CN103578688A - Inductance element provided with permanent magnet bias magnet and bypass magnetic core - Google Patents

Inductance element provided with permanent magnet bias magnet and bypass magnetic core Download PDF

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Publication number
CN103578688A
CN103578688A CN 201210253435 CN201210253435A CN103578688A CN 103578688 A CN103578688 A CN 103578688A CN 201210253435 CN201210253435 CN 201210253435 CN 201210253435 A CN201210253435 A CN 201210253435A CN 103578688 A CN103578688 A CN 103578688A
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magnetic
air gap
permanent magnet
magnet
coil
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CN 201210253435
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Chinese (zh)
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伍家驹
梅开行
王长坤
刘斌
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南昌航空大学
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Abstract

An inductance element having a permanent magnet bias magnet and a bypass magnetic core comprises a coil, a magnetic core provided with at least one air gap inside the coil, partial bypass soft magnets which are form into the air gap together and a permanent magnet which is in series connection on lateral side of the air gap. According to the inductance element, the coil wraps the magnetic core; at least one air gap is formed in the magnetic core; magnetic core portions, which are close to the air gap, are in series connection with partial bypass soft magnet portions which are provided with the air gap; the permanent magnet is in series connection with an air gap opening, so that the coil magnetic branched circuit, the air gap magnetic branched circuit and the permanent magnet magnetic branched circuit are formed; the permanent magnet for the inductance element performs reverse pre-magnetic-biasing on the coil magnetic branch circuit and the output magnetic energy product of the permanent magnet is adjusted according to the size of the air gap; the direct current component of the coil current and magnetic flux density superposed through synclastic pre-magnetic-biasing of the permanent magnet are reduced, the disadvantages that in a traditional permanent magnet bias magnetic inductance element, magnetic flux density of a synthetic pre-magnetic-biasing branch is increased and inductance value is decreased, the inductance value and power density of the inductance element under certain direct current bias current are improved due to the fact that the length of partial bypass soft magnets is one fifth of the length of a main magnetic circuit.

Description

具有永磁偏磁和旁路磁芯的电感元件 An inductance element having a permanent bias magnetic core and bypass

技术领域 FIELD

[0001 ] 本发明涉及一种具有永磁偏磁和旁路磁芯的电感元件,适合应用于电感元件线圈工作电流有较大直流分量的情况。 [0001] The present invention relates to a permanent magnet bias magnetic core and shunt inductance element, the inductance element is suitable when applied to coil operating current larger DC component.

背景技术 Background technique

[0002] 功率电感元件在电力电子电路中得到广泛的应用,但其工作线圈电流中常含有的直流分量会使磁芯饱和,大大降低电感量,从而增大电磁干扰、降低整机性能,甚至造成设备故障。 [0002] The inductance element power has been widely used in power electronic circuits, but its operating coil current DC component contained often saturate the core, the inductance is greatly reduced, thereby increasing the electromagnetic interference, reducing overall performance and even cause Equipment failure.

传统的防止功率电感元件因磁芯直流偏磁而导致电感下降的主要措施及其缺点有: 措施1:在构成主磁路的软磁芯上预留气隙 Traditional power inductor element by preventing DC bias magnetic core main measures resulting decrease in inductance and disadvantages are: Measure 1: Reserved soft magnetic core constituting the air gap of the main magnetic flux path

缺点:预留的气隙过小则防止直流偏磁的效果有限,气隙过大则会大大降低电感元件的电感量。 Disadvantages: reserved to prevent the air gap is too small, the effect of finite DC bias, the air gap is too large will greatly reduce the inductance of the inductance element.

措施2:在构成主磁路的软磁芯上预留的气隙中塞进永磁体缺点:永磁和电磁串联,主回路的过电流会导致永磁体退磁。 Measure 2: On the soft magnetic core constituting the air gap main magnetic flux path in the reservation into permanent disadvantages: a series of permanent and electromagnetic overcurrent will cause the main circuit of the permanent magnet demagnetization.

措施3:在构成主磁路的软磁芯上预留的气隙两端并联永磁体。 Measure 3: both ends of the soft magnetic core constituting the air gap main magnetic flux path of the permanent magnet in parallel reserved.

缺点:永磁体产生的磁通是单向闭合的,将其预置在电感元件的闭合主磁路上会同时产生同向预偏磁和反向预偏磁,虽然反向预偏磁支路能减小磁芯截面积,但总体效果却被同向预偏磁磁支路磁通密度增加而带来的危害所抵消的缺点。 Disadvantages: the permanent magnet magnetic flux is unidirectional closed, which produces the same preset to the pre-bias magnet and reverse biasing magnetic pre simultaneously closing the main magnetic circuit of the inductance element, although the reverse branch can pre-bias magnet reducing the cross sectional area of ​​the core, but the overall effect was increased with the disadvantages of harm to the pre-offset bias magnetic flux density of the magnetic legs.

发明内容 SUMMARY

[0003] 本发明的目的是一种具有永磁偏磁和旁路磁芯的电感元件,该发明能够有效地提高磁芯抗偏磁能力,提高电感元件电感量和功率密度。 [0003] It is an object of the present invention having a permanent magnet bias magnetic core and shunt inductance element, the invention can effectively increase the anti-bias magnet core capacity, inductance and the inductance element to improve power density.

[0004] 本发明的解决方案是:一种具有永磁偏磁和旁路磁芯的电感元件,包括线圈、线圈中至少有一个气隙的磁芯、共同构成气隙的局部旁路软磁体和并联在气隙侧面的永磁体。 [0004] The solution of the invention is: A permanent bias magnet having a magnetic core and shunt inductance element, comprising a coil, the coil core has at least one air gap, the air gap together constitute a partial bypass soft magnetic material and the parallel sides of the air gap in the permanent magnet. 所述电感元件中,磁芯上绕有线圈,磁芯中至少有一个气隙,气隙附近的磁芯并联着同样含有气隙的局部旁路软磁体,气隙端口并联有永磁体,分别形成线圈磁支路、气隙磁支路和永磁体磁支路。 Said inductance element, a coil wound on the magnetic core, at least one air gap in the core, the core near the air gap in parallel with the same soft magnetic material containing a partial bypass air gap, the air gap a permanent magnet parallel port, respectively, forming a magnetic coil branch, branch and the permanent magnet magnetic air gap magnetic leg. 该电感元件的永磁体可以对线圈磁支路的软磁体进行反向的预偏磁,气隙支路可以通过气隙的大小来调节永磁体外磁路磁阻提高永磁体输出磁能积。 The permanent magnets of the inductor element may be pre-reverse biasing magnetic soft magnetic magnet coil branch, branch air gap a permanent magnet may be adjusted to improve the magnetic resistance in vitro output energy product permanent magnet through the air gap size. 本发明的技术特点是同向偏磁局部旁路软磁体长度不到主磁路长度的五分之一,既可降低由于线圈工作电流直流分量和永磁体同向预偏磁所同向叠加的磁芯磁通密度,又可克服传统永磁预偏磁元件中,虽然反向预偏磁支路能减小磁芯截面积,但总体效果却被同向预偏磁磁支路磁通密度增加而带来的危害所抵消的缺点,提高一定直流偏磁电流下电感元件的电感量和电感元件的功率密度。 Technical features of the present invention is one of the main magnetic flux path with a length less than the length of the soft magnetic bias magnet fifth partial bypass, the coil can reduce the operating current and the direct current component superimposed on the permanent magnet in the same direction with the pre-bias magnet core flux density, but also to overcome the traditional pre-biasing the permanent magnetic element, although the pre-reverse biasing magnetic core leg cross-sectional area can be reduced, but the overall effect was the same density of the pre-leg bias magnet magnetic flux increasing harm offset the disadvantages, increasing the power density and the inductance of the inductance element of the inductance element at a certain DC bias current.

[0005] 本发明的优点在于:可降低由于线圈工作电流直流分量导致的磁芯饱和,增大一定直流偏磁电流下的电感量,提高电感元件的功率密度;同时可以通过气隙来调整永磁体的工作点接近于最大磁能积,通过调整同向偏磁局部旁路软磁体长度和截面来限制永磁体磁压,防止永磁体被脉冲电流退磁并减小损耗。 [0005] The advantage of the present invention is that: the magnetic core can be reduced since the coil operating current DC component due to saturation, the inductance constant increases the DC bias current to improve the power density of the inductive element; the same time can be adjusted by an air gap permanent the operating point close to the maximum energy product of the magnet, the permanent magnet is restricted by adjusting the magnetic pressure with the soft magnetic bias magnet length and cross-sectional partial bypass to prevent the permanent magnets are demagnetized and reduce the pulse current losses.

附图说明 BRIEF DESCRIPTION

[0006] 图1为本发明的第一种方案结构示意图图2为图1的磁路不意图 [0006] FIG. 1 a first embodiment of the present invention is a schematic structural diagram of the magnetic circuit 2 of Figure 1 is not intended to

图3为本发明的第二种方案结构示意图图4为图3的磁路不意图图5为本发明的第三种方案结构示意图图6为图5的磁路不意图 FIG 3 a second embodiment of the present invention is a schematic structural diagram of a magnetic circuit 4 of FIG. 3 is not intended to FIG. 5 a third embodiment of the present invention. FIG. 6 is a schematic structural diagram of a magnetic circuit of Figure 5 is not intended to

具体实施方式 detailed description

[0007] 以下结合附图详细说明本发明的具体实施方式 Detailed Description [0007] The accompanying drawings in conjunction with the following specific embodiments of the present invention.

[0008] 如图1和图3所示,本发明的具有永磁偏磁和旁路磁芯的电感元件,包括线圈1、线圈中至少有一个气隙的磁芯2、共同构成气隙3的局部旁路软磁体4,软磁垫片5和永磁体6。 [0008] FIGS. 1 and 2, the inductance element having a permanent bias magnetic core bypass and 3 of the invention, comprising a coil, the coil in the air gap of a magnetic core at least 2, 3 together form an air gap 4 a partial bypass soft magnetic material, soft pad 5 and the permanent magnet 6.

[0009] 如图5所示,实施例3除了包括线圈1、线圈中至少有一个气隙的磁芯2、共同构成气隙3的局部旁路软磁体4,软磁垫片5和永磁体6,还加有避免气隙磁芯与永磁直接接触的塑料垫片10。 [0009] 5, except that Example 3 including a coil, the coil has at least one air gap in the magnetic core 2, 3 constitute an air gap of a soft magnetic partial bypass 4, 5 and the permanent magnet soft pad 6, also supplied with plastic spacers 10 prevent direct contact with the permanent air gap in the magnetic core.

[0010] 所述永磁体产生磁通与电流通过线圈时在磁芯中产生的磁通相叠加,在线圈磁支路永磁体产生磁通与电流通过线圈时在磁芯中产生的磁通方向相反构成反向预偏磁,在气隙支路永磁体产生磁通与电流通过线圈时在磁芯中产生的磁通方向相同构成同向预偏磁。 [0010] The magnetic flux generated by the permanent magnetic flux in the magnetic core of the current generated by the coil is superimposed on the current generating a magnetic flux direction of magnetic flux generated by the coil in the core of magnetic coil branch permanent magnet reverse bias magnet constituting the pre-contrast, the air gap magnetic flux generated by the permanent branch current of the same direction by the magnetic flux generated by the coil in the core to the pre-configured with the magnetic bias.

[0011] 本发明将永磁体产生磁通8、9与电流通过线圈时在磁芯中产生的磁通7相叠加,形成如图2、图4、图6所示的3个磁通,即线圈磁通Φ。 [0011] The present invention is a magnetic flux generated by the permanent magnetic flux 8 and 9 in the core of the current generated by the coil 7 is superimposed on the magnetic flux formed three in FIG. 2, FIG. 4 and FIG. 6, i.e., coil flux Φ. ,气隙磁通Φ8和永磁体磁通Oni,并通过对磁芯2、气隙3、局部旁路软磁体4,软磁垫片5和永磁体6的材料及其尺度优化设计来趋利避害。 Gap magnetic flux and permanent magnet flux Φ8 Oni, and through the core 2, the air gap 3, 4 partial bypass soft magnetic material, the soft magnetic material and the permanent magnet shims 5 and 6 of the scale designed to optimize the benefits or reduce avoid its evils. 对Φ。 For Φ. 所在的线圈支路由于永磁体产生的预偏磁磁通与线圈中直流电流分量产生的单向磁通方向相反,故减小磁芯截面积以提高功率密度;对巾8所在的气隙支路由于永磁体产生的预偏磁磁通与线圈中直流电流分量产生的单向磁通方向相同,故增大磁芯截面积以减小磁通密度、并以局部旁路软磁体4长度不到主磁路长度的五分之一的形式来控制其局部的体积增加,达到提高一定直流偏磁电流下电感元件的电感量和电感元件的功率密度的目的;对Φπ所在的永磁体支路,由于所采用的稀土烧结永磁体的磁导率近似于空气,永磁体磁通向的尺度大于气隙、贝1J线圈中交流电流分量产生的双向交流磁通绝大多数通过综合磁导率更低的气隙支路,从而避免永磁体被退磁减少永磁体交流损耗。 Unidirectional magnetic fluxes opposite direction of the coil leg in an area where the pre-bias magnetic flux in the coil generates direct current component generated by the permanent magnets, the magnetic core is reduced so that the cross-sectional area to increase the power density; air gap 8 where the branched towel the same way the magnetic flux direction of the magnetic flux path due to the pre-biasing coil in a DC current component generated by the permanent magnets, the magnetic core is increased so as to reduce the cross-sectional area of ​​the magnetic flux density and soft magnetic material to locally bypass length 4 to form one-fifth of the length of the main magnetic flux path is controlled to increase its local volume purpose of improving the power density and the inductance of the inductance element of the inductance element at a certain DC bias current; branch of the permanent magnet is located Φπ Since the magnetic permeability of the rare earth sintered permanent magnet used similar to the air, the scale is larger than the permanent magnet flux to the air gap, two-way communication flux coil shell 1J alternating current component generated by the vast majority of integrated magnetic permeability more low air gap branch, in order to avoid demagnetization of the permanent magnets are permanent magnets to reduce the AC losses.

[0012] 本发明磁芯材料采用冷轧硅钢片,但不限于此。 Core Material [0012] The present invention is cold-rolled silicon steel sheet, but is not limited thereto. 也可采用其它软磁材料。 Other soft magnetic material may also be employed.

[0013] 本发明磁芯结构采用基本的“口”型,但不限于此。 [0013] using the basic core structure of the present invention, the "mouth" type, but is not limited thereto. 也可采用其它结构。 Other structures may also be employed.

[0014] 本发明永磁体采用钕铁硼,但不限于此。 Permanent magnet [0014] The present invention NdFeB, but is not limited thereto. 也可采用其它永磁体磁。 Other permanent magnet may also be employed.

[0015] 本发明电感元件以电感器为例,但不限于此。 [0015] In the inductance element of the present invention, an inductor as an example, but is not limited thereto. 也可用于有直流分量的电感元件,如变压器,多线圈变压器、多线圈电感器和多输出电感器等。 It can also be used with a DC component of the inductance element, such as transformers, multi-winding transformers, multi-coil inductor and multiple output inductors.

Claims (4)

  1. 1.一种具有永磁偏磁和旁路磁芯的电感元件,包括线圈、线圈中至少有一个气隙的磁芯、共同构成气隙的局部旁路软磁体和并联在气隙侧面的永磁体。 A permanent biasing magnet having a magnetic core and shunt inductance element, comprising a coil, the coil has at least one air gap of a magnetic core, together constitute a partial bypass air gap a permanent magnet and a soft side of the air gap are connected in parallel magnet. 所述电感元件中,磁芯上绕有线圈,磁芯中至少有一个气隙,气隙附近的磁芯并联着同样含有气隙的局部旁路软磁体,气隙端口并联有永磁体,分别形成线圈、气隙和永磁体三个磁支路。 Said inductance element, a coil wound on the magnetic core, at least one air gap in the core, the core near the air gap in parallel with the same soft magnetic material containing a partial bypass air gap, the air gap a permanent magnet parallel port, respectively, forming the coil, the air gap and the permanent magnet three branches thereof.
  2. 2.根据权利要求1所述的具有永磁偏磁和旁路磁芯的电感元件,其特征在于:气隙附近的磁芯并联着同样含有气隙的旁路软磁体。 The inductance element having a permanent bias magnet and a bypass magnetic core according to claim 1, wherein: the magnetic core near the air gap in parallel with the bypass air gap also contains soft magnetic material.
  3. 3.根据权利要求1或2所述的具有永磁偏磁和旁路磁芯的电感元件,其特征在于:永磁体可以对线圈磁支路的软磁体进行反向的预偏磁,气隙支路可以通过气隙的大小来调节永磁体外磁路磁阻提高永磁体输出磁能积。 The inductance element having a permanent bias magnetic core and bypass claim 1 or claim 2, wherein: the permanent magnet may be reversed pre soft magnetic bias magnet coils of the magnetic legs, an air gap vitro permanent branch may be adjusted to increase the output energy product of magnetic resistance of the permanent magnet by the size of the air gap.
  4. 4.根据权利要求1或2或3所述的具有永磁偏磁和旁路磁芯的电感元件,其特征在于:局部旁路软磁体长度不到主磁路长度的五分之一,局部旁路软磁体可以降低由于线圈工作电流直流分量和永磁体同向预偏磁所同向叠加的磁芯磁通密度。 The inductance element having a permanent bias magnet and a bypass magnetic core 1 or claim 2 or claim 3, wherein: less than one, the local soft magnet length partially bypass the main magnetic path length of the fifth bypass soft magnetic core flux density can be reduced due to the superposition of the operating current of the coil and the permanent magnet with the direct current component of the same to the pre-bias magnet.
CN 201210253435 2012-07-20 2012-07-20 Inductance element provided with permanent magnet bias magnet and bypass magnetic core CN103578688A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106057395A (en) * 2016-08-16 2016-10-26 福州大学 Permanent magnet biased magnetic element assembly and method for implementing same

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JPS57126110A (en) * 1981-01-29 1982-08-05 Tdk Corp Inductance element
CN1354485A (en) * 2000-11-20 2002-06-19 株式会社东金 Inductance coil element of permanent magnet near magnetic gap
JP2007281204A (en) * 2006-04-07 2007-10-25 Yaskawa Electric Corp Dc reactor
CN201732654U (en) * 2010-03-22 2011-02-02 福州大学 Permanent-magnet bias magnetic element
US20120139375A1 (en) * 2009-07-16 2012-06-07 Toru Masuzawa Magnetic levitation control device and hybrid type magnetic bearing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57126110A (en) * 1981-01-29 1982-08-05 Tdk Corp Inductance element
CN1354485A (en) * 2000-11-20 2002-06-19 株式会社东金 Inductance coil element of permanent magnet near magnetic gap
JP2007281204A (en) * 2006-04-07 2007-10-25 Yaskawa Electric Corp Dc reactor
US20120139375A1 (en) * 2009-07-16 2012-06-07 Toru Masuzawa Magnetic levitation control device and hybrid type magnetic bearing
CN201732654U (en) * 2010-03-22 2011-02-02 福州大学 Permanent-magnet bias magnetic element

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106057395A (en) * 2016-08-16 2016-10-26 福州大学 Permanent magnet biased magnetic element assembly and method for implementing same

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