Motor stator having transposed winding layers
First Claim
1. A method of winding a stator core of an electric machine having at least one pole pair, the method comprising the steps of:
- winding in successive order a predetermined number of individual layers of coiled wire strands on each pole of the pole pair so that each successive layer overlays a preceding layer radially from the respective pole; and
connecting in series each of said layers of a first pole of the pole pair with a layer of a second pole of the pole pair to obtain individual series coil connections on the pole pair equal in number to said number of layers, the connections inversely connecting an order of the first pole layers to an order of the second pole layers.
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Accused Products
Abstract
An electric motor is provided with a multi-layered winding stator core configuration. A plurality of individual layers of wire strands are successively formed on each stator pole of a pole pair. Each winding layer is fabricated of the same relatively thin wire gauge. A first layer is applied directly on a pole and each successive layer is assembled on top of the last previous layer. Each layer of one pole of the pole pair is connected in series with a layer of the other pole of the pole pair to obtain a number of individual series coil connections equal in number to the number of layers. As inductance and resistance characteristics of the layers differ from each other as the layers increase in distance from each pole, layers from one pole of the pole pair are connected to respective layers different in order from that of the other pole pair.
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Citations
15 Claims
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1. A method of winding a stator core of an electric machine having at least one pole pair, the method comprising the steps of:
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winding in successive order a predetermined number of individual layers of coiled wire strands on each pole of the pole pair so that each successive layer overlays a preceding layer radially from the respective pole; and connecting in series each of said layers of a first pole of the pole pair with a layer of a second pole of the pole pair to obtain individual series coil connections on the pole pair equal in number to said number of layers, the connections inversely connecting an order of the first pole layers to an order of the second pole layers. - View Dependent Claims (2, 3, 4)
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5. A machine stator comprising:
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a plurality of pole pairs, each pair having a plurality of coil layers wound on each pole of a core, said layers successively overlaying each other in position about the pole, the layers of a first said pole connected to layers of a second said pole in inverse order to the position of the respective layers about the poles, wherein each core has a pair of poles, and wherein each of the plurality of pole pairs comprises a ferromagnetic core segment that is ferromagnetically isolated from each of the other pole pairs.
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6. A machine stator comprising:
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a core having a pair of poles; a plurality of coil layers wound on each pole of said core, said layers successively overlaying each other in position about the pole, the layers of a first said pole connected to layers of a second said pole in inverse order to the position of the respective layers about the poles. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A method of winding a stator core of an electric machine having at least one pole pair, the method comprising the steps of:
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winding in successive order a predetermined number of individual layers of coiled wire strands on each pole of the pole pair segment so that each successive layer overlays the preceding layer; and connecting in series each of said layers of a first pole of the pole pair with a layer of a second pole of the pole pair to obtain individual series coil connections on the pole pair equal in number to said number of layers in inverse order to the position of the respective layers about the poles, wherein the machine stator comprises a plurality of pole pair segments that are separated and ferromagnetically isolated from each other, and said steps of winding and connecting are applied to each of the plurality of pole pair segments.
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15. A machine stator comprising:
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a plurality of pole pairs, each pair having a plurality of coil layers wound on each pole of a core, said layers successively overlaying each other in position about the pole, the layers of a first said pole connected to layers of a second said pole in inverse order to the position of the respective layers about the poles, wherein each core has a pair of poles, and wherein each of the plurality of pole pairs comprises a ferromagnetic core segment that is ferromagnetically isolated from each of the other pole pairs.
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Specification