Circular magnetic field generator and pump

Patent metadata

Field	Value
Publication number	US-11522122-B2
Application number	US-201916545632-A
Country	US
Kind code	B2
Filing date	Aug 20, 2019
Priority date	Aug 21, 2018
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A system may include a magnetic shape memory (MSM) element having a long axis that extends from a first end of the MSM element to a second end of the MSM element. The system may further include a first solenoid, where a longitudinal axis of the first solenoid is positioned at a first angle relative to the long axis of the MSM element. The system may also include a second solenoid, where a longitudinal axis of the second solenoid is positioned at a second angle relative to the long axis of the MSM element and at a third angle relative to the longitudinal axis of the first solenoid, where the longitudinal axis of the first solenoid and the longitudinal axis of the second solenoid are not parallel.

First claim

What is claimed is:

1. A system comprising:
a magnetic shape memory (MSM) element having a long axis that extends from a first end of the MSM element to a second end of the MSM element;
a first solenoid, wherein a longitudinal axis of the first solenoid is positioned at a first angle relative to the long axis of the MSM element; and
a second solenoid, wherein a longitudinal axis of the second solenoid is positioned at a second angle relative to the long axis of the MSM element and at a third angle relative to the longitudinal axis of the first solenoid, wherein the longitudinal axis of the first solenoid and the longitudinal axis of the second solenoid are not parallel.

2. The system of claim 1 , further comprising:
a pump housing having an inlet and an outlet, wherein the long axis of the MSM element extends from the inlet to the outlet.

3. The system of claim 1 , further comprising a controller configured to apply a first alternating current (AC) signal to the first solenoid and a second AC signal to the second solenoid, wherein the first AC signal and the second AC signal produce a combined rotating magnetic flux that causes a localized neck to form in the MSM element and to move from the first end to the second end.

4. The system of claim 3 , wherein the first AC signal and the second AC signal have a same amplitude and a same frequency, and wherein the first AC signal and the second AC signal have a substantially 90° phase difference.

5. The system of claim 1 , wherein the first angle is between 30° and 60°, wherein the second angle is between 30° and 60°, and wherein the third angle is between 60° and 120°.

6. The system of claim 1 , wherein the first angle is 45°, the second angle is 45°, and the third angle is 90°.

7. The system of claim 1 , wherein the longitudinal axis of the first solenoid and the longitudinal axis of the second solenoid intersect at a point proximate to the MSM element.

8. The system of claim 1 , further comprising:
one or more additional solenoids, wherein longitudinal axes of the additional solenoids are positioned at additional angles relative to the long axis of the MSM element.

9. The system of claim 8 , wherein the one or more additional solenoids includes two solenoids positioned symmetrically with the first solenoid and the second solenoid.

10. The system of claim 8 , wherein the one or more additional solenoids includes two solenoids positioned asymmetrically with the first solenoid and the second solenoid.

11. A system comprising:
a magnetic shape memory (MSM) element having a long axis that extends from a first end of the MSM element to a second end of the MSM element;
a first solenoid, wherein a longitudinal axis of the first solenoid is positioned at a first angle between 30° and 60° relative to the long axis of the MSM element; and
a second solenoid, wherein a longitudinal axis of the second solenoid is positioned at a second angle between 30° and 60° relative to the long axis of the MSM element and at a third angle between 60° and 120° relative to the longitudinal axis of the first solenoid, wherein the longitudinal axis of the first solenoid and the longitudinal axis of the second solenoid intersect at a point proximate to the MSM element.

12. The system of claim 11 , further comprising:
a pump housing having an inlet and an outlet, wherein the long axis of the MSM element extends from the inlet to the outlet.

13. The system of claim 11 , further comprising a controller configured to apply a first alternating current (AC) signal to the first solenoid and a second AC signal to the second solenoid, wherein the first AC signal and the second AC signal produce a combined rotating magnetic flux that, rotates around the point and causes a localized neck to form in the MSM element and to move from the first end of the MSM element to the second end of the MSM element.

14. The system of claim 13 , wherein the first AC signal and the second AC signal have a same amplitude and a same frequency, and wherein the first AC signal and the second AC signal have a substantially 90° phase difference.

15. The system of claim 11 , wherein the first angle is 45°, the second angle is 45°, and the third angle is 90°.

16. A method comprising:
applying a first alternating current (AC) signal to a first solenoid, wherein a longitudinal axis of the first solenoid is positioned at a first angle relative to a long axis of a magnetic shape memory (MSM) element; and
applying a second AC signal to a second solenoid, wherein a longitudinal axis of the second solenoid is positioned at a second angle relative to the long axis of the MSM element and at a third angle relative to the longitudinal axis of the first solenoid, wherein the longitudinal axis of the first solenoid and the longitudinal axis of the second solenoid intersect at a point proximate to the MSM element, and wherein the first AC signal and the second AC signal produce a combined rotating magnetic flux at the point.

17. The method of claim 16 , further comprising:
forming a neck in the MSM element in response to the combined rotating magnetic flux; and
moving the neck from a first end of the MSM element to a second end of the MSM element.

18. The method of claim 17 , wherein the long axis of the MSM element extends from an inlet of a pump housing to an outlet of the pump housing, the method further comprising:
moving the neck from the inlet to the outlet.

19. The method of claim 18 , further comprising:
moving a fluid from the inlet to the outlet using the neck.

20. The method of claim 16 , wherein the first AC signal and the second AC signal have a same amplitude and a same frequency, the method further comprising:
shifting the first AC signal or the second AC signal to produce a 90° phase difference between the first AC signal and the second AC signal.

21. The method of claim 16 , further comprising:
applying one or more additional AC signals to one or more additional solenoids.

Assignees

• Univ Boise State

Inventors

• Müllner Peter

Classifications

• F04B17/04

  using solenoids · CPC title

• F04B19/006

  Micropumps (F04B43/043 and F04B43/095 take precedence) · CPC title

• F02M21/0242 Primary

  Shut-off valves; Check valves; Safety valves; Pressure relief valves · CPC title

• Y02T10/30

  Use of alternative fuels, e.g. biofuels · CPC title

• F02M21/0251

  Details of actuators therefor · CPC title