Patent ID: 7990009

Claim:
An electrical machine for conversion of electrical energy to mechanical energy and vice versa, the electrical machine comprising: a moving part comprising an inner rotor without windings, wherein the rotor comprises at least two magnetic conductors which are separated from one another axially such that a first and a second impeller wheel are formed; a stationary part comprising: a number of magnetically acting webs in the circumferential direction of the machine which are operatively connected to the magnetic conductors of the rotor, at least one first winding structure which is likewise operatively connected to the axially separated magnetic conductors of the rotor, and a second winding structure arranged on the webs, wherein either the first winding structure acts as an armature winding and the second winding structure acts as a field winding, or vice versa; wherein the first and the second impeller wheel are radially innerly magnetically effectively connected by a further magnetic conductor; wherein the stationary part has the number of webs corresponding to a number of poles in the machine, each having a radially inner web end and each having a radially outer web end, and wherein the first winding structure is in the form of a ring winding, and the second winding structure extends, considered radially, between the inner and the outer web ends; wherein the first winding structure is in the form of a ring winding coaxial with respect to a rotor axis; and wherein the second winding structure is in the form of a number of short-circuited windings, corresponding to the number of poles in the machine, between the first radially inner winding structure and the radially outer web ends.