CN201298386Y

CN201298386Y - High temperature resistant anticorrosion frequency conversion cable

Info

Publication number: CN201298386Y
Application number: CNU2008202168242U
Authority: CN
Inventors: 叶明茂; 何帮飞; 舒培培
Original assignee: Anhui Huayuan Cable Group Co Ltd
Current assignee: Anhui Huayuan Cable Group Co Ltd
Priority date: 2008-11-19
Filing date: 2008-11-19
Publication date: 2009-08-26
Anticipated expiration: 2018-11-19

Abstract

The utility model discloses a high temperature resistant anticorrosion frequency conversion cable. The core of the cable comprises three main insulated wires and three zero insulated wires; a lapping layer, a woven shield layer, an outer sheath layer and a reinforcement layer are successively disposed outside the main insulated wires and zero insulated wires. The cable has low effective capacitance and shielding performance, but the high density woven shield layer causes the cable to have excellent electromagnetic interference and electromagnetic radiation resistant performace, and is beneficial to the application of novel short circuit automatic protective apparatus. The lower homogeneous positive (negative) sequence and zero sequence impedance, compared with common four wired cable, improve power supply quality greatly, can endure high speed and pulse voltage in frequent frequency conversion, can reduce motor noise, and provide current non-motion protection; the cable achieves the advantages of compact and round structure and high electricity consumption safety, can completely meet the performance requirement of frequency conversion cable, can be used in the industries such as electric power, metallurgy, petrochemical and medium.

Description

The high-temperature resistant anti-corrosive frequency-changing cable

Technical field:

The utility model relates to a kind of cable, specifically a kind of high-temperature resistant anti-corrosive frequency-changing cable.

Background technology:

Development along with the FREQUENCY CONTROL drive technology, requirement to the frequency variable ratio drive system is more and more higher, especially to the modern converter technique of the IG BT semiconductor that adopts quick switching, although pulse frequency is high or more their can produce positive magnetic field to surrounding environment only within the millisecond break time.For keeping the frequency converter operate as normal, be not subjected to the interference of electromagnetic field, therefore, the cable between connection frequency converter and the three phase alternating current motor just requires to have interference free performance, lower effective capacitance reaches lower transfer impedance.

Present variable frequency power supply is by thyristor frequency modulation, has changed waveform characteristic on largely, thereby motor and cable have been brought new problem.The frequency-tuning range broad of variable frequency power supply, though the frequency height, the waveform profiles that all has a basic frequency, it has comprised many high order harmonic components, and through repeatedly reflection, the amplitude stack can reach the operating voltage several times as a kind of capable ripple, therefore cable is long more, and amplitude is just high more, and cable is often breakdown.

The utility model content:

For overcoming the defective of prior art, the purpose of this utility model is to provide a kind of to be had big, diamagnetic of good insulation preformance, puncture voltage height, heat-resistance index perturbed force is strong and reliability is excellent, thermal conductivity is good, the good frequency-changing cable of insulation strong, the moistureproof anti-chemical performance of tack, and it is applicable to that ac rated voltage 0.6/1kV and following frequency-changing control system make service cable or be electrically connected.

The utility model technical solution problem adopts following technical scheme:

A kind of high-temperature resistant anti-corrosive frequency-changing cable, the cable core of described cable comprise three main line insulated wires and three zero line insulated wires, are disposed with lapping layer, woven shield, external sheath layer and reinforced layer outside described main line insulated wire and zero line insulated wire.

Described lapping layer is the double-layer polyester band, and described woven shield is the copper wire woven shield, and described external sheath layer is heat-resisting silicon rubber, and described reinforced layer is compound Nitrile Rubber.

Described three main line insulated wires and three zero line insulated wires are respectively three major diameters and three minor diameter cores and each core and are spaced.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

It is three big three little that the utility model adopts, three main line insulated wires and three zero line insulated wires, the spaced structure of different-diameter core, core is conductor with the copper wire, heat-resisting silicon rubber directly is extruded in and forms the insulation cable core on the copper conductor, double-layer polyester band lapping layer and copper wire woven shield are arranged on the cable core behind the stranding, and heat-resisting silicon rubber oversheath is extruded on the copper wire woven shield, and outermost layer increases compound Nitrile Rubber reinforced layer.The product advantage: cable has lower effective capacitance and shielding properties, and the high density woven shield makes cable have good anti-electromagnetic interference, the performance of electromagnetic radiation, helps the application that equipment is protected in novel short circuit automatically.Lower and uniformly just (contrary) preface and zero sequence impedance are compared the very big power supply quality that improved with common quad, can stand at a high speed, the pulse voltage during frequent frequency conversion, can reduce motor noise, and the protection of electric current attonity is provided; Construction of cable compactness, rounding, the electrical safety advantages of higher can satisfy the performance requirement of frequency-changing cable fully, can be used for industries such as electric power, metallurgy, petrochemical industry, medium.

Description of drawings:

Fig. 1 is the utility model structural representation.

Number in the figure: 1 core conductor of serving as theme, 11 is the zero line core conductor, and 2,22 is insulating barrier, and 3 is lapping layer, and 4 is woven shield, and 5 is external sheath layer, and 6 is reinforced layer.

Below pass through embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.

Embodiment,

Non-limiting examples is as described below:

Embodiment: shown in Figure 1, in the present embodiment, three main line insulated wires are made up of master core conductor 1 and insulating barrier 2 respectively, and three zero line insulated wires are made up of zero line core conductor 11 and insulating barrier 22 respectively, and insulating

barrier

2,22 is heat-resisting silicon rubber and extrudes and form; The double-layer polyester band is wrapped interior with three main line insulated wires and three zero line insulated wires, form lapping layer 3, be outside equipped with copper wire woven shield 4 at lapping layer 3, then extruding heat-resisting silicon rubber is external sheath layer 5, sets up compound Nitrile Rubber reinforced layer 6 outside the external sheath layer 5.

Claims

1, a kind of high-temperature resistant anti-corrosive frequency-changing cable, it is characterized in that, the cable core of described cable comprises three main line insulated wires and three zero line insulated wires, is disposed with lapping layer (3), woven shield (4), external sheath layer (5) and reinforced layer (6) outside described main line insulated wire and zero line insulated wire.

2, high-temperature resistant anti-corrosive frequency-changing cable according to claim 1, it is characterized in that described lapping layer (3) is the double-layer polyester band, described woven shield (4) is the copper wire woven shield, described external sheath layer (5) is heat-resisting silicon rubber, and described reinforced layer (6) is compound Nitrile Rubber.

3, high-temperature resistant anti-corrosive frequency-changing cable according to claim 1 is characterized in that, described three main line insulated wires and three zero line insulated wires are respectively three major diameters and three minor diameter cores and each core and are spaced.