CN207250304U - Insulation encapsulated single-phase high voltage step-up transformer - Google Patents
Insulation encapsulated single-phase high voltage step-up transformer Download PDFInfo
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- CN207250304U CN207250304U CN201721032483.9U CN201721032483U CN207250304U CN 207250304 U CN207250304 U CN 207250304U CN 201721032483 U CN201721032483 U CN 201721032483U CN 207250304 U CN207250304 U CN 207250304U
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Abstract
The utility model insulation encapsulated single-phase high voltage step-up transformer includes primary coil, secondary coil, iron core, high-voltage capacitors connected in parallel device between primary coil and iron core or between secondary coil and iron core.The high-voltage capacitor meets condition：Iron core is equal to the ratio between secondary total capacitance primary total capacitance and iron core transformer secondary coil to the pressure-resistant and primary coil of iron core to the ratio between pressure-resistant of iron core.The utility model ensure it is primary to core insulation and secondary to the insulation margin of core insulation on the basis of, can be to avoid surdimensionnement, so as to reduce design cost, so that when doing secondary to transformer to primary voltage-withstand test, secondary voltage and primary to iron core is to the voltage of iron core all in the pressure-resistant scope accordingly to insulate.
Description
【Technical field】
High-tension apparatus field is the utility model is related to, it is exhausted more particularly, to a kind of insulation encapsulated single-phase high voltage step-up transformer
Edge technology.
【Background technology】
Insulation encapsulated single-phase high voltage step-up transformer is a kind of dry-type transformer of special construction, is mainly used in a variety of high
Press equipment and autoclave appts.The Insulation test of transformer needs to do dielectric strength experiment (also known as voltage-withstand test).
When doing secondary to transformer to primary voltage-withstand test, insulation encapsulated single-phase high voltage step-up transformer primary is to iron
Core, the secondary voltage's distribiuting to iron core determine that the dielectric of transformer will meet the condition of long-term work by impedance distribution, choosing
Be significantly larger than capacitive reactance with the DC impedance of solid insulating material, it is therefore contemplated that primary to the voltage of iron core and time
Level is inversely proportional the ratio between capacitance of iron core the capacitance of iron core and secondary with primary the ratio between voltage of iron core.
Under normal circumstances, for insulation encapsulated single-phase high voltage step-up transformer, primary voltage is relatively low, selects the insulation of skeleton
Thinner thickness；Secondary voltage is far above primary voltage, selects the insulation thickness of skeleton thicker；For insulation encapsulated single-phase high voltage liter
Pressure transformer, the solid insulating material of embedding and the dielectric constant of skeleton insulating materials are far above air, and iron core is to primary electricity
Hold and iron core is all more stable to secondary capacitance；Meanwhile iron core to primary capacitance and iron core to the ratio between secondary capacitance no
Equal to transformer secondary output to the pressure-resistant and primary to the ratio between pressure-resistant of iron core of iron core.
For the angle of the insulating Design of transformer, transformer secondary output is to the primary pressure-resistant secondary that is slightly less than to iron core
It is pressure-resistant and it is primary to iron core it is the sum of pressure-resistant when, design cost is relatively low.
For insulation encapsulated single-phase high voltage step-up transformer, secondary to iron core it is pressure-resistant and primary to iron core it is pressure-resistant it
With slightly larger than desired transformer secondary output to it is primary it is pressure-resistant in the case of, the utility model is exactly to be considered as technology of pressure equalization,
So that when doing secondary to transformer to primary voltage-withstand test, it is secondary all to exist to the voltage of iron core and the primary voltage to iron core
In the pressure-resistant scope accordingly to insulate.
The design of existing insulation encapsulated single-phase high voltage step-up transformer, does not account for inside transformer insulated core and first, secondary
Insulation distribution between level, when design is met the requirements, one of at least primary insulation to iron core or the secondary insulation to iron core
It is surdimensionnement, cost is higher, and transformer is heavier；When designing unreasonable, primary insulation or secondary to iron core is to iron core
One of insulation insulation is inadequate, is often damaged in test or use.
Therefore it provides a kind of design insulation encapsulated single-phase high voltage step-up transformer reasonable, that cost is low.
【The content of the invention】
Reasonable, lower-cost insulation encapsulated single-phase high voltage boosting is designed the purpose of this utility model is to provide one kind to become
Depressor.
To realize the utility model aim, there is provided following technical scheme：
A kind of insulation encapsulated single-phase high voltage step-up transformer is provided, it includes primary coil, secondary coil, iron core, first
High-voltage capacitors connected in parallel device is pressed between level coil and iron core or between secondary coil and iron core.Preferably, it is contemplated that primary
Voltage is relatively low, and the pressure-resistant design between primary and iron core is generally relatively weak, and high-voltage capacitor is generally connected in parallel on primary and iron core
Between.
When occurring the high voltage for threatening insulation between secondary coil and primary coil, insulation system and insulation in transformer
In the case that material limits, the utility model parallel high voltage electricity between primary coil and iron core or between secondary coil and iron core
Container, may be such that the electric stress of insulating materials is minimum.
Preferably, high-voltage capacitor meets condition：Iron core is to primary total capacitance and iron core to the ratio between secondary total capacitance
Equal to transformer secondary coil to the pressure-resistant and primary coil of iron core to the ratio between pressure-resistant of iron core.
If primary coil is to the capacitance C1 between iron core, secondary coil is to the capacitance C2 between iron core, and primary coil is to iron
Pressure-resistant between core is U10, and secondary coil is U20 to pressure-resistant between iron core, in parallel pressure-resistant between primary coil and iron core
Enough high-voltage capacitor C10 are pressed, then C10 meets condition：(C1+C10)/C2=U20/U10.
Preferably, if the dielectric strength test voltage between primary coil/secondary coil is U12, iron core is to primary line
The voltage of circle is：U11=C2*U12/ (C1+C2+C10), iron core are to the voltage of secondary coil：U21=(C1+C10) * U12/
(C1+C2+C10)。
The prior art is contrasted, the utility model has the following advantages：
The design of existing insulation encapsulated single-phase high voltage step-up transformer, does not account for inside transformer insulated core and first, secondary
Insulation distribution between level, when design is met the requirements, one of at least primary insulation to iron core or the secondary insulation to iron core
It is surdimensionnement, cost is higher, and transformer is heavier；When designing unreasonable, primary insulation or secondary to iron core is to iron core
One of insulation insulation is inadequate, is often damaged in test or use.After the utility model, ensureing primary to core insulation
With secondary to the insulation margin of core insulation on the basis of, can be to avoid surdimensionnement, so as to reduce design cost.Filled for insulation
Single-phase high voltage step-up transformer is sealed, desired transformation is slightly larger than to the sum of pressure-resistant of iron core to the pressure-resistant and primary of iron core in secondary
Device secondary to it is primary it is pressure-resistant in the case of, the utility model is exactly to be considered as technology of pressure equalization so that transformer is being done time
When level is to primary voltage-withstand test, secondary voltage and primary to iron core is to the voltage of iron core all in the pressure-resistant scope accordingly to insulate
It is interior.
【Brief description of the drawings】
Fig. 1 is the insulation encapsulated single-phase high voltage step-up transformer structure diagram that the utility model is related to；
Fig. 2 is the utility model embodiment circuit diagram.
【Embodiment】
Referring to Fig. 1, the insulation encapsulated single-phase high voltage step-up transformer structure diagram that the utility model is related to, in order to just
In understanding, before specific embodiment is described, Fig. 1 is first passed through to the utility model insulation encapsulated single-phase high voltage step-up transformer
Principle be described.The iron core 150 and primary coil 120 (low pressure winding) of the insulation encapsulated single-phase high voltage step-up transformer,
Secondary coil 140 (high-voltage winding) is all by sealing in the epoxy resin 110 in plastic shell 130.
Fig. 1 and Fig. 2 are please referred to, Fig. 2 middle-and high-voltage capacitors C10 is connected in parallel on primary coil 120 (L1 in figure) and iron core
Between 150, it is presently preferred to one embodiment be：The insulation encapsulated single-phase high voltage step-up transformer of structure shown in Fig. 1, it is primary defeated
Enter voltage U1=220V~, secondary output voltage U2=9000V~, primary coil 120 is to the capacitance C1 between iron core 150
73pF, secondary coil 140 (L2 in figure) are 78pF to the capacitance C2 between iron core 150, primary coil 120 and iron core 150 it
Between pressure-resistant enough high-voltage capacitor C10 in parallel pressed.Dielectric strength test electricity between primary coil/secondary coil
Press for U12=23000V~.Primary coil 120 between iron core 150 it is pressure-resistant for U10=6000V~, secondary coil 140 is right
Between iron core 150 it is pressure-resistant for U20=22500V~.C10 meets condition：
(C1+C10)/C2=U20/U10=22500/6000.
C10=C2*U20/U10-C1
=C2*22500/6000-C1
=78*22500/6000-73
=219.5pF,
C10 capacitors choose 220pF, 20KVDC super-pressure ceramic capacitors.
Implementation is not pressed for example using high-voltage capacitor C10, the test between primary coil/secondary coil is carried out
Voltage U12 be 23000V~dielectric strength test when, iron core 150 is to the voltage of primary coil 120：
U11=C2*U12/ (C1+C2)
=78*23000/ (78+73)
=11881V~,
, will be breakdown far above primary coil 120 to the pressure-resistant U10 between iron core 150；In primary coil 120 to iron core
Before 150 insulation breakdown, iron core is to the voltage of secondary coil 140：
U21=C1*U12/ (C1+C2)
=73*23000/ (78+73)
=11119V~,
Less than secondary coil 140 to the pressure-resistant U20 between iron core 150, do not puncture；But in primary coil 120 to iron core 150
Insulation breakdown after, iron core 150 voltage of secondary coil 140 is changed into 23000V~, higher than secondary coil 140 to iron core 150
Between pressure-resistant U20, it would be possible to it is breakdown.
When embodiment uses high-voltage capacitor C10 by Fig. 2, the test voltage between primary coil/secondary coil is carried out
U12=23000V~dielectric strength test when, iron core 150 is to the voltage of primary coil 120：
U11=C2*U12/ (C1+C2+C10)
=78*23000/ (78+73+220)
=4836V~,
Less than primary coil 120 to the pressure-resistant U10 between iron core 150, there is larger insulation margin；Iron core is to secondary coil
140 voltage is：
U21=(C1+C10) * U12/ (C1+C2+C10)
=(73+220) * 23000/ (78+73+220)
=18165V~,
Less than secondary to the pressure-resistant U20 between iron core, there is larger insulation margin.
The above is only the preferred embodiment of the present invention, and the scope of protection of the utility model is not limited thereto,
Any equivalent transformation based in technical solutions of the utility model is belonged within scope of protection of the utility model.
Claims (4)
1. a kind of insulation encapsulated single-phase high voltage step-up transformer, it includes primary coil, secondary coil, iron core, it is characterised in that
High-voltage capacitors connected in parallel device between primary coil and iron core or between secondary coil and iron core.
2. insulation encapsulated single-phase high voltage step-up transformer as claimed in claim 1, it is characterised in that the high-voltage capacitor meets
Condition：Iron core is equal to transformer secondary coil to the pressure-resistant of iron core to primary total capacitance and iron core to the ratio between secondary total capacitance
With primary coil to the ratio between pressure-resistant of iron core.
3. insulation encapsulated single-phase high voltage step-up transformer as claimed in claim 1, it is characterised in that primary coil to iron core it
Between capacitance C1, secondary coil is to the capacitance C2 between iron core, and primary coil is U10 to pressure-resistant between iron core, secondary coil
It is U20 to pressure-resistant between iron core, pressure-resistant enough high-voltage capacitor C10 in parallel are carried out equal between primary coil and iron core
Pressure, then C10 meets condition：(C1+C10)/C2=U20/U10.
4. insulation encapsulated single-phase high voltage step-up transformer as claimed in claim 3, it is characterised in that primary coil/secondary wire
Dielectric strength test voltage between circle is U12, and iron core is to the voltage of primary coil：U11=C2*U12/ (C1+C2+
C10), iron core is to the voltage of secondary coil：U21=(C1+C10) * U12/ (C1+C2+C10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721032483.9U CN207250304U (en) | 2017-08-17 | 2017-08-17 | Insulation encapsulated single-phase high voltage step-up transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721032483.9U CN207250304U (en) | 2017-08-17 | 2017-08-17 | Insulation encapsulated single-phase high voltage step-up transformer |
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| Publication Number | Publication Date |
|---|---|
| CN207250304U true CN207250304U (en) | 2018-04-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107464677A (en) * | 2017-08-17 | 2017-12-12 | 深圳市艾尔曼医疗电子仪器有限公司 | Insulation encapsulated single-phase high-voltage step-up transformer |
-
2017
- 2017-08-17 CN CN201721032483.9U patent/CN207250304U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107464677A (en) * | 2017-08-17 | 2017-12-12 | 深圳市艾尔曼医疗电子仪器有限公司 | Insulation encapsulated single-phase high-voltage step-up transformer |
| CN107464677B (en) * | 2017-08-17 | 2024-06-07 | 深圳市艾尔曼医疗电子仪器有限公司 | Insulation potting single-phase high-voltage step-up transformer |
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