CN104218705B - A kind of rotor core structure of magneto - Google Patents
A kind of rotor core structure of magneto Download PDFInfo
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- CN104218705B CN104218705B CN201410411611.5A CN201410411611A CN104218705B CN 104218705 B CN104218705 B CN 104218705B CN 201410411611 A CN201410411611 A CN 201410411611A CN 104218705 B CN104218705 B CN 104218705B
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- magnet steel
- positioning interval
- interval block
- rotor
- block
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Abstract
The invention discloses the rotor core structure of a kind of magneto, it includes multi-disc rotor punching, multi-disc magnet steel and magnet steel retaining ring, on the outer round surface of part rotor punching, uniform integrated punching has and the positioning interval block of the quantity such as magnet steel, all rotor punchings make the positioning interval block alignment on axially when being overlapped into one, every magnet steel is inserted between circumferentially-adjacent two positioning interval block, and magnet steel retaining ring is sheathed on outside all magnet steel；Advantage is by part rotor punching upper punch compression set interdigit spacer block, not only conveniently realize the location to magnet steel, and simplify the structure of rotor core, simultaneously because of only at part rotor punching upper punch compression set interdigit spacer block, therefore positioning interval block is the least on the impact of motor inductances；Additionally, due to positioning interval block is integrally formed on rotor punching, therefore magnet steel only need to be inserted between circumferentially-adjacent two positioning interval block and can realize location well, the easy course of processing.
Description
Technical field
The present invention relates to a kind of motor, especially relate to the rotor core structure of a kind of magneto.
Background technology
At present, the rotor core that magneto is conventional mainly has following two structure.
The rotor core of the first structure is as shown in Figure 1; it includes iron core 11, magnet steel 12, magnet steel parting bead 13 and the magnet steel retaining ring 14 of cylinder; every magnet steel 12 is along the outer round surface being axially pasted on iron core 11 of iron core 11; magnet steel parting bead 13 is between two adjacent magnet steel 12 and is pasted on the outer round surface of iron core 11, and magnet steel retaining ring 14 is sheathed on outside all magnet steel 12 and magnet steel parting bead 13 and is protected by magnet steel retaining ring 14 and fastened.The rotor core of this structure there is problems in that 1) magnet steel and magnet steel parting bead location difficulty；2) magnet steel and magnet steel parting bead generally use glue to be pasted on the outer surface of iron core, processing difficulties.
The rotor core of the second structure is as shown in Figure 2, it is Stamped steel type rotor core, including multi-disc rotor punching 21, the positioning magnetic steel 22 of a piece of band positioning convex strip 26, multi-disc non-locating magnet steel 23, magnet steel retaining ring 24, a detent 25 it is stamped with on the outer surface of every rotor punching 21, multi-disc rotor punching 21 is superimposed as being integrally formed cylindrical structural, first placement positioning magnet steel 22 on the outer round surface of cylindrical structural, positioning convex strip 26 is made to embed in detent 25, place other non-locating magnet steel 23 again, the most sheathed last magnet steel retaining ring 24, by magnet steel retaining ring 24 stationary positioned magnet steel 22 and non-locating magnet steel 23.The rotor core of this structure there is problems in that 1) there is serious leakage field, adjacent magnet steel partial invalidity between magnet steel；2) owing to generally using Nd-Fe-B magnet steel at present, this magnet steel is expensive, and the most adjacent magnet steel partial invalidity can cause the serious wasting of resources.
Summary of the invention
The technical problem to be solved is to provide a kind of simple in construction, and magnet steel location is simple, the rotor core structure of the magneto that leakage field is few between magnet steel, and the inductance fluctuation using the magneto of this rotor core is little.
The present invention solves the technical scheme that above-mentioned technical problem used: the rotor core structure of a kind of magneto, including multi-disc rotor punching, multi-disc magnet steel and for fixing the magnet steel retaining ring of all described magnet steel, it is characterized in that on the outer round surface of the rotor punching described in part there being and the positioning interval block of the quantity such as described magnet steel uniform integrated punching, all described rotor punchings make the described positioning interval block alignment on axially when being overlapped into one, every described magnet steel is inserted between the positioning interval block that circumferentially-adjacent two are described, described magnet steel retaining ring is sheathed on outside all described magnet steel.
The height of described positioning interval block is 0.8～2mm, and the pole embrace of described positioning interval block is 0.05～0.4, and described positioning interval block is 1～2mm along the axial axial length of described rotor punching；Here, limit the height of positioning interval block, axial length and pole embrace are to ensure that positioning interval block effectively on the premise of positioning magnetic steel, can reduce the external surface area of positioning interval block, with the minimizing impact on motor inductances as far as possible；Generally the height of positioning interval block is the 0.8～2mm effect that just can function well as positioning magnetic steel in radial direction, can be described by the pole embrace of positioning interval block for the spacing between the arc length the most adjacent two panels magnet steel of positioning interval block, the pole embrace typically requiring magnet steel due to rotor core is 0.6～0.95, therefore the pole embrace of positioning interval block can be limited to 0.05～0.4, axial length for positioning interval block, general magnet steel is 20～50mm along the axial length of rotor punching, for ensureing that positioning interval block is in the most effectively positioning magnetic steel, can make positioning interval block the axial length that axial length is magnet steel about 5%, therefore the axial length of positioning interval block can be limited to 1～2mm.
Described positioning interval block has circular groove or rectangular recess along the axially arranged of described rotor punching；Here, axially arranged circular groove or rectangular recess along rotor punching are the external surface areas in order to reduce positioning interval block on positioning interval block, to reduce the impact on motor inductances of the positioning interval block, other shapes of groove can be set when actual design.
Compared with prior art, it is an advantage of the current invention that: by part rotor punching upper punch compression set interdigit spacer block, achieve the location to magnet steel the most simply and easily, decrease leakage field between magnet steel, and simplify the structure of rotor core, simultaneously because of only at part rotor punching upper punch compression set interdigit spacer block, therefore positioning interval block is the least on the impact of motor inductances, and the inductance fluctuation i.e. using the magneto of this rotor core is little；Additionally, due to positioning interval block is integrally formed on rotor punching, therefore magnet steel only need to be inserted between circumferentially-adjacent two positioning interval block and can realize location well, and without making to fasten with glue magnet steel, and the easy course of processing.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing a kind of rotor core；
Fig. 2 is the structural representation of existing another kind of rotor core；
Fig. 3 is the structural representation of the rotor core of the present invention；
Fig. 4 is the structural representation of the rotor punching being stamped with positioning interval block in the rotor core of the present invention；
Fig. 5 is that the rotor punching being stamped with positioning interval block is superimposed as the side view after one with the rotor punching not being stamped with positioning interval block.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
The rotor core structure of a kind of magneto that the present invention proposes, as shown in Figures 3 to 5, it includes multi-disc rotor punching 31, multi-disc magnet steel 32 and for fixing the magnet steel retaining ring 34 of all magnet steel, on the outer round surface of part rotor punching 31, uniform integrated punching has and the positioning interval block 33 of the quantity such as magnet steel, all rotor punchings 31 make the positioning interval block 33 on axially align when being overlapped into one, every magnet steel 32 is inserted between circumferentially-adjacent two positioning interval block 33, and magnet steel retaining ring 34 is sheathed on outside all magnet steel 32.The i.e. rotor punching 31 of this rotor core is divided into the rotor punching of two kinds of different structures, a kind of is the rotor punching (as shown in Figure 4) with positioning interval block, the another kind of rotor punching being not have positioning interval block, both rotor punchings can arbitrarily be superimposed together, but ensure that the positioning interval block of all rotor punchings with positioning interval block aligns in the axial direction, so rotor punching is formed for one or more snippets positioning interval bar after being superimposed as one, i.e. positioning interval block in the axial direction can discontinuously can also be continuous, be used for fixing magnet steel.
Current rotor punching many employings stalloy is made, that is positioning interval block is also to have employed stalloy, and the magnetic conductivity of stalloy is preferable, positioning interval block is caused can the control performance of motor to be had a huge impact, if all punching press positioning interval block on verification experimental verification every rotor punching, form whole piece positioning interval bar, the inductance value fluctuating margin of motor can be made to reach 15～30%, so control performance fluctuation of motor increases the most therewith, and torque characteristics, vibration and noise etc. also can increase therewith.nullConsider this，For reducing the impact on motor inductances of the positioning interval block，Only at the outer round surface upper punch compression set interdigit spacer block of part rotor punching，Actually only need at the outer round surface upper punch compression set interdigit spacer block of a piece of or two panels rotor punching (as shown in Figure 5 when actual design，The rotor punching of positioning interval block can be had to be respectively placed in head end and tail end two panels punching when all rotor punchings are superimposed as one) magnet steel positioning requirements can be met，And decrease the impact on motor inductances of the positioning interval block to greatest extent，The rotor core being stamped with positioning interval block on outer round surface to only two panels rotor punching is tested，Result shows that this rotor core is little to motor inductances fluctuation，Within fluctuating margin can be controlled in 1%，Make inductance fluctuation that the impact of motor performance is reduced to very little degree，So using the control performance of the motor of the rotor core of this structure to stablize，Vibration and noise are the lowest.
In this particular embodiment, in order to ensure that positioning interval block 33 can be effectively on the premise of positioning magnetic steel, reduce the external surface area of positioning interval block 33 as far as possible, to reduce the impact on motor inductances, therefore height, axial length and the pole embrace of positioning interval block 33 is limited, as being 0.8～2mm by the limitation in height of positioning interval block 33, during actual design, the height of positioning interval block 33 can be designed 1.2mm；The pole embrace of positioning interval block 33 is limited to 0.05～0.4, during actual design, the pole embrace of positioning interval block 33 can be designed as 0.2；Positioning interval block 33 is limited to 1～2mm along the axial axial length of rotor punching, during actual design, the axial length of positioning interval block 33 can be designed as 1.5mm；Also a circular groove 35 can be set along the axial centre position of rotor punching 31 at positioning interval block 33, to reduce the positioning interval block 33 impact on motor inductances further.
When specific design, the planform of positioning interval block is not limited only to the structure provided in the present embodiment, can designed, designed.
Claims (3)
1. the rotor core structure of a magneto, including multi-disc rotor punching, multi-disc magnet steel and for fixing the magnet steel retaining ring of all described magnet steel, it is characterized in that on the outer round surface of the rotor punching described in part there being and the positioning interval block of the quantity such as described magnet steel uniform integrated punching, all described rotor punchings make the described positioning interval block alignment on axially when being overlapped into one, every described magnet steel is inserted between the positioning interval block that circumferentially-adjacent two are described, and described magnet steel retaining ring is sheathed on outside all described magnet steel.
The rotor core structure of a kind of magneto the most according to claim 1, the height that it is characterized in that described positioning interval block is 0.8～2mm, the pole embrace of described positioning interval block is 0.05～0.4, and described positioning interval block is 1～2mm along the axial axial length of described rotor punching.
The rotor core structure of a kind of magneto the most according to claim 2, it is characterised in that described positioning interval block has circular groove or rectangular recess along the axially arranged of described rotor punching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410411611.5A CN104218705B (en) | 2014-08-20 | A kind of rotor core structure of magneto |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410411611.5A CN104218705B (en) | 2014-08-20 | A kind of rotor core structure of magneto |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104218705A CN104218705A (en) | 2014-12-17 |
| CN104218705B true CN104218705B (en) | 2017-01-04 |
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