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US 7,732,967 B2Granted
Electrical machine comprising a winding system with coil groups
AssigneeSiemens Aktiengesellschaft
InventorsRolf Vollmer, Holger Schunk, Albrecht Storath
Life of this patent
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AssigneeSiemens Aktiengesellschaft
InventorsRolf Vollmer, Holger Schunk, Albrecht Storath
Estimating the term…
Disclosed is an electric machine (1) comprising a stator (2) that encompasses a winding system (10) with three winding branches, and a certain number of effective pole pairs. Each winding branch is provided with at least one coil group, each of which contains an even number of serially connected individual coils (11) that generate an individual magnetic field, respectively. Two respective individual coils (11) of a coil group are offset relative to each other in a circumferential direction of the stator (2) in such a way that the associated individual magnetic fields are provided with an offset electrical angle relative to one another at the sixth harmonic of the number of effective pole pairs, said offset electrical angle being equal to an odd multiple of 180°.
An electric machine, comprising a stator including a winding system having three winding phases, and a pole pair number, wherein each winding phase contains at least one coil group, with each coil group containing an even number of individual coils which are connected electrically in series and each induce an individual magnetic field, wherein two of the individual coils of each coil group are arranged offset with respect to one another in a circumferential direction of the stator in such a way that the associated individual magnetic fields in the sixth harmonic of the pole pair number have an electrical offset angle with respect to one another, with the angle being equal to an odd-numbered multiple of 180°, and wherein the stator includes a plurality of teeth, with only every second tooth being wound with one of the individual coils.
An electric machine, comprising a stator including a winding system having three winding phases, and a pole pair number, wherein each winding phase contains at least one coil group, with each coil group containing an even number of individual coils which are connected electrically in series and each induce an individual magnetic field, each individual coil in a coil group being wound in opposition to an individual coil that is next to it in a circumferential direction, wherein two of the individual coils of each coil group are arranged offset with respect to one another in a circumferential direction of the stator in such a way that the associated individual magnetic fields in the sixth harmonic of the pole pair number have an electrical offset angle with respect to one another, with the angle being equal to an odd-numbered multiple of 180°, and wherein the stator includes a plurality of teeth, with only every second tooth being wound with one of the individual coils.
Dependencies are inferred from the claim text.