JPS6318990A - Controller for cycloconverter - Google Patents
Controller for cycloconverterInfo
- Publication number
- JPS6318990A JPS6318990A JP61162451A JP16245186A JPS6318990A JP S6318990 A JPS6318990 A JP S6318990A JP 61162451 A JP61162451 A JP 61162451A JP 16245186 A JP16245186 A JP 16245186A JP S6318990 A JPS6318990 A JP S6318990A
- Authority
- JP
- Japan
- Prior art keywords
- phase difference
- cycloconverters
- cycloconverter
- output voltage
- command
- 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
- 230000006698 induction Effects 0.000 claims abstract description 10
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000008597 Diospyros kaki Nutrition 0.000 description 1
- 244000236655 Diospyros kaki Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Control Of Multiple Motors (AREA)
- Ac-Ac Conversion (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、電源電流の高調波を低減するサイクロコン
バータ制御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cycloconverter control device that reduces harmonics of power supply current.
第６図は例えば文献、「ニュードライブエレクトロニク
ス」上山直彦著Ｐ１７８−Ｐ１８０に示された従来の２
台のサイクロコンバータの並列運転時の高調波電流低減
法の１例を示す図であり、１はサイクロコンバータ、２
は誘導電動機、３は電源トランスで、２台のサイクロコ
ンバータ１は同一の電圧指令で運転されている。Figure 6 shows, for example, the conventional 2 system shown in the literature "New Drive Electronics" by Naohiko Ueyama, pages 178-180.
1 is a diagram showing an example of a harmonic current reduction method during parallel operation of two cycloconverters, where 1 is a cycloconverter, 2
is an induction motor, 3 is a power transformer, and the two cycloconverters 1 are operated with the same voltage command.
次に動作について説明する。まず、２台のサイクロコン
バータｃ／ｃ１．Ｃ／Ｃ２（１）を一つの電圧指令Ｖで
運転する場合には電源トランスＴ、、Ｔ２（３）を図示
の如く挿入し適当に位相をずらすことによって任意の高
調波をキャンセルできる作用を利用して、例えばサイク
ロコンバータＣ／Ｃ１，Ｃ／ Ｃ２ｆｉｌへの入力端子
位相を３０″ずらすなどすることにより第５次と第７次
の高調波の除去を行なっている。Next, the operation will be explained. First, two cycloconverters c/c1. When operating the C/C2 (1) with one voltage command V, insert the power transformer T, T2 (3) as shown in the diagram and use the effect of canceling any harmonics by appropriately shifting the phase. The fifth and seventh harmonics are removed by, for example, shifting the phase of the input terminals to the cycloconverters C/C1 and C/C2fil by 30''.
従来のサイクロコンバータ制御装置における並列運転時
の高調波電流の消去法は以上のように行われているので
、同一の電圧指令を与えている時にバランス運転が崩れ
ると２基の誘導電動機の速度を個々に高精度で制御する
ことができない等の問題点があった。The harmonic current elimination method during parallel operation in conventional cycloconverter control equipment is performed as described above, so if the balanced operation is disrupted when the same voltage command is given, the speed of the two induction motors will be reduced. There were problems such as the inability to individually control them with high precision.
この発明は上記のような問題点を解消するためになされ
たもので、各誘導電動機を高精度で速度制御し、かつ、
入力電流高調波の低減ができるサイクロコンバータ制御
装置を得ることを目的とする。This invention was made to solve the above-mentioned problems, and it is possible to control the speed of each induction motor with high precision, and
The purpose of this invention is to obtain a cycloconverter control device that can reduce input current harmonics.
この発明に係るサイクロコンバータ制御装置は、２台の
サイクロコンバータの出力電圧の位相差を検出する出力
位相制御回路と前記出力電圧の位相差をある一定値に保
つようにサイクロコンバータに指令を与え、誘導電動機
を高精度制御するベクトル制御系とを設けるようにした
ものである。The cycloconverter control device according to the present invention includes an output phase control circuit that detects the phase difference between the output voltages of two cycloconverters, and a command to the cycloconverters to maintain the phase difference between the output voltages at a certain constant value. A vector control system is provided to control the induction motor with high precision.
この発明におけるサイクロコンバータ制？ｆｆ［ａ置は
、２台のサイクロコンバータの出力電圧の位相差がＯｏ
。Cycloconverter system in this invention? At position ff[a, the phase difference between the output voltages of the two cycloconverters is Oo
.
６０’、１２０°・・・・・・などの特定の値をもつと
き、高調波電流が打ち消される特性を利用し、上記出力
電圧の位相差を保つことにより、高調波電流を低減する
。The harmonic current is reduced by maintaining the phase difference of the output voltage by utilizing the characteristic that the harmonic current is canceled out when the output voltage has a specific value such as 60', 120°, etc.
以下、この発明の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
図中、第６図と同一の部分は同一の符号をもって図示し
た第１図において、４は高調波電流低減装置を鉄鋼圧延
機に実施した場合の圧延用ローラ、５はサイクロコンバ
ータＣ／Ｃ１，Ｃ／Ｃ２（１）の出力電圧位相差をある
一定の値に保つ出力位相制御回路、６はこの制御系で抑
えきれない高調波電流を吸収する高調波フィルタである
。In FIG. 1, the same parts as in FIG. 6 are indicated by the same reference numerals. 4 is a rolling roller when a harmonic current reduction device is implemented in a steel rolling mill, 5 is a cycloconverter C/C1, An output phase control circuit keeps the output voltage phase difference of C/C2 (1) at a certain constant value, and 6 is a harmonic filter that absorbs harmonic current that cannot be suppressed by this control system.
第２図は、第１図の実施例に用いられる出力位相制御回
路５の詳細について示したもので、１ａはサイクロコン
バータ１のベクトル制御系、１ｂは前記ベクトル制御系
１ａからの位相制御角の指令を実際のゲートパルスに変
換するゲートパルスジェネレータ、ＩＣは主回路、５ａ
はサイクロコンバータＣ／Ｃ１，とＣ／Ｃ２の位相差を
検出する位相差検出器、５ｂは位相差検出器５ａの位相
差情報を基にして位相差をある一定値に保つようにベク
トル制御系１ａに指令を与える位相差調整装置である。FIG. 2 shows details of the output phase control circuit 5 used in the embodiment shown in FIG. Gate pulse generator that converts commands into actual gate pulses, IC is the main circuit, 5a
5b is a phase difference detector that detects the phase difference between the cycloconverters C/C1 and C/C2, and 5b is a vector control system that maintains the phase difference at a certain constant value based on the phase difference information of the phase difference detector 5a. This is a phase difference adjustment device that gives a command to 1a.
また、第３図は第２図のＩＣに示したサイクロコンバー
タの主回路の構成図である。図において、１ｄ〜１ｆは
それぞれＵ、Ｖ、Ｗ相の各サイクロコンバータ、１ｇは
そのサイクロコンバータの単一ユニットを示したもので
ある。第３図に示すサイクロコンバータを、２段縦続接
続非循環電流方式１２相サイクロコンバータという。Further, FIG. 3 is a configuration diagram of the main circuit of the cycloconverter shown in the IC of FIG. 2. In the figure, 1d to 1f indicate U, V, and W phase cycloconverters, respectively, and 1g indicates a single unit of the cycloconverter. The cycloconverter shown in FIG. 3 is called a two-stage cascade-connected non-circulating current type 12-phase cycloconverter.
次に動作について説明する。まず、２基の誘導電動機２
が２台のサイクロコンバータ１によって同一速度、負荷
条件で運転している場合、２台のサイクロコンバータ間
の出力電圧位相差によって電源高調波がどのように変化
するかをシミュレートした結果を第４図及び第５図に示
す。なお、シミュレート結果は１１次、１３次調波域を
中心に示している。Next, the operation will be explained. First, two induction motors 2
When the two cycloconverters 1 are operated at the same speed and load conditions, the results of simulating how the power harmonics change depending on the output voltage phase difference between the two cycloconverters are shown in the fourth section. As shown in FIG. Note that the simulation results mainly show the 11th and 13th harmonic regions.
第４図の条件は電源トランスＴ＋、Ｔｚ（３１の構成が
全く同一のものであるとし、サイクロコンバータ１の入
力電圧の位相が等しい時の結果を示している。The conditions in FIG. 4 show the results when the power transformers T+ and Tz (31) have exactly the same configuration and the phases of the input voltages of the cycloconverter 1 are equal.
すなわち出力電圧位相差にかかわらず高調波成分１１ｆ
ｉ、１３ｆｉ成分は一定値存在するが、側帯波成分は２
台のサイクロコンバータの出力電圧の位相差を３０’、
９０°、・・・・・・に保つことにより大幅に低減でき
る。図中ｆｉは電源周波数、ｆＯはサイクロコンバータ
出力周波数である。In other words, regardless of the output voltage phase difference, the harmonic component 11f
The i, 13fi components exist at a constant value, but the sideband components are 2
The phase difference between the output voltages of the two cycloconverters is 30',
It can be significantly reduced by keeping it at 90°. In the figure, fi is the power supply frequency and fO is the cycloconverter output frequency.
また、第５図は電源トランスＴ、、Ｔ、を介すことによ
り２台のサイクロコンバータの入力電圧に１５″の位相
差を与えた場合の図であり、出力電圧位相差をＯ’、６
０”、１２０’、・・・・・・に保つことにより大幅に
高調波電流が低減している様子を示している。Moreover, Fig. 5 is a diagram when a phase difference of 15'' is given to the input voltages of two cycloconverters through power transformers T, , T, and the output voltage phase difference is O', 6
0'', 120', . . . , the harmonic current is significantly reduced.
このように高調波電流低減特性を利用し、位相差検出器
５ａによって検出した位相差が、３０６゜９０６、・・
・・・・または、Ｏ＠、６０ｏ、１２０’、 ・・・に
なるように位相差調整装置５ｂを通して制御し各そのベ
クトル制御系１ａに制御指令を与える。なお、位相差調
整装置には、急峻な指令値の変化を防ぐすミッタを備え
ている。In this way, by utilizing the harmonic current reduction characteristic, the phase difference detected by the phase difference detector 5a is 306°906,...
. . . or O@, 60o, 120', . . . through the phase difference adjustment device 5b, and a control command is given to each vector control system 1a. Note that the phase difference adjustment device is equipped with a transmitter that prevents sudden changes in the command value.
なお、上記実施例では、非循環電流方式サイクロコンバ
ータを用いた例について説明したが、循環電流方式サイ
クロコンバータに置き換えても上記実施例と同様の効果
を奏する。In the above embodiment, an example using a non-circulating current type cycloconverter has been described, but even if it is replaced with a circulating current type cycloconverter, the same effects as in the above embodiment can be obtained.
以上のように、この発明によれば、２台のサイクロコン
バータの並列運転時に発生する電源電流高調波成分を出
力位相制御回路を設けることによって効果的に低減でき
るように構成したので、高調波フィルタの負担も小さく
なり、かつ、構成も筒略化でき、価格も安価となる効果
がある。As described above, according to the present invention, since the power supply current harmonic components generated when two cycloconverters are operated in parallel can be effectively reduced by providing an output phase control circuit, the harmonic filter This has the effect of reducing the burden on users, simplifying the structure, and lowering the price.
第１図はこの発明の一実施例による鉄柵圧延機の電源及
び駆動系の概念図、第２図はこの発明の位相制御回路の
概略図、第３図は非循環電流方式のサイクロコンバータ
主回路構成図、第４図、第５図は、サイクロコンバータ
出力電圧位相差と、高調波電流の解析結果説明図、第６
図は、従来の並列運転時の高調波電流低減法を示した回
路図である。
図において、１はサイクロコンバータ、′１ａはベクト
ル制御系、２は誘導電動機、３は、電源トランス、５は
出力位相制御回路、５ａは位相差検出器、５ｂは位相差
調整装置である。
１：寸イア０コ；バー２ ２゛ぢ誘導で５ｚ、！かキ
（プシ、゛ ３：豐４源トラー／ス第２図
ゝ５
１ａ ベクｌ−ル隼ｌＩ彷ヤ先 ５ａ’イ１倉［
笈朽ξヒ差シ第Ｓ図
ＣFig. 1 is a conceptual diagram of the power supply and drive system of an iron fence rolling mill according to an embodiment of the present invention, Fig. 2 is a schematic diagram of a phase control circuit of the invention, and Fig. 3 is a main circuit of a non-circulating current type cycloconverter. The configuration diagrams, Figures 4 and 5 are explanatory diagrams of analysis results of cycloconverter output voltage phase difference and harmonic current, Figure 6
The figure is a circuit diagram showing a conventional method for reducing harmonic current during parallel operation. In the figure, 1 is a cycloconverter, '1a is a vector control system, 2 is an induction motor, 3 is a power transformer, 5 is an output phase control circuit, 5a is a phase difference detector, and 5b is a phase difference adjustment device. 1: Sunia 0ko; Bar 2 2゛ぢ induction to 5z,! Kaki (pushi, ゛ 3: 豐4源TRA/S Fig. 2 ゝ 5 1a Bekkl-le Hayabusa l I wander ahead 5a' I 1 kura [
Figure S C
Claims (2)
誘導電動機を駆動する２台のサイクロコンバータ及び電
源トランスとを有するサイクロコンバータ制御装置にお
いて、前記２台のサイクロコンバータの出力電圧の位相
差を検出する位相差検出器と、前記位相差検出器によっ
て検出され出力電圧位相差をある一定の値に保つべく各
サイクロコンバータのベクトル制御系に出力指令を与え
る位相差調整装置とを備え、前記位相差調整装置の指令
に応じて出力電圧位相を操作し、電源電流高調波を低減
するようにしたことを特徴とするサイクロコンバータ制
御装置。(1) In a cycloconverter control device having two cycloconverters and a power transformer that drive two induction motors operated in parallel at the same speed and under the same load conditions, the output voltage level of the two cycloconverters is comprising a phase difference detector that detects a phase difference, and a phase difference adjustment device that is detected by the phase difference detector and gives an output command to a vector control system of each cycloconverter in order to maintain the output voltage phase difference at a certain constant value, A cycloconverter control device characterized in that the output voltage phase is manipulated in accordance with a command from the phase difference adjustment device to reduce power supply current harmonics.
を与える位相差調整装置に急峻な指令値の変化を防止す
るリミッタを設けたことを特徴とする特許請求の範囲第
１項記載のサイクロコンバータ制御装置。(2) The phase difference adjustment device that issues a command to keep the output voltage phase difference constant is provided with a limiter that prevents a steep change in the command value. Cycloconverter control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61162451A JPS6318990A (en) | 1986-07-10 | 1986-07-10 | Controller for cycloconverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61162451A JPS6318990A (en) | 1986-07-10 | 1986-07-10 | Controller for cycloconverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6318990A true JPS6318990A (en) | 1988-01-26 |
| JPH0556119B2 JPH0556119B2 (en) | 1993-08-18 |
Family
ID=15754859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61162451A Granted JPS6318990A (en) | 1986-07-10 | 1986-07-10 | Controller for cycloconverter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6318990A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01238462A (en) * | 1988-03-16 | 1989-09-22 | Hitachi Ltd | Variable frequency power source device |
| US6879125B2 (en) | 2002-04-01 | 2005-04-12 | Nissan Motor Co., Ltd. | Control apparatus and method for at least one electrical rotating machine using compound current |
| CN109004866A (en) * | 2018-09-04 | 2018-12-14 | 武汉大学 | Hexagonal structure can present three port of type cascade converter topology and control method |
| CN111483784A (en) * | 2019-01-28 | 2020-08-04 | 天下逻辑股份有限公司 | Safety type roller controller for logistics transmission system |
-
1986
- 1986-07-10 JP JP61162451A patent/JPS6318990A/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01238462A (en) * | 1988-03-16 | 1989-09-22 | Hitachi Ltd | Variable frequency power source device |
| US6879125B2 (en) | 2002-04-01 | 2005-04-12 | Nissan Motor Co., Ltd. | Control apparatus and method for at least one electrical rotating machine using compound current |
| CN109004866A (en) * | 2018-09-04 | 2018-12-14 | 武汉大学 | Hexagonal structure can present three port of type cascade converter topology and control method |
| CN109004866B (en) * | 2018-09-04 | 2021-11-05 | 武汉大学 | Energy-feed three-port cascade converter topology with hexagonal structure and control method |
| CN111483784A (en) * | 2019-01-28 | 2020-08-04 | 天下逻辑股份有限公司 | Safety type roller controller for logistics transmission system |
| CN111483784B (en) * | 2019-01-28 | 2021-11-19 | 天下逻辑股份有限公司 | Safety type roller controller for logistics transmission system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0556119B2 (en) | 1993-08-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |