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CN-122029409-A - Evaluation device and evaluation method

CN122029409ACN 122029409 ACN122029409 ACN 122029409ACN-122029409-A

Abstract

An evaluation device (100) evaluates vibration of the magnetic material. The evaluation device (100) is provided with a magnetic core (10), a plurality of winding sections (20), and first measurement devices (31, 32, 33). The core (10) is made of a magnetic material. The magnetic core (10) includes a post (11). The winding sections (20) are arranged with a gap (G) in the axial direction of the column sections (11), and are attached to the column sections (11) such that the column sections (11) are exposed from the gap (G). The winding part (20) is configured to excite the magnetic core (10) by energizing. The first measuring devices (31, 32, 33) measure vibrations of the column (11).

Inventors

  • KAWAMURA YUSUKE
  • MOGI TAKASHI
  • Kinjo Masato

Assignees

  • 日本制铁株式会社

Dates

Publication Date
20260512
Application Date
20240716
Priority Date
20231017

Claims (14)

  1. 1. An evaluation device for evaluating vibration of a magnetic material, wherein, The evaluation device is provided with: A magnetic core composed of the magnetic material, the magnetic core including a pillar portion; a plurality of winding portions arranged with a gap in an axial direction of the column portion and attached to the column portion so as to expose the column portion from the gap, the plurality of winding portions configured to excite the magnetic core by energizing, and And a first measuring device that measures vibration of the column.
  2. 2. An evaluation device for evaluating vibration of a magnetic material, wherein, The evaluation device is provided with: A plurality of winding parts arranged with a gap in the axial direction, the plurality of winding parts being attachable to the leg parts of the magnetic core made of the magnetic material, and And a first measuring device for measuring vibration of the column.
  3. 3. The evaluation device according to claim 1 or 2, wherein, The plurality of windings respectively include exciting coils through which exciting currents flow.
  4. 4. The evaluation device according to claim 1 or 2, wherein, The evaluation device further includes a jig disposed on the column portion at the gap, and the jig is configured to fix the column portion to the evaluation device.
  5. 5. The evaluation device according to claim 4, wherein, The jig has a notch portion formed on a surface opposite to the column portion, penetrating the jig in the axial direction.
  6. 6. The evaluation device according to claim 1 or 2, wherein, The first measuring device is a laser doppler vibrometer.
  7. 7. The evaluation device according to claim 1 or 2, wherein, The evaluation device is provided with a plurality of first measuring devices, The first measuring devices are each configured to be able to adjust a position relative to the column.
  8. 8. The evaluation device according to claim 1 or 2, wherein, The evaluation device is configured to adjust an excitation waveform based on output waveform information prepared in advance, and to energize the winding section in accordance with the excitation waveform.
  9. 9. The evaluation device according to claim 1 or 2, wherein, The evaluation device further includes a second measurement device that measures, for the magnetic core, information different from the information measured by the first measurement device.
  10. 10. The evaluation device according to claim 1 or 2, wherein, The evaluation device is configured to excite the magnetic core while changing excitation conditions, and the vibration of the column is measured by the first measurement device under each excitation condition.
  11. 11. The evaluation device according to claim 1 or 2, wherein, The evaluation device is provided with two first measuring devices, The first measuring device is capable of irradiating laser light to the measuring point of the column portion from different directions, A light shielding plate for preventing interference of the laser light irradiated from one of the first measuring devices with the laser light irradiated from the other of the first measuring devices is provided between an irradiation path of the laser light from the one of the first measuring devices to the measuring point and an irradiation path of the laser light from the other of the first measuring devices to the measuring point so as to be adjacent to the measuring point.
  12. 12. An evaluation method for evaluating vibration of a magnetic material, wherein, The evaluation method comprises the following steps: preparing a magnetic core composed of the magnetic material and including a post, and a plurality of winding portions arranged with a gap in an axial direction of the post and attached to the post so that the post is exposed from the gap, and The magnetic core is excited by energizing the winding portion, and vibration of the column portion is measured by a measuring device.
  13. 13. The evaluation method according to claim 12, wherein, In the measuring step, vibration of the column is measured from the gap by the measuring device.
  14. 14. The evaluation method according to claim 12, wherein, The magnetic core includes three of the leg portions to which the plurality of winding portions are respectively mounted, And changing the connection mode of the winding parts between the column parts.

Description

Evaluation device and evaluation method Technical Field The present disclosure relates to an evaluation device and an evaluation method for evaluating vibration of a magnetic material. Background It is known that when a magnetic material is magnetized, a phenomenon such as magnetostriction occurs in which the size of the magnetic material changes according to the intensity of a magnetic field. For example, in a device such as a transformer, an alternating current flows through an exciting coil, and an alternating magnetic field is generated in a core made of a magnetic material, so that magnetostriction (expansion/contraction) generated in the core also periodically fluctuates. Such magnetostriction phenomenon may become a main cause of vibration of the magnetic core. Vibration and noise may occur in a device on which the magnetic core is mounted due to the vibration of the magnetic core. By evaluating vibration of a magnetic material constituting a magnetic core, a device that reduces noise can be proposed. For example, non-patent document 1 discloses measuring vibration of a magnetic core in order to analyze an influence of a magnetic material on noise of a transformer. In non-patent document 1, for a model transformer having a three-phase three-leg magnetic core, vibration of a yoke of the magnetic core and a joint portion of the yoke and the leg portion is measured by a laser doppler vibrometer. Patent document 1 also discloses measuring vibration of a magnetic material by a laser doppler vibrometer. In patent document 1, for example, a laser beam from a laser doppler vibrometer is irradiated to a reflector on a magnetic material to measure the displacement of the magnetic material. The reflector is disposed on the magnetic material at a position adjacent to the winding portion. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 7-270509 Non-patent literature Non-patent document 1, kangsha Chengsi and others, "Transformer characteristic analysis technique of JFE Steel", JFE technical report, JFE Steel Co., ltd., no.36, p.17-23, month 8 of 2015 Disclosure of Invention Problems to be solved by the invention In non-patent document 1 and patent document 1, vibration of a core is measured outside a winding portion. In each document, vibration is not measured at a leg portion of the magnetic core, that is, at a portion where the winding portion is mounted. However, it is assumed that particularly large vibrations may occur in the column portion due to, for example, magnetization of the winding portion, interaction of a current flowing in the winding portion and a magnetic field generated in the column portion. Therefore, if the vibration of the column portion can be measured, it is considered that it is easier to propose a device that reduces noise. The present disclosure provides an evaluation device capable of measuring vibration of a column portion to which a winding portion is attached. Solution for solving the problem The evaluation device of the present disclosure evaluates vibration of the magnetic material. The evaluation device includes a magnetic core, a plurality of winding portions, and a first measurement device. The core is composed of a magnetic material. The magnetic core includes a post portion. The winding portions are arranged with a gap in an axial direction of the column portion, and are attached to the column portion so that the column portion is exposed from the gap. The winding part is configured to excite the magnetic core by energizing. The first measuring device measures the vibration of the column. ADVANTAGEOUS EFFECTS OF INVENTION According to the evaluation device of the present disclosure, the vibration of the column portion to which the winding portion is attached can be measured. Drawings Fig. 1 is a plan view showing the main configuration of an evaluation device according to an embodiment. Fig. 2 is a side view of the evaluation device shown in fig. 1. Fig. 3 is an exploded perspective view showing the structures of the core, the winding portion, and the support frame included in the evaluation device shown in fig. 1 and 2. Fig. 4 is a flowchart for explaining the evaluation method according to the embodiment. Fig. 5 is a plan view showing the main structure of the evaluation device according to the modification. Fig. 6 is a plan view showing the main configuration of the evaluation device according to the modification. Fig. 7 is a perspective view showing the structure of the winding portion included in the evaluation device according to the modification. Detailed Description The evaluation device of the embodiment evaluates vibration of the magnetic material. The evaluation device includes a magnetic core, a plurality of winding portions, and a first measurement device. The core is composed of a magnetic material. The magnetic core includes a post portion. The winding portions are arranged with a gap in an axial direction of the column p