CN202931223U

CN202931223U - Auxiliary current transformer

Info

Publication number: CN202931223U
Application number: CN 201220605020
Authority: CN
Inventors: 戴碧君; 张宇; 姜磊
Original assignee: CNR Dalian Electric Traction R& D Center Co Ltd
Current assignee: CRRC Yangtze Co Ltd
Priority date: 2012-11-15
Filing date: 2012-11-15
Publication date: 2013-05-08
Anticipated expiration: 2022-11-15

Abstract

The utility model provides an auxiliary current transformer, comprising a direct current fuse, a contactor set, an input filter reactor, a support capacitor, two sets of power modules, an output filter and an isolation transformer. The direct current fuse, the contactor set and the input filter reactor are in series on an anode direct current bus; the support capacitor is connected between the anode direct current bus and the cathode direct current bus; the direct current input terminals of the two sets of power modules are connected with the anode direct current bus and the cathode direct current bus, and the AC output terminals of the two sets of power modules are in parallel with the input terminal of the output filter; the output terminal of the output filter is connected with the input terminal of the isolation transformer; and the output terminal of the isolation transformer is used for supplying power for a load. According to the auxiliary current transformer provided in the utility model, two sets of power modules, one input/output circuit and a cabinet are arranged in one auxiliary current transformer, thereby cost is reduced, the reliability is raised, and the normal operation of a rail vehicle is not influenced.

Description

AuCT

Technical field

The utility model relates to the current transformer technology, relates in particular to a kind of AuCT.

Background technology

AuCT is the important electric component in rail vehicle, and AuCT not only provides power supply for vehicle comfort level load (as air-conditioning and heating even load), also provides power supply for traction blower fan, brake compressor etc.

Existing rail vehicle disposes many AuCTs or the auxiliary configuration of separate unit.If rail vehicle is provided with two AuCTs, wherein an AuCT breaks down, and another AuCT can be expanded power supply and off-load operation, if rail vehicle only arranges the separate unit AuCT, this auxiliary converter breaks down, and all assistant loads quit work.

Existing rail vehicle disposes two AuCTs, and redundancy, realize the safe operation of rail vehicle each other, still, the AuCT of two platform independent is set, and will inevitably increase cost and take larger installing space.

The utility model content

The utility model provides a kind of AuCT, is used for solving the technological deficiency that prior art AuCT cost is high, installing space is large.

A kind of AuCT that the utility model provides comprises dc fuse, contactor group, input filter reactor, Support Capacitor, two groups of power models, output filter and isolating transformers;

Described dc fuse, contactor group and input filter reactor are connected on anodal dc bus successively, and described Support Capacitor is connected between anodal dc bus and negative pole dc bus;

The direct-flow input end of described two groups of power models is connected with the negative pole dc bus with described anodal dc bus, the ac output end of described two groups of power models is in parallel with the input of described output filter, the output of described output filter is connected with the input of described isolating transformer, and the output of described isolating transformer is used for powering to the load.

AuCT as above, preferably, described contactor group comprises main contactor, charging resistor and charging contactor, and described main contactor is connected on described anodal dc bus, and described charging contactor is connected with described charging resistor and be common in parallel with described main contactor.

AuCT as above, preferably, every group of power model comprises radiator, control circuit board, a plurality of IGBT device and a plurality of drive plate;

Described a plurality of IGBT device is arranged on described radiator, and each drive plate is connected with an IGBT device respectively, and described control circuit board is connected with described a plurality of drive plates.

AuCT as above, preferably, described AuCT also comprises a cabinet, and described dc fuse, contactor group, input filter reactor, Support Capacitor, two groups of power models, output filter and isolating transformers are arranged in described cabinet.

AuCT as above, preferably, described output filter comprises three ac filter electric capacity and three ac filter inductance;

Described three ac filter electric capacity are connected in parallel on respectively on the interchange output bus of described two groups of power models, and described three ac filter inductance are connected respectively on the interchange output bus of described two groups of power models.

The AuCT that the utility model provides, be provided with two groups of power models, when one group of power model breaks down, can switch to another group power model works on, with compare in prior art, owing to being provided with two groups of power models and cover imput output circuit and a cabinet in an AuCT, thereby can reduce costs, and can improve reliability, not affect the normal operation of rail vehicle.

Description of drawings

The schematic diagram of the AuCT that Fig. 1 provides for the utility model embodiment;

The circuit diagram of Fig. 2 provides for the utility model embodiment AuCT main circuit importation;

The circuit diagram of the AuCT main circuit output that Fig. 3 provides for the utility model embodiment.

Reference numeral:

The 1-dc fuse; 2-contactor group; 3-input filter reactor;

The 4-Support Capacitor; 51-the first merit group rate module; Second group of power model of 52-;

The 6-output filter; The 7-isolating transformer.

Embodiment

With reference to figure 1, the schematic diagram of the AuCT that Fig. 1 provides for the utility model embodiment.

As shown in Figure 1, the AuCT that the present embodiment provides comprises dc fuse 1, contactor group 2, input filter reactor 3, Support Capacitor 4, two groups of power models, output filter 6 and isolating transformers 7.

Dc fuse 1, contactor group 2 and input filter reactor 3 are connected on anodal dc bus successively, and Support Capacitor 4 is connected between anodal dc bus and negative pole dc bus.Dc fuse 1 is used for realizing the protection to two groups of power model main circuits when the direct current inlet highway is short-circuited.Support Capacitor 4 can reduce the DC bus-bar voltage fluctuation.

The direct-flow input end of two groups of power models is connected with the negative pole dc bus with anodal dc bus, the ac output end of two groups of power models is in parallel with the input of output filter 6, the output of output filter 6 is connected with the input of isolating transformer 7, and the output of isolating transformer 7 is used for powering to the load.Particularly, two groups of power models comprise identical first group of power model 51 and second group of power model 52, first group of power model 51 is in parallel with second group of power model 52, first group of power model 51 and second group of power model 52 can be multiple semi-conductor power module, IGBT power model for example, MOSFET power model etc.

Preferably, first group of power model 51 can comprise radiator, control circuit board, a plurality of IGBT device and a plurality of drive plate; A plurality of IGBT devices are arranged on radiator, and each drive plate is connected with an IGBT device respectively, and control circuit board is connected with a plurality of drive plates.

In actual applications, the direct current of dc bus input is after first group of power model 51 or second group of power model 52 inversion, the output three-phase alternating current, this three-phase alternating current is by after output filter 6 filtering, be transferred to isolating transformer 7, isolating transformer 7 reduces pressure three-phase alternating current and isolates, in the assistant load power supply that flows on rail vehicle.

When wherein one group of power model broke down, this power model quit work, and can switch to another group power model this moment and work on.

The AuCT that the present embodiment provides, be provided with two groups of power models, when one group of power model breaks down, can switch to another group power model works on, with compare in prior art, owing to being provided with two groups of power models and cover imput output circuit and a cabinet in an AuCT, thereby can reduce costs, and can improve reliability, not affect the normal operation of rail vehicle.

With reference to figure 2, the circuit diagram of Fig. 2 provides for the utility model embodiment AuCT main circuit importation.

As shown in Figure 2, on the basis of the AuCT that above-described embodiment provides, further, contactor group 2 comprises main contactor 21, charging resistor 22 and charging contactor 23, main contactor 21 is connected on anodal dc bus, and charging contactor 23 is connected with charging resistor 22 and be common in parallel with main contactor 21.

On the basis of the AuCT that above-described embodiment provides, further, AuCT also comprises a cabinet, and dc fuse 1, contactor group 2, input filter reactor 3, Support Capacitor 4, two groups of power models, output filter and isolating transformers are arranged in cabinet.Each parts of AuCT are arranged in a cabinet, can reduce the shared installing space of AuCT.

With reference to figure 3, the circuit diagram of the AuCT main circuit output that Fig. 3 provides for the utility model embodiment.

As shown in Figure 3, on the basis of the AuCT that above-described embodiment provides, further, output filter 6 comprises three ac filter electric capacity 61 and three ac filter inductance 62; Three ac filter electric capacity 61 are connected in parallel on respectively on the interchange output bus of two groups of power models, and three ac filter inductance 62 are connected respectively on the interchange output bus of two groups of power models.Three-phase former limit winding self leakage inductance of ac filter electric capacity 61, ac filter inductance 62 and isolating transformer 7 can consist of LCL (inductor-capacitor-inductance) mode filter, thereby can reduce the harmonic current that two groups of power models inject load-side.

It should be noted that at last: above each embodiment is not intended to limit only in order to the technical solution of the utility model to be described; Although with reference to aforementioned each embodiment, the utility model is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of each embodiment technical scheme of the utility model.

Claims

1. an AuCT, is characterized in that, comprises dc fuse, contactor group, input filter reactor, Support Capacitor, two groups of power models, output filter and isolating transformers;

2. AuCT according to claim 1, it is characterized in that, described contactor group comprises main contactor, charging resistor and charging contactor, described main contactor is connected on described anodal dc bus, and described charging contactor is connected with described charging resistor and be common in parallel with described main contactor.

3. AuCT according to claim 1 and 2, is characterized in that, every group of power model comprises radiator, control circuit board, a plurality of IGBT device and a plurality of drive plate;

4. AuCT according to claim 1 and 2, it is characterized in that, described AuCT also comprises a cabinet, and described dc fuse, contactor group, input filter reactor, Support Capacitor, two groups of power models, output filter and isolating transformers are arranged in described cabinet.

5. AuCT according to claim 1 and 2, is characterized in that, described output filter comprises three ac filter electric capacity and three ac filter inductance;