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KR-20260062411-A - Rotor module with cooling structure

KR20260062411AKR 20260062411 AKR20260062411 AKR 20260062411AKR-20260062411-A

Abstract

The present invention relates to a rotor module having a cooling structure, and more specifically, to [the invention]. The rotor module having a cooling structure according to the present invention has the effect of having a cooling structure that can improve cooling performance by eliminating oil pipes or cooling plates used for conventional oil cooling and creating a flow path that utilizes the rotor core surface and the thinning part to attempt maximum cost reduction, while simultaneously enabling direct cooling of the end coils on the outer side of the stator.

Inventors

  • 서영우

Assignees

  • 현대모비스 주식회사

Dates

Publication Date
20260507
Application Date
20241029

Claims (10)

  1. A rotor core portion formed in a cylindrical shape with a hollow hole formed axially through the center; A rotor shaft that is fitted into the hollow hole and includes a cooling fluid flow channel filled with cooling fluid, and rotates around the central axis of the rotor core portion; The above rotor core part is, It includes a cooling passage section in which one end is in communication with the cooling fluid flow passage and the other end is in communication with the outside of the rotor core, and The above rotor shaft is, A rotor module having a cooling structure characterized by including a communication channel formed through the radial direction of the rotor shaft, wherein one end is in communication with the cooling fluid flow channel and the other end is in communication with the cooling channel section.
  2. In Article 1, The above rotor core part is, It includes two or more separate rotor cores, and Each of the above rotor cores is axially laminated on the rotor shaft, and The above cooling channel section is, A plurality of first fluid passages formed at mutually corresponding positions of the rotor core and formed through in the axial direction, and A rotor module having a cooling structure characterized by including at least one second channel, wherein one end is in communication with the above-mentioned communication channel and the other end is in communication with any one of the above-mentioned first channels.
  3. In Paragraph 2, The above second Euro is, Formed in any one of the above rotor cores, and A rotor module having a cooling structure characterized by a groove formed concavely on the surfaces where the rotor cores come into contact with each other.
  4. In Paragraph 2, The above second Euro is, A rotor module having a cooling structure characterized by being formed through at an eccentric position spaced apart from the center of the first Euro and communicating with the first Euro.
  5. In Paragraph 2, The above cooling channel section is, A groove formed extending radially in the rotor core portion, wherein one end is in communication with the first fluid path and the other end is in communication with the outside of the rotor core, and includes a plurality of third fluid paths that are in communication with the first fluid path in a one-to-one correspondence. The above third Euro is, Each is formed on the rotor cores stacked at both ends in the axial direction among the rotor cores, and A rotor module having a cooling structure characterized by a concave formation on the surface where the rotor cores do not come into contact with each other.
  6. In Paragraph 5, It further includes end plate portions stacked on both axial ends of the rotor core portion; and The above end plate portion is, A rotor module having a cooling structure characterized by including a first plate, one side of which is in contact with the rotor core portion and is a flat plate.
  7. In Paragraph 2, It further includes end plate portions stacked at both axial ends of the rotor core portion; The above end plate portion is, It includes a second plate, one side of which contacts the rotor core portion, and The above cooling channel section is, A groove formed extending in the radial direction of the rotor core portion, and A rotor module having a cooling structure characterized by including a plurality of fourth channels formed concavely on one surface of the second plate, wherein one end is in communication with the first channel and the other end is in communication with the outside of the rotor core, and corresponds one-to-one with the first channel.
  8. In Paragraph 2, It further includes end plate portions stacked at both axial ends of the rotor core portion; The above end plate portion is, It includes a third plate, one side of which contacts the rotor core portion, and The above cooling channel section is, A rotor module having a cooling structure characterized by a hole formed through one surface of the third plate, one end of which is in communication with the first fluid path, the other end of which is in communication with the outside of the rotor core, and including a plurality of fifth fluid paths that are in communication with the first fluid path in a one-to-one correspondence.
  9. In Paragraph 2, It further includes end plate portions stacked on both axial ends of the rotor core portion; and The above end plate portion is, One side is in contact with the rotor core part and is a flat plate, A rotor module having a cooling structure characterized by including a fourth plate having a radial radius of one side that is shorter than the distance from the center of the rotor shaft to the radial end of the first fluid path.
  10. In Paragraph 3, The above cooling channel section is, A groove formed extending radially in the rotor core portion, comprising a plurality of sixth channels, one end of which communicates with the hollow hole and the other end of which communicates with the outside of the rotor core. The above 6th Euro is, Each is formed on the rotor cores stacked at both ends in the axial direction among the rotor cores, and A rotor module having a cooling structure characterized by a concave formation on the surfaces where the rotor cores come into contact with each other.

Description

Rotor module with cooling structure The present invention relates to a rotor module having a cooling structure, and more specifically to [the invention]. The heat sources of an electric motor are the coil through which current flows and the electrical steel core through which magnetic flux flows; consequently, the temperature of these components rises during motor operation. At this time, if the temperatures of the coil and electrical steel core become excessively high, motor malfunction could occur. To prevent this, cooling of the coil and electrical steel core was essential. Conventional cooling methods for coils and electrical steel cores included oil cooling, which involves directly spraying oil onto the heat source, and water cooling, which involves flowing cooling water through the housing channel to indirectly cool the heat source. However, while conventional oil cooling methods demonstrated high performance in terms of cooling efficiency, they had the disadvantage of being expensive. More specifically, because additional components such as cooling pipes and cooling plates through which oil flows had to be installed for oil cooling, significant costs were incurred in constructing the system. Furthermore, conventional oil cooling and water cooling methods utilizing cooling pipes had the problem of being difficult to cool the core of the electrical steel core, which is the main heat source. FIG. 1 is an overall perspective view of a rotor module having a cooling structure of the present invention. FIG. 2 is a perspective view of the rotor shaft of the present invention. FIG. 3 is an exploded perspective view illustrating the coupling relationship between the rotor core part and the rotor shaft of the present invention. FIG. 4 is a cross-sectional view illustrating a first embodiment of a rotor module having a cooling structure of the present invention. FIG. 5 is a plan view illustrating the contact surface of a rotor core according to a first embodiment of a rotor module having a cooling structure of the present invention. FIG. 6 is a plan view illustrating a non-contact surface of a rotor core according to a first embodiment of a rotor module having a cooling structure of the present invention. FIG. 7 is a plan view illustrating an end plate portion according to a first embodiment of a rotor module having a cooling structure of the present invention. FIG. 8 is a cross-sectional view illustrating a second embodiment of a rotor module having a cooling structure of the present invention. FIG. 9 is a plan view illustrating an end plate portion according to a second embodiment of a rotor module having a cooling structure of the present invention. FIG. 10 is a cross-sectional view illustrating a third embodiment of a rotor module having a cooling structure of the present invention. FIG. 11 is a plan view illustrating an end plate portion according to a third embodiment of a rotor module having a cooling structure of the present invention. FIG. 12 is a cross-sectional view illustrating a fourth embodiment of a rotor module having a cooling structure of the present invention. FIG. 13 is a plan view of a rotor core according to a fourth embodiment of a rotor module having a cooling structure of the present invention. FIG. 14 is a plan view illustrating the contact surface of a rotor core according to a fifth embodiment of a rotor module having a cooling structure of the present invention. Hereinafter, the technical concept of the present invention will be explained in more detail using the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, and should be interpreted in a meaning and concept consistent with the technical concept of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention. Hereinafter, the basic configuration of a rotor module (1000) having a cooling structure according to the present invention will be described with reference to FIGS. 1 to 3. As illustrated in FIG. 1, the rotor module (1000) having a cooling structure of the present invention may include a rotor core portion (100) and a rotor shaft (200). More specifically, the rotor core portion (100) may be formed in a cylindrical shape with a hollow hole (130) formed axially through the center, and the rotor shaft (200) may be fitted into the hollow hole (130) of the rotor core portion (100) and rotate around the central axis of the rotor core portion (100). Additionally, the rotor module (1000) having a cooling structure may further include end plate portions (300) stacked at both axial ends of the rotor core portion (100). At this time, the rotor core portion (100), the rotor shaft (200), and the end plate portions (300) may be fixed to each other by a keyway and a key. More specifically, a keyway extending axially may be formed on th