Magnetic actuator for a magnetic suspension system
AssigneeSpindrive Oy
InventorNikita Uzhegov
Life of this patent
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Abstract
A magnetic actuator for a magnetic suspension system includes a core section having an annular yoke and radially directed teeth joining the yoke. The magnetic actuator includes coils surrounding the teeth and a mechanical structure having a first section and a second section. The first section is attached to the yoke and conducts magnetic flux axially. The second section joins the first section and conducts the magnetic flux radially in a direction opposite to a direction of the magnetic flux in the teeth. The magnetic actuator includes a mechanical safety bearing that is between the second section and the teeth. Thus, the safety bearing is in a room surrounded by a magnetic flux circulation path. Therefore, the safety bearing does not increase an axial length of the magnetic suspension system.
Claims20
A magnetic actuator comprising:
- a core section having an annular yoke and radially directed teeth joining the annular yoke,
- coils having radially directed magnetic axes and surrounding the radially directed teeth, and
- a mechanical structure having a first section attached to the annular yoke and extending axially from the annular yoke and a second section joining the first section and extending radially from the first section in a same direction in which the radially directed teeth extend radially from the annular yoke,
- wherein the first section is suitable for conducting magnetic flux axially and the second section is suitable for conducting the magnetic flux radially in a direction opposite to a direction of the magnetic flux in the radially directed teeth, and wherein the magnetic actuator comprises a mechanical safety bearing that is, in an axial direction of the magnetic actuator, between the second section of the mechanical structure and the radially directed teeth of the core section.
A magnetic suspension system comprising:
- at least one magnetic actuator for magnetically levitating an object,
- equipment for generating a position signal indicative of a position of the object with respect to a reference position of the object, and
- a controller for controlling electric currents of the coils of the magnetic actuator based on the position signal,
- wherein the at least one magnetic actuator comprises:
- a core section having an annular yoke and radially directed teeth joining the annular yoke,
- coils having radially directed magnetic axes and surrounding the radially directed teeth, and
- a mechanical structure having a first section attached to the annular yoke and extending axially from the annular yoke and a second section joining the first section and extending radially from the first section in a same direction in which the radially directed teeth extend radially from the annular yoke,
- wherein the first section is suitable for conducting magnetic flux axially and the second section is suitable for conducting the magnetic flux radially in a direction opposite to a direction of the magnetic flux in the radially directed teeth, and wherein the magnetic actuator comprises a mechanical safety bearing that is, in an axial direction of the magnetic actuator, between the second section of the mechanical structure and the radially directed teeth of the core section.
Dependencies are inferred from the claim text.