Patent ID: 9698633
Date: 2017-07-04
CPC Classifications: H02K

Claim:
1. An electromechanical transducer, comprising: a rotor selected from the group consisting of a disk shaped rotor and an annular rotor and having a rotor axis; permanent magnets disposed in or on said rotor in a concentrically radiant manner; at least two stators disposed at both sides of said rotor and having stator backs, said stators formed at least partially of a soft magnetic material, each of said stators having a first stator section with radially outer supporting bars defining first magnetic active faces of said stator being opposite said rotor and a second stator section with radially inner supporting bars defining second magnetic active faces of said stator being opposite said rotor, each of said stators having an annular winding groove formed therein between said first and second stator sections for receiving at least one winding, said radially inner and outer supporting bars are each disposed in an annular manner and each extend parallel to said rotor axis in a direction of said rotor; said first and second magnetic active faces of said stators are end faces of projections which are equally spaced to one other and which protrude from said radially inner and outer supporting bars in the direction of said rotor, said projections respectively disposed on said radially outer supporting bars being offset at an angle in relation to said projections being respectively provided on said radially inner supporting bars in respect of a projection spacing by half a pitch, and in at least one of the stators, said projections which are provided on said radially outer supporting bars and/or said projections which are provided on said radially inner supporting bars overlap at least partially over said winding groove in a radial direction so that said winding groove is provided between said stator backs, which hold said supporting bars, wherein said projections defining an air gap therebetween in said projections extending parallel to a circumferential direction of said rotor, respectively; and a radius, in which said radially inner supporting bars are spaced to a rotation axis of the electromechanical transducer is larger than a radial extent of said first and second magnetic active faces of said stators.