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JP4525268B2 - Cooling device for power converter - Google Patents

Cooling device for power converter Download PDF

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Publication number
JP4525268B2
JP4525268B2 JP2004271994A JP2004271994A JP4525268B2 JP 4525268 B2 JP4525268 B2 JP 4525268B2 JP 2004271994 A JP2004271994 A JP 2004271994A JP 2004271994 A JP2004271994 A JP 2004271994A JP 4525268 B2 JP4525268 B2 JP 4525268B2
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power
power converter
wind tunnel
cooling
transformer
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JP2006087269A (en
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紀好 石井
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Fuji Electric Co Ltd
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Fuji Electric Systems Co Ltd
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  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Stand-By Power Supply Arrangements (AREA)
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  • Power Conversion In General (AREA)
  • Inverter Devices (AREA)

Description

この発明は、無停電電源装置のように半導体素子で構成された電力変換器、電源の開閉および保護を行うブレーカ、電路の選択切換を行うコンタクタ、電圧の変換を行うトランスなどの各種電気機器を1つのキュービクル内に納めて構成した電力変換装置盤に関する。   The present invention relates to various types of electrical equipment such as a power converter composed of semiconductor elements such as an uninterruptible power supply, a circuit breaker that opens and closes and protects a power supply, a contactor that selects and switches electric circuits, and a transformer that converts voltage. The present invention relates to a power conversion device panel configured to be accommodated in one cubicle.

無停電電源装置の一般的な回路構成を図6に示す。   FIG. 6 shows a general circuit configuration of the uninterruptible power supply.

図6において、商用電源1からの交流電力は、ブレーカ27とコンタクタ211およびフィルタ215を経て電力変換器24へ入力するのであるが、この電力変換器24は交流電力を直流電力に変換するコンバータ241と、この直流電力を所望の電圧と周波数の交流電力に変換するインバータ242とで構成している。この電力変換器24で得られた交流電力は、フィルタ216、コンタクタ213、ブレーカ28、出力トランス15を経て負荷2へ給電される。この商用電源1から電力変換器24を経て負荷2へ交流電力を供給する回路を、以下ではライン1と称することにする。   In FIG. 6, AC power from the commercial power source 1 is input to the power converter 24 through the breaker 27, the contactor 211, and the filter 215. The power converter 24 converts the AC power into DC power. And an inverter 242 for converting the DC power into AC power having a desired voltage and frequency. The AC power obtained by the power converter 24 is fed to the load 2 through the filter 216, the contactor 213, the breaker 28, and the output transformer 15. A circuit for supplying AC power from the commercial power source 1 to the load 2 through the power converter 24 will be referred to as line 1 below.

負荷2がコンピュータのような、極めて短い時間の停電も避けなければならないような負荷である場合は、商用電源1が線路の故障(例えば地絡事故)などで停電した時、バッテリー23に蓄えられた直流電力が、ブレーカ210とコンタクタ212を介してインバータ242へ与えられ、このインバータが直流電力を交流電力に変換して負荷へ給電することにより、負荷2へ停電なしに給電することができる。   When the load 2 is a load such as a computer that must avoid a power outage for an extremely short time, it is stored in the battery 23 when the commercial power source 1 is cut off due to a line failure (for example, a ground fault). The direct current power is supplied to the inverter 242 via the breaker 210 and the contactor 212, and the inverter converts the direct current power into alternating current power and supplies it to the load, so that the load 2 can be supplied without power failure.

しかし、例えば電力変換器24のうちのインバータ242が故障すれば、商用電源1とバッテリー23が健全であっても、負荷2へ交流電力を供給することができなくなる。そこでサイリスタを逆並列接続して構成された半導体交流スイッチ251とコンタクタ252との並列回路で構成した交流スイッチ回路25を設け、商用電源1から必要な場合にだけ設置されるオプショントランス14、この交流スイッチ回路25およびブレーカ29を介して出力トランス15へ接続する保守バイパス回路を兼ねる直送給電回路を設ける。   However, for example, if the inverter 242 of the power converter 24 fails, even if the commercial power source 1 and the battery 23 are healthy, AC power cannot be supplied to the load 2. Therefore, an AC switch circuit 25 configured by a parallel circuit of a semiconductor AC switch 251 and a contactor 252 configured by connecting anti-parallel thyristors is provided, and the optional transformer 14 installed only when necessary from the commercial power source 1, this AC A direct feed power supply circuit also serving as a maintenance bypass circuit connected to the output transformer 15 via the switch circuit 25 and the breaker 29 is provided.

常時はこの交流スイッチ回路25はオフ状態(ブレーカ29はオン状態)にあり、電力変換器24から交流電力を負荷2へ供給している(ただし電力変換器24の出力交流は商用電源1と同期状態にある)が、電力変換器24に故障が生じると、直ちにその出力をオフにすると共に、交流スイッチ251をオンにすることで、商用電源1から負荷2へ交流電力を直送することにより、負荷2への停電を回避することができる。この直送給電回路を以下ではライン2と称することにする。   Normally, the AC switch circuit 25 is in an off state (breaker 29 is in an on state), and AC power is supplied from the power converter 24 to the load 2 (however, the output AC of the power converter 24 is synchronized with the commercial power source 1). However, when a failure occurs in the power converter 24, the output is immediately turned off, and the AC switch 251 is turned on, whereby the AC power is directly sent from the commercial power source 1 to the load 2. A power outage to the load 2 can be avoided. This direct feed circuit will be referred to as line 2 below.

しかし電力変換器24や交流スイッチ251が長時間故障すると、負荷2への給電を停止せざるを得なくなるから、これらの機器は定期的に点検したり、部品の交換をする必要がある。しかしながらライン1またはライン2の何れかを運転した状態では、負荷へ給電する導電線部分に電圧が加わっているから、そのまま交流スイッチ251または電力変換器24の保守・点検作業を行うと感電などの危険が伴う。
そこで交流スイッチ251とコンタクタ252の並列回路とブレーカ29とを一括して交流スイッチ台25aに搭載してユニット化し、この交流スイッチ台25aに電源側コネクタ16と負荷側コネクタ17を設け、商用電源1と負荷2との間のライン2にこの交流スイッチ台を挿脱自在に挿入することにより、ライン1より給電中であっても、交流スイッチ台25aを引出してライン2から離脱させることができるので、交流スイッチ251を安全に保守点検することができる。
However, if the power converter 24 or the AC switch 251 breaks down for a long time, power supply to the load 2 must be stopped. Therefore, these devices need to be regularly inspected and replaced. However, in the state where either line 1 or line 2 is operated, voltage is applied to the conductive wire portion that supplies power to the load. Therefore, if the AC switch 251 or the power converter 24 is maintained and inspected as it is, electric shock or the like may occur. There is danger.
Therefore, the parallel circuit of the AC switch 251 and the contactor 252 and the breaker 29 are collectively mounted on the AC switch base 25a to form a unit. The AC switch base 25a is provided with the power supply side connector 16 and the load side connector 17, and the commercial power source 1 By inserting this AC switch base into the line 2 between the load 2 and the load 2 so as to be detachable, the AC switch base 25a can be pulled out from the line 2 even when power is being supplied from the line 1. The AC switch 251 can be safely maintained and inspected.

なお、オプショントランス14は、必要な場合にのみ使用する。すなわち商用電源1が電力変換器24の電源であると同時に直送給電・保守回路の電源となる場合は、このオプショントランス14は省略できる。
前記のような無停電電源回路を構成する機器は、一般に1つのキュービクルに収容され、図7に示すようなの電力変換装置盤を構成する(特許文献1参照)。
The option transformer 14 is used only when necessary. That is, when the commercial power source 1 is the power source of the power converter 24 and the power source of the direct power feeding / maintenance circuit, the optional transformer 14 can be omitted.
The devices constituting the uninterruptible power supply circuit as described above are generally accommodated in one cubicle and constitute a power conversion device panel as shown in FIG. 7 (see Patent Document 1).

図7において、直方体のキュービクル状盤本体5の正面開口部に、開閉可能に正面扉50が取り付けられる。ベース51が盤本体5の床面設置のために設けられる。盤本体5の内部をほぼ垂直な隔壁53により前、後二つの室54a、54bに区分する。前室54aの底部に上げ底板55を設けて、これと盤本体5の底板の間に形成される連通路56を後室54bとを連通させる。前、後の各室の上部に排気用ファン57,58をそれぞれ設ける。また、正面扉50には図しない適当数の通風口が設けられ、それぞれ前室54aまたは、連通路56を介して後室54bと連通される。   In FIG. 7, a front door 50 is attached to a front opening of a rectangular cubic board 5 so as to be opened and closed. A base 51 is provided for installing the floor surface of the panel body 5. The inside of the panel body 5 is divided into two chambers 54a and 54b by a substantially vertical partition wall 53. A raised bottom plate 55 is provided at the bottom of the front chamber 54a, and a communication passage 56 formed between the bottom plate 55 and the bottom plate of the panel body 5 is communicated with the rear chamber 54b. Exhaust fans 57 and 58 are provided in the upper portions of the front and rear chambers, respectively. The front door 50 is provided with an appropriate number of ventilation openings (not shown), and communicates with the rear chamber 54b via the front chamber 54a or the communication passage 56, respectively.

前室54aの下部に図6におけるブレーカ27,28、コンタクタ211,213等の開閉機器で構成された入出力部60が、同じく交流スイッチ251、コンタクタ252からなる交流スイッチ回路25とブレーカ29を一体的に組込んで、電源側コネクタ16および負荷側コネクタ17を組み込んでユニット化した交流スイッチ台25aおよびコンバータ241、インバータ242等で構成された電力変換部70がその上に配設され、また後室54bの下部にトランス14、15および負荷へ給電する導電線15aの設けられたトランス部90が配設される。入出力部60は、主にブレーカやマグネットコンタクタ等から構成される操作部であるから、操作に便利なように装置の前側に配設される。電力変換部70は、IGBT(絶縁形バイポーラトランジスタ)などの半導体スイッチング素子や、図示しないコンデンサなどの電力変換回路を構成する電子素子を冷却フィン付き取付板81に集中的に取り付けて、ユニット化されている。電子素子は、多量の発熱があるから上部に配設される。また、トランス部90も発熱ユニットであるが、重量物であるのと比較的保守の必要がない理由で後室54bの下部に配設される。   In the lower part of the front chamber 54a, an input / output unit 60 composed of switching devices such as the breakers 27 and 28 and the contactors 211 and 213 in FIG. A power conversion unit 70 composed of an AC switch base 25a, a converter 241, an inverter 242, and the like, which are integrated into a unit by incorporating the power supply side connector 16 and the load side connector 17, and disposed thereon A transformer section 90 provided with the transformers 14 and 15 and a conductive wire 15a for supplying power to the load is disposed below the chamber 54b. Since the input / output unit 60 is an operation unit mainly composed of a breaker, a magnetic contactor, and the like, it is disposed on the front side of the apparatus for convenient operation. The power conversion unit 70 is unitized by intensively mounting a semiconductor switching element such as an IGBT (insulated bipolar transistor) and electronic elements constituting a power conversion circuit such as a capacitor (not shown) on a mounting plate 81 with a cooling fin. ing. The electronic element is disposed in the upper part because it generates a large amount of heat. The transformer unit 90 is also a heat generating unit, but is disposed in the lower portion of the rear chamber 54b because it is a heavy object and requires relatively little maintenance.

主に、電力変換部70と、トランス部90とから発生する熱を放散するために、正面扉50の図示しない通風口から取り入れられた冷却空気は、前室54aの下部から矢印のように対流により上方に流れて、前記の入出力部60と電力変換部70と接触してその熱を奪いながら上昇し、天井部の排気口から外部に放出される。そのとき、天井部に設けられた排気用ファン57が、この冷却空気の流通を強制、促進する。また、正面扉50の図示しない通風口から取り入れられた冷却空気は、矢印のように連通路56を介して後室54bの下部に入った後に上方に流れ、トランス15,14と接触してその熱を奪いながら上昇し、天井部の排気口から外部に放出される。そのとき、天井部に設けられた排気用ファン58が、冷却空気の上昇を強制、促進する。   In order to dissipate the heat generated mainly from the power conversion unit 70 and the transformer unit 90, the cooling air taken in from a ventilation port (not shown) of the front door 50 is convected from the lower part of the front chamber 54a as indicated by an arrow. As a result, the input / output unit 60 and the power conversion unit 70 are brought into contact with the input / output unit 60 and are lifted while taking heat away from the input / output unit 60 and discharged from the exhaust port of the ceiling. At that time, the exhaust fan 57 provided on the ceiling forcibly promotes the circulation of the cooling air. Further, the cooling air taken in from the vent hole (not shown) of the front door 50 flows upward after entering the lower portion of the rear chamber 54b through the communication passage 56 as shown by the arrow, and comes into contact with the transformers 15 and 14 to It rises while taking heat away and is discharged to the outside through the exhaust port of the ceiling. At that time, the exhaust fan 58 provided on the ceiling forcibly and accelerates the rise of the cooling air.

このように電力変換装置盤を構成することにより、電力変換器24を介するライン1または交流スイッチ回路25を介するライン2から負荷2へ給電するための導電線15aがトランス14,15とともに前室54aと隔壁53によって仕切られた後室に54bに収容され、前室54aからは後室54b内の給電線15a等は触れることができないので、直送給電中であっても、図6における電力変換部のブレーカ27,28をオフすることにより電力変換器24の保守点検を安全に行うことができる。
特開平9−213532号公報
By configuring the power conversion device panel in this way, the conductive line 15a for supplying power to the load 2 from the line 1 via the power converter 24 or the line 2 via the AC switch circuit 25 is provided together with the transformers 14 and 15 in the front chamber 54a. 6 is housed in a rear chamber partitioned by a partition wall 53, and the power supply line 15a in the rear chamber 54b cannot be touched from the front chamber 54a. By turning off the breakers 27 and 28, maintenance and inspection of the power converter 24 can be performed safely.
JP-A-9-213532

このように従来の電力変換装置盤においては、停電の発生を未然に防止するためにライン1または2の何れか一方のラインから給電している時でも給電を停止している側のラインの電力変換器または交流スイッチ回路などの機器の保守点検を安全に行うことができる。   As described above, in the conventional power conversion device panel, even when power is supplied from either one of the lines 1 and 2 in order to prevent the occurrence of a power failure, the power of the line on the side where the power supply is stopped is stopped. Maintenance and inspection of equipment such as a converter or an AC switch circuit can be performed safely.

しかし、この従来装置では、区画された2室に各別に排気ファンを設けて、各機器の冷却を行っているので、各室ごとに各機器の容量の増加とともに、冷却ファンの容量を増加する必要がある。それ伴って冷却ファンが大形となり、制限された設置スペース内には設置が不能となるため、装置の容量増加も制限される。このため、特に、電力変換装器は、発熱量が大きいため冷却不足により容量の制限が生じる不都合がある。   However, in this conventional apparatus, the exhaust fan is provided in each of the two compartments to cool each device, so that the capacity of each device is increased for each room and the capacity of the cooling fan is increased. There is a need. Accordingly, the cooling fan becomes large and cannot be installed in the limited installation space, so that an increase in the capacity of the apparatus is also limited. For this reason, in particular, the power conversion equipment has a disadvantage that capacity is limited due to insufficient cooling due to a large amount of heat generation.

そこで、この発明は、電力変換器への冷却空気量を増加して電力変換器の容量を増加あるいは過負荷耐量を高めることのできる直送給電回路備えた電力変換装置盤を得ることを課題とするものである。   Accordingly, an object of the present invention is to obtain a power conversion device panel having a direct feed circuit that can increase the amount of cooling air to the power converter to increase the capacity of the power converter or increase the overload capability. Is.

前記課題を解決するため、請求項1の発明は、商用電源から負荷へ電力変換器を介して給電する回路を構成する機器と、直接給電する直送給電回路を構成する機器とを前面を開閉扉により閉じられたキュービクル内に収容してなる電力変換装置盤において、盤内の後部下部に隔壁により区画された区画室を設け、この区画室に少なくとも出力トランスおよび外部への導電線を収容し、この区画室の上部に電力変換器を設置し、この電力変換器の背面側に電力変換器の冷却フィンを包み天井の排気口へ通じる風洞と天井の排気口へ連通した排気通風路とを設け、さらに前記区画室と前記電力変換器との間にそれぞれ前記区画室から吸引し前記風洞へ送風する電力変換器冷却用冷却ファンと前記排気通風路へ送風するトランス冷却用冷却ファンとを並列して設けるとともに、前記電力変換器の冷却フィンを包む風洞の垂直壁の一部を下部へ向かって風洞の通風路断面積が拡大するように傾斜させて、前記風洞の入り口の開口を前記トランス冷却用冷却ファンの上までこれに部分的に被るように拡げ、前記トランス冷却用冷却ファンの送風の一部が前記風洞へ送られるようしたことを特徴とするものである。 In order to solve the above-mentioned problem, the invention of claim 1 is characterized in that a device that constitutes a circuit that feeds power from a commercial power source to a load via a power converter and a device that constitutes a direct feed power feeding circuit that feeds power directly are opened and closed. In the power conversion device panel housed in a cubicle closed by the above, a partition chamber partitioned by a partition wall is provided at the lower rear part in the panel, and at least the output transformer and the conductive wire to the outside are stored in the partition chamber, A power converter is installed in the upper part of the compartment, and a wind tunnel that wraps the cooling fins of the power converter and leads to the ceiling exhaust port and an exhaust ventilation path that communicates with the ceiling exhaust port are provided on the back side of the power converter. Furthermore, a cooling fan for cooling the power converter that sucks air from the compartment and blows air to the wind tunnel between the compartment and the power converter, and a cooling fan for transformer cooling that blows air to the exhaust ventilation path Together provided in parallel, said tilted so that part of the vertical wall of the air channel surrounding the cooling fins of the power converter to expand ventilation passage sectional area of the air channel towards the bottom, said inlet opening of said air channel The transformer cooling fan is spread so as to partially cover it, and a part of the air blown by the transformer cooling fan is sent to the wind tunnel .

この発明によれば、電力変換器を冷却するための冷却フィン包む風洞へ、電力変換器用冷却ファンだけでなく、トランスを冷却するためのトランス用冷却ファンから冷却空気の一部を送るようにしているので、電力変換器の冷却効果が高まり、電力変換器の容量の増加または過負荷耐量を高めることができる。そして、風洞の垂直壁を下部へ向かって風洞の通風路断面積が拡大されるように傾斜させることにより、電力変換器の上部に置かれた電子素子類の位置するところで冷却空気の流速が増大するので、この部分での冷却効果がより高くなる。   According to the present invention, not only the cooling fan for the power converter but also a part of the cooling air is sent from the cooling fan for cooling the transformer to the wind tunnel that wraps the cooling fin for cooling the power converter. Therefore, the cooling effect of the power converter is enhanced, and the capacity of the power converter can be increased or the overload capability can be increased. Then, by tilting the vertical wall of the wind tunnel toward the lower part so that the cross-sectional area of the wind tunnel is enlarged, the flow velocity of the cooling air is increased at the position of the electronic elements placed above the power converter. Therefore, the cooling effect in this part is further increased.

この発明の実施例について図面を参照して説明する。   Embodiments of the present invention will be described with reference to the drawings.

図1ないし図5にこの発明による電力変換装置盤の実施例を示す。   1 to 5 show an embodiment of a power converter panel according to the present invention.

図1ないし図3は盤の外観を示すもので、図1は正面図、図2は側面図、図3は平面図である。これらの図において、30は、キュービクル状の盤本体、31aおよび31bは、正面開口に開閉可能に設けられた2枚構成の正面扉である。正面扉31a,31bの下方には、グリル状に開口された通風口32a、32bが設けられており、ここから外気が冷却空気として盤内に吸い込まれる(図1参照)。盤の天井板には金網で塞がれた排気口33が設けられている(図3参照)。
この盤には、図6に示した無停電電源装置を構成する点線枠A内の電力変換部および直送給電回路部を組込んでいる。図4は、図1のIV−IV線の側面断面図であり、図5は図4のV−V線の正面断面図である。これらの図によって盤内の機器の実装構成が示される。
1 to 3 show the appearance of the board, FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is a plan view. In these drawings, reference numeral 30 denotes a cubicle-shaped board body, and 31a and 31b are front doors having a two-piece structure provided in the front opening so as to be opened and closed. Below the front doors 31a and 31b, vent holes 32a and 32b opened in a grill shape are provided, from which outside air is sucked into the panel as cooling air (see FIG. 1). The ceiling plate of the board is provided with an exhaust port 33 closed with a wire mesh (see FIG. 3).
In this panel, a power conversion unit and a direct feed circuit unit in a dotted frame A constituting the uninterruptible power supply shown in FIG. 6 are incorporated. 4 is a side sectional view taken along line IV-IV in FIG. 1, and FIG. 5 is a front sectional view taken along line V-V in FIG. These figures show the mounting configuration of the devices in the board.

図4および図5にける各機器には、図6の対応する機器と同一の符号を付している。   Each device in FIGS. 4 and 5 is given the same reference numeral as the corresponding device in FIG.

図4および図5から明らかなように、盤本体30内の下部には、隔壁34で区画され、その内部には、図6の点線枠B内のトランス14,15およびここには図示しない外部負荷へ給電する導電線等を収容する区画室34aが設けられている。区画室34aを構成する隔壁34にはこの区画室34aと盤内とを連通させて空気が流通できるように部分的に開口(図示せず)を設け、この開口を、ここから人の手や、機器の取付けねじ等の部品が侵入できないようにするため比較的目の細かい金網等で塞ぎ、区画室内の導電線等の荷電部分に人の手や異物が接触することがないようにしている。区画室34aの周囲の空所に回路の開閉を制御するブレーカ27やコンタクタ211等を設置にする。区画室34aの上部前面の隔壁34に着脱可能なコネクタ16、17を介して交流スイッチ回路25とブレーカ29を一体的に組込んでユニット化した交流スイッチ台25aが取り付けられている。   As is clear from FIGS. 4 and 5, the lower part in the panel main body 30 is partitioned by a partition wall 34, and inside thereof are the transformers 14 and 15 in the dotted frame B of FIG. A compartment 34a is provided for accommodating a conductive wire or the like for supplying power to the load. A partition 34 constituting the compartment 34a is partially provided with an opening (not shown) so that the compartment 34a communicates with the inside of the panel so that air can flow therethrough. In order to prevent parts such as equipment mounting screws from entering, they are closed with a relatively fine wire mesh to prevent human hands and foreign objects from coming into contact with charged parts such as conductive wires in the compartment. . A breaker 27 for controlling the opening and closing of the circuit, a contactor 211, and the like are installed in a space around the compartment 34a. An AC switch base 25a, in which the AC switch circuit 25 and the breaker 29 are integrated as a unit, is attached to the partition wall 34 on the upper front surface of the compartment 34a via detachable connectors 16 and 17.

盤本体30の上部には電力変換器24のコンバータ241、インバータ242を一体的に組込んで構成した電力変換部ユニット24aを後部に冷却空気の排気通路36を残して設置する。電力変換部ユニット24aの排気通路36に臨む後面には電力変換器を構成する半導体素子の取り付けられた冷却基板に結合された冷却フィン24bを取り囲んで、冷却空気を案内する風洞35を設ける。   In the upper part of the panel body 30, a power conversion unit unit 24 a configured by integrating the converter 241 and the inverter 242 of the power converter 24 is installed at the rear part, leaving the exhaust air passage 36 for cooling air. On the rear surface facing the exhaust passage 36 of the power conversion unit 24a, there is provided a wind tunnel 35 that surrounds the cooling fins 24b coupled to the cooling substrate on which the semiconductor elements constituting the power converter are attached and guides the cooling air.

区画室34aと電力変換部ユニット24aとの間に、風洞35および排気通路36に臨んで、冷却ファン37、38を設置する。冷却ファン37は区画室34aから空気を吸い込み風洞35へ送風して電力変換器24を冷却する。冷却ファン38は区画室34aから空気を吸い込み排気通路36へ送風して主としてトランス14,15を冷却する。   Cooling fans 37 and 38 are installed between the compartment 34a and the power conversion unit 24a so as to face the wind tunnel 35 and the exhaust passage 36. The cooling fan 37 sucks air from the compartment 34 a and sends it to the wind tunnel 35 to cool the power converter 24. The cooling fan 38 sucks air from the compartment 34 a and sends it to the exhaust passage 36 to mainly cool the transformers 14 and 15.

電力変換器24を冷却する冷却フィン24aを包囲する風洞35の垂直な前面壁35aは中間から下端側に向かって通風路断面積が拡大するように傾斜している。これにより、風洞35の下端の冷却空気入口開口35bがトランス用冷却ファン37の上部に部分的に被る位置まで拡がる。   The vertical front wall 35a of the wind tunnel 35 that surrounds the cooling fin 24a that cools the power converter 24 is inclined so that the cross-sectional area of the ventilation path increases from the middle toward the lower end side. As a result, the cooling air inlet opening 35 b at the lower end of the wind tunnel 35 extends to a position partially covering the upper part of the transformer cooling fan 37.

このように構成することにより、電力変換器24を介するライン1または交流スイッチ回路25を介するライン2から負荷2へ給電するためのトランス14,15とともに隔壁34によって仕切られた区画室34aに収容された図示しない導電線等には外部から触れることができないので、直送給電中であっても、図6における電力変換部のブレーカ27,28をオフすることにより電力変換器24の保守点検を安全に行うことができる。   With this configuration, the transformer 14 and 15 for supplying power to the load 2 from the line 1 via the power converter 24 or the line 2 via the AC switch circuit 25 is housed in the compartment 34a partitioned by the partition wall 34. Since the unillustrated conductive wire or the like cannot be touched from the outside, maintenance and inspection of the power converter 24 can be safely performed by turning off the breakers 27 and 28 of the power converter in FIG. 6 even during direct power feeding. It can be carried out.

また、冷却ファン37,38を運転すると、図4に矢印で示すように、盤本体30の正面扉31a,31bの通風口から盤内に外気を吸引し、区画室34aから、冷却ファン37,38を介して、電力変換器24を冷却する風洞35および排気通路36へ冷却空気として送り、盤の天井板の排気口33から排気することにより、盤内の各種機器、区画室34a内のトランスおよび盤上部の電力変換器24を冷却する。このとき、風洞の前面壁35aが傾斜して風洞の下端の冷却空気入口開口が拡大されているため、風洞35内には、電力変換器用冷却ファン37からだけでなく、トランス用冷却ファン38から送られる冷却空気の一部が送られるため、風洞35内への送られる冷却空気の量が増大する。したがって、電力変換器の24の冷却効果が高まり、電力変換器24の温度上昇が抑えられるため、その出力容量を増大することができるとともに過負荷耐量を高めることができる。   Further, when the cooling fans 37 and 38 are operated, as indicated by arrows in FIG. 4, outside air is sucked into the panel from the ventilation openings of the front doors 31a and 31b of the panel body 30, and the cooling fan 37 and 38 is sent as cooling air to the wind tunnel 35 and the exhaust passage 36 for cooling the power converter 24 and exhausted from the exhaust port 33 of the ceiling plate of the panel, whereby various devices in the panel and the transformer in the compartment 34a. And the power converter 24 at the top of the panel is cooled. At this time, since the front wall 35a of the wind tunnel is inclined and the cooling air inlet opening at the lower end of the wind tunnel is enlarged, not only from the power converter cooling fan 37 but also from the transformer cooling fan 38 in the wind tunnel 35. Since a part of the cooling air to be sent is sent, the amount of the cooling air sent into the wind tunnel 35 increases. Therefore, the cooling effect of the power converter 24 is enhanced and the temperature rise of the power converter 24 is suppressed, so that the output capacity can be increased and the overload capability can be increased.

風洞35の前面壁の中間より下の部分を傾斜させることにより、風洞35の上部の通風路断面積が狭くなるので、この通風路断面積が狭くなる部分において冷却空気の流速が速くなり、これによっても電力変換器24の冷却効果を高めることができるので、電力変換器24の冷却を良好に行なうことができる。   By inclining the portion below the middle of the front wall of the wind tunnel 35, the cross-sectional area of the ventilation path at the top of the wind tunnel 35 is narrowed, so that the flow velocity of the cooling air is increased in the portion where the cross-sectional area of the ventilation path is narrowed. As a result, the cooling effect of the power converter 24 can be enhanced, so that the power converter 24 can be cooled well.

この発明の実施例の外観を示す正面図。The front view which shows the external appearance of the Example of this invention. この発明の実施例の外観を示す側面図。The side view which shows the external appearance of the Example of this invention. この発明の実施例の外観を示す平面図。The top view which shows the external appearance of the Example of this invention. 図1のIV−IV線の側面断面図。FIG. 4 is a side sectional view taken along line IV-IV in FIG. 図2のV−V線の正面断面図。Front sectional drawing of the VV line | wire of FIG. 一般的な無停電電源装置を構成する電力変換器のブロック構成図回路。The block block diagram circuit of the power converter which comprises a general uninterruptible power supply. 従来の電力変換装置盤を示す側面断面図。Side surface sectional drawing which shows the conventional power converter device panel.

符号の説明Explanation of symbols

14、15:トランス
24:電力変換器
24b:冷却フィン
30:盤本体
34a:区画室
35:風洞
36:排気通風路
37、38:冷却ファン

14, 15: Transformer 24: Power converter 24b: Cooling fin 30: Panel body 34a: Compartment 35: Wind tunnel 36: Exhaust air passage 37, 38: Cooling fan

Claims (1)

商用電源から負荷へ電力変換器を介して給電する回路を構成する機器と、直接給電する直送給電回路を構成する機器とを前面を開閉扉により閉じられたキュービクル内に収容してなる電力変換装置盤において、盤内の後部下部に隔壁により区画された区画室を設け、この区画室に少なくとも出力トランスおよび外部への導電線を収容し、この区画室の上部に電力変換器を設置し、この電力変換器の背面側に電力変換器の冷却フィンを包み天井の排気口へ通じる風洞と天井の排気口へ連通した排気通風路とを設け、さらに前記区画室と前記電力変換器との間にそれぞれ前記区画室から吸引し前記風洞へ送風する電力変換器冷却用冷却ファンと前記排気通風路へ送風するトランス冷却用冷却ファンとを並列して設けるとともに前記電力変換器の冷却フィンを包む風洞の垂直壁の一部を下部へ向かって風洞の通風路断面積が拡大するように傾斜させて、前記風洞の入り口の開口を前記トランス冷却用冷却ファンの上までこれに部分的に被るように拡げ、前記トランス冷却用冷却ファンの送風の一部が前記風洞へ送られるようしたことを特徴とする電力変換装置盤。 A power conversion device in which a device that constitutes a circuit that feeds power from a commercial power source to a load via a power converter and a device that constitutes a direct feed power supply circuit that directly feeds power are housed in a cubicle whose front face is closed by an open / close door In the panel, a partition room partitioned by a partition wall is provided in the lower rear part of the panel, and at least an output transformer and an external conductive wire are accommodated in the partition room, and a power converter is installed in the upper part of the partition room. Provided on the back side of the power converter is a wind tunnel that wraps the cooling fins of the power converter and communicates with the exhaust outlet of the ceiling, and an exhaust ventilation path that communicates with the exhaust outlet of the ceiling, and further between the compartment and the power converter cold of the power converter with the respective provided in parallel with transformer cooling fan for blowing the power converter cooling fan for blowing air to the suction and the air channel to the exhaust air passage from said compartment A part of the vertical wall of the wind tunnel that wraps the fins is inclined downward so that the cross-sectional area of the wind tunnel increases, and the opening at the entrance of the wind tunnel is partially extended above the cooling fan for the transformer cooling. The power conversion device panel is characterized in that a part of the air blown from the cooling fan for transformer cooling is sent to the wind tunnel .
JP2004271994A 2004-09-17 2004-09-17 Cooling device for power converter Expired - Lifetime JP4525268B2 (en)

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