CN103812371A

CN103812371A - Auxiliary converter

Info

Publication number: CN103812371A
Application number: CN201210461475.1A
Authority: CN
Inventors: 戴碧君; 张宇; 姜磊
Original assignee: China CNR Corp Ltd
Current assignee: CRRC Yangtze Co Ltd
Priority date: 2012-11-15
Filing date: 2012-11-15
Publication date: 2014-05-21

Abstract

The invention provides an auxiliary converter. The auxiliary converter comprises a direct current fuse protector, a contactor group, an input filter reactor, a support capacitor, two groups of power modules, an output filter and an isolation transformer; the direct current fuse protector, the contactor group and the input filter reactor are sequentially connected to a positive electrode direct current bus in a series mode; the supporting capacitor is connected between the positive electrode direct current bus and a negative electrode direct current bus; direct current input ends of the two groups of power modules are connected with the positive electrode direct current bus and the negative electrode direct current bus; alternating current output ends of the two groups of the power modules are in parallel connection with an input end of the output filter; an output end of the output filter is connected with an input end of the isolation transformer; an output end of the isolation transformer is used for providing electricity for loads. The auxiliary converter has the advantages of reducing costs, improving reliability and not influencing normal operation of railway vehicles due to the fact that the two groups of power modules, a suit of input and output circuit and a cabinet are arranged in the auxiliary converter.

Description

AuCT

Technical field

The present invention relates to current transformer technology, relate 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 for traction blower fan, brake compressor etc. provide power supply.

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 off-load operation, if rail vehicle only arranges separate unit AuCT, this auxiliary converter breaks down, and all assistant loads quit work.

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

Summary of the invention

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

A kind of AuCT provided by the invention, 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 described anodal DC bus and negative pole 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, multiple IGBT device and multiple drive plate;

Described multiple 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 multiple 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.

AuCT provided by the invention, be provided with two groups of power models, in the time that one group of power model breaks down, can be switched to another group power model works on, compared with prior art, owing to being provided with two groups of power models and a set of imput output circuit and cabinet in an AuCT, thereby can reduce costs, and can improve reliability, not affect the normal operation of rail vehicle.

Accompanying drawing explanation

The schematic diagram of the AuCT that Fig. 1 provides for the embodiment of the present invention;

The circuit diagram of the AuCT main circuit importation that Fig. 2 provides for the embodiment of the present invention;

The circuit diagram of the AuCT main circuit output that Fig. 3 provides for the embodiment of the present invention.

Reference numeral:

1-DC fuse; 2-contactor group; 3-input filter reactor;

4-Support Capacitor; 51-the first merit group rate module; 52-the second merit group rate module;

6-output filter; 7-isolating transformer.

Embodiment

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

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, in the time that direct current inlet highway is short-circuited, is realized the protection to two groups of power model main circuits.Support Capacitor 4 can reduce DC bus-bar voltage fluctuation.

The direct-flow input end of two groups of power models is connected with anodal DC bus and negative pole 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, for example IGBT power model, MOSFET power model etc.

Preferably, first group of power model 51 can comprise radiator, control circuit board, multiple IGBT device and multiple drive plate; Multiple IGBT devices are arranged on radiator, and each drive plate is connected with an IGBT device respectively, and control circuit board is connected with multiple 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, 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 flowing on rail vehicle.

In the time that wherein one group of power model breaks down, this power model quits work, and now can be switched to another group power model and work on.

The AuCT that the present embodiment provides, be provided with two groups of power models, in the time that one group of power model breaks down, can be switched to another group power model works on, compared with prior art, owing to being provided with two groups of power models and a set of imput output circuit and 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 the AuCT main circuit importation that Fig. 2 provides for the embodiment of the present invention.

As shown in Figure 2, on the basis of the AuCT providing at above-described embodiment, 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 providing at above-described embodiment, 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 embodiment of the present invention.

As shown in Figure 3, on the basis of the AuCT providing at above-described embodiment, 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.The former limit of three-phase winding self leakage inductance of ac filter electric capacity 61, ac filter inductance 62 and isolating transformer 7, can form LCL (inductor-capacitor-inductance) mode filter, thereby can reduce the harmonic current of two groups of power models injection load-side.

Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.

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, multiple IGBT device and multiple 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;