Power transfer unit of a system for inductive power transfer, a method of manufacturing a primary power transfer unit and of operating a primary power transfer unit
First Claim
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1. A power transfer unit of a system for inductive power transfer, wherein the power transfer unit comprises:
- a winding structure; and
at least one flux guiding means for guiding a magnetic flux of an electromagnetic field;
wherein the at least one flux guiding means comprises or provides at least one low reluctance section with a first reluctance and at least one high reluctance section with a second reluctance, wherein the second reluctance is higher than the first reluctance, wherein the at least one high reluctance section extends parallel to a lateral axis of the winding structure, wherein the lateral axis is an axis of a right-handed Cartesian coordinate system;
wherein a geometric centre or centreline of the at least one high reluctance section is arranged within a centre plane between two adjacent poles provided by the winding structure;
wherein the at least one high reluctance section is provided by a gap between two low reluctance sections, wherein the gap extends along a total width of the at least one flux guiding means;
wherein the winding structure comprises a first sub-winding and at least one second sub-winding, wherein a winding section of the first sub-winding and a winding section of the at least one second sub-winding extend parallel to each other and are arranged adjacent to each other within a common winding section, and the winding section of the first sub-winding and the winding section of the at least one second sub-winding extend along the lateral axis;
wherein the at least one high reluctance section is arranged under the common winding section; and
wherein the first sub-winding of the winding structure provides a pole if a current flows through the first sub-winding of the winding structure or the at least one second sub-winding of the winding structure provides a pole if a current flows through the at least one second sub-winding.
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Abstract
A power transfer unit of a system for inductive power transfer, wherein the power transfer unit includes a winding structure, and at least one flux guiding means for guiding a magnetic flux of the electromagnetic field, wherein the at least one flux guiding means provides at least one low reluctance section with a first reluctance and at least one high reluctance section with a second reluctance, and the second reluctance is higher than the first reluctance. Also, a method of manufacturing a power transfer unit and a method of operating a power transfer unit.
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Citations
11 Claims
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1. A power transfer unit of a system for inductive power transfer, wherein the power transfer unit comprises:
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a winding structure; and at least one flux guiding means for guiding a magnetic flux of an electromagnetic field; wherein the at least one flux guiding means comprises or provides at least one low reluctance section with a first reluctance and at least one high reluctance section with a second reluctance, wherein the second reluctance is higher than the first reluctance, wherein the at least one high reluctance section extends parallel to a lateral axis of the winding structure, wherein the lateral axis is an axis of a right-handed Cartesian coordinate system; wherein a geometric centre or centreline of the at least one high reluctance section is arranged within a centre plane between two adjacent poles provided by the winding structure; wherein the at least one high reluctance section is provided by a gap between two low reluctance sections, wherein the gap extends along a total width of the at least one flux guiding means; wherein the winding structure comprises a first sub-winding and at least one second sub-winding, wherein a winding section of the first sub-winding and a winding section of the at least one second sub-winding extend parallel to each other and are arranged adjacent to each other within a common winding section, and the winding section of the first sub-winding and the winding section of the at least one second sub-winding extend along the lateral axis; wherein the at least one high reluctance section is arranged under the common winding section; and wherein the first sub-winding of the winding structure provides a pole if a current flows through the first sub-winding of the winding structure or the at least one second sub-winding of the winding structure provides a pole if a current flows through the at least one second sub-winding. - View Dependent Claims (2, 3, 4, 5, 6, 7, 10, 11)
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8. A method of manufacturing a power transfer unit comprising the steps of:
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providing a winding structure; and providing at least one flux guiding means for guiding a magnetic flux of an electromagnetic field such that the at least one flux guiding means comprises or provides at least one low reluctance section with a first reluctance and at least one high reluctance section with a second reluctance, wherein the second reluctance is higher than the first reluctance, wherein the at least one high reluctance section extends parallel to a lateral axis of the winding structure, wherein the lateral axis is an axis of a right-handed Cartesian coordinate system; wherein a geometric centre or centreline of the at least one high reluctance section is arranged within a centre plane between two adjacent poles provided by the winding structure; wherein the at least one high reluctance section is provided by a gap between two low reluctance sections, wherein the gap extends along a total width of the flux guiding means; wherein the winding structure comprises a first sub-winding and at least one second sub-winding, wherein a winding section of the first sub-winding and a winding section of the at least one second sub-winding extend parallel to each other and are arranged adjacent to each other within a common winding section, and the winding section of the first sub-winding and the winding section of the at least one second sub-winding extend along the lateral axis; wherein the at least one high reluctance section is arranged under the common winding section; and wherein the first sub-winding of the winding structure provides a pole if a current flows through the first sub-winding or the at least one second sub-winding of the winding structure provides a pole if a current flows through the at least one second sub-winding. - View Dependent Claims (9)
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Specification