Stator for a planar motor

Patent metadata

Field	Value
Publication number	US-11296571-B2
Application number	US-202017112046-A
Country	US
Kind code	B2
Filing date	Dec 4, 2020
Priority date	Jul 25, 2018
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

A stator assembly for driving a rotor of a planar electrical motor includes longitudinal stator layers with first coil conductors and inclined stator layers with second coil conductors. The first coil conductors extend in an elongated manner in a first direction, and the second coil conductors extend in an elongated manner in a second direction, different from the first direction. The longitudinal and inclined stator layers are arranged on top of one another in a third direction, oriented perpendicularly to the first and second direction. An uppermost and lowermost stator layer of the stator assembly are each formed as a longitudinal stator layer with first coil conductors. The longitudinal stator layers are arranged in the third direction at most on one side next to an inclined stator layer, and the inclined stator layers are arranged in the third direction at most on one side next to a longitudinal stator layer.

First claim

The invention claimed is:

1. A stator assembly for driving a rotor of an electrical planar motor, wherein the stator assembly comprises:
longitudinal stator layers having first coil conductors for interacting with first drive magnets of the rotor, and
inclined stator layers having second coil conductors for interaction with second drive magnets of the rotor,
wherein the first coil conductors extend in an elongated manner in a first direction,
wherein the second coil conductors extend in an elongated manner in a second direction different from the first direction,
the longitudinal stator layers and the inclined stator layers being arranged on top of one another in a third direction oriented perpendicularly to the first and second directions,

wherein an uppermost stator layer of the stator assembly and a lowermost stator layer of the stator assembly are each embodied as a longitudinal stator layer having first coil conductors,
wherein the longitudinal stator layers are arranged in the third direction at most on one side next to an inclined stator layer, and
wherein the inclined stator layers are arranged in the third direction at most on one side next to a longitudinal stator layer.

2. The stator assembly according to claim 1 , wherein a second uppermost stator layer of the stator assembly and a second lowermost stator layer of the stator assembly are each embodied as inclined stator layers having second coil conductors.

3. The stator assembly according to claim 1 ,
wherein the stator assembly comprises a first longitudinal stator layer and a second longitudinal stator layer, as well as a first inclined stator layer and a second inclined stator layer,
wherein the stator assembly comprises a first carrier plate extending in the first and second direction and a second carrier plate extending in the first and second direction,
wherein the first longitudinal stator layer is arranged on a first side of the first carrier plate and the first inclined stator layer is arranged on a second side of the first carrier plate opposite to the first side of the first carrier plate in the third direction,
wherein the second longitudinal stator layer is arranged on a first side of the second carrier plate and the second inclined stator layer is arranged on a second side of the second carrier plate opposite to the first side of the second carrier plate in the third direction,
wherein the second carrier plate is in the third direction arranged next to the first carrier plate and is aligned in parallel to the first carrier plate, and
wherein the second side of the first carrier plate is arranged facing the second side of the second carrier plate.

4. The stator assembly according to claim 3 ,
wherein the first carrier plate comprises a first vertical connecting structure and the second carrier plate comprises a second vertical connecting structure,
wherein the first vertical connecting structure extends in the third direction from the first side of the first carrier plate to the second side of the first carrier plate and electrically conductively connects a first coil conductor arranged on the first side of the first carrier plate to a first conductor structure arranged on the second side of the first carrier plate, and
wherein the second vertical connecting structure extends in the third direction from the second side of the second carrier plate to the first side of the second carrier plate and electrically conductively connects a first coil conductor arranged on the first side of the second carrier plate to a second conductor structure arranged on the second side of the second carrier plate.

5. The stator assembly according to claim 4 ,
wherein the stator assembly comprises a third vertical connecting structure, and
wherein the third vertical connecting structure electrically conductively connects a first coil conductor arranged on the first side of the first carrier plate to a third conductor structure arranged on the second side of the second carrier plate.

6. The stator assembly according to claim 5 , wherein the third vertical connecting structure comprises a through-hole extending in the third direction from an upper side of the stator assembly to a bottom side of the stator assembly.

7. The stator assembly according to claim 4 ,
wherein the stator assembly comprises further carrier plates extending in the first and second direction,
wherein the further carrier plates each have a first side and a second side opposite to the first side in the third direction,
wherein a longitudinal stator layer is respectively arranged on the first side of the further carrier plates and an inclined stator layer is respectively arranged on the second side of the further carrier plates,
wherein the first carrier plate, the second carrier plate and the further carrier plates are arranged side by side and are aligned in parallel to each other in the third direction, and
wherein facing sides of carrier plates arranged next to one another are alternatingly embodied as facing first sides or as facing second sides in the third direction.

8. The stator assembly according to claim 1 ,
wherein the stator assembly comprises at least two longitudinal stator layers having first coil conductors and at least three inclined stator layers having second coil conductors,
wherein all inclined stator layers are arranged next to one another in the third direction, and
wherein a first part of the longitudinal stator layers is in the third direction arranged next to one another and above the inclined stator layers and a second part of the longitudinal stator layers is in the third direction arranged next to one another and below the inclined stator layers.

9. The stator assembly according to claim 8 , wherein the first part of the longitudinal stator layers and the second part of the longitudinal stator layers comprise an equal number of longitudinal stator layers.

10. The stator assembly according to claim 1 , wherein the first direction and the second direction are oriented perpendicularly to each other.

11. The stator assembly according to claim 1 , wherein in the third direction the longitudinal stator layers and the inclined stator layers have the same central distance from a stator surface of the stator assembly.

12. The stator assembly according to claim 1 , wherein a first total number of longitudinal stator layers corresponds to a second total number of inclined stator layers.

13. The stator assembly according to claim 1 ,
wherein the first coil conductors are arranged on top of one another and in parallel to each other in the third direction, and
wherein the second coil conductors are arranged on top of one another and in parallel to one another in the third direction.

14. The stator assembly according to claim 13 ,
wherein first coil conductors arranged on top of one another in the third direction are each electrically conductively connected to one another in such a way that a similar coil current flows in each of the first coil conductors positioned on top of one another, and
wherein second coil conductors arranged on top of one another in the third direction are each electrically conductively connected to one another in such a way that an identical coil current flows in each of the second coil conductors positioned on top of one another.

15. The stator assembly according to claim 14 ,
wherein the first coil conductors arranged on top of one another are each electrically connected in series, and
wherein the second coil conductors arranged on top of one another are each electrically connected in series.

Assignees

• Beckhoff Automation Gmbh

Inventors

• Brinkmann Rolf
• Bentfeld Lukas
• Prüssmeier Uwe

Classifications

• H02K3/47 Primary

  Air-gap windings, i.e. iron-free windings · CPC title

• H02K41/031 Primary

  of the permanent magnet type · CPC title

• H02K2201/18

  Machines moving with multiple degrees of freedom · CPC title