CN109524223B - Voltage regulating method for self-coupling mine transformer complete machine - Google Patents
Voltage regulating method for self-coupling mine transformer complete machine Download PDFInfo
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- CN109524223B CN109524223B CN201811197422.7A CN201811197422A CN109524223B CN 109524223 B CN109524223 B CN 109524223B CN 201811197422 A CN201811197422 A CN 201811197422A CN 109524223 B CN109524223 B CN 109524223B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/02—Auto-transformers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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Abstract
The invention discloses a voltage regulating method of a complete self-coupling mine transformer, which relates to the technical field of transformers and comprises the following steps: step A: firstly, making a three-phase coil into a self-coupling structural form, winding the A-phase coil, and B: winding the B-phase coil, and step C: c-phase coil winding, step D: final assembly and step E: gear adjustment, step E: and (6) regulating the pressure. Compared with the common auto-transformer, the height of the invention is greatly reduced, the cost of the iron core and the oil tank is saved, the no-load loss of the transformer is greatly reduced, the appearance harmony of the auto-transformer is optimized, the impedance voltage of the auto-transformer can be greatly improved, and the short-circuit resistance of the auto-transformer is greatly improved.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a voltage regulating method of a complete self-coupling mine transformer.
Background
The step-up transformer is used for instantly starting voltage, so that the manufacturers of the transformers which can effectively realize instant step-up in China are rare, the instant start step-up capability of the step-up transformer is strong, and the step-up effect is good. The difference lies in that the non-excitation voltage regulating switch does not have the capacity of switching gears with loads, because the tap changer has a short-time disconnection process in the process of switching gears, and the disconnection of load current can cause arcing between contacts to burn out the tap changer or short circuit, so the transformer has to be powered off during gear shifting. And therefore are typically used in transformers where voltage requirements are not very stringent and frequent gear shifting is not required.
Underground mining operating mode is because far away than ground is more, and it is too long to lead to the distribution lines to stretch, and the pressure drop is too big, and the unable normal work of underground consumer urgently needs a step up transformer, can establish ties at the too big terminal of pressure drop, promotes distribution voltage to normal operating condition.
Therefore, it is necessary to provide a voltage regulating method for the whole self-coupling mining transformer to solve the problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a voltage regulating method of a whole self-coupling mining transformer, which solves the problems of too long tension and too large voltage drop of a distribution line caused by a deep and far distance from the ground in underground mining working conditions.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a voltage regulating method of a complete self-coupling mining transformer comprises the following steps:
a: winding an A-phase coil: firstly, a three-phase coil is made into a self-coupling structural form, a single small-specification lead is used for winding 30 turns of a common coil, namely an inner-layer coil, then two large-specification leads are used for winding around a boost coil of '6T +2T + 2T', 10 turns are totally taken, namely an outer-layer coil, output taps a1, a2 and a3 are respectively led out from the '6T +2T + 2T', a white cloth tape is bound with the coil after winding is finished, and the winding of an A-phase coil is finished;
b: winding a B-phase coil: winding a single small-specification lead wire for 30 turns of a common coil, namely an inner-layer coil, then winding a double large-specification lead wire for 10 turns around a boosting coil of '6T +2T + 2T', namely an outer-layer coil, respectively leading out output taps B1, B2 and B3 in the '6T +2T + 2T', binding a white cloth tape with the coil after the winding is finished, and finishing the winding of a phase B coil;
c: c-phase coil winding: winding a single small-specification lead wire for 30 turns of a common coil, namely an inner-layer coil, then winding a double large-specification lead wire around a boosting coil with the number of 6T +2T +2T and the number of 10 turns of the boosting coil, namely an outer-layer coil, respectively leading out output taps C1, C2 and C3 in the number of 6T +2T +2T, binding a white cloth tape with the coil after the winding is finished, and finishing the winding of a phase C coil;
d: final assembly: then after a series of strict processes of sleeving, lead-out wire welding, insulating wrapping, body moisture drying, general assembly and oil injection and the like are carried out, the transformer is stood for 48 hours so as to be convenient for the transformer oil and the dried insulation to be completely soaked;
e: gear adjustment: the transformation ratio is set to be adjustable in three stages of 330V/400-420-440, the rated voltage is 330V when the three-phase input, and the secondary rated voltage is 400V, 420V or 440V and can be freely selected through manual gear shifting;
f: pressure regulation: the output voltage is adjustable, and users can adjust the range by about +/-5% according to the required working voltage.
Optionally, when the input voltage in the step E is 330V, the output voltage is 440V, and the three-phase output port is respectively connected to a1, b1, and c 1.
Optionally, when the input voltage in the step E is 330V, the output voltage is 420V, and the three-phase output port is respectively connected to a2, b2, and c 2.
Optionally, when the input voltage in the step E is 330V, the output voltage is 400V, and the three-phase output port is respectively connected to a3, b3, and c 3.
Optionally, the inner coils in step a, step B and step C are all common coils, and the outer coils in step a, step B and step C are all voltage regulating coils.
Optionally, the inner coils in the step a, the step B and the step C are all AX coils, the outer coils in the step a, the step B and the step C are all BX coils, the winding directions of the AX coils and the BX coils are opposite, the AX coils are in the left winding direction, and the BX coils are in the right winding direction.
Optionally, the lengths of the heads of a1, a2 and a3 in step a are all 100mm, the lengths of the heads of B1, B2 and B3 in step B are all 160mm, and the lengths of the heads of C1, C2 and C3 in step C are all 240 mm.
Optionally, the inner diameter of the inner coil in step a, step B, and step C is 118mm, the outer diameter of the inner coil in step a, step B, and step C is 129mm, the inner diameter of the outer coil in step a, step B, and step C is 141mm, and the outer diameter of the outer coil in step a, step B, and step C is 152 mm.
(III) advantageous effects
The invention provides a voltage regulating method of a whole self-coupling mine transformer, which has the following beneficial effects:
(1) the invention adopts the self-coupling form through the coil structure, 75% of all turns are the common coil, the common coil is because of the common electric path of the primary and secondary side coils, the current in the partial coil is the difference between the primary and secondary side currents, the primary and secondary side currents are relatively close, therefore, the difference is smaller, by utilizing the principle, the booster transformer can save more than 55% of the consumption of copper wires and silicon steel sheets compared with the same capacity distribution transformer, therefore, the total weight is also reduced by about 50%.
(2) The step-up transformer is connected in series at a terminal with overlarge voltage drop, A, B, C phases are connected in series and are connected in series, the installation and the connection are simple and convenient, the step-up transformer is connected in series in a three-phase distribution line to operate, the step-up transformer can reduce the electric quantity loss by more than 62% compared with the same-capacity distribution transformer, the operation efficiency reaches more than 99.5%, and the electric energy loss is very small.
(3) Compared with the common auto-transformer, the height of the invention is greatly reduced, the cost of the iron core and the oil tank is saved, the no-load loss of the transformer is greatly reduced, the appearance harmony of the auto-transformer is optimized, and the impedance voltage of the auto-transformer can be greatly improved, thereby greatly increasing the short-circuit resistance of the auto-transformer.
Drawings
FIG. 1 is a schematic cross-sectional view of a self-coupled coil of the present invention.
FIG. 2 is a top view of the self-coupled coil of the present invention.
FIG. 3 is an electrical schematic diagram of the autotransformer of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a voltage regulating method of a complete self-coupling mine transformer shown in figures 1-3, which comprises the following steps:
a: winding an A-phase coil: firstly, a three-phase coil is made into a self-coupling structural form, a single small-specification lead is used for winding 30 turns of a common coil, namely an inner-layer coil, then two large-specification leads are used for winding around a boost coil (6T +2T + 2T) for 10 turns, namely an outer-layer coil, output taps a1, a2 and a3 are respectively led out from the 6T +2T +2T, a white cloth tape is bound with the coil after winding is finished, so that the mechanical strength of the white cloth tape is increased, and the winding of an A-phase coil is finished;
b: winding a B-phase coil: winding a single small-specification lead wire for 30 turns of a common coil, namely an inner-layer coil, then winding a double large-specification lead wire around a boosting coil with the number of 6T +2T +2T and the number of 10 turns of the boosting coil with the number of 6T +2T +2T, namely an outer-layer coil, respectively leading out output taps B1, B2 and B3 in the 6T +2T +2T, binding a white cloth tape with the coil after the winding is finished so as to increase the mechanical strength of the white cloth tape, and finishing the winding of a phase B coil;
c: c-phase coil winding: winding a single small-specification lead wire for 30 turns of a common coil, namely an inner-layer coil, then winding a double large-specification lead wire around a boosting coil with the number of 6T +2T +2T and the number of 10 turns of the boosting coil, namely an outer-layer coil, respectively leading out output taps C1, C2 and C3 in the 6T +2T +2T, binding a white cloth tape with the coil after the winding is finished so as to increase the mechanical strength of the white cloth tape, and finishing the winding of a C-phase coil;
d: final assembly: then after a series of strict processes of sleeving, lead-out wire welding, insulating wrapping, body moisture drying, general assembly and oil injection and the like are carried out, the transformer is stood for 48 hours so as to be convenient for the transformer oil and the dried insulation to be completely soaked;
e: gear adjustment: the transformation ratio is set to be 330V/400-420-440 three-gear adjustable, the three-phase input rated voltage is 330V, the secondary side rated voltage is 400V, 420V or 440V, and the manual gear shifting can be freely selected, when the input voltage is 330V, the output voltage is 440V, the three-phase output ports are respectively connected with a1, b1 and c1, when the input voltage is 330V, the output voltage is 420V, the three-phase output ports are respectively connected with a2, b2 and c2, when the input voltage is 330V, the output voltage is 400V, and the three-phase output ports are respectively connected with a3, b3 and c 3;
f: pressure regulation: the output voltage is adjustable, and users can adjust the range by about +/-5% according to the required working voltage.
As an optional technical scheme of the invention:
the inner coils in the step A, the step B and the step C are all common coils, and the outer coils in the step A, the step B and the step C are all voltage regulating coils.
As an optional technical scheme of the invention:
the inner coils in the step A, the step B and the step C are all AX coils, the outer coils in the step A, the step B and the step C are all BX coils, the winding directions of the AX coils and the BX coils are opposite, the AX coils are in the left winding direction, and the BX coils are in the right winding direction.
As an optional technical scheme of the invention:
the head lengths of a1, a2 and a3 in step A are all 100mm, the head lengths of B1, B2 and B3 in step B are all 160mm, and the head lengths of C1, C2 and C3 in step C are all 240 mm.
As an optional technical scheme of the invention:
the inner diameter of the inner coil in the steps A, B and C is 118mm, the outer diameter of the inner coil in the steps A, B and C is 129mm, the inner diameter of the outer coil in the steps A, B and C is 141mm, and the outer diameter of the outer coil in the steps A, B and C is 152 mm.
It is noted that in the present disclosure, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacted with the first and second features, or indirectly contacted with the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. A voltage regulating method of a complete self-coupling mining transformer is characterized by comprising the following steps:
a: winding an A-phase coil: firstly, a three-phase coil is made into a self-coupling structural form, a single small-specification lead is used for winding 30 turns of a common coil, namely an inner-layer coil, then two large-specification leads are used for winding around a boost coil of '6T +2T + 2T', 10 turns are totally taken, namely an outer-layer coil, output taps a1, a2 and a3 are respectively led out from the '6T +2T + 2T', a white cloth tape is bound with the coil after winding is finished, and the winding of an A-phase coil is finished;
b: winding a B-phase coil: winding a single small-specification lead wire for 30 turns of a common coil, namely an inner-layer coil, then winding a double large-specification lead wire for 10 turns around a boosting coil of '6T +2T + 2T', namely an outer-layer coil, respectively leading out output taps B1, B2 and B3 in the '6T +2T + 2T', binding a white cloth tape with the coil after the winding is finished, and finishing the winding of a phase B coil;
c: c-phase coil winding: winding a single small-specification lead wire for 30 turns of a common coil, namely an inner-layer coil, then winding a double large-specification lead wire around a boosting coil with the number of 6T +2T +2T and the number of 10 turns of the boosting coil, namely an outer-layer coil, respectively leading out output taps C1, C2 and C3 in the number of 6T +2T +2T, binding a white cloth tape with the coil after the winding is finished, and finishing the winding of a phase C coil;
d: final assembly: then after a series of strict processes of sleeving, lead-out wire welding, insulating wrapping, body moisture drying, general assembly and oil injection are carried out, the transformer is statically placed for 48 hours so as to facilitate the transformer oil and the dried insulation to be completely soaked;
e: gear adjustment: the transformation ratio is set to be adjustable in three stages of 330V/400-420-440, the rated voltage is 330V when the three-phase input, and the secondary rated voltage is 400V, 420V or 440V and can be freely selected through manual gear shifting;
f: pressure regulation: the output voltage is adjustable, and a user can adjust the range by about +/-5% according to the required working voltage;
the inner coils in the step A, the step B and the step C are all common coils, and the outer coils in the step A, the step B and the step C are all voltage regulating coils;
the inner coils in the step A, the step B and the step C are all AX coils, the outer coils in the step A, the step B and the step C are all BX coils, the winding directions of the AX coils and the BX coils are opposite, the AX coils are in the left winding direction, and the BX coils are in the right winding direction.
2. The voltage regulating method of the whole self-coupling mining transformer of claim 1, characterized in that: when the input voltage in the step E is 330V, the output voltage is 440V, and the three-phase output ports are respectively connected to a1, b1 and c 1.
3. The voltage regulating method of the whole self-coupling mining transformer of claim 1, characterized in that: when the input voltage in the step E is 330V, the output voltage is 420V, and the three-phase output port is respectively connected to a2, b2 and c 2.
4. The voltage regulating method of the whole self-coupling mining transformer of claim 1, characterized in that: when the input voltage in the step E is 330V, the output voltage is 400V, and the three-phase output port is respectively connected to a3, b3 and c 3.
5. The voltage regulating method of the whole self-coupling mining transformer of claim 1, characterized in that: the head lengths of a1, a2 and a3 in the step A are all 100mm, the head lengths of B1, B2 and B3 in the step B are all 160mm, and the head lengths of C1, C2 and C3 in the step C are all 240 mm.
6. The voltage regulating method of the whole self-coupling mining transformer of claim 1, characterized in that: the inner diameter of the inner coil in the steps A, B and C is 118mm, the outer diameter of the inner coil in the steps A, B and C is 129mm, the inner diameter of the outer coil in the steps A, B and C is 141mm, and the outer diameter of the outer coil in the steps A, B and C is 152 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811197422.7A CN109524223B (en) | 2018-10-15 | 2018-10-15 | Voltage regulating method for self-coupling mine transformer complete machine |
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| CN201811197422.7A CN109524223B (en) | 2018-10-15 | 2018-10-15 | Voltage regulating method for self-coupling mine transformer complete machine |
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| CN109524223B true CN109524223B (en) | 2022-02-18 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87208303U (en) * | 1987-05-20 | 1988-07-13 | 李振山 | Auto-coupling voltage regulator |
| CN2166508Y (en) * | 1993-08-21 | 1994-05-25 | 朱跃钢 | 10/6KV autotransformer |
| CN2458704Y (en) * | 2001-01-18 | 2001-11-07 | 李钢 | Step-up transformer for mine |
| CN201332008Y (en) * | 2009-01-12 | 2009-10-21 | 哈尔滨共乐电力科技发展有限公司 | Amorphous alloy on-load variac |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL215674A (en) * | 1957-03-23 | |||
| FR1377430A (en) * | 1963-09-19 | 1964-11-06 | Materiel Electrique S W Le | Autotransformers with regulating windings |
| US3474326A (en) * | 1967-01-27 | 1969-10-21 | Gen Electric | Tap changing apparatus for inductive windings |
| JPS59204222A (en) * | 1983-05-09 | 1984-11-19 | Toshiba Corp | Tapped auto-transformer |
| JPS61187211A (en) * | 1985-02-14 | 1986-08-20 | Hitachi Ltd | Winding of transformer |
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2018
- 2018-10-15 CN CN201811197422.7A patent/CN109524223B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87208303U (en) * | 1987-05-20 | 1988-07-13 | 李振山 | Auto-coupling voltage regulator |
| CN2166508Y (en) * | 1993-08-21 | 1994-05-25 | 朱跃钢 | 10/6KV autotransformer |
| CN2458704Y (en) * | 2001-01-18 | 2001-11-07 | 李钢 | Step-up transformer for mine |
| CN201332008Y (en) * | 2009-01-12 | 2009-10-21 | 哈尔滨共乐电力科技发展有限公司 | Amorphous alloy on-load variac |
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