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Oil cooling structure for magnet of motor and motor
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An oil cooling and magnet technology, applied in the field of motors, can solve the problems of motor performance degradation, uneven performance of multiple magnets, uneven temperature of multiple magnets, etc., to achieve the effect of ensuring performance and good maintenance
Pending Publication Date: 2022-07-15
TOYOTA JIDOSHA KK
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Problems solved by technology
As a result, there is concern that the performance of cooling the plurality of magnets arranged in the circumferential direction in the rotor core will become uneven.
As a result, there is concern that the temperatures of the plurality of magnets will become non-uniform and the performance of the motor will be deteriorated
Method used
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no. 1 example
[0040] refer to Figures 1 to 3B The oil cooling structure for the magnet of the motor is described in relation to the first embodiment. Note that in figure 2 , in order to avoid complicating the drawing, only some of the reference numerals are shown, and other reference numerals are omitted. Note that the corresponding figures are schematic diagrams, and the scales of components are different from actual scales for convenience of explanation.
[0041] (structure)
[0042] First, the structure of the motor 10 to which the oil cooling structure of the present embodiment is applied is described. Note that in the respective figures, the axial direction is indicated as the arrow S direction, and the radial direction is indicated by the arrow R.
[0043] as in figure 1 As shown, the motor 10 has a rotor shaft 12, a rotor core 14, end plates 16A, 16B, a stator core 18, and coil ends 20A, 20B.
[0044] The rotor shaft 12 is solidly cylindrical, and at the inside of the rotor s...
no. 2 example
[0079] refer to figure 1 , figure 2 , Figure 4A and Figure 4B An oil cooling structure for a magnet of a motor is described in relation to the second embodiment of the present disclosure. Structural elements similar to those of the first embodiment are denoted by the same reference numerals, and detailed descriptions thereof are omitted.
[0080] At the motor 100, the difference from the motor 10 of the first embodiment is only in the shape of the third oil passage 60 provided in the end plates 16A, 16B, and thus these parts are described. Note that only the third oil passage 60 of the end plate 16A is described, but the third oil passage 60 of the end plate 16B has a similar structure and the same operations and effects as the third oil passage 60 of the end plate 16A, and is therefore omitted its description.
[0081] as in Figure 4A As shown in , the third oil passage 60 formed at the inside of the end plate 16A has an axial direction portion 62 extending from the...
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Abstract
The invention relates to an oil cooling structure for a magnet of a motor and the motor. An oil cooling structure for a motor magnet includes: a pair of end plates which are disc-shaped and are mounted at both end portions of a rotor core; a third oil passage formed at an interior of the end plate, and having: axial direction portions extending in an axial direction of the rotor shaft and respectively connected to axial direction end portions of the second oil passage; and a discharge portion extending from an axial direction outer end portion of the axial direction portion toward a radial direction outer side and opening at an end portion of the end plate; and an angle mitigating member provided in the third oil passage at a corner formed by the axial direction portion and the discharge portion, the angle mitigating member configured to mitigate an angle formed by the axial direction portion and the discharge portion in an axial direction cross-section including the third oil passage.
Description
technical field [0001] The present disclosure relates to an oil cooling structure for a magnet of a motor, and to a motor. Background technique [0002] Japanese Patent Application Laid-Open (JP-A) No. 2016-158365 discloses a structure having: a first oil flow path formed in the interior of the rotor shaft; a plurality of second oil flow paths an oil flow path, the plurality of second oil flow paths extending from the first oil flow path toward the outside in the radial direction up to the back surfaces (oil reservoirs) of the plurality of magnets provided in the circumferential direction at the inside of the rotor; and A plurality of third oil flow paths communicate with the corresponding second oil flow paths (oil reservoirs) and extend in the axial direction of the shaft along the back surfaces of the corresponding magnets. Since the oil is caused to flow along the back surfaces of the respective magnets by centrifugal force accompanying the rotation of the rotor, the pl...
Claims
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