Electrically excited machine and contactless arrangement for an electrically excited machine

Patent metadata

Field	Value
Publication number	US-12166385-B2
Application number	US-202117339635-A
Country	US
Kind code	B2
Filing date	Jun 4, 2021
Priority date	Jun 19, 2019
Publication date	Dec 10, 2024
Grant date	Dec 10, 2024

Abstract

An electrically excited machine that includes a machine rotor and an exciter device for the electrical excitation of the electrically excited machine. The exciter device can include at least one energy transfer system integrated in and/or arranged inside the machine rotor. The machine rotor can include a rotor winding. The electrically excited machine can also include a machine stator. The machine stator can be arranged outside of the electrically excited machine.

First claim

The invention claimed is:

1. An arrangement for an electrically excited machine, the arrangement comprising:
a machine rotor; and
an exciter device for the electrical excitation of the machine, wherein the exciter device comprises at least one energy transfer system configured for contactless transfer of electrical energy,
wherein the at least one energy transfer system is arranged inside the machine rotor as an encapsulated system, and wherein an operating frequency of the at least one energy transfer system is independent of a speed of the electrically excited machine,
wherein the at least one energy transfer system comprises a primary side and a secondary side arranged concentrically around an axis of rotation of the machine rotor, and
wherein the primary side is located inside the secondary side.

2. The arrangement according to claim 1 , wherein the machine rotor has a machine rotor shaft and the at least one energy transfer system of the exciter device is arranged inside a cavity of the machine rotor shaft.

3. The arrangement according to claim 2 , wherein the machine rotor shaft has at least one opening for cooling the at least one energy transfer system.

4. The arrangement according to claim 1 ,
wherein the at least one energy transfer system of the exciter device comprises a rotating energy transfer device that is an external rotor; and/or
wherein the at least one energy transfer system of the exciter device comprises an exciter stator and an exciter rotor, wherein the exciter stator is made of a magnetically as well as electrically non-conductive material, and wherein the exciter stator has a bore for cooling.

5. The arrangement according to claim 4 , wherein the at least one energy transfer system is arranged inside the machine rotor such that the exciter rotor is connected to the machine rotor in a rotatably fixed manner.

6. The arrangement according to claim 1 , wherein the machine rotor has an exciter winding, and wherein the exciter device is configured to transfer, in a contactless manner, electrical energy from the primary side of the at least one energy transfer system to the secondary side of the at least one energy transfer system, and then from the secondary side of the at least one energy transfer system to the exciter winding of the machine rotor.

7. The arrangement according to claim 1 , wherein the exciter device further comprises a primary-side electronics device with an inverter and/or a secondary-side electronics device with a rectifier, wherein the primary-side electronics device further has a primary-side compensation unit, wherein the secondary-side electronics device further has a secondary-side compensation unit, and wherein the secondary-side electronics device is arranged on and/or outside a machine rotor shaft of the machine rotor.

8. The arrangement according to claim 1 , wherein the arrangement further comprises an energy source and/or a converter for controlling the electrically excited machine.

9. The arrangement according to claim 1 , wherein the electrically excited machine with the exciter device can be used as both a motor and as a generator without being controlled by external forces.

10. The arrangement according to claim 1 ,
wherein the exciter device comprises two or more energy transfer systems; and/or
wherein the exciter device further comprises at least one data transmission system, which is integrated inside the machine rotor.

11. The arrangement according to claim 1 , wherein an additional electrically conductive material layer is arranged on at least one active part of the energy transfer system, wherein an active part of the energy transfer system is part of the energy transfer system which is at least partially exposed to a magnetic field used for energy transfer, and wherein an electrical conductivity of the additional material layer is greater than the electrical conductivity of the at least one active part.

12. The arrangement according to claim 11 , wherein the additional electrically conductive material layer is arranged on a coil system of the at least one energy transfer system in the region of electrically poorly conductive and at the same time magnetically conductive materials, or in the region of electrically poorly conductive and at the same time magnetically non-conductive materials.

13. The arrangement according to claim 1 , wherein the at least one energy transfer system has a stator made of an electrically non-conductive material and/or a magnetically non-conductive material.

14. An electrically excited machine, comprising:
a machine stator;
a machine rotor; and
an exciter device for the electrical excitation of the machine,
wherein the exciter device comprises at least one energy transfer system configured for contactless transfer of electrical energy, and wherein the at least one energy transfer system is arranged as an encapsulated system inside the machine rotor,
wherein the at least one energy transfer system comprises a primary side and a secondary side arranged concentrically around an axis of rotation of the machine rotor, and wherein the primary side is located inside the secondary side, and
wherein an operating frequency of the at least one energy transfer system is independent of a speed of the electrically excited machine.

15. An electrically excited machine, comprising:
a machine rotor; and
an exciter device comprising at least one energy transfer system configured for contactless transfer of electrical energy, wherein the at least one energy transfer system, including contactless power transfer components thereof, is arranged inside a cavity of the machine rotor as an encapsulated system, wherein an operating frequency of the at least one energy transfer system is independent of an operating frequency of the electrically excited machine, and wherein the electrically excited machine with the exciter device can operate as both a motor and as a generator, and
wherein the at least one energy transfer system comprises a primary side and a secondary side arranged concentrically around an axis of rotation of the machine rotor, and wherein the primary side is located inside the secondary side.

16. The electrically excited machine of claim 15 , wherein the contactless power transfer components of the at least one energy transfer system comprise an exciter stator and an exciter rotor that are each arranged inside the cavity of the machine rotor.

17. The electrically excited machine of claim 15 , wherein the contactless power transfer components of the at least one energy transfer system comprise a coil system, the primary side, and the secondary side that are each arranged inside the cavity of the machine rotor.

Assignees

• Mahle Int Gmbh

Inventors

• Maier David
• Müller Samuel
• Parspour Nejila

Classifications

• H02K19/00

  Synchronous motors or generators (having permanent magnets H02K21/00) · CPC title

• H02K9/00

  Arrangements for cooling or ventilating (channels or ducts in parts of the magnetic circuit H02K1/20, H02K1/32; channels or ducts in or between conductors H02K3/22, H02K3/24) · CPC title

• H02K3/04

  Windings characterised by the conductor shape, form or construction, e.g. with bar conductors · CPC title

• H02J50/10

  using inductive coupling · CPC title

• H02K11/30

  Structural association with control circuits or drive circuits · CPC title