JPS6039374A - Output waveform improving method of inverter - Google Patents
Output waveform improving method of inverterInfo
- Publication number
- JPS6039374A JPS6039374A JP58147822A JP14782283A JPS6039374A JP S6039374 A JPS6039374 A JP S6039374A JP 58147822 A JP58147822 A JP 58147822A JP 14782283 A JP14782283 A JP 14782283A JP S6039374 A JPS6039374 A JP S6039374A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- output
- voltage
- harmonic
- output 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
Abstract
Description
【発明の詳細な説明】
この発明はインバータの出力に非線形負荷が接続された
場合等におけるインバータの出力波形改善方法に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for improving the output waveform of an inverter when a nonlinear load is connected to the output of the inverter.
第１図は従来例を示すもので、１はインバータで、この
インバータ１の出力はりアクドル２とコンデンサ３とを
介し、整流器からなる非線形負荷４に接続される。この
負荷４の入力側にはインダクタンス５とコンテンプ６０
面列回路からなるＬＯフィルタ７が接伏される。このＬ
Ｏフィルタ７はインバータ１の出力を非線形負荷４に供
給させたときに発生する高調波電流のために、インバー
タ１の出力電圧波形が歪のを防止するためのものである
。なｉ６８はコンデンサである。FIG. 1 shows a conventional example. Reference numeral 1 denotes an inverter, and the output of the inverter 1 is connected via an axle 2 and a capacitor 3 to a nonlinear load 4 consisting of a rectifier. On the input side of this load 4, there is an inductance 5 and a content 60.
An LO filter 7 consisting of a surface array circuit is connected. This L
The O filter 7 is used to prevent the output voltage waveform of the inverter 1 from being distorted due to harmonic current generated when the output of the inverter 1 is supplied to the nonlinear load 4. i68 is a capacitor.
上記のように非線形負荷４０入力側にＬＯフィルタ７を
設けると、ＬＯフィルタ７はインバータ１から見たとぎ
に進み回路になる。このため、進み電流が流れてインバ
ータ電流が増大する欠点を持っている。そこで、インバ
ータ１の負荷力率を調整して進み電流を抑制するために
、ＬＯフィルタ７と並列にインダクタンスＬ（図示省略
）を接続すればその調整が可能であるけれども％ＬＯフ
ィルタ７の容量が更に増大する欠点を伴う。従って、非
線形負荷４０入力側にＬＯフィルタ７を設け、高調波電
流を抑制することは好貰しくない。When the LO filter 7 is provided on the input side of the nonlinear load 40 as described above, the LO filter 7 becomes a forward circuit when viewed from the inverter 1. This has the disadvantage that a leading current flows and the inverter current increases. Therefore, in order to adjust the load power factor of the inverter 1 and suppress the lead current, it is possible to adjust it by connecting an inductance L (not shown) in parallel with the LO filter 7, but the capacity of the LO filter 7 is with further increasing drawbacks. Therefore, it is not desirable to provide the LO filter 7 on the input side of the nonlinear load 40 to suppress harmonic current.
この発明は上記の事情に鑑みてなされたもので、ＬＯフ
ィルタを使用しないでも非線形負荷によって発生する高
調波゛ば流によるインバータの出力電圧波形歪の改省を
図ることができるインバータの出力波形改善方法を提供
することを目的とする。This invention was made in view of the above circumstances, and is an improvement in the output waveform of an inverter that can reduce the distortion of the inverter's output voltage waveform due to harmonic current generated by a nonlinear load without using an LO filter. The purpose is to provide a method.
以下口面を参照してこの発明の一実施例を説明するに第
１図と同一部分には同一符号を付して示す。An embodiment of the present invention will be described below with reference to the mouth side, and the same parts as in FIG. 1 are designated by the same reference numerals.
第２図において、インバータ１の出力はりアクドル２と
コンデンサ３を介して整流器からなる非線形負荷４に供
給される。９はインノ々−夕１の出力電圧を検出するト
ランスで、このトランス９０１次側はインバータ１の出
力端と負荷４との電路に接続される。トランス９の２次
側出力はインノく一夕１の電圧制御用としてインバータ
１のゲートに供給されるとともに高調仮フィルタ１０に
与えられる。高ａ１．ｉｌ 波フィルタ１０はインノく
一夕１の出力電圧の筒調波分を検出するもので、このフ
ィルタ■０の出力に得られる高調渡分に比例した電圧を
インバータ１の出力電圧に重畳させる。In FIG. 2, the output of the inverter 1 is supplied via an accelerator 2 and a capacitor 3 to a nonlinear load 4 consisting of a rectifier. A transformer 9 detects the output voltage of the inverter 1, and the primary side of this transformer 90 is connected to the electrical path between the output end of the inverter 1 and the load 4. The secondary output of the transformer 9 is supplied to the gate of the inverter 1 for instantaneous voltage control, and is also applied to the temporary harmonic filter 10. High a1. The il wave filter 10 detects the cylindrical harmonic component of the output voltage of the inverter 1, and superimposes a voltage proportional to the harmonic component obtained in the output of the filter 1 on the output voltage of the inverter 1.
上記のように尚調波に比例した電圧を重畳させることに
よりインバータの出力電圧の高、１１ｉ１仮分を抑制す
ることができる。By superimposing a voltage proportional to the harmonic as described above, it is possible to suppress the high output voltage of the inverter and the 11i1 partial fraction.
なお、上記実施例において、高調渡分は電圧より基本渡
分を取除いてもよく、また各次調波別に検出して合成し
てもよい。In the above embodiment, the harmonic component may be obtained by removing the fundamental component from the voltage, or may be detected and combined for each harmonic.
次に第２図の回路を高調渡分だけに着目して等価回路を
考えると第３図のように表わされる。第３図において、
等価高調′ｅ電流源２０の電施工Ｈによって高調波電圧
■０が発生する。この電圧Ｖ。は次式で表わされる。Next, if we consider the equivalent circuit of the circuit of FIG. 2 by focusing only on the harmonic distribution, it is expressed as shown in FIG. 3. In Figure 3,
Equivalent harmonic 'e'e A harmonic voltage (■0) is generated by the electrical operation H of the current source 20. This voltage V. is expressed by the following formula.
ここで、Ｖ６＝ −ｋ ＶｏとするとＶＯは次式のよう
になる。Here, if V6=-kVo, VO becomes as shown in the following equation.
上記式において、ｋ→〜とするとｖｏ→○となる。In the above formula, when k→~, vo→○.
即ち、インバータの出力・配圧の＋％調波分に比例した
（ゲインを犬きくとる）電圧を重畳させるこ七により出
力電圧の高調渡分を抑制できる。That is, by superimposing a voltage proportional to the +% harmonics of the inverter output/voltage distribution (which reduces the gain), the harmonics of the output voltage can be suppressed.
以上述べたように、この発明によれば、インバータの出
力電圧を検出し、この検出電圧をインバータの電圧制御
に用いるとともに高調波フィルタに与えて高調波電圧を
取り出し、取り出された高調波電圧をインバータの出力
電圧へ重畳させるようしたので、従来方法のように大容
量のＬＯフィルタを必要としないでも、非線形負荷によ
るインバータの出力電圧波形歪を確実に改善することが
でき、また進み電流の増大も生じない等の優オ９た効果
を奏することができる。As described above, according to the present invention, the output voltage of the inverter is detected, this detected voltage is used for voltage control of the inverter, and is applied to the harmonic filter to extract the harmonic voltage. Because it is superimposed on the inverter's output voltage, it is possible to reliably improve the inverter's output voltage waveform distortion caused by nonlinear loads, without requiring a large-capacity LO filter like in the conventional method, and to increase the lead current. It is possible to achieve excellent effects such as not causing any problems.
第１図は従来の電圧制御インバータの出力波形改善方法
の概略構成図、第２図はこの発明の一実施例の概略構成
図、第３図は第２図の回路を高調渡分だけに着目した等
価回路図である。
１・・インバータ、２・・リアクートル、３・・コンデ
ンサ、４・・・非線形負荷、９・・・トランス、１ｏ・
・・高ｉ４波フィルタ。Fig. 1 is a schematic block diagram of a conventional method for improving the output waveform of a voltage controlled inverter, Fig. 2 is a schematic block diagram of an embodiment of the present invention, and Fig. 3 is the circuit of Fig. 2, focusing only on the harmonic component. FIG. 1...Inverter, 2...Reactor, 3...Capacitor, 4...Nonlinear load, 9...Transformer, 1o...
...High i4 wave filter.
Claims (1)
において、前記インバータの出力電圧を検出し、この検
出電圧をインバータの電圧制御に用いるとともに高調波
フィルタに与えて、高調波電圧を取り出し、取り出され
た高調波電圧を前記インバータの出力電圧へ重畳させる
ことを特徴とするインバータの出力波形改善方法。(]) In a method of supplying the output of an inverter to a nonlinear load, the output voltage of the inverter is detected, this detected voltage is used for voltage control of the inverter, and is also applied to a harmonic filter to extract the harmonic voltage. A method for improving an output waveform of an inverter, the method comprising: superimposing a harmonic voltage on the output voltage of the inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58147822A JP2593428B2 (en) | 1983-08-12 | 1983-08-12 | Inverter output waveform improvement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58147822A JP2593428B2 (en) | 1983-08-12 | 1983-08-12 | Inverter output waveform improvement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6039374A true JPS6039374A (en) | 1985-03-01 |
| JP2593428B2 JP2593428B2 (en) | 1997-03-26 |
Family
ID=15439010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58147822A Expired - Lifetime JP2593428B2 (en) | 1983-08-12 | 1983-08-12 | Inverter output waveform improvement device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2593428B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4639846A (en) * | 1985-08-16 | 1987-01-27 | Bbc Brown, Boveri & Company, Limited | Method and compensating device for compensating current oscillations |
| JPS6253179A (en) * | 1985-08-29 | 1987-03-07 | Meidensha Electric Mfg Co Ltd | Constant-voltage and constant-frequency power unit |
| JPH01222660A (en) * | 1988-02-26 | 1989-09-05 | Fuji Electric Co Ltd | Method of controlling cycloconverter |
| US5047909A (en) * | 1987-09-28 | 1991-09-10 | Kabushiki Kaisha Toshiba | Power conversion apparatus with harmonic filtration |
| JPH0690566A (en) * | 1992-09-04 | 1994-03-29 | J P Ii Kk | Control system of inverter |
| JP2015195656A (en) * | 2014-03-31 | 2015-11-05 | 三菱電機株式会社 | Power conversion device |
| US9812446B2 (en) | 2016-03-30 | 2017-11-07 | Toyota Motor Engineering & Manufacturing North America, Inc. | Electronic apparatus with pocket of low permittivity material to reduce electromagnetic interference |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5444361A (en) * | 1977-11-24 | 1979-04-07 | Nobuaki Mizobuchi | Washing machine of tableware* etc* |
| JPS55103075A (en) * | 1979-02-02 | 1980-08-06 | Hitachi Ltd | Device for measuring current of harmonic filter |
| JPS59106880A (en) * | 1982-12-09 | 1984-06-20 | Mitsubishi Electric Corp | Controlling method for pwm sinusoidal wave approximate output voltage inverter |
-
1983
- 1983-08-12 JP JP58147822A patent/JP2593428B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5444361A (en) * | 1977-11-24 | 1979-04-07 | Nobuaki Mizobuchi | Washing machine of tableware* etc* |
| JPS55103075A (en) * | 1979-02-02 | 1980-08-06 | Hitachi Ltd | Device for measuring current of harmonic filter |
| JPS59106880A (en) * | 1982-12-09 | 1984-06-20 | Mitsubishi Electric Corp | Controlling method for pwm sinusoidal wave approximate output voltage inverter |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4639846A (en) * | 1985-08-16 | 1987-01-27 | Bbc Brown, Boveri & Company, Limited | Method and compensating device for compensating current oscillations |
| JPS6253179A (en) * | 1985-08-29 | 1987-03-07 | Meidensha Electric Mfg Co Ltd | Constant-voltage and constant-frequency power unit |
| US5047909A (en) * | 1987-09-28 | 1991-09-10 | Kabushiki Kaisha Toshiba | Power conversion apparatus with harmonic filtration |
| JPH01222660A (en) * | 1988-02-26 | 1989-09-05 | Fuji Electric Co Ltd | Method of controlling cycloconverter |
| JPH0690566A (en) * | 1992-09-04 | 1994-03-29 | J P Ii Kk | Control system of inverter |
| JP2015195656A (en) * | 2014-03-31 | 2015-11-05 | 三菱電機株式会社 | Power conversion device |
| US9812446B2 (en) | 2016-03-30 | 2017-11-07 | Toyota Motor Engineering & Manufacturing North America, Inc. | Electronic apparatus with pocket of low permittivity material to reduce electromagnetic interference |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2593428B2 (en) | 1997-03-26 |
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