METHOD FOR MANUFACTURING STATOR FOR ELECTRIC ROTARY MACHINE

• US 20200136480A1
• Filed: 03/15/2018
• Published: 04/30/2020
• Est. Priority Date: 03/17/2017
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: SAKURADA, Manabu, NOMURA, Shogo
• Granted Patent: US 11,424,664 B2
• Time in Patent Office: Days
• CPC Class Codes: H02K 1/165 Shape, form or location of the slots
• CPC Class Codes: H02K 15/00 Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
• CPC Class Codes: H02K 15/0025 Shaping or compacting conductors or winding heads after the installation of the winding in the core or machine methods or apparatus for simultaneously twisting a plurality of hairpins prior to mounting H02K15/0428; Applying fastening means on winding heads
• CPC Class Codes: H02K 15/024 with slots
• CPC Class Codes: H02K 15/12 Impregnating, heating or drying of windings, stators, rotors or machines
• CPC Class Codes: H02K 15/14 Casings; Enclosures; Supports
• CPC Class Codes: H02K 2201/09 Magnetic cores comprising laminations characterised by being fastened by caulking
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine

Abstract

A method for manufacturing a stator for an electric rotary machine including a stator core formed by stacking a plurality of steel plates and a coil attached to the stator core, the method includes forming the steel plates, forming the stator core by stacking and fixing the plurality of steel plates with an adhesive, attaching the coil to the stator core, and changing a stack strength of the stator core, by deteriorating the adhesive such that a bending resonance frequency of the stator does not overlap with a pre-measured circular resonance frequency of the stator, the bending resonance frequency varying depending on the stack strength of the plurality of steel plates.

Claims

1. A method for manufacturing a stator for an electric rotary machine including a stator core formed by stacking a plurality of steel plates and a coil attached to the stator core, the method comprising:

forming the steel plates;

forming the stator core by stacking and fixing the plurality of steel plates; and

attaching the coil to the stator core, wherein

in the forming the stator core, the plurality of steel plates are stacked and fixed such that a bending resonance frequency of the stator core expresses a value not overlapping with a pre-measured ring resonance frequency of the stator, the bending resonance frequency varying depending on a stack strength of the plurality of steel plates.

2. The method for manufacturing a stator for an electric rotary machine according to claim 1, wherein

in the forming the stator core, the stack strength of the stator core is adjusted by adjusting the amount of adhesive to be applied to fix the steel plates.

3. A method for manufacturing a stator for an electric rotary machine including a stator core formed by stacking a plurality of steel plates and a coil attached to the stator core, the method comprising:

forming the steel plates;

forming the stator core by stacking and fixing the plurality of steel plates with an adhesive;

attaching the coil to the stator core; and

changing a stack strength of the stator core, by deteriorating the adhesive such that a bending resonance frequency of the stator does not overlap with a pre-measured circular resonance frequency of the stator, the bending resonance frequency varying depending on the stack strength of the plurality of steel plates.

4. The method for manufacturing a stator for an electric rotary machine according to claim 3, wherein

in the changing the stack strength, the adhesive is deteriorated by a heating temperature when varnish supplied to the stator is cured by heat.

5. The method for manufacturing a stator for an electric rotary machine according to claim 4, wherein

in the changing the stack strength, the adhesive is deteriorated by further heating the stator to a temperature higher than the heating temperature when the varnish is cured by heat.