JPH0419994Y2 - - Google Patents
Info
- Publication number
- JPH0419994Y2 JPH0419994Y2 JP1983012659U JP1265983U JPH0419994Y2 JP H0419994 Y2 JPH0419994 Y2 JP H0419994Y2 JP 1983012659 U JP1983012659 U JP 1983012659U JP 1265983 U JP1265983 U JP 1265983U JP H0419994 Y2 JPH0419994 Y2 JP H0419994Y2
- Authority
- JP
- Japan
- Prior art keywords
- phase inverter
- reactor
- inverter
- output
- parallel
- 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.)
- Expired
Links
- 238000004804 winding Methods 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 5
- 239000013598 vector Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Power Conversion In General (AREA)
Description
【考案の詳細な説明】
本考案は、複数のインバータユニツトを並列接
続して大容量化を図る場合に用いる単相インバー
タの出力フイルタ回路に関するものである。[Detailed Description of the Invention] The present invention relates to an output filter circuit for a single-phase inverter used when a plurality of inverter units are connected in parallel to increase capacity.
CVCF(定電圧定周波電源)装置や無停電電源
装置には一般にサイリスタインバータが使用され
ている。その出力波形は基本的には矩形波であ
り、正弦波に近似させるために出力フイルタが使
用されている。 Thyristor inverters are generally used in CVCF (constant voltage constant frequency power supply) devices and uninterruptible power supply devices. The output waveform is basically a rectangular wave, and an output filter is used to approximate it to a sine wave.
例えば第1図に示すようにインバータユニツト
INVの出力側の出力変圧器T0の後段にリアクト
ルLとコンデンサCからなる逆L形のフイルタ回
路を設けるか、あるいは第2図に示すように第1
図のフイルタ回路のリアクトルLを出力変圧器
T0の1次側に移した構成とする。 For example, as shown in Figure 1, an inverter unit
An inverted L-shaped filter circuit consisting of a reactor L and a capacitor C is installed after the output transformer T 0 on the output side of the INV, or a first
The reactor L of the filter circuit shown in the figure is connected to the output transformer.
The configuration is moved to the primary side of T 0 .
ところで、単相インバータの大容量化に際して
は、複数のインバータユニツトを並列接続する手
段がとられるが、第3図に示すようにユニツト
INV1,INV2を出力変圧器T0を共用する形で並
列接続したのでは、電流I1,I2の分担はサイリス
タ(またはダイオード)のドロツプ電圧と回路イ
ンピーダンスで決まるため、大幅にアンバランス
を生じることがある。通常の交流リアクトル構成
では(−)側アームがアンバランスとなる。 By the way, when increasing the capacity of single-phase inverters, means are taken to connect multiple inverter units in parallel, but as shown in Figure 3,
If INV 1 and INV 2 are connected in parallel so that they share the output transformer T 0 , the distribution of currents I 1 and I 2 is determined by the drop voltage of the thyristor (or diode) and the circuit impedance, resulting in a significant imbalance. may occur. In a normal AC reactor configuration, the (-) side arm becomes unbalanced.
このため、第4図に示すように各ユニツト
INV1,INV2,……毎に1次巻線m1,m2,……
を有する出力変圧器T0′を設け、そのインピーダ
ンスで電流分担を均等化する必要があり、特殊な
変圧器を製作しなければならない。また、出力変
圧器を省いたり、単巻変圧器を用いたのでは電流
分担を均等化することができない。 Therefore, as shown in Figure 4, each unit
Primary winding m 1 , m 2 , ... for each INV 1 , INV 2 , ...
It is necessary to provide an output transformer T 0 ' with an output transformer T 0 ' and equalize the current sharing by its impedance, and a special transformer must be manufactured. Furthermore, if the output transformer is omitted or an autotransformer is used, the current sharing cannot be equalized.
本考案は上記の点を考慮してなされたもので、
巻線を2分割して両側配置とすることにより、ユ
ニツト並列時の電流分担の適切化に寄与できる単
相インバータの出力フイルタ回路を提供すること
を目的とする。 This invention was made taking the above points into consideration.
It is an object of the present invention to provide an output filter circuit for a single-phase inverter that can contribute to appropriate current sharing when units are paralleled by dividing the winding into two and arranging them on both sides.
以下、本考案を図示の実施例に基づいて詳細に
説明する。 Hereinafter, the present invention will be explained in detail based on illustrated embodiments.
第5図は本考案の一実施例を示すもので、
INV1〜INVoはインバータユニツト、L1〜Loは
各ユニツトに対応するリアクトル、Cは各ユニツ
ト共通のコンデンサである。前記リアクトルL1
〜Loは第6図に示すように鉄心Yに必要とする
巻数の巻線を2分割した形で、互いに電流ベクト
ルを加える極性で二つの巻線l1,l2を巻装したも
のであり、外形寸法としては一つの巻線の場合と
略同寸法となる。二つの巻線l1,l2は各ユニツト
共両側配置となるように分散して位置させ、負荷
Z側の巻線端をコンデンサC(仮想線で示すよう
に出力変圧器T0が設置される場合はこの変圧器
の1次巻線)に接続している。 FIG. 5 shows an embodiment of the present invention.
INV 1 to INV o are inverter units, L 1 to Lo are reactors corresponding to each unit, and C is a capacitor common to each unit. Said reactor L 1
~L o is a form in which the number of turns required for iron core Y is divided into two as shown in Fig. 6, and two windings l 1 and l 2 are wound with polarities that add current vectors to each other. The external dimensions are approximately the same as in the case of one winding. The two windings l 1 and l 2 are distributed so that each unit is located on both sides, and the end of the winding on the load Z side is connected to a capacitor C (as shown by the phantom line, an output transformer T 0 is installed). (if the transformer is connected to the primary winding of this transformer).
このような構成とすると、各電流路にフイルタ
回路のリアクトルの一部が存在するようになり、
インバータユニツトINV1〜INVoを並列接続して
大容量化を図つた場合にも電流分担が適切とな
り、リアクトルL1〜Loを精度よく製作すれば各
インバータユニツトの電流分担は出力変圧器T0
の有無に関係なく良好となる。また、第5図の点
線枠で示す部分をインバータ盤とすれば、盤増設
だけで大容量化が可能であり全体の設備構成が非
常に簡単になる。 With this configuration, a part of the reactor of the filter circuit will exist in each current path,
Even if inverter units INV 1 to INV o are connected in parallel to increase the capacity, the current sharing will be appropriate. If the reactors L 1 to L o are manufactured accurately, the current sharing for each inverter unit will be equal to the output transformer T. 0
It is good regardless of the presence or absence of. Furthermore, if the portion indicated by the dotted line frame in FIG. 5 is used as an inverter panel, it is possible to increase the capacity simply by adding more panels, and the overall equipment configuration becomes extremely simple.
なお、出力変圧器を設置する場合には、出力変
圧器として単巻変圧器を使用できる。また、イン
バータの多重化に際してインバータユニツトを並
列するときにも適用可能であり、多重変圧器の前
で並列可能となる。 Note that when installing an output transformer, an autotransformer can be used as the output transformer. It can also be applied when inverter units are connected in parallel when multiplexing inverters, and can be connected in parallel in front of a multiplex transformer.
以上のように本考案によれば、リアクトルを二
つの巻線に分割して分散配置としたので、このリ
アクトルによりインバータユニツト並列時の電流
分担の均等化が可能となり、特殊な出力変圧器を
用いることなく単相インバータの大容量化が図れ
る。しかも、リアクトルを出力変圧器の1次側に
設置する構成のものや出力変圧器不使用のもので
はインバータ盤に組込み、盤並列数の増加だけで
容量の増加が可能となる。さらに、異なる容量の
インバータユニツトの並列も容易であり、しかも
リアクトルはフイルタとしても動作する。 As described above, according to the present invention, the reactor is divided into two windings and arranged in a distributed manner, so this reactor makes it possible to equalize the current sharing when inverter units are paralleled, and a special output transformer is used. It is possible to increase the capacity of a single-phase inverter without increasing the capacity. Furthermore, in a configuration in which a reactor is installed on the primary side of an output transformer or in a configuration in which an output transformer is not used, the capacity can be increased simply by incorporating the reactor into the inverter panel and increasing the number of parallel panels. Furthermore, inverter units of different capacities can be easily paralleled, and the reactor also operates as a filter.
第1図、第2図はサイリスタインバータの出力
波形改善のためのフイルタ回路の構成例を示すブ
ロツク図、第3図はインバータユニツト並列時に
おける電流分担のアンバランスを説明するための
回路図、第4図は従来の大容量単相インバータの
ブロツク図、第5図は本考案に係る単相インバー
タの出力フイルタ回路の一実施例を示す回路図、
第6図は同実施例におけるリアクトルの構成略図
である。
INV1〜INVo……インバータユニツト、L1〜
Lo……リアクトル、Y……鉄心、l1及びl2……巻
線、C……コンデンサ、T0……出力変圧器。
Figures 1 and 2 are block diagrams showing an example of the configuration of a filter circuit for improving the output waveform of a thyristor inverter. Figure 3 is a circuit diagram for explaining the imbalance in current sharing when inverter units are paralleled. FIG. 4 is a block diagram of a conventional large-capacity single-phase inverter, and FIG. 5 is a circuit diagram showing an embodiment of an output filter circuit of a single-phase inverter according to the present invention.
FIG. 6 is a schematic diagram of the structure of the reactor in the same embodiment. INV 1 ~ INV o ... Inverter unit, L 1 ~
L o ...reactor, Y...iron core, l1 and l2 ...winding, C...capacitor, T0 ...output transformer.
Claims (1)
と、これら単相インバータユニツト毎の交流出力
端と負荷との間に設けられ、同一鉄心に所要巻数
の巻線を2分割した形で、かつ互いに電流ベクト
ルを加える極性で巻装された二つの巻線を有する
リアクトルと、このリアクトルの2つの巻線を各
単相インバータユニツトの交流出力端と負荷との
電路に各々介挿するとともに、リアクトルと負荷
との間に並列接続された各単相インバータユニツ
ト共通のコンデンサとを備えたことを特徴とする
単相インバータの出力フイルタ回路。 It is provided between a plurality of parallel-connected single-phase inverter units, the AC output terminal of each of these single-phase inverter units, and the load, and has a winding of the required number of turns on the same core divided into two, and has a current vector that is different from each other. A reactor having two windings wound with a polarity that adds An output filter circuit for a single-phase inverter, comprising a common capacitor for each single-phase inverter unit connected in parallel between the output filter circuit and the single-phase inverter unit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1265983U JPS59119791U (en) | 1983-01-31 | 1983-01-31 | Single-phase inverter output filter circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1265983U JPS59119791U (en) | 1983-01-31 | 1983-01-31 | Single-phase inverter output filter circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59119791U JPS59119791U (en) | 1984-08-13 |
JPH0419994Y2 true JPH0419994Y2 (en) | 1992-05-07 |
Family
ID=30144057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1265983U Granted JPS59119791U (en) | 1983-01-31 | 1983-01-31 | Single-phase inverter output filter circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59119791U (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0793825B2 (en) * | 1986-08-21 | 1995-10-09 | 富士電機株式会社 | Inverter parallel connection circuit |
JPH07106066B2 (en) * | 1987-05-28 | 1995-11-13 | 富士電機株式会社 | Parallel connection circuit of single-phase inverter |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5227522A (en) * | 1975-08-26 | 1977-03-01 | Fuji Electric Co Ltd | Transistor inverter |
JPS5357428A (en) * | 1976-11-04 | 1978-05-24 | Toyo Electric Mfg Co Ltd | Method of suppressing cross current |
JPS5577375A (en) * | 1978-12-06 | 1980-06-11 | Hitachi Ltd | Current-type inverter |
-
1983
- 1983-01-31 JP JP1265983U patent/JPS59119791U/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5227522A (en) * | 1975-08-26 | 1977-03-01 | Fuji Electric Co Ltd | Transistor inverter |
JPS5357428A (en) * | 1976-11-04 | 1978-05-24 | Toyo Electric Mfg Co Ltd | Method of suppressing cross current |
JPS5577375A (en) * | 1978-12-06 | 1980-06-11 | Hitachi Ltd | Current-type inverter |
Also Published As
Publication number | Publication date |
---|---|
JPS59119791U (en) | 1984-08-13 |
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