EP4071775A1 - Reaktor zur reduzierung von oberwellen - Google Patents

Reaktor zur reduzierung von oberwellen Download PDF

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Publication number
EP4071775A1
EP4071775A1 EP20954219.0A EP20954219A EP4071775A1 EP 4071775 A1 EP4071775 A1 EP 4071775A1 EP 20954219 A EP20954219 A EP 20954219A EP 4071775 A1 EP4071775 A1 EP 4071775A1
Authority
EP
European Patent Office
Prior art keywords
coil
reactor
bobbin
shaped core
reducing harmonics
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP20954219.0A
Other languages
English (en)
French (fr)
Other versions
EP4071775A4 (de
Inventor
Wha Jun CHA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TSE Co Ltd
Original Assignee
TSE Co Ltd
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 TSE Co Ltd filed Critical TSE Co Ltd
Publication of EP4071775A1 publication Critical patent/EP4071775A1/de
Publication of EP4071775A4 publication Critical patent/EP4071775A4/de
Pending legal-status Critical Current

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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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/38—Auxiliary core members; Auxiliary coils or windings
    • H01F27/385—Auxiliary core members; Auxiliary coils or windings for reducing harmonics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps
    • 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
    • H01F27/02—Casings
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support
    • 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
    • H01F27/2823—Wires
    • H01F27/2828—Construction of conductive connections, of leads
    • 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
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • 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
    • 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
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/325—Coil bobbins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • H01F2005/043—Arrangements of electric connections to coils, e.g. leads having multiple pin terminals, e.g. arranged in two parallel lines at both sides of the coil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • H01F2005/046—Details of formers and pin terminals related to mounting on printed circuits

Definitions

  • the present invention relates to a reactor for reducing harmonics, and more specifically, a reactor for reducing harmonics that is capable of having a mounting groove and a projection formed on a bobbin around which a coil is wound to allow one end of the coil to be spaced apart from the other end thereof, thereby preventing a short circuit from occurring.
  • An alternating voltage and an alternating current are sinusoids, but input current to a rectifier, inverter, etc. is a distorted wave that is distorted in waveform, not sinusoids.
  • the distortion wave means that frequency components having an integer multiple of the fundamental frequency of 50 or 60 Hz are overlaid on the fundamental frequency to cause distortion in waveform, and the high frequency components overlaid on the fundamental frequency are called harmonics.
  • the third order harmonic is the third multiple of the fundamental frequency
  • the fifth order harmonic is the fifth multiple of the fundamental frequency.
  • the harmonic distortion is generated by the load of a power system, the non-linear characteristics of equipment, and most of power electronic devices using a switching operation of a power semiconductor device.
  • the harmonic distortion causes power loss and quality degradation, and due to the lost power, overheating of equipment and a conductor and malfunctions of a motor and equipment may occur, thereby having problems of a transformer and power distribution. Accordingly, the harmonic regulation is adopted to efficiently operate power generation equipment by country. According to IEC/EN 61000-3:2014 of Europe, the existing Class A standard is changed to Class D standard on July 2017 to strictly regulate harmonic emission.
  • an active Power Factor Controller (PFC) is adopted to control a current pulse width, or a passive PFC is adopted to suppress the peak value of charging current by means of a reactor and to enlarge a conduction angle, so that a waveform of input current at an alternating current side becomes close to the sinusoids.
  • PFC Power Factor Controller
  • inductance L value
  • R value series resistance
  • the coil In the case where the coil is wound in a limited space to achieve high L value, however, the coil collectedly puts together in the condense space so that current may not flow to a designed length, a short circuit may occur to raise the current within a circuit, heat may be generated from an electric wire to cause fire dangers, and substrate circuit elements may not be resistant to current intensity and thus burned.
  • the present invention has been made in view of the above-mentioned problems occurring in the related art, and it is an object of the present invention to provide a reactor for reducing harmonics that is capable of providing a structure of a bobbin wherein one end of a coil is spaced apart from the other end of the coil, even while the coil is being wound compactly around a limited space of the bobbin, thereby ensuring high L and resistance values even in an appropriate size thereof to satisfy the Class D European standard.
  • a reactor for reducing harmonics according to the present invention that is provided with a bobbin structure in which one end of a coil is mounted on a mounting groove, so that current flows to the coil to the wound shape, thereby causing no short circuit and ensuring desired L and resistance values.
  • a reactor for reducing harmonics including: a core formed of a plurality of stacked silicon steel sheets and having an E-shaped core part and an I-shaped core part coupled to top of the E-shaped core part, both ends of the E-shaped core part being contactedly coupled to both ends of the I-shaped core part, and the central portion of the E-shaped core part being spaced apart from the I-shaped core part by a given air gap; and a bobbin having an accommodation hole formed on the inner peripheral surface thereof correspondingly to the central portion of the core to be press-fitted to the central portion of the core and a winding part and edge parts disposed on the outer peripheral surface thereof, the winding part being adapted to wind a coil therearound and the edge parts being adapted to hold the position of the coil C wound, wherein the edge part of the bobbin has a mounting groove extending to the outer peripheral surface of the winding part to mount one end of the coil wound.
  • the E-shaped core part and the I-shaped core part are coupled to each other by means of the insertion of protrusions into coupling grooves.
  • the bobbin may have a projection formed outwardly from the edge part on which the mounting groove is formed, and one end of the coil passes through the mounting groove from the outer peripheral surface of the winding part, is wound around the projection, and is then seated on the outer peripheral surface of the bobbin.
  • the bobbin may have a guide groove formed on one surface of the edge part on which the mounting groove is formed to guide the mounting position of the other end of the coil that corresponds to the mounting groove.
  • the winding part around which the coil is wound may be surrounded by an insulation sheet, and one end and the other end of the coil are connected correspondingly to lead wires on the outside of the insulation sheet by means of soldering.
  • the bobbin may have mounting grooves symmetrically formed on one surface of the edge part to mount one end and the other end of the coil, respectively and electrode pins located on one surface of the edge part on which the mounting grooves are formed to wind one end and the other end of the coil drawn from the mounting grooves, the electrode pins being connected to one end of the other end of the coil by means of soldering.
  • the bobbin may have projections symmetrically formed outwardly from the edge part on which the mounting grooves are formed, and one end and the other end of the coil pass through the mounting grooves from the outer peripheral surface of the winding part, are wound around the projections and the electrode pins sequentially, and are then connected to the electrode pins by means of soldering.
  • the reactor for reducing harmonics may further include a cover adapted to surround the outsides of the core and the bobbin.
  • the reactor for reducing harmonics is configured to have the mounting groove and the projection formed on the bobbin around which the coil is wound to mount one end of the coil thereon, so that one end of the coil is spaced apart from the other end of the coil, and even though the coil is wound compactly in a limited space of the bobbin, accordingly, there are no fire dangers due to a short circuit.
  • the reactor for reducing harmonics is configured to allow the coil to be systematically wound around the bobbin through the mounting groove and the projection formed on the bobbin, so that the coil can be compactly wound, without any short circuit, and high L and resistance values can be ensured even in an appropriate size thereof to thus satisfy the Class D European standard.
  • the reactor for reducing harmonics is configured to allow the E-shaped core part and the I-shaped core part to be fastened to each other by means of the coupling groove and the protrusion to form the desired air gap in design, thereby enhancing the reliability of the product.
  • FIG. 1 is a front view showing a reactor for reducing harmonics according to the present invention, wherein a bobbin 20 around which a coil C is wound and a core 10 are coupled to each other
  • FIG. 2 is a front view showing a coupling relation of the core 10 of the reactor for reducing harmonics according to the present invention
  • FIG. 3 is a partially enlarged view showing the bobbin 20 of the reactor for reducing harmonics according to the present invention to express the form of the coil C wound around the bobbin 20
  • FIGs. 4a and 4b are front and sectional views showing the bobbin 20 of the reactor for reducing harmonics according to the present invention to express a coupling relation between the coil C and lead wires 40.
  • the present invention relates to a reactor for reducing harmonics that is capable of satisfying the reinforced European standards for harmonic generation limitations, and as shown in FIG. 2 , the reactor for reducing harmonics according to the present invention includes a core 10 and a bobbin 20 around which a coil C is wound.
  • the core 10 is formed of a plurality of stacked silicon steel sheets, and as shown in FIGs. 1 and 2 , the core 10 is largely divided into an E-shaped core part 11 and an I-shaped core part 12 coupled to top of the E-shaped core part 11. Both ends of the E-shaped core part 11 are contactedly coupled to both ends of the I-shaped core part 12, and the central portion of the E-shaped core part 11 is spaced apart from the I-shaped core part 12 to form an air gap G therebetween. If the air gap G is large, the L value becomes low, and contrarily, if the air gap G is short, the L value becomes high.
  • the air gap G is a factor having an influence on the L value, and so as to ensure desired L value, it is important to form the air gap G as designed.
  • the number of stacked silicon steel sheets on top of each other, the widths of the E-shaped core part 11 and the I-shaped core part 12, and the size of the air gap G formed by the separation of the central portion of the E-shaped core part 11 from the I-shaped core part 12 are determined by calculating the L value and the resistance value according to the capacity of the reactor.
  • the core 10 is made by stacking the silicon steel sheets, and the E-shaped core part 11 and the I-shaped core part 12 have to be made to have the shapes and widths as designed.
  • the size of the air gap G has an influence on the L value, and accordingly, there is a need to couple the E-shaped core part 11 and the I-shaped core part 12 to each other so as to achieve the desired air gap G in design.
  • the E-shaped core part 11 has coupling grooves 13 formed on both ends thereof, and the I-shaped core part 12 has protrusions 14 protruding from both ends thereof, so that through the insertion of the protrusions 14 into the coupling grooves 13, they are coupled to each other.
  • the central portion of the E-shaped core part 11 is spaced apart from the I-shaped core part 12 to form the desired air gap G, thereby providing the core 10 configured to be capable of ensuring the desired L and resistance values and improving the reliability of the product.
  • the coupling grooves 13 are formed on both ends of the E-shaped core part 11, and the protrusions 14 are formed on both ends of the I-shaped core part 12, so that the protrusions 14 are inserted into the coupling grooves 13.
  • protrusions are formed on both ends of the E-shaped core part 11
  • coupling grooves are formed on both ends of the I-shaped core part 12, so that the protrusions are inserted into the coupling grooves.
  • the bobbin 20 around which the coil C is wound has an accommodation hole 21 (See FIG. 5 ) formed on the inner peripheral surface thereof to correspond to the central portion of the E-shaped core part 11, so that the accommodation hole 21 is press-fitted to the central portion of the core 10.
  • the central portion of the E-shaped core part 11 and the accommodation hole 21 of the bobbin 20 desirably come into close contact with each other, without any gap formed by their separation, to prevent generation of noise when the reactor operates.
  • the bobbin 20 has a winding part 22 and edge parts 23 disposed on the outer peripheral surface thereof.
  • the winding part 22 means a portion of the outer peripheral surface of the bobbin 20, where the coil C is wound.
  • the edge parts 23 are located on top and underside of the winding part 22 and extend outwardly from both sides of the winding part 22 to hold the position of the coil C wound around the winding part 22.
  • the widths of the edge parts 23 are determined to allow the distance between both ends of the edge parts 23 to correspond to the central portion of the E-shaped core part 11, so that the edge parts 23 come into close contact with the central portion to prevent generation of noise when the reactor operates and to suppress defective products from being made due to vibrations.
  • the bobbin 20 has a mounting groove 23a formed inwardly from the edge part 23 to mount one end C1 of the coil C wound, as shown in an enlarged portion A of FIG. 3 .
  • one end C1 of the coil C is pre-drawn from the edge part 23 through the mounting groove 23a, it is spaced apart from the other end C2 of the coil C and the bottom of the coil C wound behind (See an area a-a' of FIG. 3A), so that without any short circuit, the coil C can be compactly and systematically wound.
  • the bobbin 20 has a projection 23b formed outwardly from the edge part 23 on which the mounting groove 23a is formed, as shown in an enlarged portion B of FIG. 3 , and one end C1 of the coil C drawn through the mounting groove 23a is wound around the projection 23b and then seated on the outer peripheral surface of the bobbin 20. Accordingly, one end C1 of the coil C is spaced apart from the other end C2 of the coil C and the bottom of the coil C wound behind (See the area a-a' of FIG.
  • the projection 23b has to be formed on the side of the mounting groove 23a so that it can compactly and stably fix one end C1 of the coil C, and further, a fixing groove 23c is formed on the opposite side to the mounting groove 23a with respect to the projection 23b to fix a seating position of one end C1 of the coil C on the outer peripheral surface of the bobbin 20.
  • the fixing groove 23c has a lower depth than the mounting groove 23a so that the thickness of the coil C wound can be considered. That is, the fixing groove 23c has a lower depth by the thickness of the coil C wound than the mounting groove 23a.
  • the bobbin 20 has a guide groove 23d formed on one surface of the edge part 23 on which the mounting groove 23a is formed to guide the mounting position of the other end C2 of the coil C that corresponds to the mounting groove 23a, as shown in an enlarged portion C of FIG. 3 . Accordingly, the other end C2 of the coil C is seated on the outer peripheral surface of the bobbin 20, while being spaced apart from one end C1 of the coil C, thereby suppressing a short circuit and a defective product from being generated.
  • the guide groove 23d is formed on the same surface as the edge part 23 on which the mounting groove 23a is formed so as to perform next wiring, but in this case, the guide groove 23d is spaced apart from the mounting groove 23a to the maximum so as to prevent one end C1 of the coil C from coming into contact with the other end C2 of the coil C.
  • one end C1 and the other end C2 of the coil C are connected correspondingly to lead wires 40 to perform wiring.
  • an insulation sheet 30 is wound around the winding part 22 around which the coil C is wound, and one end C1 and the other end C2 of the coil C are connected to the lead wires 40 on the outside of the insulation sheet 30 by means of soldering, as shown in FIG. 4a .
  • each lead wire 40 is put into the double insulation sheet 30 to completely prevent the short circuit of the coil C from occurring.
  • an insulation tape is wound around the bobbin 20 after the coil C has been wound and connected to the lead wires 40, thereby stably maintaining the structure of the bobbin 20.
  • FIG. 5 is a perspective view showing a bobbin 20 of the reactor for reducing harmonics according to another embodiment of the present invention.
  • mounting grooves 23a are symmetrically formed on one surface of the edge part 23 to mount one end C1 and the other end C2 of the coil C, and electrode pins 40' are located on one surface of the edge part 23 on which the mounting grooves 23a are formed to wind one end C1 and the other end C2 of the coil C drawn from the mounting grooves 23a.
  • one end C1 and the other end C2 of the coil C wound around the electrode pins 40' are connected to the electrode pins 40' by means of soldering.
  • the coil C is directly connected to the substrate by means of the electrode pins 40, thereby enabling the reactor to be more directly located in the substrate.
  • projections 23b are symmetrically formed outwardly from the edge part 23 on which the mounting grooves 23a are formed, and one end C1 and the other end C2 of the coil C pass through the mounting grooves 23a from the outer peripheral surface of the winding part 22 and are wound around the projections 23b and the electrode pins 40 sequentially. After that, one end C1 and the other end C2 of the coil C wound around the electrode pins 40' are connected to the electrode pins 40' by means of soldering.
  • one end C1 and the other end C2 of the coil C are turnedly wound from the bottom of the coil C wound and thus stably spaced apart from the bottom of the coil C wound, thereby preventing a short circuit or a manufacturing failure from occurring.
  • the reactor for reducing harmonics may further include a cover (not shown).
  • the reactor for reducing harmonics includes the cover adapted to surround the outsides of the core 10 and the bobbin 20 to protect the core 10 and the bobbin 20 around which the coil C is wound from the outside. Even though not shown, a band may be additionally needed to fix the reactor to the substrate, and other parts, which are not explained in the description, may be further provided.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP20954219.0A 2020-09-18 2020-09-21 Reaktor zur reduzierung von oberwellen Pending EP4071775A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020200120622A KR102421178B1 (ko) 2020-09-18 2020-09-18 고조파 저감용 리액터
PCT/KR2020/012700 WO2022059823A1 (ko) 2020-09-18 2020-09-21 고조파 저감용 리액터

Publications (2)

Publication Number Publication Date
EP4071775A1 true EP4071775A1 (de) 2022-10-12
EP4071775A4 EP4071775A4 (de) 2024-01-24

Family

ID=80777045

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20954219.0A Pending EP4071775A4 (de) 2020-09-18 2020-09-21 Reaktor zur reduzierung von oberwellen

Country Status (4)

Country Link
EP (1) EP4071775A4 (de)
KR (1) KR102421178B1 (de)
CN (1) CN114902358A (de)
WO (1) WO2022059823A1 (de)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1657170A (en) * 1970-06-19 1970-10-08 Philips Industries Limited Inductive devices
GB1326566A (en) * 1970-07-24 1973-08-15 Plessey Co Ltd Wound electrical components
KR19990017745A (ko) 1997-08-25 1999-03-15 최진호 모터의 고조파전류 감쇄장치
JP2001035732A (ja) * 1999-07-21 2001-02-09 Tdk Corp スイッチングレギュレータ用トランス
JP4191097B2 (ja) * 2004-06-14 2008-12-03 株式会社タムラ製作所 コイルボビンおよびトランス
KR200367482Y1 (ko) * 2004-08-05 2004-11-10 주식회사 삼립전기 트랜스포머의 코어
JP4888843B2 (ja) * 2009-08-24 2012-02-29 Ｔｄｋ株式会社 トランス
KR100996979B1 (ko) 2010-04-19 2010-11-26 국제통신공업 주식회사 무정전전원장치용 분말자성 블록코아 리액터 및 그 제조방법
KR101123996B1 (ko) * 2010-08-11 2012-03-27 삼성전기주식회사 트랜스포머 및 이를 구비하는 디스플레이 장치
CN110931223A (zh) * 2018-09-20 2020-03-27 株式会社田村制作所 线圈器件
KR102069450B1 (ko) * 2018-11-02 2020-01-22 (주)티에스이 인버터 냉장고에 적용 가능한 리액터

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Publication number Publication date
KR102421178B1 (ko) 2022-07-14
KR20220037758A (ko) 2022-03-25
WO2022059823A1 (ko) 2022-03-24
CN114902358A (zh) 2022-08-12
EP4071775A4 (de) 2024-01-24

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