CN217087614U - Thinned 10kV high-voltage motor glue-less insulation structure - Google Patents

Abstract

The utility model discloses a 10kV high-voltage motor of attenuate adhesive-free insulation system, including electromagnetic wire and few rubber powder mica tape, the electromagnetic wire is mica around the package electromagnetic wire, and mica draws the type around the package electromagnetic wire and be the rhombus coil after, at coil straight line portion electromagnetic wire outside half-lap 7 layers of few rubber powder mica tape, wraps the low-resistance in the few rubber powder mica tape outside and prevents the dizzy area. The utility model discloses can realize frivolous efficient stator coil insulation.

Description

Thinned 10kV high-voltage motor glue-less insulation structure

Technical Field

The utility model relates to an attenuate 10kV high-voltage motor few-glue insulation system for motor insulation wraps field.

Background

In recent years, a less-glue insulation structure has the advantages of small insulation thickness, high electrical strength, good heat resistance, environmental protection and the like, and is popularized and applied to the manufacture of stator coils of large and medium alternating-current high-voltage motors in China. However, at present, the main insulation of a 10kV low-glue insulation structure motor of a domestic main motor manufacturing enterprise tends to ensure the insulation performance, a mica tape binding structure form with a higher layer number is usually adopted, the thickness reaches 2.08mm and above, a certain gap exists between the thickness of the insulation structure and the thickness of a foreign advanced motor manufacturing enterprise, the structure size advantage of a low-glue insulation system is not completely shown, the slot utilization rate and the working efficiency of the motor are limited, and the improvement direction of the motor size reduction under the premise of controlling the temperature rise is also limited; the excessive number of layers of main insulation wrapping can also influence the heat dissipation level of the insulation structure, so that the integral temperature rise of the motor stator is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of prior art, provide a 10kV high-voltage motor of attenuate adhesive-less insulation system, can realize frivolous efficient stator coil insulation.

One technical scheme for achieving the above purpose is as follows: a thinned 10kV high-voltage motor less-glue insulation structure comprises an electromagnetic wire and a less-glue-powder mica tape;

the electromagnetic wire is a mica wrapped electromagnetic wire, after the mica wrapped electromagnetic wire is in a diamond-shaped coil in a pulling mode, 7 layers of mica tapes with less glue powder are wrapped outside the electromagnetic wire in the straight line part of the coil in a half-lap mode, and a low-resistance anti-corona tape is wrapped outside the mica tapes with less glue powder.

Furthermore, resin filler is filled in gaps of the mica lapped electromagnetic wires.

The utility model discloses an attenuated 10kV high voltage motor insulation construction that lacks glues, through abundant experimental verification, under the prerequisite that guarantees that electric intensity accords with the examination requirement, wrap up 10kV insulation construction that lacks glues and confirm for 7 layers, make 10kV motor insulation construction thickness that lacks glue by 2.08mm and above reduce to 1.82mm, attenuate 12.5%, help reducing the motor size, reduce the power loss of motor operation in-process, improve the motor temperature rise, improve the groove utilization ratio and the work efficiency of motor.

Drawings

Fig. 1 is the structural schematic diagram of the less-glue insulation structure of the thinned 10kV high-voltage motor of the present invention.

Detailed Description

In order to better understand the technical solution of the present invention, the following detailed description is made by specific embodiments:

referring to fig. 1, the utility model discloses a thin-reducing 10kV high-voltage motor insulation structure that lacks glue, including electromagnetic wire 1 and few gluey powder mica tape 2, electromagnetic wire 1 is mica around the covering electromagnetic wire, and mica winds the covering electromagnetic wire and draws the type for the rhombus coil after, at coil straight line portion electromagnetic wire outside half-lap 7 layers of few gluey powder mica tape 2, wraps up in the few gluey powder mica tape 2 outside and has prevented dizzy area 3 with low resistance. After the structure is used for binding, other parts of the coil are bound according to the conventional requirement. After the coil is embedded into the iron core, a Vacuum Pressure Impregnation (VPI) process is carried out to impregnate the solvent-free impregnating resin and bake, so that the gaps of the mica wrapped electromagnetic wire are filled with the resin filler 4, and a complete insulation structure with less glue is formed.

The utility model discloses an under the condition of the few gluey insulation system of 10kV high-voltage motor of attenuate guaranteed electrical performance, wrap the number of piles with main insulation and determine to 7 layers, make 10kV motor few gluey insulation system thickness reduce to 1.82mm by 2.08mm, attenuate 12.5%. And through sufficient test verification, when the thinning insulation structure is used for checking a simulation coil, the normal-temperature and thermal-state dielectric loss values and the dielectric loss increment of the coil dipped by the VPI process both meet the superior quality indexes in JB/T50133 'quality grade of medium-sized high-voltage motor low-glue whole dipping coil products, and the like'; the electrical strength is more than 38kV/mm, and the quality is also superior; the heat resistance performance of the motor is not obviously different from that of an eight-layer mica tape insulation structure through tests, and the motor can meet the requirement of long-term operation of the motor in a heat-resistant grade F state.

It should be understood by those skilled in the art that the above embodiments are only used for illustrating the present invention, and not used as a limitation of the present invention, and that the changes and modifications to the above embodiments are all within the scope of the claims of the present invention as long as they are within the spirit of the present invention.

Claims (2)

1. The utility model provides a 10kV high voltage motor of attenuate few glue insulation system, includes electromagnetic wire and few glue powder mica tape, its characterized in that:

the electromagnetic wire is a mica wrapped electromagnetic wire, after the mica wrapped electromagnetic wire is in a diamond-shaped coil in a pulling mode, 7 layers of mica tapes with less glue powder are wrapped outside the electromagnetic wire in the straight line part of the coil in a half-lap mode, and a low-resistance anti-corona tape is wrapped outside the mica tapes with less glue powder.

2. The reduced thickness 10kV high-voltage motor insulation structure with less glue of claim 1, wherein gaps of mica wrapped electromagnetic wires are filled with resin fillers.

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