JPH08251941A - Inverter producing three-phase four-wire output - Google Patents
Inverter producing three-phase four-wire outputInfo
- Publication number
- JPH08251941A JPH08251941A JP7045143A JP4514395A JPH08251941A JP H08251941 A JPH08251941 A JP H08251941A JP 7045143 A JP7045143 A JP 7045143A JP 4514395 A JP4514395 A JP 4514395A JP H08251941 A JPH08251941 A JP H08251941A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- output
- converter
- inverter
- voltage
- 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.)
- Pending
Links
Landscapes
- Inverter Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、例えば移動用野外電
源システムなどに使用される三相４線式出力を有するイ
ンバータ装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter device having a three-phase four-wire type output used in, for example, a mobile outdoor power supply system.
【０００２】[0002]
【従来の技術】図２は、この種の三相４線式出力を有す
るインバータ装置の従来例を示すブロック構成図であ
る。図２において、１は蓄電池などの直流電源、２は半
導体スイッチ素子を三相ブリッジ結線した構成などから
なるインバータ主回路とリアクトル，コンデンサなどか
ら構成される正弦化フィルタとからなる三相インバー
タ、３はデルタ・スター結線の出力変圧器、４は出力電
圧検出用の三相ＰＴ、５は三相整流器、６はインバータ
制御回路である。2. Description of the Related Art FIG. 2 is a block diagram showing a conventional example of an inverter device having a three-phase four-wire output of this type. In FIG. 2, reference numeral 1 is a DC power source such as a storage battery, 2 is a three-phase inverter including an inverter main circuit having a configuration in which semiconductor switching elements are connected in a three-phase bridge, and a sine filter including a reactor, a capacitor, and the like. Is an output transformer of a delta star connection, 4 is a three-phase PT for detecting an output voltage, 5 is a three-phase rectifier, and 6 is an inverter control circuit.
【０００３】インバータ制御回路６では、三相整流器５
の出力電圧を検出値として図示しない電圧設定値との偏
差を調節演算して、三相インバータ２の点弧パルスを出
力し、この点弧パルスにより三相インバータ２は、前記
電圧設定値に基づく三相交流電圧を出力する。デルタ・
スター結線の出力変圧器３の各相の出力Ｒ，Ｓ，Ｔと、
スター結線の中性点Ｎとにより三相４線式出力を有する
インバータ装置を構成している。In the inverter control circuit 6, the three-phase rectifier 5
Is used as a detection value to adjust the deviation from a voltage setting value (not shown) to output an ignition pulse of the three-phase inverter 2. The ignition pulse causes the three-phase inverter 2 to operate based on the voltage setting value. Outputs three-phase AC voltage. delta·
The output R, S, T of each phase of the output transformer 3 of the star connection,
The neutral point N of the star connection constitutes an inverter device having a three-phase four-wire output.
【０００４】[0004]
【発明が解決しようとする課題】上記従来の三相４線式
出力を有するインバータ装置によると、デルタ・スター
結線の出力変圧器は、インバータ装置の出力容量（ＫＶ
Ａ）に相当するＫＶＡの容量を必要とし、インバータ装
置が大型化し、重量も重くなり、例えば移動用野外電源
システムなどで要望される装置の軽量化にたいしては問
題となる場合があった。According to the above-described conventional inverter device having a three-phase four-wire output, the output transformer of the delta star connection has an output capacity (KV) of the inverter device.
The capacity of KVA corresponding to A) is required, the inverter device becomes large in size and heavy in weight, and this may be a problem for reducing the weight of the device required in, for example, a mobile outdoor power supply system.
【０００５】この発明の目的は、上記問題点を解決する
三相４線式出力を有するインバータ装置を提供すること
にある。An object of the present invention is to provide an inverter device having a three-phase, four-wire output that solves the above problems.
【０００６】[0006]
【課題を解決するための手段】この発明は、直流電源か
ら所望の直流電圧を絶縁して出力する第１の直流−直流
変換器および第２の直流−直流変換器のそれぞれの出力
電圧が加算されるように接続し、該加算した直流電圧を
三相の交流に変換する三相インバータを備え、第１の直
流−直流変換器の出力と第２の直流−直流変換器の出力
の中間接続点を三相の交流出力の中性点とし、三相イン
バータのそれぞれの出力と中性点との間の発生する電圧
の整流した平均値が所望の値になるように該三相インバ
ータを制御し、三相インバータのそれぞれの出力と中性
点との間の発生するそれぞれの電圧の瞬時値の和が零と
なるように、第１の直流−直流変換器と第２の直流−直
流変換器それぞれの出力電圧を補正するようにする。According to the present invention, respective output voltages of a first DC-DC converter and a second DC-DC converter that insulate and output a desired DC voltage from a DC power source are added. And a three-phase inverter for converting the added DC voltage into a three-phase AC, and an intermediate connection between the output of the first DC-DC converter and the output of the second DC-DC converter. The point is the neutral point of the three-phase AC output, and the three-phase inverter is controlled so that the rectified average value of the voltage generated between each output of the three-phase inverter and the neutral point becomes a desired value. Then, the first DC-DC converter and the second DC-DC converter are arranged so that the sum of the instantaneous values of the respective voltages generated between the respective outputs of the three-phase inverter and the neutral point becomes zero. Correct the output voltage of each unit.
【０００７】[0007]
【作用】この発明によれば、直流電源を２つの直流−直
流変換器により中間接続点を持った直流電圧に変換し、
この中間接続点を三相４線式出力の中性点とすることに
より出力変圧器が不要となる。According to the present invention, the DC power supply is converted into the DC voltage having the intermediate connection point by the two DC-DC converters,
By making this intermediate connection point the neutral point of the three-phase four-wire output, an output transformer is not required.
【０００８】[0008]
【実施例】図１は、この発明の実施例を示す三相４線式
出力を有するインバータ装置のブロック構成図である。
図１において、直流−直流変換器１０は、半導体スイッ
チ素子などからなる単相高周波インバータ１０ａと高周
波変圧器１０ｂと整流回路１０ｃとから構成され、直流
−直流変換器１１も直流−直流変換器１０と同様の構成
である。1 is a block diagram of an inverter device having a three-phase, four-wire output according to an embodiment of the present invention.
In FIG. 1, the DC-DC converter 10 is composed of a single-phase high-frequency inverter 10a including a semiconductor switch element, a high-frequency transformer 10b, and a rectifier circuit 10c. The DC-DC converter 11 and the DC-DC converter 10 It has the same configuration as.
【０００９】直流−直流変換器１０と直流−直流変換器
１１の出力を直列に接続し、この両端の直流電圧を三相
インバータ２に入力して三相の交流電圧を出力し、これ
をＲ，Ｓ，Ｔ端子とし、直流−直流変換器１０の出力と
直流−直流変換器１１の出力の中間接続点は中性点Ｎ端
子としている。電圧検出用ＰＴ４ａ，４ｂ，４ｃの二次
側電圧は三相整流器５を介してインバータ制御回路６の
検出値として図示しない電圧設定値との偏差を調節演算
して、三相インバータ２の点弧パルスを出力し、この点
弧パルスにより三相インバータ２は、前記電圧設定値に
基づく三相交流電圧を出力する。The outputs of the DC / DC converter 10 and the DC / DC converter 11 are connected in series, and the DC voltage at both ends is input to the three-phase inverter 2 to output a three-phase AC voltage. , S, T terminals, and the intermediate connection point between the output of the DC / DC converter 10 and the output of the DC / DC converter 11 is the neutral point N terminal. The secondary side voltage of the voltage detecting PTs 4a, 4b, 4c is adjusted as a detection value of the inverter control circuit 6 through the three-phase rectifier 5 to adjust the deviation from a voltage setting value (not shown), and the three-phase inverter 2 is ignited. A pulse is output, and the three-phase inverter 2 outputs a three-phase AC voltage based on the voltage setting value by the ignition pulse.
【００１０】さらに、電圧検出用ＰＴ４ａ，４ｂ，４ｃ
の二次側電圧は加算演算器１２に入力され、それぞれの
瞬時値の和、すなわち相間アンバランス分が求められ、
この相間アンバランス分は補正演算回路１３で直流電圧
の補正値として演算される。直流−直流変換器１０と直
流−直流変換器１１の出力の和の電圧を制御する直流電
圧制御回路１４の出力を加算演算器１５，１６で前記補
正値との加減算を行い、加算演算器１５，１６の出力は
それぞれベース制御回路１７，１８で単相高周波インバ
ータ１０ａ，１１ｂをベース信号のパルス幅を制御す
る。Further, voltage detection PTs 4a, 4b, 4c
The secondary voltage of is input to the addition calculator 12, and the sum of the respective instantaneous values, that is, the amount of unbalance between phases is calculated,
This phase-to-phase imbalance is calculated as a DC voltage correction value by the correction calculation circuit 13. The output of the DC voltage control circuit 14 for controlling the voltage of the sum of the outputs of the DC / DC converter 10 and the DC / DC converter 11 is added / subtracted to / from the correction value by the addition calculators 15 and 16, and the addition calculator 15 is added. , 16 outputs the pulse width of the base signal to the single-phase high-frequency inverters 10a, 11b by the base control circuits 17, 18, respectively.
【００１１】上述の動作により、このインバータ装置
は、前記相間アンバランス分が補正された三相４線式の
交流電圧を出力する。By the operation described above, this inverter device outputs a three-phase four-wire type AC voltage in which the interphase imbalance is corrected.
【００１２】[0012]
【発明の効果】この発明によれば、例えばインバータ装
置の出力容量を５０ＫＶＡの場合、従来はデルタ・スタ
ー結線の出力変圧器（５０ＫＶＡ）が０．１ｍ3 ，２０
０Ｋｇあったものが、直流−直流変換器（０．０３
ｍ3 ，４０Ｋｇ）を２組備えるだけでよく、差引０．０
４ｍ3 ，１２０ｇの小型，軽量化が実現した。According to the present invention, for example, when the output capacity of the inverter device is 50 KVA, the output transformer (50 KVA) of the delta star connection is conventionally 0.1 m 3 , 20.
What was 0 Kg, the DC-DC converter (0.03
m 3 , 40 Kg), only two sets are required, and the difference is 0.0
4m 3 , 120g compact and lightweight.
【００１３】また、三相出力の相間アンバランスも補正
可能となり、例えば移動用野外電源システムなどに好適
である。Further, the interphase imbalance of the three-phase output can be corrected, which is suitable for, for example, a mobile outdoor power supply system.
【図１】この発明の実施例を示す三相４線式出力を有す
るインバータ装置のブロック構成図FIG. 1 is a block configuration diagram of an inverter device having a three-phase four-wire output showing an embodiment of the present invention.
【図２】従来例を示す三相４線式出力を有するインバー
タ装置のブロック構成図FIG. 2 is a block configuration diagram of an inverter device having a three-phase four-wire output showing a conventional example.
１ 直流電源 ２ 三相インバータ ３ 出力変圧器 ４ 三相ＰＴ ４ａ〜４ｃ 電圧検出用ＰＴ ５ 三相整流器 ６ インバータ制御回路 １０，１１ 直流−直流変換器 １０ａ，１１ａ 単相高周波インバータ １０ｂ，１１ｂ 高周波変圧器 １０ｃ，１１ｃ 整流回路 １２ 加算演算器 １３ 補正演算回路 １４ 直流電圧制御回路 １５，１６ 加算演算器 １７，１８ ベース制御回路 DESCRIPTION OF SYMBOLS 1 DC power supply 2 3 phase inverter 3 Output transformer 4 3 phase PT 4a-4c PT 5 3 phase rectifier 6 for voltage detection 6 Inverter control circuit 10,11 DC-DC converter 10a, 11a Single phase high frequency inverter 10b, 11b High frequency transformer 10c, 11c Rectifier circuit 12 Addition calculator 13 Correction calculation circuit 14 DC voltage control circuit 15, 16 Addition calculator 17, 18 Base control circuit
Claims (1)
力する第１の直流−直流変換器および第２の直流−直流
変換器のそれぞれの出力電圧が加算されるように接続
し、 該加算した直流電圧を三相の交流に変換する三相インバ
ータを備え、 第１の直流−直流変換器の出力と第２の直流−直流変換
器の出力の中間接続点を三相の交流出力の中性点とし、 三相インバータのそれぞれの出力と中性点との間の発生
する電圧の整流した平均値が所望の値になるように該三
相インバータを制御し、 三相インバータのそれぞれの出力と中性点との間の発生
するそれぞれの電圧の瞬時値の和が零となるように、第
１の直流−直流変換器と第２の直流−直流変換器それぞ
れの出力電圧を補正することを特徴とする三相４線式出
力を有するインバータ装置。1. A first DC-DC converter and a second DC-DC converter which insulate and output a desired DC voltage from a DC power supply, and are connected so that respective output voltages of the first DC-DC converter and the second DC-DC converter are added together. A three-phase inverter for converting the added DC voltage into a three-phase AC is provided, and an intermediate connection point between the output of the first DC-DC converter and the output of the second DC-DC converter is a three-phase AC output. The neutral point is controlled, and the three-phase inverter is controlled so that the rectified average value of the voltage generated between each output of the three-phase inverter and the neutral point becomes a desired value. The output voltage of each of the first DC-DC converter and the second DC-DC converter is corrected so that the sum of the instantaneous values of the voltages generated between the output and the neutral point becomes zero. An inverter device having a three-phase, four-wire output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7045143A JPH08251941A (en) | 1995-03-06 | 1995-03-06 | Inverter producing three-phase four-wire output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7045143A JPH08251941A (en) | 1995-03-06 | 1995-03-06 | Inverter producing three-phase four-wire output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08251941A true JPH08251941A (en) | 1996-09-27 |
Family
ID=12711063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7045143A Pending JPH08251941A (en) | 1995-03-06 | 1995-03-06 | Inverter producing three-phase four-wire output |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08251941A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8093746B2 (en) | 2009-12-16 | 2012-01-10 | General Electric Company | Control of four-leg transformerless uninterruptible power supply |
| US8716881B2 (en) | 2011-04-25 | 2014-05-06 | Yamabiko Corporation | Three phase inverter type generator |
| JP2017022827A (en) * | 2015-07-08 | 2017-01-26 | 東洋電機製造株式会社 | Auxiliary power unit |
-
1995
- 1995-03-06 JP JP7045143A patent/JPH08251941A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8093746B2 (en) | 2009-12-16 | 2012-01-10 | General Electric Company | Control of four-leg transformerless uninterruptible power supply |
| US8716881B2 (en) | 2011-04-25 | 2014-05-06 | Yamabiko Corporation | Three phase inverter type generator |
| JP2017022827A (en) * | 2015-07-08 | 2017-01-26 | 東洋電機製造株式会社 | Auxiliary power unit |
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