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US 6,628,031 B2Granted
Harmonic-frequency synchronous machine with flux concentration
AssigneeSiemens Aktiengesellschaft
InventorRolf Vollmer
Life of this patent
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Abstract
An electric synchronous machine with improved torque characteristic has a stator and a rotor, wherein the stator includes a winding, preferably a three-phase AC winding, with an average coil width τsp. The rotor is provided with permanent magnets and has a pole pair number of 2p with a pole pitch width τp, wherein the pitch ratio τsp/τp is ≧2.5.
Claims15
An electric synchronous machine, comprising:
- a stator having a winding with an average coil width τsp;
- a rotor having a pole pair number 2p with a pole pitch width τp;
- and
- permanent magnets attached to the rotor,
- wherein a pitch ratio τsp/τp is greater than or equal to 2.5.
2 more elements
Dependencies are inferred from the claim text.