WO2019033335A1 - Transformateur survolteur à haute tension, monophasé, isolé et encapsulé - Google Patents

Transformateur survolteur à haute tension, monophasé, isolé et encapsulé Download PDF

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Publication number
WO2019033335A1
WO2019033335A1 PCT/CN2017/097829 CN2017097829W WO2019033335A1 WO 2019033335 A1 WO2019033335 A1 WO 2019033335A1 CN 2017097829 W CN2017097829 W CN 2017097829W WO 2019033335 A1 WO2019033335 A1 WO 2019033335A1
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WO
WIPO (PCT)
Prior art keywords
core
voltage
primary
transformer
coil
Prior art date
Application number
PCT/CN2017/097829
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English (en)
Chinese (zh)
Inventor
薛军
贾月超
Original Assignee
深圳市艾尔曼医疗电子仪器有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市艾尔曼医疗电子仪器有限公司 filed Critical 深圳市艾尔曼医疗电子仪器有限公司
Priority to PCT/CN2017/097829 priority Critical patent/WO2019033335A1/fr
Publication of WO2019033335A1 publication Critical patent/WO2019033335A1/fr

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Classifications

    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof

Definitions

  • the present invention relates to the field of high voltage equipment, and more particularly to an insulation potting single phase high voltage step-up transformer insulation technique.
  • Insulated potting single-phase high-voltage step-up transformer is a special structure of dry-type transformer, mainly used in a variety of high-voltage equipment and high-voltage instruments. Insulation testing of transformers requires a dielectric strength test (also known as a withstand voltage test).
  • the voltage distribution of the primary-to-iron core and the secondary-pair iron core of the insulated potting single-phase high-voltage step-up transformer is determined by the impedance distribution, and the insulating medium of the transformer is satisfied.
  • the DC resistance of the solid insulating material is much larger than the capacitive reactance. Therefore, the ratio of the voltage of the transformer primary to the core and the voltage of the secondary to the core can be considered as the capacitance and secondary pair of the primary core.
  • the ratio of the capacitance of the iron core is inversely proportional.
  • the primary voltage is lower, and the insulation thickness of the selected skeleton is thin; the secondary voltage is much higher than the primary voltage, and the insulation thickness of the skeleton is thicker; Potting single-phase high-voltage step-up transformer, the dielectric constant of potting solid insulation material and skeleton insulation material is much higher than that of air, and the iron core is relatively stable to the primary capacitance and the core to secondary capacitance; The ratio of the core to primary capacitance and the core to secondary capacitance is not equal to the transformer secondary to core withstand voltage and primary to core withstand voltage ratio.
  • the secondary voltage of the transformer to the primary is slightly smaller than the sum of the withstand voltage of the secondary core and the withstand voltage of the primary to the core, and the design cost is low.
  • the existing insulated potting single-phase high-voltage step-up transformer design does not consider the internal insulation core of the transformer and the initial The insulation distribution between the secondary parts is designed to meet the requirements. At least one of the insulation of the primary core or the insulation of the secondary core is over-designed, the cost is higher, the transformer is more cumbersome; the design is unreasonable, the primary pair The insulation of the core or the insulation of the secondary to the core is not sufficiently insulated and is often damaged during testing or use.
  • An insulating potting single-phase high-voltage step-up transformer which comprises a primary coil, a secondary coil, a core, and a high voltage capacitor is connected between the primary coil and the iron core or between the secondary coil and the iron core for voltage equalization .
  • the withstand voltage design between the primary and the iron core is generally relatively weak, and the high piezoelectric container is generally connected in parallel between the primary and the core.
  • a high voltage ⁇ which threatens insulation occurs between the secondary coil and the primary coil, and the present invention is between the primary coil and the iron core or between the secondary coil and the iron core in the case where the insulating structure of the transformer and the insulating material are defined.
  • Parallel high voltage capacitors minimize electrical stress in the insulating material.
  • the high voltage capacitor satisfies the condition: the ratio of the total capacitance of the core to the primary and the total capacitance of the core to the secondary is equal to the withstand voltage of the secondary coil of the transformer to the core and the withstand voltage of the primary coil to the core. ratio.
  • the dielectric strength test voltage between the primary coil and the secondary coil is U12
  • the existing insulated potting single-phase high-voltage step-up transformer design does not consider the insulation distribution between the inner insulating core of the transformer and the primary and secondary, and the design meets the requirements, at least the insulation or secondary of the primary core.
  • One of the insulation of the iron core is over-designed, the cost is high, the transformer is cumbersome; the design is unreasonable, the primary insulation of the iron core or the insulation of the secondary core is insufficient, often damaged during testing or use. .
  • over-design can be avoided to reduce the design cost while ensuring the insulation margin of the primary core insulation and the secondary core insulation.
  • the present invention is in the case where the sum of the withstand voltage of the secondary core and the withstand voltage of the primary to the core is slightly larger than the required secondary resistance of the secondary to the transformer. Considering the equalization technique, the voltage of the secondary core and the voltage of the primary to the core are within the withstand voltage range of the corresponding insulation after the secondary to primary withstand voltage test of the transformer.
  • FIG. 1 is a schematic structural view of an insulated potting single-phase high-voltage step-up transformer according to the present invention.
  • FIG. 2 is a circuit schematic diagram of an embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of an insulated potting single-phase high-voltage step-up transformer according to the present invention.
  • the single-phase high-voltage boosting of the insulating potting of the present invention is first described by using FIG. 1 before describing a specific embodiment. The principle of the transformer is described.
  • the core 150 of the insulated potting single-phase high-voltage step-up transformer and the primary coil 120 (low voltage winding) and the secondary coil 140 (high voltage winding) are both sealed in the epoxy resin 110 in the plastic casing 130.
  • the high voltage capacitor C10 of FIG. 2 is connected in parallel between the primary coil 120 (L1 in the figure) and the core 150.
  • C10 meets the conditions:
  • the C10 capacitor is a 220pF, 20KVDC ultra-high voltage ceramic capacitor.
  • the voltage equalization is not performed using the high voltage capacitor C10.
  • the dielectric strength test of the test voltage U12 between the primary coil and the secondary coil is 23000 ⁇
  • the voltage of the core 150 to the primary coil 120 is: 0030]
  • U11 C2*U12/(C1+C2)
  • the withstand voltage U10 between the core 150 and the core 150 is to be broken down; before the insulation breakdown of the core 150 by the primary coil 120, the voltage of the core to the secondary coil 140 is:
  • the voltage of the core 150 to the primary coil 120 is:

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

L'invention concerne un transformateur survolteur à haute tension, monophasé, isolé et encapsulé, comprenant une bobine primaire (120), une bobine secondaire (140) et un noyau (150). Un condensateur à haute tension (C10) est connecté en parallèle entre la bobine primaire et le noyau ou entre la bobine secondaire et le noyau. Le condensateur à haute tension satisfait à la condition selon laquelle le rapport de la capacité totale (C1) entre le noyau et l'étage primaire à la capacité totale (C2) entre le noyau et l'étage secondaire est égal au rapport de la tension de tenue (U20) de la bobine secondaire du transformateur par rapport au noyau à la tension de tenue (U10) de la bobine primaire par rapport au noyau. Tout en assurant une isolation entre l'étage primaire et le noyau et entre l'étage secondaire et le noyau, la présente invention évite le surdimensionnement et réduit les coûts de conception, et permet, lors de la réalisation d'un essai de tension de tenue du transformateur pour l'étage secondaire à l'étage primaire, que les tensions des étages secondaire et primaire par rapport au noyau soient dans des plages de tension de tenue d'isolation correspondantes.
PCT/CN2017/097829 2017-08-17 2017-08-17 Transformateur survolteur à haute tension, monophasé, isolé et encapsulé WO2019033335A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/097829 WO2019033335A1 (fr) 2017-08-17 2017-08-17 Transformateur survolteur à haute tension, monophasé, isolé et encapsulé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/097829 WO2019033335A1 (fr) 2017-08-17 2017-08-17 Transformateur survolteur à haute tension, monophasé, isolé et encapsulé

Publications (1)

Publication Number Publication Date
WO2019033335A1 true WO2019033335A1 (fr) 2019-02-21

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PCT/CN2017/097829 WO2019033335A1 (fr) 2017-08-17 2017-08-17 Transformateur survolteur à haute tension, monophasé, isolé et encapsulé

Country Status (1)

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WO (1) WO2019033335A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2710120Y (zh) * 2004-05-24 2005-07-13 力铭科技股份有限公司 耐高压变压器
JP2013070539A (ja) * 2011-09-24 2013-04-18 Shiga Sekkei Co Ltd 絶縁型双方向ｄｃ−ｄｃコンバータ
CN103839662A (zh) * 2013-11-30 2014-06-04 芜湖国睿兆伏电子有限公司 一种灌封式高压变压器
CN203690069U (zh) * 2013-11-30 2014-07-02 芜湖国睿兆伏电子有限公司 一种灌封式高压变压器
CN105810418A (zh) * 2016-05-05 2016-07-27 上海兆启新能源科技有限公司 一种单相大功率特殊绝缘结构的高压高频变压器
CN107464677A (zh) * 2017-08-17 2017-12-12 深圳市艾尔曼医疗电子仪器有限公司 绝缘灌封单相高压升压变压器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2710120Y (zh) * 2004-05-24 2005-07-13 力铭科技股份有限公司 耐高压变压器
JP2013070539A (ja) * 2011-09-24 2013-04-18 Shiga Sekkei Co Ltd 絶縁型双方向ｄｃ−ｄｃコンバータ
CN103839662A (zh) * 2013-11-30 2014-06-04 芜湖国睿兆伏电子有限公司 一种灌封式高压变压器
CN203690069U (zh) * 2013-11-30 2014-07-02 芜湖国睿兆伏电子有限公司 一种灌封式高压变压器
CN105810418A (zh) * 2016-05-05 2016-07-27 上海兆启新能源科技有限公司 一种单相大功率特殊绝缘结构的高压高频变压器
CN107464677A (zh) * 2017-08-17 2017-12-12 深圳市艾尔曼医疗电子仪器有限公司 绝缘灌封单相高压升压变压器

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