Hermetically sealed stator coil

Patent metadata

Field	Value
Publication number	US-11434858-B2
Application number	US-202016837304-A
Country	US
Kind code	B2
Filing date	Apr 1, 2020
Priority date	Apr 3, 2019
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

A stator coil assembly is provided comprising: a stator having a stator core;
a cover positioned within the stator core; a top section coupled to the cover to define an interior region, the top section including a pair of protrusions, each protrusion having a bore extending therethrough; a bobbin disposed within the interior region; a plurality of coil windings wrapped around the bobbin; a pair of lead wires, each lead wire extending through a corresponding protrusion bore and connecting to the coil windings within the interior region; and a pair of hermetic seals, each hermetic seal surrounding a corresponding lead wire within a protrusion bore to hermetically seal the interior region.

First claim

What is claimed is:

1. A stator coil assembly comprising:
a stator having a stator core;
a cover positioned within the stator core;
a top section coupled to the cover to define an interior region;
a bobbin disposed within the interior region, wherein the stator core surrounds a lower portion of the top section and the entirety of the bobbin and the cover;
a plurality of coil windings wrapped around the bobbin;
a pair of lead wires, each lead wire extending through a corresponding protrusion bore and connecting to the coil windings within the interior region; and
a pair of hermetic seals, each hermetic seal surrounding a corresponding lead wire within a bore defined within the top section to hermetically seal the interior region.

2. The stator coil assembly of claim 1 , wherein each of the pair of hermetic seals is formed from one of ceramic or glass.

3. The stator coil assembly of claim 1 , wherein the bobbin is formed from a plastic material.

4. The stator coil assembly of claim 1 , wherein the cover is formed from stainless steel.

5. The stator coil assembly of claim 1 , wherein the cover includes an inner wall, an outer wall and a bottom wall extending between the inner wall and the outer wall.

6. The stator coil assembly of claim 5 , wherein the top section is welded to a distal end of the inner wall of the cover and a distal end of the outer wall of the cover.

7. The stator coil assembly of claim 1 , further comprising an armature positioned below a lower surface of the stator core, wherein the armature moves upward when electrical current is passed through the coil windings.

8. The stator coil assembly of claim 1 , wherein the bobbin includes an upper wall, a lower wall and a central wall, the coil windings being wrapped around the central wall.

9. The stator coil assembly of claim 8 , wherein the upper wall of the bobbin includes a pair of hollow extensions, each hollow extension being configured to fit within a corresponding protrusion of the top section, the pair of lead wires extending through the pair of hollow extensions.

10. The stator coil assembly of claim 1 , wherein the top section includes a pair of protrusions.

11. The stator coil assembly of claim 10 , wherein the channel is a protrusion bore within each protrusion.

12. The stator coil assembly of claim 10 , further comprising a pair of grommets, each grommet surrounding a corresponding lead wire and a distal end of a corresponding protrusion of the top section.

Assignees

• Cummins Inc

Inventors

• Thomas Richard D

Classifications

• H01F2007/062

  Details of terminals or connectors for electromagnets · CPC title

• H01F7/128

  Encapsulating, encasing or sealing · CPC title

• F02M2200/9015

  Elastomeric or plastic materials · CPC title

• F02M51/066

  the armature and the valve being allowed to move relatively to each other or not being attached to each other · CPC title

• F02M63/0019

  characterised by the arrangement of electromagnets or fixed armatures · CPC title