NZ618085B2 - Electric machine, synchronous generator-field pole, synchronous generator-rotor comprising a plurality of field poles and method for producing a synchronous generator-field pole of an electric machine - Google Patents
Electric machine, synchronous generator-field pole, synchronous generator-rotor comprising a plurality of field poles and method for producing a synchronous generator-field pole of an electric machine Download PDFInfo
- Publication number
- NZ618085B2 NZ618085B2 NZ618085A NZ61808512A NZ618085B2 NZ 618085 B2 NZ618085 B2 NZ 618085B2 NZ 618085 A NZ618085 A NZ 618085A NZ 61808512 A NZ61808512 A NZ 61808512A NZ 618085 B2 NZ618085 B2 NZ 618085B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- pole
- pole assembly
- tool
- plates
- synchronous generator
- Prior art date
Links
- 230000001360 synchronised Effects 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 210000001699 lower leg Anatomy 0.000 claims description 26
- 230000000712 assembly Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 238000003475 lamination Methods 0.000 abstract 1
- 210000003128 Head Anatomy 0.000 description 32
- 238000004804 winding Methods 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 210000003414 Extremities Anatomy 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 210000001331 Nose Anatomy 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/26—Rotor cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49009—Dynamoelectric machine
- Y10T29/49012—Rotor
Abstract
The invention relates to field pole for a synchronous generator-rotor comprising a plurality of field pole segments (101-106) that are offset in relation to each other and that each have a plurality of identical field pole laminations. Each field pole lamination has a pole shaft (110) with a first centre line (118) and a pole head (120) with a second centre line (128). The first and second centre lines can be different from each other in adjacent pole segments (101-106). entre line (118) and a pole head (120) with a second centre line (128). The first and second centre lines can be different from each other in adjacent pole segments (101-106).
Description
Aloys Wobben
Argestrasse 19, 26607 Aurich
Electric machine, onous generator-field pole, synchronous generator-
rotor comprising a” plurality of field poles and method for ing a
synchronous tor-field pole of an electric machine
The present invention concerns an electric machine, in particular a
synchronous generator pole ly, a synchronous generator rotor
having a plurality of pole assemblies and a process for the production of a
synchronous generator pole assembly.
ic machines, for example electric generators, in particular
synchronous generators, have a generator rotor having a plurality of pole
assemblies. Such pole assemblies usually comprise a large number of.
stamped pole assembly plates. The pole assembly plates are then
laminated on to each other and can be for example welded together.
GB 2 389 241 shows a stator of an electric motor having a plurality
of pole heads. The pole heads have a large number of pole assembly
plates.
In addition as general technological background attention is directed
to DE 11 2007 000 201 T5, US No 4 616 151, DE 41 14 989 A1, DE 11
2008 002 686 T5 and JP 2007—060800.
EP 1 275 192 Bl shows a pole assembly and a process for the
production of a pole assembly. The pole assembly comprises a plurality of
stamped pole heads of the pole assembly plates, the pole heads being
respectively displaced ve to each other. Each pole ly plate has
a main body (substantially rectangular) and a pole head, n the pole
head has a curvature and the pole head projects laterally beyond the main
3O body.
The stamping apparatus has a stationary tool which serves to stamp
out the free ends of the pole head. A second tool is movable on a straight
line transversely relative to the conveying direction of the plate, relative to
the first tool, and serves to stamp out all other contours of the pole
assembly plate including the'radius of the pole head and the side surfaces
of the main body.
The pole assembly plates are produced in a three-stage process.
Firstly a plate is pushed into the first fixed tool of a stamping apparatus
where a first portion of the pole assembly plate is stamped. Then a second
portion which is displaced relative to the first portion is stamped out with
the second tool. After that, the tool is displaced transversely ve to the
conveying direction of the plate and the next pole assembly plate can be
stamped, in which case a main body is ced relative to the pole
assembly plate.
Then the stamped pole assembly plates can be stacked and joined
together for example by a weld seam. The weld seam is then ed in
the region of the main body so that the main bodies of the pole assembly
plates are fixed to each other. Because the main bodies are stamped out in
istepwise displaced relationship, the consequence of this is that the
assembled pole assembly plates are of an arrow-shaped configuration in
plan view.
An object of the present invention is to provide a synchronous
generator pole assembly and a s for the production of a synchronous
generator pole assembly, in particular for a synchronous or ring generator
rotor, which permits less expensive and easier cture of the pole
assemblies.
That object is attained by a pole assembly according to claim 1, a
synchronous generator rotor having a plurality of pole assemblies ing
to claim 4 and a s for the tion of a onous generator pole
assembly according to claim 5.
Thus there is provided a synchronous generator pole assembly
having a plurality of mutually displaced pole assembly segments which
respectively have a plurality of identical pole assembly plates. Each pole
3O assembly plate has a pole shank having a first centre line, and a pole head
having a second centre line. The first and second centre lines or the,
spacing between the first and second centre lines can be different from
each other in adjacent pole segments.
In an aspect of the present invention the number of the different
pole assembly plates is less than or equal to the number of the mutually
displaced pole assembly segments.
In a further aspect of the invention the pole assembly plates in
adjacent pole assembly segments respectively have a different angle or a
different spacing between the first and second centre lines.
In an aspect of the invention the arrangement of the pole assembly
segments in plan view is of an arrow—shaped and mirror-symmetrical
configuration.
The invention also ns a process for the production of pole
lies which respectively have a plurality of pole ly plates. The
pole assembly plates respectively have a pole shank and a pole head. A
plurality of first pole assembly plates is stamped out by stamping the first
portion (pole head) of the pole assembly plates by means of a first fixed
tool. The second portions (pole shank) of the pole ly plates is
d out by means of a second tool in a first pivotal angle. The second
tool is adapted to be pivotable relative to the first tool through an angle.
Then the second tool is pivoted relative to the first tool and a second
number of pole assembly plates is stamped out, the second tool being in a
second pivotal angle. The at least first and second pole assembly plates are
respectively assembled to afford at least a first and a second pole assembly
segment. The at least first and second pole assembly segments are fixed in
mutually relatively ced relationship (oriented relative to the pole
shank).
The invention concerns the idea that, instead of a plurality of
individual pole assembly plates which are only displaced stepwise being
assembled to afford a pole assembly, a plurality of pole assembly segments
are provided in stepped or ly ced relationship. In that case the
pole assembly segments comprise a plurality of identical pole assembly
3O . Thus it is not the individual pole assembly plates but the pole
assembly segments that are arranged in mutually displaced relationship.
That has the advantage that the number of pole assembly plate types to be
produced can be considerably reduced as only different pole assembly plate
types have to be produced in the maximum number of pole shoe segments.
Optionally the pole assembly plates are of such a uration that
they can be (re-)used by rotation through 180°, in another of the pole
assembly segments. Thus the actual number of pole assembly plate types
to be stamped out can be further reduced.
In an aspect of the present invention only three differently stamped—
out pole assembly plate types are required to afford the entire pole
assembly. The three pole assembly plate types can be used for the first
three ts and the three pole assembly plate types which are
respectively turned through 1800 can then be used for the fourth, fifth and-
sixth segments. Accordingly the six pole ly segments can be used
for a limb of the pole assembly and the other limb of the pole assembly can
be based on a correspondingly mirrored sequence of the pole assembly
segments of the first arm.
For ng out the pole assembly plates, in particular for stamping
out the head r, the stamping apparatus is pivoted in a plurality of
stages or through a plurality of angles.
The head contour of the pole heads ally has a first radius and
the opposite end of the pole assembly optionally has a second radius,
wherein the second radius is smaller than the first radius.
In an aspect of the invention a nary tool'stamps out the
contours of the pole head and a second tool which is movable relative
thereto (that is to say pivotable) stamps out the further side surfaces of the
pole shank. The second e tool is pivoted or swivelled relative to the
first tool through a predetermined angle. The centre line of the pole shank
does not have to coincide with the centre line of the pole head. Rather,
there is an angle between those two centre lines, which is achieved by the
pivotal movement of the second tool relative to the’ first.-
Contrary to the process bed in EP 1 275 192 Bl therefore there
is no displacement transversely relative to a feed direction of the plates,
but there is a pivotal movement in relation to the feed ion of the
plates.
According to the invention the pole assemblies are used in a
synchronous generator rotor _or in a ring generator rotor. Both the
synchronous generator and also the ring generator represent a slowly
rotating synchronous generator. The diameter of the synchronous
generator rotor or the ring generator rotor is lly several metres. The
synchronous generator or the ring generator has a power output of at least
100 kW, preferably at least 1 MW and can certainly also be 3 MW or up to
MW.
Further configurations of the invention are subject-matter of the
appendant claims.
Advantages and embodiments by way of example of the invention
are described in greater detail hereinafter with reference to the drawing.
Figure 1 shows a mmatic sectional view of a pole assembly
according to a first embodiment of the invention,
Figure 2 shows a plan view of a pole assembly according to the first
ment of the invention,
Figure 3 shows a side viewof a pole assembly according to the first
embodiment of the invention,
Figure 4 shows a section of a pole assembly plate for a pole
assembly according to a second embodiment, and
Figure 5 shows a cross-section of a further pole assembly plate for a
pole assembly according to the second embodiment.
The pole assemblies described hereinafter are used for a
synchronous generator rotor or a ring generator rotor.
Figure 1 shows a diagrammatic sectional view of a synchronous
generator rotor pole assembly according to a first embodiment of the
invention. The pole assembly 100 of the first ment has a number of
pole segments 101—106. Each pole segment 101—106 has a plurality of
cal pole assembly plates. Each pole assembly plate has a pole head
120 and a pole shank 110. The pole ly plates are ably
tively produced in one piece and in particular can be stamped out.
The pole shank 110 is of a substantially rectangular configuration and can
optionally have two noses 116 in the lower region. In addition there can
optionally be provided a plurality of welds 111, 112, 113 and 114. The first
end 117 of the pole shank 110 can have a radius of R1.
On each side the pole head 120 has a portion 123 which projects
beyond the pole shank 110. The top side 121 of the pole head 120 has a
radius of R2.
Each of the pole assembly segments 101—106 has a plurality of
identical pole ly plates. The sole differences between the respective
pole assembly plates in the different pole assembly segments lie in the
position of the pole shank 110 ve to the two projecting pole head
portions 123. The pole assembly plates within a pole assembly segment are
not arranged in displaced relationship but oriented relative to each other
and one behind the other on the pole shank. Only the pole-heads of the
pole assembly segments 1071-106 are arranged in mutually ced
relationship.
Each of the pole heads is preferably of equal width and each of the
'.pole shanks is also preferably of equal width. It is however also possible for
the pole heads and/or the pole shanks to be of differing widths.
The different pole assembly plate types differ from each other only
by the relative position of the pole shank relative to the outer portions of
the pole head.
Figure 2 shows a mmatic plan view of a pole assembly
according to the first embodiment. In this case the pole assembly has in
particular a plurality of pole assembly segments 101—106. Optionally the
pole ly segments 101—106 in the upper arm are arranged in mirror—
rical relationship with the pole assemblies 101—106 in the lower
arm.
Each of the pole assembly segments 101-106 comprises a plurality of
identical pole assembly plates which are welded or joined together. In
addition the pole assembly can be constructed with for example only six
3O different pole assembly plate types (corresponding to the pole shoe
ts 6).
Figure 3 shows a further side view of the pole assembly of the first
embodiment. The pole assembly segments 101—106 are also shown in
Figure 3. The pole assembly ts can be fixed for example by means
of the bores 130.
Figure s a sectional view through the pole assembly of Figure
2 along section line B—B. The centre line 128 of the pole head 120 differs
from the centre line 118 of the pole shank through an angle W2 or at a
spacing W2.
Figure 5 shows a cross—section of the pole assembly of Figure 2 along
the section line C-C. In this case a pole assembly plate of the pole
assembly segment 103 is shown. In this case the position of the centre line
128 of the pole head s from the position of the centre line 118 of the
pole shank h an angle W3. In this case the angle W3 is different from
the angle W2.
The various pole assembly segments shown in Figure 2 have
respectively identical pole assembly plates. The pole assembly of Figure 2
can be made up by 2 x 6 pole assembly segments. Accordingly a maximum
of six ent pole assembly plate types are required. The pole aSsembly
of Figure 2 however can also be made up with fewer than six different pole
assembly plate types. Optionally the pole ly of Figure 2 can be
made up with three different pole assembly plate types, each of the pole
assembly plate types having a pole head and a pole shank, n the
pole assembly plate types differ only in the relative position of the pole
assembly shank with respect to the pole assembly head. For example the
pole ly segment 106 can be of a configuration of being displaced
through 1800 relative to the pole assembly segment 101. The pole
assembly segment 105'is arrangedthrough 180° relative to the pole
assembly segment 102. The pole assembly segment 104 is arranged
displaced through 180° relative to the pole assembly segment 103.
In a further aspect of the invention the pole assembly according to a
second embodiment which can be based on the first embodiment can be
3O produced with only three different pole assembly plates. To produce the
different pole assembly plates a movable stamping tool is pivoted h a
pivotal angle before for example the pole shoe shank can be stamped out.
To produce the six pole assembly segments shown in Figure 2 only three
pole assembly plate types are required. Those pole assembly plates are
made possible by virtue of three different l angles of the second
stamping tool, n each angle can assume a positive value so that in
total six different pole assembly plates can be produced.
The invention also concerns a stamping apparatus comprising a first
fixed tool to which a plate is fed in the conveying direction. The first tool
stamps out a first portion, for example the portions 123. The stamping
apparatus further has a second tool which is pivotable or displaceable
relative to the first tool and which is used to stamp out the pole shank
and/or the pole head portion of the pole shoe portion.
A first step involves stamping out the pole head, that is to say the
portions 121, 122 and 123. Then the second tool is pivoted relative to the
first tool and the pole shank is stamped out in a next stamping step.
The pole assembly of the first or second embodiment can be
produced by three ent stamping processes. In the first stamping
process firstly the pole head is at least partially d out. Then a
second stamping tool is displaced ve to the first stamping tool and the
pole shank 110 is stamped out. Alternatively to a cement of the
second tool relative to the first tool it is also possible to pivot the second
tool relative to the first tool. In an alternative stamping process the
respective pole ly plate types can be stamped out separately, that is
to say in a dedicated stamping machine. In such a stamping machine
displacement or pivotal movement of a second stamping tool is not
necessary but the pole assembly plate can be stamped out in a single
stamping step.
According to the invention the pole head 121—123 can be stamped
out in a single step so that the portions 121-123 can be stamped out
continuously and in one step. It is thus possible to e a pole head
without an edge in the region of the transition between the portions 121
and 122. That permits tangential transition from the portion 121 on to the
portion 122.
The pole lies according to the invention are each ed
with a respective winding and electric excitation is fed to the winding so
that the pole assembly and the corresponding winding together with an
exciter current can produce a magnetic excitation which can cause a
magnetic pole. A pole of an ic machine is thus formed from a pole
assembly, a winding and an exciter current.
The pole assemblies according to the invention can be used in a
synchronous tor. A pole assembly segment for a ently
excited onous generator can be for example of a rectangular cross-
nal configuration, that is to say the pole assembly segments can only
be in the form of the pole shank according to the first and second
embodiment. To obtain a pole assembly for a permanently excited
synchronous generator, a plurality of pole assembly segments is arranged
in mutually displaced relationship. In that case each pole assembly
segment can be provided by a permanently excited magnet. Accordingly a
pole assembly can be formed from a plurality of permanent magnets which
are arranged in mutually displaced onship.
According to the invention the pole assembly plates can be produced
by means of cutting. In that case the cutting operation can e a
stamping-out operation, a lasering operation, a water jet cutting operation,
a cutting-out ion or a casting ion.
‘ The pole assembly according to the invention can be provided on a
rotor of a synchronous generator. This involves in particular an externally
excited synchronous generator. That is achieved in particular by a magnetic
pole being obtained, by an electric winding being provided around a pole
assembly, the winding being supplied with an r current.
Claims (7)
1. A synchronous generator rotor pole assembly having a plurality of mutually displaced pole assembly segments which respectively have a plurality of identical pole assembly plates, wherein each pole assembly plate has a pole shank having a first centre line, and a pole head having a second centre line, n the spacing between the first and second centre lines is ent at least in adjacent pole ly segments.
2. A pole assembly according to claim 1 wherein the number of the different pole assembly plates is less than or equal to the number of the mutually displaced pole assembly ts.
3. A pole assembly according to one of claims 1 and 2 wherein the pole assembly plates in adjacent pole assembly segments respectively have a ent angle or a different spacing between the first and second centre lines.
4. A pole assembly according to claim 1 wherein the arrangement of the pole ly segments in plan view is of an arrow-shaped and mirrorsymmetrical configuration.
5. A synchronous generator rotor having a plurality of pole assemblies according to any one of claims 1 to 4.
6. A process for the production of synchronous generator rotor pole assemblies which respectively have a plurality of pole assembly plates, wherein the pole assembly plates respectively have a pole shank and a pole head, comprising the steps: stamping out a plurality of first pole ly plates by stamping out a first portion of the pole assembly plates by means of a first fixed tool and by stamping out a second portion of the pole assembly plate by means of a second tool in a first pivotal angle, wherein the second tool is adapted to be relatively displaceable with respect to the first tool through an angle, pivoting the second tool relative to the first tool, stamping out a plurality of second pole ly plates by stamping out a first portion of the pole assembly plates by means of a first fixed tool and by stamping out a second portion of the pole assembly plate by means of a second tool, wherein the second stamping tool is in a second pivotal angle, assembling the at least first and second pole assembly plates to respectively afford at least one first and second pole assembly segment, and fixing the at least first and second pole assembly ts in relatively mutually displaced relationship.
7. A synchronous generator rotor pole assembly substantially as hereinbefore described with reference to accompanying
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011077217.0 | 2011-06-08 | ||
DE102011077217A DE102011077217A1 (en) | 2011-06-08 | 2011-06-08 | Polpaket, rotor with a plurality of Polpaketen and method for producing a Polpaketes |
PCT/EP2012/060595 WO2012168238A2 (en) | 2011-06-08 | 2012-06-05 | Electric machine, synchronous generator-field pole, synchronous generator-rotor comprising a plurality of field poles, and method for producing a synchronous generator-field pole of an electric machine |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ618085A NZ618085A (en) | 2015-12-24 |
NZ618085B2 true NZ618085B2 (en) | 2016-03-30 |
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