US 2024/0405642 A1 · ELECTRIC ROTARY TRANSFORMER

Abstract

An electric rotary transformer for inductive energy transmission is disclosed. The rotary transformer includes a rotary transformer stator including a transformer primary coil and a rotary transformer rotor, rotatable during operation relative to the rotary transformer stator about an axially running rotation axis, including a transformer secondary coil. The transformer secondary coil and the transformer primary coil interact inductively during operation for generating a transformer voltage in the transformer secondary coil. The transformer secondary coil and/or the transformer primary coil has at least one electric conductor, through which a flow path of a fluid is guided. During operation a fluid flows along the flow path and cools the rotary transformer.

Claims20

Dependent claims

An electric rotary transformer for inductive energy transmission, comprising:

a rotary transformer stator including a transformer primary coil,
a rotary transformer rotor, rotatable during operation relative to the rotary transformer stator about an axially running rotation axis, the rotary transformer rotor include a transformer secondary coil,
wherein the transformer secondary coil and the transformer primary coil interact inductively during operation for generating a transformer voltage in the transformer secondary coil,
wherein at least one of the transformer secondary coil and the transformer primary coil has at least one electric conductor, through which a flow path of a fluid is guided, and
wherein during operation a fluid flows along the flow path and cools the rotary transformer.

2 more elements

A separately excited electric synchronous machine, comprising:

a machine rotor including a rotor shaft and a machine rotor coil, provided in a rotationally fixed manner on the rotor shaft, the machine rotor coil generates a rotor field during operation,
a machine stator including a machine stator coil fixed with respect to the machine stator, the machine stator coil generates in operation a magnetic stator field that interacts with the rotor field such that the machine rotor during operation rotates about an axial rotation axis,
a rotary transformer, the rotary transformer including:
a rotary transformer stator including a transformer primary coil,
a rotary transformer rotor, rotatable during operation relative to the rotary transformer stator about an axially running rotation axis, the rotary transformer rotor include a transformer secondary coil,
wherein the transformer secondary coil and the transformer primary coil interact inductively during operation for generating a transformer voltage in the transformer secondary coil,
wherein at least one of the transformer secondary coil and the transformer primary coil has at least one electric conductor, through which a flow path of a fluid is guided, and wherein during operation a fluid flows along the flow path and cools the rotary transformer, wherein the rotary transformer stator is fixed with respect to the machine stator,
wherein the rotary transformer rotor is arranged on the machine rotor in a rotationally fixed manner, and
wherein the machine rotor coil is connected to the transformer secondary coil such that the machine rotor coil is supplied during operation with a direct voltage for generating the rotor field.

6 more elements

A motor vehicle, comprising:

a separately excited electric synchronous machine the separately excited electric synchronous machine including:
a machine rotor including a rotor shaft and a machine rotor coil, provided in a rotationally fixed manner on the rotor shaft, the machine rotor coil generates a rotor field during operation,
a machine stator including a machine stator coil fixed with respect to the machine stator, the machine stator coil generates in operation a magnetic stator field that interacts with the rotor field such that the machine rotor during operation rotates about an axial rotation axis,
a rotary transformer, the rotary transformer including:
a rotary transformer stator including a transformer primary coil,
a rotary transformer rotor, rotatable during operation relative to the rotary transformer stator about an axially running rotation axis, the rotary transformer rotor include a transformer secondary coil,
wherein the transformer secondary coil and the transformer primary coil interact inductively during operation for generating a transformer voltage in the transformer secondary coil,
wherein at least one of the transformer secondary coil and the transformer primary coil has at least one electric conductor, through which a flow path of a fluid is guided, and
wherein during operation a fluid flows along the flow path and cools the rotary transformer,
wherein the rotary transformer stator is fixed with respect to the machine stator,
wherein the rotary transformer rotor is arranged on the machine rotor in a rotationally fixed manner, and
wherein the machine rotor coil is connected to the transformer secondary coil such that the machine rotor coil is supplied during operation with a direct voltage for generating the rotor field;
and
a cooling circuit, in which the synchronous machine is integrated, so that the fluid circulates along the flow path.

11 more elements

Dependencies are inferred from the claim text.

Electric rotary transformer

Life of this patent

Electric rotary transformer

Life of this patent

Abstract

Claims20