Insulating paint for variable frequency motor and preparation method thereof

A frequency conversion motor, insulating paint technology, applied in sustainable manufacturing/processing, chemical industry, coating, etc., can solve problems such as hindering motor heat dissipation, increasing the number of partial discharges, accelerating insulation aging speed, etc., to achieve dielectric loss The effect of low, high electrical strength, excellent mechanical properties

Active Publication Date: 2010-11-24
武汉长海电力推进和化学电源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As we all know, most insulating materials are heat-insulating, and their thermal conductivity is generally around 0.2w/m·k, which makes the insulating materials insulate while hindering the heat loss of the motor due to high-speed rotation and electric shock to a certain extent. The accumulation of heat will accelerate the aging speed of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] Example 1:

[0043] The technical scheme of an insulating varnish for variable frequency motors of the present invention is: it is composed of a base material and a filler; the base material includes unsaturated polyester resin, epoxy resin, crosslinking monomer, initiator, polymerization inhibitor, acid anhydride curing agent ; The parts by weight of the distribution ratio of each component are: unsaturated polyester resin: 20-60 parts; epoxy resin: 5-20 parts; polymerization inhibitor: 0.001-0.02 parts; acid anhydride curing agent: 4-20 parts; Co-monomer: 10-30 parts; initiator: 0.1-0.6 parts; dispersant: 0.01-0.1 parts; filler: 0.1-40 parts. Specifically, this embodiment: unsaturated polyester resin: 20 parts; epoxy resin: 5 parts; crosslinking monomer: 10 parts; initiator: 0.1 part; polymerization inhibitor: 0.001 part; acid anhydride curing agent: 4 Parts; Dispersant: 0.01 parts; Filler: 10 parts. The unsaturated polyester resin is isophthalic or isophenylene neopen...

Example Embodiment

[0044] Example 2:

[0045] The difference from Example 1 is that the weight ratio of each component is: unsaturated polyester resin: 60 parts; epoxy resin: 20 parts; crosslinking monomer: 30 parts; initiator: 0.6 parts; Polymerizing agent: 0.02 parts; acid anhydride curing agent: 20 parts; dispersing agent: 0.1 part; filler: 40 parts; the unsaturated polyester resin is a heat-resistant unsaturated polyester resin; the epoxy resin is a double A mixture of phenol A epoxy resin and novolac epoxy resin. The crosslinking monomer is a mixture of isotriallyl cyanurate, diallyl phthalate and methyl methacrylate; the initiator is tert-butyl peroxybenzoate and A mixture of dicumyl peroxide. The polymerization inhibitor is methyl hydroquinone, tert-butyl catechol, tert-butyl hydroquinone, p-benzoquinone, 2,6-di-tert-butyl-4-methylphenol, and more A mixture; the acid anhydride curing agent is a mixture of one or more of methyl hexahydrophthalic anhydride. The filler is one or more mixtur...

Example Embodiment

[0046] Example 3:

[0047] The difference from Example 1 is that the weight ratio of each component is: unsaturated polyester resin: 40 parts; epoxy resin: 15 parts; cross-linking monomer: 15 parts; initiator: 0.4 parts; Polymerizing agent: 0.01 parts; acid anhydride curing agent: 10 parts; dispersing agent: 0.1 parts; filler: 30 parts.

[0048] 2. The technical scheme of the preparation method of insulating varnish for variable frequency motor of the present invention will be further described in combination with the examples.

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Abstract

The invention relates to an insulating paint for a variable frequency motor and a preparation method thereof. The insulating paint comprises the main components: unsaturated polyester resin, epoxy resin, cross-linking monomer, initiator, acid anhydride curing agent, polymerization inhibitor and filler. The preparation method comprises the steps of: preparing materials according to the components in part by weight, mixing base materials uniformly for later use, treating the filler and mixing and treating the base materials and the filler. The invention has the advantages that: the insulating paint is suitable for the variable frequency motor, in particular a high-power variable frequency motor; an insulating paint film has excellent mechanical property, good compatibility with electromagnetic wires, long pulse-resistant time, high electrical strength, low dielectric loss, good chemical stability resistance and high heat conductivity; and the preparation method for the insulating paint can ensure the quality of the produced insulating paint for the variable frequency motor.

Description

Technical field [0001] The invention relates to an insulating paint for a frequency conversion motor and a preparation method thereof, and belongs to the technical field of paint and motor manufacturing. Background technique [0002] Insulation is the heart of the motor, and its performance directly affects the operating life and reliability of the motor. The early damage of the inverter motor insulation is the result of multiple factors such as partial discharge, space charge, dielectric loss heating, electromagnetic excitation and vibration. [0003] The thermal breakdown of insulation caused by dielectric loss is one of the general concerns of motor insulation. In the insulation of variable frequency motors, the high frequency components of the voltage reach megahertz. The degree of insulation heating caused by the turning polarization of the dipole greatly exceeds that of the power frequency motor. The inverter-powered motor current deviates from the sinusoidal waveform, so ...

Claims

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Application Information

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IPC IPC(8): C09D167/06C09D163/02C09D163/04C09D5/25
CPCY02P20/10
Inventor 张凯朱宏王晓梅焦丕玉张建
Owner 武汉长海电力推进和化学电源有限公司
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