Back to results
US 11,056,948 B1Granted
Progressive force electro-permanent magnets actuator
AssigneeX Development LLC
InventorsMichael Jason Grundmann, Jonathan Ross
Life of this patent
Estimating the term…
Abstract
An example system includes a disk that is rotatable and has a plurality of ferromagnetic elements disposed in a radial array on a surface of the disk; and at least one electro-permanent magnet (EPM) mounted adjacent to the disk such that a gap separates the disk from the EPM. Applying an electric pulse to the at least one EPM changes a magnetic state thereof, thereby generating an external magnetic field that traverses the gap between the disk and the EPM and interacts with a ferromagnetic element of the plurality of ferromagnetic elements, and causing a rotational speed of the disk to change as the disk rotates.
Claims14
A braking system comprising:
- a first disk that is fixed and has one or more electro-permanent magnets (EPMs) disposed in a radial array on a surface of the first disk;
- and
- a second disk rotatably mounted adjacent to the first disk such that a gap separates the second disk from the first disk, wherein the second disk has a plurality of ferromagnetic elements disposed in respective radial array on a respective surface of the second disk,
- wherein the first disk and the second disk are juxtaposed on respective axially spaced planes such that the gap is an axial gap that separates the first disk from the second disk,
- wherein an axis of rotation of the second disk is offset from a respective axis of the first disk, and
- wherein applying an electric pulse to at least one EPM of the one or more EPMs changes a magnetic state of the EPM, thereby (i) generating an external magnetic field that traverses the gap between the first disk and the second disk and interacts with a ferromagnetic element of the plurality of ferromagnetic elements, and (ii) causing a rotational speed of the second disk to change as the second disk rotates.
3 more elements
A braking system comprising:
- a first disk;
- a second disk rotatably mounted adjacent to the first disk such that a gap separates the second disk from the first disk;
- a plurality of ferromagnetic elements disposed on respective surfaces of one or both of the first or second disks;
- and
- one or more electro-permanent magnets (EPMs) disposed on respective surfaces of one or both of the first or second disks and opposite at least one ferromagnetic element of the plurality of ferromagnetic elements,
- wherein the plurality of ferromagnetic elements are permanent magnets or EPMs,
- wherein the one or more EPMs disposed on respective surfaces of one or both of the first or second disks and opposite at least one ferromagnetic element of the plurality of ferromagnetic elements have a first polarity in a respective “ON” state, and wherein the ferromagnetic elements are EPMs having a second, different polarity in a respective “ON” state, and
- wherein applying an electric pulse to at least one EPM of the one or more EPMs changes a magnetic state of the EPM, thereby (i) generating an external magnetic field that traverses the gap between the first disk and the second disk and interacts with a ferromagnetic element of the plurality of ferromagnetic elements, and (ii) causing a rotational speed of the second disk to change as the second disk rotates.
5 more elements
A braking system comprising:
- a first disk that is fixed and has one or more first electro-permanent magnets (EPMs) disposed in a radial array on a surface of the first disk;
- and
- a second disk rotatably mounted adjacent to the first disk such that a gap separates the second disk from the first disk, wherein the second disk has a plurality of ferromagnetic elements disposed in respective radial array on a respective surface of the second disk,
- wherein the plurality of ferromagnetic elements of the second disk are permanent magnets or second EPMs, and
- wherein applying an electric pulse to at least one EPM of the one or more first EPMs changes a magnetic state of the first EPM, thereby (i) generating an external magnetic field that traverses the gap between the first disk and the second disk and interacts with a ferromagnetic element of the plurality of ferromagnetic elements, and (ii) causing a rotational speed of the second disk to change as the second disk rotates.
2 more elements
Dependencies are inferred from the claim text.