CN102938297A - Low-noise amorphous alloy transformer iron core - Google Patents
Low-noise amorphous alloy transformer iron core Download PDFInfo
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- CN102938297A CN102938297A CN2011102335843A CN201110233584A CN102938297A CN 102938297 A CN102938297 A CN 102938297A CN 2011102335843 A CN2011102335843 A CN 2011102335843A CN 201110233584 A CN201110233584 A CN 201110233584A CN 102938297 A CN102938297 A CN 102938297A
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Abstract
The invention discloses a low-noise amorphous alloy transformer iron core which comprises an inner side wrapping sheet, an outer side wrapping sheet, an amorphous alloy core and deadening felts. The amorphous alloy core is arranged between the inner side wrapping sheet and the outer side wrapping sheet, and the deadening felts are arranged on non-touch surfaces of the inner side wrapping sheet, the outer side wrapping sheet and the amorphous alloy core. The deadening felts are arranged on the inner side surface and the outer side surface of the amorphous alloy transformer iron core, so that noise transmission routes of the amorphous alloy iron core can be effectively isolated, and the low-noise amorphous alloy transformer iron core is simple in process, convenient to operate, low in cost and remarkable in noise reduction effect.
Description
Technical field
The present invention relates to the transformer technology field, particularly relate to a kind of low-noise amorphous alloy transformer iron core.
Background technology
Transformer is to utilize the principle of electromagnetic induction to transmit the device of electric energy, and a simple single-phase transformer is comprised of two electric conductors and iron core.When one of them electric conductor has the electric current (as alternating current) of non-quantitative to pass through, just the magnetic field that can change, according to electromagnetic induction principle, the magnetic field of variation just can make second electric conductor produce electrical potential difference; If second electric conductor is the part of closed circuit, just this closed circuit can generation current so, electric energy is transmitted.The magnetic field produced due to coil is far longer than a straight wire, therefore the coil that electric conductor often for example, is wound in by wire (copper wires) forms, two electric conductors are referred to as primary coil and secondary coil.
Desirable transformer does not have energy loss, and efficiency is 100%; And, among reality, desirable transformer is non-existent, its energy loss is mainly from following phenomenon:
Copper loss: wire all exists resistance, when electric current flows through, will inevitably consume certain power, and this part loss is often with the form consumption of heat energy, and because wire at present is generally copper wires, therefore this part loss is called to copper loss.
Iron loss (eddy current damage): have the magnetic line of force to pass in iron core, on the plane vertical with the magnetic line of force, will produce induced current, form circulation because this electric current has closed-loop path of one's own, and become swirl shape, therefore be called eddy current.The existence of eddy current makes the iron core heating, consumed energy, and this loss is called iron loss or eddy current damages.Iron core is cut into to the thin slice do not communicated and can reduces this loss.
Magnetic force runs off: all magnetic lines of force that do not received by secondary coil all can cause the loss of energy, are referred to as magnetic force and run off.
Magnetic hysteresis is damaged: the hysteresis of iron core all causes energy to run off while making each magnetic field change, and is referred to as magnetic hysteresis and damages.The size of this loss depends on the material of iron core.
Power runs off: the magnetic field replaced changes wire, iron core and the magnetic field between near metal, and result forms vibration and energy loss.
Magnetostriction: it is flexible that iron core appears in the magnetic field replaced.If the material of iron core easily is subject to flexible the impact, the friction between molecule can cause energy to run off.
From top description, can find out, core material is very crucial on the impact of transformer efficiency.Traditional transformer is used the materials such as permalloy, ferrite and silicon steel sheet to make iron core, yet its efficiency is unsatisfactory.Along with the progress of technology, non-crystaline amorphous metal becomes silicon steel, permalloy and ferritic regeneration product, will develop into gradually the main flow material of transformer core.
Non-crystaline amorphous metal is the new material that utilizes flash set technology to manufacture, there is excellent soft magnet performance, at present multiplex in distribution transformer as transformer magnetic conduction magnetic circuit, it is compared and more is conducive to be magnetized and degaussing with silicon steel, thereby has good excitation property and iron loss characteristic.Amorphous alloy transformer is compared no-load loss 80% left and right, no-load current 50% left and right that descends that descends with existing S9 serial transformer, and energy-saving effect is remarkable.
Then, non-crystaline amorphous metal is intrinsic due to itself, it is applied and also have certain technical bottleneck.For example, the magnetostriction coefficient of non-crystaline amorphous metal is higher by approximately 10% than silicon steel sheet, and it is smaller that the amorphous iron core caused by magnetostriction vibrates suffered constraint, and vibration level is relatively large, the noise of corresponding generation is also larger, and how reducing the amorphous alloy transformer noise is also the major issue that must consider.In addition, non-crystaline amorphous metal is very responsive to mechanical stress, is that tensile stress or bending stress all can affect its magnetic property, therefore, should consider to reduce iron core stressed when the fabrication design iron core as far as possible; Very crisp after non-crystaline amorphous metal annealing, easily produce chip, puncture transformer coil and produce short trouble.
Therefore, in amorphous alloy iron core manufacturing process, also should adopt certain measure, to solve the noise problem of existing amorphous alloy transformer.
Summary of the invention
The object of the present invention is to provide a kind of low-noise amorphous alloy transformer iron core, to solve the noise problem of existing amorphous alloy transformer.
For solving above technical problem, the invention provides a kind of low-noise amorphous alloy transformer iron core, comprise interior side wrapping, outer side wrapping and be arranged at the non-crystaline amorphous metal core body between the wrap sheet of medial and lateral, it also comprises: deadening felt is arranged on interior side wrapping, outer side wrapping and the discontiguous surface of non-crystaline amorphous metal core body.
Further, the thickness of described deadening felt is 0.5～2mm.
Further, the thickness of described deadening felt is 1～1.5mm.
Further, described deadening felt and the discontiguous surface of medial and lateral wrap sheet are flexible wool spinning material.
Further, described deadening felt is bonded on the wrap sheet of medial and lateral by the glue that sticks to the deadening felt back side.
Further, described medial and lateral wrap sheet is silicon steel sheet.
Further, described non-crystaline amorphous metal core body comprises a plurality of non-crystaline amorphous metal stack of laminations, and the non-crystaline amorphous metal lamination two overlap joint in described non-crystaline amorphous metal stack of laminations is closed, form joining seam, and the joining seam of described non-crystaline amorphous metal stack of laminations is positioned at the same side of non-crystaline amorphous metal core body.
Further, described deadening felt two ends overlap joint is closed, and the joining seam of the overlap of described deadening felt and non-crystaline amorphous metal lamination is positioned at the same side of non-crystaline amorphous metal core body.
The zone of removing the joining seam place on the surface that further, described non-crystaline amorphous metal core body does not contact with the medial and lateral wrap sheet is coated with adhesive.
Further, described adhesive is two component epoxy glue.
Further, is furnished with flexibilizer in described adhesive.
Further, the thickness of described adhesive is 1～2mm.
Visible, above amorphous alloy transformer core all is provided with deadening felt on inner surface and outer surface, can effectively completely cut off the noise transmission paths of amorphous alloy iron core, has significantly reduced the noise of amorphous alloy iron core, technique is simple, easy to operate, with low cost, and noise reduction is remarkable.
The accompanying drawing explanation
The structural representation of the amorphous alloy transformer core that Fig. 1 provides for one embodiment of the invention;
The end view of the amorphous alloy transformer core that Fig. 2 provides for one embodiment of the invention.
Embodiment
For above-mentioned feature and advantage of the present invention can be become apparent, exemplary embodiment cited below particularly, and coordinate accompanying drawing, be described in detail below.
The magnetostriction coefficient of considering non-crystaline amorphous metal is higher, and the amorphous iron core caused by magnetostriction vibrates that suffered constraint is smaller, and vibration level is relatively large, and the noise of corresponding generation is also larger.In order to reduce noise, the present invention is provided with deadening felt at amorphous alloy iron core inner surface and outer surface, with the route of transmission of effectively isolated noise, has significantly reduced the noise of amorphous alloy iron core.
Specifically, please refer to Fig. 1, the structural representation of the amorphous alloy transformer core that it provides for one embodiment of the invention.As shown in the figure, this iron core comprises interior side wrapping 3, outer side wrapping 4 and is arranged at the non-crystaline amorphous metal core body 1 between the wrap sheet of medial and lateral, and be provided with deadening felt 2 on interior side wrapping 3, outer side wrapping 4 and the discontiguous surface of non-crystaline amorphous metal core body 1, deadening felt one side is stained with glue, for pasting wrap sheet, opposite side is the wool spinning material, and material is bulk, is conducive to isolated noise transmission paths.Visible, covered deadening felt 2 on the interior outer surface of whole amorphous alloy iron core, so can effectively completely cut off the noise transmission approach of amorphous alloy iron core.In addition, this mode technique is simple, easy to operate, with low cost, and noise reduction is remarkable.
Usually, the non-crystaline amorphous metal core body obtains stack of laminations by amorphous alloy strips through cutting and forms.Concrete non-crystaline amorphous metal core body can consist of a plurality of non-crystaline amorphous metal stack of laminations, non-crystaline amorphous metal lamination two overlap joint in each non-crystaline amorphous metal stack of laminations is closed, as shown in Figure 1, thereby form joining seam 5, and all joining seams 5 all are positioned at the same side of non-crystaline amorphous metal core body, so that open iron core suit transformer coil.It should be noted that, the present invention does not limit quantity and the length of non-crystaline amorphous metal stack of laminations, does not consider the variation of the outer rim length that causes of stack, in every group the length of non-crystaline amorphous metal lamination can be identical can be not identical yet, and then the joining seam formed can superpose, also can be stepped.
Usually, deadening felt 2 is bonded in interior side wrapping 3 and outer side wrapping 4 surfaces by the glue that sticks to the deadening felt back side.The side that deadening felt 2 has a joining seam 5 at the non-crystaline amorphous metal core body has to be stacked with mutually and connects part, facilitates amorphous alloy iron core to open rear suit transformer coil.
Interior side wrapping 3 is in order to support the non-crystaline amorphous metal lamination, to reduce the difficulty of amorphous iron core forming with the introducing of outer side wrapping 4.Preferably, interior side wrapping 3 is silicon steel sheet with outer side wrapping 4, to utilize silicon steel and amorphous alloy strips, has similar electromagnetic performance, the magnetic conduction effect while participating in the transformer operation.
Please continue to refer to Fig. 1, preferably, the zone of removing joining seam 5 places on the surface that non-crystaline amorphous metal core body 1 does not contact with 4 with medial and lateral wrap sheet 3 is coated with adhesive 6.This adhesive is two component epoxy glue preferably, is furnished with flexibilizer simultaneously, to avoid the epoxy surface, embrittlement occurs.The thickness of adhesive 6 is 1～2mm, under the prerequisite of not obvious increase amorphous iron core size, can effectively to amorphous band, be coated with envelope.Flexible after adhesive solidification, heat resistance is good, on the iron core surface, does not produce stress, is conducive to reduce the noise of amorphous iron core, avoids amorphous fragment chip to separate out.
As shown in Figure 2, d is of a size of the width of amorphous alloy strips, d
1For the gauge of adhesive 6, d
2Width for deadening felt 2.Deadening felt 2 is d+2d at the width of adhesive 6 coating zones
1, at the width of amorphous iron core joining seam 5 parts and amorphous alloy strips d with wide.The thickness of deadening felt is 0.5～2mm, and optimal thickness is 1～1.5mm, guarantees under the prerequisite that does not increase the iron core physical size route of transmission of effectively isolated amorphous alloy iron core noise.Deadening felt one side surface is glue, for being bonded in medial and lateral wrap sheet 3 and 4, the opposite side surface is flexible wool spinning material, there is certain pliable and tough compressibility, therefore can not increase the size of amorphous iron core, do not affect the assembling of transformer coil, but can effectively completely cut off the route of transmission of amorphous iron core noise, the operation noise of transformer is significantly reduced, can reach below 45dB, be better than the requirement of national standard.
In sum, the amorphous alloy transformer core of above embodiment all is provided with deadening felt on inner surface and outer surface, can effectively completely cut off the noise transmission paths of amorphous alloy iron core, significantly reduced the noise of amorphous alloy iron core, technique is simple, easy to operate, with low cost, and noise reduction is remarkable.
Above demonstration and described basic principle of the present invention, principal character and advantage of the present invention.Those skilled in the art should understand; the present invention is not restricted to the described embodiments; what in above-described embodiment and specification, describe is principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in claimed scope of the present invention.The protection range that the present invention requires is defined by appending claims and equivalent thereof.
Claims (12)
1. a low-noise amorphous alloy transformer iron core, comprise interior side wrapping, outer side wrapping and be arranged at the non-crystaline amorphous metal core body between the wrap sheet of medial and lateral, and it is characterized in that, this amorphous alloy transformer core also comprises:
Deadening felt, be arranged on interior side wrapping, outer side wrapping and the discontiguous surface of non-crystaline amorphous metal core body.
2. low-noise amorphous alloy transformer iron core according to claim 1, is characterized in that, the thickness of described deadening felt is 0.5～2mm.
3. low-noise amorphous alloy transformer iron core according to claim 2, is characterized in that, the thickness of described deadening felt is 1～1.5mm.
4. low-noise amorphous alloy transformer iron core according to claim 1, is characterized in that, described deadening felt and the discontiguous surface of medial and lateral wrap sheet are flexible wool spinning material.
5. low-noise amorphous alloy transformer iron core according to claim 1, is characterized in that, described deadening felt is bonded on the wrap sheet of medial and lateral by the glue that sticks to the deadening felt back side.
6. low-noise amorphous alloy transformer iron core according to claim 1, is characterized in that, described medial and lateral wrap sheet is silicon steel sheet.
7. low-noise amorphous alloy transformer iron core according to claim 1, it is characterized in that, described non-crystaline amorphous metal core body comprises a plurality of non-crystaline amorphous metal stack of laminations, non-crystaline amorphous metal lamination two overlap joint in described non-crystaline amorphous metal stack of laminations is closed, form joining seam, and the joining seam of described non-crystaline amorphous metal stack of laminations is positioned at the same side of non-crystaline amorphous metal core body.
8. low-noise amorphous alloy transformer iron core according to claim 7, is characterized in that, described deadening felt two ends overlap joint is closed, and the joining seam of the overlap of described deadening felt and non-crystaline amorphous metal lamination is positioned at the same side of non-crystaline amorphous metal core body.
9. low-noise amorphous alloy transformer iron core according to claim 7, is characterized in that, the zone of removing the joining seam place on the surface that described non-crystaline amorphous metal core body does not contact with the medial and lateral wrap sheet is coated with adhesive.
10. low-noise amorphous alloy transformer iron core according to claim 9, is characterized in that, described adhesive is two component epoxy glue.
11. low-noise amorphous alloy transformer iron core according to claim 9, is characterized in that, in described adhesive, is furnished with flexibilizer.
12. low-noise amorphous alloy transformer iron core according to claim 9, is characterized in that, the thickness of described adhesive is 1～2mm.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426622A (en) * | 2013-08-05 | 2013-12-04 | 大同(上海)有限公司 | Amorphous iron core universal type moving die |
| CN103531334A (en) * | 2013-11-02 | 2014-01-22 | 国家电网公司 | Silicon steel sheet surrounding type amorphous alloy iron cores |
| CN106601440A (en) * | 2016-12-09 | 2017-04-26 | 江苏扬动电气有限公司 | Amorphous iron core structure externally coated with dual-layer silicon steel sheets |
| CN106611650A (en) * | 2015-10-23 | 2017-05-03 | 上海置信电气非晶有限公司 | Assembly technology of noise-reduction type amorphous alloy core |
| CN109256268A (en) * | 2018-11-02 | 2019-01-22 | 无锡希恩电气有限公司 | A kind of transformer core that can reduce noise |
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| JP2000124044A (en) * | 1998-10-14 | 2000-04-28 | Hitachi Ltd | Low-noise transformer |
| CN201112060Y (en) * | 2007-11-02 | 2008-09-10 | 中电电气集团有限公司 | Amorphous alloy transformer |
| CN101471169A (en) * | 2007-12-26 | 2009-07-01 | 大同股份有限公司 | Improved structure of amorphous iron core |
| CN101740203A (en) * | 2010-01-08 | 2010-06-16 | 中电电气集团有限公司 | Amorphous alloy transformer core and manufacturing method thereof |
| CN202205548U (en) * | 2011-08-15 | 2012-04-25 | 上海日港置信非晶体金属有限公司 | Low-noise amorphous alloy transformer iron core |
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2011
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Patent Citations (5)
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| JP2000124044A (en) * | 1998-10-14 | 2000-04-28 | Hitachi Ltd | Low-noise transformer |
| CN201112060Y (en) * | 2007-11-02 | 2008-09-10 | 中电电气集团有限公司 | Amorphous alloy transformer |
| CN101471169A (en) * | 2007-12-26 | 2009-07-01 | 大同股份有限公司 | Improved structure of amorphous iron core |
| CN101740203A (en) * | 2010-01-08 | 2010-06-16 | 中电电气集团有限公司 | Amorphous alloy transformer core and manufacturing method thereof |
| CN202205548U (en) * | 2011-08-15 | 2012-04-25 | 上海日港置信非晶体金属有限公司 | Low-noise amorphous alloy transformer iron core |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426622A (en) * | 2013-08-05 | 2013-12-04 | 大同(上海)有限公司 | Amorphous iron core universal type moving die |
| CN103426622B (en) * | 2013-08-05 | 2016-01-06 | 大同(上海)有限公司 | The universal flexible mould of amorphous iron core |
| CN103531334A (en) * | 2013-11-02 | 2014-01-22 | 国家电网公司 | Silicon steel sheet surrounding type amorphous alloy iron cores |
| CN106611650A (en) * | 2015-10-23 | 2017-05-03 | 上海置信电气非晶有限公司 | Assembly technology of noise-reduction type amorphous alloy core |
| CN106601440A (en) * | 2016-12-09 | 2017-04-26 | 江苏扬动电气有限公司 | Amorphous iron core structure externally coated with dual-layer silicon steel sheets |
| CN109256268A (en) * | 2018-11-02 | 2019-01-22 | 无锡希恩电气有限公司 | A kind of transformer core that can reduce noise |
| CN109256268B (en) * | 2018-11-02 | 2024-06-11 | 无锡希恩电气有限公司 | Transformer core capable of reducing noise |
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Application publication date: 20130220 |