CN213815787U - Step-up transformer for power supply of polycrystalline silicon reduction furnace - Google Patents
Step-up transformer for power supply of polycrystalline silicon reduction furnace Download PDFInfo
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- CN213815787U CN213815787U CN202121397947.2U CN202121397947U CN213815787U CN 213815787 U CN213815787 U CN 213815787U CN 202121397947 U CN202121397947 U CN 202121397947U CN 213815787 U CN213815787 U CN 213815787U
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- 229910021420 polycrystalline silicon Inorganic materials 0.000 title claims abstract description 20
- 230000009467 reduction Effects 0.000 title claims abstract description 19
- 238000004804 winding Methods 0.000 claims abstract description 174
- 238000001514 detection method Methods 0.000 claims abstract description 34
- 230000004907 flux Effects 0.000 claims abstract description 4
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 abstract description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 12
- 238000010586 diagram Methods 0.000 description 7
- 230000005284 excitation Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a boosting transformer for a power supply of a polycrystalline silicon reduction furnace, which comprises a primary winding, a detection coil, a magnetic core and a plurality of secondary windings, wherein the magnetic core comprises two magnetic core columns; the primary winding is wound on the outer side of one magnetic core column or wound on the outer sides of two magnetic core columns in series; the secondary windings are wound on the outer sides of the two magnetic core columns or wound on the outer side of the primary winding; the detection coil is wound on the outer side of one magnetic core column or wound on the outer sides of two magnetic core columns in series, and is positioned between the primary winding and the magnetic core columns or between the primary winding and the secondary winding. The voltage of each turn of the primary winding or/and the secondary winding ranges from 8.5V to 10V; the magnetic flux density B of the magnetic core of the boosting transformer ranges from 0.8T to 1.3T. The utility model discloses can accurate detection step up transformer secondary output voltage to can avoid the saturated and unloaded problem that overflows of step up transformer magnetic core.
Description
Technical Field
The utility model relates to the technical field of transformers, in particular to a step up transformer for polycrystalline silicon reduction furnace power.
Background
In the process of preparing polysilicon by the siemens improvement method, a thyristor is generally adopted for regulating voltage, then a booster transformer outputs high voltage to puncture a silicon core, and then the thyristor is used for regulating voltage and the booster transformer outputs voltages with a plurality of voltage levels to continuously heat the silicon core, which can be seen in a schematic circuit diagram shown in fig. 1. Because the voltage regulated by the thyristor is a non-sinusoidal wave, and the resistance value of the silicon core changes and the impedance angle of the step-up transformer changes, the secondary output voltage of the step-up transformer and the primary input voltage of the step-up transformer are not in a linear proportional relationship, so that accurate detection of the secondary output voltage of the step-up transformer is difficult to meet if a traditional primary voltage detection mode of the transformer is still adopted. In addition, because the resistance value of the step-up transformer before the silicon core is broken down is infinite, the resistance value can be changed rapidly when the silicon core is broken down, so that the step-up transformer has direct current magnetic bias, and the step-up transformer magnetic core is saturated and has no-load overcurrent.
In the prior art, in order to accurately detect the secondary output voltage of the step-up transformer, a voltage transformer is generally arranged on a secondary line, and voltage detection is implemented after high voltage fast melting is connected in series on a transformer detection loop; in order to solve the problem of no-load overcurrent of the step-up transformer, a large power resistor is generally connected in parallel on the primary side. However, the methods have the defects of more devices, high cost, large heating of high-power resistors and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve two problems, first accurate detection step up transformer secondary output voltage, the second avoids the saturated and unloaded problem that overflows of step up transformer magnetic core, provides a step up transformer for polycrystalline silicon reduction furnace power.
In order to realize the purpose of the utility model, the embodiment of the utility model provides a following technical scheme:
a boosting transformer for a power supply of a polycrystalline silicon reduction furnace comprises a primary winding, a detection coil, a magnetic core and a plurality of secondary windings, wherein the magnetic core comprises two magnetic core columns; wherein,
the primary winding is wound on the outer side of one magnetic core column or wound on the outer sides of two magnetic core columns in series; the secondary windings are wound on the outer sides of the two magnetic core columns;
the detection coil is wound on the outer side of one magnetic core column or wound on the outer sides of two magnetic core columns in series, and is positioned between the primary winding and the magnetic core columns or between the primary winding and the secondary winding.
The voltage of each turn of the primary winding or/and the secondary winding ranges from 8.5V to 10V;
the magnetic flux density B of the magnetic core of the boosting transformer ranges from 0.8T to 1.3T.
In the above scheme, when the detection coil is wound on the outer side of the magnetic core column, the detection coil may be wound on the inner side of the primary winding (i.e., between the magnetic core column and the primary winding) or wound on the outer side of the primary winding (i.e., between the primary winding and the secondary winding), provided that the detection coil is insulated from the magnetic core column, the primary winding, and the secondary winding. The accurate detection of the secondary output voltage of the booster transformer is realized through the detection coil, the detection of a high-voltage detection high-voltage transformer is replaced, and the condition that the direct-current magnetic bias overcurrent occurs when the booster transformer is in no-load can be avoided.
The magnetic core column is formed by combining silicon steel sheets, and the silicon steel sheets are non-oriented silicon steel sheets.
The scheme adopts the magnetic core column with low leakage inductance, high magnetic excitation resistance component and low magnetic excitation inductance component parameter setting, so that the step-up transformer realizes high impedance and low leakage inductance, and can avoid the problems of magnetic core saturation and no-load overcurrent of a load.
The primary windings are sequentially wound on the outer sides of the two magnetic core columns, and the primary windings wound on the outer sides of the two magnetic core columns are connected in series; and two terminals of the primary winding are respectively led out from the outer sides of the two magnetic core columns.
The secondary windings comprise two low-voltage windings and two medium-voltage windings, and when the primary windings are wound on the outer sides of the two magnetic core columns in series, one low-voltage winding and one medium-voltage winding are wound on the outer side of one magnetic core column in a wrapping manner or wound on the outer side of the primary winding on one magnetic core column; the other low-voltage winding and the other medium-voltage winding are wound on the outer side of the other magnetic core column in a wrapping mode, or wound on the outer side of a primary winding on the other magnetic core column.
The secondary windings form six terminals comprising two high-voltage terminals and four low-voltage terminals; the two medium-voltage windings respectively wound on the two magnetic core columns are connected in series to form a high-voltage winding, and two high-voltage terminals of the high-voltage winding are formed at the same time; the two low-voltage windings respectively wound on the two magnetic core columns simultaneously form four low-voltage wiring ends of the two low-voltage windings.
The six formed terminals implement series-parallel combination of a plurality of secondary windings through an external controllable switch or a short-circuit conductor, thereby realizing combination of various rated output voltages or various rated output currents.
The wire diameter of the high-voltage winding is smaller than that of the low-voltage winding.
The input voltage range of the primary winding is 200V-3000V; the output voltage range of the secondary winding is 3000-25000V.
The output voltage of the secondary winding is 12000V.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the scheme adopts low leakage inductance, high magnetic excitation resistance component and low magnetic excitation inductance component parameter setting, so that the step-up transformer realizes high impedance and low leakage inductance, and can avoid the problems of magnetic core saturation and no-load overcurrent of a load. The accurate detection of the secondary output voltage of the booster transformer can be realized through the detection coil, and the detection of a high-voltage detection high-voltage transformer is replaced.
(2) According to the scheme, the plurality of secondary windings are arranged, series-parallel connection combination can be achieved by combining an external switch and a lead so as to output various voltage and current combinations, optimal matching of secondary voltage output and silicon core load is achieved, the utilization rate of a secondary coil is improved, a voltage transformer is omitted, equivalent capacity of a step-up transformer is reduced, and finally the overall cost of a power supply of the polycrystalline silicon reduction furnace is greatly reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a prior art step-up transformer circuit in the background art;
FIG. 2 is a schematic diagram of the boost transformer circuit of the present invention;
FIG. 3 is a schematic diagram of the boost transformer circuit of the present invention;
fig. 4 is a schematic diagram of a primary winding wound around the outer sides of two magnetic core columns according to an embodiment of the present invention;
fig. 5 is the schematic diagram of the appearance structure of the step-up transformer of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Also, in the description of the present invention, the terms "first," "second," and the like are used solely for distinguishing between the descriptions and not necessarily for indicating or implying any actual such relationship or order between such entities or operations.
Example 1:
the utility model discloses a following technical scheme realizes, please see fig. 2, fig. 3, a step up transformer for polycrystalline silicon reduction furnace power, including a primary winding, a detection coil, a plurality of secondary winding, magnetic core, the magnetic core includes two core stems, and for easy understanding, two core stems are first core stem, second core stem respectively, but in the actual conditions, first core stem, second core stem can be interchanged, and structure, function homogeneous phase promptly. Wherein:
the primary winding is wound on the outer side of one magnetic core column or wound on the outer sides of two magnetic core columns in series. And the secondary windings are wound on the outer sides of the two magnetic core columns or the outer side of the primary winding.
As the most preferable scheme, please refer to fig. 4, which is a schematic diagram that the primary winding is wound on the outer sides of the two core legs in series, that is, the primary winding is wound on the outer sides of the first core leg and the second core leg respectively. At the moment, a plurality of secondary windings can be wound outside the primary winding according to the same winding mode of the primary winding; the winding can also be wound on the inner side of the primary winding, namely between the magnetic core column and the primary winding, according to the same winding mode of the primary winding.
But the direction of the primary winding wound on the magnetic core column is not limited, because in practical application, the direction of the primary winding on the outer side of the magnetic core column can be set according to the requirement of the current direction. More specifically, two terminals of the primary winding are respectively led out from the outer sides of the two magnetic core columns. And then a plurality of secondary windings are uniformly wound on the outer side of the primary winding in the same manner of the primary winding.
As another scheme, the primary winding is wound on the outer side of one magnetic core column, that is, the primary winding is wound on the outer side of the first magnetic core column or wound on the outer side of the second magnetic core column. At the moment, a plurality of secondary windings can be wound outside the primary winding and the other magnetic core column according to the same winding mode of the primary winding; and the magnetic core can also be wound on the inner side of the primary winding and the outer side of the other magnetic core column in the same winding way of the primary winding.
The detection coils are wound on the outer side of one magnetic core column or the outer sides of the two magnetic core columns, and when the detection coils are wound on the outer sides of the two magnetic core columns, the detection coils are connected in series. When the detection coil is wound on the outer side of the magnetic core column, the detection coil can be wound on the inner side of the primary winding (namely between the magnetic core column and the primary winding) or wound on the outer side of the primary winding (namely between the primary winding and the secondary winding), on the premise that the detection coil is insulated from the magnetic core column, the primary winding and the secondary winding.
The voltage of each turn of coil of the primary winding or/and the secondary winding in the step-up transformer ranges from 8.5V to 10V; the magnetic flux density B of the magnetic core of the step-up transformer ranges from 0.8T to 1.3T. Accurate detection of the secondary output voltage of the booster transformer can be achieved through the detection coil, detection of a high-voltage detection high-voltage transformer is replaced, and the condition that direct-current magnetic bias overcurrent occurs when the booster transformer is in no-load can be avoided.
The magnetic core column is formed by combining silicon steel sheets, and the silicon steel sheets are non-oriented silicon steel sheets. The step-up transformer realizes high impedance and low leakage inductance by adopting low leakage inductance, high magnetic excitation resistance components and low magnetic excitation inductance component parameter setting, and can avoid the problems of magnetic core saturation and no-load overcurrent of a load.
In a specific embodiment, when the primary winding is wound in series on the outer sides of the two core legs, the plurality of secondary windings may include two low-voltage windings and two medium-voltage windings, wherein one low-voltage winding and one medium-voltage winding are wound on the outer side of the first core leg in a wrapping manner (i.e., between the first core leg and the primary winding), or are wound on the outer side of the primary winding on the first core leg; the other low-voltage winding and the other medium-voltage winding are wound on the outer side of the second magnetic core column in a wrapping mode (namely between the second magnetic core column and the primary winding) or wound on the outer side of the primary winding of the second magnetic core column.
When the primary winding is wound on the first magnetic core column only, one of the low-voltage winding and the medium-voltage winding are wound on the outer side of the first magnetic core column in a wrapping mode (namely between the first magnetic core column and the primary winding) or wound on the outer side of the primary winding on the first magnetic core column; the other low-voltage winding and the other medium-voltage winding are wound outside the second magnetic core column in a wrapping mode (no primary winding is arranged on the second magnetic core column).
In the following description of the present embodiment, a primary winding is wound in series on the outer sides of two magnetic core legs, and a plurality of secondary windings are wound on the outer sides of the primary winding:
meanwhile, six terminals can be formed by a plurality of secondary windings, as shown in fig. 5, including two high-voltage terminals and four low-voltage terminals. Two medium voltage windings respectively wound on the first magnetic core column and the second magnetic core column are connected in series to form a high voltage winding, namely, in fig. 3, the medium voltage winding wound on the outer side of the primary winding on the first magnetic core column is provided with two terminals D1 and D2, the medium voltage winding wound on the outer side of the primary winding on the second magnetic core column is provided with two terminals C1 and C2, and after the terminal D1 and the terminal C2 are connected in series, the remaining terminal D2 and the terminal C1 form two high voltage terminals of the high voltage winding, as shown in fig. 2.
The wire diameter of the high-voltage winding is preferably smaller than that of the low-voltage winding, because the resistance value of the silicon core is large and the current is small when the load silicon core is not broken down, the wire diameter of the high-voltage winding can be smaller; on the contrary, after breakdown, the resistance value of the silicon core becomes smaller, and the loop current becomes larger, so that the low-voltage winding needs to bear larger current, and further the wire diameter of the low-voltage winding is larger.
Similarly, the low-voltage winding that is wound outside the primary winding on the first core leg has two low-voltage terminals a1, a2 (or terminals B1, B2), and the low-voltage winding that is wound outside the primary winding on the second core leg has two low-voltage terminals B1, B2 (or terminals a1, a 2).
Thus, a plurality of the secondary windings have a total of six terminals, terminal a1, terminal a2, terminal B1, terminal B2, terminal C1, and terminal D2, as can be seen in fig. 2.
And after the six terminals can be connected through an external controllable switch, the series-parallel connection combination conversion of the secondary windings is implemented through the control of the on and off of the external controllable switch, so that the combination of various rated output voltages or various rated output currents is realized.
Or, the six terminals can implement series-parallel connection combination conversion of a plurality of secondary windings through a short-circuit conductor, so that various rated output voltages or various rated output combinations are realized.
Through the arrangement of the plurality of secondary windings, series-parallel combination can be realized by combining an external switch and a lead so as to output various voltage and current combinations, the optimal matching of secondary voltage output and silicon core load is realized, the utilization rate of a secondary coil is improved, the equivalent capacity of a step-up transformer is reduced, and finally the overall cost of a power supply of the polycrystalline silicon reduction furnace is greatly reduced.
Furthermore, the input voltage range of the primary winding is 200V-3000V, preferably 760V; the output voltage of the secondary winding ranges from 3000V to 25000V, and the preferred output voltage of the secondary winding is 12000V. Therefore, the highest output voltage step ratio of the step-up transformer is preferably 760V: 12000V.
Furthermore, the magnetic core column is formed by combining silicon steel sheets, is a silicon iron soft magnetic alloy with extremely low carbon content, generally contains 0.5-4.5% of silicon, and can improve the resistivity and the maximum permeability of the magnetic core column by adding silicon, so that the coercive force, the magnetic core loss and the magnetic failure are reduced.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A step-up transformer for a power supply of a polycrystalline silicon reduction furnace is characterized in that: the device comprises a primary winding, a detection coil, a magnetic core and a plurality of secondary windings, wherein the magnetic core comprises two magnetic core columns; wherein,
the primary winding is wound on the outer side of one magnetic core column or wound on the outer sides of two magnetic core columns in series; the secondary windings are wound on the outer sides of the two magnetic core columns;
the detection coil is wound on the outer side of one magnetic core column or wound on the outer sides of two magnetic core columns in series, and is positioned between the primary winding and the magnetic core columns or between the primary winding and the secondary winding.
2. The step-up transformer for the power supply of the polycrystalline silicon reduction furnace according to claim 1, characterized in that: the voltage of each turn of the primary winding or/and the secondary winding ranges from 8.5V to 10V; the magnetic flux density B of the magnetic core of the step-up transformer ranges from 0.8T to 1.3T.
3. The step-up transformer for the power supply of the polycrystalline silicon reduction furnace according to claim 1, characterized in that: the magnetic core column is formed by combining silicon steel sheets, and the silicon steel sheets are non-oriented silicon steel sheets.
4. The step-up transformer for the power supply of the polycrystalline silicon reduction furnace according to claim 1, characterized in that: the primary windings are sequentially wound on the outer sides of the two magnetic core columns, and the primary windings wound on the outer sides of the two magnetic core columns are connected in series; and two terminals of the primary winding are respectively led out from the outer sides of the two magnetic core columns.
5. The step-up transformer for the power supply of the polycrystalline silicon reduction furnace according to claim 1, characterized in that: the secondary windings comprise two low-voltage windings and two medium-voltage windings, and when the primary windings are wound on the outer sides of the two magnetic core columns in series, one low-voltage winding and one medium-voltage winding are wound on the outer side of one magnetic core column in a wrapping manner or wound on the outer side of the primary winding on one magnetic core column; the other low-voltage winding and the other medium-voltage winding are wound on the outer side of the other magnetic core column in a wrapping mode, or wound on the outer side of a primary winding on the other magnetic core column.
6. The step-up transformer for the power supply of the polycrystalline silicon reduction furnace according to claim 5, characterized in that: the secondary windings form six terminals comprising two high-voltage terminals and four low-voltage terminals; the two medium-voltage windings respectively wound on the two magnetic core columns are connected in series to form a high-voltage winding, and two high-voltage terminals of the high-voltage winding are formed at the same time; the two low-voltage windings respectively wound on the two magnetic core columns simultaneously form four low-voltage wiring ends of the two low-voltage windings.
7. The step-up transformer for the power supply of the polycrystalline silicon reduction furnace according to claim 6, characterized in that: the six formed terminals implement series-parallel combination of a plurality of secondary windings through an external controllable switch or a short-circuit conductor, thereby realizing combination of various rated output voltages or various rated output currents.
8. The step-up transformer for the power supply of the polycrystalline silicon reduction furnace according to claim 6, characterized in that: the wire diameter of the high-voltage winding is smaller than that of the low-voltage winding.
9. The step-up transformer for the power supply of the polycrystalline silicon reduction furnace according to claim 1, characterized in that: the input voltage range of the primary winding is 200V-3000V; the output voltage range of the secondary winding is 3000-25000V.
10. The step-up transformer for the power supply of the polycrystalline silicon reduction furnace according to claim 9, characterized in that: the output voltage of the secondary winding is 12000V.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121397947.2U CN213815787U (en) | 2021-06-23 | 2021-06-23 | Step-up transformer for power supply of polycrystalline silicon reduction furnace |
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| CN202121397947.2U CN213815787U (en) | 2021-06-23 | 2021-06-23 | Step-up transformer for power supply of polycrystalline silicon reduction furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114039495A (en) * | 2021-10-27 | 2022-02-11 | 中国航空制造技术研究院 | Low leakage inductance boosting power transformer for electron beam high-voltage acceleration power supply |
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2021
- 2021-06-23 CN CN202121397947.2U patent/CN213815787U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114039495A (en) * | 2021-10-27 | 2022-02-11 | 中国航空制造技术研究院 | Low leakage inductance boosting power transformer for electron beam high-voltage acceleration power supply |
| CN114039495B (en) * | 2021-10-27 | 2024-04-09 | 中国航空制造技术研究院 | Low leakage inductance boost power transformer for electron beam high-voltage accelerating power supply |
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