CN219436859U - Frequency converter - Google Patents

Abstract

The utility model provides a frequency converter. The phase-shifting transformer is arranged in the first cabinet body, and a plurality of first secondary side output joints and a plurality of second secondary side output joints are respectively arranged at the front side and the rear side of the phase-shifting transformer; arranging a plurality of copper bar contacts and a plurality of power units on the second cabinet body, wherein the copper bar contacts are correspondingly and electrically connected with the power units; and make first vice limit output contact and second vice limit output contact and a plurality of copper bar contact correspond the electricity and be connected, because the electric current that first vice limit output contact of this application and second vice limit output contact output is out of phase electric current, and a plurality of first vice limit output contacts are located same one side, and a plurality of second vice limit output contacts are located same one side, consequently, second vice limit output contact and first vice limit output contact pass through the cable and correspond the electric connection with a plurality of copper bar contacts after, can effectively avoid out of phase cable overlap joint to produce corona discharge together, and then avoid damaging the cable insulation layer because of corona discharge, avoid electric short circuit.

Description

Frequency converter

Technical Field

The utility model relates to the field of electricity, in particular to a frequency converter.

Background

The high-voltage frequency converter is widely applied to various fans, water pumps, compressors, rolling mills and other equipment in industries such as mining production, petrochemical industry, municipal water supply, metallurgical steelmaking, electric power energy sources and the like. The common high-voltage frequency converter is characterized in that a power frequency power supply provided by a power grid is output to a power cabinet through a cable after passing through a phase-shifting transformer cabinet of the high-voltage frequency converter to carry out rectification inversion, and then the power cabinet is output to a motor to realize dragging of the motor.

However, since the output secondary windings of the phase-shifting transformer cabinet of the existing high-voltage frequency converter are more and all output on the same side of the phase-shifting transformer, the cables are easily overlapped, corona discharge is easily generated when the heterogeneous cables are overlapped, and the insulating layer of the cables is damaged, so that electrical short circuit is caused.

Disclosure of Invention

Therefore, the embodiment of the utility model provides a frequency converter, which aims to solve the problems that the output secondary windings of the phase-shifting transformer of the existing high-voltage frequency converter are all output from the same side, so that the heterogeneous cables are easily lapped together, corona discharge is easily generated, and further, the insulation layer of the cables is easily damaged and the electric short circuit is easily caused.

In order to achieve the above object, the embodiment of the present utility model provides the following technical solutions:

a frequency converter, comprising: the phase-shifting device comprises a first cabinet body, a second cabinet body, a phase-shifting transformer, a plurality of power units and a plurality of copper bar contacts;

the phase-shifting transformer is arranged in the first cabinet body, the front side of the phase-shifting transformer is provided with a plurality of first secondary side output contacts, the rear side of the phase-shifting transformer is provided with a plurality of second secondary side output contacts, and the currents output by the first secondary side output contacts and the second secondary side output contacts are out-of-phase currents;

the copper bar contacts and the power units are arranged on the second cabinet body and are correspondingly and electrically connected with the input ends of the power units;

the first secondary side output contact and the second secondary side output contact are correspondingly and electrically connected with the copper bar contacts.

Preferably, the plurality of copper bar contacts are all arranged at the top of the second cabinet body.

Preferably, the method further comprises: the protective cover is arranged on the second cabinet body;

the copper bar joints are all positioned in the protective cover.

Preferably, the plurality of power units are arranged in the second cabinet.

Based on the frequency converter provided by the utility model, the phase-shifting transformer is arranged in the first cabinet body, a plurality of first secondary side output contacts are arranged on the front side of the phase-shifting transformer, and a plurality of second secondary side output contacts are arranged on the rear side of the phase-shifting transformer; the copper bar joints and the power units are arranged on the second cabinet body, and the copper bar joints are correspondingly and electrically connected with the input ends of the power units; and the first secondary side output contact and the second secondary side output contact are correspondingly and electrically connected with the copper bar contacts. Through the frequency converter disclosed by the above, because the current output by the first secondary side output contact and the second secondary side output contact is out-of-phase current, and the plurality of first secondary side output contacts are positioned on the same side, and the plurality of second secondary side output contacts are positioned on the same side, after the second secondary side output contacts and the first secondary side output contacts are correspondingly and electrically connected with the plurality of copper bar contacts through cables, corona discharge generated by the out-of-phase cable lap joint can be effectively avoided, further damage to a cable insulating layer due to corona discharge is avoided, and electric short circuit is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a frequency converter according to an embodiment of the present utility model;

fig. 2 is a top view of a frequency converter according to an embodiment of the present utility model.

The phase-shifting transformer comprises a first cabinet body 1, a second cabinet body 2, a phase-shifting transformer 3, a first secondary side output contact 31, a second secondary side output contact 32, a copper bar contact 4, a power unit 5, a protective cover 6 and a cable 7.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

An embodiment of the present utility model provides a frequency converter, referring to fig. 1 to 2, fig. 1 is a schematic structural diagram of the frequency converter, where the frequency converter includes: the phase-shifting device comprises a first cabinet body 1, a second cabinet body 2, a phase-shifting transformer 3, a plurality of power units 5 and a plurality of copper bar contacts 4;

the phase-shifting transformer 3 is arranged in the first cabinet body 1, a plurality of first secondary side output joints 31 are arranged on the front side of the phase-shifting transformer 3, a plurality of second secondary side output joints 32 are arranged on the rear side of the phase-shifting transformer 3, and currents output by the first secondary side output joints 31 and the second secondary side output joints 32 are out-of-phase currents;

the copper bar contacts 4 and the power units 5 are arranged on the second cabinet body 2, and the copper bar contacts 4 are correspondingly and electrically connected with the input ends of the power units 5;

the first sub-side output contact 31 and the second sub-side output contact 32 are electrically connected to the plurality of copper bar contacts 4.

When the first secondary output contact 31 is connected to the copper bar contact 4, it may be connected by the cable 7 or may be connected by a copper bar.

The first secondary output contact 31 and the second secondary output contact 32 are provided on the front and rear sides of the phase-shifting transformer 3, so that the space of the first cabinet 1 can be fully utilized, and the wiring of the staff can be simplified.

In the embodiment of the utility model, a phase-shifting transformer 3 is arranged in a first cabinet body 1, a plurality of first secondary side output contacts 31 are arranged on the front side of the phase-shifting transformer 3, and a plurality of second secondary side output contacts 32 are arranged on the rear side of the phase-shifting transformer 3; the copper bar contacts 4 and the power units 5 are arranged in the second cabinet body 2, and the copper bar contacts 4 are correspondingly and electrically connected with the input ends of the power units 5; and the first secondary side output contact 31 and the second secondary side output contact 32 are electrically connected to the plurality of copper bar contacts 4. Through the frequency converter disclosed by the above, since the currents output by the first secondary side output contact 31 and the second secondary side output contact 32 are out-of-phase currents, the plurality of first secondary side output contacts 31 are positioned on the same side, and the plurality of second secondary side output contacts 32 are positioned on the same side, after the second secondary side output contacts 32 and the first secondary side output contacts 31 are correspondingly and electrically connected with the plurality of copper bar contacts 4 through the cable 7, corona discharge generated by overlapping the out-of-phase cable 7 can be effectively avoided, and further damage to the insulating layer of the cable 7 due to the corona discharge is avoided, and electrical short circuit is avoided.

Specifically, the plurality of copper bar contacts 4 are all disposed at the top of the second cabinet 2.

It should be noted that, all set up a plurality of copper bar contacts 4 in the top of second cabinet body 2, can effectively promote the radiating effect of copper bar, promote the stability of converter during operation.

Further, the method further comprises the following steps: a protective cover 6 arranged on the second cabinet body 2;

the first copper bar and the second copper bar are both located in the protective cover 6.

It should be noted that, through setting up protection casing 6 at the second cabinet body 2 to set up copper bar contact 4 in protection casing 6, can avoid the foreign matter to lead to a plurality of copper bar contacts 4 to appear the short circuit, effectively promoted the stability of converter during operation.

Specifically, a plurality of power units 5 are arranged in the second cabinet 2.

It should be noted that, a plurality of power units 5 are arranged in the second cabinet body 2, so that the space utilization rate in the second cabinet body 2 can be improved, and the wiring of workers can be facilitated.

The frequency converter provided by the utility model is a high-power frequency converter, so that the power density of the transformer can be improved, the installation volume of the frequency converter can be reduced, the transportation cost of the frequency converter can be further reduced, and the convenience of maintenance can be improved.

The transformer of this application is because set up the secondary output contact by front and back both sides, consequently, after the secondary output contact of both sides is qualified for the next round of competitions around the transformer, but make full use of cabinet body space around, make the secondary line have abundant space of arranging to through the switching behind the right side of unifying leading the transformer cabinet, lead the copper bar contact of power unit through the copper bar at last, form three-layer arrangement, insert each power unit at last, effectively avoid out of phase overlap joint condition to appear.

Because the transformer of this application is by the both sides setting up secondary side output contact around, consequently, the cabinet body internal space at converter place is abundant, and then the secondary side output contact accessible copper bar of both sides links to each other with power unit around the transformer, and then avoids the ageing fracture problem of cable to appear.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. A frequency converter, comprising: the phase-shifting device comprises a first cabinet body, a second cabinet body, a phase-shifting transformer, a plurality of power units and a plurality of copper bar contacts;

the phase-shifting transformer is arranged in the first cabinet body, a plurality of first secondary side output joints are arranged on the front side of the phase-shifting transformer, a plurality of second secondary side output joints are arranged on the rear side of the phase-shifting transformer, and currents output by the first secondary side output joints and the second secondary side output joints are out-of-phase currents;

the copper bar contacts and the power units are arranged on the second cabinet body, and the copper bar contacts are correspondingly and electrically connected with the input ends of the power units;

the first secondary side output contact and the second secondary side output contact are correspondingly and electrically connected with the copper bar contacts.

2. The frequency converter according to claim 1, wherein a plurality of copper bar contacts are disposed on top of the second cabinet.

3. The frequency converter of claim 2, further comprising: the protective cover is arranged on the second cabinet body;

and a plurality of copper bar contacts are all positioned in the protective cover.

4. The frequency converter of claim 1, wherein a plurality of power cells are arrayed in the second cabinet.