Electromagnetic actuator

• US 10,641,008 B2
• Filed: 02/04/2019
• Issued: 05/05/2020
• Est. Priority Date: 02/21/2018
• Status: Active Grant

• Current Assignee: iLOQ Oy
• Original Assignee: Axtuator Oy
• Inventors: Pukari, Mika
• Primary Examiner(s): Nguyen, Danny
• Application Number:
  US16/267,090
• Publication Number:
  US 20190257118A1
• Time in Patent Office: 456 Days
• Field of Search: 361139, 361144, 361160, 361172
• CPC Class Codes: E05B 47/0004 said core being linearly movable
• CPC Class Codes: E05B 47/0005 said core being rotary movable
• CPC Class Codes: E05B 47/0038 using permanent magnets
• CPC Class Codes: E05B 47/063 with a rectilinearly moveable blocking element
• CPC Class Codes: G07C 2009/00634 Power supply for the lock
• CPC Class Codes: G07C 2009/00793 by Hertzian waves
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks
• CPC Class Codes: G07C 9/00563 using personal physical data of the operator, e.g. finger prints, retinal images, voicepatterns
• CPC Class Codes: G07C 9/00698 actuated in function of displayed informations
• CPC Class Codes: G07C 9/00722 with magnetic components, e.g. magnets, magnetic strips, metallic inserts mechanical locks operated by permanent magnets E05B47/0038
• CPC Class Codes: G07C 9/00817 where the code of the lock can be programmed
• CPC Class Codes: G07C 9/00896 specially adapted for particular uses
• CPC Class Codes: H01F 7/18 Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
• CPC Class Codes: Y10T 70/7057 Permanent magnet

Abstract

The invention provides a magnetic actuator including at least two magnets. One magnet is a semi hard magnet and the other magnet is a hard magnet. The hard magnet is configured to open or close the magnetic actuator. The semi hard magnet and the hard magnet are placed adjacent to each other. A change in magnetization polarization of the semi hard magnet is configured to push or pull the hard magnet to open or close a digital lock realised with the magnetic actuator. The magnetic actuator of the invention can also be used to realise a valve.

Claims

1. A magnetic actuator comprising a semi-hard magnet and a hard magnet, wherein the hard magnet is configured to induce mechanical movement by the magnetic actuator, wherein the magnetic actuator comprises a body, the body comprising a first axle, a second axle and a user interface connected to the first axle, and wherein the semi-hard magnet and the hard magnet are inside the first axle.

2. A magnetic actuator comprising a semi-hard magnet and a hard magnet, wherein the hard magnet is configured to induce mechanical movement by the magnetic actuator, and wherein, in a close position of the magnetic actuator, the hard magnet is configured to be inside a first axle, a second axle does not rotate, and a user interface rotates.

3. A magnetic actuator comprising a semi-hard magnet and a hard magnet, wherein the hard magnet is configured to induce mechanical movement by the magnetic actuator, and wherein the magnetic actuator comprises at least one blocking pin that is configured to protrude into a notch of an actuator body, to prevent unauthorized actuation of the magnetic actuator, in the event of any of the following:

an external magnetic field is applied, an external hit or impulse is applied, or a first axle is turned too fast.

4. The magnetic actuator as claimed in claim 3, wherein the blocking pins may protrude into the actuator body from different angles.

5. A software program product configured to control operation of a magnetic actuator comprising a semi-hard magnet and a hard magnet, the software program product comprising a processing module configured to operate the magnetic actuator, the processing module comprising:

an input module configured to receive an input from a user interface;

an authentication module configured to authenticate the input received by the user interface;

a database to store identification information of one or more users; and

an output module configured to control a power source to power a magnetization coil to change magnetization polarization of the semi hard magnet in response to successful identification of a user, and configured to control the hard magnet to induce mechanical movement therein.

6. The software program product as claimed in claim 5, wherein the semi-hard magnet is inside the magnetization coil, and wherein the magnetization coil is controlled by the output module for magnetization of the semi-hard magnet, which has a coercivity less than a coercivity of the hard magnet.

7. The software program product as claimed in claim 5, wherein the semi-hard magnet and the hard magnet are configured adjacent to each other, and wherein the output module is configured to change the magnetization polarization of the semi-hard magnet to induce mechanical movement in the hard magnet to move the magnetic actuator between an open position or a close position.

8. The software program product as claimed in claim 5, wherein rest state of the magnetic actuator is closed, and wherein the output module configures the magnetic actuator to return to a close position.

9. The software program product as claimed in claim 5, wherein rest state of the magnetic actuator is open, and wherein the output module configures the magnetic actuator to return to an open position.

10. The software program product as claimed in claim 5, wherein the magnetic actuator is a self-powered actuator powered by any of the following:

Near Field Communication (NFC), solar panel, user'"'"'s muscle power, power supply or battery.

11. The software program product as claimed in claim 5, wherein a magnetic actuator body comprises a first axle, a second axle and a user interface connected to the first axle, and wherein the semi-hard magnet and the hard magnet are inside the first axle.

12. The software program product as claimed in claim 5, wherein the magnetic actuator comprises a position sensor, configured to position a notch of a second axle in place for the hard magnet to enter the notch.

13. The software program product as claimed in claim 5, wherein the magnetic actuator comprises electronics is connected to an identification device via a communication bus, and wherein the identification device is configured to identify a user by any of the following:

electronic key, electronic key tag, fingerprint, magnetic stripe, NFC phone, or a 3D camera or scanner configured to authenticate the user by scanning or capturing the user'"'"'s face.

14. The software program product as claimed in claim 5, wherein in a close position, the hard magnet is configured to be inside a first axle, a second axle does not rotate, and a user interface rotates.

15. The software program product as claimed in claim 5, wherein in an open position, the hard magnet is protruded into a notch of a second axle.

17. The software program product as claimed in claim 5 configured to control a magnetic actuator for a flow control valve wherein the hard magnet is attached to a plunger that is configured to move between a close position or an open position within the flow control valve to restrict or allow flow of fluid through a conduit, wherein the hard magnet is configured to be repelled by the semi-hard magnet by changing magnetization polarization of the semi-hard magnet to move the plunger to the open position, and wherein the hard magnet is configured to be attracted to the semi-hard magnet by changing the magnetization polarization of the semi-hard magnet to move the plunger to the close position or vice versa.

18. The software program product as claimed in claim 6, wherein the semi-hard magnet has coercivity at least 5 times less than the coercivity of the hard magnet.

16. A magnetic actuator for a flow control valve comprising a semi-hard magnet and a hard magnet, wherein and the hard magnet is configured to induce mechanical movement by the magnetic actuator, wherein the hard magnet is attached to a plunger that is configured to move between a close position or an open position within the flow control valve to restrict or allow flow of fluid through a conduit, wherein the hard magnet is configured to be repelled by the semi-hard magnet by changing magnetization polarization of the semi-hard magnet to move the plunger to the open position, and wherein the hard magnet is attracted to the semi-hard magnet by changing the magnetization polarization of the semi-hard magnet to move the plunger to the close position or vice versa.