Stator and conductor connections for a planar motor

Patent metadata

Field	Value
Publication number	US-11936273-B2
Application number	US-202017121219-A
Country	US
Kind code	B2
Filing date	Dec 14, 2020
Priority date	Jul 25, 2018
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

A stator assembly for a planar electrical motor includes coil conductors arranged in a stator layer, elongated in a first direction and arranged side by side in a second direction perpendicular to the first direction. The coil conductors are connected to form a three-phase system, with a first forward conductor and first return conductor of the first phase connected in series to the first forward conductor, a second forward conductor and second return conductor of the second phase connected in series with the second forward conductor, and a third forward conductor and third return conductor of the third phase connected in series with the third forward conductor. The three-phase system has first and second opposite sides. The first forward conductor and the first return conductor are electroconductively connected in series by first and second horizontal connecting conductors arranged in the stator layer on the second and first side, respectively.

First claim

What is claimed is:

1. A stator assembly for driving a rotor of an electrical planar motor,
wherein the stator assembly comprises:
coil conductors arranged in a stator layer of the stator assembly,
wherein the coil conductors extend in an elongated manner a first direction and are arranged side by side in a second direction oriented perpendicularly with regard to the first direction,
wherein the coil conductors are connected on the stator assembly to form a three-phase system having a first phase U, a second phase V and a third phase W, and
wherein the coil conductors are configured as a first forward conductor and as a first return conductor of the first phase U connected in series with the first forward conductor, as a second forward conductor and as a second return conductor of the second phase V connected in series with the second forward conductor and as a third forward conductor and as a third return conductor of the third phase W connected in series with the third forward conductor;

wherein the three-phase system has a first side and a second side opposite to the first side,
wherein the first forward conductor and the first return conductor are electroconductively connected in series by a first horizontal connecting conductor arranged in the stator layer and at the second side of the three-phase system, and
wherein the second forward conductor and the second return conductor are electroconductively connected in series by a second horizontal connecting conductor arranged in the stator layer and at the first side of the three-phase system.

2. The stator assembly according to claim 1 ,
wherein the third forward conductor and the third return conductor are electroconductively connected to each other by a third horizontal connecting conductor arranged at the second side of the three-phase system,
wherein the third horizontal connecting conductor is arranged in a neighboring stator layer arranged adjacent to the stator layer,
wherein the third forward conductor is electroconductively connected to the third horizontal connecting conductor via a first vertical connecting conductor, and
wherein the third return conductor is electroconductively connected to the third horizontal connecting conductor via a second vertical connecting conductor.

3. The stator assembly according to claim 2 ,
wherein the stator assembly comprises a two-layer carrier plate,
wherein the stator layer is arranged on a first side of the carrier plate and the neighboring stator layer is arranged on a second side of the carrier plate, and
wherein the first vertical connecting conductor and the second vertical connecting conductor each extend from the first side of the carrier plate to the second side of the carrier plate.

4. The stator assembly according to claim 1 ,
wherein the stator assembly comprises a first connection structure for feeding in the first phase U and a second connection structure for feeding in the second phase V,
wherein the first forward conductor is electroconductively connected in the stator layer to a third vertical connecting conductor arranged on the first side,
wherein the first forward conductor is electroconductively connected to the first connection structure via the third vertical connecting conductor,
wherein the first return conductor is electroconductively connected in the stator layer to a fourth vertical connecting conductor arranged on the first side,
wherein the first return conductor is electroconductively connected via the fourth vertical connecting conductor to a neutral point of the three-phase system,
wherein the second forward conductor is electroconductively connected in the stator layer to a fifth vertical connecting conductor arranged at the second side,
wherein the second forward conductor is electroconductively connected to the neutral point via the fifth vertical connecting conductor,
wherein the second return conductor is electroconductively connected in the stator layer to a sixth vertical connecting conductor arranged at the second side, and
wherein the second return conductor is electroconductively connected to the second connection structure via the sixth vertical connecting conductor.

5. The stator assembly according to claim 4 ,
wherein the first connection structure and the second connection structure are arranged on the first side of the three-phase system,
wherein the stator assembly comprises a connecting stator layer,
wherein the connecting stator layer comprises a further first forward conductor of the first phase U, a further first return conductor of the first phase U and a further second forward conductor of the second phase V,
wherein the first connection structure in the connecting stator layer is electroconductively connected to the further first forward conductor and the second connection structure in the connecting stator layer is electroconductively connected to the further second forward conductor,
wherein the further first forward conductor is electroconductively connected to the further first return conductor by a further first horizontal connecting conductor arranged in the connecting stator layer and at the second side of the three-phase system, and
wherein the further second forward conductor is electroconductively connected to the sixth vertical connecting conductor at the second side of the three-phase system.

6. The stator assembly according to claim 4 ,
wherein stator assembly comprises a further second return conductor of the second phase V,
wherein the further second return conductor is electroconductively connected to the fifth vertical connecting conductor at the second side of the three-phase system,
wherein the further second return conductor is electroconductively connected to the neutral point of the three-phase system at the first side of the three-phase system via a seventh vertical connecting conductor, and
wherein the further second return conductor is arranged in the connecting stator layer and is electroconductively connected to the seventh vertical connecting conductor in the connecting stator layer.

7. The stator assembly according to claim 4 , wherein the neutral point of the three-phase system is arranged in the neighboring stator layer.

8. A stator assembly for driving a rotor of an electrical planar motor, wherein the stator assembly comprises:
coil conductors arranged in a stator layer of the stator assembly;
wherein the coil conductors extend in an elongated manner a first direction and are arranged side by side in a second direction oriented perpendicularly with regard to the first direction,
wherein the coil conductors are connected on the stator assembly to form a three-phase system having a first phase U, a second phase V and a third phase W,
wherein the coil conductors are configured as a first forward conductor and as a first return conductor of the first phase U connected in series with the first forward conductor, as a second forward conductor and as a second return conductor of the second phase V connected in series with the second forward conductor and as a third forward conductor and as a third return conductor of the third phase W connected in series with the third forward conductor,
wherein the first forward conductor and the first return conductor are electroconductively connected in series by a first horizontal connecting conductor arranged in the stator layer,
wherein the second forward conductor and the second return conductor are electroconductively connected in series by a second horizontal connecting conductor arranged in the stator layer,
wherein the three-phase system comprises a first side and a second side opposite to the first side which extend along the second direction, wherein the first horizontal connecting

Assignees

• Beckhoff Automation Gmbh

Inventors

• Brinkmann Rolf
• Prüssmeier Uwe
• Bentfeld Lukas

Classifications

• H02K41/031 Primary

  of the permanent magnet type · CPC title

• H01F27/28

  Coils; Windings; Conductive connections · CPC title

• H02K3/28

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H02K3/47

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

• H02P25/06

  Linear motors · CPC title