CN117955349A - Power module, multiplexing converter device, multiplexing circuit device and electric appliance - Google Patents

Abstract

The invention relates to a power module, a multiplexing converter device, a multiplexing circuit device and an electric appliance, relates to the technical field of rail transit converter devices, and is used for solving the problem of poor compatibility of the power module. The power module of the present invention includes: a water cooling plate; the two semiconductor assemblies are respectively arranged at two sides of the water cooling plate; the two laminated busbar are respectively arranged at two sides of the water cooling plate and are electrically connected with the corresponding semiconductor component; the quick-plug busbar connector is electrically connected with the two laminated busbar; the waterway assembly is connected with the inside of the water cooling plate and is used for cooling the water cooling plate; and the copper bar assembly is electrically connected with the two semiconductor assemblies and external equipment. The power module is of modularized design, and the simplification degree of internal components is high and the universality is strong. And the layout design of each component is facilitated, the expandability of the system is enhanced, and the compatibility among different systems is better achieved.

Description

Power module, multiplexing converter device, multiplexing circuit device and electric appliance

Technical Field

The invention relates to the technical field of rail transit converter devices, in particular to a power module, a multiplexing converter device, a multiplexing circuit device and an electric appliance.

Background

With the increasing demand of the rail transportation industry for power of the converter, the power class of the converter is increasing. In order to meet the application requirements of the high-power converter, a semiconductor device with a higher power level can be generally selected for design, or a device serial-parallel connection mode is adopted to improve the capacity of the power unit. However, the power class of the semiconductor device is limited by materials and technologies, and cannot meet all power class requirements, and the higher the power is, the lower the selectivity of the device is, the higher the price is, and the fine design cannot be realized. Therefore, on the basis of the power level of the optional device, the power units are multiplexed to meet the application requirements of a larger power range.

Common multiplexing techniques include both parallel and cascading of power cells. Compared with a single power unit converter realizing the same capacity, the parallel type multiple current converter can select a semiconductor device with smaller current level, and after multiple superposition, each subharmonic part of the network side current is partially counteracted, so that the total current harmonic is reduced, meanwhile, the redundancy of the system can be further improved, a certain fault power unit can be removed, the rest parts work normally, and the reliability of the system is improved. The cascade type multiple current transformer adopts the power units based on the low-voltage class devices to carry out multistage combination, and the intermediate voltages of all stages are balanced through control optimization, so that the application of the low-voltage class devices in the high-voltage field is realized, the improvement of the withstand voltage class and the capacity class is realized, the requirement of the high-power class can be met, and the influence of the complex structure on the product performance can be avoided.

However, the two multiplexing modes have large differences in technology and structure, and the power module in the prior art is limited by the structure, has poor compatibility, and cannot be simultaneously applied to two different multiplexing technologies.

Disclosure of Invention

The invention provides a power module, a multiplexing converter device, a multiplexing circuit device and an electric appliance, which are used for solving the problem of poor compatibility of the power module.

The invention provides a power module, comprising: a water cooling plate; the two semiconductor assemblies are respectively arranged at two sides of the water cooling plate; the two laminated busbar are respectively arranged at two sides of the water cooling plate and are electrically connected with the corresponding semiconductor component; the quick-plug busbar connector is electrically connected with the two laminated busbar and is used for realizing quick electrical connection with external equipment; the waterway assembly is connected with the inside of the water cooling plate and is used for cooling the water cooling plate; and the copper bar assembly is electrically connected with the two semiconductor assemblies and external equipment.

In one embodiment, the two semiconductor assemblies are symmetrically disposed with respect to the water cooled plate.

In one embodiment, a semiconductor assembly includes a single-phase rectifier, a three-phase inverter, and a chopper, wherein the chopper is electrically connected to the single-phase rectifier and the three-phase inverter.

In one embodiment, the copper bar assembly has an a-interface and a B-interface, which are electrically connected with the two branches of the single-phase rectifier, respectively, and/or the copper bar assembly has a CH-interface, which is electrically connected with the circuit of the chopper, and/or the copper bar assembly has a U-interface, a V-interface and a W-interface, which are electrically connected with the three branches of the three-phase inverter, respectively.

In one embodiment, the water cooled plate has an interior cavity and the waterway assembly includes two cooling tubes, one of which is connected to an inlet of the interior cavity and the other of which is connected to an outlet of the interior cavity.

The invention also provides a multiple converter device, comprising: a converter cabinet; the power modules are arranged in the converter cabinet body in a sliding manner along the first direction, and the power modules are arranged at intervals along the second direction; the plurality of supporting capacitors are arranged in the converter cabinet body in a sliding manner along the first direction and are electrically connected with the plurality of power modules in a one-to-one correspondence manner; the connecting busbar is arranged on the converter cabinet body and is electrically connected with the plurality of power modules; the cascade multiple circuit device can be built by adjusting alternating current wiring for connecting the busbar and the power modules.

In one embodiment, the converter further comprises a middle direct current busbar, wherein the middle direct current busbar is arranged on the converter cabinet body and is electrically connected with the plurality of power modules, the connecting busbar is arranged on the middle direct current busbar, and the connecting busbar is electrically connected with the plurality of power modules through the middle direct current busbar; the parallel multiple circuit device can be built by adjusting alternating current wiring for connecting the busbar and the power modules.

The invention also provides a multiplexing circuit device, comprising:

a transformer having a primary winding and a plurality of secondary windings disposed in correspondence with the primary winding; and

The above-described multiple converter device; and

A plurality of three-phase motors;

the three-phase inverter of each power module of the multiple converter device is electrically connected with the corresponding three-phase motor, and the rectifier of each power module of the multiple converter device is electrically connected with the corresponding secondary winding.

The invention also provides a multiplexing circuit device, comprising: a transformer having a primary winding and a secondary winding disposed in correspondence with the primary winding; and

The above-described multiple converter device; and

A plurality of three-phase motors;

The three-phase inverter of each power module of the multiple converter device is electrically connected with the corresponding three-phase motor, and the rectifiers of every two power modules of the multiple converter device are respectively electrically connected with two ends of the corresponding secondary winding.

The invention also provides an electric appliance comprising the multiplexing circuit device or another multiplexing circuit device, wherein the multiplexing circuit device and the other multiplexing circuit device can be mutually converted.

Compared with the prior art, the invention has the advantages that the power module is in modularized design, and the simplification degree of internal parts is high and the universality is strong. And the layout design of each component is facilitated, the expandability of the system is enhanced, and the compatibility among different systems is better achieved.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a power module according to a first embodiment of the present invention;

FIG. 2 is a schematic diagram of another angle (left view) of the power module of FIG. 1;

FIG. 3 is a schematic diagram of another angle (right view) of the power module of FIG. 1;

fig. 4 is a schematic structural diagram of a multiple converter device according to a third embodiment of the present invention;

FIG. 5 is a schematic view of the multiple transformer apparatus of FIG. 4 at another angle;

FIG. 6 is a circuit topology of a parallel multiplexing circuit arrangement according to a fourth embodiment of the invention;

FIG. 7 is a circuit topology of a cascaded multiple circuit arrangement of a fifth embodiment of the invention;

Fig. 8 is a circuit topology of a power module according to a first embodiment of the invention.

Reference numerals:

10. A water cooling plate; 20. a semiconductor component; 30. laminating a busbar; 40. quick-connect busbar connector; 50. a waterway assembly; 60. a copper bar assembly; 100. a power module; 200. a transformer; 201. a main side winding; 202. a secondary winding; 300. a supporting capacitor; 400. connecting a busbar; 500. a middle direct current busbar; 600. a converter cabinet body.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

Example 1

As shown in fig. 1 to 3, the present invention provides a power module 100, which includes a water cooling plate 10, two semiconductor assemblies 20, two stacked busbar 30, a quick-connect busbar connector 40, a waterway assembly 50, and a copper bar assembly 60. Wherein, two semiconductor components 20 are respectively arranged at two sides of the water-cooling plate 10; the two laminated busbar 30 are respectively arranged at two sides of the water-cooling plate 10 and are electrically connected with the corresponding semiconductor component 20; the quick-plug busbar connectors 40 are respectively arranged at two sides of the water-cooling plate 10 and are electrically connected with the two laminated busbar 30, and the quick-plug busbar connectors 40 are used for realizing quick electrical connection with external equipment; the waterway assembly 50 is connected to the inside of the water cooling plate 10 for cooling the water cooling plate 10. The copper bar assembly 60 is electrically connected to the internal and external transformers 200 of the two semiconductor assemblies 20, the traction motor, and the like.

In the above arrangement, the power module 100 is of a modular design, and the simplification of the internal components is high, so that the versatility is high. And the layout design of each component is facilitated, the expandability of the system is enhanced, and the compatibility among different systems is better achieved. In addition, the power module 100 adopts an XHP (English full name: fleXible High Power) standard packaging semiconductor device with relatively higher power density, can be compatible with silicon devices and silicon carbide devices with different power levels, effectively realizes the miniaturization and light weight design of components and systems, and is more beneficial to improving the integration degree of the module.

Specifically, as shown in fig. 1 to 3, in one embodiment, two semiconductor assemblies 20 are disposed symmetrically with respect to the water-cooled plate 10. This optimizes the layout design of the various components within the power module 100.

Specifically, as shown in fig. 8, in one embodiment, the semiconductor assembly 20 includes a single-phase rectifier, a three-phase inverter, and a chopper, wherein the chopper is electrically connected to the single-phase rectifier and the three-phase inverter.

Specifically, as shown in fig. 1-3, in one embodiment, the copper bar assembly 60 has an a-interface and a B-interface that are electrically connected to two legs of the single-phase rectifier, respectively, and/or the copper bar assembly 60 has a CH-interface that is electrically connected to the circuit of the chopper.

Specifically, as shown in fig. 1 to 3, in one embodiment, the copper bar assembly 60 has a U interface, a V interface, and a W interface, which are electrically connected to three legs of the three-phase inverter, respectively.

Specifically, as shown in fig. 1-3, in one embodiment, the water cooled plate 10 has an interior cavity and the waterway assembly 50 includes two cooling tubes, one of which is connected to an inlet of the interior cavity and the other of which is connected to an outlet of the interior cavity.

Example two

As shown in fig. 4 and 5, the present invention provides a multiple current transformer apparatus, which includes a current transformer cabinet 600, the power module 100, a plurality of supporting capacitors 300, and a connection busbar 400. The power modules 100 are slidably disposed in the converter cabinet 600 along a first direction (a direction perpendicular to the paper in fig. 4), and the plurality of power modules 100 are disposed at intervals along a second direction (a horizontal direction in fig. 4); the plurality of supporting capacitors 300 are slidably arranged in the converter cabinet 600 along the first direction and are electrically connected with the plurality of power modules 100 in a one-to-one correspondence manner; the connection busbar 400 is arranged on the converter cabinet 600 and is electrically connected with the plurality of power modules 100; adjusting the ac wiring connecting the busbar 400 to the plurality of power modules 100 enables the construction of a cascaded multiple circuit arrangement.

In the arrangement, the multiple converter device improves the power level of the converter from two dimensions of a device and a system, so that more selectivity and wider application range can be obtained, the complexity of component structure and control can be avoided, and the system and the fine design of the components can be realized. And the multiple converter device integrates all the universal parts, adopts a modularized design, and has high simplification degree of parts and strong universality. And the layout design of each component is facilitated, the modules are installed side by side, the connection between each power unit is facilitated, the expandability of the system is enhanced, and the compatibility between different systems is better achieved. In addition, the multiple converter device can fully exert the high-frequency characteristic of the medium-and-small power device, reduce harmonic components of network side current and acquire better system performance. The power module, the capacitor and other parts are all installed in a drawer type, and the electric connection and the water cooling system are connected in a quick-plug manner, so that the disassembly and assembly time of the parts is saved, and the maintainability of the device is greatly improved.

Example III

As shown in fig. 7, the present invention provides a cascaded multiple circuit device, which includes a transformer 200, the multiple current transformer device, and a plurality of three-phase motors. The transformer 200 has a primary winding 201 and a secondary winding 202 corresponding to the primary winding 201, the three-phase inverter of each power module 100 of the multiple converter device is electrically connected to the corresponding three-phase motor, and the rectifiers of every two power modules 100 of the multiple converter device are electrically connected to two ends of the secondary winding 202.

Specifically, as shown in fig. 7, in one embodiment, the number of the power modules 100 is two (a first power unit and a second power unit), A1 of the first power unit (a first heavy power unit) is connected with a secondary side A1 of the transformer, B1 is connected with A2 of the second power unit (a second heavy power unit), CH1 is connected with a chopper resistor Rch1, U1, V1, W1 is connected with a three-phase motor M1, B2 of the second power unit (a second heavy power unit) is connected with a secondary side x1 of the transformer, CH2 is connected with a chopper resistor Rch2, U2, V2, W2 is connected with the three-phase motor M2, and the connection busbar 400 is removed, so that the two intermediate dc portions are independent of each other, forming a cascade double design, and the cascade multiple design can be realized by increasing the number of the power units.

Example IV

As shown in fig. 6, the present invention provides a parallel multiple circuit device, which includes a transformer 200, the multiple current transformer device and a plurality of three-phase motors. The transformer 200 has one primary winding 201 and two secondary windings 202 corresponding to the one primary winding 201, the three-phase inverter of each power module 100 of the multiple converter device is electrically connected to the corresponding three-phase motor, and the rectifier of each power module 100 of the multiple converter device is electrically connected to the corresponding secondary winding 202.

Specifically, as shown in fig. 6, in one embodiment, the number of the power modules 100 is two (a first power unit and a second power unit), A1 of the first power unit (a first heavy) is connected with the transformer secondary side A1, B1 is connected with the transformer secondary side x1, CH1 is connected with the chopper resistor Rch1, U1, V1, W1 is connected with the three-phase motor M1, A2 of the second power unit (a second heavy) is connected with the transformer secondary side A2, B2 is connected with the transformer secondary side x2, CH2 is connected with the chopper resistor Rch2, U2, V2, W2 is connected with the three-phase motor M2, and the intermediate loops of the two power modules 100 are connected through the connection busbar 400 to form a parallel dual design, so that the number of the power units can be increased and the parallel multiple design can be realized.

Example five

The invention provides a circuit comprising the above-mentioned parallel multiplexing circuit device, wherein the parallel multiplexing circuit device can be converted from the above-mentioned cascade multiplexing circuit device.

The following describes a specific process of converting the cascade multiplexing circuit device into the parallel multiplexing circuit device according to the present application:

The power module 100, the supporting capacitor 300, the middle direct current busbar 500 and other devices do not need to be adjusted, and only part of wiring needs to be adjusted: and B1 is connected with the secondary side x1 of the transformer, A2 is connected with the secondary side A2 of the transformer, B2 is connected with the secondary side x2 of the transformer, and the intermediate loops of the two power modules 100 are connected by the connecting busbar 400, so that the conversion of the circuit device can be completed.

Example six

The invention provides an electric appliance, which comprises the cascade multiplexing circuit device, wherein the cascade multiplexing circuit device can be converted from the parallel multiplexing circuit device. Also only part of the wiring needs to be adjusted: and connecting A1 with the secondary side A1 of the transformer, connecting B1 with A2, and removing redundant wiring and connecting busbar 400 to complete the conversion of the circuit device.

It should be noted that, the multiplexing circuit fuses the two multiplexing modes, and can realize switching between parallel multiplexing and cascade multiplexing applications according to actual requirements. Through multiple designs and the selection of devices with different power levels, the application requirements of higher power can be met, customization and fine design can be carried out according to diversity requirements, and the applicability of the converter device is improved to a greater extent.

The core component of the rail transit multiple converter device of the present invention is the power module 100, and the modular design can improve the assembly and maintenance of the device. The module is based on a two-level circuit topology and adopts a high-integration design, totally comprises 6 semiconductor devices packaged in XHP standard, integrates a single-phase rectifier, a three-phase inverter and a chopper, and can meet the functional requirements of one power module 100 (one weight) of the multiple converter device by one power module and auxiliary equipment.

Moreover, the power module 100 adopts a double-sided cooling technology, uses the water cooling plate 10 as a support, adopts a symmetrical mode to respectively install and fix three semiconductor devices on two sides, ensures good consistency of loops of the devices, is beneficial to installation layout and connection of the module in a converter device, and can effectively reduce stray inductance of a direct current loop by connecting the devices through the laminated busbar 30, thereby reducing peak voltage when the devices are on-off.

Meanwhile, in order to realize the quick assembly and disassembly of the power module, the quick power strip connector 40 is adopted to realize the electrical connection with the system, and the quick water-cooling joint (contained in the waterway assembly 50) is adopted to perform heat exchange with the device water-cooling system.

It should be noted that, while the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, which are merely illustrative, instructive, and not restrictive. For example, the layout mode of each component of the device, the packaging selection mode of the device, the heat dissipation mode of the power module and the structural composition are all within the scope of the design invention.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1.A power module, comprising:

A water cooling plate; and

The two semiconductor assemblies are respectively arranged at two sides of the water cooling plate; and

The two laminated busbar are respectively arranged at two sides of the water cooling plate and are electrically connected with the corresponding semiconductor component; and

The quick-plug busbar connector is electrically connected with the two laminated busbar, and is used for realizing quick electrical connection with external equipment; and

The waterway assembly is connected with the inside of the water cooling plate and is used for cooling the water cooling plate; and

And the copper bar assembly is electrically connected with the two semiconductor assemblies and the external equipment.

2. The power module of claim 1 wherein two of said semiconductor assemblies are symmetrically disposed with respect to said water cooled plate.

3. The power module of claim 2, wherein the semiconductor assembly comprises a single-phase rectifier, a three-phase inverter, and a chopper, wherein the chopper is electrically connected with the single-phase rectifier and the three-phase inverter.

4. A power module according to claim 3, characterized in that the copper bar assembly has an a-interface and a B-interface, which are electrically connected with two branches of the single-phase rectifier, respectively, and/or the copper bar assembly has a CH-interface, which is electrically connected with the circuit of the chopper, and/or the copper bar assembly has a U-interface, a V-interface and a W-interface, which are electrically connected with three branches of the three-phase inverter, respectively.

5. The power module of claim 1 wherein the water cooled plate has an interior cavity and the waterway assembly includes two cooling tubes, one of the cooling tubes being connected to an inlet of the interior cavity and the other cooling tube being connected to an outlet of the interior cavity.

6. A multiple current transformer apparatus, comprising:

a converter cabinet; and

A plurality of power modules according to any one of claims 1 to 5, slidably disposed in the converter cabinet along a first direction, the plurality of power modules being spaced apart along a second direction; and

The plurality of supporting capacitors are arranged in the converter cabinet body in a sliding manner along the first direction and are electrically connected with the plurality of power modules in a one-to-one correspondence manner; and

The connecting busbar is arranged on the converter cabinet body and is electrically connected with the power modules;

the cascade multiple circuit device can be built by adjusting alternating current wiring for connecting the busbar and the power modules.

7. The multiple current transformer apparatus of claim 6, further comprising an intermediate dc busbar disposed on the current transformer cabinet and electrically connected to the plurality of power modules, the connection busbar disposed on the intermediate dc busbar and electrically connected to the plurality of power modules through the intermediate dc busbar; the parallel multiple circuit device can be built by adjusting the alternating current wiring connecting the busbar and the power modules.

8. A multiplexing circuit device, comprising:

a transformer having one main side winding and a plurality of sub side windings provided corresponding to the one main side winding; and

The multiple current transformer apparatus of claim 6; and

A plurality of three-phase motors;

The three-phase inverter of each power module of the multiple converter device is electrically connected with the corresponding three-phase motor, and the rectifier of each power module of the multiple converter device is electrically connected with the corresponding secondary winding.

9. A multiplexing circuit device, comprising:

A transformer having a primary winding and a secondary winding disposed in correspondence with the primary winding; and

The multiple current transformer apparatus of claim 6; and

A plurality of three-phase motors;

the three-phase inverter of each power module of the multiple converter device is electrically connected with the corresponding three-phase motor, and the rectifiers of every two power modules of the multiple converter device are respectively electrically connected with two ends of the corresponding secondary winding.

10. An electrical appliance comprising a multiplexing circuit arrangement as in claim 8 or a multiplexing circuit arrangement as in claim 9, wherein the multiplexing circuit arrangement as in claim 8 is switchable between the parallel multiplexing circuit arrangement as in claim 9.