Ns/Np is a non-integer ratio; an armature winding comprising a plurality of coils received in the winding slots, the armature winding defining a plurality of armature phases; and a power electronic switching assembly comprising: wherein each coil is connected to the ac terminals of a respective switching module, and wherein a first proportion of the plurality of switching modules have their dc terminals connected together in series between the first dc load terminal and the second dc load terminal, and a second proportion of the plurality of switching modules have their dc terminals connected together in series between the first dc load terminal and the second dc load terminal to define two parallel dc circuits.