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Rotor and reluctance motor

A technology of rotor and rotor core, applied in the direction of magnetic circuit, magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve the problems of magnetic flux leakage, motor performance degradation, saliency degradation and other problems

Active Publication Date: 2021-01-19
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, if the width of the bridge portion in the vicinity of the magnetic flux barrier is increased, the magnetic flux leaks from the bridge portion, and the magnetic flux flows in the direction (d-axis direction) that should block the magnetic flux, so there are salient poles performance reduction, output density, efficiency, power factor and other motor performance problems such as decline
On the other hand, if the width of the bridge portion is reduced, the motor performance may be improved, but the mechanical strength may be reduced

Method used

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  • Rotor and reluctance motor
  • Rotor and reluctance motor
  • Rotor and reluctance motor

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no. 1 Embodiment approach

[0025] figure 1 It is a cross-sectional view perpendicular to the rotating shaft 8 showing the configuration of one pole of the reluctance motor 1 in the first embodiment. In addition, in figure 1 In , only the amount of one pole of the reluctance motor 1 , that is, the amount of the angular area of ​​the 1 / 4 turn of the circle is shown. The rotary shaft 8 may be, for example, a shaft that is rotatably supported, extends in the axial direction around the rotary shaft 8 , and rotates around the rotary shaft 8 .

[0026] As shown in the figure, a reluctance motor 1 includes a substantially cylindrical stator 2 , and a rotor 3 , which is provided radially inward of the stator 2 and is provided rotatably relative to the stator 2 . In addition, the stator 2 and the rotor 3 are arranged in a state where their respective central axes are located on a common axis. Hereinafter, the common axis is referred to as a central axis O, a direction perpendicular to the central axis O is ref...

no. 2 Embodiment approach

[0086] Hereinafter, a reluctance motor 1A in the second embodiment will be described. Here, as a point of difference from the first embodiment, two central bridge portions BD are formed. c , three barrier regions are formed in each of the flux barriers 11a, 11b, and 11c. Hereinafter, a description of functions and the like common to those of the first embodiment described above will be omitted.

[0087] Figure 8 It is a cross-sectional view perpendicular to the rotating shaft 8 showing the configuration of one pole of the reluctance motor 1A in the second embodiment. in addition, Figure 9 It is a figure which shows the relationship of the distance from the central axis O to each magnetic flux barrier.

[0088] Such as Figure 8 as well as Figure 9 As shown, in the second embodiment, the position of the magnetic flux barrier 11a closest to the outer peripheral side is defined as a1, and the position of the magnetic flux barrier 11c closest to the central axis O is defi...

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Abstract

The rotor of the embodiment has a shaft and a rotor core. A plurality of flux barriers are formed in the rotor core. In the magnetic flux barrier, one or more barrier regions are formed between a plurality of bridge portions. Let the width of the bridge portion of the first magnetic flux barrier be w a , let the width of the bridge portion of the second flux barrier be w b , the value obtained by dividing the radius of the smallest circle that touches the centerline of the first flux barrier by the outer radius of the rotor core is set to a, and the smallest circle that touches the centerline of the second flux barrier The value obtained by dividing the radius of the circle by the outer radius of the rotor core is set to b(>a), f(x)=(1-x^2)^(3 / 2), g(x)=(1- In the case of x^3), satisfy f(b) / f(a)≤w b / w a ≤g(b) / g(a) relationship.

Description

technical field [0001] Embodiments of the present invention relate to a rotor and a reluctance motor. [0002] This application claims priority based on Japanese Patent Application No. 2016-182354 filed in Japan on September 16, 2016, the content of which is incorporated herein. Background technique [0003] A reluctance motor is known in which a flux barrier as a magnetic barrier is formed in a rotor. In the prior art, if the width of the bridge portion in the vicinity of the magnetic flux barrier is increased, the magnetic flux leaks from the bridge portion, and the magnetic flux flows in the direction (d-axis direction) that should block the magnetic flux, so there are salient poles There are problems such as decreased performance, decreased output density, efficiency, power factor, and other motor performance. On the other hand, if the width of the bridge portion is reduced, the motor performance may be improved, but the mechanical strength may be reduced. [0004] pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K19/10H02K1/22
CPCH02K1/246H02K19/103H02K2213/03H02K1/22H02K19/10H02K1/2766
Inventor 竹内活德松下真琴高桥则雄三须大辅长谷部寿郎
Owner KK TOSHIBA