CN217388550U - Auxiliary power module - Google Patents

Abstract

The embodiment of the utility model provides a belong to train auxiliary current transformer technical field, especially relate to an auxiliary power module for solve among the prior art the great technical problem of occupation space of auxiliary power module in auxiliary current transformer. The auxiliary power module comprises a rack, a radiator arranged in the rack, a first IGBT module and a second IGBT module, wherein the first IGBT module and the second IGBT module are both installed on the radiator, an input port of the first IGBT module and an output port of the second IGBT module are respectively electrically connected with an external circuit through a bus, and the output port of the first IGBT module and the input port of the second IGBT module are connected together through a busbar. The first IGBT module and the second IGBT module are installed on the same radiator, so that the occupied space of the auxiliary power module in the auxiliary converter is reduced, and the integration of the auxiliary power module is improved.

Description

Auxiliary power module

Technical Field

The embodiment of the utility model provides a belong to train auxiliary current transformer technical field, especially relate to an auxiliary power module.

Background

The auxiliary converter is one of important equipment of the train, and has the main function of converting single-phase alternating current into three-phase alternating current to provide power for an air conditioning system, an air compressor, a storage battery charger and the like of the train. The auxiliary power module is one of core components of the auxiliary converter, and generally comprises an independent detachable whole body consisting of an IGBT, a radiator, a supporting capacitor, a busbar, a driving part and other parts.

In the related art, the auxiliary converter is required to be respectively provided with a rectification power module and an inversion power module in the two conversion functions of rectification and inversion. However, the two power modules occupy a large space inside the auxiliary converter.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides an auxiliary power module solves among the prior art the big technical problem of auxiliary power module at the inside occupation space of auxiliary converter.

The utility model provides an auxiliary power module, be in including frame and setting radiator, first IGBT module and second IGBT module in the frame, first IGBT module with the second IGBT module is all installed on the radiator, the input port of first IGBT module and the output port of second IGBT module is connected with the external circuit electricity through the generating line respectively, the output port of first IGBT module with the input port of second IGBT module links together through female arranging.

In a possible implementation manner, the first IGBT module and the second IGBT module are both connected to a heat dissipation substrate of the heat sink, the second IGBT module is located in the middle of the heat dissipation substrate, and the first IGBT module is located at an edge of the second IGBT module.

In a possible implementation manner, the busbar comprises a first part and a second part, an extension plane of the second part is perpendicular to an extension plane of the first part, and the second part and the first part are integrally formed; the first portion is provided with a first faying surface, and the first faying surface is electrically connected with the first IGBT module and the second IGBT module.

In one possible implementation, the surfaces of the first and second portions are provided with an insulating film.

In a possible implementation manner, the device further comprises a support frame and a capacitor, wherein the support frame is connected with the rack, and the capacitor is mounted on the support frame; the second part is provided with a second lapping surface, and the electric end of the capacitor is electrically connected with the second lapping surface.

In a possible implementation manner, the heat dissipation substrate further includes a discharge resistor, the discharge resistor is disposed on the heat dissipation substrate, and the discharge resistor and the capacitor are electrically connected through the busbar.

In a possible implementation manner, the power supply further comprises a first current sensor and a second current sensor mounted on the support frame, the first current sensor and the second current sensor are arranged on the bus in a penetrating manner, the first current sensor is configured to detect an input current of the first IGBT module, and the second current sensor is configured to detect an output current of the second IGBT module.

In a possible implementation manner, the power supply further comprises a fixing frame, a first driving module and a second driving module, wherein the fixing frame is connected with the rack and the supporting frame, the first driving module and the second driving module are respectively installed on the fixing frame, the first driving module is electrically connected with the first IGBT module, and the second driving module is electrically connected with the second IGBT module.

In a possible implementation manner, the bus bar further comprises a voltage sensor, the voltage sensor is arranged between the first driving module and the second driving module, and the voltage sensor is electrically connected with the bus bar.

In one possible implementation, the first IGBT module and/or the second IGBT module are dual-transistor IGBT modules.

The embodiment of the utility model provides an auxiliary power module, including frame and radiator, first IGBT module and the second IGBT module of setting in the frame, first IGBT module and second IGBT module are all installed on the radiator, and the input port of first IGBT module and the output port of second IGBT module are connected with the external circuit electricity through the generating line respectively, and the output port of first IGBT module links together through female arranging with the input port of second IGBT module. The first IGBT module and the second IGBT module are installed on the same radiator, so that the occupied space of the auxiliary power module in the auxiliary converter is reduced, and the integration of the auxiliary power module is improved.

Drawings

The above and other objects, features and advantages of the embodiments of the present invention will become more readily understood from the following detailed description with reference to the accompanying drawings. Embodiments of the invention will be described, by way of example and not by way of limitation, in the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of an auxiliary power module according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an auxiliary power module according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a first IGBT module and a second IGBT module in an auxiliary power module according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a support frame in an auxiliary power module according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a fixing frame in an auxiliary power module according to an embodiment of the present invention.

Reference numerals are as follows:

10. a frame;

11. a first plate;

12. a second plate;

20. a heat sink;

21. a heat dissipating substrate;

22. a heat dissipating fin;

31. a bus bar;

32. a busbar;

321. a connecting plate;

322. a second section;

3221. a second faying surface;

40. a support frame;

50. a capacitor;

51. a discharge resistor;

52. a first current sensor;

53. a second current sensor;

54. a voltage sensor;

61. a first driving module;

62. a second driving module;

71. a first fixing frame;

72. a second fixing frame;

81. a first IGBT module;

82. and a second IGBT module.

Detailed Description

In the related art, the auxiliary power module includes a rectification power module and an inversion power module, and both the rectification power module and the inversion power module are installed in the auxiliary converter box. The rectification power module and the inversion power module are respectively provided with different radiators, and the auxiliary converter box occupies a larger space, so that the integration of the auxiliary power module is not improved.

In view of this, the embodiment of the utility model provides an auxiliary power module, including frame and radiator, first IGBT module and the second IGBT module of setting in the frame, first IGBT module and second IGBT module are all installed on the radiator, and the input port of first IGBT module and the output port of second IGBT module are connected with the external circuit electricity through the generating line respectively, and the output port of first IGBT module links together through female arranging with the input port of second IGBT module. The first IGBT module and the second IGBT module are installed on the same radiator, so that the occupied space of the auxiliary power module in the auxiliary converter is reduced, and the integration of the auxiliary power module is improved.

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Referring to fig. 1 to 3, an embodiment of the present invention provides an auxiliary power module, which includes a frame 10 and a heat sink 20, a first IGBT module 81 and a second IGBT module 82 disposed in the frame 10. Wherein, the IGBT (insulated Gate Bipolar transistor) is an insulated Gate Bipolar transistor, and the IGBT module is a composite power device.

Illustratively, the rack 10 includes a first plate 11 and a second plate 12 disposed on both sides of the first plate 11, the second plate 12 and the first plate 11 can be substantially enclosed to form a "U" shape, and the extension plane of the second plate 12 is perpendicular to the extension plane of the first plate 11.

In this embodiment, a side of the first plate 11 facing the second plate 12 is regarded as an inner side of the frame 10, and a side of the first plate 11 facing away from the second plate 12 is regarded as an outer side of the frame 10. The heat sink 20 includes a heat dissipating base plate 21 and heat dissipating fins 22 connected to the heat dissipating base plate 21, the heat sink 20 is connected to the first plate 11 and is inserted into the first plate 11, so that the heat dissipating fins 22 are located outside the rack 10, and the heat dissipating base plate 21 is located inside the rack 10. The first IGBT module 81 and the second IGBT module 82 are both located inside the rack 10, and are both connected to the heat dissipation substrate 21, so that the first IGBT module 81 and the second IGBT module 82 can dissipate heat through the heat sink 20.

In this embodiment, the first IGBT module 81 is an IGBT module for rectification, and the second IGBT module 82 is an IBGT module for inversion. The input port of the first IGBT module 81 and the output port of the second IGBT module 82 are electrically connected to an external circuit through the bus bar 31, respectively, and the output port of the first IGBT module 81 and the input port of the second IGBT module 82 are connected together through the bus bar 32. In a specific embodiment, the input port of the first IGBT module 81 is electrically connected to a contactor in the converter, and the output port of the second IGBT module 82 is electrically connected to a reactor in the converter.

Through the arrangement, after the current of the external circuit enters through the input port of the first IGBT module 81, the first IGBT module 81 converts the alternating current into the direct current, the current enters through the output port of the first IGBT module 81 and the intermediate circuit into the input port of the second IGBT module 82, the direct current is converted into the alternating current by the second IGBT module 82, and finally the alternating current is output through the output port of the second IGBT module 82. Through the arrangement, the first IGBT module 81 and the second IGBT module 82 are installed on the same radiator 20, and the auxiliary power module can realize two functions of inversion and rectification.

The embodiment of the utility model provides an auxiliary power module, including frame 10 and the radiator 20 of setting in frame 10, first IGBT module 81 and second IGBT module 82, first IGBT module 81 all installs on radiator 20 with second IGBT module 82, and the input port of first IGBT module 81 and the output port of second IGBT module 82 are connected with the external circuit electricity through generating line 31 respectively, and the output port of first IGBT module 81 links together through female the arranging 32 with the input port of second IGBT module 82. By mounting the first IGBT module 81 and the second IGBT module 82 on the same heat sink 20, the occupied space of the auxiliary power module structure is advantageously reduced, and the integration of the auxiliary power module is improved.

Referring to fig. 3, in this embodiment, a plurality of first IGBT modules 81 and a plurality of second IGBT modules 82 may be mounted on the heat dissipation substrate 21, and the plurality of first IGBT modules 81 may be arranged on the heat dissipation substrate 21 in an array, and the plurality of second IGBT modules 82 may also be arranged on the heat dissipation substrate 21 in an array.

With continued reference to fig. 3, the second IGBT module 82 may be located in the middle of the heat dissipation substrate 21, and the first IGBT module 81 may be located at the edge of the second IGBT module 82. Illustratively, the plurality of second IGBT modules 82 are arranged in an array in the middle of the heat dissipation substrate 21, a portion of the first IGBT modules 81 are arranged in an array on the left side of the second IGBT modules 82, and a portion of the first IGBT modules 81 are arranged in an array on the right side of the second IGBT modules 82. Accordingly, a plurality of bus bars 31 are provided in the auxiliary power module, one end of each bus bar 31 is connected to an input port of the corresponding first IGBT module 81 or an output port of the corresponding second IGBT module 82, and the other end of each bus bar 31 is connected to an external circuit. In some embodiments, the bus bar 31 may be, for example, a copper bus bar 31, in order to further improve the reliability of the electrical connection.

It should be noted that the distribution of the heat dissipation air volume of the heat sink 20 is not uniform, and generally, the heat dissipation air volume of the middle portion of the heat sink 20 is larger than the heat dissipation air volume of the edge of the heat sink 20. In this embodiment, the first IGBT module 81 is a rectifying IGBT module, the second IGBT module 82 is an inverting IBGT module, and the heat flux density of the inverting IBGT module is greater than the heat flux density of the rectifying IGBT module. Through setting up second IGBT module 82 in the middle part of heat dissipation base plate 21, first IGBT module 81 sets up the edge at second IGBT module 82, is favorable to reducing the heat dissipation base plate 21 difference in temperature of radiator 20, and then avoids IGBT module's electrical performance to descend. Furthermore, through the arrangement, the installation process of the modules in the auxiliary power module is simplified, the material cost is reduced, and meanwhile, the size and the weight of the auxiliary power module are reduced.

In a specific implementation, the first IGBT module 81 and/or the second IGBT module 82 are dual-transistor IGBT modules. The double-tube IGBT module can reduce the number of the IGBTs by a half, and further improves the miniaturization and the light weight of the auxiliary power module structure.

Referring to fig. 1, the bus bar 32 includes a first portion (not shown) and a second portion 322, and an extension plane of the second portion 322 is perpendicular to an extension plane of the first portion. The first portion is provided with first bonding surfaces (not shown in the drawings) which are bonded to the first IGBT module 81 and the second IGBT module 82, so that the first portion is electrically connected to the first IGBT module 81 and the second IGBT module 82. For example, the extension plane of the first portion may be parallel to the plane of the first flat plate 11, and the first lapping surface of the first portion may be lapped on the output port of the first IGBT module 81 and the input port of the second IGBT module 82, respectively, so that the bus bar 32 is connected with the output port of the first IGBT module 81 and the input port of the second IGBT module 82. With the arrangement, the inductance of the commutation circuit is favorably reduced, so that the impact of the turn-off overvoltage on the first IGBT module 81 and the second IGBT module 82 is reduced.

The second portion 322 is substantially a flat plate structure, and the extending direction of the flat plate structure is perpendicular to the first flat plate 11, and the extending plane of the flat plate structure is perpendicular to the extending plane of the first portion. In one particular implementation, the second portion 322 is integrally formed with the first portion. For example, the second portion 322 and the first portion may be obtained by press-forming a copper plate, which may have a thickness of, for example, 1.5 mm.

Optionally, the surfaces of the first portion and the second portion 322 are provided with an insulating film to prevent the first portion and the second portion 322 from making electrical contact with other devices, thereby achieving an insulating effect. In a specific implementation manner, the insulating film may be a PET insulating film, and the PET insulating film may be respectively laminated on the surfaces of the first portion and the second portion 322 so as to further improve the insulating effect of the first portion and the second portion 322. Of course, in some other embodiments, the insulating film may be formed on the surfaces of the first portion and the second portion 322 by using other insulating materials, for example, the insulating material may be Nomex (meta-aramid fiber, also called aramid 1313) or PI (Polyimide), which have high insulating performance and are beneficial to improving the insulating effect of the first portion and the second portion 322.

Referring to fig. 4 and 5, the auxiliary power module may further include a support bracket 40 and a capacitor 50, and both the support bracket 40 and the capacitor 50 are located inside the rack 10. Illustratively, the supporting frame 40 is a substantially L-shaped flat plate, and the extending direction of the supporting frame 40 is parallel to the first flat plate 11. Two ends of the supporting frame 40 are respectively connected with the second plate 12 of the rack 10, and the capacitor 50 is mounted on the supporting frame 40, so that the capacitor 50 is mounted on the rack 10 through the supporting frame 40. The second portion 322 of the busbar 32 is further provided with a second bridging surface 3221, and the electrical end of the capacitor 50 is electrically connected to the busbar 32 through the second bridging surface 3221, so that the capacitor 50 is connected to the intermediate circuit of the first IGBT module 81 and the second IGBT module 82.

Referring to fig. 2 and 3, the auxiliary power module further includes a discharge resistor 51, the discharge resistor 51 is disposed on the heat dissipation substrate 21, and the discharge resistor 51 is electrically connected to the capacitor 50 through the bus bar 32, so that the discharge resistor 51 can consume the charge amount in the capacitor 50 after the auxiliary converter finishes operating.

In this embodiment, the discharge resistor 51 is a flat plate heat dissipation type thick film resistor. The flat radiating thick film resistor uses planar structure material inside, which is beneficial to increasing the radiating area of the device; the periphery of the flat plate heat dissipation type thick film resistor is encapsulated with an insulating material, so that heat dissipated by the flat plate heat dissipation type thick film resistor is prevented from being diffused to the periphery; the bottom of the flat plate heat dissipation type thick film resistor is provided with a metal substrate with high heat conductivity coefficient, and the metal substrate is arranged on the heat dissipation substrate 21, so that the heat dissipated by the flat plate heat dissipation type thick film resistor can be dissipated by the heat dissipation fins 22 of the heat sink 20. The flat plate heat dissipation type thick film resistor also has the advantages of high resistor density and small size, and is favorable for further reducing the occupied space of the auxiliary power module.

Of course, in some other embodiments, the discharge resistor 51 may also be a structure that is common in the related art, such as a natural cooling winding resistor, and the like, and is not limited herein.

Referring to fig. 4, the auxiliary power module further includes a first current sensor 52 and a second current sensor 53 mounted on the support frame 40, the first current sensor 52 and the second current sensor 53 are disposed on the bus bar 31, the first current sensor 52 is configured to detect an input current of the first IGBT module 81, and the second current sensor 53 is configured to detect an output current of the second IGBT module 82.

It is worth noting that the first current sensor 52 and the second current sensor 53 may be hall current sensors, which enable current measurement by measuring a magnetic field generated around a conductor. In this embodiment, one end of the partial bus bar 31 is electrically connected to an input port for detecting the first IGBT module 81, and the first current sensor 52 is inserted into the bus bar 31 so that the first current sensor 52 can detect the input current of the first IGBT module 81. Similarly, one end of the partial bus bar 31 is electrically connected to an output port for detecting the second IGBT module 82, and the second current sensor 53 is provided through the bus bar 31 so that the second current sensor 53 can detect the output current of the second IGBT module 82.

By arranging the first current sensor 52 and the second current sensor 53, the detection of the input current of the first IGBT module 81 and the output current of the second IGBT module 82 is facilitated, and corresponding protective measures can be timely adopted by the system when the first IGBT module 81 and the second IGBT module 82 are over-current. Further, the hall current sensor may be disposed on the bus bar 31, which is beneficial to reducing the occupied space of the first current sensor 52 and the second current sensor 53.

Of course, in some other embodiments, the first current sensor 52 and the second current sensor 53 may also have other structures commonly found in the related art, and are not limited herein.

Referring to fig. 1, the auxiliary power module further includes a fixing bracket, a first driving module 61, and a second driving module 62. As shown in fig. 5, the fixing frame includes a first fixing frame 71 and a second fixing frame 72, an extending direction of the first fixing frame 71 is parallel to an extending direction of the second fixing frame 72, two ends of the first fixing frame 71 are respectively connected to the second plate 12, and the second fixing frame 72 is disposed on the supporting frame 40. The first driving module 61 and the second driving module 62 are respectively mounted on a fixing frame, so that the first driving module 61 and the second driving module 62 are mounted on the rack 10 through the fixing frame. The first driving module 61 is electrically connected to the first IGBT module 81 so that the first driving module 61 can drive the first IGBT module 81, and similarly, the second driving module 62 is electrically connected to the second IGBT module 82 so that the second driving module 62 can drive the second IGBT module 82.

As shown in fig. 1, the auxiliary power module also includes a voltage sensor 54. A bracket is further provided between the first driving module 61 and the second driving module 62, and the voltage sensor 54 is mounted therebetween such that the voltage sensor 54 is disposed between the first driving module 61 and the second driving module 62.

It is worth to say that, the end of the second portion 322 that deviates from the first portion is further provided with a connecting plate 321, and the voltage sensor 54 can be electrically connected with the connecting plate 321, so that the voltage sensor 54 is electrically connected with the busbar 32, and further the voltage sensor 54 can detect the voltage of the intermediate circuit of the first IGBT module 81 and the second IGBT module 82, which is beneficial to timely purchasing corresponding protective measures when the intermediate voltage is over-voltage, and meanwhile, the voltage sensor can also stabilize the intermediate voltage through the control circuit. Further, the voltage sensor 54 is disposed between the first driving module 61 and the second driving module 62, which is beneficial to reducing the occupied space of the voltage sensor 54.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims (10)

1. The auxiliary power module is characterized by comprising a rack, a radiator, a first IGBT module and a second IGBT module, wherein the radiator, the first IGBT module and the second IGBT module are arranged on the rack, the first IGBT module and the second IGBT module are arranged on the radiator, an input port of the first IGBT module and an output port of the second IGBT module are respectively and electrically connected with an external circuit through a bus, and an output port of the first IGBT module and an input port of the second IGBT module are connected together through a busbar.

2. The auxiliary power module of claim 1, wherein the first IGBT module and the second IGBT module are both connected to a heat dissipation substrate of the heat sink, the second IGBT module is located in a middle portion of the heat dissipation substrate, and the first IGBT module is located at an edge of the second IGBT module.

3. The auxiliary power module according to claim 2, wherein the busbar comprises a first portion and a second portion, an extension plane of the second portion is perpendicular to an extension plane of the first portion, and the second portion is integrally formed with the first portion; the first portion is provided with a first faying surface, and the first faying surface is electrically connected with the first IGBT module and the second IGBT module.

4. The auxiliary power module according to claim 3, wherein surfaces of the first portion and the second portion are provided with an insulating film.

5. The auxiliary power module according to any one of claims 3-4, further comprising a support frame and a capacitor, the support frame being connected to the chassis, the capacitor being mounted on the support frame; the second part is provided with a second lapping surface, and the electric end of the capacitor is electrically connected with the second lapping surface.

6. The auxiliary power module according to claim 5, further comprising a discharge resistor disposed on the heat dissipation substrate, the discharge resistor being electrically connected to the capacitor through the busbar.

7. The auxiliary power module of claim 5, further comprising a first current sensor and a second current sensor mounted on the support frame, the first current sensor and the second current sensor being disposed through the bus, the first current sensor being configured to detect an input current of the first IGBT module, the second current sensor being configured to detect an output current of the second IGBT module.

8. The auxiliary power module according to claim 5, further comprising a fixing frame, a first driving module and a second driving module, wherein the fixing frame is connected with the rack and the supporting frame, the first driving module and the second driving module are respectively mounted on the fixing frame, the first driving module is electrically connected with the first IGBT module, and the second driving module is electrically connected with the second IGBT module.

9. The auxiliary power module of claim 8, further comprising a voltage sensor disposed between the first and second drive modules, the voltage sensor being electrically connected with the busbar.

10. Auxiliary power module according to claim 5, characterized in that the first IGBT module and/or the second IGBT module is a double-tube IGBT module.

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