System and method for tailoring magnetic forces

• US 9,711,268 B2
• Filed: 07/24/2015
• Issued: 07/18/2017
• Est. Priority Date: 09/22/2009
• Status: Active Grant

• Current Assignee: Correlated Magnetics Research, LLC
• Original Assignee: Correlated Magnetics Research, LLC
• Inventors: Machado, David P., Morgan, Jason N., Fullerton, Larry W., Roberts, Mark D.
• Primary Examiner(s): Barrera, Ramon M
• Application Number:
  US14/808,770
• Publication Number:
  US 20150364238A1
• Time in Patent Office: 725 Days
• CPC Class Codes: E05C 19/16 Devices holding the wing by magnetic or electromagnetic attraction E05C17/56 takes precedence
• CPC Class Codes: F16C 32/0476 with active support of one degree of freedom, e.g. axial magnetic bearings
• CPC Class Codes: H01F 7/021 Construction of PM H01F7/0278 takes precedence; PM compositions H01F1/032
• CPC Class Codes: H01F 7/0231 Magnetic circuits with PM for power or force generation
• CPC Class Codes: H01F 7/0242 Magnetic drives, magnetic coupling devices
• CPC Class Codes: H01F 7/0252 PM holding devices H01F7/021, H01F7/0215, H01F7/0226 take precedence
• CPC Class Codes: H01F 7/0263 Closures, bags, bands, engagement devices with male and female parts
• CPC Class Codes: H01F 7/20 without armatures cores H01F3/00; coils H01F5/00 ; shaping metal by applying magnetic forces B21D26/14; electromagnets specially adapted for NMR applications G01R33/381

Abstract

A magnetic system described herein includes first and second magnetic structures that simultaneously produce repel forces and attract forces that combine to produce a composite force that can be an attract force, a repel force, or a force that transitions from an attract force to a repel force.

Claims

1. A magnetic system comprising:

a first magnetizable material having a first portion having a first alternating polarity pattern and a second portion having a second alternating polarity pattern, wherein when said first magnetizable material is aligned with a second magnetizable material said first and second magnetizable material produce magnetic forces in accordance with a composite force curve comprising a first force curve having a first extinction rate and a second force curve having a second extinction rate greater than said first extinction rate.

2. A magnetic system comprising:

a first portion of a first magnetizable material having a first alternating polarity pattern having only two polarity regions; and

a second portion of said first magnetizable material having a second alternating polarity pattern having three or more polarity regions, wherein when said first magnetizable material is aligned with a second magnetizable material said first and second magnetizable materials produce magnetic forces in accordance with a composite force curve comprising a first force curve and a second force curve.

3. The magnetic system of claim 2, wherein said first magnetizable material is capable of being misaligned relative to said second magnetizable material.

4. The magnetic system of claim 3, wherein said first force curve is configured to align said first magnetizable material to said second magnetizable material.

5. A magnetic attachment system, comprising:

a magnetizable material having a first plurality of regions having a first polarity pattern and having a second plurality of regions having a second polarity pattern, wherein when said magnetizable material is aligned with another magnetizable material said magnetizable material and said another magnetizable material produce magnetic forces in accordance with a composite force curve, wherein said magnetizable material is moveable relative to said another magnetizable material in at least two dimensions for a first part of said composite first curve and said magnetizable material is moveable relative to said another magnetizable material in only one dimension for a second part of said composite first curve.

6. A magnetic system comprising:

a first portion of a first magnetizable material having a first polarity pattern; and

a second portion of said first magnetizable material having a second polarity pattern, wherein when said first magnetizable material is aligned with a second magnetizable material said first and second magnetizable materials produce magnetic forces in accordance with a repel force curve and a first attract force curve that combine to produce a composite force curve that is a second attract force curve, wherein said first attract force curve has a first peak attract force and said second attract force curve has a second peak attract force that is less than said first peak attract force.

7. A magnetic system comprising:

a first magnetizable material; and

a second magnetizable material, said first magnetizable material and said second magnetizable material producing a repel force curve and a first attract force curve that combine to produce a composite force curve that is a second attract force curve having a first attract force at a first separation distance and a second attract force at a second separation distance, and wherein said second separation distance is less than said first separation distance and said second attract force is less than said first attract force.

8. The magnetic system of claim 7, wherein when in a first portion of said composite force curve, said first magnetizable material is moveable relative to said second magnetizable material in at least two dimensions.

9. The magnetic system of claim 8, wherein when in a second portion of said composite force curve, said first magnetizable material is movable relative to said second magnetizable material in only one dimension.

10. A magnetic system comprising:

a first multi-pole magnet; and

a second multi-pole magnet, said first multi-pole magnet and said second multi-pole magnet being configured to produce a repel only force curve and a first attract only force curve that combine to produce a composite force curve that is a second attract only force curve having an inflection point.

11. A magnetic system comprising:

a first magnetizable material having a first alternating polarity pattern having a first code density; and

a second magnetizable material having a second alternating polarity pattern having a second code density greater than said first code density, said first magnetizable material and said second magnetizable material being magnetized to produce a composite force curve having an inflection point.

12. The magnetic system of claim 11, wherein said composite force curve is an attract force curve.

13. The magnetic system of claim 11, wherein said composite force curve is a repel force curve.

14. The magnetic system of claim 11, wherein said composite force curve further comprises a transition from a repel force curve to an attract force curve.

15. A multi-pole magnet, comprising:

a first polarity pattern; and

a second polarity pattern, wherein when said multi-pole magnet is aligned with another multi-pole magnet said multi-pole magnet and said another multi-pole magnet produce attract and repel magnetic forces in accordance with a composite force curve that is an attract only force curve.

16. A magnetic system comprising:

a first magnetizable material having a first polarity pattern;

a second magnetizable material having said first polarity pattern, said first magnetizable material and said second magnetizable material producing a first repel force curve and a first attract force curve that combine to produce a first composite force curve;

a third magnetizable material having a second polarity pattern; and

a fourth magnetizable material having said second polarity pattern, said third magnetizable material and said fourth magnetizable material producing a second repel force curve and a second attract force curve that combine to produce a second composite force curve, said first and second magnetizable materials being attached to a first object in a first line with a spacing between said first and second magnetizable materials, said third and fourth magnetizable materials being attached to a second object in a second line with a spacing between said third and fourth magnetizable materials;

wherein when said first object and said second object are aligned, said first composite force curve and said second composite force curve combine to produce a third composite force curve.

17. The magnetic system of claim 16, wherein said first polarity pattern of said first magnetizable material is in reversed order than said first polarity pattern of said second magnetizable material.

18. The magnetic system of claim 16, wherein said first magnetizable material and said second magnetizable material are disposed on a plane.

19. The magnetic system of claim 16, wherein each of said first and second repel force curves comprise a first extinction rate and each of said first and second attract force curves comprise a second extinction rate greater than said first extinction rate.

20. A magnetic system comprising:

a first magnetizable material having a first polarity pattern; and

a second magnetizable material having said first polarity pattern, said first magnetizable material and said second magnetizable material each producing a repel force curve and an attract force curve that combine to produce a composite force curve when aligned with a third magnetizable material and a fourth magnetizable material each having a second polarity pattern, said first and second magnetizable materials being attached to a first object in a first line with a first spacing between said first and second magnetizable materials, said third and fourth magnetizable materials being attached to a second object in a second line with a second spacing between said third and fourth magnetizable materials, said first spacing being substantially the same as said second spacing.

21. The magnetic system of claim 20, wherein said first polarity pattern of said first magnetizable material is in reversed order than said first polarity pattern of said second magnetizable material and said second polarity pattern of said third magnetizable material is in reversed order than said second polarity pattern of said fourth magnetizable material.

22. A magnetic system comprising:

a first magnetizable material comprising a first portion and a second portion, said first portion having a first polarity pattern having only two polarity regions, said second portion having a second polarity pattern having three or more regions; and

a second magnetizable material comprising a third portion and a fourth portion, said third portion having a third polarity pattern that is complementary to said first polarity pattern, said fourth portion having fourth polarity pattern that is anti-complementary to said second polarity pattern, said first magnetizable material and said second magnetizable material being configurable such that said first polarity pattern is aligned with said third polarity pattern and said second polarity pattern is aligned with said fourth polarity pattern, said first magnetizable material and said second magnetizable material being configurable such that said first polarity pattern is misaligned with said third polarity pattern and said second polarity pattern is misaligned with said fourth polarity pattern, said first portion and said third portion producing attract magnetic forces in accordance with a first attract force curve when said first polarity pattern is aligned with said third polarity pattern, said second portion and said fourth portion producing repel magnetic forces in accordance with a repel force curve when said second polarity pattern is aligned with said fourth polarity pattern, said first attract force curve having a first extinction rate, said repel force curve having a second extinction rate, said second extinction rate being greater than said first extinction rate;

wherein said repel force curve and said first attract curve produce a composite force curve that is a second attract force curve.

23. The magnetic system of claim 22, wherein said composite force curve includes an inflection point.

24. The magnetic system of claim 22, wherein said first magnetizable material is moveable relative to said second magnetizable material in at least two dimensions.

25. The magnetic system of claim 22, wherein said first magnetizable material is moveable relative to said second magnetizable material in at least two dimensions for a first portion of said composite first curve and said first magnetizable material is moveable relative to said second magnetizable material in only one dimension for a second portion of said composite first curve.

26. The magnetic system of claim 22, further comprising:

a third magnetizable material that is substantially the same as said first magnetizable material; and

a fourth magnetizable material that is substantially the same as said second magnetizable material, said first magnetizable material and said second magnetizable material being attached to a first object in a first line with a first spacing between said first magnetizable material and said second magnetizable materials, said third magnetizable material and said fourth magnetizable material being attached to a second object in a second line with a second spacing between said third and fourth magnetizable materials, said first spacing being substantially the same as said second spacing.

27. The magnetic system of claim 26, wherein said first magnetizable material, said second magnetizable material, said third magnetizable material, and said fourth magnetizable material are configured to be magnetically balanced across an interface boundary.