Electromagnetic rotary drive

Patent metadata

Field	Value
Publication number	US-12506371-B2
Application number	US-202318389587-A
Country	US
Kind code	B2
Filing date	Nov 14, 2023
Priority date	Dec 12, 2022
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

An electromagnetic rotary drive includes a single-use device for single use and a reusable device for multiple use. The single-use device includes a rotor housing with a rotor, a connecting tube for a fluid, and a single-use component. The rotor housing has an inlet and an outlet, and the rotor is provided in the rotor housing for rotation about a desired axis of rotation defining an axial direction. The rotor can be magnetically driven without contact, and the connecting tube connects the inlet or the outlet of the rotor housing to the single-use component such that in the operating state the fluid flows through the connecting tube. The reusable device includes a stator, by which the rotor is magnetically driven without contact for rotation about the desired axis of rotation in the operating state.

First claim

The invention claimed is:

1 . An electromagnetic rotary drive comprising:
a single-use device configured for single use; and a reusable device configured for multiple use, the single-use device comprising a rotor housing with a rotor, a connecting tube for a fluid, and a single-use component, the rotor housing having an inlet and an outlet, the rotor disposed in the rotor housing to rotate about a desired axis of rotation defining an axial direction, the rotor configured to be magnetically driven without contact, and the connecting tube connecting the inlet or the outlet of the rotor housing to the single-use component such that in an operating state the fluid flows through the connecting tube, the reusable device comprising a stator, by which the rotor is configured to be magnetically driven without contact to rotate about the desired axis of rotation in the operating state, the stator comprising a plurality of windings configured to generate an electromagnetic rotating field to drive the rotor, and the stator having a stator housing with a feedthrough for the connecting tube, the stator openably designed with a first stator part and a second stator part configured to be moved relative to each other, in an open position of the stator, the connecting tube capable of being inserted into the feedthrough, and in a closed position of the stator the feedthrough enclosing the connecting tube.

2 . The electromagnetic rotary drive according to claim 1 , wherein the first stator part and the second stator part are connected to each other by a joint.

3 . The electromagnetic rotary drive according to claim 2 , wherein an electrical connection passes through the joint.

4 . The electromagnetic rotary drive according to claim 1 , wherein a mechanical fixing device is provided at the stator housing, with which the first stator part is detachably fixed to the second stator part in the closed position.

5 . The electromagnetic rotary drive according to claim 1 , wherein a mechanical centering device is provided which centers the first stator part relative to the second stator part in the closed position of the stator.

6 . The electromagnetic rotary drive according to claim 1 , wherein the stator housing is substantially cylindrically, and the first stator part is longer than the second stator part, viewed in the circumferential direction.

7 . The electromagnetic rotary drive according to claim 1 , wherein at least one winding is provided in each of the first and second stator parts, and the number of windings in the first stator part is different from the number of windings in the second stator part.

8 . The electromagnetic rotary drive according to claim 1 , wherein the stator is a bearing and drive stator, with which the rotor is capable of being magnetically levitated without contact with respect to the stator in the operating state.

9 . The electromagnetic rotary drive according to claim 1 , in which the rotor comprises a magnetically effective core, and the stator has a plurality of stator poles which are arranged around the magnetically effective core, and each of the stator poles is bounded by an end face facing the magnetically effective core of the rotor.

10 . The electromagnetic rotary drive according to claim 9 , wherein the electromagnetic rotary drive is a temple motor, the stator has a plurality of coil cores, each of which comprises a rod-shaped longitudinal leg which extends from a first end in the axial direction to a second end, and a transverse leg which is arranged at the second end of the longitudinal leg and which extends in a radial direction perpendicular to the axial direction, each transverse leg forming one of the plurality of stator poles, and at least one concentrated winding is arranged at and surrounds each longitudinal leg.

11 . The electromagnetic rotary drive according to claim 1 , wherein the rotor extends in the axial direction from a first end to a second end, a magnetically effective core is provided at each of the first and second ends, and the stator is a first stator and the electromagnetic rotary drive includes a second stator, the first and second stators are arranged spaced apart with respect to the axial direction, each of the first and second stators is arranged and designed to cooperate with exactly one of the magnetically effective cores such that the rotor is magnetically levitated without contact with respect to the stators in the operating state.

12 . The electromagnetic rotary drive according to claim 11 , further comprising a controller arranged at or in the first or the second stator part.

13 . A single-use device for an electromagnetic rotary drive, comprising:
a rotor housing with the rotor; a single-use component; and a connecting tube, the rotor housing having an inlet and an outlet, the rotor disposed in the rotor housing to rotate about a desired axis of rotation defining an axial direction, the rotor configured to be magnetically driven without contact, and the connecting tube connecting the inlet or the outlet of the rotor housing to the single-use component such that in an operating state fluid flows through the connecting tube, the rotor configured to be magnetically driven without contact to rotate about a desired axis of rotation in the operating state by a stator comprising a plurality of windings configured to generate an electromagnetic rotating field to drive the rotor, and having a stator housing with a feedthrough for the connecting tube, the stator openably designed with a first stator part and a second stator part configured to be moved relative to each other, in an open position of the stator, the connecting tube capable of being inserted into the feedthrough, and in a closed position of the stator the feedthrough enclosing the connecting tube.

14 . The single-use device according to claim 13 , wherein the single-use device is configured to be assembled into a pre-assembled unit configured to be entirely inserted into a reusable device.

15 . The single-use device according to claim 13 , which is enclosed sterilized in a package.

Assignees

• Levitronix Gmbh

Inventors

• Steinert Daniel
• Hubmann Emanuel
• Schöb Reto

Classifications

• H02K21/16

  having annular armature cores with salient poles (with homopolar co-operation H02K21/20) · CPC title

• H02K1/2733

  Annular magnets · CPC title

• C12M27/00

  Means for mixing, agitating or circulating fluids in the vessel (by introduction of gas C12M29/06, C12M29/14, mixing in general or mixers per se B01F; mixing in apparatus for chemical or physical processes B01J) · CPC title

• C12M23/28

  disposable or single use · CPC title

• H02K15/50

  Disassembling, repairing or modifying dynamo-electric machines (repairing of cooling fluid boxes H02K15/38) · CPC title