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Insulated wire and coil using the same

A technology for insulating wires and insulating layers, applied in insulated cables, insulated conductors, organic insulators, etc., can solve problems such as reduced mechanical strength, and achieve the effects of excellent processability, high storage modulus, and excellent processability.

Inactive Publication Date: 2014-03-26
PROTERIAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, when the number of imide groups in polyimide is reduced, the mechanical strength may decrease

Method used

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  • Insulated wire and coil using the same
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  • Insulated wire and coil using the same

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Experimental program
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Effect test

Embodiment approach

[0030] Hereinafter, embodiments of the insulated electric wire and the coil using the insulated electric wire according to the present invention will be specifically described.

[0031] (insulated wire)

[0032] The insulated electric wire of this embodiment includes: a conductor; and an insulating layer made of polyimide provided on the outer periphery of the conductor, the insulating layer is composed of a repeating unit represented by the above formula (1) and a compound represented by the above formula (2). The polyimide composition of the repeating unit is composed of the first acid component in the repeating unit represented by the above formula (1) and the second acid component in the repeating unit represented by the above formula (2), in a molar ratio (the first In the case of acid component: second acid component), it is compounded in a molar ratio range of 85:15 to 40:60, and the residue R of the diamine component in the above formula (1) and the above formula (2) i...

Embodiment 1）

[0058] After dissolving 4,4'-diaminodiphenyl ether (ODA) and 4,4'-bis(4-aminophenoxy)biphenyl (BAPB) in N-methylpyrrolidone (NMP), dissolve it in Pyromellitic dianhydride (PMDA) and 3,3',4,4'-biphenyltetracarboxylic dianhydride (s-BPDA) were stirred at room temperature for 12 hours to obtain "PMDA:s-BPDA:ODA:BAPB =75:25:85:15”mixing ratio of polyamic acid paint. This polyamic acid paint was diluted and adjusted for painting workability. The following process was repeated 15 times to obtain an insulated wire with a film thickness of 40 μm: Coating the obtained coating on a copper wire with a diameter of 0.8 mm by a normal method, and firing in a coating furnace at 450° C. for 90 seconds.

Embodiment 2）

[0060] In Example 1, it carried out similarly to Example 1 except having changed the compounding ratio of the polyamic-acid paint into "PMDA:s-BP DA:ODA:BAPB=50:50:50:50".

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Abstract

The present invention provides an insulated wire excellent in partial discharge resistance and high temperature processability, and a coil using the same. The insulated wire includes a conductor and polyimide comprising a repeating unit represented by the following formula (1) and a repeating unit represented by the following formula (2), wherein a first acid component in the repeating unit represented by the formula (1) and a second acid component in the repeating unit represented by the formula (2) are mixed in a molar ratio range of 85:15 to 40:60 as expressed by a molar ratio (the first acid component:the second acid component), wherein R as a residue of a diamine component in the formulas (1) and (2) comprises a residue of 4,4'-diaminodiphenyl ether and a residue of one selected from a group of diamines represented by the following formulas (3) to (8), and wherein a storage elastic modulus of the polyimide at 325 DEG C is not less than 50 MPa.

Description

technical field [0001] The present invention relates to an insulated electric wire and a coil using the insulated electric wire. More specifically, it relates to an insulated electric wire excellent in partial discharge resistance and high-temperature workability, and a coil using the insulated electric wire. Background technique [0002] As an insulated wire having an insulating layer (insulating film) excellent in mechanical properties, heat resistance, and solvent resistance, for example, the use of pyromellitic dianhydride (PMDA) and 4,4-diaminobis An insulated wire made of polyimide synthesized from phenylene ether (ODA) (for example, refer to Patent Document 1). [0003] In recent years, industrial motors have become smaller and lighter. In addition, high-voltage driving for high output power and inverter driving for improving power performance are rapidly developing. [0004] By driving the motor at a high voltage and simultaneously driving the inverter, the risk o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/02H01B3/30C09D179/08C09D5/25
CPCH01B3/306Y10T428/2969
Inventor 牛渡刚真本田祐树锅岛秀太菊池英行
Owner PROTERIAL LTD
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