Winding method for radial magnetic bearing stator, a radial magnetic bearing stator and a radial magnetic bearing

Patent metadata

Field	Value
Publication number	US-12297865-B2
Application number	US-202217747578-A
Country	US
Kind code	B2
Filing date	May 18, 2022
Priority date	May 21, 2021
Publication date	May 13, 2025
Grant date	May 13, 2025

Abstract

A winding method for radial magnetic bearing stator, a radial magnetic bearing stator and a radial magnetic bearing. The winding method for radial magnetic bearing stator includes: S 110 , sleeving a first formed stator winding on a first stator tooth of a stator core along a radial outward direction; S 120 , sleeving a second formed stator winding on a second stator tooth of the stator core along a radial outward direction; S 130 , a first coil of the first formed stator winding is connected in series with a second coil of the second formed stator winding; the first stator tooth is adjacent to the second stator tooth, and a stator slot is formed therebetween; and the coil number of the first formed stator winding is larger than that of the second formed stator winding.

First claim

What is claimed is:

1. A winding method for radial magnetic bearing stator, comprising:
S 110 , sleeving a first formed stator winding on a first stator tooth of a stator core along a radial outward direction;
S 120 , sleeving a second formed stator winding on a second stator tooth of the stator core along a radial outward direction;
S 130 , a first coil of the first formed stator winding is connected in series with a second coil of the second formed stator winding;
wherein the first stator tooth is adjacent to the second stator tooth, and a stator slot is formed therebetween and the coil number of the first coil of the first formed stator winding is larger than that of the second coil of the second formed stator winding;
wherein before step S 110 , further comprising: S 100 , winding the first coil on a first wound bobbin to form the first formed stator winding, and winding the second coil on a second wound bobbin to form the second formed stator winding;
wherein in step S 100 , the first coil is wound with respect to the first wound bobbin to have a varying thickness; wherein the first coil having a cylindrical section having uniform thickness and the varying thickness forms a tapered angle between the cylindrical section to a flat section at a wall of the first wound bobbin at the radial inner end of the first wound bobbin, wherein the flat section is substantially perpendicular to the cylindrical section, and a maximum thickness of the second coil of the second formed stator winding that can be sleeved on the second stator tooth is limited between the tapered angle and the second stator tooth.

2. The winding method according to claim 1 ,
wherein the radial magnetic bearing stator is an eight-pole stator, one of the first formed stator windings corresponds to one of the second formed stator windings, and one of the first stator teeth corresponds to one of the second stator teeth adjacent to one side of the first stator tooth.

3. The winding method according to claim 1 , wherein the tapered angle formed by the first coil is parallel to an included angle of an opening of the stator slot.

4. A radial magnetic bearing stator, comprising:
a stator core having a stator yoke and adjacent first and second stator teeth disposed along the stator yoke, with a stator slot formed therebetween;
a first formed stator winding sleeved on the first stator tooth of the stator core along a radial outward direction; and
a second formed stator winding sleeved on the second stator tooth of the stator core along the radial outward direction;
wherein, a first coil of the first formed stator winding is connected in series with a second coil of the second formed stator winding; and the coil number of the first coil of the first formed stator winding is larger than that of the second coil of the second formed stator winding;
wherein the first coil has a varying thickness;
wherein the first coil has a cylindrical section having uniform thickness and the varying thickness forms a tapered angle between the cylindrical section to a flat section at a wall of the first coil at the radial inner end of the first coil, wherein the flat section is substantially perpendicular to the cylindrical section, and a maximum thickness of the second coil of the second formed stator winding that can be sleeved on the second stator tooth is limited between the tapered angle and the second stator tooth.

5. The radial magnetic bearing stator according to claim 4 ,
wherein the radial magnetic bearing stator is an eight-pole stator, one of the first formed stator windings corresponds to one of the second formed stator windings, and one of the first stator teeth corresponds to one of the second stator teeth adjacent to one side of the first stator tooth.

6. The radial magnetic bearing stator according to claim 4 , wherein,
the first formed stator winding comprises:
a first wound bobbin having a first main body and first end stop walls disposed at both ends of the first main body;
wherein the first coil is wound on the first wound bobbin and is limited by the first end stop walls in the radial direction; and/or
the second formed stator winding comprises:
a second wound bobbin having a second main body and second end stop walls disposed at both ends of the second main body;
wherein the second coil is wound on the second wound bobbin and is limited by the second end stop walls in the radial direction.

7. The radial magnetic bearing stator according to claim 6 , wherein a maximum thickness of the first coil wound on the first wound bobbin is approximately a width of an opening of the stator slot in a direction perpendicular to a slot wall of the stator slot.

8. The radial magnetic bearing stator according to claim 4 , wherein the tapered angle formed by the first coil is parallel to an included angle of the opening of the stator slot.

9. A radial magnetic bearing, comprising: the radial magnetic bearing stator according to claim 4 .

Assignees

• Carrier Corp

Inventors

• Li Jiedong
• Cao Chong
• Cao Jun
• Deng Kai

Classifications

• H02K3/48

  in slots · 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

• H01F41/098

  Mandrels; Formers · CPC title

• H02K2203/12

  Machines characterised by the bobbins for supporting the windings · CPC title

• H02K1/146

  consisting of a generally annular yoke with salient poles · CPC title