CN214588403U - Winding end shielding structure of frequency converter phase-shifting rectifier transformer - Google Patents
Winding end shielding structure of frequency converter phase-shifting rectifier transformer Download PDFInfo
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- CN214588403U CN214588403U CN202121078860.9U CN202121078860U CN214588403U CN 214588403 U CN214588403 U CN 214588403U CN 202121078860 U CN202121078860 U CN 202121078860U CN 214588403 U CN214588403 U CN 214588403U
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Abstract
The utility model provides a winding end shielding structure of a frequency converter phase-shifting rectifier transformer, which comprises an iron core, a high-voltage winding and a low-voltage winding, wherein the high-voltage winding and the low-voltage winding are sleeved on the iron core; the high voltage windings are on the inside and the low voltage windings are on the outside, each high voltage winding corresponding to a plurality of phase shifted angular low voltage windings. The magnetic shielding ring is arranged at the upper end part of each low-voltage winding and is made by stacking high-permeability silicon steel sheets into a ring shape, the inner diameter and the outer diameter of the magnetic shielding ring are consistent with those of the low-voltage winding, epoxy resin is poured outside the magnetic shielding ring, and high-density insulating paper is wrapped on the outer layer of the magnetic shielding ring. The magnetic shielding ring is arranged at the end part of the low-voltage winding, so that the local overheating of the winding caused by the transverse magnetic flux leakage can be reduced, and the operational reliability of the frequency converter phase-shifting rectifier transformer is enhanced.
Description
Technical Field
The utility model relates to a transformer technical field, in particular to converter phase shift rectifier transformer's winding head shielding structure.
Background
The high-voltage side winding of the transformer of the frequency converter phase-shifting rectifier transformer is divided into three parts, each high-voltage winding corresponds to a plurality of low-voltage windings with phase-shifting angles, and the following technical problems exist in the aspects of operation safety and reliability of the frequency converter phase-shifting rectifier transformer: in order to solve the influence generated by the transverse leakage flux, the distance between the low-voltage windings is reduced as far as possible on the premise of ensuring the electrical strength, but the influence generated by the transverse leakage flux and the local overheating of the windings caused by the transverse leakage flux cannot be completely solved.
Disclosure of Invention
In order to solve the technical problem that the background art provided, the utility model provides a converter phase-shifting rectifier transformer's winding end shielding structure sets up the magnetic screen ring at low voltage winding end, can reduce the local overheat of winding that horizontal magnetic leakage leads to, has strengthened this converter phase-shifting rectifier transformer's operational reliability.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a winding end shielding structure of a frequency converter phase-shifting rectifier transformer comprises an iron core, a high-voltage winding and a low-voltage winding, wherein the high-voltage winding and the low-voltage winding are sleeved on the iron core; the high voltage windings are on the inside and the low voltage windings are on the outside, each high voltage winding corresponding to a plurality of phase shifted angular low voltage windings.
The magnetic shielding ring is arranged at the upper end part of each low-voltage winding and is made by stacking high-permeability silicon steel sheets into a ring shape, the inner diameter and the outer diameter of the magnetic shielding ring are consistent with those of the low-voltage winding, epoxy resin is poured outside the magnetic shielding ring, and high-density insulating paper is wrapped on the outer layer of the magnetic shielding ring.
Furthermore, one side of the magnetic shielding ring is provided with a hole, a lead point is welded, an external lead cable is connected to the lead point, and the external lead cable and the low-voltage winding lead-out end are welded and combined to be led out.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the magnetic shielding ring for shielding the end part of the low-voltage winding can reduce local overheating of the winding caused by transverse magnetic leakage; the operation reliability of the transformer is enhanced;
2) epoxy resin is poured outside the magnetic shielding ring, and high-density insulating paper is wrapped on the outer layer of the magnetic shielding ring to ensure the insulating strength of the magnetic shielding ring;
3) the magnetic shielding ring is connected with an external lead cable at a lead point, and is welded with the outlet end of the low-voltage winding to be combined to be an outlet wire, so that the magnetic shielding ring and the low-voltage winding are ensured to be at the same point position.
Drawings
FIG. 1 is a layout diagram of a low-voltage winding end shielding structure of a frequency converter phase-shifting rectifier transformer of the present invention;
fig. 2 is a shielding structure diagram of the low voltage winding end of the present invention;
fig. 3 is a cross-sectional view of the low-voltage winding end shielding structure of the present invention;
in the figure: 1-iron core 2-high voltage winding 3-low voltage winding 31-low voltage winding end shielding 311-magnetic shielding ring 312-epoxy resin 313-high density insulating paper 314-lead point.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1-3, a high-reliability frequency converter phase-shifting rectifier transformer comprises an iron core 1, and a high-voltage winding 2 and a low-voltage winding 3 sleeved on the iron core 1; the high-voltage windings 2 are arranged on the inner side, the low-voltage windings 3 are arranged on the outer side, and each high-voltage winding 2 corresponds to a plurality of low-voltage windings 3 with phase-shifting angles.
The low-voltage winding end shield 31 is a magnetic shielding ring 311 arranged at the upper end of each low-voltage winding, the magnetic shielding ring 311 is made of high-permeability silicon steel sheets in a laminated mode and is in a circular ring shape, the inner diameter and the outer diameter of the magnetic shielding ring 311 are consistent with those of the low-voltage winding 3, epoxy resin 312 is poured outside the magnetic shielding ring, and meanwhile, high-density insulating paper 313 with the thickness of 2mm wraps the outer layer of the magnetic shielding ring 311 to ensure the insulating strength of the magnetic shielding ring.
One side of the magnetic shielding ring 311 is provided with a hole, a lead point 314 is welded, an external lead cable is connected to the lead point 314, the external lead cable and the outlet end of the low-voltage winding 3 are welded and combined to be an outlet, and the same point position of the magnetic shielding ring and the low-voltage winding is ensured.
The low-voltage winding end shield 31 can reduce local overheating of the winding caused by transverse magnetic flux leakage, and the operation reliability of the variable-frequency rectifier transformer is improved.
The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation and specific operation processes are given, but the protection scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (2)
1. A winding end shielding structure of a frequency converter phase-shifting rectifier transformer comprises an iron core, a high-voltage winding and a low-voltage winding, wherein the high-voltage winding and the low-voltage winding are sleeved on the iron core; the high-voltage windings are arranged on the inner side and the low-voltage windings are arranged on the outer side, and each high-voltage winding corresponds to a plurality of low-voltage windings with phase-shifting angles;
the magnetic shielding ring is formed by laminating high-permeability silicon steel sheets into a ring shape, the inner diameter and the outer diameter of the magnetic shielding ring are consistent with those of the low-voltage winding, epoxy resin is poured outside the magnetic shielding ring, and high-density insulating paper is wrapped on the outer layer of the magnetic shielding ring.
2. The winding end shielding structure of the frequency converter phase-shifting rectifier transformer according to claim 1, wherein one side of the magnetic shielding ring is provided with a hole, a lead point is welded, an external lead cable is connected to the lead point, and the external lead cable and the low-voltage winding outlet end are welded and combined to be an outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121078860.9U CN214588403U (en) | 2021-05-19 | 2021-05-19 | Winding end shielding structure of frequency converter phase-shifting rectifier transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121078860.9U CN214588403U (en) | 2021-05-19 | 2021-05-19 | Winding end shielding structure of frequency converter phase-shifting rectifier transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214588403U true CN214588403U (en) | 2021-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121078860.9U Active CN214588403U (en) | 2021-05-19 | 2021-05-19 | Winding end shielding structure of frequency converter phase-shifting rectifier transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214588403U (en) |
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2021
- 2021-05-19 CN CN202121078860.9U patent/CN214588403U/en active Active
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