GB2534013A - Power converter and rolling stock including the same - Google Patents
Power converter and rolling stock including the same Download PDFInfo
- Publication number
- GB2534013A GB2534013A GB1519836.9A GB201519836A GB2534013A GB 2534013 A GB2534013 A GB 2534013A GB 201519836 A GB201519836 A GB 201519836A GB 2534013 A GB2534013 A GB 2534013A
- Authority
- GB
- United Kingdom
- Prior art keywords
- power converter
- noise
- dust
- proof filter
- rolling stock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 65
- 239000012212 insulator Substances 0.000 claims abstract description 66
- 238000001816 cooling Methods 0.000 claims abstract description 55
- 239000000428 dust Substances 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 239000004065 semiconductor Substances 0.000 claims abstract description 6
- 230000003247 decreasing effect Effects 0.000 description 14
- 238000009423 ventilation Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D49/00—Other details
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Automation & Control Theory (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Inverter Devices (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
A power converter 100 for a rolling stock 200 comprising a blower 120 which draws in cooling air from an air intake port on a side which abuts a side surface of the rolling stock 200, a dust proof filter 130 at the air intake port and a noise insulator 140 with an opening and a noise insulating portion (143 fig 3) located between blower 120 and filter 130. The power converter 100 cools a semiconductor device constituting a power conversion circuit by using the cooling air. A noise insulating portion (143 fig 3) may be at a portion overlapping a suction port 121 of blower 120. Filter 130 or noise insulator 140 may be formed in a protruding shape. Blower 120 may include a suction mechanism that sucks air by rotating impellers. The air intake port may be disposed in an underfloor area of the rolling stock 200. A plate shaped cowl (300 fig 8) may be disposed on a side surface of power converter 100 via a space (310 fig 8) where cooling air flows. An outlet port (190 fig 9) of power converter 100 may be on a bottom surface side of the rolling stock 200.
Description
TITLE OF THE INVENTION
POWER CONVERTER AND ROLLING STOCK INCLUDING THE SAME
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a noise insulation structure of a power converter.
2. Description of the Related Art
An underfloor area of the rolling stock is provided with a power converter, such as a vehicle drive control device to control power to be supplied to a drive electric motor, and an auxiliary power unit to control power to be supplied to an in-vehicle electrical system like an air-conditioner. Such power converters are provided with heat generation components such as a semiconductor device to perform AC/DC conversion by switching current and a reactor to smooth current. Therefore, a blower to supply cooling air to these components is mounted. Since the blower generates noise louder than peripheral apparatuses, the noise leaking outside the converter is needed to be reduced within a range of not impairing cooling performance. There is a known technology disclosed in JP-2008-149885-A as a structure to reduce the noise that leaks outside the converter from the blower.
A rolling stock control device disclosed in JP-2008-149885-A is provided in an underfloor area of the rolling stock, and a power conversion circuit and an electric blower to cool circuit components are stored inside a casing. An air intake port of the electric blower is provided on a bottom surface of the casing higher than a surrounding bottom surface of the casing. The noise is prevented from directly reaching a side surface of the rolling stock by providing the air intake port on the bottom surface and providing an outer wall on the side which abut on side surface of the rolling stock. Further, in the case where the rolling stock travels at a high speed, a laminar flow of the air generated on a surface of the casing is separated, thereby reducing a pressure difference between the inside and the outside the casing at the air intake port and further preventing reduction of an intake air amount by the electric blower.
SUMMARY OF THE INVENTION
In the case where an air intake port of a blower is disposed on a bottom surface of a casing like a rolling stock control device disclosed in 12-2008-149885-A, there may be concern that a dust-proof filter disposed in the vicinity of the air intake port of the blower is damaged or clogged by scattered ballast around a railroad, and an air flow amount to be supplied to the blower is reduced. On the other hand, in the case where the air intake port is disposed in a place other than the bottom floor, such as a side which abut on side surface of the rolling stock, the above-described problem of damaging or clogging the dust-proof filter due to the scattered ballast can be solved. However, there may be a problem that noise leaking from the blower along the railroad track is increased.
The present invention is achieved to solve the above problems and directed to providing a power converter having a structure in which a level of the noise that leaks along the railroad track is lowered while preventing reduction of a cooling air amount caused by damaging or clogging the dust-proof filter.
A power converter according to a first invention to solve the above-described problems includes: a blower that draws in cooling air from an air intake port provided on a side which abut on side surface of a rolling stock of the power converter for the rolling stock; and a dust-proof filter that is disposed at the air intake port and prevents dust from entering the blower. The power converter cools a semiconductor device constituting a power conversion circuit by using the cooling air drawn in from the air intake port. Further, a noise insulator partly including an opening is disposed between the blower and the dust-proof filter.
According to the power converter in a second invention, the noise insulator includes the opening and a noise insulating portion, and in the case of viewing the power converter from a direction orthogonal to a surface of the air intake port, the noise insulating portion is disposed at a portion overlapping a suction port of the blower.
According to the power converter in a third invention, an edge portion of the noise insulator is interposed and fixed between an outer wall of a blower chamber and the dust-proof filter, and the noise insulator is formed in a protruding shape such that the noise insulating portion is more recessed inside the power converter than the edge portion, and a space where cooling air flows is formed between the noise insulating portion and the dust-proof filter.
According to the power converter in a fourth invention, an edge portion of the noise insulator is interposed and fixed between an outer wall of the power converter and the dust-proof filter, and the dust-proof filter is formed in a protruding shape so as to protrude more outward from the power converter than a fixing portion fixed to the outer wall of the power converter, and a space where cooling air flows is formed between the noise insulating portion and the dust-proof filter.
According to the power converter in a fifth invention, an edge portion of the dust-proof filter is interposed and fixed between the outer wall of the power converter and the noise insulator, and the dust-proof filter is formed in a protruding shape so as to be more recessed inside the power converter than the edge portion, and a space where cooling air flows is formed between the noise insulating portion and the dust-proof filter.
According to the power converter in a sixth invention, an edge portion of the dust-proof filter is interposed and fixed between the outer wall of the power converter and the noise insulator, and the noise insulator is formed in a protruding shape so as to protrude more outward from the power converter than a fixing portion fixed to the outer wall of the power converter, and a space where cooling air flows is formed between the noise insulating portion and the dust-proof filter.
According to the power converter in a seventh invention, the blower includes, at the suction port, a suction mechanism that suctions air by rotating impellers.
According to a rolling stock in an eighth invention, the power converter according to any one of the above-described first to seventh inventions is provided in an underfloor area, and the power converter is disposed in the underfloor area of the rolling stock such that an air intake port is oriented to a side which abut on side surface side of the rolling stock.
A noise level of the noise generated from the blower and leaking to the side which abuts on side surface of the rolling stock can be lowered.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view illustrating a power converter according to a first embodiment of the present invention; Fig. 2 is a perspective view illustrating a dust-proof filter disposed in the power converter according to the first embodiment; Fig. 3 is a perspective view illustrating a noise insulator disposed in the power converter according to the first embodiment; Fig. 4 is a view of Fig. 1 when viewed from a side which abut on side surface of a rolling stock, illustrating a state in which the noise insulator and the dust-proof filter are disposed in the power converter according to the first embodiment; Fig. 5 is a cross-sectional view of Fig. 1 when viewed from an upper surface, illustrating a ventilation structure of the power converter according to the first embodiment; Fig. 6 is a cross-sectional view of Fig. 1 when viewed from a travel direction of the rolling stock, illustrating the ventilation structure of the power converter according to the first embodiment; Fig. 7 is a perspective view illustrating a state in which the power converter according to the first embodiment is disposed in an underfloor area of the rolling stock; Fig. 8 is a perspective view illustrating a state in which a power converter according to a second embodiment is disposed in an underfloor area of a rolling stock; Fig. 9 is a cross-sectional view of Fig. 1 when viewed from a travel direction of a rolling stock, illustrating a ventilation structure of a power converter according to a third embodiment; Fig. 10 is a cross-sectional view of a power converter according to a fourth embodiment when viewed from an upper surface; Fig. 11 is a cross-sectional view of a power converter according to a fifth embodiment when viewed from an upper surface; and Fig. 12 is a cross-sectional view of a power converter according to a sixth embodiment when viewed from an upper surface.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.
First embodiment Fig. 1 is a perspective view illustrating a power converter according to a first embodiment of the present invention. A power converter 100 is provided with two blower chambers 110, and a blower 120 to supply cooling air to an electronic device mounted inside the power converter 100 is installed in each of the air blower chambers. A dust-proof filter 130 to prevent dust from entering the blower 120 and a noise insulator 140 to prevent leakage of noise generated from the blower 120 to the outside are disposed at an air intake port provided at a side which abut on side surface of the blower chamber 110. The cooling air is supplied to the blower chamber 110 via the dust-proof filter 130. The noise insulator 140 is interposed and fixed between the dust-proof filter 130 and a converter outer wall 150. Thus, an end portion of the noise insulator is interposed between the converter outer wall 150 and the dust-proof filter 130, thereby preventing man-hour to fix the noise insulator from being increased and further achieving to easily fix the noise insulator.
Fig. 2 is a perspective view illustrating the dust-proof filter disposed in the power converter according to the first embodiment. The dust-proof filter 130 includes a metallic frame 131 and a mesh 132 having air permeability, and performs cooling air introduction and dust proof by the mesh 132. A plurality of circular holes for dust-proof filter fixation 133 is provided at an edge portion of the frame 131.
Fig. 3 is a perspective view illustrating a noise insulator disposed in the power converter according to the first embodiment. An edge portion 141 of the noise insulator 140 includes a plurality of circular holes for noise insulator fixation 142 at positions corresponding to the circular holes for dust-proof filter fixation 133. Further, a portion other than the edge portion 141 is bent so as to form a protruding shape so as to be recessed in a direction of the blower 120 from the dust-proof filter 130 side (hereinafter, this recessed portion will be referred to as a noise insulating portion 143). The edge portion 141 and the noise insulating portion 143 are provided with a plurality of openings 144 for ventilation at positions corresponding to the mesh 132 of the dust-proof filter 130. Thus, since the noise insulating portion 143 is formed in the protruding shape that is recessed more inside the blower chamber than the edge portion 141, a space where cooling air 122 flows can be secured between the mesh 132 of the dust-proof filter 130 and the noise insulating portion 143. Further, a level of noise leaking to a side which abuts on side surface of a rolling stock can be decreased without reducing an air flow amount of the blower. Here, the noise insulating portion 143 can be formed of a metallic plate or the like, but as long as the material can insulate noise, the noise insulating portion 143 may also be formed of a material other than metal.
Fig. 4 is a view of the power converter 100 illustrated in Fig. 1 when viewed from the side which abut on side surface of the rolling stock, illustrating a state in which the noise insulator and the dust-proof filter are disposed in the power converter according to the first embodiment. In Fig. 4, among the two blower chambers 110 disposed on right and left sides, the left side indicates a state in which the dust-proof filter 130 and the noise insulator 140 are fixed, and the right side indicates a state in which the dust-proof filter 130 and the noise insulator 140 are removed. A suction mechanism to suction air by rotating impellers is provided at a suction port 121 disposed at each one of both side surfaces of the blower 120. Due to this, wind noise is generated at the suction port 121 when the impellers are rotated. Therefore, the suction port 121 is a main noise source of the power
II
converter 100. The dust-proof filter 130 and the noise insulator 140 are fixed at screw holes 151 provided on the converter outer wall 150 in a state that bolts are inserted into the respective circular holes for fixation 133, 142. At this point, the openings 144 provided at the noise insulator 140 are disposed at positions other than a project plane of the suction port 121 when viewed from the side which abut on side surface of the rolling stock. More specifically, in the case of viewing the power converter from a direction orthogonal to a surface of the air intake port (side surface of the rolling stock), the noise insulating portion 143 is disposed at a portion overlapping the suction port 121 that is the main noise source, and the noise insulating portion cannot be directly viewed. In other words, in the case of viewing the power converter from the side which abuts on side surface of the rolling stock, the suction port of the blower is disposed at a portion not having any opening, and the suction port is hidden behind the noise insulator. With this structure, the level of noise leaking to the side which abut on side surface of the rolling stock can be decreased because the noise does not directly reach the side which abut on side surface of the rolling stock from the suction port.
The present embodiment exemplifies the case where the suction ports 121 are disposed on both right and left side surfaces of the blower 120, and the noise insulating portions 143 are disposed on both sides of the air intake ports in a manner overlapping the suction ports 121. However, in the case of applying the blower 120 that includes one suction port 121 at a center, the same effect as the present embodiment can also be obtained by disposing the noise insulating portion 143 at the center of the air intake port in such a manner that the noise insulating portion 143 overlaps the suction port 121. Further, the present embodiment exemplifies the case where the suction ports 121 disposed on the right and left side surfaces of the blower 120 are respectively oriented to the both right and left side surfaces of the blower 120. However, the oriented direction of the suction port 121 is not limited thereto and may be oriented in the direction of the air intake port of the power converter.
Fig. 5 is a cross-sectional view of the blower chamber when viewed from an upper surface, and Fig. 6 is a cross-sectional view of the power converter when viewed from a travel direction of the rolling stock. The drawings respectively illustrate a ventilation structure of the power converter according to the first embodiment. The cooling air 122 indicated by dotted lines in the drawings are substantially uniformly introduced from an entire surface of the mesh 132 of the dust-proof filter 130. The cooling air 122 having passed through the mesh 132 passes through the space between the dust-proof filter 130 and the noise insulator 140, and passes through the openings 144 provided at the noise insulator 140, and then is supplied to the suction port 121 of the blower 120.
On the other hand, a discharge port 123 of the blower 120 is connected to a ventilation duct 160. The ventilation duct 160 is provided with a cooling fin 170 in order to cool a semiconductor device 171 constituting a power conversion circuit of the power converter, and when the cooling air 122 flows through the cooling fins 170, heat generated at the semiconductor device 171 is received from the cooling fin 170. The cooling air 122 having received the heat from the cooling fin 170 is emitted to the outside of the power converter 100 from an outlet port 190 disposed on an opposite side of the blower chamber 110.
Fig. 7 is a perspective view illustrating a state in which the power converter according to the first embodiment is disposed in an underfloor area of the rolling stock. In an actual rolling stock, a plurality of devices is mounted in the underfloor area, but Fig. 7 illustrates the view extracting only a portion where the power converter 100 is mounted. The power converter 100 is disposed in the underfloor area of a rolling stock 200 and has a structure in which the dust-proof filter 130 and the noise insulator disposed at an opened portion of the blower chamber 110 are oriented in the side surface direction of the rolling stock. The cooling air is supplied into the power converter 100 from the side surface direction of the rolling stock.
Next, effects of the first embodiment of the present invention will be described. The suction port 121 of the blower 120 generating wind noise is hidden by the noise insulating portion 143 of the noise insulator 140 when viewed from the air intake port of the power converter. With this structure, the level of noise leaking to the side which abut on side surface of the rolling stock can be decreased because the noise does not directly reach the side surface side of the rolling stock. Here, a structure in which the openings 144 of the noise insulator 140 are formed of a mesh by omitting the dust-proof filter 130 may also be considered, but the noise insulating portion is required to be formed large enough to hide the suction port 121 of the blower in order to reduce the noise. Therefore, there is a problem in which the openings 144 may become relatively a small area and ventilation resistance by the mesh may be increased. In other words, by disposing the noise insulator 140 inside the dust-proof filter 130 like the present embodiment, dust can be prevented from entering the inside of the blower chamber and further the cooling air amount can be secured while sufficiently decreasing the noise level.
Further, a fixing bolt can be shared by providing the circular hole for noise insulator fixation 142 and the circular hole for dust-proof filter fixation 133 at the corresponding position. Therefore, the noise insulator 140 and the dust-proof filter 130 can be easily fixed by fastening the fixing bolt into the screw hole 151 provided on the converter outer wall 150 while interposing the noise insulator 140 between the converter outer wall 150 and the dust-proof filter 130 in a state that the fixing bolt is inserted into the circular holes.
Moreover, the space where the cooling air 122 flows can be formed between the dust-proof filter 130 and the noise insulator 140 by bending the noise insulating portion 143 such that the portion excluding the edge portion 141 of the noise insulator 140 is recessed in the direction of the blower 120 from the dust-proof filter 130. Further, a sufficient ventilation area can be secured by providing the openings 144 at the noise insulator 140. Therefore, the level of noise leaking to the side which abuts on side surface of the rolling stock can be decreased without reducing the cooling air amount.
Furthermore, when the power converter 100 is disposed in the underfloor area of the rolling stock 200, the structure of introducing the cooling air 122 from the side which abuts on side surface of the rolling stock is formed, thereby preventing the dust-proof filter 130 from damage or clogging caused by scattered ballast around a railroad. Therefore, the level of noise leaking to the side which abuts on side surface of the rolling stock can be decreased without reducing the cooling air amount.
Meanwhile, according to the present embodiment, the dust-proof filter 130 and the noise insulator 140 are fixed to the power converter 100 as separate members, but the dust-proof filter 130 and the noise insulator 140 may be integrally formed as one member. Further, in the present embodiment, the case of providing the blower 120 including the two suction ports 121 has been described, but the same effect can be obtained even in the case of providing the blower 120 including one suction port 121. Moreover, noise resonance inside the blower chamber 110 is prevented and the level of noise leaking to the side which abuts on side surface of the rolling stock can be further decreased by applying a noise absorbing material such as a urethane sponge and glass wool on an inner wall of the blower chamber 110.
Second embodiment Fig. 8 is a perspective view illustrating a state in which a power converter according to a second embodiment is disposed in an underfloor area of a rolling stock. In the second embodiment, a plate-shaped cowl 300 is disposed on a side which abut on side surface of an underfloor area of a rolling stock 200, and a power converter 100 described in a first embodiment is mounted inside the cowl 300. A space 310 of about several millimeters is formed between the cowl 300 and the rolling stock 200, and further a space is formed between the cowl 300 and a side surface of the power converter 100. Cooling air 122 is introduced from these spaces. By thus forming a structure in which the cowl 300 is disposed via the space at the side surface of the power converter 100, a level of noise leaking to the side which abuts on side surface of the rolling stock can be further decreased by a noise insulating effect of the cowl 300. Further, since a cross-sectional area of the space 310 between the cowl 300 and the rolling stock 200 is sufficiently large, there is little ventilation resistance when the cooling air 122 passes through the space 310. Therefore, the level of noise leaking to the side which abut on side surface of the rolling stock can be decreased without reducing the cooling air amount.
Third Embodiment Fig. 9 is a cross-sectional view of a power converter when viewed from a travel direction of a rolling stock, illustrating a ventilation structure of the power converter according to a third embodiment. In the third embodiment, a reactor 180 for smoothing current is provided at a ventilation duct 160 in addition to a cooling fin 170, and cooling air 122 is supplied to these components. The cooling air 122 having received heat from the cooling fin 170 and the reactor 180 is emitted to the outside from an outlet port 190 disposed on a bottom surface of the power converter 100. By thus providing the outlet port 190 on the bottom surface of the power converter 100, a level of noise leaking to an opposite side of a blower chamber 110 can be decreased. Meanwhile, since a ventilation area at a portion where the reactor 180 is disposed is large, ventilation resistance at the time of turning a flow of the cooling air 122 downward from a horizontal direction is negligibly small. Therefore, the level of noise leaking to the side which abuts on side surface of the rolling stock can be decreased without reducing the cooling air amount.
Fourth Embodiment Fig. 10 is a cross-sectional view of a blower chamber 110 of a power converter 100 according to a fourth embodiment when viewed from an upper surface. In a first embodiment, a description has been given for a structure in which a dust-proof filter 130 is formed of a flat plate and a noise insulating portion 143 is formed by bending a portion excluding an edge portion 141 of a noise insulator 140 such that the portion is recessed in a direction of a blower 120 from a dust-proof filter 130. However, in the fourth embodiment, a space where cooling air 122 flows is formed between a mesh 132 and the noise insulating portion 143 by forming a structure in which the noise insulator 140 is formed of a flat plate and the dust-proof filter 130 is bent to have a protruding shape that protrudes outward from the blower chamber 110 as illustrated in Fig. 10. Note that other portions except for the above-mentioned structure are same as the first embodiment.
According to the present embodiment also, a level of noise leaking to the side which abut on side surface of the rolling stock can be decreased without reducing a cooling air amount because a suction port of the blower is disposed on a project plane of the noise insulating portion when the power converter is viewed from a side which abut on side surface of a rolling stock. However, since this is the structure in which the dust-proof filter protrudes outward from the blower chamber 110, the structure is applicable when there is spatial allowance at the side surface of the power converter.
Fifth Embodiment Fig. 11 is a cross-sectional view of a blower chamber 110 of a power converter 100 according to a fifth embodiment when viewed from an upper surface. In a first embodiment, a description has been given for a structure in which a noise insulator 140 is Interposed between a dust-proof filter 130 and a converter outer wall 150. However, in the fifth embodiment, the noise Insulator 140 is disposed outside the dust-proof filter 130 and the noise insulator 140 is formed of a flat plate as illustrated in Fig. 11, and a portion excluding an edge portion of the dust-proof filter 130 is formed in a protruding shape so as to be recessed in a direction of a blower 120 from the noise insulator 140. Note that other portions except for the above-mentioned structure are same as the first embodiment. In the structure illustrated in the present embodiment, cooling air 122 having passed through an opening 144 at a center portion of the noise insulator 140 on the outer side passes through a space formed between the noise insulator 140 and the dust-proof filter 130, and passes through a mesh, and then is drawn in into a blower chamber 110.
Here, according to the structure illustrated in the present embodiment, there may be a possibility that some dust hindering a flow of the cooling air enters the space between the noise insulator 140 and the dust-proof filter 130 and reduces a cooling air amount. Therefore, it is preferable to have a structure in which a bottom surface member 145 is removed from the noise insulator 140 illustrated in Fig. 2. By removing the bottom surface member 145, the dust having entered the space between the noise insulator 140 and the dust-proof filter 130 easily falls off, and the cooling air amount can be prevented from being reduced. According to the present embodiment also, a level of noise leaking to the side which abut on side surface of the rolling stock can be decreased without reducing a cooling air amount because a suction port of the blower is disposed on a project plane of a noise insulating portion when the power converter is viewed from a side which abut on side surface of a rolling stock. However, since this is the structure in which the dust-proof filter is disposed outside the dust-proof filter, it is preferable to secure a relatively large space between the dust-proof filter and the noise insulator such that no dust is stuck between the dust-proof filter and the noise insulator.
Sixth Embodiment Fig. 12 is a cross-sectional view of a blower chamber 110 of a power converter 100 according to a sixth embodiment when viewed from an upper surface. In a fifth embodiment, a description has been given for an exemplary structure in which a noise insulator 140 is disposed outside a dust-proof filter 130, the noise insulator 140 is formed of a flat plate, and a portion excluding an edge portion of the dust-proof filter 130 is recessed in a direction of a blower 120 from the noise insulator 140 as illustrated in Fig. 11. However, in the sixth embodiment, provided is a structure in which the noise insulator 140 is disposed outside the dust-proof filter 130 and the dust-proof filter 130 is formed of a flat plate, and further a space where cooling air 122 flows is formed between a mesh 132 and a noise Insulating portion 143 by bending the noise insulator 140 so as to protrude outward from a blower chamber 110.
According to the present embodiment also, a level of noise leaking to the side which abut on side surface of a rolling stock can be decreased without reducing a cooling air amount because a suction port of the blower is disposed on a project plane of the noise insulating portion when the power converter is viewed from a side which abut on side surface of a rolling stock. However, since this is the structure in which the noise Insulator is formed protruding outward from the blower chamber 110, the structure is applicable when there is spatial allowance at the side surface of the power converter.
Claims (11)
- Claims: 1. A power converter for a rolling stock, comprising: a blower configured to draw in cooling air from an air intake port provided on a side of the power converter, which side is for location at a side surface of the rolling stock; and a dust-proof filter disposed at the air intake port and configured to prevent dust from entering the blower, the power converter being configured to cool a semiconductor device constituting a power conversion circuit by using the cooling air drawn in from an air intake port, wherein a noise insulator including an opening and a noise insulating portion is disposed between the blower and the dust-proof filter.
- 2. The power converter according to claim 1, wherein in the case of viewing the power converter from a side of the air intake port, the noise insulating portion is disposed at a portion overlapping a suction port of the blower.
- 3. The power converter according to claim 1 or claim 2, wherein an edge portion of the noise insulator is interposed and fixed between an outer wall of a blower chamber and the dust-proof filter, and the noise insulator is formed in a protruding shape such that the noise insulating portion is more recessed inside the power converter than the edge portion, and a space where cooling air flows is formed between the noise insulating portion and the dust-proof filter.
- 4. The power converter according to claim 1 or claim 2, wherein an edge portion of the noise insulator is interposed and fixed between an outer wall of the power converter and the dust-proof filter, and the dust-proof filter is formed in a protruding shape so as to protrude more outward from the power converter than a fixing portion fixed to an outer wall of the power converter, and a space where cooling air flows is formed between the noise insulating portion and the dust-proof filter.
- 5. The power converter according to claim 1 or claim 2, wherein an edge portion of the dust-proof filter is interposed and fixed between an outer wall of the power converter and the noise insulator, and the dust-proof filter is formed in a protruding shape so as to be more recessed inside the power converter than the edge portion, and a space where cooling air flows is formed between the noise insulating portion and the dust-proof filter.
- 6. The power converter according to claim 1 or claim 2, wherein an edge portion of the dust-proof filter is interposed and fixed between the outer wall of the power converter and the noise insulator, and the noise insulator is formed in a protruding shape so as to protrude more outward from the power converter than a fixing portion fixed to an outer wall of the power converter, and a space where cooling air flows is formed between the noise insulating portion and the dust-proof filter.
- 7. The power converter according to any one of claim 1 to claim 6, wherein the blower includes, at the suction port, a suction mechanism that sucks air by rotating impellers.
- 8. The power converter according to any one of claim 1 to claim 7, wherein the air intake port is disposed in an underfloor area of the rolling stock.
- 9. The power converter according to claim 8, wherein a plate-shaped cowl is disposed on a side surface of the power converter via a space where cooling air flows.
- 10. The power converter according to claim 8 or claim 9, wherein an outlet port of the power converter is disposed on a bottom surface side of a rolling stock.
- 11. A rolling stock mounted with a power converter according to any one of claim 1 to claim 10 disposed in an underfloor area, wherein the power converter is disposed at the underfloor area of the rolling stock such that the air intake port is oriented to a side surface of the rolling stock.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014261536A JP6385816B2 (en) | 2014-12-25 | 2014-12-25 | Power converter and railway vehicle equipped with the same |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201519836D0 GB201519836D0 (en) | 2015-12-23 |
| GB2534013A true GB2534013A (en) | 2016-07-13 |
| GB2534013B GB2534013B (en) | 2016-12-28 |
Family
ID=55132580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1519836.9A Active GB2534013B (en) | 2014-12-25 | 2015-11-10 | Power converter and rolling stock including the same |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6385816B2 (en) |
| CN (1) | CN105730461B (en) |
| DE (1) | DE102015226389B4 (en) |
| GB (1) | GB2534013B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020126548A1 (en) * | 2018-12-18 | 2020-06-25 | Bombardier Transportation Gmbh | An arrangement for cooling power semiconductor devices of a converter |
| WO2020126547A1 (en) * | 2018-12-18 | 2020-06-25 | Bombardier Transportation Gmbhbombardier Transportation Gmbh | An arrangement for cooling power semiconductor devices of a converter |
| SE2151206A1 (en) * | 2021-10-01 | 2023-02-28 | Bombardier Transp Gmbh | Converter system with improved cooling of magnetic components and a railway vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP7654385B2 (en) * | 2020-11-18 | 2025-04-01 | ナブテスコ株式会社 | Air compressor and air suction device |
| CN113098237B (en) * | 2021-05-12 | 2022-05-31 | 郑州铁路职业技术学院 | A power conversion device and an electric railway vehicle equipped with the power conversion device |
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| JP4375218B2 (en) * | 2004-11-25 | 2009-12-02 | 株式会社明電舎 | Power converter cooling and soundproof structure |
| JP4510926B2 (en) * | 2008-11-05 | 2010-07-28 | 三菱電機株式会社 | Forced air-cooled vehicle control system |
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- 2015-11-18 CN CN201510795361.4A patent/CN105730461B/en active Active
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020126548A1 (en) * | 2018-12-18 | 2020-06-25 | Bombardier Transportation Gmbh | An arrangement for cooling power semiconductor devices of a converter |
| WO2020126547A1 (en) * | 2018-12-18 | 2020-06-25 | Bombardier Transportation Gmbhbombardier Transportation Gmbh | An arrangement for cooling power semiconductor devices of a converter |
| US11937412B2 (en) | 2018-12-18 | 2024-03-19 | Bombardier Transportation Gmbh | Arrangement for cooling power semiconductor devices of a converter |
| SE2151206A1 (en) * | 2021-10-01 | 2023-02-28 | Bombardier Transp Gmbh | Converter system with improved cooling of magnetic components and a railway vehicle |
| SE545022C2 (en) * | 2021-10-01 | 2023-02-28 | Bombardier Transp Gmbh | Converter system with improved cooling of magnetic components and a railway vehicle |
| WO2023052145A1 (en) | 2021-10-01 | 2023-04-06 | Bombardier Transportation Gmbh | Converter system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102015226389A1 (en) | 2016-06-30 |
| CN105730461B (en) | 2018-04-06 |
| GB2534013B (en) | 2016-12-28 |
| JP2016120812A (en) | 2016-07-07 |
| DE102015226389B4 (en) | 2018-11-15 |
| CN105730461A (en) | 2016-07-06 |
| GB201519836D0 (en) | 2015-12-23 |
| JP6385816B2 (en) | 2018-09-05 |
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