System and method for tailoring magnetic forces

• US 9,412,506 B2
• Filed: 10/13/2015
• Issued: 08/09/2016
• Est. Priority Date: 09/22/2009
• Status: Active Grant

• Current Assignee: Correlated Magnetics Research, LLC
• Original Assignee: Correlated Magnetics Research, LLC
• Inventors: Roberts, Mark D., Machado, David P., Morgan, Jason N., Fullerton, Larry W.
• Primary Examiner(s): Barrera, Ramon M
• Application Number:
  US14/882,190
• Publication Number:
  US 20160180997A1
• Time in Patent Office: 301 Days
• Field of Search: 335/306
• US Class Current: 1/1
• 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 multi-pole magnet comprising a first plurality of polarity regions having a first polarity pattern;

a second multi-pole magnet comprising a second plurality of polarity regions having a second polarity pattern;

a third multi-pole magnet comprising a third plurality of polarity regions having a third polarity pattern; and

a fourth multi-pole magnet comprising a fourth plurality of polarity regions having a fourth polarity pattern;

wherein when said first polarity pattern is aligned with said second polarity pattern, said first multi-pole magnet and second multi-pole magnet produce a first composite force curve, said first composite force curve comprising a first force curve with a first extinction rate and a second force curve with a second extinction rate, wherein said first composite force curve is an attract force curve and said first force curve is an attract force curve and said second force curve is a repel force curve and said first extinction rate is greater than said second extinction rate, wherein the first magnetizable material is moveable relative to said second magnetizable material in at least two dimensions for a first portion of said first composite force curve, wherein said first multi-pole magnet is moveable relative to said second multi-pole magnet in only one dimension for a second portion of said first composite force curve, wherein said first multi-pole magnet and said second multi-pole magnet have a direction of magnetization, and wherein said first multi-pole magnet is moveable to said second multi-pole magnet substantially parallel to the direction of magnetization, wherein when said third polarity pattern is aligned with said fourth polarity pattern, said third multi-pole magnet and said fourth multi-pole magnet produce a third magnetic force curve and a fourth magnetic force curve, said third and fourth magnetic force curves combining to produce a second composite force curve, wherein said first and third multi-pole magnets are attached to a first object in a first straight line with a spacing between said first and third multi-pole magnets, and wherein said second and fourth multi-pole magnets are attached to a second object in a second straight line with a spacing between said second and fourth multi-pole magnets, and wherein when said first object and said second object are aligned such that said first straight line is substantially parallel to said second straight line, said first composite force curve and said second composite force curve combining to produce a third composite force curve.

2. The system of claim 1, wherein said third composite force curve further comprises a composite attract force curve having a third extinction rate and a composite repel force curve having a fourth extinction rate, said third extinction rate being greater than said fourth extinction rate.

3. The system of claim 1, wherein said third multi-pole magnet comprises a third polarity pattern, wherein said third polarity pattern corresponds to the first polarity pattern rotated 180 degrees.

4. 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 magnetizable material and said second magnetizable material 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 second attract force curve comprises an inflection point, 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, wherein said first magnetizable material is moveable relative to said second magnetizable material in at least two dimensions when in a first portion of said composite force curve.

5. The magnetic system of claim 4, wherein said inflection point comprises a transition from an increasing attract force to a decreasing attract force.

6. The magnetic system of claim 4, wherein said first magnetizable material is movable relative to said second magnetizable material in only one dimension when in a second portion of said composite force curve.

7. The magnetic system of claim 6, further comprising a third magnetizable material and a fourth magnetizable material, wherein said first and third magnetizable materials are disposed in a first straight line, and wherein said second and fourth magnetizable materials are disposed in a second straight line.

8. The magnetic system of claim 7, wherein said first and second magnetizable materials are separated by a first separation distance and said third and fourth magnetizable materials are separated by a second separation distance, and wherein said first and separation distances are substantially the same.

9. The system of claim 7, wherein said third magnetizable material comprises a third polarity pattern, and wherein said third polarity pattern corresponds to the first polarity pattern rotated 180 degrees.

10. A magnetic system comprising:

a first magnetizable material having a first polarity pattern and a second polarity pattern;

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

11. The magnetic system of claim 10, wherein said first magnetizable material comprises an asymmetric polarity pattern.

12. The magnetic system of claim 11, wherein said second magnetizable material comprises an asymmetric polarity pattern.

13. The magnetic system of claim 10, wherein said first magnetizable material comprises an unbalanced polarity pattern.

14. The magnetic system of claim 13, wherein said second magnetizable material comprises an asymmetric polarity pattern.

15. The system of claim 10, wherein said first and second polarity patterns of said third magnetizable material are rotated 180 degrees relative to said first and second polarity patterns of said first magnetizable material.

16. A magnetic system comprising:

a first magnetizable material comprising a first portion having a first polarity pattern and a second portion having a second polarity pattern;

and a third magnetizable material having said first polarity pattern and said second polarity pattern, said first magnetizable material and said third 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 second magnetizable material and a fourth magnetizable material, said first and third magnetizable materials being attached to a first object in a first straight line with a first spacing between said first and third magnetizable materials, said second and fourth magnetizable materials being attached to a second object in a second straight line with a second spacing between said second and fourth magnetizable materials, said first spacing being substantially the same as said second spacing, said first and second polarity patterns of said third magnetizable material being rotated 180 degrees relative to said first and second polarity patterns of said first magnetizable material, and wherein each of said first and second magnetizable materials comprise asymmetric polarity patterns, and wherein each of said first and second magnetizable materials comprise unbalanced polarity patterns, and wherein said first object and said second object are moveable in at least two dimensions when in a first portion of said composite force curve and wherein said first object and said second object are moveable in only one dimension when in a second portion of said composite force curve, and wherein said attract force curve comprises a first peak attract force and wherein said composite force curve comprises a second peak attract force, and wherein said first peak attract force is greater than said second peak attract force.