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Synchronous reluctance type rotating electrical machine

A synchronous reluctance, rotating electrical machine technology, applied to synchronous motors, asynchronous induction motors, electrical components, etc. for single-phase current, can solve problems such as reduced efficiency of synchronous reluctance rotating electrical machines

Active Publication Date: 2019-06-04
TOSHIBA IND PROD & SERVICES CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a case, the magnetic flux that pulsates according to the pitch of the teeth of the stator interlinks with the conductor, so that a harmonic current that is useless to the rotation of the rotor flows in the conductor
This harmonic current is converted into Joule heat, which may lead to a decrease in the efficiency of the synchronous reluctance type rotating machine.

Method used

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  • Synchronous reluctance type rotating electrical machine
  • Synchronous reluctance type rotating electrical machine
  • Synchronous reluctance type rotating electrical machine

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0031] figure 1 It is a sectional view perpendicular to the axis 14 (central axis O) showing a part of the structure of the rotating electrical machine 1 . In addition, in figure 1 In , only the 1 / 4 sector of the rotating electrical machine 1 , that is, the amount of the angular area of ​​1 / 4 of the turn is shown.

[0032] As shown in the figure, the rotating electric machine 1 includes a substantially cylindrical stator 3 and a rotor 4 provided radially inward of the stator 3 and rotatably provided relative to the stator 3 . In addition, the stator 3 and the rotor 4 are arranged with their respective central axes positioned on a common shaft. Hereinafter, the common shaft is referred to as a central axis (rotational axis) O, a direction perpendicular to the central axis O is referred to as a radial direction, and a direction rotating around the central axis O is referred to as a circumferential direction.

[0033] The stator 3 has a substantially cylindrical stator core 10...

no. 2 Embodiment approach

[0101] Next, based on Figure 11 , Figure 12 A second embodiment will be described.

[0102] Figure 11 It is a cross-sectional view perpendicular to the axis 8 showing a part of the configuration of the rotor core 215 in the second embodiment.

[0103] As shown in the figure, in the rotor core 215 in the second embodiment, the conductor bars 41 are not inserted into the cavities 23 and 24 , and the conductors 241 are cast instead of the conductor bars 41 . This point is different from the first embodiment described above.

[0104] In each of the cavities 21 to 24 of the rotor core 215, there are formed bridges (61 to 64) separated from the bridges (26 to 29) corresponding to both sides in the longitudinal direction of the cavity at predetermined intervals. ). The cavities 21 to 24 are partitioned by these partition bridges 61 to 64 . Furthermore, casting spaces 66 to 69 are respectively formed on both sides in the longitudinal direction of the respective cavities 21 to...

no. 3 Embodiment approach

[0120] Next, based on Figure 13 , Figure 14 A third embodiment will be described.

[0121] Figure 13 It is a sectional view perpendicular to the axis 8 showing a part of the configuration of the rotor core 315 in the third embodiment. Figure 14 It is a side view showing the rotor 304 in the third embodiment viewed from the radial direction of the shaft 14 .

[0122] Such as Figure 13 , Figure 14 As shown, in the rotor core 315 of the third embodiment, the conductor bars 41 are not inserted into the respective cavities 21 to 24 , and instead, the conductor bars 41 are inserted in the rotor core 315 at positions away from the cavities 21 to 24 . Through-holes 17 ( 17 a to 17 l ) are formed. Furthermore, conductor bars 341 are provided in these through holes 17 . This point is different from the first embodiment described above.

[0123] More specifically, in the rotor core 315 , the through hole 17 a is formed at a position closer to the outer peripheral surface 31...

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Abstract

A synchronous reluctance type rotating electrical machine according to a mode of embodiment of the present invention includes a shaft, a rotor iron core, rotor iron core retainers, a plurality of conductor bars, and short circuit rings. The shaft rotates around an axis of rotation. The rotor iron core is fixed to the shaft, and void portions having a convex shape facing toward the radially inner side are formed in a plurality of layers for each pole. The rotor iron core retainers retain the rotor iron core by pressing the same from both sides in the direction of the axis of rotation. The plurality of conductor bars are disposed in the void portions, extending in the axis of rotation, and the two ends thereof project through the rotor iron core retainers. The short circuit rings are provided at both ends of the plurality of conductor bars, and link the plurality of conductor bars. Further, the conductor bars are fixed to the rotor iron core retainers.

Description

technical field [0001] Embodiments of the present invention relate to a synchronous reluctance type rotating electrical machine. Background technique [0002] The synchronous reluctance rotating electric machine includes a rotor and a stator. The rotor includes: a shaft rotatably supported by the shaft extending in the axial direction at the center of the rotating shaft; and a rotor core fitted and fixed to the shaft. The stator includes: a stator iron core arranged at intervals from the rotor iron core on the outer periphery of the rotor iron core, and having a plurality of tooth portions arranged at intervals in the circumferential direction; and a plurality of pole multiphase armature windings, respectively Wrapped around multiple teeth. [0003] In the rotor core, a plurality of cavity portions convex radially inward are formed for each stage. By forming the cavity in this way, a direction in which magnetic flux easily flows and a direction in which magnetic flux is d...

Claims

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Application Information

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IPC IPC(8): H02K19/10H02K17/16H02K17/26
CPCH02K17/16H02K17/26H02K19/10
Inventor 松本昌明荒木贵志松下真琴竹内活德长谷部寿郎
Owner TOSHIBA IND PROD & SERVICES CORP
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