JPS5928848A - Salient-pole type synchronous machine - Google Patents

Abstract

PURPOSE:To prevent the increase in an iron loss of a salient-pole type synchronous machine and the abnormal temperature rise of the machine by dividing a pole terminal board which retains both laminated ends of a field core into a body and a head, and forming the head of a nonmagnetic material, thereby eliminating the flow of a magnetic flux to the side surface of the end of a stator core. CONSTITUTION:The field pole 5 of a rotor of a salient-pole type synchronous machine is formed of a field core 4 laminated with punched steel plates, a pole end board 3 for retaining both axial ends and a field coil 6 wound on a body through an insulating layer, and a plurality of the poles are arranged circumferentially at the prescribed interval on the outer peripheral surface of a rotor yoke 7 which rotates together with a rotational shaft 25. At this time the board 3 is divided into a head 3a and a body 3b, the head 3a is formed of nonmagnetic steel material such as SUS304 or the like and welded to the body 3b. Accordingly, a magnetic flux which flows to the side surface of the end of a stator core 1 can be prevented by the head 3a, and the increase in the iron loss and the temperature rise of the core 1 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement of a salient pole type rotor having a lug type rotor, such as a water turbine generator or a synchronous motor.

[Technical cost of the invention 1) ↓] As is well known, the field pole of the rotor of this iJj salient pole type rotary machine (
5) is the first figure] 7 As shown in Figure 3, the field (1) l
Iron core (4) and its 111I11 direction both ☆: 1.1 4m end plate C1), those) 11, 11 parts (
4b), (,3h) with the predetermined 11'l! Marginal layer (6h)
It consists of a field winding (6) wound through a wire (1) through (1) through (6). This world IIZl pole (5) 11 rotations + l1l)
On the surface of the rotor I(Iθ((7)), which rotates with the rotor I(Iθ(7)), multiple field poles are arranged at predetermined intervals in the circumferential direction. The connection between the yoke (force) and the yoke (force) is made by cutting the yoke (extending in the axial direction on the surface of the force) into the dovetail ii/i fRl and one of the dovetail protrusions (9).
The administrative agency is determined by the first part. The field core (4) and the magnetic pole end plate (3) thus have a dovetail protrusion (9) on the bottom, and on the opposite side, that is, on the head (4a) and (3a) side, there is a circumferential groove. A protruding part U is provided which protrudes in the axial direction, and the field (sieve 0 wire (6)) is locked by the protruding part (10) and moves to 1f (a winding (6)) with rotation. The centrifugal force is generated by the head of the field core (4a) and the head of the pole tip plate (
Acts on 3a).

Therefore, the field core (4) and 6&end plate (3) are strong enough to prevent the vortex 1 (I1 box C1) generated on the surface of the magnetic pole head (4a).
The reason why the loss is a little smaller is p) 1 "Tesa" 6 Tomotake 3
．． Assume that 2 mug magnetic 1.'tomo l0 punched steel plates are stacked in a so-called stratified manner, and Ii? The end plate (3) is made of magnetic N4J steel, forged steel or rolled steel 4K.
'J is used as 4'AAi'l.

Then, contact the (M pole > 1^1 plate (3)) to both ψ111 of the stratified h two-field iron core (4), and after sufficiently compressing the IF 17, tighten with bolts or rivets (shown, U). ing.

Field pole 1! il Ir, I, energizing the field winding (6),
Predetermined (magnetic poles (N pole, S pole)) are formed respectively, and the magnetic flux generated thereby is transferred to the field pole (5) through the air gap (11
) by chaining the stator winding (2) incorporated in the cylindrical stator core (1) facing each other via I7,
In the case of a generator, the rotor is rotated by power to generate power to the stator winding (2), and in the case of an electric motor, the stator winding (2) is also supplied to the rotor. It generates torque.

In order to obtain this L length of magnetic flux, the axial length of the field pole (5) including the detached end plate (3) was conventionally as shown in Fig. 1 compared to the axial length of the stator core. or the second
As shown in the figure, it was also set to 'lr'.

[Back) jt technique j; ke 1 point] This 1: Una field pole (5) is a very common rotating 1" machine, it is lI & between j (9), e, r, but 11 (
As in the case of close rotation 1" to the single machine outside 111 increase dog, 1" air loading, (II air loading?! i.e. (in
Extreme 4K (3) wo;if+ 31:Ii master (
if) A part of the bundle is attached to the stator core (1) as shown by the arrows in Figures 1 and 2. 1' to ll
It flows from the direction b, and as a result, it causes eddy loss in the stator core (1) and increases the amount of iron 11.

This resulted in an abnormal hood of 10kl in the stator core (1),
This in turn leads to a decrease in efficiency and excessive heating of the stator windings.Furthermore, the iron loss and stray load JR occurring in the end plate (3) themselves also increase, which also causes the temperature to rise.

Efficiency (! By increasing the magnetic resistance between part (3a) and both 'j1 = child cores (not shown), the iron core group 7; However, as mentioned above, in recent years rotating TILs with large electrical and magnetic loads have been
However, due to the constraints of mechanical stress, the head (3a) of the end plate is lowered thicker than the head (4a) of the field core. There was a problem that it was too crowded.

[Purpose of the invention]

The present invention is designed to reduce l'il of magnetic flux to the stator core end 111j plane.
The purpose of the present invention is to provide a protruding rod type synchronous machine with two rows of field poles that are designed to prevent losses and reduce losses.

[41r of the invention (required)] In the present invention, part or all of the head of the pole tip plate is formed of a non-magnetic material to prevent the magnetic flux from flowing to the side surface of the end of the stator core, This prevents an increase in core loss and abnormal temperature rise in the stator core, and
The purpose is to reduce the iron 4 member and stray load loss generated in the field pole itself, and also to prevent humidity build-up in the field pole itself.

[Embodiments of the invention]

Hereinafter, an example of the present invention /J(Ii) will be explained with reference to Figures 5 to 7. In these figures,
2J' 1 The same parts as in Figs.

In Figure 5, 01j II stator frame and stator core (
1), and the stator core (1) is tightened with the bolts (stud C+:t) and nuts C2/1 via the spacing piece (21) and the holding plate ti'l+. show. Also, (25) is the rotation axis, R11', W)
, (71kaIl'4? wear; h, teL,Q LE shape ij
M Show-r. C2G) is a bolt that can tighten the field core (4). Therefore, in this embodiment, the Qll shown in FIG.
<The lamination length TUB of the stator core (1) and the lamination length TJRN of the field (i1' + iron core (4)) are equal, and 6° The body part (3b) is made of conventionally used cast steel, forged steel or press 11 [conditioned steel, etc.], and the head part is made of Nihon Kogyo. Standard (,TTS) 8!JS
It is made of non-magnetic steel such as 304. Then, the head made of non-straight steel (3a) and the body made of magnetic phase 1 (3+,
) and 1i17. Connected by child beam welding
Rir. Others are the conventional example shown in Figs. 1 and 3 and 11]
).

Next, I will explain hl) regarding 1).

Magnetic pole☆;1. Eye 1i (3) is a non-straight steel head (3a)
and the body (3h) made of magnetic material are joined by one-ion beam welding, so even though they are made of different metals, there is little thermal deformation and dimensions 'B I *, kJ, good and strong connection. has been done. 17 The way the 4 bundles pass from the field pole (5) to the stator core (1) is as shown by the arrow P in Figure 7. (3a) is because the magnetic resistance is a dog】1 [1, but the body of the pole tip plate (3
The 411 flux that has penetrated from the bottom of the field core (41
fillj, and flows to the stator core (1), and since there is no leakage magnetic flux that enters from the side of the stator iron IC (beam 1), the iron loss in the stator core (1) is small, and the stator Optical overheating at the end of the iron core (1) is unlikely to occur. Also, the field pole (5
) facing the stator core (1) is entirely stratified σ(,
A world made of one board! Since it is a +11 iron core (4), the field pole (5
) It is possible to prevent the temperature of the field pole (5) from rising by reducing the iron loss and stray load loss generated in the field pole (5) itself. These effects have great advantages, such as preventing the stator winding (2) from heating up excessively and improving the efficiency of the rotating electric machine as a whole.

As another embodiment partially modified from the embodiment shown in FIGS. 5 to 7 above, the stator core (
1) Considering the stepped part (1 length ■, 1 [↓ small gap length 0 (also shown in Fig. 6)), ((then, 0 (Th
By setting s -Li5t≦(Ln 10O) x 2, yL of 1-. field 4'+i III;, (!'i) for l''II, the lamination length Ls of stator core (1) (Even if the product Mt length r, nN of the garden iron core (4) is made somewhat shorter, the effect of the actual Mi example shown in FIGS.

Next, another example shown in FIG. 13 will be explained.

This actual btIIIFI is the body part (3b) of the pole tip plate (3).
and 1111 (3c) etc. which are joined to the field core (4), that is, the 111th part of the body (3b).
Let 1' be gender 4A 4, ;l ) j+7, and! The axial protrusion part On of the 1h1 plate is made of non-1 ("i'+ 6'14 and L,
These two are joined by electron beam welding, and the length of the stator core (rrn) is the length of the part of the field f11 pole (!'i) that is made of magnetic material 111 and faces the stator core (1). This is the case when ■ and ♂ are made equal. .

In this case, the magnetic flux]111 direction is 1, and the field 4; fij (51's (1 &
The part (3c) consisting of

(4) directly to the stator core (1) as shown in FIG. 5 and FIG.
) entering from the side r) 1! Since there is no I-bundle, the effect similar to that of the previous embodiment is obtained.
Since c) is not a stratified core but a block core, the stray load It1 in that part is A4 (although it is
In the example of the figure, l,! ! This is because it becomes more than the total amount.

As a partially modified embodiment of the embodiment shown in FIG. 8 above, the stator core (1) shown in FIG. Considering the minimum gap length G, by setting o < r, s - T claw ≦ (work, n 10) x2, that is, the lamination length T' of the stator core (1)
Even if the length of the part of the field pole (5) that faces the stator core (]), which consists of the magnetic field pole (5) and faces the stator core (), is somewhat shortened, the effect is almost the same as that of the embodiment shown in Fig. 8. will be 41.

Next, other embodiments shown in FIGS. 9 and 10 will be described.

In this embodiment, the head (3a) of the pole tip plate is made of a non-magnetic insulating material with excellent strength, such as fiber-reinforced plastic, or a non-magnetic metal material, such as aluminum or its alloy, and the body (3b) is made of magnetic abrasive material, and the 16th position of the head (3a) relative to the body (3h) is a dovetail. iJ
7 (Dovetail thrust with 121); (Do it by joining the i wrinkle, and then connect the head (3a) to the body (3h)) 04
3. The rest is the same as the actual example shown in FIGS. 5 to 7 or a partially modified example thereof.

Even if this is done, the actual h ([i example or a partially modified example thereof and the concave (: i
+i: Effect〃J: 9↓ is 1 (1). Note that the present invention i-J: is not limited to the actual hf;i example described in and shown in the drawings; *;1,1
Even if the entire plate is made of non-magnetic l1, J: No, Part 1] 3
It goes without saying that it can be carried out in the same way as 1a, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 3, 3, 3, 3, 4, 5, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, and 1,.

〔Effect of the invention〕

As explained above, according to the present invention, a part of the head of the pole tip plate or the entire L1 is formed of non-magnetic material. 1: The stator core Since magnetic flux is prevented from flowing into the side surfaces of the end, the iron loss of the stator core increases and! ′
+1 Prevents habitual 1st 1 upper row, and reduces stray load (a) generated on the field pole itself, prevents temperature rise of the field pole itself, improves efficiency and reliability. Excess protruding rod type synchronization (furrow is in).

[Brief explanation of the drawing]

Figures 1 and 2 are longitudinal sectional views showing the main parts of a conventional projector (i-type 1111 machine), Figure 3, and the main field poles common to Figures 1 and 2. Partially broken showing part ((
R perspective view, Figure 4 is further h'? The conventional salient pole type synchronous (
FIG. 5 is a longitudinal cross-sectional view of the main part of a salient pole 71'g synchronous machine of the present invention; FIG.
The figure is an enlarged sectional view taken along the line Vl-Vl in Fig. 5, and
The figure is an enlarged sectional view of the main part of Fig. 5, Figs. 8 and 9 are longitudinal sectional views of the main part showing other actual M1 examples of 1°L, respectively, and Fig. 10 is a cross-sectional view of the main part taken along the line X-X of Fig. 9. FIG. 1... Stator core 3... Magnetic pole +4f plate 3a...
・End plate head 3b ・End plate body 4 ・Field core 4a...
7... Rotor yoke 10... Axial protrusion of end plate 11... Gap 12... Dovetail groove
13 ・Dovetail protrusion 14... Bolt 15 ・
Paragraph part (3257) Agent Patent Attorney Inoue - Male Figure 111 q IIS Figure 6m

Claims (1)

[Scope of Claims] (1) Field 6+i (Ifiir; Il, rotation −
7) Punching (v.1 plate) having magnetic pole heads disposed at predetermined intervals in the circumferential direction of the outer peripheral surface of the 1-pole iron and locking and holding the field winding on the radially outer part thereof. A field core consisting of stratified layers 1 and 11 (a magnetic pole end plate having an end plate head that holds the stratified end of the core and locks and holds the field winding at the radially outer part); Eh, in a salient pole type synchronous machine in which a field winding is wound around a 1° pole and the field core through a predetermined insulating layer, how many plates of the field pole are used? A protruding rod type synchronous machine characterized in that a part or the whole of the head is made of non-magnetic material. (2) The end plate head is made of magnetic material on the side that comes into contact with the field iron core, The first term of the scope of the FM search is characterized by the fact that the protrusion in the ill+ direction of the end plate is formed of non-(ii, "k-based material, and both are joined by electron beam welding!?") The salient pole type synchronous machine described. (3) The entire head of the end plate of the magnetic pole plate is made of a non-magnetic material, and the body of the plate is made of a magnetic material, and both of them are made of a 1d
Patent tiW characterized by joining by child beam welding
A salient pole type synchronous machine according to item 1. (41(irt 4i y+'ili plate is end plate ν1"1
The entire portion is made of a non-magnetic material, the end plate body is made of a magnetic material, and both are joined by a dovetail 7111 leaf and a dovetail protrusion, and are also joined by bolting. The salient pole type synchronous machine described in item 1. (5) The length of the part of the field pole that is made of magnetic material and faces the stator core is within twice the sum of the length of the stator core and the minimum air gap length relative to the laminated length of the stator core. A salient pole type synchronous machine according to any one of claims 1 to 4, characterized in that the length of the salient pole type synchronous machine is shortened.