JPH0832178B2 - Non-circulating current type cycloconverter - Google Patents
Non-circulating current type cycloconverterInfo
- Publication number
- JPH0832178B2 JPH0832178B2 JP1016001A JP1600189A JPH0832178B2 JP H0832178 B2 JPH0832178 B2 JP H0832178B2 JP 1016001 A JP1016001 A JP 1016001A JP 1600189 A JP1600189 A JP 1600189A JP H0832178 B2 JPH0832178 B2 JP H0832178B2
- Authority
- JP
- Japan
- Prior art keywords
- converter
- output
- current
- phase
- current type
- 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 - Fee Related
Links
Landscapes
- Ac-Ac Conversion (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、三相負荷に給電する非循環電流式サイク
ロコンバータに関するもので、特に出力電流を二相同期
回転座標系へ変換する座標変換器に関するものである。The present invention relates to a non-circulating current type cycloconverter for feeding a three-phase load, and more particularly to a coordinate converter for converting an output current into a two-phase synchronous rotating coordinate system. It is about.
第5図は、例えば電気書院発行「サイクロコンバー
タ」(S51年11月20日発行)P81〜P85に示された非循環
電流式サイクロコンバータの電流座標変換器であり、
(1)は三相交流電源、(2)は三相の電力変換器、
(3)は出力電流検出器、(4)は三相負荷、(5)は
電流座標変換器であり三相交流電流を二相同期回転座標
系への変換演算をおこなう。(20)はこの演算結果によ
り電力変換器(2)を制御する電流制御器であり、上記
の電力変換器(2)、出力電流検出器(3)、電流座標
変換器(5)、電流制御器(20)で三相非循環式電流式
サイクロコンバータを形成する。FIG. 5 is a current coordinate converter of a non-circulating current type cycloconverter shown in P81 to P85, for example, "Cycloconverter" issued by Denki Shoin (issued on November 20, S51),
(1) is a three-phase AC power supply, (2) is a three-phase power converter,
(3) is an output current detector, (4) is a three-phase load, and (5) is a current coordinate converter, which performs conversion calculation of a three-phase alternating current into a two-phase synchronous rotating coordinate system. Reference numeral (20) is a current controller for controlling the power converter (2) based on the result of this calculation. The power converter (2), the output current detector (3), the current coordinate converter (5), and the current control A three-phase non-circulating current type cycloconverter is formed by the device (20).
次に動作について説明する。三相非循環電流式サイク
ロコンバータ(2)の出力電流iu,iv,iwは電流検出器
(3)により検出され電流座標変換器(5)へ入力され
る。座標変換器では1式に示される演算がおこなわれ二
相同期回転座標系の値id,iqが得られる。Next, the operation will be described. The output currents i u , iv , and i w of the three-phase non-circulating current type cycloconverter (2) are detected by the current detector (3) and input to the current coordinate converter (5). In the coordinate converter, the calculation shown in Formula 1 is performed to obtain the values i d and i q in the two-phase synchronous rotating coordinate system.
第6図に三相出力電流iu,iv,iw波形及び座標変換後
の電流id,iq波形を示す。 Fig. 6 shows the three-phase output currents i u , i v , and i w waveforms and the currents i d and i q waveforms after coordinate conversion.
従来の非循環電流式サイクロコンバータは以上のよう
に構成されているので、電力変換器の各相正負群コンバ
ータ切替に伴なう出力電流の零の期間、電流座標変換器
の出力が第6図に示すように変動してリツプルを出力す
るという不具合があつた。このリツプルは制御系に対し
ノイズのように働くので出力流形にも影響を及ぼすとい
う課題があつた。Since the conventional non-circulating current type cycloconverter is configured as described above, the output of the current coordinate converter is as shown in FIG. 6 during the period of zero output current accompanying the switching of each phase positive / negative group converter of the power converter. However, there was a problem that the ripple was changed and output as shown in. Since this ripple acts like noise on the control system, there is a problem that it also affects the output flow shape.
この発明は上記のような課題を解消するためになされ
たもので、非循環電流式サイクロコンバータの出力電流
のデツドバンドの影響による電流リツプルを除去するサ
イクロコンバータを得ることを目的とする。The present invention has been made to solve the above problems, and an object of the present invention is to obtain a cycloconverter that eliminates current ripple due to the influence of the dead band of the output current of the non-circulating current type cycloconverter.
この発明に係る非循環電流式サイクロコンバータは電
力変換器の各相正負群コンバータが切替中であることを
検出する切替期間検出手段と、上記期間中電流座標変換
器の出力をコンバータ切替開始時の値にホールドする出
力ホールド手段とを備えたものである。The non-circulating current type cycloconverter according to the present invention includes a switching period detection means for detecting that each phase positive / negative group converter of the power converter is switching, and an output of the current coordinate converter during the period when the converter switching is started. And an output holding means for holding the value.
この発明における、非循環電流式サイクロコンバータ
のコンバータ切替期間中電流座標変換器の出力をコンバ
ータ切替開始時の値にホールドすることにより、上記コ
ンバータ切替に伴なう出力電流リツプルの影響が除去さ
れ、座標変換器の出力が滑らかになる。In the present invention, by holding the output of the current coordinate converter during the converter switching period of the non-circulating current type cycloconverter at the value at the time of converter switching start, the influence of the output current ripple accompanying the converter switching is removed, The output of the coordinate converter becomes smooth.
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.
第1図において、(6)は電力変換器(2)内の正負
コンバータ切替期間検出回路、(7)は出力ホールド回
路であり外部入力の時間ΔTにより出力をホールド状態
にする回路である。In FIG. 1, (6) is a positive / negative converter switching period detection circuit in the power converter (2), and (7) is an output hold circuit, which is a circuit that puts the output in a hold state according to the external input time ΔT.
次に動作について説明する。 Next, the operation will be described.
第2図は正負コンバータ切替期間検出回路(6)の一
例を示し、(8),(9),(10)はコンパレータで、
入力の絶対値がある設定値より小さいとき出力をHレベ
ルにする。(11)はOR回路である。三相交流電流iu,
iv,iwが零近辺の値であることを検出し、その期間を正
負コンバータ切替期間とみなしΔTとしてHレベルを出
力するものである。第3図は出力ホールド回路(7)の
一例であり(12),(15)は入力ΔTがHレベルのとき
にOFFする接点、(14)は入力ΔTがHレベルのときON
する接点、(13)はメモリ回路であり入力ΔTがHレベ
ルの間出力をホールド状態に保つ。FIG. 2 shows an example of the positive / negative converter switching period detection circuit (6), and (8), (9) and (10) are comparators,
When the absolute value of the input is smaller than a certain set value, the output is set to H level. (11) is an OR circuit. Three-phase alternating current i u ,
i v, detects that i w is a value near zero, and outputs the H level as ΔT considers the period between polarity switching period. FIG. 3 shows an example of the output hold circuit (7) (12) and (15) are contacts that turn off when the input ΔT is at H level, and (14) that are on when the input ΔT is at H level.
A contact (13) is a memory circuit, which holds the output in the hold state while the input ΔT is at the H level.
第4図は、第1図各部の動作波形を示す。 FIG. 4 shows operation waveforms of each part of FIG.
三相非循環電流式サイクロコンバータの正負コンバー
タ切替期間すなわちΔTがHレベルの間id,iqの値をホ
ールドすることによりid,iqの電流リツプルが除去さ
れ、滑らかなid′,iq′が得られる。By holding the values of i d and i q while the positive / negative converter switching period of the three-phase non-circulating current type cycloconverter, that is, ΔT is at the H level, the current ripples of i d and i q are removed, and smooth i d ′, i q ′ is obtained.
以上のように、この発明によれば三相非循環電流式サ
イクロコンバータの正負コンバータ切替期間中二相同期
回転座標変換器出力をホールドすることにより電流座標
変換器出力のリツプルを除去でき良好な制御が行える効
果がある。As described above, according to the present invention, by holding the output of the two-phase synchronous rotary coordinate converter during the positive / negative converter switching period of the three-phase non-circulating current type cycloconverter, ripples in the output of the current coordinate converter can be removed and good control can be performed. There is an effect that can be.
第1図は、この発明の一実施例による非循環電流式サイ
クロコンバータの電流座標変換器の構成図、第2図は第
1図の正負コンバータ切替期間検出回路の一例を示す構
成図、第3図は第1図の出力ホールド回路の一例を示す
構成図、第4図は第1図各部の動作波形図、第5図は従
来の非循環電流式サイクロコンバータの電流座標変換器
の構成図、第6図は第5図の各部の動作波形図である。 (1)は三相交流電源、(2)は三相非循環電流式サイ
クロコンバータ、(3)は出力電流検出器、(4)は三
相負荷、(5)は電流座標変換器、(6)は正負コンバ
ータ切替期間検出回路、(7)は出力ホールド回路、
(8),(9),(10)はコンパレータ、(11)はOR回
路、(12),(14),(15)は外部操作接点、(13)は
外部操作の出力ホールド回路、(20)は電流制御器であ
る。 なお、図中、同一符号は同一、又は相当部分を示す。1 is a configuration diagram of a current coordinate converter of a non-circulating current type cycloconverter according to an embodiment of the present invention, FIG. 2 is a configuration diagram showing an example of the positive / negative converter switching period detection circuit of FIG. 1, and FIG. 1 is a configuration diagram showing an example of the output hold circuit of FIG. 1, FIG. 4 is an operation waveform diagram of each part of FIG. 1, and FIG. 5 is a configuration diagram of a current coordinate converter of a conventional non-circulating current type cycloconverter. FIG. 6 is an operation waveform diagram of each part of FIG. (1) is a three-phase AC power supply, (2) is a three-phase non-circulating current type cycloconverter, (3) is an output current detector, (4) is a three-phase load, (5) is a current coordinate converter, and (6) ) Is a positive / negative converter switching period detection circuit, (7) is an output hold circuit,
(8), (9) and (10) are comparators, (11) is an OR circuit, (12), (14) and (15) are external operation contacts, (13) is an external operation output hold circuit, and (20) ) Is a current controller. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
座標系から、二相同期回転座標系へ変換する電流座標変
換器の出力で制御する三相非循環電流式サイクロコンバ
ータにおいて、上記電力変換器の正群・負群コンバータ
切替え中であることを検出する切替期間検出手段と、上
記コンバータ切替期間中上記電流座標変換器の出力をコ
ンバータ切替開始時の値にホールドする出力ホールド手
段を備えたことを特徴とする非循環電流式サイクロコン
バータ。1. A three-phase non-circulating current type cycloconverter which detects a three-phase output current of a power converter and controls the output from a current coordinate converter for converting from a stationary coordinate system to a two-phase synchronous rotating coordinate system. Switching period detecting means for detecting that the positive group / negative group converter of the power converter is being switched, and output holding means for holding the output of the current coordinate converter at the value at the start of converter switching during the converter switching period. A non-circulating current type cycloconverter characterized by being provided with.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1016001A JPH0832178B2 (en) | 1989-01-24 | 1989-01-24 | Non-circulating current type cycloconverter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1016001A JPH0832178B2 (en) | 1989-01-24 | 1989-01-24 | Non-circulating current type cycloconverter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02197261A JPH02197261A (en) | 1990-08-03 |
JPH0832178B2 true JPH0832178B2 (en) | 1996-03-27 |
Family
ID=11904389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1016001A Expired - Fee Related JPH0832178B2 (en) | 1989-01-24 | 1989-01-24 | Non-circulating current type cycloconverter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0832178B2 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5365921A (en) * | 1976-11-25 | 1978-06-12 | Toshiba Corp | Controller for cyclo converter |
JPS62268363A (en) * | 1986-05-12 | 1987-11-20 | Mitsubishi Electric Corp | Controller of cycloconverter of non-circulation current system |
-
1989
- 1989-01-24 JP JP1016001A patent/JPH0832178B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5365921A (en) * | 1976-11-25 | 1978-06-12 | Toshiba Corp | Controller for cyclo converter |
JPS62268363A (en) * | 1986-05-12 | 1987-11-20 | Mitsubishi Electric Corp | Controller of cycloconverter of non-circulation current system |
Also Published As
Publication number | Publication date |
---|---|
JPH02197261A (en) | 1990-08-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |