• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An inductor comprises a magnetic core (2) which forms a closed loop path for a magnetic flux, the magnetic core (2) having a high-permeance element (4) interrupted by a low-permeance gap (6), having the low-permeate gap (6) having an inner portion (61) and an outer portion (62), the distance between a center (41) of the magnetic core (2) and the outer portion (62) being greater than a distance between the center (41) of the magnetic core (2) and the inner portion (61), and a conductor (8) wrapped around the magnetic core (2). The inner portion (62) of the low-permeance gap (6) has a substantially larger dimension in a circumferential direction than the outer portion (62) of the low-permeance gap (6).
    公开号:DK201500059U1
    申请号:DK201500059U
    申请日:2015-04-29
    公开日:2015-04-29
    发明作者:Radoslaw Jez；Wojciech Jurczak
    申请人:Abb Research Ltd；
    IPC主号:
    专利说明:

    Title: Inductor
    Scope of production
    The production relates to an inductor according to the preamble of independent claim 1.
    A known inductor comprises a magnetic core and a conductor wound around the magnetic core. The magnetic core forms a closed loop path for a magnetic flux and has a high-permeance element interrupted by a low-permeance gap.
    One of the problems associated with the known inductor is that the reluctance of the magnetic path of the inductor is not uniform for each part of the cross-section of the magnetic core. The value of the magnetic path reluctance grows as the distance from the center of the inductor increases. The variable length of the magnetic path causes variable reluctance values and non-uniform distribution of the magnetic flux density. The highest value of the magnetic flux density occurs in an inner part of the magnetic path, while the lowest value of the magnetic flux density occurs in an outer part of the magnetic core. This implies that the inner part of the magnetic core will be saturated before the outer part and that it is not possible to use the full potential of the magnetic core.
    Brief description of the production
    The object of the present invention is to provide an inductor which addresses the aforementioned disadvantages. The object of the invention is achieved by means of an inductor which is peculiar to that set forth in the independent claim. Preferred embodiments of the invention are apparent from the dependent claims.
    The generation is based on the idea that a low-permance gap of a magnetic core is formed as a non-uniform gap, the uniform gap being wider within the inner portion of the magnetic core than within an outer portion thereof. magnetic core. The wider gap in the inner portion of the magnetic core has a higher reluctance than the narrower gap in the outer portion of the magnetic core. Due to the non-uniform low-permance gap, a reluctance in the magnetic path of an inductor can be constructed substantially uniform for each portion of a magnetic core's cross-section.
    An advantage of the inductor according to the invention is that the non-uniform gap reduces the problem of saturation in the inner part of the magnetic core by providing more uniform distribution of the magnetic flux density. The generation also opens up the possibility of a growing power density in connection with an inductor.
    DETAILED DESCRIPTION OF THE PRODUCT In the following, the production will be described in more detail by means of preferred embodiments with reference to Figure 1, which shows an inductor according to an embodiment of the production. This inductor comprises a magnetic core 2 and a conductor 8 which is wound around the magnetic core 2. The conductor 8 is electrically insulated against the magnetic core 2. An electric current present in the conductor 8 produces a magnetic field around the conductor 8 The magnetic core 2 forms a closed loop path for a magnetic flux, the magnetic core 2 having a high-permeance element 4 interrupted by a low-per-means slot 6.
    The low-permeate slot 6 has an inner portion 61 and an outer portion 62, a distance between a center 41 of the magnetic core 2 and the outer portion 62 being greater than a distance between the center 41 of the magnetic core 2 and the inner portion. 61. The inner portion 61 of the low-permeance gap 6 has a substantially larger dimension in a circumferential direction than the outer portion 62 of the low-permeance gap 6. The circumferential direction is a direction perpendicular to a radial direction of the magnetic core 2. .
    The surfaces 46 and 48 of the high-permean element 4, which delimit the low-permeance gap 6, are substantially planar surfaces. A gap angle α between the surfaces 46 and 48 is 20 °. The surfaces 46 and 48 are located symmetrically with respect to the radial direction 42 of the magnetic core 2. The radial direction 42 of the magnetic core 2 bisects the slit angle a.
    One dimension of the inner portion 61 of the low permeance gap 6 in the circumferential direction is approx. four times as large as a dimension of the outer portion 62 of the low-permeance slot 6 in the circumferential direction. In other words, the inner part 61 is approx. 300% wider than the outer part.
    The shape of a non-uniform low permeance gap varies depending on the embodiment. In an alternate embodiment, a slit angle between the high-permeance element delimiting the low-permeance gap is 10 °, and a dimension of the inner portion of the low-permeance gap in the circumferential direction is twice as large. a dimension of the outer portion of the low-permeance gap in the circumferential direction.
    The material of the high-permeance element 4 comprises ferrite, and the material of the low-permeance gap 6 comprises air. In an alternative embodiment, the high-permeance element material may comprise iron powder, amorphous material, oriented steel or non-oriented steel, and the low-permeance gap material may include resin, plastic or carbon fibers. Typical materials for the high-permeance element and the low-permeance gap are selected such that the high-permeance element material has a permeability at least ten times greater than the permeability of the low-permeance material.
    The inductor of Figure 1 is a toroidal inductor. The magnetic core 2 is an annular magnetic core. The annular magnetic core takes the form of a massive rotation. The toroidal shape provides a high value inductance and decreasing leakage flux. However, the non-uniform low-permeability gap can be incorporated into any inductor whose magnetic core forms a closed loop path for a magnetic flux and has a high-permeance element interrupted by a low-permeance gap. .
    The conductor 8 has seven turns and its ends 81 and 82 are in the vicinity of the low-permeance slot 6, positioned on either side thereof. The conductor's number of turns is selected based on a desired inductance. Therefore, the number of leader turns varies in different embodiments. In addition, the location of the ends of the conductor may be selected based on the requirements of one embodiment.
    The magnetic core of the inductor of Figure 1 has a low-permeance gap. Alternatively, a low-permeance slit may be divided into several low-permeance slice sections. An inductor according to the invention may have one or more low-permeability slots whose inner portion has a substantially larger dimension in a circumferential direction than the outer portion. An inductor according to the invention can further comprise one or more conventional low-permeability slots, the inner and outer parts having substantially the same dimensions in a circumferential direction.
    It will be obvious to one skilled in the art that the concept of production can be implemented in various ways. The production and its embodiments are not limited to the examples described above, but may vary without departing from the scope of the claims.
    权利要求:
    Claims (9)
    [1]
    An inductor comprising: a magnetic core (2) which forms a closed loop path for a magnetic flux, the magnetic core (2) having a high-permeance element (4) interrupted by a low-permeance slot (6), the low-permance slot (6) having an inner portion (61) and an outer portion (62), the distance between a center (41) of the magnetic core (2) and the outer portion (62) ) is greater than a distance between the center (41) of the magnetic core (2) and the inner portion (61), and the inner portion (61) of the low-permeance gap (6) has a substantially larger dimension in a circumferential direction. than the outer portion (62) of the low-permeance gap (6), and a conductor (8) wrapped around the magnetic core (2), which is new in that the low-permeance gap (6) extends through the magnetic core (2) in a radial direction (42) for the magnetic core (2).
    [2]
    The inductor of claim 1, which is new in that the surfaces (46, 48) of the high-permeance element (4) defining the low-permeance gap (6) are substantially planar surfaces.
    [3]
    The inductor of claim 2, which is new in that a slit angle (a) between the surfaces (46, 48) of the high-permeance element (4) defining the low-permeance gap (6) is at least 10 °.
    [4]
    The inductor of claim 2 or 3, which is new in that the surfaces (46, 48) of the high-permeance element (4) defining the low-permeance gap (6) are symmetrically positioned relative to the magnetic core. (2) radial direction.
    [5]
    An inductor according to any one of the preceding claims, which is new in that a dimension associated with the inner portion (61) of the low-permeate gap (6) in the circumferential direction is at least twice that of a dimension thereof. outer portion (62) of the low-permeance slot (6) in the circumferential direction.
    [6]
    An inductor according to any one of the preceding claims, which is new in that the permeability of the material of the high-permeance element (4) is at least ten times greater than the permeability of the material of the low-permeance gap (6).
    [7]
    The inductor of claim 6, which is new in that the material of the low-permeate gap (6) comprises air, resins, plastics or carbon fibers.
    [8]
    The inductor according to claim 6 or 7, which is new in that the material of the high permeance element (4) comprises ferrite, iron powder, amorphous material, oriented steel or non-oriented steel.
    [9]
    An inductor according to any one of the preceding claims, which is new in that it is a toroidal inductor and that the magnetic core (2) is an annular magnetic core.
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    同族专利:
    公开号 | 公开日
    DK201500059Y3|2015-06-12|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DK201500059|2015-04-29|
    DK201500059U|DK201500059Y3|2015-04-29|2015-04-29|Magnetic core inductor|DK201500059U| DK201500059Y3|2015-04-29|2015-04-29|Magnetic core inductor|
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