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Stator adhesive laminated core and rotating electric machine

A technology for stators and bonding parts, applied in the manufacture of stator/rotor bodies, motors, adhesive types, etc., can solve the problem of insufficient bonding ability, insufficient insulation ability of insulating coating, poor excitation efficiency, etc. question

Pending Publication Date: 2021-07-23
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is stated that if the insulating coating is thinner than 0.80μm, sufficient insulation cannot be obtained, and if it is thicker than 1.20μm, the excitation efficiency will be poor
On the other hand, if the adhesive coating is thinner than 1.80 μm, sufficient adhesion cannot be obtained, and if it is thicker than 2.20 μm, the excitation efficiency will be poor.

Method used

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  • Stator adhesive laminated core and rotating electric machine
  • Stator adhesive laminated core and rotating electric machine
  • Stator adhesive laminated core and rotating electric machine

Examples

Experimental program
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Effect test

Embodiment

[0080] use Figure 4 The manufacturing apparatus 100 shown manufactures the above-mentioned stator core 21 while changing various manufacturing conditions.

[0081] First, the manufacturing apparatus 100 will be described. In this manufacturing apparatus 100 , the electrical steel sheet P is fed out from a coil C (strip) in the direction of arrow F, and punched multiple times by dies arranged on each stage to gradually form the shape of the electrical steel sheet 40 . Then, an adhesive is applied to the lower surface of the electrical steel sheet 40, and the punched electrical steel sheets 40 are stacked, and pressure is applied while raising the temperature. As a result, the adhesive is cured to form the bonding portion 41, and bonding is completed.

[0082] Such as Figure 4 As shown, the manufacturing apparatus 100 includes: a first-stage punching station 110 at a position closest to the steel coil C; The punching station 120 of the second stage; and the adhesive coatin...

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Abstract

This stator adhesive laminated core is provided with: a plurality of magnetic steel sheets having an insulating coat in a phosphate system on the surface thereof and overlapped coaxially; and an adhesive portion provided between the respective magnetic steel sheets. The insulating coat has an average thickness of 0.3 [mu]m to 1.2 [mu]m. The adhesive portion has an average thickness of 1.0 [mu]m to 3.0 [mu]m. When the average thickness of the insulating coat is denoted by t1 with a unit of [mu]m and the average thickness of the adhesive portion is denoted by t2 with a unit of [mu]m, the following formula 1 is satisfied. -4.3 x t1 + 3.6 <= t2 <= -4.3 x t1 + 6.9 ...(formula 1).

Description

technical field [0001] The present invention relates to a bonded laminated core for a stator and a rotating electric machine. [0002] This application claims priority based on Japanese Patent Application No. 2018-235864 for which it applied in Japan on December 17, 2018, and uses the content here. Background technique [0003] Conventionally, a laminated core as described in Patent Document 1 below is known. Patent Document 1 below discloses a direct drive motor including a stator coaxially arranged inside a rotor. In addition, an insulating coating and an adhesive coating are formed on the electromagnetic steel sheet on the stator side. It is described that if the insulating coating is thinner than 0.80 μm, sufficient insulating capability cannot be obtained, and if it is thicker than 1.20 μm, the excitation efficiency will be poor. On the other hand, if the adhesive coating layer is thinner than 1.80 μm, sufficient adhesion cannot be obtained, and if it is thicker than...

Claims

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Application Information

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IPC IPC(8): H02K15/02H02K1/18
CPCH02K2213/03H02K15/024H02K1/04Y02T10/64H02K1/18H02K15/02C09J133/04C09J2203/326H01F27/245H01F41/0233H02K1/185
Inventor 竹田和年平山隆
Owner NIPPON STEEL CORP
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