Coil for an electric machine and method for producing a coil
First Claim
1. A coil for an electric machine for conducting an electric current for generating a magnetic field, the coil comprising:
- individual turns which are embodied from a conductive sheet-metal strip material, and the turns are embodied generally as flat bodies of rectangular shape comprising two narrow sides and two long sides, in such a manner that a dense package with turns arranged one on top of the other is obtained, and each turn has at least one circumferential conductor track with the exception of at least one electrical interruption on one of the long sides resulting in a first end and a second end of the turn, and the conductor track of a turn at one location has an electrically conductive connection to a conductor track of an adjacent turn, wherein the turns are, apart from this, substantially electrically insulated from one another, and wherein a contact region for a current connection is provided at at least one end-side turn of the coil, wherein the contact region extends from one of the narrow sides of the end-side turn and provides a third end of the end-side turn and wherein the coil is adapted to be fittable onto a tooth of a star in the sense of an individual tooth coil, wherein a periphery of each tooth has a substantially constant outer diameter and wherein all the turns of the individual tooth coil are made narrower in the vicinity of a foot region of a tooth than in a shoulder region of a tooth and are sized to form an exposed groove with an adjacent coil, wherein an entirety of the exposed groove has a width which increases from the shoulder region to the foot region.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a coil (1), in particular for an electric machine, in particular a transformator or an electromechanical converter, in particular an electric motor, for guiding an electric current for producing a magnetic field. Said coil consists of individual windings (2) that are essentially embodied as a flat body thus obtaining a tightly packed structure when the windings (2) are superimposed, and respectively, each winding (2) comprises at least one circulating conductor path with the exception of at least one electric interruption on one side. Said conductor path of a winding (2) comprises, on one point, an electroconductive connection with a conductor path of an adjacent winding (2). The windings (2) are incidentally, essentially electrically isolated to each other.
10 Citations
21 Claims
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1. A coil for an electric machine for conducting an electric current for generating a magnetic field, the coil comprising:
individual turns which are embodied from a conductive sheet-metal strip material, and the turns are embodied generally as flat bodies of rectangular shape comprising two narrow sides and two long sides, in such a manner that a dense package with turns arranged one on top of the other is obtained, and each turn has at least one circumferential conductor track with the exception of at least one electrical interruption on one of the long sides resulting in a first end and a second end of the turn, and the conductor track of a turn at one location has an electrically conductive connection to a conductor track of an adjacent turn, wherein the turns are, apart from this, substantially electrically insulated from one another, and wherein a contact region for a current connection is provided at at least one end-side turn of the coil, wherein the contact region extends from one of the narrow sides of the end-side turn and provides a third end of the end-side turn and wherein the coil is adapted to be fittable onto a tooth of a star in the sense of an individual tooth coil, wherein a periphery of each tooth has a substantially constant outer diameter and wherein all the turns of the individual tooth coil are made narrower in the vicinity of a foot region of a tooth than in a shoulder region of a tooth and are sized to form an exposed groove with an adjacent coil, wherein an entirety of the exposed groove has a width which increases from the shoulder region to the foot region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A stator of an electromechanical converter with an internal rotor or external rotor, the stator comprising:
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at least one coil having individual turns which are embodied from a conductive sheet-metal strip material, and the turns are embodied generally as flat bodies of rectangular shape comprising two narrow sides and two long sides, in such a manner that a dense package with turns arranged one on top of the other is obtained, and each turn has at least one circumferential conductor track with the exception of at least one electrical interruption on one of the long sides, and the conductor track of a turn at one location has an electrically conductive connection to a conductor track of an adjacent turn, wherein the turns are, apart from this, substantially electrically insulated from one another, wherein a contact region for a current connection is provided at at least one end-side turn of the coil, wherein the contact region extends from one of the narrow sides of the end-side turn and provides a third end of the end-side turn, and a star yoke structure, wherein the coil is fitted onto a tooth of a star in the sense of an individual tooth coil, wherein a periphery of each tooth has a substantially constant outer diameter and wherein all the turns of the individual tooth coil are made narrower in the vicinity of a foot region of a tooth than in a shoulder region of a tooth and are sized to form an exposed groove with an adjacent coil, wherein an entirety of the exposed groove has a width which increases from the shoulder region to the foot region. - View Dependent Claims (17)
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18. A method for producing a coil, the method comprising:
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providing rectangular flat turns which are embodied from a conductive sheet-metal strip material and wherein each rectangular flat turn comprises two narrow sides and two long sides, and which have a gap-shaped interruption in one of the long sides, arranging the flat turns one on top of the other and in each case adjacent turns are connected by means of a conductive connection in the longitudinal region using a connecting method, assembling the coil outside the electric machine, including the electrically conductive connections between the turns, and subsequently inserting the coil into the electric machine, wherein a contact region for a current connection is provided at at least one end-side turn of the coil, wherein the contact region extends from one of the narrow sides of the end-side turn and provides a third end of the end-side turn and wherein the coil is adapted to be fittable onto a tooth of a star in the sense of an individual tooth coil, wherein a periphery of each tooth has a substantially constant outer diameter and wherein all the turns of the individual tooth coil are made narrower in the vicinity of a foot region of a tooth than in a shoulder region of a tooth and are sized to form an exposed groove with an adjacent coil, wherein an entirety of the exposed groove has a width which increases from the shoulder region to the foot region. - View Dependent Claims (19, 20)
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21. A method for producing a stator, the method comprising:
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providing at least one coil having individual turns which are embodied from a conductive sheet-metal strip material, and the turns are embodied generally as flat bodies of rectangular shape, wherein each rectangular flat turn comprises two narrow sides and two long sides, in such a manner that a dense package with turns arranged one on top of the other is obtained, and each turn has at least one circumferential conductor track with the exception of at least one electrical interruption on one of the long sides, and the conductor track of a turn at one location has an electrically conductive connection to a conductor track of an adjacent turn, wherein the turns are, apart from this, substantially electrically insulated from one another, and wherein a contact region for a current connection is provided at at least one end-side turn of the coil, wherein the contact region extends from of the narrow sides of the of the end-side turn and provides a third end of the end-side turn, and providing a star yoke structure, wherein the coil is formed by stacking up individual flat turns outside the stator and is soldered together in order to produce individual, electrically conductive connections in a groove region of the stator, and the coil is subsequently fitted as a coil package onto one tooth of a star of a star yoke structure in the sense of an individual tooth coil, wherein a periphery of each tooth has a substantially constant outer diameter, and subsequently after the fitting onto the star, the star is inserted into a yoke, wherein all the turns of the individual tooth coil are made narrower in the vicinity of a foot region of a tooth than in a shoulder region of a tooth and are sized to form an exposed groove with an adjacent coil, wherein an entirety of the exposed groove has a width which increases from the shoulder region to the foot region.
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Specification