Combination of an electric rotary machine with a converter unit and wind turbine

Patent metadata

Field	Value
Publication number	US-11223307-B2
Application number	US-201917041961-A
Country	US
Kind code	B2
Filing date	Feb 11, 2019
Priority date	Mar 27, 2018
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

A rotary machine includes a rotor rotatable about a rotation axis and a stator mechanically divided into stator segments, each covering a respective section in relation to the rotation axis. Coils of one individual multi-phase rotary system are respectively arranged in the stator segments, each having terminals which connect phase lines of an individual multi-phase rotary system and are connected to the coils. A converter unit includes multiple subunits operated independently of one another, each forming an individual multi-phase rotary system. The number of phases of the subunits corresponds to the number of stator segments. The terminals of the stator segments are each connected to a subunit. The stator segments form groups of directly successive stator segments when viewed about the rotation axis. The terminals of the stator segments are connected to the same sub-unit within each group, but connected to different sub-units from group to group of stator segments.

First claim

What is claimed is:

1. Apparatus, comprising:
an electric rotary machine including a rotor mounted for rotation about an axis of rotation, a stator mechanically divided into a number of stator segments, with each of the stator segments covering a sector in relation to the axis of rotation, and coils of an individual multi-phase rotary system arranged in the stator segments, respectively, with the stator segments having each terminals for connecting phase wires of the individual multi-phase rotary system, said terminals being connected to the coils of the phases, said stator segments forming groups of immediately successive stator segments, when viewed about the axis of rotation, with the groups of stator segments being each made of a plurality of stator segments, said groups of stator segments extending each over 360°/n, wherein n is equal to a number of subunits connected to the coils of the rotary machine; and
a converter unit including a plurality of subunits which are independently operable of one another and form each of the individual multi-phase rotary systems, with a number of phases of the subunits matching a number of phases of the stator segments, said terminals of the stator segments of the rotary machine being connected to the subunits such that the terminals of the stator segments within a respective one of the groups are connected to a same one of the subunits of the converter unit and the terminals of the stator segments of the successive groups of stator segments, when viewed about the axis of rotation, are connected to subunits of the converter unit which differ from one another, said converter unit further including a switching device arranged between the subunits and the coils of the rotary machine and configured to enable adjustment as to which of the subunits of the converter unit is connected to the coils of which group of stator segments,
wherein in the event of a failure of one of the subunits of the converter unit, a resultant force acts on the rotor in a radial direction, and
wherein in the event of a failure of one of the subunits of the converter unit, the subunits are connected to the groups of stator segments in such a way that the direction of the resultant force is directed to counter a weight force as exerted by the rotor.

2. The apparatus of claim 1 , wherein the terminals of each stator segment are connected to a plurality of groups of immediately successive coils, when viewed about the axis of rotation, which groups are arranged on the stator segment, and wherein arranged between every two groups of immediately successive coils, when viewed about the axis of rotation, of one of the phases is one group of immediately successive coils, when viewed about the axis of rotation, of each of another of the phases.

3. The apparatus of claim 2 , wherein the number of coils per coil group amounts to one, or is greater than one.

4. The apparatus of claim 1 , wherein the stator includes partial ring wires, which extend over a partial circumference, when viewed about the axis of rotation, and which are each connected to the terminals of the stator segments of an individual group of stator segments.

5. The apparatus of claim 4 , wherein the partial ring wires for each phase each have a further terminal for connecting the respective partial ring wire to one of the subunits of the converter unit.

6. The apparatus of claim 1 , wherein the rotor is embodied as an external rotor.

7. The apparatus of claim 1 , wherein the number of phases amounts to three.

8. A wind power installation, comprising:
an electric rotary machine including a rotor mounted for rotation about an axis of rotation, a stator mechanically divided into a number of stator segments, with each of the stator segments covering a sector in relation to the axis of rotation, and coils of only an individual multi-phase rotary system arranged in the stator segments, respectively, with the stator segments having each terminals for connecting phase wires of the individual multi-phase rotary system, said terminals being connected to the coils of the phases, said stator segments forming groups of immediately successive stator segments, when viewed about the axis of rotation, with the groups of stator segments being each made of a plurality of stator segments, said groups of stator segments extending each over 360°/n, wherein n is equal to a number of subunits connected to the coils of the rotary machine;
a converter unit including a plurality of subunits which are independently operable of one another and form each of the individual multi-phase rotary systems, with a number of phases of the subunits matching a number of phases of the stator segments, said terminals of the stator segments of the rotary machine being connected to the subunits such that the terminals of the stator segments within a respective one of the groups are connected to a same one of the subunits of the converter unit and the terminals of the stator segments of the successive groups of stator segments, when viewed about the axis of rotation, are connected to subunits of the converter unit which differ from one another, said converter unit further including a switching device arranged between the subunits and the coils of the rotary machine and configured to enable adjustment as to which of the subunits of the converter unit is connected to the coils of which group of stator segments, wherein in the event of a failure of one of the subunits of the converter unit, a resultant force acts on the rotor in a radial direction, and wherein in the event of a failure of one of the subunits of the converter unit, the subunits are connected to the groups of stator segments in such a way that the direction of the resultant force is directed to counter a weight force as exerted by the rotor; and
a wind turbine configured to drive the rotor of the electric rotary machine.

9. The wind power installation of claim 8 , wherein the terminals of each stator segment are connected to a plurality of groups of immediately successive coils, when viewed about the axis of rotation, which groups are arranged on the stator segment, and wherein arranged between every two groups of immediately successive coils, when viewed about the axis of rotation, of one of the phases is one group of immediately successive coils, when viewed about the axis of rotation, of each of another of the phases.

10. The wind power installation of claim 9 , wherein the number of coils per coil group amounts to one, or is greater than one.

11. The wind power installation of claim 8 , wherein the stator includes partial ring wires, which extend over a partial circumference, when viewed about the axis of rotation, and which are each connected to the terminals of the stator segments of an individual group of stator segments.

12. The wind power installation of claim 11 , wherein the partial ring wires for each phase each have a further terminal for connecting the respective partial ring wire to one of the subunits of the converter unit.

13. The wind power installation of claim 8 , wherein the rotor is embodied as an external rotor.

14. The wind power installation of claim 8 , wherein the number of phases amounts to three.

Assignees

• Flender Gmbh

Inventors

• Ade Michael
• Jöckel Andreas
• Schönbauer Norbert

Classifications

• F05B2240/85

  Electrical connection arrangements · CPC title

• F03D9/25

  the apparatus being an electrical generator (F03D9/22 takes precedence) · CPC title

• F05B2240/21

  for wind turbines · CPC title

• Y02E10/72

  Wind turbines with rotation axis in wind direction · CPC title

• F05B2220/706

  an electrical generator · CPC title