CN105703633A - Cooling device of power converter - Google Patents

Cooling device of power converter Download PDF

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Publication number
CN105703633A
CN105703633A CN201510750264.3A CN201510750264A CN105703633A CN 105703633 A CN105703633 A CN 105703633A CN 201510750264 A CN201510750264 A CN 201510750264A CN 105703633 A CN105703633 A CN 105703633A
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CN
China
Prior art keywords
cooling air
power conversion
flow
conversion device
carry out
Prior art date
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Pending
Application number
CN201510750264.3A
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Chinese (zh)
Inventor
市位嘉崇
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Fuji Electric Co Ltd
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Fuji Electric Co Ltd
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Publication date
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Publication of CN105703633A publication Critical patent/CN105703633A/en
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Abstract

A cooling device of a power converter can approximately equably cool a plurality of constitution elements when the plurality of constitution elements arranged in a row of the power converter are vented an cooled. The cooling device comprises a cylindrical dividing chamber, the dividing chamber has openings as an inlet and outlet of cooling air at two ends and is configured to forced crossflow for cooling air from one end towards the other end, a plurality of constitution elements forming the power converter are linearly arranged in a row in a flow direction of the cooling air in the dividing chamber, and the constitution elements are cooled by using the cooling air crossflowing in the dividing chamber. The cooling device is provided with a ventilation space, the ventilation space is adjacent to a lower side of the bottom wall of the dividing chamber and extends parallel to the bottom wall of the dividing chamber for ventilation of the cooling air, the plurality of constitution elements are linearly arranged on the bottom wall of the dividing chamber in a row in a manner of separating appropriate intervals, and the front the constitution elements adjacent to the bottom wall is provided with ventilation openings respectively communicated with the ventilation space.

Description

The chiller of power conversion device
Technical field
The present invention relates to the chiller of a kind of key element constituting inverter constant power conversion equipment。
Background technology
In general, in power conversion device, the element that particularly caloric value is big, rouse send cooling air to cool down to suppress the rising of temperature。In this case, include the element of many electrolysis condenser in the smoothing capacity device of the direct-flow intermediate circuit being used in power conversion device such as Patent Document 1, sometimes linearly arrange with string or multiple row along direction of ventilation in the wind-tunnel of cooling air circulation。
Fig. 6 and Fig. 7 represents the example of the power conversion device including the conventional chiller shown in patent documentation 1。Fig. 6 represents the outward appearance of power conversion unit 50, and Fig. 7 represents this unit 50 is encased in main body container 5a the power conversion device 5 constituted。
Power conversion unit 50 as shown in Figure 6, including the cooling water-cooled supplied from feed pipe 51a, 51b cooling by water body 51 but。The cooling wind-tunnel 55 to the tubular that cooling air guides it is provided with this cooling body 51 in the way of being connected。In this cooling wind-tunnel 55, in the way of running through this cooling wind-tunnel 55, it is inserted with the main composition element of power conversion device, i.e. multiple capacitors 56, and these capacitors 56 are cooled。In one end of cooling wind-tunnel 55, it is combined with the cooler 57 being made up of heat exchanger 58 and cooling fan 59 as shown in Figure 7, cooling air is transported in wind-tunnel 55。Additionally, the face contrary with the face being incorporated into wind-tunnel of cooling body 51 is combined with semiconductor module block element 52, this semiconductor module block element 52 constitutes rectification circuit and the main circuit of inverter circuit constant power conversion equipment, by semiconductor rectifier cell and thyristor being formed as module and constitute this semiconductor module block element 52。
Constitute the cooling body 51 after the semiconductor module block element 52 of the main circuit in the conventional power conversion device so constituted is water cooled effectively to cool down。
Further, become the cooling air drum of low temperature by utilizing heat exchanger 58 to carry out heat exchange from cooler 57 to deliver in the cooling wind-tunnel 55 being inserted with capacitor 56。This cooling air through-flow as shown by the arrows in Figure 7 in wind-tunnel 55, flows out in container 5a from the other end。The cooling air flowed out is guided by wind direction guided plate 61 etc. in container 5a and again returns in cooler 57, is transported in wind-tunnel 55, is circulated through wind-tunnel 55 in container 5a。, cool down air and capacitor 56 is cooled down in the process of through-flow at cooling air in wind-tunnel。
So, in conventional power conversion device, element, i.e. semiconductor module block element 52 and capacitor 56 cooled body 51 and cooling wind-tunnel 55 that caloric value is big cool down effectively, remain set point of temperature。
But, it is provided with multiple capacitors 56 relation because of the overall space etc. of power conversion device 5, and in wind-tunnel 55, is linearly arranged into string。When the multiple capacitor 56 of configuration so in column, relative to the gas flow arrangement of the cooling air in wind-tunnel 55 in the capacitor faces of most prime to cooling fan 59, therefore cooling air substantially abuts with the half side face of main part, carries out good cooling。But, separate, from the cooling air of cooling fan 59 conveying of cooler 57, the both sides flowing wind-tunnel because of the capacitor of most prime, stream arrives between each capacitor hardly。Therefore, the area with cooling air contact of each capacitor in the downstream that the second level is later reduces, and therefore cooling effect declines。When the multiple capacitor of so linearly arrayed in columns, exist and be difficult to cool down the problem that multiple capacitor is overall equably。
Prior art literature
Patent documentation
Patent documentation 1: 2012 No. 105426 publications of Japanese Unexamined Patent Publication
Summary of the invention
The problem that the present invention is to solve above-mentioned conventional power conversion device, when solving the technical problem that being in that offer is a kind of is aerated in multiple elements of arrayed in columns power conversion device cooling down, it is possible to cool down the chiller of the power conversion device of multiple element substantially uniformly。
In order to solve this technical problem, the chiller of the power conversion device of the present invention includes the division room becoming cooling wind-tunnel, above-mentioned division room has the opening of the gateway becoming cooling air at two ends, and it is configured to carry out towards the other end pressure through-flow of cooling air from one end, in the indoor flow direction along above-mentioned cooling air of this division linearly multiple elements being configured with composition power conversion device in column, utilize the cooling air at above-mentioned division indoor through-flow that above-mentioned element is cooled down, it is characterized in that, the chiller of above-mentioned power conversion device is provided with airspace, adjacent with the lower section of the diapire of above-mentioned division room and with above-mentioned division room the diapire of above-mentioned airspace extends parallel to, for the circulation of above-mentioned cooling air, by multiple above-mentioned elements by the way of sky opens appropriate intervals linearly on the diapire being arranged in above-mentioned division room in column, the front of each above-mentioned element of this diapire is provided with the vent connected respectively with above-mentioned airspace。
In the present invention, on the diapire of above-mentioned division room, the ventilation guide plate in above-mentioned airspace can be extended in the rear end being provided with from above-mentioned vent。Additionally, it is preferred that this ventilation guide plate to tilt in the way of the decline of the upstream side in the through-flow direction of above-mentioned cooling air, and, more preferably, the length of each above-mentioned ventilation guide plate increases towards downstream gradually along with the upstream in the through-flow direction from above-mentioned cooling air。
Additionally, in the present invention, partition wall can be utilized to be separated the division room of the above-mentioned division room with the through-flow that can not carry out cooling air adjacent to this division room that can carry out the through-flow of cooling air, above-mentioned partition wall is made up of the partition wall of insulating properties, the terminal that connects making to be housed in the indoor element of the above-mentioned division of the through-flow that can carry out cooling air runs through the partition wall of above-mentioned insulating properties and is exposed to the above-mentioned division of the through-flow that can not carry out cooling air indoor, carries out required electrical connection in these division indoor of the through-flow that can not carry out cooling air。
Adopting the present invention, multiple elements, to arrange airspace in the way of the lower section of the diapire of the ventilation path of linearly configuration in column, are provided with, in the front of above-mentioned each element of diapire, the vent connected respectively with above-mentioned airspace。Thus, cooling air is made to be flowed in the space between each element the diapire being arranged in ventilation path from airspace。As a result of which it is, the contact area with cooling air of all elements expands, overall cooling effect improves, and independently can cool down multiple element equably with allocation position。
Accompanying drawing explanation
Fig. 1 indicates that the axonometric chart of the outward appearance of the embodiment of power conversion unit used in this invention。
The longitudinal section of the embodiment of the power conversion unit that Fig. 2 is used in the present invention。
The sectional elevation of the embodiment of the power conversion unit that Fig. 3 is used in the present invention。
Fig. 4 indicates that the partial perspective view of the bottom wall portion of the ventilation path of the power conversion unit according to the present invention。
Fig. 5 indicates that the longitudinal section of the embodiment of the power conversion device loaded by the power conversion unit according to the present invention and constitute。
Fig. 6 indicates that the axonometric chart of the outward appearance of conventional power conversion unit。
Fig. 7 is loaded into the sectional elevation of the power conversion device of conventional power conversion unit。
(symbol description)
10 ... power conversion unit;11 ... main body container;12 ... input terminal;13 ... lead-out terminal;14,16 ... the division room of the through-flow of cooling air can be carried out;15 ... the division room of the through-flow of cooling air can not be carried out;17 ... capacitor;18 ... the partition wall of insulating properties;19 ... partition wall;21 ... semiconductor module block element;22 ... cooling body;23,25,27 ... connect conductor;24 ... protection switch;26 ... by-pass unit;28 ... base frame;29 ... airspace。
Detailed description of the invention
The embodiment utilizing diagram illustrates embodiments of the present invention。
[embodiment]
Fig. 1 to Fig. 5 represents the embodiment of the power conversion device of the present invention。
In FIG, symbol 10 is power conversion unit。In the front-surface side of the container 11 of the main body constituting this unit 10, it is provided with the input terminal 12 for being connected and the lead-out terminal 13 for being connected with load with alternating current power supply。Many the elements constituting power conversion device it are accommodated with in container 11。
It addition, as in figure 2 it is shown, the inside of container 11 is separated into three layers by partition wall 18,19。The upper and lower floor being separated into three layers by partition wall 18,19 is to divide room 14,16。Divide room 14,16 to be able to for cooling air through-flow, be formed as the cooling wind-tunnel including becoming opening 14a, 14b, 16a, 16b of the gateway of cooling air at two ends。At least one end dividing room 15 in middle level is closed, and is configured to carry out the through-flow of cooling air。
Being formed in the division room 14 of wind-tunnel of the through-flow that can carry out cooling air, as it is shown on figure 3, be accommodated with nine smooth to be used as element with electrolysis condenser 17, open suitable compartment of terrain with linearity sky each other and be configured to three layers, three row。These capacitors 17 are fixed on the diapire 14c dividing room 14 by fixture 17b。Further, the connection terminal 17a of the upper end being arranged on capacitor 17 runs through separating the partition wall 18 dividing room 14 and division room 15, exposes in division room 15。
Container 11 entirety is made up of metallic plates such as steel plates, has electric conductivity, but partition wall 18 is made up of insulating properties thin plates such as the insulative synthetic resin thin plates without electric conductivity。Therefore, the insulation distance connecting terminal 17a and partition wall 18 of the capacitor run through by partition wall 18 must be considered hardly。Further, it is arranged on this separation wall owing to the prominent upper surface connecting terminal 17a of capacitor 17 can be made to contact with separation wall, therefore the whole main part of capacitor 17 can be accommodated in the division room 14 of the through-flow that can carry out cooling air。
The semiconductor module block element 21 making the semiconductor rectifier cell of the main circuit of composition power converter and thyristor be formed as module and obtain, includes connecting terminal 21a and is all housed in the division room 15 of structure of the through-flow that can not carry out cooling air。In order to cool down above-mentioned semiconductor module block element 21 and the cooling body 22 with cooling fins connecting terminal 21a and being combined with semiconductor module block element 21 and connection terminal 21a, partition wall 19 is run through and becomes in the way of being housed in the through-flow so that cooling air can be carried out in the division room 16 of wind-tunnel。
In division room 15, the terminal 21a of module component 21 is connected conductor 23 with the terminal 17a of capacitor 17 by the main circuit utilizing rod-shaped conductors to constitute and is electrically connected to each other。Thus, circuit for power conversion is constituted。The input terminal 12 being arranged on the front surface of container 11 is suitably incorporated in division room 15 by the connected conductor 25 of protection switch 24 with lead-out terminal 13, is connected with the input/output terminal of circuit for power conversion。Also containing by-pass unit 26 dividing in room 15, by-pass unit 26 utilizes connection conductor 27 to be connected with the outfan of circuit for power conversion。By-pass unit 26 is for when power conversion unit there occurs fault, walking around this power conversion unit (making this power conversion unit short circuit), proceed operating merely with other normal unit。
Additionally, the container 11 constituting main body is combined with base frame 28 in lower end。The both ends open of this base frame 28, is containing the airspace 29 that can circulate formed below dividing room 14 of capacitor 17 for cooling air。Further, on the diapire 14c of supporting capacitor 17 dividing room 14, it is provided with, relative to the direction of the through-flow of the cooling air of each capacitor 17, the vent 14d connected respectively with airspace 29 in front。And, definitely, base wall panel 14c can be cut to airspace 29 side in the front (the downstream side in the through-flow direction of cooling air) of each vent 14d and forms ventilation guide plate 14e with reference to the Fig. 4 representing the structure observing diapire 14c from base frame side。The ventilation guide plate 14e room 14 that divides upward guides the cooling air of circulation in airspace 29, to tilt in the way of liter relative on the through-flow direction of cooling air。It addition, in order to make from airspace 29 through each vent 14d flow equalization to the cooling air dividing guiding in room 14, the closer to the downstream in the through-flow direction of cooling air, the length making each ventilation guide plate 14e is more long。
Using the power conversion unit 10 so constituted of multiple stage, three-phase each phase as one group, as illustrated in fig. 7 laminated multi-layer and house in high-tension distribution panel 10。Such as when the rated voltage of power conversion unit 10 is 1kV, when Dang Gexiang is serially connected the lead-out terminal of the power conversion unit 10 of five and uses, it is possible to the voltage of output 6kV。
Front-surface side at the housing 1a of power conversion device 1 is provided with the air inlet 1c covered by filter 1b, and side is provided with the ventilation path 1d that three power conversion units 10 share overleaf。Further, the roof of ventilation path 1d offers air vent 1e, be provided with the cooling fan 1f of attraction type at air vent 1e place。
By driving cooling fan 1f, extraneous air is made to enter in housing 1a from the air inlet 1c of front surface through filter 1b。In the process by filter 1b, the major part of dust contained in extraneous air is removed, but fails to be completely removed, therefore the small dust of residual minim in the extraneous air entered。
The extraneous air entered in housing 1a carries out through-flow as depicted by the solid-line arrows as cooling air in housing 1a, discharges from air vent 1e。
In each power conversion unit 10, as also shown in Figure 2, the room 14,16 that divides of the wind-tunnel that upper and lower the becoming being arranged on main body container 11 can carry out cooling down the through-flow of air connects with the ventilation path 1d of housing 1a。Cooling air through-flow in this division room 14,16。Utilize the cooling air at this division indoor through-flow, carry out forcing cooling to being housed in the indoor element of this division, i.e. the cooling body 22 of capacitor 17 and semiconductor module block element 21。
But, owing to the constitution equipment being housed in division room 14,16 is implemented insulation processing, even if therefore small dust is attached on the surface of these constitution equipments, without insulation obstacle occurs。
The conductor 23,25,27 that connects constituting main circuit is housed in the division room 15 in middle level。The rear end side dividing room 15 is closed, and is configured to carry out the through-flow of cooling air, and therefore cooling air will not dividing through-flow in room 15。Therefore, small dust contained in cooling air is attached on the connection conductor constituting main circuit hardly, the insulation obstacle caused of piling up of dust be suppressed。Thus, can be formed as this division room 15 maintaining the minimum space needed for electrical insulation capability。
As a result of which it is, in the power conversion unit of the present invention, even if making introduction have the cooling air through-flow of extraneous air to carry out forcing cooling, the long-time stable operating of insulation obstacle ground also can not be there is。
When so having carried out forced draft cooling in power conversion device 1, in each power conversion unit 10, cooling air such as Fig. 2 and Fig. 3 carries out through-flow shown in solid arrow and dotted arrow。Particularly, cooling down air from airspace 29 adjacent with dividing room 14 the division room 14 contain capacitor 17 with what dotted arrow represented, the vent 14d between each capacitor 17 being arranged on diapire 14c is flowed in capacitor 17 space to each other。Flowing in space between each capacitor 17 shown in dotted arrow in this cooling air such as Fig. 2 and Fig. 3, therefore, it is possible to utilize this cooling air by the front and rear surfaces of capacitor 17 arranged side by side for front and back and side cooling。Thereby, it is possible to well and equably by the later capacitor in the second level 17 that is arranged in divided in room 14 cool down。
In order to more efficiently carry out the cooling undertaken by the cooling air from this airspace 29, base wall panel 14c is provided with the ventilation guide plate 14e rolling tiltedly extension from vent 14d to airspace 29。This ventilation guide plate 14e amount that can flow into the cooling air in the space between each capacitor is utilized to increase。Further, the length of each ventilation guide plate 14e being formed as compared with the upstream side in the through-flow direction of cooling air, downstream is longer better。When so arranged, the amount equalization cooling down air between each capacitor can be flowed into, all capacitors are cooled down more equally。
It addition, in the present invention, also power conversion unit can be used alone。In this case, the cooling fan of attraction type is directly installed in the side being provided with air vent of main body container, makes cooling air carry out forcing through-flow to cool down at internal tank。

Claims (5)

1. the chiller of a power conversion device, including the division room becoming cooling wind-tunnel, described division room has the opening of the gateway becoming cooling air at two ends, and it is configured to carry out towards the other end pressure through-flow of cooling air from one end, in the indoor flow direction along described cooling air of this division linearly multiple elements being configured with composition power conversion device in column, utilize and at the described cooling air dividing indoor through-flow, described element is cooled down, it is characterized in that
The chiller of described power conversion device is provided with airspace, adjacent with the lower section of the diapire of described division room and with described division room the diapire of described airspace extends parallel to, for the circulation of described cooling air, by multiple described elements in the way of sky opens appropriate intervals linearly on the diapire being arranged in described division room in column, to be provided with, near the front of each described element of this diapire, the vent connected respectively with described airspace。
2. the chiller of power conversion device as claimed in claim 1, it is characterised in that
The diapire of described division room is provided with the ventilation guide plate that the rear end from described vent extends in described airspace。
3. the chiller of power conversion device as claimed in claim 2, it is characterised in that
Described ventilation guide plate to tilt in the way of the decline of the upstream side in the through-flow direction of described cooling air。
4. the chiller of power conversion device as claimed in claim 2 or claim 3, it is characterised in that
The length of each described ventilation guide plate increases towards downstream gradually along with the upstream in the through-flow direction from described cooling air。
5. the chiller of the power conversion device as according to any one of Claims 1-4, it is characterised in that
Partition wall is utilized to be separated the division room of the described division room with the through-flow that can not carry out cooling air adjacent to this division room that can carry out the through-flow of cooling air, described partition wall is made up of the partition wall of insulating properties, make to be housed in that the through-flow that can carry out cooling air described divide indoor element connects the described indoor that divide that terminal runs through the partition wall of described insulating properties and is exposed to the through-flow that can not carry out cooling air, carry out required electrical connection in these division indoor of the through-flow that can not carry out cooling air。
CN201510750264.3A 2014-12-15 2015-11-06 Cooling device of power converter Pending CN105703633A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-253036 2014-12-15
JP2014253036A JP2016116328A (en) 2014-12-15 2014-12-15 Cooling device of power conversion apparatus

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CN105703633A true CN105703633A (en) 2016-06-22

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6758571B2 (en) * 2016-12-13 2020-09-23 株式会社デンソー Power converter

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EP0706221A2 (en) * 1994-10-07 1996-04-10 Hitachi, Ltd. Semiconductor device comprising a plurality of semiconductor elements
CN1337755A (en) * 2000-08-03 2002-02-27 三洋电机株式会社 Power-supply apparatus
JP2004356130A (en) * 2003-05-27 2004-12-16 Mitsubishi Electric Corp Power converter
JP2006087269A (en) * 2004-09-17 2006-03-30 Fuji Electric Systems Co Ltd Cooler for power converter
CN202309552U (en) * 2010-11-09 2012-07-04 富士电机株式会社 Power conversion device and power driving car with power conversion device
CN203398979U (en) * 2013-08-02 2014-01-15 广东明阳龙源电力电子有限公司 Large-power wind power converter with high-efficiency air channel to radiate heat

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JPS5132375B2 (en) * 1971-11-30 1976-09-11
JPH02133996A (en) * 1988-11-15 1990-05-23 Fujitsu Ltd Cooling structure of electronic equipment
JP2007184464A (en) * 2006-01-10 2007-07-19 Toshiba Corp Railroad vehicle control unit
JP2008103576A (en) * 2006-10-20 2008-05-01 Yaskawa Electric Corp Motor controller
JP6040843B2 (en) * 2013-04-03 2016-12-07 株式会社デンソー Battery cooling device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0706221A2 (en) * 1994-10-07 1996-04-10 Hitachi, Ltd. Semiconductor device comprising a plurality of semiconductor elements
CN1337755A (en) * 2000-08-03 2002-02-27 三洋电机株式会社 Power-supply apparatus
JP2004356130A (en) * 2003-05-27 2004-12-16 Mitsubishi Electric Corp Power converter
JP2006087269A (en) * 2004-09-17 2006-03-30 Fuji Electric Systems Co Ltd Cooler for power converter
CN202309552U (en) * 2010-11-09 2012-07-04 富士电机株式会社 Power conversion device and power driving car with power conversion device
CN203398979U (en) * 2013-08-02 2014-01-15 广东明阳龙源电力电子有限公司 Large-power wind power converter with high-efficiency air channel to radiate heat

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