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Reluctance motor, and method for manufacturing rotor core used in reluctance motor

A reluctance motor and a manufacturing method technology, which are applied in the directions of magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve the problem of large torque pulsation of reluctance motor, and achieve the effect of reducing torque pulsation

Active Publication Date: 2017-12-01
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the torque ripple of the reluctance motor is generally large, and further improvement is required for use in the aforementioned applications.

Method used

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  • Reluctance motor, and method for manufacturing rotor core used in reluctance motor
  • Reluctance motor, and method for manufacturing rotor core used in reluctance motor
  • Reluctance motor, and method for manufacturing rotor core used in reluctance motor

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0049] figure 1 It is a figure which shows the system at the time of using the reluctance motor which concerns on Embodiment 1 of this invention. exist figure 1 Among them, a reluctance motor 1 is connected to a control device 2 via a power supply line 3 . Furthermore, the reluctance motor 1 is a motor that converts electric energy supplied from the control device 2 into mechanical energy.

[0050] figure 2 It is a cross-sectional view of the reluctance motor 1 in Embodiment 1 of the present invention cut along the axial direction. exist figure 2 Among them, the stator 6 and the rotor 9 are configured to freely rotate with each other through a mechanical gap using bearings 14 , and the stator 6 and the rotor 9 are inserted into the frame 15 by press-fitting or shrink-fitting, and are fixed.

[0051] The stator 6 is configured by providing a winding 5 to a stator core 4 made of an iron core. Furthermore, the stator 6 has a function of generating a rotating magnetic fiel...

Embodiment approach 2

[0164] Figure 15 It is a sectional view of the rotor core 7 of the reluctance motor 1 according to Embodiment 2 of the present invention. This structure is similar to the previous Figure 11 Very similar, but different in that the relative angle ξ of the right slit wall 111k of the first slit end 113k of the first group to the right slit wall 111m of the first slit end 113m of the second group 1 2 , the relative angle ψ between the left slit wall 112l of the second slit end 113l of the first group and the left slit wall 112m of the first slit end 113m of the second group 1 2 It is set by the following formulas (7) and (8).

[0165] 【Equation 7】

[0166]

[0167]

[0168] In the above formulas (7) and (8), each symbol represents the following content, respectively.

[0169] ·g is the number of groups, in Figure 15 Among them, g=2.

[0170] ·Set the interval between the first group and the jth group as ξ 1 j and ψ 1 j , so here, j=2.

[0171] k i and s j S...

Embodiment approach 3

[0180] Figure 16 It is a sectional view of the rotor core 7 of the reluctance motor 1 according to Embodiment 3 of the present invention. This structure is similar to the previous Figure 11 Very similar, but make Group 1 consist of slit ends 113o and 113r and Group 2 consist of slit ends 113p and 113q. And, by setting n in each group i = l i, so that the shape of the slit 11 is line-symmetric with respect to the circumferential center of the slit 11, which is the same as Figure 11 different.

[0181] Even with the configuration as described above, the qNs / p-order component of the torque ripple can be reduced, and an effect can be obtained in which the characteristic can be made the same when the torque is output to the left and when the torque is output to the right. If these are summed up, then Figure 16 Angle δ in 1 2 ,δ 2 2 , ε 1 2 , ε 2 2 become as shown in Table 4.

[0182] [Table 4]

[0183] Table 4. Figure 12 angle in

[0184]

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Abstract

With regard to the shape of slot end parts in a rotor core having as many flux barriers in the circumferential direction as the number of poles, the flux barriers being formed by alternately arranging one or more slits and core layers in the radial direction, the slit end parts are shaped so that deltagi and epsilongi satisfy a predetermined formula, these variables representing the spacing between the first slit end to the ith slit end on the same direction side when viewed in the circumferential direction, where mg represents the number of slot end parts, ni represents a natural number equal to or greater than 1, alpha and beta represent a number in the range of -1 / 4 to 1 / 4, q represents a natural number equal to or greater than 1, and Ns represents the number of slots.

Description

technical field [0001] The present invention relates to a reluctance motor generating reluctance torque, and more particularly, to a structure of a reluctance motor for reducing torque ripple, and a method of manufacturing a rotor core used in a reluctance motor. Background technique [0002] A reluctance motor is a motor having a structure in which reluctance differs in the rotational direction of the rotor by forming slit-shaped magnetic isolation slots in the rotor core, and torque is generated by this structure. Compared with an induction motor (induction machine), such a reluctance motor is evaluated to have advantages such as no occurrence of secondary copper loss of the rotor. Furthermore, based on such advantages, applications to air conditioners, automobiles, and the like are expected as reluctance motor applications. [0003] However, reluctance motors generally have large torque ripples, and further improvement is required for use in the aforementioned applicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/22H02K1/24
CPCH02K1/22H02K1/24H02K29/03H02K1/276H02K1/246H02K2213/03
Inventor 伊藤一将山口信一米谷晴之中野正嗣阿知和典弘前田美树原川雅哉
Owner MITSUBISHI ELECTRIC CORP
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