Power Conversion Equipment

Abstract

A power converter is disclosed. The power converter according to one aspect of the present invention includes a housing including an upper part, a lower part arranged parallel to the upper part, a first side part connecting the upper part and the lower part, and a second side part arranged parallel to the first side part; a transistor arranged below the upper part inside the housing; a heat sink arranged below the transistor and providing a passage for moving air flowing in from the outside; a first air blocking part arranged on a side of the heat sink and arranged parallel to the first side part; a plurality of capacitors arranged between the first air blocking part and the second side part; and a transformer arranged apart from the heat sink; the upper part may include an exhaust part formed above the transformer and configured to exhaust air passing through the passage to the outside of the housing.

Description

[Technical field]

[0001] The present invention relates to a power conversion device, and more particularly to a power conversion device having improved heat dissipation efficiency so as to prevent damage caused by heat. [Background technology]

[0002] In general, an uninterruptible power supply (UPS) is a device that provides stable power by preventing power supply abnormalities caused by voltage fluctuations, frequency fluctuations, momentary power outages, and excess voltage when using a general power source or a backup power source. Such uninterruptible power supplies are connected between machines or electronic devices installed in factories and batteries to ensure stable operation of the machines or electronic devices. Recently, the introduction of uninterruptible power supplies has been expanding due to the demand for stable operation of electronic devices used in finance, broadcasting, etc.

[0003] Such an uninterruptible power supply is provided with a power converter that converts direct current (DC) power into power suitable for application to other loads. One of the power converters is a DC-DC converter that converts direct current (DC) power into other direct current (DC) power.

[0004] Such power conversion devices have a problem in that excessive heat is generated in the transformer that converts DC power into other types of power, causing damage to the power conversion device or causing a decrease in its functionality. Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made to solve the above problems, and an object of the present invention is to provide a power conversion device having improved heat dissipation efficiency so as to prevent damage caused by heat.

[0006] Another object of the present invention is to provide a power converter that improves convenience when installing or replacing the power converter.

[0007] The objects of the present invention are not limited to those mentioned above, and other objects not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the following description. [Means for solving the problem]

[0008] According to one aspect of the present invention, the housing may include an upper portion, a lower portion arranged parallel to the upper portion, a first side portion connecting the upper portion and the lower portion, and a second side portion arranged parallel to the first side portion; a transistor arranged inside the housing and below the upper portion; a heat sink arranged below the transistor and providing a passage through which air flowing in from the outside moves; a first air blocking portion arranged on a side of the heat sink and arranged parallel to the first side portion; a plurality of capacitors arranged between the first air blocking portion and the second side portion; and a transformer arranged spaced apart from the heat sink; and the upper portion may be provided with an exhaust portion formed above the transformer and configured to exhaust air that has passed through the passage to the outside of the housing.

[0009] In this case, the power conversion device may further include a second air interruption unit disposed between the plurality of capacitors and the transformer.

[0010] In this case, the first air blocking portion may be disposed between the heat sink and the capacitor.

[0011] In this case, the heat sink may include a heat dissipation plate supporting the transistor; and a plurality of heat dissipation fins extending downward from the plate and spaced apart from one another adjacent to the first side portion.

[0012] In this case, the transistor may be arranged alongside the plurality of heat dissipation fins.

[0013] In this case, the power conversion device may further include a support plate disposed between the lower portion and the heat sink and supporting the heat sink, the support plate including an air guide formed to be inclined to one side of the support plate, and the air guide may guide air flowing in from the outside to be supplied under one side of the heat sink.

[0014] In this case, the power conversion device may further include: a substrate electrically connected to the transistor and the plurality of capacitors; a bus bar having one end electrically connected to the substrate and the other end protruding rearward of the housing; and a coupling portion coupled to the other end of the bus bar and detachably coupled to a connector of an uninterruptible power supply. Effect of the Invention

[0015] With the above-mentioned configuration, in the power conversion device according to the embodiment of the present invention, the air flowing into the heat sink is guided to the upper side of the transformer, so that the heat of the transformer does not flow into the transistor, thereby preventing the transistor from being damaged by heat.

[0016] In addition, the coupling portion is detachably coupled to the connector of the uninterruptible power supply, thereby improving the convenience of installing or replacing the power conversion device. [Brief description of the drawings]

[0017] [Figure 1] 1 is a perspective view showing the inside of an uninterruptible power supply according to an embodiment of the present invention. [Diagram 2] 1 is a perspective view showing an external appearance of a power conversion device according to an embodiment of the present invention; [Diagram 3] FIG. 4 is a perspective view showing the external appearance of the power conversion device according to the embodiment of the present invention, as viewed from another side. [Figure 4] 1 is a side view showing the inside of a power conversion device according to an embodiment of the present invention. [Diagram 5] 1 is a plan view showing the inside of a power conversion device according to an embodiment of the present invention. [Figure 6]1 is an exploded perspective view showing a state in which a heat sink, a transistor, and a substrate of a power converter according to an embodiment of the present invention are separated. [Figure 7] 4 is a diagram illustrating an air flow in a power converter according to an embodiment of the present invention; [Figure 8] 1 is a diagram illustrating a state before a power conversion device according to an embodiment of the present invention is connected to an uninterruptible power supply; [Figure 9] 1 is a diagram showing a state in which a power conversion device according to an embodiment of the present invention is connected to an uninterruptible power supply; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, the embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily carry out the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention, parts not related to the description are omitted in the drawings, and the same reference numerals are used throughout the specification to refer to the same or similar components.

[0019] The words and terms used in this specification and the claims should not be interpreted in a limited manner based on their ordinary or dictionary meanings, but should be interpreted in a meaning and concept that corresponds to the technical idea of ​​the present invention in accordance with the principle that the inventor can define the terms and concepts in order to best describe his / her invention.

[0020] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings correspond to preferred embodiments of the present invention and do not represent the entire technical idea of ​​the present invention, and therefore the relevant configurations may have various equivalents and modifications that replace them at the time of filing of the present invention.

[0021] In this specification, the terms "comprise" or "have" are intended to describe the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but should be understood as not precluding the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0022] A certain component being "in front," "in back," "above," or "below" another component means not only that it is immediately adjacent to the other component and is disposed "in front," "in back," "above," or "below," unless there are special circumstances, but also includes the case where another component is disposed between them. Furthermore, a certain component being "connected" to another component means not only that they are directly connected to each other, but also that they are indirectly connected to each other, unless there are special circumstances.

[0023] Hereinafter, a power conversion device according to an embodiment of the present invention will be described with reference to the drawings.

[0024] FIG. 1 is a perspective view showing the inside of an uninterruptible power supply according to an embodiment of the present invention.

[0025] Referring to FIG. 1, an uninterruptible power supply 10 according to an embodiment of the present invention includes a case 11 and power converters 100 and 200.

[0026] The case 11 includes an accommodating space 11a for accommodating the power converters 100 and 200 and power devices. The case 11 is made of a metal material. However, the case 11 is not limited to being made of a metal material and may be made of various materials such as plastic having rigidity.

[0027] The power converters 100 and 200 include a first power converter 100 and a second power converter 200 .

[0028] The first power converters 100 are arranged side by side from a lower side 11b of the case 11. The first power converters 100 are DC-DC converters that convert direct current (DC) power into other direct current (DC) power. However, the first power converters 100 are not limited to DC-DC converters, and may be AC-DC converters that convert alternating current (AC) power into direct current (DC) power or DC-AC converters that convert direct current (DC) power into alternating current (AC) power. In this case, the first power converters 100 are configured in plurality, and the plurality of first power converters 100 are arranged stacked on top of each other. The first power converters 100 will be described in detail below with reference to the drawings.

[0029] The second power conversion device 200 is disposed in a vertical direction from the lower side surface 11b of the case 11. The second power conversion device 200 is an AC-DC converter that converts AC power into DC power. However, the second power conversion device 200 is not limited to an AC-DC converter, and may be a DC-DC converter that converts DC power into DC power or a DC-AC converter that converts DC power into AC power. In this case, the second power conversion device 200 is configured in a plurality of units, and the plurality of second power conversion devices 100 are disposed next to each other. Accordingly, the plurality of second power conversion devices 200 are prevented from applying a load to each other.

[0030] In addition, a fan 13 for discharging air in the accommodation space 11a of the case 11 to the outside is provided on the upper side surface 11c of the case 11. The fan 13 rotates to draw in air in the accommodation space 11a, and the air in the accommodation space 11a is discharged to the outside through the fan 13. Accordingly, heat generated by the power conversion devices 100, 200 and the power devices is discharged to the outside along with the air flow in the accommodation space 11a, thereby preventing the power conversion devices 100, 200 from being damaged by heat.

[0031] FIG. 2 is an oblique view showing the appearance of a power conversion device according to an embodiment of the present invention, FIG. 3 is an oblique view showing the appearance of a power conversion device according to an embodiment of the present invention from another side, FIG. 4 is a side view showing the interior of a power conversion device according to an embodiment of the present invention, FIG. 5 is a plan view showing the interior of a power conversion device according to an embodiment of the present invention, and FIG. 6 is a separated oblique view showing the heat sink, transistor and substrate of a power conversion device according to an embodiment of the present invention separated.

[0032] 2 to 6, a power converter 100 according to an embodiment of the present invention includes a housing 110, a transistor 120, a heat sink 130, a first air barrier 141, a plurality of capacitors 150, and a transformer 160.

[0033] The housing 110 has a substantially hexahedral shape. The housing 110 is made of a metal material. However, the housing 110 is not limited to being made of a metal material and may be made of various materials having rigidity. The housing 110 includes an upper portion 111, a lower portion 112, a first side portion 113, and a second side portion 114.

[0034] The upper portion 111, the lower portion 112, the first side portion 113 and the second side portion 114 are plate-shaped. The lower portion 112 is arranged next to the upper portion 111. The first side portion 113 connects the upper portion 111 and the lower portion 112. The second side portion 114 is arranged next to the first side portion 113 and connects the upper portion 111 and the lower portion 112. At this time, the housing 110 has a first opening 100a that opens forward in the x-axis direction. Air outside the housing 110 flows into the housing 110 through the first opening 100a. The housing 110 has a second opening 100b that opens backward on the opposite side of the first opening 100a.

[0035] The transistor 120 is disposed below the upper part 111 inside the housing 110 as shown in FIG. 4. The transistor 120 is an insulated gate bipolar transistor (IGBT), which is a semiconductor device capable of high-speed switching of high power. However, the transistor 120 is not limited to an insulated gate bipolar transistor, and may be various switching devices capable of switching power. At this time, since the transistor 120 is a semiconductor device, its switching function may be deteriorated or damaged by heat generated from the transformer 160. Therefore, the transistor 120 is disposed in an area inside the housing 110 where the heat generated from the transformer 160 is not transferred, thereby preventing the transistor 120 from being deteriorated or damaged.

[0036] The heat sink 130 is disposed below the transistor 120 inside the housing 110. The heat sink 130 provides a passage 133 through which air flowing in from the outside of the housing 110 moves, as shown in FIG. 6. The heat sink 130 is made of copper or aluminum. However, the material of the heat sink 130 is not limited to copper or aluminum, and may be made of various materials having thermal conductivity, such as silver. The heat sink 130 receives heat generated from the transistor 120 and exchanges heat with the air to dissipate the heat of the transistor 120. Accordingly, the heat sink 130 prevents the transistor 120 from being damaged by heat.

[0037] The heat sink 130 includes a heat dissipation plate 131 supporting the transistor 120 and a plurality of heat dissipation fins 132 extending downward from the heat dissipation plate 131. The heat dissipation plate 131 contacts the transistor 120 to receive heat generated from the transistor 120. The plurality of heat dissipation fins 132 are arranged side by side with the first side portion 113. At this time, a passage 133 through which air flowing from the outside of the housing 110 moves is formed between the plurality of heat dissipation fins 132. Then, the heat of the heat dissipation plate 131 is transferred to the plurality of heat dissipation fins 132, and then the heat of the plurality of heat dissipation fins 132 is heat exchanged with the air. That is, the heat of the plurality of heat dissipation fins 132 is transferred to the air in the passage 133, and the temperature of the air in the passage 133 increases. The air with increased temperature moves toward the transformer 160 along the passage 133.

[0038] At this time, the transistor 120 is arranged in parallel with the plurality of heat dissipation fins 132. Accordingly, the heat of the transistor 120 is uniformly transferred to each of the plurality of heat dissipation fins 132 through the heat dissipation plate 131, thereby preventing the heat of the heat dissipation plate 131 from concentrating on a portion of the plurality of heat dissipation fins 132 and deteriorating the heat dissipation performance.

[0039] The first air blocking portion 141 is provided on a side of the heat sink 130 and is arranged next to the first side portion 113. The first air blocking portion 141 separates the heat sink 130 from the capacitors 150. As a result, heat generated from the capacitors 150 is prevented from being transferred to the heat sink 130, thereby improving the heat generation performance of the heat sink 130.

[0040] The plurality of capacitors 150 are disposed between the first air blocking portion 141 and the second side portion 114. Air flows into the plurality of capacitors 150 through the first opening 100a of the housing 110. The temperature of the air flowing into the plurality of capacitors 150 increases due to the heat generated by the plurality of capacitors 150. At this time, the air whose temperature has increased due to the plurality of capacitors 150 is prevented from moving to the heat sink 130 by the first air blocking portion 141.

[0041] The transformer 160 is disposed apart from the heat sink 130. The transformer 160 generates heat by converting power. At this time, the air in the heat sink 130 is moved to the transformer 160. The air in the transformer 160 is moved in an upward direction, which is a Z-axis direction, after exchanging heat with the transformer 160. The upper part 111 is formed with an outlet part 111a having a hole shape, and the air in the transformer 160 is discharged to the outside of the housing 110 through the outlet part 111a. That is, the air whose temperature has been increased by the transformer 160 is moved in an upward direction, so that the air in the transformer 160 does not re-enter the heat sink 130, and the heat generated from the transformer 160 is not transferred to the transistor 120. As such, the transistor 120 is not transferred with the heat generated from the transformer 160, and thus the performance of the power conversion device 100 is prevented from being degraded.

[0042] In addition, the power conversion apparatus 100 according to the embodiment of the present invention further includes a second air blocking unit 142 disposed between the plurality of capacitors 150 and the transformer 160 .

[0043] The second air blocking part 142 not only prevents the air in the transformer 160 from moving to the capacitors 150, but also prevents the heat of the transformer 160 from moving to the capacitors 150 by radiation. Accordingly, the second air blocking part 142 blocks the flow of heat between the transformer 160 and the capacitors 150, thereby preventing the performance of the capacitors 150 from being deteriorated due to the heat of the transformer 160.

[0044] In addition, the power conversion device 100 according to the embodiment of the present invention further includes a substrate 171 , a bus bar 172 and a coupling portion 173 .

[0045] The substrate 171 is electrically connected to the transistor 120 and the plurality of capacitors 150. The bus bar 172 is electrically connected to the substrate 171 and the power equipment of the uninterruptible power supply (10, see FIG. 1). One end of the bus bar 172 is electrically connected to the substrate 171, and the other end of the bus bar 172 protrudes rearward of the housing 110 through the second opening 100b. The coupling portion 173 is coupled to the other end of the bus bar 172. The coupling portion 173 is detachably coupled to a connector that is electrically connected to the power equipment of the uninterruptible power supply (10, see FIG. 1). In this manner, the transistor 120 and the plurality of capacitors 150 are electrically connected to the power equipment of the uninterruptible power supply (10, see FIG. 1) through the substrate 171, the bus bar 172, and the coupling portion 173.

[0046] FIG. 7 is a diagram illustrating an air flow in a power converter according to an embodiment of the present invention.

[0047] Referring to FIG. 7, the air flow inside the housing 110 of the power converter 100 according to the embodiment of the present invention will be examined in detail.

[0048] First, the air outside the housing 110 flows into the heat sink 130 through the first opening 100a. Then, the heat of the transistor 120 is transferred to the heat sink 130, and the heat of the heat sink 130 is exchanged with the air. Then, the air that has flowed into the heat sink 130 flows in a first direction ( TIFF2024545763000002.tif78).

[0049] At this time, the power converter 100 according to the embodiment of the present invention further includes a support plate 115 disposed between the lower part 112 and the heat sink 130 .

[0050] The support plate 115 supports the heat sink 130. The support plate 115 includes an air guide 115a formed to be inclined toward one side of the support plate 115. The air guide 115a guides the air flowing out of the housing 110 to be supplied under one side of the heat sink 130. Accordingly, even if an air vortex occurs on one side of the heat sink 130, the air is guided to be supplied under the heat sink 130 by the air guide 115a, so that the air can be smoothly supplied to the heat sink 130.

[0051] The air transferred to the transformer 160 receives the heat generated by the transformer 160. That is, the temperature of the air transferred to the transformer 160 is increased by the transformer 160 and flows upward in the second direction ( TIFF2024545763000003.tif78). Accordingly, the second direction ( The air moved in the heat sink 130 in the first direction ( TIFF2024545763000005.tif78). That is, the driving force is provided to move in such a second direction ( Since the air moved to the heat sink 130 is not moved to the heat sink 130, the heat of the transformer 160 is not transferred to the transistor 120, and the performance of the power conversion device 100 is prevented from being degraded.

[0052] In addition, inside the housing 110, air flows in the first direction ( TIFF2024545763000007.tif78), the first region A where the transistor 120 and the heat sink 130 are disposed and the air are moved in the second direction ( TIFF2024545763000008.tif78) is divided into a second region B in which the transformer 160 is disposed. The first region A and the second region B are not separated by a separate structure, and the first direction ( TIFF2024545763000009.tif78) and the second direction ( By disposing the transistor 120, the heat sink 130 and the transformer 160 in the first region A and the second region B, respectively, in order to prevent the heat of the transformer 160 from being transferred to the transistor 120 by the air flow moving through the transformer 160 (TIFF2024545763000010.tif78), and to control one air flow without separately installing an exhaust passage for discharging the heat of the transistor 120 and an exhaust passage for discharging the heat of the transformer 160, the size of the power conversion device 100 is prevented from increasing due to a separate heat dissipation structure, and the heat generation efficiency of the power conversion device 100 is ensured.

[0053] FIG. 8 is a diagram showing a state in which a power conversion device according to an embodiment of the present invention is not connected to an uninterruptible power supply, and FIG. 9 is a diagram showing a state in which a power conversion device according to an embodiment of the present invention is connected to an uninterruptible power supply.

[0054] A method of connecting the power conversion device 100 according to an embodiment of the present invention to the uninterruptible power supply 10 will be considered in detail with reference to FIGS. 1, 8 and 9. FIG.

[0055] The power converter 100 is inserted into the case 11. At this time, the uninterruptible power supply 10 is provided with a connecting part 14 connected to a power device of the power converter 100. The connecting part 14 is arranged vertically along the inner surface of the case 11. The connecting part 14 includes a connector 15 protruding toward the front of the case 11. The coupling part 173 is detachably coupled to the connector 15. Specifically, the coupling part 173 is formed so that the connector 15 is inserted into the coupling part 173. That is, the connector 15 is inserted into and coupled to the coupling part 173. Accordingly, the power converter 100 is electrically connected to the uninterruptible power supply 10. On the contrary, when the power converter 100 is separated from the case 11, the connector 15 is detached from the coupling part 173 and separated.

[0056] As such, in the power conversion device 100 according to an embodiment of the present invention, since the coupling portion 173 is detachably coupled to the connector 15, a process for coupling to the power conversion device 100 with a separate bus bar is not required, thereby improving the convenience of assembling the power conversion device 100 or disassembling it for maintenance.

[0057] Although an embodiment of the present invention has been described, the concept of the present invention is not limited to the embodiment presented in this specification, and a person skilled in the art who understands the concept of the present invention may easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same concept, which may also be considered to fall within the scope of the concept of the present invention. [Explanation of symbols]

[0058] 100: Power conversion device 110: Housing 111: Upper part 112: Lower part 113:First side part 114:Second side part 120: Transistor 130: Heat sink 141: First air cutoff section 150: Multiple Capacitors 160: Transformer

Claims

1. a housing including an upper portion, a lower portion arranged side by side with the upper portion, a first side portion connecting the upper portion and the lower portion, and a second side portion arranged side by side with the first side portion; a transistor disposed within said housing below said upper portion; a heat sink provided under the transistor and providing a passage for moving air flowing in from the outside; a first air blocking portion provided on a side surface of the heat sink and arranged alongside the first side surface portion; A plurality of capacitors disposed between the first air blocking portion and the second side portion; and a transformer disposed remotely from the heat sink; The upper portion is provided with an exhaust portion formed above the transformer and configured to allow air that has passed through the passage to be exhausted to the outside of the housing.

2. The power converter of claim 1 , further comprising: a second air break disposed between the plurality of capacitors and the transformer.

3. The power conversion device according to claim 1 , wherein the first air blocking portion is disposed between the heat sink and the capacitor.

4. The heat sink is a heat sink plate supporting the transistor; and The power converter according to claim 1 , further comprising a plurality of heat dissipation fins extending downward from the plate and spaced apart from one another alongside the first side portion.

5. The power converter of claim 4 , wherein the transistor is disposed alongside the plurality of heat sink fins.

6. a support plate disposed between the lower portion and the heat sink and supporting the heat sink; The support plate includes an air guide formed to be inclined toward one side of the support plate, The power converter of claim 4 , wherein the air guide guides the air flowing in from the outside to be supplied under one side of the heat sink.

7. a substrate electrically coupled to the transistor and the plurality of capacitors; A bus bar having one end electrically connected to the board and the other end protruding rearwardly from the housing; and The power conversion device according to claim 1 , further comprising a coupling portion coupled to the other end of the bus bar and configured to be detachably coupled to a connector of an uninterruptible power supply.

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