Heating device for stator

Abstract

To provide a heating device for a stator capable of suppressing thermal deformation and overheating at the time of heating in the stator installed with winding.SOLUTION: A heating device 1 for a stator on which winding is installed, includes an induction heating coil 100 provided on at least one of an inner wall portion 12 and an outer wall portion 13 of a core portion 11 of the stator 10, and an annular shielding member 110 provided on an end portion in a lamination direction of the stator and the outer wall portion. Accordingly, it is possible to provide the heating device for the stator that suppresses thermal deformation and overheating during heating in the stator on which a winding is installed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a stator heating device. [Background technology]

[0002] Patent Document 1 discloses a method for manufacturing a stator in which the end of a core of the stator is pressed down by a pressing member, and a jig for manufacturing the stator. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-169400 Summary of the Invention [Problem to be solved by the invention]

[0004] In the stator manufacturing method and stator manufacturing jig disclosed in Patent Document 1, the ends of the stator core are physically pressed down to prevent the steel sheets from bending during induction heating. Also, because magnetic levitation of the steel sheets can be suppressed during induction heating, heat generated at the ends of the steel sheets of the stator core is easily transferred to the electromagnetic steel sheets in the lower layers, preventing abnormal heating of the levitated layers.

[0005] On the other hand, the magnetic flux generated by the winding coils that extend beyond the stator core is more likely to enter the stator core, which is magnetic, than the non-magnetic product coils. Therefore, further improvements are required to suppress heat generation in the stator core.

[0006] The present disclosure has been made to solve such problems, and aims to provide a stator heating device that suppresses thermal deformation and overheating when a stator equipped with windings is heated. [Means for solving the problem]

[0007] The heating device for a stator according to the present disclosure is a heating device for a stator having a winding attached thereto, and includes an induction heating coil provided on at least one of an inner wall portion and an outer wall portion of a core portion of the stator, and an annular shielding member provided on an end portion of the stator in the lamination direction and on the outer wall portion, thereby making it possible to provide a heating device for a stator having a winding attached thereto that suppresses thermal deformation and overheating during heating. [Effects of the Invention]

[0008] The present disclosure can provide a stator heating device that suppresses thermal deformation and overheating of a stator equipped with windings when heated. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a configuration diagram of a stator heating device according to the present disclosure; [Figure 2] 10 is a graph showing the temperature rise of a core portion caused by a stator heating device according to the present disclosure. [Figure 3] 10 is a graph showing the temperature rise of the core portion due to the associated stator heating device. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. Fig. 1 is a configuration diagram of a stator heating device 1 according to the present disclosure. The stator heating device 1 includes an induction heating coil 100 that heats a stator 10, and a shielding member 110 that shields magnetic flux.

[0011] The stator 10 includes a core 11, which has an inner wall 12 and an outer wall 13. The induction heating coil 100 included in the stator heating device 1 is provided on at least one of the inner wall 12 and the outer wall 13 of the core 11 of the stator 10. The stator heating device 1 may include multiple induction heating coils 100, or may be provided on both the inner wall 12 and the outer wall 13 of the core 11 of the stator 10.

[0012] The shielding members 110 are provided on the ends of the stator 10 in the lamination direction and on the outer wall portions 13 of the core portion 11 of the stator 10. The shielding members 110 have an annular shape and shield the magnetic flux that penetrates the stator 10 in the lamination direction. The shielding members 110 contain a metal material that has a magnetic shielding effect, such as copper.

[0013] By providing the shielding member 110, it is possible to suppress abnormal heating of the core portion 11 of the stator 10. In this way, it is possible to provide a stator heating device that suppresses thermal deformation and overheating when heating a stator with windings attached.

[0014] 2 is a graph showing a comparison of the temperature rise at the end of the core portion 11 of the stator 10 (see "core end" in FIG. 1) with and without the shielding member 110 when the stator 10 is heated by the stator heating device 1 according to the present disclosure. It can be seen that providing the shielding member 110 can suppress abnormal heating of the core portion 11 of the stator 10.

[0015] As a comparative example, Fig. 3 is a graph showing a comparison of the temperature rise in the center (see "core center" in Fig. 1) and end (see "core end" in Fig. 1) of the core portion 11 of the stator 10 when the stator 10 is heated by a stator heating device that does not have a shielding member 110. It can be seen that without the shielding member 110, the rate of temperature rise differs greatly between the core center and the core end. It can be seen that by providing the shielding member 110, abnormal heating of the core end can be suppressed.

[0016] In this way, it is possible to provide a stator heating device that suppresses thermal deformation and overheating of a stator with windings attached when heated.

[0017] The present disclosure is not limited to the above-described embodiment, and can be modified as appropriate within the scope of the present disclosure. [Explanation of symbols]

[0018] 1 Stator heating device 10 Stator 11 Core 12 Inner wall 13 Exterior wall 100 induction heating coil 110 Shielding member

Claims

[Claim 1] A heating device for a stator having a winding attached thereto, an induction heating coil provided on at least one of an inner wall portion and an outer wall portion of a core portion of the stator; an annular shielding member provided at an end of the stator in the lamination direction and at the outer wall portion, Stator heating device.

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