Electromagnetic cores, pumps using the same, and methods of manufacturing the same

Patent metadata

Field	Value
Publication number	US-2026011478-A1
Application number	US-202418765238-A
Country	US
Kind code	A1
Filing date	Jul 6, 2024
Priority date	Jul 6, 2024
Publication date	Jan 8, 2026
Grant date	—

Abstract

Systems and methods use bodies with multiple teeth that follow a magnetic field in the body. The teeth have adjacent gaps while the body remains a continuous rigid structure. The gaps may be any shape or size formed by removal from the parent body while preserving a continuous joining portion of the body. Cutting with electrical discharge wires or lasers may be used for the gaps. The body may take on any shape or size, including electromagnetic pump stator configurations. Recesses, including ledges, passages, toughs, bores, rounds, or flat faces may be formed with the gaps. Adjacent recesses between multiple bodies may form other functional passages, such as an angular or perimeter passage for driving coils in an electromagnetic pump. Insulators may be placed into the gaps. Example systems and methods require fewer additional joining or supporting structures due to the teeth already being connected from fabrication.

First claim

1 . A core useable in an electromagnetic device, the core comprising:
a plurality of teeth aligned with a magnetic field of the core, wherein each tooth is formed by two adjacent slots in the core; and a solid section joining all the teeth, wherein the solid section and the teeth are materially continuous.

2 . The core of claim 1 , wherein the core forms a curved shape about its axis, wherein the slots extend in a radial direction into the curved shape, and wherein the solid section is beyond the slots in the radial direction.

3 . The core of claim 2 , wherein the curved shape is annular, and wherein the slots extend a complete axial height of the core and at least 80% of the core in the radial direction.

4 . The core of claim 3 , further comprising:
an axial recess extending entirely through the core in an angular direction with a radial passage through the solid section.

5 . The core of claim 4 , wherein the recess does not extend entirely through the core in the radial direction.

6 . The core of claim 1 , further comprising:
insulation fully filling all the slots between the teeth.

7 . The core of claim 1 , wherein the teeth and solid section are all completely a solid magnetic material.

8 . The core of claim 7 , wherein the entire core is a single piece of a ferromagnetic material.

9 . The core of claim 1 , wherein the slots are formed by machining, and wherein the slots are less than 0.01-inch thick and extend an entire axial height of the core.

10 . An electromotive device comprising:
a plurality of the cores of claim 1 aligned to form a flow passage around the cores.

11 . The device of claim 10 , wherein the device is an electromagnetic pump.

12 . The device of claim 10 , wherein the plurality of cores are further aligned to align all teeth between the cores in at least one of an axial direction and a radial direction.

13 . The device of claim 10 , wherein the plurality of cores are aligned in a vertical stack, and where each core includes at least one recess in the axial direction, and wherein two of the recesses of directly adjacent cores align to form a coil passage through the vertical stack.

14 . The device of claim 13 , wherein the at least one recess further includes a passage through the solid section to form an external entry into the coil passage.

15 . A method of manufacturing a core for an electromagnetic device, the method comprising:
cutting a plurality of slots into the core so as to form a plurality of teeth aligned with a magnetic field of the core, wherein each tooth is formed by two adjacent slots in the core, and wherein the cutting is to a partial width of the core so as to retain a solid section joining all the teeth of the core.

16 . The method of claim 15 , wherein the cutting is performed by at least one of electrical discharge machining, water jetting, and laser cutting.

17 . The method of claim 16 , wherein the cutting is performed to each of the slots is 0.01-inches or less in thickness and an entire axial height of the core.

18 . The method of claim 15 , wherein the cutting is performed on a core that is a single piece of continuous ferromagnetic material.

19 . The method of claim 15 , further comprising:
removing a recess in the core across a length and to a height of the core both perpendicular to the width, wherein the removing is performed before the cutting, and wherein the recess further extends in the length direction through the solid section and less than all of the solid section.

20 . The method of claim 15 , further comprising:
applying an insulator in the slots so as to form solid insulation between the teeth.

Assignees

• Ge Hitachi Nuclear Energy Americas Llc

Inventors

• Wagner Scott A
• Davis Nikolas

Classifications

• H01F41/0206

  Manufacturing of magnetic cores by mechanical means (magnetic cores per se H01F27/24) · CPC title

• H01F27/24 Primary

  Magnetic cores · CPC title