System and method for producing magnetic structures

• US 9,082,539 B2
• Filed: 07/14/2014
• Issued: 07/14/2015
• Est. Priority Date: 04/04/2008
• Status: Expired due to Fees

• Current Assignee: Correlated Magnetics Research, LLC
• Original Assignee: Correlated Magnetics Research, LLC
• Inventors: Fullerton, Larry W.
• Primary Examiner(s): BARRERA, RAMON M
• Application Number:
  US14/330,354
• Publication Number:
  US 20150022298A1
• Time in Patent Office: 365 Days
• Field of Search: 335/284, 361143-156
• US Class Current: 1/1
• CPC Class Codes: G01D 18/00 Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
• CPC Class Codes: H01F 1/01 of inorganic materials H01F1/44 takes precedence
• CPC Class Codes: H01F 13/003 Methods and devices for magnetising permanent magnets permanent magnets H01F7/02
• CPC Class Codes: H01F 7/02 Permanent magnets [PM]
• CPC Class Codes: H01F 7/021 Construction of PM H01F7/0278 takes precedence; PM compositions H01F1/032
• CPC Class Codes: H01F 7/0242 Magnetic drives, magnetic coupling devices
• CPC Class Codes: H01F 7/0247 Orientating, locating, transporting arrangements
• CPC Class Codes: H01F 7/0252 PM holding devices H01F7/021, H01F7/0215, H01F7/0226 take precedence
• CPC Class Codes: H01F 7/0284 using a trimmable or adjustable magnetic circuit, e.g. for a symmetric dipole or quadrupole magnetic field
• CPC Class Codes: H02K 15/03 having permanent magnets
• CPC Class Codes: H02K 49/10 of the permanent-magnet type
• CPC Class Codes: Y10T 24/32 having magnetic fastener

Abstract

An improved system and method for producing magnetic structures involves a first magnetizing circuit having a first inductor coil used to magnetically print a first magnetic source onto a magnetizable material and a second magnetizing circuit having a second inductor coil used to magnetically print a second magnetic source onto said magnetizable material.

Claims

1. A system for producing magnetic structures, comprising:

a first magnetizing circuit having a first inductor coil configured to magnetically print a first magnetic source onto a magnetizable material, said first inductor coil having a first plurality of electrically conductive layers of a first flat electrical conductor having a first plurality of turns about a first hole,

wherein said first flat electrical conductor has a first conductor width extending from an outer perimeter of said first hole to an outer perimeter of said first inductor coil,

and wherein said first flat electrical conductor has a first conductor thickness,

and wherein said first conductor width is greater than or equal to twice said first conductor thickness; and

a second magnetizing circuit having a second inductor coil configured to magnetically print a second magnetic source onto said magnetizable material, said second inductor coil having a second plurality of electrically conductive layers of a second flat electrical conductor having a second plurality of turns about a second hole,

wherein said second flat electrical conductor has a second conductor width extending from an outer perimeter of said second hole to an outer perimeter of said second inductor coil,

and wherein said second flat electrical conductor has a second conductor thickness,

and wherein said second conductor width is greater than or equal to twice said second conductor thickness.

2. The system of claim 1, wherein said first inductor coil is configured to print a magnetic source having a first polarity and said second inductor coil is configured to print a magnetic source having a second polarity that is opposite said first polarity.

3. The system of claim 1, further comprising:

a magnetic shielding layer.

4. The system of claim 1, further comprising:

a heat sink.

5. The system of claim 1, further comprising:

a magnetic field measurement device.

6. The system of claim 1, wherein said first magnetizing circuit having said first inductor coil is configured to prints a plurality of magnetic sources onto said magnetizable material.

7. The system of claim 1, wherein said second magnetizing circuit having said second inductor coil is configured to prints a plurality of magnetic sources onto said magnetizable material.

8. The system of claim 1, further comprising:

a control system for controlling the printing by said first inductor coil relative to a movement of said magnetizable material.

9. The system of claim 1, further comprising:

a control system for controlling the printing by said second inductor coil relative to a movement of said magnetizable material.

10. The system of claim 1, wherein said first inductor coil configured to produce a magnetizing field having a high magnetic flux density and a low magnetic flux density when a current is applied to said first inductor coil, and wherein said first magnetic source has an area on a first surface of said magnetizable material and has a depth within said magnetizable material that is less than or equal to a thickness of said magnetizable material between said first surface and a second surface opposite said first surface, and wherein a first portion of said magnetizable material that is inside said area is subjected to said high magnetic flux density and at least a second portion of said magnetizable material that is outside said area is subjected to said low magnetic flux density, and wherein the high magnetic flux density is sufficient to create saturated magnetization in said magnetizable material and said low magnetic flux density is insufficient to create saturated magnetization in said magnetizable material.

11. A method for producing magnetic structures, comprising:

magnetically printing a first magnetic source onto a magnetizable material using a first magnetizing circuit having a first inductor coil, said first inductor coil having a first plurality of electrically conductive layers of a first flat electrical conductor having a first plurality of turns about a first hole,

wherein said first flat electrical conductor has a first conductor width extending from an outer perimeter of said first hole to an outer perimeter of said first inductor coil,

and wherein said first flat electrical conductor has a first conductor thickness,

and wherein said first conductor width is greater than or equal to twice said first conductor thickness; and

magnetically printing a second magnetic source onto said magnetizable material using a second magnetizing circuit having a second inductor coil, said second inductor coil having a second plurality of electrically conductive la ers of a second flat electrical conductor having a second plurality of turns about a second hole,

wherein said second flat electrical conductor has a second conductor width extending from an outer perimeter of said second hole to an outer perimeter of said second inductor coil,

and wherein said second flat electrical conductor has a second conductor thickness,

and wherein said second conductor width is greater than or equal to twice said second conductor thickness.

12. The method claim 11, wherein said first magnetic source has a first polarity and said second magnetic source has a second polarity that is opposite said first polarity.

13. The method of claim 11, further comprising:

providing a magnetic shielding layer.

14. The method of claim 11, further comprising:

providing a heat sink.

15. The method of claim 11, further comprising:

providing a magnetic field measurement device.

16. The method of claim 11, wherein said first inductor coil prints a plurality of magnetic sources onto said magnetizable material.

17. The method of claim 11, wherein said second inductor coil prints a plurality of magnetic sources onto said magnetizable material.

18. The method of claim 11, further comprising:

controlling the printing by said first inductor coil relative to a movement of said magnetizable material.

19. The method of claim 11, further comprising:

controlling the printing by said second inductor coil relative to a movement of said magnetizable material.

20. The method of claim 11, wherein said first inductor coil generates a magnetizing field having a high magnetic flux density and a low magnetic flux density when a current is applied to said first inductor coil, and wherein said first magnetic source has an area on a first surface of said magnetizable material and has a depth within said magnetizable material that is less than or equal to a thickness of said magnetizable material between said first surface and a second surface opposite said first surface, and wherein a first portion of said magnetizable material that is inside said area is subjected to said high magnetic flux density and at least a second portion of said magnetizable material that is outside said area is subjected to said low magnetic flux density, and wherein the high magnetic flux density is sufficient to create saturated magnetization in said magnetizable material and said low magnetic flux density is insufficient to create saturated magnetization in said magnetizable material.