JPH1154346A - Transformer for multiplexing inverter - Google Patents
Transformer for multiplexing inverterInfo
- Publication number
- JPH1154346A JPH1154346A JP9212165A JP21216597A JPH1154346A JP H1154346 A JPH1154346 A JP H1154346A JP 9212165 A JP9212165 A JP 9212165A JP 21216597 A JP21216597 A JP 21216597A JP H1154346 A JPH1154346 A JP H1154346A
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- Prior art keywords
- yoke
- inverter
- core
- leg
- transformer
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はインバータ式ＳＶＣ
（無効電力補償装置）、分散電源の系統連系用インバー
タ、ＣＶＣＦ（定電圧定周波数）装置等のインバータ応
用装置に適用されるインバータ多重化用変圧器に関す
る。The present invention relates to an inverter type SVC.
The present invention relates to an inverter multiplexing transformer applied to an inverter application device such as a (reactive power compensating device), a system interconnection inverter of a distributed power source, and a CVCF (constant voltage / constant frequency) device.
【０００２】[0002]
【従来の技術】複数のインバータの出力側を変圧器で直
列接続して多重化することで、インバータ応用装置の高
調波低減や装置容量の増大化が図られている。例えば、
矩形波電圧を出力する三相電圧形インバータ２台を変圧
器で直列接続して２多重化する場合は、図３及び図４に
示すような２台の独立した第１変圧器１１と第２変圧器
１２を使用している。2. Description of the Related Art The output side of a plurality of inverters is connected in series by a transformer and multiplexed to reduce harmonics and increase the capacity of an inverter application device. For example,
In the case where two three-phase voltage type inverters that output a rectangular wave voltage are connected in series by a transformer and are multiplexed, two independent first transformers 11 and a second transformer as shown in FIGS. A transformer 12 is used.
【０００３】図３は、矩形波電圧を出力する２台の同一
定格の三相電圧形第１インバータ１と第２インバータ２
を２多重化したときの回路図で、第１インバータ１の三
相出力（ｕ' 、ｖ' 、ｗ' ）側を三相三脚形第１変圧器
１１の１次側に接続し、第２インバータ２の三相出力
（ｕ、ｖ、ｗ）側を三相三脚形第２変圧器１２の１次側
に接続して、両変圧器１１、１２の２次側を直列接続す
ることで２多重化が行われる。同回路の場合、第１イン
バータ１と第２インバータ２は、基本周波数で３０゜位
相のずれた矩形波電圧を出力する。また、例えば第１変
圧器１１は１次側をデルタ結線とし、２次側を１次側に
対して３０゜位相の進んだ千鳥結線とした変圧器であ
り、第２変圧器１２は１次側をデルタ結線、２次側をオ
ープンスター結線とした変圧器である。FIG. 3 shows two three-phase voltage type first inverters 1 and second inverters 2 of the same rating which output a rectangular wave voltage.
Is a circuit diagram in which the three-phase outputs (u ′, v ′, w ′) of the first inverter 1 are connected to the primary side of the three-phase tripod-type first transformer 11, and the second The three-phase output (u, v, w) side of the inverter 2 is connected to the primary side of the three-phase tripod-type second transformer 12, and the secondary sides of both transformers 11, 12 are connected in series. Multiplexing is performed. In the case of this circuit, the first inverter 1 and the second inverter 2 output a rectangular wave voltage having a fundamental frequency shifted by 30 °. Further, for example, the first transformer 11 is a transformer having a delta connection on the primary side and a staggered connection having a secondary side advanced by 30 ° with respect to the primary side, and the second transformer 12 is a primary connection. This transformer has a delta connection on the side and an open star connection on the secondary side.
【０００４】図３の第１変圧器１１と第２変圧器１２
は、図４に示すような夫々に独立した三相三脚形の第１
コア２１と第２コア２２を備える。第１コア２１は上下
一対の継鉄部２１ａ、２１ｂとこの一対を連結する３本
の脚部２３、…で構成され、各脚部２３、…に第１イン
バータ１の三相出力（ｕ' 、ｖ' 、ｗ' ）側の１次巻線
８' 、…と図３に示す２次巻線９' 、…が巻回される。
第２コア２２は上下一対の継鉄部２２ａ、２２ｂとこの
一対を連結する３本の脚部２４、…で構成され、各脚部
２４、…に第２インバータ２の三相出力（ｕ、ｖ、ｗ）
側の１次巻線８、…と２次巻線９、…が巻回される。The first transformer 11 and the second transformer 12 shown in FIG.
Is the first of three independent three-phase tripods as shown in FIG.
A core 21 and a second core 22 are provided. The first core 21 includes a pair of upper and lower yoke portions 21a, 21b and three legs 23,... Connecting the pair, and the three-phase output (u ′) of the first inverter 1 is applied to each leg 23,. , V ′, w ′) side and the secondary windings 9 ′,... Shown in FIG.
The second core 22 includes a pair of upper and lower yoke portions 22a, 22b and three legs 24,... Connecting the pair, and the three-phase outputs (u, v, w)
, And the secondary windings 9,... Are wound.
【０００５】[0005]
【発明が解決しようとする課題】上記のような２台の三
相電圧形インバータの出力側を２台の三相三脚形変圧器
で２多重化することは、各種技術文献にも掲載された公
知のことであり、多重化機能に問題は無いが、２台の独
立した変圧器が大型で重く、これがインバータ式ＳＶＣ
等のインバータ応用装置の小型軽量化、設備費の低減化
を難しくしている。 本発明の目的とするところは、複
数のインバータ出力を２多重化する変圧器を小型軽量化
することにある。The multiplexing of the output side of the two three-phase voltage type inverters with two three-phase tripod transformers as described above has been described in various technical documents. It is well known that there is no problem with the multiplexing function, but the two independent transformers are large and heavy,
It is difficult to reduce the size and weight of inverter-applied devices and to reduce equipment costs. It is an object of the present invention to reduce the size and weight of a transformer for multiplexing a plurality of inverter outputs.
【０００６】[0006]
【課題を解決するための手段】本発明は、基本周波数で
３０゜位相のずれた矩形波電圧を出力する２台の三相電
圧形の第１インバータと第２インバータの夫々の三相出
力側が１次側に接続され、２次側を直列に接続すること
により２台のインバータ出力を２多重化するインバータ
多重化用変圧器であって、変圧器用コアが、平行な一対
の第１継鉄部及び第２継鉄部と、この第１、第２継鉄部
の中間に位置する共通継鉄部と、第１継鉄部と共通継鉄
部を連結する３脚構造の第１脚部と、第２継鉄部と共通
継鉄部を連結する３脚構造の第２脚部とで構成され、こ
のコアの第１脚部の１次側に第１インバータの三相出力
側を接続し、第２脚部の１次側に第２インバータの三相
出力側を接続して、第１脚部と第２脚部の２次側を直列
に接続することで２台のインバータ出力を２多重化し、
共通継鉄部のコアの断面積を第１継鉄部又は第２継鉄部
の断面積の約半分の断面積に設定したことにより、上記
目的を達成するものである。SUMMARY OF THE INVENTION According to the present invention, two three-phase voltage-type first and second inverters each outputting a rectangular wave voltage having a fundamental frequency shifted by 30.degree. An inverter multiplexing transformer connected to the primary side and multiplexing two inverter outputs by connecting the secondary side in series, wherein the transformer core is a pair of parallel first yoke. Part, a second yoke part, a common yoke part located between the first and second yoke parts, and a first leg part of a three-leg structure connecting the first yoke part and the common yoke part. And a second leg portion of a three-leg structure connecting the second yoke portion and the common yoke portion. The three-phase output side of the first inverter is connected to the primary side of the first leg portion of the core. Then, the three-phase output side of the second inverter is connected to the primary side of the second leg, and the secondary side of the first leg and the second leg is connected in series. Pedestal inverter outputs 2 multiplexing,
The above object is achieved by setting the cross-sectional area of the core of the common yoke to about half the cross-sectional area of the first yoke or the second yoke.
【０００７】また、本発明変圧器においては、上記コア
の第１脚部と第２脚部の少なくとも一方の１次側に３台
の単相インバータの出力側を接続するようにしてもよ
い。In the transformer of the present invention, the output sides of three single-phase inverters may be connected to at least one primary side of the first leg and the second leg of the core.
【０００８】ここで、２台のインバータ出力を２多重化
する単品の変圧器のコアの共通継鉄部は、従来の２台の
三相三脚形変圧器の２台のコアの各一方の継鉄部を共通
化して、断面積を半減させたものに相当する。即ち、本
発明における変圧器のコアの第１脚部とこれに連結され
る第１継鉄部と共通継鉄部で従来の１台の三相三脚形コ
アが構成され、第２脚部とこれに連結される第２継鉄部
と共通継鉄部で従来の別の１台の三相三脚形コアが構成
され、共通継鉄部で２台の変圧器用コアの各一方の継鉄
部を共通化することで、共通継鉄部に流れる磁束が第
１、第２継鉄部に流れる磁束の約半分になって、共通継
鉄部の断面積を第１、第２継鉄部のいずれかの約半分に
設定する。Here, the common yoke of the core of the single transformer for multiplexing the outputs of the two inverters into two is formed by connecting one of the two cores of two conventional three-phase tripod transformers. This is equivalent to the one with a common iron part and half the cross-sectional area. In other words, the first leg of the transformer core according to the present invention, the first yoke connected thereto and the common yoke constitute a conventional three-phase tripod core, and the second leg and Another conventional three-phase tripod-shaped core is constituted by the second yoke section and the common yoke section connected thereto, and each common yoke section forms one of the two yoke sections of the transformer cores. , The magnetic flux flowing through the common yoke becomes approximately half of the magnetic flux flowing through the first and second yoke, and the cross-sectional area of the common yoke is reduced by the first and second yoke. Set about half of either.
【０００９】[0009]
【発明の実施の形態】図１（Ａ）は、図３と同様な２台
の第１インバータ１と第２インバータ２を２多重化する
実施例の回路図で、図３回路との相違点は第１インバー
タ１と第２インバータ２の出力側を１台の本発明の三相
三脚形変圧器３で２多重化したことである。１台の変圧
器３は、図１（Ｂ）に示すような１台のコア４を備え
る。コア４は、平行な一対の第１継鉄部５ａ及び第２継
鉄部５ｂと、この第１、第２継鉄部５ａ、５ｂの中間に
位置して断面積が第１、第２継鉄部５ａ、５ｂの約半分
である共通継鉄部５ｃと、第１継鉄部５ａと共通継鉄部
５ｃを連結する３脚構造の第１脚部６と、第２継鉄部５
ｂと共通継鉄部５ｃを連結する３脚構造の第２脚部７で
構成される。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A is a circuit diagram of an embodiment in which two first inverters 1 and two inverters 2 are multiplexed in the same manner as in FIG. 3, which is different from the circuit in FIG. Means that the output sides of the first inverter 1 and the second inverter 2 are multiplexed by one three-phase tripod transformer 3 of the present invention. One transformer 3 includes one core 4 as shown in FIG. The core 4 is located between the pair of parallel first and second yoke portions 5a and 5b, and between the first and second yoke portions 5a and 5b. A common yoke portion 5c which is approximately half of the iron portions 5a and 5b, a first leg portion 6 having a three-leg structure connecting the first yoke portion 5a and the common yoke portion 5c, and a second yoke portion 5
b and a second leg 7 having a three-leg structure connecting the common yoke 5c.
【００１０】コア４の第１脚部６の１次側に第１インバ
ータ１の三相出力（ｕ' 、ｖ' 、ｗ' ）側が接続され、
コア４の第２脚部７の１次側に第２インバータ２の三相
出力（ｕ、ｖ、ｗ）側が接続され、第１脚部６と第２脚
部７の２次側を直列接続することで２台のインバータ
１、２の２多重化が行われる。The three-phase output (u ', v', w ') side of the first inverter 1 is connected to the primary side of the first leg 6 of the core 4,
The three-phase output (u, v, w) side of the second inverter 2 is connected to the primary side of the second leg 7 of the core 4, and the first leg 6 and the secondary side of the second leg 7 are connected in series. By doing so, the two inverters 1 and 2 are multiplexed.
【００１１】１台のコア４は、図４の２台の変圧器の第
１コア２１と第２コア２２を上下に重ねて一体化したも
のに相当する。即ち、１台のコア４の各継鉄部５ａ、５
ｂ、５ｃが上中下段で並ぶ場合、下段の第１継鉄部５ａ
と共通継鉄部５ｃと第１脚部６で構成されるコア下半分
が図４の第１コア２１に相当する機能を持ち、コア４の
上段の第２継鉄部５ｂと共通継鉄部５ｃと第２脚部７で
構成されるコア上半分が図４の第２コア２２に相当する
機能を持つ。また、コア４の共通継鉄部５ｃが、図４の
第１コア２１の上段の継鉄部２１ｂと第２コア２２の下
段の継鉄部２２ａを共通化させてその断面積を半減させ
たものに相当する。One core 4 corresponds to a unit in which the first core 21 and the second core 22 of the two transformers shown in FIG. That is, each yoke portion 5a, 5
In the case where b and 5c are arranged in the upper, middle, and lower stages, the first yoke portion 5a in the lower stage
The lower half of the core constituted by the common yoke portion 5c and the first leg portion 6 has a function corresponding to the first core 21 in FIG. 4, and the second yoke portion 5b at the upper stage of the core 4 and the common yoke portion The upper half of the core constituted by 5c and the second leg 7 has a function corresponding to the second core 22 in FIG. Further, the common yoke portion 5c of the core 4 shares the upper yoke portion 21b of the first core 21 and the lower yoke portion 22a of the second core 22 in FIG. 4 to reduce the cross-sectional area by half. Equivalent to something.
【００１２】即ち、図１（Ｂ）の部分引き出し断面図に
示すように、コア４の共通継鉄部５ｃの断面積をＳ' と
し、第１継鉄部５ａと第２継鉄部５ｂの断面積が例えば
同一としてこの断面積をＳとすると、共通継鉄部５ｃの
断面積Ｓ' を各継鉄部５ａ、５ｂの断面積Ｓの約半分に
設定する。その理由を図４の第１コア２１と第２コア２
２を参照して説明する。That is, as shown in the partial drawing cross-sectional view of FIG. 1B, the cross-sectional area of the common yoke portion 5c of the core 4 is S ′, and the cross-sectional area of the first yoke portion 5a and the second yoke portion 5b is Assuming that the cross-sectional area is the same, for example, and this cross-sectional area is S, the cross-sectional area S ′ of the common yoke portion 5c is set to about half of the cross-sectional area S of each of the yoke portions 5a and 5b. The reason is that the first core 21 and the second core 2 in FIG.
This will be described with reference to FIG.
【００１３】図４における上部位置の第２コア２２の下
段継鉄部２２ａには、ｕ相１次巻線８による磁束Φｕ
と、ｖ相１次巻線８による磁束Φｖの１／２と、ｗ相１
次巻線８による磁束Φｗの１／２とが重なって流れるの
で、下段継鉄部２２ａに流れる磁束Φｐは、 Φｐ＝Φｕ−（Φｖ／２）−（Φｗ／２） である。ここで、三相平衡しているので、 Φｕ＋Φｖ＋Φｗ＝０ が成立する。従って、第２コア２２の下段継鉄部２２ａ
に流れる磁束Φｐは、 Φｐ＝Φｕ−（Φｖ＋Φｗ）／２＝Φｕ（３／２） となり、ｕ相１次巻線８のつくる磁束Φｕの３／２倍と
なる。The lower yoke portion 22a of the second core 22 at the upper position in FIG.
１ ／ of the magnetic flux Φv by the v-phase primary winding 8 and w-phase 1
Since 磁 束 of the magnetic flux Φw by the secondary winding 8 overlaps and flows, the magnetic flux Φp flowing through the lower yoke portion 22a is Φp = Φu− (Φv / 2) − (Φw / 2). Here, since three-phase equilibrium is established, Φu + Φv + Φw = 0 holds. Therefore, the lower yoke portion 22a of the second core 22
Φp = Φu− (Φv + Φw) / 2 = Φu (3/2), which is 3/2 times the magnetic flux Φu generated by the u-phase primary winding 8.
【００１４】また、図４における下部位置の第１コア２
１の上段継鉄部２１ｂに流れる磁束Φｑも、上記同様の
計算でｕ相１次巻線８のつくる磁束の３／２倍となる。
この第１コア２１の上段継鉄部２１ｂに流れる磁束Φｑ
の向きは、第２コア２２の下段継鉄部２２ａに流れる磁
束Φｐの向きと逆であり、かつ、位相が３０゜ずれてい
る。この位相ずれは、多重化のために第１インバータ１
の出力電圧が第２インバータ２の出力電圧に対して３０
゜位相遅れとなるように設定されているためである。The first core 2 at the lower position in FIG.
The magnetic flux Φq flowing through the upper yoke portion 21b of the 1st is also ／ times the magnetic flux generated by the u-phase primary winding 8 by the same calculation as described above.
The magnetic flux Φq flowing through the upper yoke portion 21b of the first core 21
Is opposite to the direction of the magnetic flux Φp flowing through the lower yoke portion 22a of the second core 22, and the phase is shifted by 30 °. This phase shift is caused by the first inverter 1
Output voltage of the second inverter 2 is 30
た め This is because the phase is set to be delayed.
【００１５】そこで、図４の第１コア２１の上段継鉄部
２１ｂの真上に第２コア２２の下段継鉄部２２ａを重ね
て共通化すると、上段継鉄部２１ｂと下段継鉄部２２ａ
の共通化部分に流れる磁束Φｃは、 Φｃ＝Φｐ−Φｑ≒３Φｕ／４＝Φｐ／２ となり、共通化前の磁束Φｐの約半分となる。かかる図
４の各コア２１、２２を上下に重ねたときの上段継鉄部
２１ｂと下段継鉄部２２ａの共通化部分は、図１（Ｂ）
のコア４の共通継鉄部５ｃに相当する。Therefore, when the lower yoke portion 22a of the second core 22 is superimposed and shared just above the upper yoke portion 21b of the first core 21 in FIG. 4, the upper yoke portion 21b and the lower yoke portion 22a
The magnetic flux Φc flowing in the common portion of Φc is Φc = Φp−Φq ≒ 3Φu / 4 = Φp / 2, which is about half of the magnetic flux Φp before the common. The upper yoke portion 21b and the lower yoke portion 22a when the cores 21 and 22 of FIG. 4 are vertically stacked are shown in FIG.
Corresponds to the common yoke portion 5c of the core 4.
【００１６】従って、コア４の共通継鉄部５ｃに流れる
磁束Φｃが半減化されることによって、共通継鉄部５ｃ
の断面積Ｓ' を上下段の継鉄部５ａ、５ｂの断面積Ｓの
約半分に設定することができる。また、コア４は３つの
継鉄部５ａ、５ｂ、５ｃを持つ構造ゆえに、コア４の継
鉄部全体積は、 継鉄部断面積Ｓ×継鉄部長さＬ×２箇所＋共通継鉄部断
面積Ｓ' ×Ｌ＝２．５ＳＬ となる。他方、図４の２台の第１コア２１と第２コア２
２の全体の継鉄部全体積は、継鉄部断面積Ｓ×継鉄部長
さＬ×４箇所＝４ＳＬである。従って、図１の変圧器３
のコア４の体積と重量が、図４の従来の２台のコア２
１、２２の合計体積と重量より少なくとも４ＳＬ−２．
５ＳＬ＝１．５ＳＬに相当する分だけ低減化されて、２
多重化のための変圧器の小型軽量化、低コスト化が実現
される。Accordingly, the magnetic flux Φc flowing through the common yoke portion 5c of the core 4 is reduced by half, so that the common yoke portion 5c
Can be set to about half of the cross-sectional area S of the upper and lower yoke portions 5a and 5b. Further, since the core 4 has a structure having three yoke portions 5a, 5b, and 5c, the entire volume of the yoke portion of the core 4 is: yoke section cross-sectional area S × yoke portion length L × 2 places + common yoke portion The sectional area S ′ × L = 2.5SL. On the other hand, two first cores 21 and second cores 2 shown in FIG.
The overall volume of the entire yoke portion of No. 2 is the yoke cross-sectional area S × the length of the yoke portion L × 4 places = 4SL. Therefore, the transformer 3 of FIG.
The volume and the weight of the core 4 of the conventional two cores 2 of FIG.
At least 4SL than the total volume and weight of 1, 22;
It is reduced by an amount corresponding to 5SL = 1.5SL, and 2
Transformers for multiplexing can be reduced in size and weight and cost can be reduced.
【００１７】以上の実施例は、三相電圧形インバータ２
台の２多重化回路に適用した変圧器であるが、本発明は
この実施例に限らず、三相電圧形インバータ１台の代わ
りに単相インバータ３台を使用したインバータ多重化用
変圧器であってもよく、その実施例を図２に示す。In the above embodiment, the three-phase voltage source inverter 2
Although the present invention is not limited to this embodiment, the present invention is not limited to this embodiment, but is applied to an inverter multiplexing transformer using three single-phase inverters instead of one three-phase voltage type inverter. FIG. 2 shows an embodiment thereof.
【００１８】図２は、３台の独立した単相インバータ１
０' 、…と別の３台の独立した単相インバータ１０、…
の出力側を１台の上記変圧器４を使用した２多重化回路
である。各３台ずつの単相インバータ１０' 、…及び１
０、…が変圧器４の１次側に例えばオープンデルタ結線
される。３台の単相インバータ１０' 、…が図１の第１
インバータ１と同様な出力をし、別の３台の単相インバ
ータ１０、…が図１の第２インバータ２と同様な出力を
して、１台の変圧器４で２多重化される。FIG. 2 shows three independent single-phase inverters 1
0 ', ... and three other independent single-phase inverters 10, ...
Is a two-multiplexing circuit using one transformer 4 on the output side. Three single-phase inverters 10 ′,.
Are connected to the primary side of the transformer 4, for example, in an open delta connection. The three single-phase inverters 10 ',.
The other three single-phase inverters 10,... Output the same output as the inverter 1, and output the same as the second inverter 2 in FIG.
【００１９】[0019]
【発明の効果】本発明によれば、複数のインバータを２
多重化する変圧器が１台で済み、かつ、この単品の変圧
器のコアの共通継鉄部の断面積が他の継鉄部の断面積の
約半分に設定したので、インバータ多重化用変圧器の小
型軽量化、低コスト化が可能となり、この変圧器を使用
したインバータ応用装置の小型軽量化と低コスト化、設
置スペースの縮小化が図れる。According to the present invention, a plurality of inverters are
Only one transformer is required for multiplexing, and the cross-sectional area of the common yoke of the core of this single transformer is set to approximately half the cross-sectional area of the other yoke. This makes it possible to reduce the size and weight of the transformer and reduce the cost, and to reduce the size and weight of the inverter application device using the transformer, reduce the cost, and reduce the installation space.
【図１】図１（Ａ）は本発明の一実施例を説明するため
の三相インバータ多重化回路図、図１（Ｂ）は図１
（Ａ）で使用される変圧器の部分引き出し断面を含むコ
ア正面図FIG. 1A is a diagram of a three-phase inverter multiplexing circuit for explaining an embodiment of the present invention, and FIG.
Core front view including a partial drawing cross section of the transformer used in (A)
【図２】本発明の他の実施例を説明するための単相イン
バータ多重化回路図FIG. 2 is a diagram of a single-phase inverter multiplex circuit for explaining another embodiment of the present invention;
【図３】２台のインバータの従来変圧器を使用した２多
重化回路図FIG. 3 is a diagram of a two-multiplexed circuit using a conventional transformer of two inverters.
【図４】図３の２台の変圧器のコア正面図FIG. 4 is a front view of the core of the two transformers of FIG. 3;
１ 第１インバータ ２ 第２インバータ ３ 変圧器 ４ コア ５ａ 第１継鉄部 ５ｂ 第２継鉄部 ５ｃ 共通継鉄部 ６ 第１脚部 ７ 第２脚部 １０ 単相インバータ １０' 単相インバータ DESCRIPTION OF SYMBOLS 1 1st inverter 2 2nd inverter 3 Transformer 4 Core 5a 1st yoke part 5b 2nd yoke part 5c Common yoke part 6 1st leg part 7 2nd leg part 10 Single phase inverter 10 'Single phase inverter
Claims (2)
電圧を出力する２台の三相電圧形の第１インバータと第
２インバータの夫々の三相出力側が１次側に接続され、
２次側を直列に接続することにより２台のインバータ出
力を２多重化するインバータ多重化用変圧器であって、 変圧器用コアが、平行な一対の第１継鉄部及び第２継鉄
部と、この第１、第２継鉄部の中間に位置する共通継鉄
部と、第１継鉄部と共通継鉄部を連結する３脚構造の第
１脚部と、第２継鉄部と共通継鉄部を連結する３脚構造
の第２脚部とで構成され、このコアの第１脚部の１次側
に第１インバータの三相出力側を接続し、第２脚部の１
次側に第２インバータの三相出力側を接続して、第１脚
部と第２脚部の２次側を直列に接続することで２台のイ
ンバータ出力を２多重化し、共通継鉄部のコアの断面積
を第１継鉄部又は第２継鉄部の断面積の約半分の断面積
に設定したことを特徴とするインバータ多重化用変圧
器。1. A three-phase voltage-type first inverter and a second inverter, each of which outputs a rectangular wave voltage having a phase shift of 30 ° at a fundamental frequency, are connected to a primary side, respectively.
What is claimed is: 1. An inverter multiplexing transformer for multiplexing two inverter outputs by connecting the secondary side in series, wherein the transformer core comprises a pair of parallel first and second yoke portions. A common yoke located between the first and second yoke parts, a first leg of a three-leg structure connecting the first yoke part and the common yoke part, and a second yoke part And a second leg of a three-leg structure for connecting the common yoke. The three-phase output of the first inverter is connected to the primary side of the first leg of the core. 1
By connecting the three-phase output side of the second inverter to the secondary side and connecting the secondary sides of the first leg and the second leg in series, the output of the two inverters is multiplexed into two, and a common yoke section Wherein the cross-sectional area of the core is set to about half the cross-sectional area of the first yoke portion or the second yoke portion.
とも一方の１次側に３台の単相インバータの出力側を接
続するようにしたことを特徴とする請求項１記載のイン
バータ多重化用変圧器。2. An output side of three single-phase inverters is connected to a primary side of at least one of a first leg and a second leg of the core. Inverter multiplexing transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9212165A JPH1154346A (en) | 1997-08-06 | 1997-08-06 | Transformer for multiplexing inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9212165A JPH1154346A (en) | 1997-08-06 | 1997-08-06 | Transformer for multiplexing inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1154346A true JPH1154346A (en) | 1999-02-26 |
Family
ID=16617987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9212165A Pending JPH1154346A (en) | 1997-08-06 | 1997-08-06 | Transformer for multiplexing inverter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1154346A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005033883A (en) * | 2003-07-09 | 2005-02-03 | Toshiba Corp | Power converter |
-
1997
- 1997-08-06 JP JP9212165A patent/JPH1154346A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005033883A (en) * | 2003-07-09 | 2005-02-03 | Toshiba Corp | Power converter |
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