LINEAR MOTOR WITH ARMATURE COOLING CHANNELS

• US 20190109501A1
• Filed: 10/09/2018
• Published: 04/11/2019
• Est. Priority Date: 10/10/2017
• Status: Active Grant

• Current Assignee: MTS Systems Corporation (Illinois Tool Works Inc.)
• Original Assignee: MTS Systems Corporation (Illinois Tool Works Inc.)
• Inventors: Haeg, Steven Robert, Pokhil, Dmitrii Tarasovich, Groepper, Charles
• Granted Patent: US 10,992,193 B2
• Time in Patent Office: Days
• CPC Class Codes: F16C 29/005 Guide rails or tracks for a linear bearing, i.e. adapted for movement of a carriage or bearing body there along
• CPC Class Codes: H02K 1/20 with channels or ducts for flow of cooling medium
• CPC Class Codes: H02K 41/031 of the permanent magnet type
• CPC Class Codes: H02K 9/19 for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Abstract

An electric linear motor includes a support structure, a stator assembly secured to the support structure, and an armature assembly secured to the support structure for guided movement relative to the stator assembly. The armature assembly includes a plurality of magnetic devices and a core support supporting each of the magnetic devices in spaced apart relation to the stator assembly. The core support has a plurality of fluid cooling passageways formed therein.

Claims

1. An electric linear motor comprising:

a support structure;

a stator assembly secured to the support structure; and

an armature assembly secured to the support structure for guided movement relative to the stator assembly, the armature assembly including;

a plurality of magnetic devices; and

a core support supporting each of the magnetic devices in spaced apart relation to the stator assembly, the core support having a plurality of fluid cooling passageways formed therein.

2. The electric linear motor of claim 1 wherein a fluid cooling passageway is arranged proximate each magnetic device.

3. The electric linear motor of claim 2 wherein each fluid cooling passageway is disposed in the core support at a location of lower magnetic flux density.

4. The electric linear motor of claim 3 wherein each fluid cooling passageway is disposed along a plane bisecting each magnet.

5. The electric linear motor of claim 4 wherein each of the fluid cooling passageways is oriented orthogonal to linear motion of the armature assembly.

6. The electric linear motor of claim 5 wherein each fluid cooling passageway extends from a first edge of the core support to a second edge of the core support on a side opposite the first edge.

7. The electric linear motor of claim 6 and further comprising coupling passageways, each coupling passageway fluidly coupling in a successive manner adjacent fluid cooling passageways in the core support.

8. The electric linear motor of claim 7 wherein at least a portion a wall of each coupling passageway is formed from material of the core support.

9. The electric linear motor of claim 8 and further comprising a first guide member secured to the first edge and a second guide member secured to the second edge, each guide guiding the armature assembly for linear movement relative to the core support.

10. The electric linear motor of claim 9 wherein portions of each of the guides forms at least a portion of the wall of each coupling passageway.

11. The electric linear motor of claim 1 and further comprising a fluid source fluidly coupled to the fluid cooling passageways.

12. The electric linear motor of claim 11 wherein the fluid source comprises a pump.

13. The electric linear motor of claim 12 wherein a fluid flowing through the cooling passageways comprises a liquid.