CN210985931U - High-power DC converter - Google Patents

Abstract

The utility model provides a high-power direct current converter, including the casing to and be located parallelly connected even group transform branch road on the casing, every group transform branch road includes inductance and IGBT module, the output of IGBT module has parallelly connected 1/2 times electric capacity that even group transformed the branch road total number, and all electric capacities distribute with the form of single-row array and constitute single-row capacitor array on the casing, and all groups transform the inductance and the IGBT module of branch road and divide into two sets ofly with equal quantity respectively, and every group inductance constitutes single-row inductor array, and every group IGBT module constitutes single-row IGBT module array, and two sets of single-row inductor arrays and two sets of single-row IGBT module array symmetric distribution are in the both sides of single-row capacitor array, just the single-row inductor array is located the outside of single-. The utility model discloses radiating effect and conversion efficiency can be improved, increase of service life to can realize the redundant control to high-power direct current converter.

Description

High-power DC converter

Technical Field

The utility model relates to a fuel cell system, in particular to high-power direct current converter.

Background

Referring to fig. 1, the existing high-power dc converter comprises a first conversion branch consisting of a first inductor L1 and an IGBT (insulated gate bipolar transistor) module 100, a second conversion branch consisting of a second inductor L2 and an IGBT module 100, and a third conversion branch consisting of a third inductor L03 and an IGBT module 100, at the output of the conversion branch, capacitors of the same number as the conversion branch, i.e., a first capacitor C1, a second capacitor C2 and a third capacitor C3 are connected in parallel between a high-voltage positive terminal VH + and a high-voltage negative terminal VH-are connected, a first inductor L, a second inductor L and a third inductor L are connected in parallel to the output of the conversion branch, wherein the first inductor C1, the second capacitor C2 and the third capacitor C3, at the high-voltage positive terminal VH + and the high-voltage negative terminal VH + when the power output characteristics of the fuel cell system are soft and the current output decreases as the current output increases, thereby achieving a high-power matching and energy distribution, the power distribution between the high-power-system and the high-power-system, the power-system is characterized in that the power-energy-conversion efficiency of the first inductor dc converter 100 is increased by the first inductor switch-conversion branch-conversion-inductor cd conversion-inverter-IGBT power-inverter-.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high-power direct current converter to solve radiating problem.

In order to achieve the above object, the utility model provides a high-power direct current converter, including the casing to and be located parallelly connected even group transform branch road on the casing, every group transform branch road includes inductance and IGBT module, the output of IGBT module has parallelly connected 1/2 times electric capacity that even group transforms the branch road total number, and all electric capacities distribute with the form of single-row array and constitute single-row capacitor array on the casing, and all group transform the inductance and the IGBT module of branch road divide into two sets ofly with equal quantity respectively, and every group inductance constitutes single-row inductor array, and every group IGBT module constitutes single-row IGBT module array, and two sets of single-row inductor arrays and two sets of single-row IGBT module array symmetric distributions are in the both sides of single-row capacitor array, just the single-row inductor array is located the outside of.

Further, the utility model provides a high-power direct current converter, the single file capacitor array distributes on the level of casing or vertical central line.

Further, the utility model provides a high-power direct current converter is provided with the heat dissipation pipeline on being located the casing of every group single file inductance array below, the heat dissipation pipeline has let in the coolant liquid.

Further, the utility model provides a high-power direct current converter is provided with the heat dissipation pipeline on being located the casing of every group single file IGBT module array below, the heat dissipation pipeline has let in the coolant liquid.

Further, the utility model provides a high-power direct current converter, the heat dissipation pipeline is the capillary array.

Further, the utility model provides a high-power direct current converter is located and is provided with the metal fin of being connected with the casing between single file inductance array and the single file IGBT module array, the metal fin is connected with the side contact of single file inductance array.

Further, the utility model provides a high-power direct current converter, the IGBT module of every group transform branch road includes an IGBT pipe and a transistor, and the positive end of low pressure is connected to the one end of the inductance of every group transform branch road, the drain electrode of another termination IGBT pipe of inductance the source electrode of IGBT pipe connects low pressure negative terminal and high pressure negative terminal, the grid of IGBT pipe connects a control signal, and the drain electrode of IGBT pipe still connects the common nodical behind the source electrode of a transistor and the short circuit of grid, the drain electrode of transistor is output termination high pressure positive terminal.

The utility model provides a high-power DC converter during operation, owing to divide into two sets of single file inductance arrays and symmetric distribution in the both sides of single file capacitor array with equal quantity with the inductance in all groups transform the branch road, thereby the heat evenly distributed that makes the inductance during operation produce is on the casing, the condition that accumulates the heat and lead to when can not leading to the distribution of unilateral inductance array reduces conversion efficiency and reduces life's the condition, thereby high-power DC converter's radiating effect and conversion efficiency have been improved, high-power DC converter's life has been prolonged. In addition, when the group conversion branch circuit which is connected in parallel with one side and takes the single-row capacitor array as the center fails, the group conversion branch circuit which is connected in parallel with the other side of the single-row capacitor array can maintain the direct current converter to be in a working state continuously, so that the redundant control of the high-power direct current converter is realized.

Drawings

FIG. 1 is a circuit schematic of a prior art high power DC converter;

fig. 2 is a schematic circuit diagram of a high power dc converter according to an embodiment of the present invention;

fig. 3 is a layout diagram of electronic components of the high-power dc converter according to an embodiment of the present invention distributed in the housing;

FIG. 4 is a partial layout view of FIG. 3;

FIG. 5 is a schematic cross-sectional view of FIG. 4;

shown in the figure:

l1, a first inductor, L2, a second inductor, L3, a third inductor, L4, a fourth inductor, L5, a first inductor, L6 and a sixth inductor;

the IGBT comprises a T1, a first IGBT tube, a T2, a second IGBT tube, a T3, a third IGBT tube, a T4, a fourth IGBT tube, a T5, a fifth IGBT tube, a T6 and a sixth IGBT tube;

q1, a first transistor, Q2, a second transistor, Q3, a third transistor, Q4, a fourth transistor, Q5, a fifth transistor, Q6, a sixth transistor;

c1, a first capacitor, C2, a second capacitor, C3 and a third capacitor;

100. the IGBT module 200, the shell 201 and the heat dissipation pipeline;

k1, a first control signal, K2, a second control signal, K3, a third control signal, K4, a fourth control signal, K5, a fifth control signal, K6, and a sixth control signal.

Detailed Description

The high power dc converter proposed by the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

Referring to fig. 2, the embodiment of the present invention provides a high power dc converter, which includes a low voltage positive terminal V L +, a low voltage negative terminal V L-, a high voltage positive terminal VH + and a high voltage negative terminal VH-, and an even number group conversion branch connected in parallel between the low voltage positive terminal V L +, the low voltage negative terminal V L-and the high voltage positive terminal VH +, the high voltage negative terminal VH-, and the high voltage negative terminal VH-and connected with 1/2 times of capacitors of the total number of the even number group conversion branch for filtering voltage ripples.

The utility model discloses even group transform branch road is parallel relation, explains below with six groups transform branch roads as the example, and wherein the circuit structure of branch road is transformed to the sixth group to first group transform branch road, has used different reference numerals for the convenience of distinguishing. The first set of conversion branches is taken as an example for detailed description.

Referring to fig. 2, the first group of conversion branches includes a first inductor L1 and an IGBT module 100, one end of the first inductor L1 is connected to the low-voltage positive terminal V L +, the other end of the first inductor L1 is connected to the drain of the first IGBT T1, the source of the first IGBT T1 is connected to the low-voltage negative terminal V L-and the high-voltage negative terminal VH-, the gate of the first IGBT T1 is connected to the first control signal K1, the drain of the first IGBT T1 is further connected to the short-circuited common intersection of the source and the gate of the first transistor Q1, and the drain of the first transistor Q1 is connected to the high-voltage positive terminal VH +, wherein the first IGBT T1 and the first transistor Q1 and their connection relationship constitute the IGBT module 100 of the group of conversion branches.

The second group of conversion branches comprises a second inductor L2 and an IGBT module 100, the group of IGBT module 100 comprises a second IGBT tube T2, a second transistor Q2 and a connection relation of the second IGBT tube T2 and the second transistor Q2, and the grid electrode of the second IGBT tube T2 is connected with a second control signal K2.

The third group of conversion branches comprises a third inductor L3 and an IGBT module 100, the IGBT module 100 comprises a third IGBT tube T3 and a third transistor Q3 and their connection relationship, and the gate of the third IGBT tube T3 is connected to a third control signal K3.

The fourth group of conversion branches comprises a fourth inductor L4 and an IGBT module 100, the IGBT module 100 comprises a fourth IGBT tube T4, a fourth transistor Q4 and a connection relation of the fourth IGBT tube T4 and the fourth transistor Q4, and the grid electrode of the fourth IGBT tube T4 is connected with a fourth control signal K4.

The fifth group of conversion branches comprises a fifth inductor L5 and an IGBT module 100, the IGBT module 100 comprises a fifth IGBT tube T5, a fifth transistor Q5 and a connection relation of the fifth IGBT tube T5 and the fifth transistor Q5, and the grid electrode of the fifth IGBT tube T5 is connected with a fifth control signal K5.

The sixth group of conversion branches comprises a sixth inductor L6 and an IGBT module 100, the group of IGBT module 100 comprises a sixth IGBT tube T6 and a sixth transistor Q6 and a connection relation thereof, and the grid electrode of the sixth IGBT tube T6 is connected with a sixth control signal K6.

And a first capacitor C1, a second capacitor C2 and a third capacitor C3 for filtering voltage ripples are connected in parallel between the high-voltage positive end VH + and the high-voltage negative end VH-.

The utility model discloses first control signal is K1 to K6 for pulse signal, thereby accomplishes low pressure to highly compressed direct current energy transformation through opening and turn-off time and phase control to first to sixth control signal K1-K6.

Referring to fig. 3 to 4, the high power dc converter of the embodiment of the invention further includes a housing 200, the first to sixth transforming branches are disposed on the housing 200, the first to third capacitors C1 to C3 are distributed on the horizontal center line of the housing 200 to form a single-row capacitor array, the first to sixth inductors L1 to L6 of the first to sixth transforming branches are divided into two groups in equal number, each group of inductors forms a single-row inductor array, and the two single-row inductor arrays are symmetrically distributed on both sides of the single-row capacitor array.

Referring to fig. 3 and fig. 4, in the embodiment of the present invention, the first inductor L1, the IGBT module 100, the fourth inductor L4, and the IGBT module 100 are symmetrically distributed and disposed with the first capacitor C1 as a center, the second inductor L2, the IGBT module 100, the fifth inductor L5, and the IGBT module 100 are symmetrically distributed and disposed with the second capacitor C2 as a center, and the third inductor L3, the IGBT module 100, the sixth inductor L6, and the IGBT module 100 are symmetrically distributed and disposed with the third capacitor C3 as a center.

The utility model discloses high-power DC converter during operation, it is in operating condition to change the branch road to the sixth group through first to sixth control signal K1-K6 control first group, then the heat that the electric current of first inductance L1 to sixth inductance L6 produced owing to distribute in the both sides of single-row capacitor array with single-row inductance array as the unit, thereby make the heat evenly distributed that first inductance L1 to sixth inductance L6 during operation produced in the both sides of casing 200, can not lead to the unilateral to gather thermal condition, thereby improve this high-power DC converter's radiating effect, and then conversion efficiency and life have been improved.

Referring to fig. 5, in order to further improve the heat dissipation effect, the embodiment of the present invention may be provided with a heat dissipation pipe on the housing below the single-row inductor array and the single-row IGBT module array, and the heat dissipation pipe may be filled with a cooling liquid such as water. The heat generated by the inductors in the single-row inductor array and the heat generated by the IGBT modules in the single-row IGBT module array are taken away through the cooling liquid, and the purpose of heat dissipation is achieved. In order to achieve the purpose of uniform heat dissipation, the heat dissipation pipeline can be in a structure of a plurality of capillary arrays connected in parallel.

In order to further improve the heat dissipation effect, the embodiment of the present invention can cover all the other five sides of every inductance except the bottom surface, for example, the metal heat sink of aluminum alloy, especially can replace the face between inductance and the IGBT module 100 by the heat insulating material for the metal heat sink, and this five sides metal heat sink can contact with casing 200 to carry out the piece heat dissipation through the metal heat dissipation with the heat that the inductance during operation produced. Particularly, a metal radiating fin connected with the shell is arranged between the single-row inductor array and the single-row IGBT module array, and the metal radiating fin is in contact connection with the side face of the single-row inductor array so as to improve the radiating effect of the inductor.

The embodiment of the utility model provides a high-power DC converter is not limited to six groups and changes the branch road, can dispose as required, for example four groups, eight groups, ten groups etc.. The high-power dc converter is not limited to the low-to-high voltage step-up dc converter, and may be a high-to-low voltage step-down dc converter.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all included in the protection scope of the present invention.

Claims (7)

1. The high-power direct-current converter is characterized by comprising a shell and even-numbered groups of conversion branches which are positioned on the shell in parallel, wherein each group of conversion branches comprises inductors and IGBT modules, the output end of each IGBT module is connected with 1/2 times of capacitors of the total number of the even-numbered groups of conversion branches in parallel, all the capacitors are distributed on the shell in a single-row array mode to form a single-row capacitor array, the inductors and the IGBT modules of all the groups of conversion branches are divided into two groups in equal quantity, each group of inductors form a single-row inductor array, each group of IGBT modules form a single-row IGBT module array, the two groups of single-row inductor arrays and the two groups of single-row IGBT module arrays are symmetrically distributed on two sides of the single-row capacitor array, and the single-.

2. The high power dc converter according to claim 1, wherein the single row capacitor array is distributed on a horizontal or vertical centerline of the housing.

3. The high power dc converter according to claim 1, wherein a heat dissipation duct is disposed on the housing under each set of single row inductor arrays, and the heat dissipation duct is filled with a cooling fluid.

4. The high power dc converter according to claim 1, wherein a heat dissipation duct is disposed on the housing under each single row IGBT module array, and the heat dissipation duct is filled with a cooling liquid.

5. The high power dc converter according to claim 3 or 4, wherein the heat dissipation conduit is a capillary array.

6. The high power dc converter according to claim 1, wherein a metal heat sink connected to the housing is disposed between the single row of inductor arrays and the single row of IGBT module arrays, and the metal heat sink is connected in contact with the side of the single row of inductor arrays.

7. The high-power direct-current converter according to claim 1, wherein the IGBT module of each group of conversion branches comprises an IGBT tube and a transistor, one end of an inductor of each group of conversion branches is connected with a low-voltage positive end, the other end of the inductor is connected with a drain electrode of the IGBT tube, a source electrode of the IGBT tube is connected with a low-voltage negative end and a high-voltage negative end, a gate electrode of the IGBT tube is connected with a control signal, the drain electrode of the IGBT tube is further connected with a short-circuited common intersection point of the source electrode and the gate electrode of the transistor, and the drain electrode of the transistor is connected with the high-voltage positive end at an output.

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