JP2000083386A - Pwm control device for self-exciting power converter unit - Google Patents

Pwm control device for self-exciting power converter unit

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Publication number
JP2000083386A
JP2000083386A JP10248548A JP24854898A JP2000083386A JP 2000083386 A JP2000083386 A JP 2000083386A JP 10248548 A JP10248548 A JP 10248548A JP 24854898 A JP24854898 A JP 24854898A JP 2000083386 A JP2000083386 A JP 2000083386A
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Japan
Prior art keywords
phase
self
voltage
pulse
pwm
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JP10248548A
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Japanese (ja)
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JP3598308B2 (en
Inventor
Naoki Morishima
直樹 森島
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a PWM control device for self-exciting power converter unit that can output a voltage with an optimum PWM pulse waveform suited for the purpose. SOLUTION: A PWM control device 10 used for a self-exciting power converter unit 1 is provided with phase detection means 5 and 6 of an AC voltage, an AC current detection means 4, a means 7 for calculating the effective power/ reactive power of an AC current, means 8 and 9 for calculating the effective power/reactive power of a voltage command signal based on the effective power/reactive power of the AC current and a command value, means 17 and 18 for calculating an amplitude value and a phase from the effective power/reactive power of the voltage command signal, a means 21 for obtaining the start/end phase of each pulse of a specific PWM pulse waveform based on the amplitude value, and means 19, 20, 22, 23, and 24 for outputting the control signal of the PWM pulse, based on the starting/ending phase of each pulse and the phase of the voltage command signal.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、自己消弧形素子を
用いた自励式電力変換装置のＰＷＭ制御装置に関し、特
に目的に応じた最適なＰＷＭパルス波形を発生させるこ
とができるものに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PWM control device for a self-excited power converter using a self-extinguishing element, and more particularly to a device capable of generating an optimum PWM pulse waveform according to a purpose. is there.

【０００２】[0002]

【従来の技術】電気学会半導体電力変換方式調査専門委
員会編「半導体電力変換回路」第６章に一般的な三角波
キャリア信号比較によるＰＷＭ(Pulse Width Modulati
n) 制御方式が記載されている。この内容に基づいて、
単相ブリッジでの三角波キャリア信号比較による電圧パ
ルスの生成方法を図９を用いて簡単に説明する。2. Description of the Related Art In Chapter 6, "Semiconductor Power Conversion Circuits" edited by the Institute of Electrical Engineers of Japan, "Pulse Width Modulati" based on a general triangular wave carrier signal comparison.
n) The control method is described. Based on this content,
A method of generating a voltage pulse by comparing a triangular carrier signal in a single-phase bridge will be briefly described with reference to FIG.

【０００３】図９（a)に示す制御整流素子１０２からな
る単相ブリッジの出力端子Ｔ１，Ｔ２間に発生する電圧
は、各パルスの極性，幅，及び位置が図９（c)に示すよ
うに変化するパルス列からなるＰＷＭパルス波形（１０
６）となる。この例では、半サイクル中に３パルスを有
する波形を示している。このようなＰＷＭパルス波形
は、図９(b) に示すように、電圧指令値（電圧指令信
号：変調信号）の１サイクル中に３周期を有する三角波
キャリア信号（上段用１０４，下段用１０５）を考え、
これと出力したい正弦波状の電圧指令値１０３とを比較
し、両者の交点にて制御整流素子１０２のスイッチング
を行わせることにより、生成することができる。The voltage generated between the output terminals T1 and T2 of the single-phase bridge composed of the control rectifier 102 shown in FIG. 9A has the polarity, width and position of each pulse as shown in FIG. 9C. A PWM pulse waveform (10
6). In this example, a waveform having three pulses in a half cycle is shown. As shown in FIG. 9B, such a PWM pulse waveform has a triangular wave carrier signal having three periods in one cycle of a voltage command value (voltage command signal: modulation signal) (upper stage 104, lower stage 105). Thinking,
This can be generated by comparing this with the sinusoidal voltage command value 103 to be output and causing the control rectifier 102 to switch at the intersection of the two.

【０００４】この三角波キャリア信号比較によるＰＷＭ
制御方式を用いた従来の自励式電力変換装置の構成及び
制御方法を図８を用いて説明する。図において、１は自
励式電力変換装置であり、自己消弧形の制御整流素子を
用いた３相ブリッジ等で構成され、該制御整流素子にゲ
ートパルスが入力されると該入力されるゲートパルスに
応じて、直流電圧から矩形のパルス列からなる交流電圧
を発生する。２は自励式電力変換装置１の交流側と３相
交流系統との間に配設された変換装置用変圧器、３は自
励式電力変換装置１の直流側の電圧を安定化するための
直流コンデンサである。４は変換装置用変圧器２の交流
系統側の３相の交流電流を検出してこれを交流電流検出
信号として出力する交流電流検出器、５は変換装置用変
圧器２の交流系統側の３相の交流電圧を検出してこれを
交流電圧検出信号として出力する交流電圧検出器であ
る。６は交流電圧検出器５から出力される３相の交流電
圧検出信号のうちのいずれか１相の交流電圧検出信号の
位相を同期検出してこれを交流電圧位相検出信号として
出力するＰＬＬ装置、７はＰＬＬ装置６から出力される
交流電圧位相検出信号を用いて、交流電流検出器から出
力される交流電流検出信号を有効電流成分と無効電流成
分の２成分に変換する３相／２相変換器、８，９は、そ
れぞれ、外部から入力される有効電流指令，及び無効電
流指令に対する３相／２相変換器から出力される交流電
流検出信号の有効電流成分，及び無効電流成分の差分を
算出する減算器、１０は減算器８の出力を増幅する有効
電流制御器、１１は減算器９の出力を増幅する無効電流
制御器である。１２は有効電流制御器１０の出力と無効
電流制御器１１の出力とを、自励式電力変換装置１が実
際に発生すべき交流電圧を表す電圧指令値に変換する２
相／３相変換器である。１３はＰＬＬ装置６から出力さ
れる交流電圧位相検出信号に同期した三角波キャリア信
号を３相分出力するキャリア発生器、１４，１５，１６
は２相／３相変換器１３から出力される電圧指令値とキ
ャリア発生器１４〜１６から出力される三角波キャリア
信号とを比較して、自励式電力変換装置１の制御整流素
子を制御するためのゲートパルスを発生するＰＷＭ制御
器である。ここで、交流電流検出器４、交流電圧検出器
５、ＰＬＬ装置６、３相／２相変換器７、減算器８，
９、有効電流制御器１０、無効電流制御器１１、２相／
３相変換器１２、キャリア発生器１３、ＰＷＭ制御器１
４〜１６がＰＷＭ制御装置１０１を構成する。[0004] PWM based on this triangular wave carrier signal comparison
The configuration and control method of a conventional self-excited power converter using a control method will be described with reference to FIG. In the figure, reference numeral 1 denotes a self-excited power converter, which is constituted by a three-phase bridge or the like using a self-extinguishing type control rectifier, and when a gate pulse is input to the control rectifier, the input gate pulse , An AC voltage composed of a rectangular pulse train is generated from the DC voltage. Reference numeral 2 denotes a converter transformer disposed between the AC side of the self-excited power converter 1 and the three-phase AC system, and 3 denotes a DC for stabilizing the voltage on the DC side of the self-excited power converter 1. It is a capacitor. Reference numeral 4 denotes an AC current detector for detecting three-phase AC currents on the AC system side of the converter transformer 2 and outputting this as an AC current detection signal. Reference numeral 5 denotes an AC system side 3 of the converter transformer 2. This is an AC voltage detector that detects an AC voltage of a phase and outputs this as an AC voltage detection signal. 6, a PLL device for synchronously detecting the phase of any one of the three-phase AC voltage detection signals output from the AC voltage detector 5 and outputting this as an AC voltage phase detection signal; Reference numeral 7 denotes a three-phase / two-phase converter for converting an AC current detection signal output from the AC current detector into two components, an active current component and a reactive current component, using the AC voltage phase detection signal output from the PLL device 6. And 8 and 9 respectively determine the difference between the active current component and the reactive current component of the AC current detection signal output from the three-phase / two-phase converter with respect to the active current command and the reactive current command input from the outside. The subtractor 10 to be calculated is an active current controller that amplifies the output of the subtractor 8, and 11 is a reactive current controller that amplifies the output of the subtractor 9. Numeral 12 converts the output of the active current controller 10 and the output of the reactive current controller 11 into a voltage command value representing an AC voltage to be actually generated by the self-excited power converter 1.
It is a phase / 3-phase converter. Reference numeral 13 denotes a carrier generator which outputs a triangular carrier signal synchronized with the AC voltage phase detection signal output from the PLL device 6 for three phases.
Is for comparing the voltage command value output from the two-phase / 3-phase converter 13 with the triangular carrier signal output from the carrier generators 14 to 16 to control the control rectifier of the self-excited power converter 1. Is a PWM controller that generates a gate pulse of the PWM controller. Here, an AC current detector 4, an AC voltage detector 5, a PLL device 6, a three-phase / two-phase converter 7, a subtractor 8,
9, active current controller 10, reactive current controller 11, 2 phase /
Three-phase converter 12, carrier generator 13, PWM controller 1
4 to 16 constitute the PWM control device 101.

【０００５】次に、以上のように構成された自励式電力
変換装置及びＰＷＭ制御装置の動作を説明する。自励式
電力変換装置１は、直流電圧から図９(c) に示すような
ＰＷＭパルス波形の交流電圧を３相の各相について発生
する。この発生した３相の交流電圧は変換装置用変圧器
２を介して交流系統の交流電圧と平衡する。Next, the operation of the self-excited power converter and the PWM controller configured as described above will be described. The self-excited power converter 1 generates an AC voltage having a PWM pulse waveform as shown in FIG. 9C for each of the three phases from the DC voltage. The generated three-phase AC voltage is balanced with the AC voltage of the AC system via the converter transformer 2.

【０００６】この交流電圧によって流れる交流電流は交
流電流検出器４で検出され、この検出された交流電流検
出信号（３相分）は、３相／２相変換器７で、ＰＬＬ装
置６から出力される交流電圧位相検出信号を用いて、該
交流電圧位相検出信号と同期して回転する座標系（ｄ−
ｑ座標系）に変換され、有効電流成分と無効電流成分と
の２成分に分解される。The AC current flowing by the AC voltage is detected by an AC current detector 4, and the detected AC current detection signal (for three phases) is output from a PLL device 6 by a three-phase / two-phase converter 7. The coordinate system (d−) that rotates in synchronization with the AC voltage phase detection signal by using the detected AC voltage phase detection signal.
(q coordinate system) and is decomposed into two components, an active current component and a reactive current component.

【０００７】次いで、減算器８，９で、この分解された
交流電流検出信号の有効電流成分，及び無効電流成分
と、上位の制御系から指令される有効電流指令値，及び
無効電流指令値との差分がそれぞれ算出され、それぞ
れ、有効電流制御器１０，及び無効電流制御器１１で増
幅される。Next, in the subtracters 8 and 9, the active current component and the reactive current component of the separated AC current detection signal, the active current command value and the reactive current command value commanded from the upper control system, and Are calculated and amplified by the active current controller 10 and the reactive current controller 11, respectively.

【０００８】この増幅された各差分は、２相／３相変換
器１２で、再びＰＬＬ装置６から出力される交流電圧位
相検出値を用いて、自励式電力変換装置１が実際に出力
すべき３相交流電圧を表す３相の電圧指令値に変換され
る。この変換された各相の電圧指令値は、ＰＷＭ制御器
１４，１５，１６で、キャリア発生器１３から出力され
る三角波キャリア信号とそれぞれ比較され、それにより
ゲートパルスが発生される。そして、この発生したゲー
トパルスが自励式電力変換装置１の制御整流素子に入力
され、それにより、直流側の直流電圧から、該入力され
たゲートパルスに応じたＰＷＭパルス波形の交流電圧が
発生する。このＰＷＭパルス波形生成の詳細は、図９で
説明した通りである。The amplified differences are actually output from the self-excited power converter 1 by the two-phase / three-phase converter 12 using the AC voltage phase detection value output from the PLL device 6 again. It is converted into a three-phase voltage command value representing a three-phase AC voltage. The converted voltage command values of the respective phases are respectively compared with the triangular wave carrier signals output from the carrier generator 13 by the PWM controllers 14, 15, and 16, whereby gate pulses are generated. Then, the generated gate pulse is input to the control rectifier of the self-excited power converter 1, whereby an AC voltage having a PWM pulse waveform corresponding to the input gate pulse is generated from the DC voltage on the DC side. . The details of the generation of the PWM pulse waveform are as described with reference to FIG.

【０００９】[0009]

【発明が解決しようとする課題】ところで、このような
電圧指令値と三角波キャリア信号との比較によるＰＷＭ
制御方式の場合、以下のような問題点がある。図１０
は、自励式電力変換装置の出力電圧波形の一例として、
半サイクル中に３パルスを有するＰＷＭパルス波形を一
般的な形で表したものである。図１０に示すように、本
来、３パルスのＰＷＭパルス波形には中央のパルスのパ
ルス幅θ１と、両サイドのパルスのパルス幅θ２と、そ
の位置の位相±γとの３つの自由度（パラメータ）があ
る。この３つのパラメータをうまく選ぶことにより、目
的に応じた最適な電圧を発生できるはずである。例え
ば、５次、７次の高調波を完全に消去して発生しないよ
うにし、しかも任意の基本波電圧（振幅値Ｖｏ）を発生
させたければ、周波数解析の結果から下記の式が成立す
るような３つのパラメータとすればよい。By the way, PWM based on a comparison between such a voltage command value and a triangular carrier signal is described.
The control method has the following problems. FIG.
Is an example of the output voltage waveform of the self-excited power converter.
Fig. 3 is a general representation of a PWM pulse waveform having three pulses during a half cycle. As shown in FIG. 10, the three-degree PWM pulse waveform originally has three degrees of freedom (pulse width θ1 of the center pulse, pulse width θ2 of the pulses on both sides, and the phase ± γ of the position) (parameters). ). By properly selecting these three parameters, it is possible to generate an optimum voltage according to the purpose. For example, if the fifth and seventh harmonics are completely eliminated so as not to generate them and an arbitrary fundamental voltage (amplitude value Vo) is to be generated, the following equation is established from the result of the frequency analysis. These three parameters may be used.

【００１０】 （４Ｅd / π )｛sin(θ1 / ２) ＋２sin(θ2 / ２)cosγ｝＝Ｖo （１）式 sin(５θ1 / ２）＋２sin(５θ2 / ２）cos ５γ＝０ （２）式 sin(７θ1 / ２）＋２sin(７θ2 / ２）cos ７γ＝０ （３）式 これらの式からもわかるように、基本波振幅Ｖｏからパ
ルスの位相や幅が決定されるわけである。[0010] (4Ed / π) {sin ( θ 1/2) + 2sin (θ 2/2) cosγ} = Vo (1) equation sin (5θ 1/2) + 2sin (5θ 2/2) cos 5γ = 0 ( 2) sin (7θ 1/2) + 2sin (7θ 2/2) cos 7γ = 0 (3) equation as is apparent from these equations, not the phase and width of the pulse from the fundamental wave amplitude Vo is determined is there.

【００１１】このような関係を持ったパルスを三角波キ
ャリア信号比較によるＰＷＭ制御方式で作り出すことは
不可能である。三角波キャリア信号比較によるＰＷＭ制
御方式では、ＰＷＭパルス波形は三角波キャリア信号の
波形によって制約されるため、θ１、θ２、γの３つの
パラメータは独立のパラメータではなく、従って、基本
波振幅Ｖｏに関連してパルスを作り出すことはできない
からである。It is impossible to generate a pulse having such a relationship by a PWM control method based on a triangular wave carrier signal comparison. In the PWM control method based on the triangular carrier signal comparison, since the PWM pulse waveform is restricted by the waveform of the triangular carrier signal, the three parameters θ1, θ2, and γ are not independent parameters, and are therefore related to the fundamental wave amplitude Vo. A pulse cannot be created.

【００１２】このように、目的に応じて、パルス波形が
本来持つ自由度をうまく使って最適な電圧を発生させよ
うとしても、従来の三角波キャリア信号を利用したＰＷ
Ｍ制御方式では不可能である。一方、ＰＷＭパルス波形
の電圧をうまく発生させることにより、高調波低減、変
換器損失低減、電圧利用率向上による自励式電力変換装
置のコンパクト化、電圧時間積低減による変換装置用変
圧器のコンパクト化など、多くの実用的なメリットが生
まれる。As described above, according to the purpose, even if an attempt is made to generate an optimum voltage by making good use of the degree of freedom inherent in a pulse waveform, a conventional PW using a triangular wave carrier signal is used.
This is not possible with the M control method. On the other hand, by successfully generating the voltage of the PWM pulse waveform, it is possible to reduce the harmonics, reduce the converter loss, make the self-excited power converter compact by improving the voltage utilization rate, and make the transformer for the converter compact by reducing the voltage-time product. Many practical benefits are born.

【００１３】このように従来の三角波キャリア信号比較
によるＰＷＭ制御方式では、ＰＷＭパルス波形の電圧パ
ルスが本来持っている自由度を生かし切れないので、高
調波特性改善、電圧利用率向上、電圧時間積低減、自励
式電力変換装置の損失低減、制御性能向上などといった
目的に応じた最適なＰＷＭパルス波形の電圧を出力する
ことができないという問題があった。As described above, in the conventional PWM control system based on triangular wave carrier signal comparison, since the inherent freedom of the voltage pulse of the PWM pulse waveform cannot be utilized, the improvement of the harmonic characteristics, the improvement of the voltage utilization rate, and the improvement of the voltage time There has been a problem that it is not possible to output a voltage having an optimum PWM pulse waveform according to purposes such as a reduction in product, a loss in a self-excited power converter, and an improvement in control performance.

【００１４】本発明はこのような問題点を解決するため
になされたもので、目的に応じた最適なＰＷＭパルス波
形の電圧を出力することができる自励式電力変換装置用
ＰＷＭ制御装置を提供することを目的としている。The present invention has been made in order to solve such problems, and provides a PWM control apparatus for a self-excited power converter capable of outputting a voltage having an optimum PWM pulse waveform according to the purpose. It is intended to be.

【００１５】[0015]

【課題を解決するための手段】本発明（請求項１）に係
る自励式電力変換装置用ＰＷＭ制御装置は、制御信号に
応じてＯＮ／ＯＦＦして、直流電圧からパルス波形の交
流電圧を発生する自励式電力変換装置に用いられ、上記
発生する交流電圧の位相と該交流電圧に基づいて流れる
交流電流の値とを検出し、該検出した交流電圧の位相及
び交流電流の値から該交流電圧の位相と同期した２軸の
回転座標系での交流電流の有効分及び無効分を算出し、
該算出した交流電流の有効分及び無効分と外部から入力
される上記交流電流の有効分及び無効分に対する指令値
とに基づいて上記制御信号を出力することにより、上記
自励式電力変換装置にＰＷＭパルス波形の交流電圧を発
生させて、上記交流電流の有効分及び無効分を制御する
ＰＷＭ制御装置において、上記算出した交流電流の有効
分及び無効分と上記外部から入力される交流電流の有効
分及び無効分に対する指令値とに基づいて、上記発生さ
せるＰＷＭパルス波形の交流電圧の変調信号たる電圧指
令信号の有効分と無効分とを算出し、該算出した電圧指
令信号の有効分と無効分とから、該電圧指令信号の振幅
値と位相とを算出し、該算出した振幅値に基づいて所定
のＰＷＭパルス波形の各パルスの始端及び終端の位相を
求め、該求めた所定のＰＷＭパルス波形の各パルスの始
端及び終端の位相と上記算出した電圧指令信号の位相と
に基づいて、上記制御信号を出力するようにしたもので
ある。According to a first aspect of the present invention, a PWM controller for a self-excited power converter is turned on / off according to a control signal to generate an AC voltage having a pulse waveform from a DC voltage. The phase of the generated AC voltage and the value of the AC current flowing based on the AC voltage are detected, and the AC voltage is detected based on the detected phase and the value of the AC current. Calculate the effective and ineffective components of the alternating current in the two-axis rotating coordinate system synchronized with the phase of
By outputting the control signal based on the calculated active component and reactive component of the AC current and a command value for the active component and the reactive component of the AC current input from the outside, the PWM is transmitted to the self-excited power converter. In a PWM control device which generates an AC voltage having a pulse waveform and controls the effective and ineffective components of the AC current, the PWM controller includes an effective component and an invalid component of the calculated AC current and an effective component of the AC current input from the outside. Based on the command value for the invalid component and the command value for the invalid component, the effective component and the invalid component of the voltage command signal, which is the modulation signal of the AC voltage of the generated PWM pulse waveform, are calculated, and the effective component and the invalid component of the calculated voltage command signal are calculated. From the above, the amplitude value and the phase of the voltage command signal are calculated, and the starting and ending phases of each pulse of a predetermined PWM pulse waveform are obtained based on the calculated amplitude value. Based on the phase of the beginning and end of each pulse of the PWM pulse waveform phase and the calculated voltage command signals, in which to output the control signal.

【００１６】本発明（請求項２）に係る自励式電力変換
装置用ＰＷＭ制御装置は、上記自励式電力変換装置用Ｐ
ＷＭ制御装置（請求項１）が、上記算出した振幅値から
所定のＰＷＭパルス波形の各パルスの始端及び終端の位
相を演算するパルス発生／終了位相演算器と、該求めた
所定のＰＷＭパルス波形の各パルスの始端及び終端の位
相と上記算出した電圧指令信号の位相とに基づいて、上
記制御信号を出力するＰＷＭ制御器とを有するものとし
たものである。[0016] The PWM control apparatus for a self-excited power converter according to the present invention (claim 2) is a PWM control apparatus for the self-excited power converter.
A pulse generation / end phase calculator for calculating a starting and ending phase of each pulse of the predetermined PWM pulse waveform from the calculated amplitude value, a WM control device (claim 1), and the obtained predetermined PWM pulse waveform And a PWM controller that outputs the control signal based on the phase of the start and end of each pulse and the phase of the calculated voltage command signal.

【００１７】本発明（請求項３）に係る自励式電力変換
装置用ＰＷＭ制御装置は、上記自励式電力変換装置用Ｐ
ＷＭ制御装置（請求項１）において、上記電圧指令信号
の振幅値に対する所定のＰＷＭパルス波形の各パルスの
始端及び終端の位相を表すテーブルを予め記憶し、上記
算出した電圧指令信号の振幅値を該記憶しているテーブ
ルと対比して所定のＰＷＭパルス波形の各パルスの始端
及び終端の位相を求め、該求めた所定のＰＷＭパルス波
形の各パルスの始端及び終端の位相と上記算出した電圧
指令信号の位相とに基づいて、上記制御信号を出力する
ようにしたものである。The PWM control device for a self-excited power converter according to the present invention (claim 3) is a PWM control device for the self-excited power converter.
In the WM control device (claim 1), a table representing the start and end phases of each pulse of a predetermined PWM pulse waveform with respect to the amplitude value of the voltage command signal is stored in advance, and the calculated amplitude value of the voltage command signal is stored in the WM control device. The starting and ending phases of each pulse of the predetermined PWM pulse waveform are obtained by comparing with the stored table, and the obtained starting and ending phases of each pulse of the predetermined PWM pulse waveform are calculated with the calculated voltage command. The control signal is output based on the phase of the signal.

【００１８】本発明（請求項４）に係る自励式電力変換
装置用ＰＷＭ制御装置は、上記自励式電力変換装置用Ｐ
ＷＭ制御装置（請求項１）において、上記自励式電力変
換装置は３相の制御信号に応じて３相交流電圧を発生す
るものであり、上記算出した電圧指令信号の有効分及び
無効分を、検出した３相交流電圧の位相を用いて３相交
流の電圧指令信号の有効分及び無効分に変換し、該変換
した３相交流の電圧指令信号の有効分及び無効分から各
相ごとの振幅値と位相とを算出し、該算出した各相ごと
の振幅値に基づいて、各相ごとに所定のＰＷＭパルス波
形の各パルスの始端及び終端の位相を求め、該求めた所
定のＰＷＭパルス波形の各パルスの始端及び終端の位相
と上記算出した電圧指令信号の各相ごとの位相とに基づ
いて、上記３相の制御信号を出力するようにしたもので
ある。The PWM control device for a self-excited power converter according to the present invention (claim 4) is a PWM control device for a self-excited power converter.
In the WM control device (Claim 1), the self-excited power conversion device generates a three-phase AC voltage according to a three-phase control signal. Using the detected phase of the three-phase AC voltage, the three-phase AC voltage command signal is converted into an effective component and an invalid component, and the converted three-phase AC voltage command signal is converted into an effective component and an invalid component, and the amplitude value for each phase is calculated. And the phase are calculated, and the start and end phases of each pulse of the predetermined PWM pulse waveform are obtained for each phase based on the calculated amplitude value for each phase, and the obtained predetermined PWM pulse waveform is calculated. The three-phase control signals are output based on the phases at the start and end of each pulse and the phase of each of the calculated voltage command signals.

【００１９】本発明（請求項５）に係る自励式電力変換
装置用ＰＷＭ制御装置は、上記自励式電力変換装置用Ｐ
ＷＭ制御装置（請求項１）において、上記自励式電力変
換装置を２以上多重化して有し、上記算出された電圧指
令信号の位相を上記自励式電力変換装置の多重化の段数
に応じて各段ごとに補正し、上記求めた所定のＰＷＭパ
ルス波形の各パルスの始端及び終端の位相と該各段ごと
に補正された電圧指令信号の位相とに基づいて、各段の
自励式電力変換装置に上記制御信号を出力するようにし
たものである。The PWM control apparatus for a self-excited power converter according to the present invention (claim 5) is a PWM control apparatus for a self-excited power converter.
In the WM control device (Claim 1), the self-excited power converter has two or more multiplexed power converters, and the phase of the calculated voltage command signal is determined according to the number of multiplexing stages of the self-excited power converter. The self-excited power converter of each stage is corrected based on the phases of the start and end of each pulse of the predetermined PWM pulse waveform and the phase of the voltage command signal corrected for each stage. The above-mentioned control signal is outputted.

【００２０】本発明（請求項６）に係る自励式電力変換
装置用ＰＷＭ制御装置は、上記自励式電力変換装置用Ｐ
ＷＭ制御装置（請求項５）において、上記算出した振幅
値から所定のＰＷＭパルス波形の各パルスの始端及び終
端の位相を演算により求め、該求めた所定のＰＷＭパル
ス波形の各パルスの始端及び終端の位相と上記各段ごと
に補正された電圧指令信号の位相とに基づいて、各段の
自励式電力変換装置に上記制御信号を出力するようにし
たものである。[0020] The PWM control apparatus for a self-excited power converter according to the present invention (claim 6) is a PWM control apparatus for the self-excited power converter.
In the WM control device, the starting and ending phases of each pulse of the predetermined PWM pulse waveform are calculated from the calculated amplitude value, and the starting and ending points of each pulse of the obtained predetermined PWM pulse waveform are calculated. And the control signal is output to the self-excited power converter of each stage based on the phase of the voltage command signal corrected for each stage.

【００２１】本発明（請求項７）に係る自励式電力変換
装置用ＰＷＭ制御装置は、上記自励式電力変換装置用Ｐ
ＷＭ制御装置（請求項５）において、上記電圧指令信号
の振幅値に対する所定のＰＷＭパルス波形の各パルスの
始端及び終端の位相を表すテーブルを予め記憶し、上記
算出した電圧指令信号の振幅値を該記憶しているテーブ
ルと対比して所定のＰＷＭパルス波形の各パルスの始端
及び終端の位相を求め、該求めた所定のＰＷＭパルス波
形の各パルスの始端及び終端の位相と上記各段ごとに補
正された電圧指令信号の位相とに基づいて、各段の自励
式電力変換装置に上記制御信号を出力するようにしたも
のである。The PWM control apparatus for a self-excited power converter according to the present invention (claim 7) is a PWM control apparatus for a self-excited power converter.
In the WM control device (claim 5), a table representing the start and end phases of each pulse of a predetermined PWM pulse waveform with respect to the amplitude value of the voltage command signal is stored in advance, and the calculated amplitude value of the voltage command signal is stored in the WM control device. The starting and ending phases of the respective pulses of the predetermined PWM pulse waveform are obtained by comparing with the stored table, and the starting and ending phases of the obtained respective pulses of the predetermined PWM pulse waveform are determined according to the respective stages. The control signal is output to the self-excited power converter of each stage based on the corrected phase of the voltage command signal.

【００２２】本発明（請求項８）に係る自励式電力変換
装置用ＰＷＭ制御装置は、上記自励式電力変換装置用Ｐ
ＷＭ制御装置（請求項５）において、上記多重化された
自励式電力変換装置は３相の制御信号に応じて３相交流
電圧を発生するものであり、上記算出した電圧指令信号
の有効分及び無効分を、検出した３相交流電圧の位相を
用いて３相交流の電圧指令信号の有効分及び無効分に変
換し、該変換した３相交流の電圧指令信号の有効分及び
無効分から各相ごとの振幅値と位相とを算出するととも
に、該算出された電圧指令信号の位相を上記自励式電力
変換装置の多重化の段数に応じて各段ごとに補正し、上
記算出した各相ごとの振幅値に基づいて、各相ごとに所
定のＰＷＭパルス波形の各パルスの始端及び終端の位相
を求め、該求めた所定のＰＷＭパルス波形の各パルスの
始端及び終端の位相と上記各段ごとに補正された電圧指
令信号の各相ごとの位相とに基づいて、各段の自励式電
力変換装置に上記３相の制御信号を出力するようにした
ものである。[0022] The PWM control apparatus for a self-excited power converter according to the present invention (claim 8) includes the PWM control apparatus for a self-excited power converter.
In the WM control device (claim 5), the multiplexed self-excited power converter generates a three-phase AC voltage in accordance with a three-phase control signal. The invalid component is converted into a valid component and an invalid component of the three-phase AC voltage command signal using the detected phase of the three-phase AC voltage, and each phase is converted from the valid component and the invalid component of the converted three-phase AC voltage command signal. And the phase of the calculated voltage command signal is corrected for each stage according to the number of multiplexing stages of the self-excited power conversion device, and the calculated value for each phase is calculated. Based on the amplitude value, the starting and ending phases of each pulse of the predetermined PWM pulse waveform are obtained for each phase, and the starting and ending phases of each pulse of the obtained predetermined PWM pulse waveform are calculated for each of the above stages. For each phase of the corrected voltage command signal Based on the phase, in which to output the control signal of the 3-phase self-commutated power converter for each stage.

【００２３】[0023]

【発明の実施の形態】実施の形態１．図１は本発明の実
施の形態１によるＰＭＷ制御装置を用いた自励式電力変
換装置の構成を示すブロック図である。図において、１
は自励式電力変換装置であり、自己消弧形の制御整流素
子を用いた３相ブリッジ等で構成され、該制御整流素子
にゲートパルスが入力されると該入力されるゲートパル
スに応じて、直流電圧から矩形のパルス列からなる交流
電圧を発生する。２は自励式電力変換装置１の交流側と
３相交流系統との間に配設された変換装置用変圧器、３
は自励式電力変換装置１の直流側の電圧を安定化するた
めの直流コンデンサである。４は変換装置用変圧器２の
交流系統側の３相の交流電流を検出してこれを交流電流
検出信号として出力する交流電流検出器、５は変換装置
用変圧器２の交流系統側の３相の交流電圧を検出してこ
れを交流電圧検出信号として出力する交流電圧検出器で
ある。６は交流電圧検出器５から出力される３相の交流
電圧検出信号のうちのいずれか１相の交流電圧検出信号
の位相を同期検出してこれを交流電圧位相検出信号とし
て出力するＰＬＬ装置、７はＰＬＬ装置６から出力され
る交流電圧位相検出信号を用いて、交流電流検出器４か
ら出力される交流電流検出信号を有効電流成分（有効
分）と無効電流成分（無効分）との２成分に変換する３
相／２相変換器、８，９は、それぞれ、外部から入力さ
れる有効電流指令，及び無効電流指令に対する３相／２
相変換器７から出力される交流電流検出信号の有効電流
成分，及び無効電流成分の差分を算出する減算器、１０
は減算器８の出力を増幅する有効電流制御器、１１は減
算器９の出力を増幅する無効電流制御器である。１７は
有効電流制御器１０の出力と無効電流制御器１１の出力
とから、自励式電力変換装置１が実際に発生すべき交流
電圧を表す電圧指令値（電圧指令信号）の振幅を算出す
る電圧指令値振幅演算器、１８は有効電流制御器１０の
出力と、無効電流制御器１１の出力と、ＰＬＬ装置６の
出力とから交流電圧検出信号に対する交流電流検出信号
の位相差（以下、交流電圧位相との位相ずれという）を
算出する電圧指令値位相ずれ演算器である。１９は電圧
指令値位相ずれ演算器１８で算出された位相ずれをＰＬ
Ｌ装置６から出力される交流電圧位相検出信号に加算し
て電圧指令値の絶対位相を算出する加算器、２０は加算
器１９から出力される電圧指令値の絶対位相から３相の
各相の電圧指令値の位相を算出して出力する位相３相配
分器、２１は電圧指令値振幅演算器１７から出力される
電圧指令値の振幅から従来の技術で述べた３つのパラメ
ータ、すなわち、中央のパルスのパルス幅θ１、両サイ
ドのパルスのパルス幅θ２、及びその位置の位相±γを
算出し、これをパルスの発生（始端）／終了（終端）位
相で表すようにして出力するパルス発生／終了位相演算
器である。２２，２３，２４は、パルス発生／終了位相
演算器２１から出力されるパルス発生／終了位相と位相
３相配分器２０から出力される各相の電圧指令値の位相
とに基づいてゲートパルスを生成し、これを自励式電力
変換器１の各相の制御整流素子のゲートに出力するＰＷ
Ｍ制御器である。ここで、交流電流検出器４、交流電圧
検出器５、ＰＬＬ装置６、３相／２相変換器７、減算器
８，９、有効電流制御器１０、無効電流制御器１１、電
圧指令値振幅演算器１７、電圧指令値位相ずれ演算器１
８、加算器１９、位相３相配分器、パルス発生／終了位
相演算器２１、ＰＷＭ制御器２２〜２４がＰＷＭ制御装
置１０１を構成する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a block diagram showing a configuration of a self-excited power converter using a PWM controller according to Embodiment 1 of the present invention. In the figure, 1
Is a self-excited power converter, which is constituted by a three-phase bridge or the like using a self-extinguishing control rectifier, and when a gate pulse is input to the control rectifier, according to the input gate pulse, An AC voltage composed of a rectangular pulse train is generated from the DC voltage. Reference numeral 2 denotes a converter transformer provided between the AC side of the self-excited power converter 1 and the three-phase AC system.
Is a DC capacitor for stabilizing the DC voltage of the self-excited power converter 1. Reference numeral 4 denotes an AC current detector for detecting three-phase AC currents on the AC system side of the converter transformer 2 and outputting this as an AC current detection signal. Reference numeral 5 denotes an AC system side 3 of the converter transformer 2. This is an AC voltage detector that detects an AC voltage of a phase and outputs this as an AC voltage detection signal. 6, a PLL device for synchronously detecting the phase of any one of the three-phase AC voltage detection signals output from the AC voltage detector 5 and outputting this as an AC voltage phase detection signal; Reference numeral 7 denotes an AC voltage phase detection signal output from the PLL device 6 and converts the AC current detection signal output from the AC current detector 4 into two components, an active current component (active component) and a reactive current component (inactive component). Convert to component 3
The phase / two-phase converters 8 and 9 respectively provide three-phase / 2-phase converters for an active current command and a reactive current command input from the outside.
A subtractor 10 for calculating a difference between an active current component and a reactive current component of the AC current detection signal output from the phase converter 7;
Is an active current controller for amplifying the output of the subtractor 8, and 11 is a reactive current controller for amplifying the output of the subtractor 9. Reference numeral 17 denotes a voltage for calculating the amplitude of a voltage command value (voltage command signal) representing an AC voltage to be actually generated by the self-excited power converter 1 from the output of the active current controller 10 and the output of the reactive current controller 11. A command value amplitude calculator 18 is a phase difference between an AC voltage detection signal and an AC voltage detection signal based on the output of the active current controller 10, the output of the reactive current controller 11, and the output of the PLL device 6. This is a voltage command value phase shift calculator for calculating the phase shift with respect to the phase. Reference numeral 19 denotes the phase shift calculated by the voltage command value phase shift calculator 18 as PL.
The adder 20 calculates the absolute phase of the voltage command value by adding to the AC voltage phase detection signal output from the L device 6. The adder 20 calculates the three phases from the absolute phase of the voltage command value output from the adder 19. The phase three-phase distributor 21 calculates and outputs the phase of the voltage command value. The three-phase allocator 21 calculates three parameters described in the related art from the amplitude of the voltage command value output from the voltage command value amplitude calculator 17, Calculate the pulse width θ1 of the pulse, the pulse width θ2 of the pulses on both sides, and the phase ± γ of the position, and output them by expressing them as the pulse generation (starting end) / ending (end) phase. The ending phase calculator. Reference numerals 22, 23, and 24 denote gate pulses based on the pulse generation / end phase output from the pulse generation / end phase calculator 21 and the phase of the voltage command value of each phase output from the three-phase distributor 20. PW which generates and outputs this to the gate of the control rectifier of each phase of the self-excited power converter 1
M controller. Here, AC current detector 4, AC voltage detector 5, PLL device 6, 3-phase / 2-phase converter 7, subtractors 8, 9, active current controller 10, reactive current controller 11, voltage command value amplitude Calculator 17, Voltage command value phase shift calculator 1
8, the adder 19, the three-phase distributor, the pulse generation / termination phase calculator 21, and the PWM controllers 22 to 24 constitute the PWM controller 101.

【００２４】次に、以上のように構成された自励式電力
変換装置１及びＰＷＭ制御装置１０１の動作を図１，図
２を用いて説明する。図２はＰＷＭパルス波形を示す図
であって、図２(a) は従来例によるＰＷＭパルス波形を
示す図、図２(b) は本実施の形態１によるＰＷＭパルス
波形を示す図である。Next, the operation of the self-excited power converter 1 and the PWM controller 101 configured as described above will be described with reference to FIGS. 2A and 2B are diagrams showing a PWM pulse waveform, FIG. 2A is a diagram showing a PWM pulse waveform according to a conventional example, and FIG. 2B is a diagram showing a PWM pulse waveform according to the first embodiment.

【００２５】図１において、自励式電力変換装置１は、
直流系統の直流電圧からＰＷＭパルス波形の交流電圧を
３相の各相について発生する。この発生した３相の交流
電圧は変換装置用変圧器２を介して交流系統の交流電圧
と平衡する。In FIG. 1, a self-excited power converter 1
An AC voltage having a PWM pulse waveform is generated for each of the three phases from the DC voltage of the DC system. The generated three-phase AC voltage is balanced with the AC voltage of the AC system via the converter transformer 2.

【００２６】この３相の交流電圧を交流電圧検出器５が
検出して、これを３相の交流電圧検出信号として出力す
る一方、該交流電圧によって流れる交流電流を交流電流
検出器４が検出して、これを３相の交流電流検出信号と
して出力する。The three-phase AC voltage is detected by an AC voltage detector 5 and is output as a three-phase AC voltage detection signal, while the AC current detector 4 detects an AC current flowing by the AC voltage. This is output as a three-phase alternating current detection signal.

【００２７】上記出力される３相の交流電圧検出信号を
受け、ＰＬＬ装置６が３相の交流電圧検出信号のうちの
いずれか１相についての交流電圧位相検出信号を出力す
る。Upon receiving the output three-phase AC voltage detection signal, the PLL device 6 outputs an AC voltage phase detection signal for any one of the three-phase AC voltage detection signals.

【００２８】この出力された交流電圧検出信号と上記出
力された交流電流検出信号とを受け、３相／２相変換器
７が、交流電流検出信号（３相分）を、交流電圧位相検
出信号を用いて該交流電圧位相検出信号と同期して回転
するｄ−ｑ座標系に変換し、有効電流成分と無効電流成
分との２成分に分解して、これらを出力する。Upon receiving the output AC voltage detection signal and the output AC current detection signal, the three-phase / two-phase converter 7 converts the AC current detection signal (for three phases) into an AC voltage phase detection signal. Is converted into a dq coordinate system that rotates in synchronization with the AC voltage phase detection signal, is decomposed into two components, an active current component and a reactive current component, and is output.

【００２９】これらの出力を受け、減算器８，９が、交
流電流検出信号の有効電流成分，及び無効電流成分と、
上位の制御系から指令される有効電流指令値，及び無効
電流指令値との差分をそれぞれ算出し、これら算出され
た各差分を、それぞれ、有効電流制御器１０，及び無効
電流制御器１１が増幅して出力する。In response to these outputs, the subtracters 8 and 9 generate an active current component and a reactive current component of the AC current detection signal,
The difference between the active current command value and the reactive current command value commanded from the host control system is calculated, and the calculated current difference is amplified by the active current controller 10 and the reactive current controller 11, respectively. And output.

【００３０】これらの出力を受け、電圧指令値振幅演算
器１７が次の演算を行う。すなわち、有効電流制御器１
０の出力をＶｄ、無効電流制御器１１の出力をＶｑとし
た場合において、√（Ｖｄ2 ＋Ｖｑ2 ）＝Ｖｏを演算す
る。そして、この演算結果Ｖｏを電圧指令値の振幅とし
て出力する。一方、上記出力を受け、電圧指令値位相ず
れ演算器１８が、ｔａｎ-1（Ｖｑ／Ｖｄ）＝△αを演算
し、この演算結果△αを交流電圧の位相との位相ずれと
して出力する。ここで、位相ずれ△αはＰＬＬ装置６か
ら出力されている交流電圧位相検出信号の位相θとの位
相ずれを表す。上記出力と上記ＰＬＬ装置６の出力とを
受け、加算器１９が、交流電圧の位相θと△αとを加算
し、これを電圧指令値の絶対位相として出力する。In response to these outputs, the voltage command value amplitude calculator 17 performs the following calculation. That is, the active current controller 1
When the output of 0 is Vd and the output of the reactive current controller 11 is Vq, √ (Vd 2 + Vq 2 ) = Vo is calculated. Then, the calculation result Vo is output as the amplitude of the voltage command value. On the other hand, receiving the output, the voltage command value phase shift calculator 18 calculates tan -1 (Vq / Vd) =） α, and outputs the calculation result △ α as a phase shift from the phase of the AC voltage. Here, the phase shift Δα represents a phase shift from the phase θ of the AC voltage phase detection signal output from the PLL device 6. Upon receiving the output and the output of the PLL device 6, the adder 19 adds the phases θ and △ α of the AC voltage, and outputs this as the absolute phase of the voltage command value.

【００３１】この出力を受け、位相３相配分器２０が以
下の演算を行う。すなわち、加算器１９の出力である電
圧指令値の絶対位相は３相のうちのいずれか１相のもの
であるので、該電圧指令値の絶対位相と同じ位相のもの
と、これを１２０度進めた位相のものと、これを１２０
度遅らせた位相のものとを生成し、該生成したものを３
相の各相の電圧指令値の位相として出力する。Receiving this output, the phase three-phase distributor 20 performs the following calculation. That is, since the absolute phase of the voltage command value output from the adder 19 is one of the three phases, the absolute phase of the voltage command value is the same as the absolute phase of the voltage command value, and this is advanced by 120 degrees. Phase and this is 120
And a phase delayed by three degrees, and the generated
Output as the phase of the voltage command value of each phase.

【００３２】一方、上記電圧指令値振幅演算器１７の出
力を受け、パルス発生／終了位相演算器２１は、電圧指
令値の振幅Ｖｏを用いて、例えば、従来の技術で述べた
（１），（２），（３）式を演算し、図２(b) に示すよ
うに、中央のパルスのパルス幅θ１、両サイドのパルス
のパルス幅θ２、及びその位置の位相±γを算出し、パ
ルス発生位相として、−γ−（θ2 / ２）、−θ1 /
２、γ−（θ2 / ２）を出力し、また、パルス終了位相
として、−γ＋（θ2 / ２）、θ1 / ２、γ＋（θ2 /
２）を出力する。On the other hand, upon receiving the output of the voltage command value amplitude calculator 17, the pulse generation / termination phase calculator 21 uses the amplitude Vo of the voltage command value, for example, as described in the prior art (1), By calculating the equations (2) and (3), the pulse width θ1 of the center pulse, the pulse width θ2 of the pulses on both sides, and the phase ± γ of the position are calculated as shown in FIG. as the pulse generation phase, -γ- (θ 2/2) , - θ 1 /
2, and outputs the γ- (θ 2/2), also, as the pulse end phase, -γ + (θ 2/2 ), θ 1/2, γ + (θ 2 /
Output 2).

【００３３】この出力と、上記位相３相配分器２０の出
力とを受け、ＰＷＭ制御器２２，２３，２４は、それぞ
れ、パルス発生／終了位相と、電圧指令値の位相とを比
較し、それぞれの電圧指令値の位相においてパルスを発
生／終了すべき位相に至るとゲートパルスを出力する。
この出力されたゲートパルスを受け、自励式電力変換装
置１の各相の制御整流素子がＯＮ／ＯＦＦし、それによ
り、直流側の直流電圧から、図２(b) に示すようなＰＷ
Ｍパルス波形の交流電圧が各相ごとに生成され、交流側
に３相のＰＷＭパルス波形からなる交流電圧が発生す
る。また、ゲートパルスの出力タイミングは、交流電流
の有効分及び無効分について、外部から入力される指令
値に対する出力値の偏差に基づいて決定されるので、交
流電流の有効分及び無効分は、指令値に応じてフィード
バック制御される。Receiving this output and the output of the three-phase distributor 20, the PWM controllers 22, 23, and 24 compare the pulse generation / end phase with the phase of the voltage command value, respectively. When a phase at which a pulse is to be generated / terminated is reached at the phase of the voltage command value, a gate pulse is output.
In response to the output gate pulse, the control rectifiers of each phase of the self-excited power converter 1 are turned ON / OFF, and the DC voltage on the DC side is converted into a PW signal as shown in FIG.
An AC voltage having an M pulse waveform is generated for each phase, and an AC voltage having a three-phase PWM pulse waveform is generated on the AC side. Further, the output timing of the gate pulse is determined based on the deviation of the output value from the command value input from the outside for the effective component and the invalid component of the AC current. Feedback control is performed according to the value.

【００３４】次に、本実施の形態１による効果を図２を
用いて説明する。図２において、従来の三角波キャリア
信号比較ＰＷＭ制御方式による３パルス電圧波形では、
各パルスのパルス幅，及び位置の位相は、図２(a) に示
すようなものとなり、５次、及び７次の高調波を含んだ
ものとなっている。一方、本実施の形態１による３パル
ス電圧波形では、各パルスのパルス幅，及び位置の位相
は、図２(b) に示すようなものとなり、５次、及び７次
の高調波を含まないものとなっている。また、従来の三
角波キャリア信号比較ＰＷＭ制御方式による３パルス電
圧波形では電圧時間積が１．０ｐｕであるのに対し、本
実施の形態１による３パルス電圧波形では、電圧時間積
が０．９３ｐｕとなっている。従って、従来の三角波キ
ャリア信号比較ＰＷＭ制御方式よりも、本実施の形態１
によるＰＷＭ制御方式の方が、高調波特性、電圧時間積
特性ともに優れていることが分かる。Next, the effect of the first embodiment will be described with reference to FIG. In FIG. 2, in a three-pulse voltage waveform according to the conventional triangular wave carrier signal comparison PWM control method,
The pulse width of each pulse and the phase of the position are as shown in FIG. 2A, and include the fifth and seventh harmonics. On the other hand, in the three-pulse voltage waveform according to the first embodiment, the pulse width and the phase of each pulse are as shown in FIG. 2B, and do not include the fifth and seventh harmonics. It has become something. In the three-pulse voltage waveform according to the conventional triangular wave carrier signal comparison PWM control method, the voltage-time product is 1.0 pu, whereas in the three-pulse voltage waveform according to the first embodiment, the voltage-time product is 0.93 pu. Has become. Therefore, the first embodiment is more effective than the conventional triangular wave carrier signal comparison PWM control method.
It can be understood that the PWM control method according to the above is superior in both harmonic characteristics and voltage-time product characteristics.

【００３５】なお、上記の説明では、５次、及び７次の
高調波を含まないようなＰＷＭパルス波形を発生させる
ようにしたが、目的に応じて他のＰＷＭパルス波形を発
生させるようにしても構わない。In the above description, a PWM pulse waveform that does not include the fifth and seventh harmonics is generated. However, another PWM pulse waveform may be generated according to the purpose. No problem.

【００３６】以上のように、本実施の形態１において
は、電圧指令値の有効分と無効分とから電圧指令値の振
幅値と位相とを算出し、その算出した振幅値と位相とに
基づいて交流電圧のＰＷＭパルス波形の各パルスの発生
／終了位相を制御するようにしたので、パルス波形が本
来持つ自由度を生かして目的に応じた最適なＰＷＭパル
ス波形を発生させることができるため、高調波特性改
善、電圧利用率向上、電圧時間積低減、変換器損失低
減、制御性能向上などを図ることができ、その結果、自
励式電力変換装置のコンパクト化、電圧時間積低減によ
る変換装置用変圧器のコンパクト化等を実現することが
できる。As described above, in the first embodiment, the amplitude value and the phase of the voltage command value are calculated from the effective portion and the ineffective portion of the voltage command value, and based on the calculated amplitude value and phase. Since the generation / termination phase of each pulse of the PWM pulse waveform of the AC voltage is controlled in this manner, the optimum PWM pulse waveform according to the purpose can be generated by utilizing the inherent flexibility of the pulse waveform. It can improve harmonic characteristics, improve voltage utilization, reduce voltage-time product, reduce converter loss, and improve control performance. As a result, the self-excited power converter can be made more compact, and the voltage-time product can be reduced. It is possible to realize a compact transformer for use.

【００３７】実施の形態２．図３は本発明の実施の形態
２によるＰＷＭ制御装置を用いた自励式電力変換装置の
構成を示すブロック図である。図において、図１と同一
符号は同一又は相当する部分を示し、本実施の形態２
は、図１のパルス発生／終了位相演算器２１を省略し、
図１のゲートパルスを生成するだけのＰＷＭ制御器２２
〜２４に代えて、図１のパルス発生／終了位相演算器２
１の演算内容を予め計算したテーブルを記憶する記憶手
段（図示せず）を備えたＰＷＭ制御器２５〜２７を有す
る点が実施の形態１と異なるものである。Embodiment 2 FIG. 3 is a block diagram showing a configuration of a self-excited power conversion device using a PWM control device according to Embodiment 2 of the present invention. In the figure, the same reference numerals as those in FIG.
Omits the pulse generation / end phase calculator 21 in FIG.
PWM controller 22 that only generates the gate pulse of FIG.
To 24, the pulse generation / end phase calculator 2 of FIG.
The present embodiment is different from the first embodiment in that it has PWM controllers 25 to 27 each having a storage means (not shown) for storing a table in which the content of operation 1 is calculated in advance.

【００３８】すなわち、ＰＷＭ制御器２５〜２７は、そ
れぞれ、記憶手段を備え、該記憶手段に、電圧指令値の
振幅値Ｖｏに対する３パルス電圧波形の各パルスの発生
位相及び終了位相を表すテーブルを予め記憶しており、
電圧指令値振幅演算器１７から電圧指令値の振幅値が入
力され、位相３相配分器２０から電圧指令値の位相が入
力されると、該入力された電圧指令値の振幅値Ｖｏを、
該記憶しているテーブルと対比して、該算出した電圧指
令値の振幅値Ｖｏに対応する３パルス電圧波形の各パル
スの発生位相及び終了位相を求め、その求めた各パルス
の発生位相及び終了位相と、上記入力された電圧指令値
の位相とを比較し、それぞれの電圧指令値の位相におい
てパルスを発生／終了すべき位相に至るとゲートパルス
を出力するように構成されている。That is, each of the PWM controllers 25 to 27 has a storage means, and the storage means stores a table showing the generation phase and end phase of each pulse of the three-pulse voltage waveform with respect to the amplitude value Vo of the voltage command value. Remembered in advance,
When the amplitude value of the voltage command value is input from the voltage command value amplitude calculator 17 and the phase of the voltage command value is input from the phase three-phase distributor 20, the amplitude value Vo of the input voltage command value is calculated as
Compared with the stored table, the generation phase and end phase of each pulse of the three-pulse voltage waveform corresponding to the calculated amplitude value Vo of the voltage command value are obtained, and the generation phase and end of each obtained pulse are obtained. The phase is compared with the phase of the input voltage command value, and a gate pulse is output when a phase at which a pulse is to be generated / terminated at each voltage command value is reached.

【００３９】このように、本実施の形態２においては、
電圧指令値の振幅値Ｖｏに対する３パルス電圧波形の各
パルスの発生位相及び終了位相を表すテーブルを予め記
憶するようにしたので、ＰＷＭパルス波形の制御信号の
生成処理の高速化を図ることができる。As described above, in the second embodiment,
Since the table indicating the generation phase and the termination phase of each pulse of the three-pulse voltage waveform with respect to the amplitude value Vo of the voltage command value is stored in advance, the processing for generating the control signal of the PWM pulse waveform can be speeded up. .

【００４０】実施の形態３．図４は本発明の実施の形態
３によるＰＷＭ制御装置を用いた自励式電力変換装置の
構成を示すブロック図である。図において、図１と同一
符号は同一又は相当する部分を示し、本実施の形態３
は、図１の電圧指令値振幅演算器１７、電圧指令値位相
ずれ演算器１８、加算器１９、位相３相配分器２０、パ
ルス発生／終了位相演算器２１、及びＰＷＭ制御器２２
〜２４に代えて、２相／３相変換器１２、各相電圧指令
値振幅演算器２８〜３０、各相パルス発生／終了位相演
算器３１〜３３、及びＰＷＭ制御器３４〜３６を有する
点が実施の形態１と異なるものである。Embodiment 3 FIG. 4 is a block diagram showing a configuration of a self-excited power conversion device using a PWM control device according to Embodiment 3 of the present invention. In the figure, the same reference numerals as those in FIG.
Is a voltage command value amplitude calculator 17, a voltage command value phase shift calculator 18, an adder 19, a phase three-phase distributor 20, a pulse generation / termination phase calculator 21, and a PWM controller 22 shown in FIG.
2 to 3 phase converters 12, phase voltage command value amplitude calculators 28 to 30, phase pulse generation / termination phase calculators 31 to 33, and PWM controllers 34 to 36. Are different from the first embodiment.

【００４１】２相／３相変換器１２は、有効電流制御器
１０の出力と無効電流制御器１１の出力とを、自励式電
力変換装置１が実際に発生すべき交流電圧を表す電圧指
令値に変換する。The two-phase / three-phase converter 12 converts the output of the active current controller 10 and the output of the reactive current controller 11 into a voltage command value representing an AC voltage to be actually generated by the self-excited power converter 1. Convert to

【００４２】各相電圧指令値振幅位相演算器２８〜３０
は、２相／３相変換器１２によって変換された各相ごと
の電圧指令値から、各相ごとの振幅値と位相とを算出す
る。Each phase voltage command value amplitude phase calculator 28-30
Calculates the amplitude value and the phase for each phase from the voltage command value for each phase converted by the two-phase / 3-phase converter 12.

【００４３】例えば、電圧指令値を正弦波と仮定すれ
ば、２点のサンプリングデータから振幅値や位相を計算
できる。For example, assuming that the voltage command value is a sine wave, the amplitude value and phase can be calculated from the sampling data at two points.

【００４４】各相パルス発生／終了位相演算器３１〜３
３は、各相電圧指令値振幅位相演算器２８〜３０で各相
ごとに計算された振幅値から、例えば、従来の技術で述
べた（１），（２），（３）式のような計算をして、パ
ルスの発生／終了位相を算出する。Each phase pulse generation / end phase calculator 31-3
Reference numeral 3 denotes, for example, from the amplitude values calculated for each phase by the phase voltage command value amplitude / phase calculators 28 to 30, as in the equations (1), (2), and (3) described in the related art, for example. The calculation is performed to calculate the pulse generation / end phase.

【００４５】ＰＷＭ制御器３４〜３６は、各相電圧指令
値振幅位相演算器２８〜３０で算出された各相ごとの電
圧指令位相値と、各相パルス発生／終了位相演算器３１
〜３３で算出された各相ごとのパルス発生／終了位相と
の比較により、各相ごとにゲートパルスを生成して、こ
れを自励式電力変換装置１の制御整流素子に出力する。The PWM controllers 34 to 36 include a voltage command phase value for each phase calculated by each phase voltage command value amplitude / phase calculator 28 to 30 and a pulse generation / termination phase calculator 31 for each phase.
A gate pulse is generated for each phase by comparison with the pulse generation / termination phase for each phase calculated in steps (33) to (33), and this is output to the control rectifier of the self-excited power converter 1.

【００４６】以上のように、本実施の形態３において
は、各相ごとに独立にＰＷＭパルス波形を計算／制御す
るので、各相ごとに独立にＰＷＭパルス波形を制御する
ことができるため、例えば、交流系統の事故で３相不平
衡状態になっても、最適に対応することができる。As described above, in the third embodiment, since the PWM pulse waveform is calculated and controlled independently for each phase, the PWM pulse waveform can be controlled independently for each phase. Even if a three-phase imbalance occurs due to an AC system accident, it is possible to optimally cope with the situation.

【００４７】実施の形態４．図５は本発明の実施の形態
４によるＰＷＭ制御装置を用いた自励式電力変換装置の
構成を示すブロック図である。図において、図１と同一
符号は同一又は相当する部分を示し、本実施の形態４
は、図１の単独の自励式電力変換装置１に代えて、多重
化された自励式電力変換装置３７，３８を備えるように
した点が実施の形態１と異なるものである。Embodiment 4 FIG. 5 is a block diagram showing a configuration of a self-excited power conversion device using a PWM control device according to Embodiment 4 of the present invention. In the figure, the same reference numerals as those in FIG.
Is different from the first embodiment in that multiplexed self-excited power converters 37 and 38 are provided instead of the single self-excited power converter 1 in FIG.

【００４８】すなわち、第１段の自励式電力変換装置３
７と、第２段の自励式電力変換装置３８とが、その交流
側を変換装置用多重変圧器３９を介して並列に交流系統
に接続されるとともに、その直流側を直接直流系統に接
続され、それにより、多重化されている。That is, the first-stage self-excited power converter 3
7 and a second-stage self-excited power converter 38 whose AC side is connected in parallel to an AC system via a converter multiplex transformer 39 and whose DC side is directly connected to a DC system. , Thereby being multiplexed.

【００４９】４０，４１，４２は、位相３相配分器２０
から出力される各相の電圧指令値の位相を、多重化の段
数（本実施の形態４では２段）に応じて、段ごとに電圧
指令値の位相をシフトさせる多重化用段間位相シフト器
である。Reference numerals 40, 41, and 42 denote the three-phase distributor 20.
Shifts the phase of the voltage command value of each phase output from the multiplexing stage to shift the phase of the voltage command value for each stage according to the number of multiplexing stages (two stages in the fourth embodiment). It is a vessel.

【００５０】４３，４４，４５，４６，４７，４８は、
パルス発生／終了位相演算器２１から出力されるパルス
発生／終了位相と多重化用段間位相シフト器４０〜４２
から出力される段ごとの電圧指令値の位相とを比較し
て、段ごとに各相のゲートパルスを生成して出力するＰ
ＷＭ制御器である。43, 44, 45, 46, 47 and 48 are
Pulse generation / end phase output from pulse generation / end phase calculator 21 and multiplexing inter-stage phase shifters 40 to 42
P which generates and outputs a gate pulse of each phase for each stage by comparing the phase of the voltage command value for each stage output from
It is a WM controller.

【００５１】自励式電力変換装置を多重化して、高調波
低減などを図るために、段間の位相をずらすことは従来
のＰＷＭ制御方式でもキャリア信号の位相をシフトさせ
るなどして行われているが、本実施の形態４において
も、上記多重化用段間位相シフト器４０〜４２により、
各段への電圧指令値の位相をずらすことにより、高調波
低減や制御応答の高速化等の多重化メリットを出そうと
するものである。In order to multiplex the self-excited power converter and reduce harmonics, the phase between the stages is shifted by shifting the phase of the carrier signal in the conventional PWM control system. However, also in the fourth embodiment, the multiplexing inter-stage phase shifters 40 to 42
By shifting the phase of the voltage command value to each stage, multiplexing advantages such as reduction of harmonics and speeding up of control response are obtained.

【００５２】なお、上記の説明では、多重化の段数を２
段として説明したが、３段、４段と段数が増えればそれ
に応じて、各段に多重化用段間位相シフト器を設け、段
ごとにＰＷＭ制御器を追加していけばよく、それによ
り、上記した２段の場合と同じ効果が得られることは明
らかである。In the above description, the number of multiplexing stages is 2
Although the number of stages has been described as three stages, if the number of stages is increased to three or four stages, a multiplexing inter-stage phase shifter may be provided for each stage and a PWM controller may be added for each stage. It is apparent that the same effect as in the case of the two stages described above can be obtained.

【００５３】以上のように、本実施の形態４において
は、自励式電力変換装置を多重化したので、高調波低減
や制御応答の高速化などの多重化によるメリット得るこ
とができる。As described above, in the fourth embodiment, since the self-excited power converter is multiplexed, it is possible to obtain merits by multiplexing such as reduction of harmonics and high-speed control response.

【００５４】実施の形態５．図６は本発明の実施の形態
５によるＰＷＭ制御装置を用いた自励式電力変換装置の
構成を示すブロック図である。図において、図５と同一
符号は同一又は相当する部分を示し、本実施の形態５
は、図５のパルス発生／終了位相演算器２１を省略し、
図５のゲートパルスを生成するだけのＰＷＭ制御器４３
〜４８に代えて、図５のパルス発生／終了位相演算器２
１の演算内容を予め計算したテーブルを記憶する記憶手
段（図示せず）を備えたＰＷＭ制御器４９〜５４を有す
る点が実施の形態４と異なるものである。また、ＰＷＭ
制御器４９〜５４の動作は、テーブルの利用に関しては
実施の形態２のＰＷＭ制御器２５〜２７と同様であり、
ゲートパルスの生成に関しては実施の形態４のＰＷＭ制
御器４３〜４８と同様であるので、その説明を省略す
る。Embodiment 5 FIG. FIG. 6 is a block diagram showing a configuration of a self-excited power conversion device using a PWM control device according to Embodiment 5 of the present invention. In the figure, the same reference numerals as those in FIG.
Omits the pulse generation / end phase calculator 21 in FIG.
The PWM controller 43 which only generates the gate pulse of FIG.
To 48, the pulse generation / end phase calculator 2 in FIG.
The present embodiment differs from the fourth embodiment in that it has PWM controllers 49 to 54 provided with storage means (not shown) for storing a table in which the contents of operation 1 are calculated in advance. In addition, PWM
The operation of the controllers 49 to 54 is similar to that of the PWM controllers 25 to 27 of the second embodiment with respect to the use of the table.
Since the generation of the gate pulse is the same as that of the PWM controllers 43 to 48 of the fourth embodiment, the description is omitted.

【００５５】以上のように、本実施の形態５において
は、多重化された自励式電力変換装置において、電圧指
令値の振幅値Ｖｏに対する３パルス電圧波形の各パルス
の発生位相及び終了位相を表すテーブルを予め記憶する
ようにしたので、多重化によるメリットを得ると同時
に、ＰＷＭパルス波形の制御信号の生成処理の高速化を
図ることができる。As described above, in the fifth embodiment, in the multiplexed self-excited power converter, the generation phase and the termination phase of each pulse of the three-pulse voltage waveform with respect to the amplitude value Vo of the voltage command value are shown. Since the table is stored in advance, the advantage of the multiplexing can be obtained, and the speed of the process of generating the control signal having the PWM pulse waveform can be increased.

【００５６】実施の形態６．図７は本発明の実施の形態
６によるＰＷＭ制御装置を用いた自励式電力変換装置の
構成を示すブロック図である。図において、図４と同一
符号は同一又は相当する部分を示し、本実施の形態６
は、図４の単独の自励式電力変換装置１に代えて、多重
化された自励式電力変換装置３７，３８を備えるように
した点が実施の形態３と異なるものである。Embodiment 6 FIG. FIG. 7 is a block diagram showing a configuration of a self-excited power conversion device using a PWM control device according to Embodiment 6 of the present invention. In the figure, the same reference numerals as those in FIG.
The third embodiment is different from the third embodiment in that multiplexed self-excited power converters 37 and 38 are provided instead of the single self-excited power converter 1 shown in FIG.

【００５７】すなわち、第１段の自励式電力変換装置３
７と、第２段の自励式電力変換装置３８とが、その交流
側を変換装置用多重変圧器３９を介して並列に交流系統
に接続されるとともに、その直流側を直接直流系統に接
続され、それにより、多重化されている。That is, the first-stage self-excited power converter 3
7 and a second-stage self-excited power converter 38 whose AC side is connected in parallel to an AC system via a converter multiplex transformer 39 and whose DC side is directly connected to a DC system. , Thereby being multiplexed.

【００５８】５５，５６，５７は、各相電圧指令値振幅
位相演算器２８〜３０から出力される各相の電圧指令値
の位相を、多重化の段数（本実施の形態６では２段）に
応じて、段ごとに電圧指令値の位相をシフトさせる多重
化用段間位相シフト器である。Reference numerals 55, 56, and 57 denote the phases of the voltage command values of each phase output from the phase voltage command value amplitude / phase calculators 28 to 30 as the number of multiplexing stages (two stages in the sixth embodiment). Is a multiplexing inter-stage phase shifter that shifts the phase of the voltage command value for each stage according to.

【００５９】５８、５９は、Ｕ相用の各相パルス発生／
終了位相演算器３１から出力されるＵ相用のパルス発生
／終了位相と、Ｕ相用の多重化用段間位相シフト器５５
から出力される段ごとの電圧指令値の位相との比較によ
って、段ごとのゲートパルスを生成するＰＷＭ制御器で
ある。Reference numerals 58 and 59 denote each phase pulse generation /
U-phase pulse generation / end phase output from end-phase calculator 31 and U-phase multiplexing interstage phase shifter 55
Is a PWM controller that generates a gate pulse for each stage by comparing the phase of the voltage command value for each stage output from the controller.

【００６０】６０、６１は、Ｖ相用の各相パルス発生／
終了位相演算器３２から出力されるＶ相用のパルス発生
／終了位相と、Ｖ相用の多重化用段間位相シフト器５６
から出力される段ごとの電圧指令値の位相との比較によ
って、段ごとのゲートパルスを生成するＰＷＭ制御器で
ある。Reference numerals 60 and 61 denote each phase pulse generation /
V phase pulse generation / end phase output from end phase calculator 32 and V phase multiplexing interstage phase shifter 56
Is a PWM controller that generates a gate pulse for each stage by comparing the phase of the voltage command value for each stage output from the controller.

【００６１】６２、６３は、Ｗ相用の各相パルス発生／
終了位相演算器３３から出力されるＷ相用のパルス発生
／終了位相と、Ｗ相用の多重化用段間位相シフト器５７
から出力される段ごとの電圧指令値の位相との比較によ
って、段ごとのゲートパルスを生成するＰＷＭ制御器で
ある。Reference numerals 62 and 63 denote each phase pulse generation for the W phase /
W-phase pulse generation / end phase output from end-phase calculator 33 and W-phase multiplexing interstage phase shifter 57
Is a PWM controller that generates a gate pulse for each stage by comparing the phase of the voltage command value for each stage output from the controller.

【００６２】以上のように、本発明の実施の形態６にお
いては、多重化された自励式電力変換装置において、各
相ごとに独立にＰＷＭパルス波形を計算／制御するよう
にしたので、多重化によるメリットを得ると同時に、交
流系統の事故で３相不平衡状態になっても、最適に対応
することができる。As described above, in the sixth embodiment of the present invention, in the multiplexed self-excited power converter, the PWM pulse waveform is calculated / controlled independently for each phase. And at the same time, can optimally cope with a three-phase imbalance caused by an AC system accident.

【００６３】なお、上記実施の形態５〜７では、多重化
の段数を２段として説明したが、３段、４段と段数が増
えればそれに応じて、各段に多重化用段間位相シフト器
を設け、段ごとにＰＷＭ制御器を追加していけばよく、
それにより、上記実施の形態５〜７で２段にした場合と
同じ効果が得られることは明らかである。In the above-described fifth to seventh embodiments, the number of multiplexing stages has been described as two. However, if the number of stages is increased to three, four, or the like, the multiplexing inter-stage phase shift is added to each stage. It is only necessary to add a PWM controller for each stage,
Thus, it is apparent that the same effect as in the case of two stages in Embodiments 5 to 7 can be obtained.

【００６４】また、上記実施の形態１〜７では、自励式
電力変換装置の交流側が３相である場合を説明したが、
３相以外であってもよく、例えば、単相の場合には３相
の場合と同様にして本発明を適用することができる。In the first to seventh embodiments, the case where the AC side of the self-excited power converter has three phases has been described.
The present invention may be applied in a manner other than three phases, for example, in the case of a single phase, similarly to the case of three phases.

【００６５】[0065]

【発明の効果】以上のように、請求項１に係る発明によ
れば、ＰＷＭパルス波形の変調信号たる電圧指令信号の
有効分と無効分とから、電圧指令信号の振幅値と位相と
を算出し、その算出した振幅値に基づいて所定のＰＷＭ
パルス波形の各パルスの始端及び終端の位相を求め、そ
の求めた所定のＰＷＭパルス波形の各パルスの始端及び
終端の位相と上記算出した電圧指令信号の位相とに基づ
いて、自励式電力変換装置におけるＰＷＭパルス波形の
交流電圧を発生させるようにしたので、パルス波形が本
来持つ自由度を生かして目的に応じた最適なＰＷＭパル
ス波形を発生させることができるため、高調波特性改
善、電圧利用率向上、電圧時間積低減、変換器損失低
減、制御性能向上などを図ることができる。As described above, according to the first aspect of the present invention, the amplitude value and the phase of the voltage command signal are calculated from the effective and invalid components of the voltage command signal, which is a modulation signal of the PWM pulse waveform. Then, based on the calculated amplitude value, a predetermined PWM
A self-excited power conversion device is obtained based on the phases of the start and end of each pulse of the pulse waveform and the obtained phases of the start and end of each pulse of the predetermined PWM pulse waveform and the calculated voltage command signal. Since the AC voltage of the PWM pulse waveform in the above is generated, an optimal PWM pulse waveform according to the purpose can be generated by utilizing the inherent flexibility of the pulse waveform. It is possible to improve the rate, reduce the voltage-time product, reduce the converter loss, and improve the control performance.

【００６６】また、請求項２に係る発明によれば、請求
項１の自励式電力変換装置用ＰＷＭ制御装置が、算出し
た振幅値から所定のＰＷＭパルス波形の各パルスの始端
及び終端の位相を演算するパルス発生／終了位相演算器
と、該求めた所定のＰＷＭパルス波形の各パルスの始端
及び終端の位相と上記算出した電圧指令信号の位相とに
基づいて、制御信号を出力するＰＷＭ制御器とを有する
ものとしたので、構成を簡素化することができる。According to the second aspect of the present invention, the PWM control apparatus for a self-excited power converter according to the first aspect determines the phase of the start and end of each pulse of a predetermined PWM pulse waveform from the calculated amplitude value. A pulse generation / end phase calculator for calculating, and a PWM controller for outputting a control signal based on the phase of the start and end of each pulse of the determined predetermined PWM pulse waveform and the phase of the calculated voltage command signal And the configuration can be simplified.

【００６７】また、請求項３に係る発明によれば、請求
項１の発明において、電圧指令信号の振幅値に対する所
定のＰＷＭパルス波形の各パルスの始端及び終端の位相
を表すテーブルを予め記憶し、算出した電圧指令信号の
振幅値をその記憶しているテーブルと対比して所定のＰ
ＷＭパルス波形の各パルスの始端及び終端の位相を求
め、その求めた所定のＰＷＭパルス波形の各パルスの始
端及び終端の位相と算出した電圧指令信号の位相とに基
づいて、自励式電力変換装置におけるＰＷＭパルス波形
の交流電圧を発生させるようにしたので、ＰＷＭパルス
波形の制御信号の生成処理の高速化を図ることができ
る。According to a third aspect of the present invention, in the first aspect of the present invention, a table is stored in advance which indicates the phase of the start and end of each pulse of a predetermined PWM pulse waveform with respect to the amplitude value of the voltage command signal. , The calculated amplitude value of the voltage command signal is compared with a stored table to obtain a predetermined P value.
A self-excited power conversion device is obtained based on the determined start and end phases of each pulse of the WM pulse waveform, and based on the determined start and end phases of each pulse of the predetermined PWM pulse waveform and the calculated voltage command signal phase. Since the AC voltage having the PWM pulse waveform is generated in (1), the speed of the process of generating the control signal having the PWM pulse waveform can be increased.

【００６８】また、請求項４に係る発明によれば、請求
項１の発明において、交流電力が３相交流電力であり、
算出した電圧指令信号の有効分及び無効分を、検出した
３相交流電圧の位相を用いて３相交流の電圧指令信号の
有効分及び無効分に変換し、その変換した３相交流の電
圧指令信号の有効分及び無効分から各相ごとの振幅値と
位相とを算出し、その算出した各相ごとの振幅値に基づ
いて、各相ごとに所定のＰＷＭパルス波形の各パルスの
始端及び終端の位相を求め、その求めた所定のＰＷＭパ
ルス波形の各パルスの始端及び終端の位相と算出した電
圧指令信号の各相ごとの位相とに基づいて、自励式電力
変換装置におけるＰＷＭパルス波形の３相の交流電圧を
発生させるようにしたので、各相ごとに独立にＰＷＭパ
ルス波形を制御することができるため、例えば交流系統
の事故で３相不平衡状態になっても、最適に対応するこ
とができる。According to the invention of claim 4, in the invention of claim 1, the AC power is three-phase AC power,
The calculated valid and invalid components of the voltage command signal are converted into valid and invalid components of the three-phase AC voltage command signal using the phase of the detected three-phase AC voltage, and the converted three-phase AC voltage command is converted. An amplitude value and a phase for each phase are calculated from an effective component and an invalid component of the signal. Based on the calculated amplitude value for each phase, the start and end of each pulse of a predetermined PWM pulse waveform for each phase are calculated. The phase is determined, and the three phases of the PWM pulse waveform in the self-excited power converter are determined based on the determined starting and ending phases of each pulse of the predetermined PWM pulse waveform and the calculated phase of each phase of the voltage command signal. Since the AC voltage is generated, it is possible to independently control the PWM pulse waveform for each phase, so that, for example, even if a three-phase imbalance occurs due to an AC system accident, it is possible to optimally cope with the situation. it can.

【００６９】また、請求項５に係る発明によれば、請求
項１の発明において、多重化された自励式電力変換装置
を有し、算出された電圧指令信号の位相を自励式電力変
換装置の多重化の段数に応じて各段ごとに補正し、求め
た所定のＰＷＭパルス波形の各パルスの始端及び終端の
位相と該各段ごとに補正された電圧指令信号の位相とに
基づいて、各段の自励式電力変換装置におけるＰＷＭパ
ルス波形の交流電圧を発生させるようにしたので、高調
波の低減や制御応答の高速化等を図ることができる。According to a fifth aspect of the present invention, in the first aspect of the present invention, there is provided a multiplexed self-excited power converter, and the calculated phase of the voltage command signal is converted to the self-excited power converter. The correction is performed for each stage according to the number of multiplexing stages, and based on the phases of the start and end of each pulse of the determined predetermined PWM pulse waveform and the phase of the voltage command signal corrected for each stage, Since an AC voltage having a PWM pulse waveform is generated in the self-excited power conversion device of the stage, it is possible to reduce harmonics and speed up the control response.

【００７０】また、請求項６に係る発明によれば、請求
項５の発明において、電圧指令信号の振幅値から所定の
ＰＷＭパルス波形の各パルスの始端及び終端の位相を演
算により求め、その求めた所定のＰＷＭパルス波形の各
パルスの始端及び終端の位相と上記各段ごとに補正され
た電圧指令信号の位相とに基づいて、各段の自励式電力
変換装置におけるＰＷＭパルス波形の交流電圧を発生さ
せるようにしたので、高調波の低減や制御応答の高速化
等を図ることができるとともに、構成を簡素化すること
ができる。According to the invention of claim 6, in the invention of claim 5, the starting and ending phases of each pulse of the predetermined PWM pulse waveform are obtained by calculation from the amplitude value of the voltage command signal. Based on the phases of the start and end of each pulse of the predetermined PWM pulse waveform and the phase of the voltage command signal corrected for each stage, the AC voltage of the PWM pulse waveform in the self-excited power converter of each stage is calculated. Since it is generated, it is possible to reduce harmonics, speed up control response, and the like, and simplify the configuration.

【００７１】また、請求項７に係る発明によれば、請求
項５の発明において、電圧指令信号の振幅値に対する所
定のＰＷＭパルス波形の各パルスの始端及び終端の位相
を表すテーブルを予め記憶し、算出した電圧指令信号の
振幅値をその記憶しているテーブルと対比して所定のＰ
ＷＭパルス波形の各パルスの始端及び終端の位相を求
め、その求めた所定のＰＷＭパルス波形の各パルスの始
端及び終端の位相と各段ごとに補正された電圧指令信号
の位相とに基づいて、各段の自励式電力変換装置におけ
るＰＷＭパルス波形の交流電圧を発生させるようにした
ので、高調波の低減や制御応答の高速化等を図ることが
できるとともに、ＰＷＭパルス波形の制御信号の生成処
理の高速化を図ることができる。According to a seventh aspect of the present invention, in the fifth aspect of the present invention, a table representing the start and end phases of each pulse of a predetermined PWM pulse waveform with respect to the amplitude value of the voltage command signal is stored in advance. , The calculated amplitude value of the voltage command signal is compared with a stored table to obtain a predetermined P value.
The phase of the start and end of each pulse of the WM pulse waveform is obtained, and based on the obtained phase of the start and end of each pulse of the predetermined PWM pulse waveform and the phase of the voltage command signal corrected for each stage, Since an AC voltage having a PWM pulse waveform is generated in each stage of the self-excited power converter, it is possible to reduce harmonics and speed up a control response, and to generate a PWM pulse waveform control signal. Can be speeded up.

【００７２】また、請求項８に係る発明によれば、請求
項５の発明において、多重化された自励式電力変換装置
の交流電力が３相交流電力であり、算出した電圧指令信
号の有効分及び無効分を、検出した３相交流電圧の位相
を用いて３相交流の電圧指令信号の有効分及び無効分に
変換し、その変換した３相交流の電圧指令信号の有効分
及び無効分から各相ごとの振幅値と位相とを算出すると
ともに、その算出された電圧指令信号の位相を自励式電
力変換装置の多重化の段数に応じて各段ごとに補正し、
算出した各相ごとの振幅値に基づいて、各相ごとに所定
のＰＷＭパルス波形の各パルスの始端及び終端の位相を
求め、その求めた所定のＰＷＭパルス波形の各パルスの
始端及び終端の位相と上記各段ごとに補正された電圧指
令信号の各相ごとの位相とに基づいて、各段の自励式電
力変換装置におけるＰＷＭパルス波形の３相の交流電圧
を発生させるようにしたので、高調波の低減や制御応答
の高速化等を図ることができるとともに、交流系統の事
故で３相不平衡状態になっても、最適に対応することが
できる。According to the invention of claim 8, in the invention of claim 5, the AC power of the multiplexed self-excited power converter is three-phase AC power, and the effective component of the calculated voltage command signal is And the ineffective part is converted into an effective part and an ineffective part of the three-phase AC voltage command signal using the detected phase of the three-phase AC voltage, and each of the three-phase AC voltage command signal is converted into an effective part and an ineffective part. While calculating the amplitude value and the phase for each phase, the phase of the calculated voltage command signal is corrected for each stage according to the number of multiplexing stages of the self-excited power converter,
Based on the calculated amplitude value for each phase, the starting and ending phases of each pulse of the predetermined PWM pulse waveform are obtained for each phase, and the starting and ending phases of each pulse of the obtained predetermined PWM pulse waveform are obtained. Since the three-phase AC voltage of the PWM pulse waveform in the self-excited power converter of each stage is generated based on the above and the phase of each phase of the voltage command signal corrected for each stage, Waves can be reduced, control response can be speeded up, and the like, and even if a three-phase unbalanced state occurs due to an AC system accident, it can be optimally dealt with.

【図面の簡単な説明】[Brief description of the drawings]

【図１】 本発明の実施の形態１によるＰＷＭ制御装置
を用いた自励式電力変換装置の構成を示すブロック図で
ある。FIG. 1 is a block diagram showing a configuration of a self-excited power conversion device using a PWM control device according to a first embodiment of the present invention.

【図２】 ＰＷＭパルス波形を示す図であって、従来例
によるＰＷＭパルス波形を示す図(a) 、及び本実施の形
態１によるＰＷＭパルス波形を示す図(b) である。FIGS. 2A and 2B are diagrams showing a PWM pulse waveform, and are a diagram (a) showing a PWM pulse waveform according to a conventional example and a diagram (b) showing a PWM pulse waveform according to the first embodiment.

【図３】 本発明の実施の形態２によるＰＷＭ制御装置
を用いた自励式電力変換装置の構成を示すブロック図で
ある。FIG. 3 is a block diagram showing a configuration of a self-excited power conversion device using a PWM control device according to a second embodiment of the present invention.

【図４】 本発明の実施の形態３によるＰＷＭ制御装置
を用いた自励式電力変換装置の構成を示すブロック図で
ある。FIG. 4 is a block diagram showing a configuration of a self-excited power conversion device using a PWM control device according to a third embodiment of the present invention.

【図５】 本発明の実施の形態４によるＰＷＭ制御装置
を用いた自励式電力変換装置の構成を示すブロック図で
ある。FIG. 5 is a block diagram showing a configuration of a self-excited power conversion device using a PWM control device according to a fourth embodiment of the present invention.

【図６】 本発明の実施の形態５によるＰＷＭ制御装置
を用いた自励式電力変換装置の構成を示すブロック図で
ある。FIG. 6 is a block diagram showing a configuration of a self-excited power conversion device using a PWM control device according to a fifth embodiment of the present invention.

【図７】 本発明の実施の形態６によるＰＷＭ制御装置
を用いた自励式電力変換装置の構成を示すブロック図で
ある。FIG. 7 is a block diagram showing a configuration of a self-excited power conversion device using a PWM control device according to a sixth embodiment of the present invention.

【図８】 従来の自励式電力変換装置の構成を示すブロ
ック図である。FIG. 8 is a block diagram showing a configuration of a conventional self-excited power converter.

【図９】 従来の三角波キャリア信号比較ＰＷＭ制御方
式を示す図であって、制御整流素子からなる単相ブリッ
ジを示す回路図（a)、三角波キャリア信号及び電圧指令
値を示すグラフ図(b) 、及びＰＷＭパルス波形を示すグ
ラフ図（c)である。FIG. 9 is a diagram illustrating a conventional triangular wave carrier signal comparison PWM control method, and is a circuit diagram illustrating a single-phase bridge including a control rectifying element (a), and a graph diagram illustrating a triangular wave carrier signal and a voltage command value (b). , And a graph (c) showing a PWM pulse waveform.

【図１０】 半サイクル中に３パルスを有するＰＷＭパ
ルス波形を一般的な形で表したグラフ図である。FIG. 10 is a graph showing a PWM pulse waveform having three pulses in a half cycle in a general form.

【符号の説明】[Explanation of symbols]

１ 自励式電力変換装置、２ 変換装置用変圧器、３
直流コンデンサ、４ 交流電流検出器、５ 交流電圧検
出器、６ ＰＬＬ装置、７ ３相／２相変換器、８，９
減算器、１０ 有効電流制御器、１１ 無効電流制御
器、１２ ２相／３相変換器、１３ キャリア発生器、
１４〜１６ ＰＷＭ制御器、１７ 電圧指令値振幅演算
器、１８ 電圧指令値位相ずれ演算器、１９ 加算器、
２０ 位相３相配分器、２１ パルス発生／終了位相演
算器、２２〜２７ ＰＷＭ制御器、２８〜３０ 各相電
圧指令値振幅位相演算器、３１〜３３ 各相パルス発生
／終了位相演算器、３４〜３６ ＰＷＭ制御器、３７
第１段の自励式電力変換装置、３８ 第２段の自励式電
力変換装置、３９ 変換装置用多重変圧器、４０〜４２
多重化用段間位相シフト器、４３〜５４ ＰＷＭ制御
器、５５〜５７ 多重化用段間位相シフト器、５８〜６
３ ＰＷＭ制御器、１０１ ＰＷＭ制御装置、１０２
制御整流素子、１０３ 電圧指令値、１０４ 上段用３
パルスキャリア信号、１０５ 下段用３パルスキャリア
信号、１０６ ＰＷＭパルス波形の交流電圧、Ｔ１，Ｔ
２ 出力端子。1 self-excited power converter, 2 transformer for converter, 3
DC capacitor, 4 AC current detector, 5 AC voltage detector, 6 PLL device, 7 3-phase / 2-phase converter, 8, 9
Subtractor, 10 Active current controller, 11 Reactive current controller, 12 2-phase / 3-phase converter, 13 Carrier generator,
14 to 16 PWM controller, 17 voltage command value amplitude calculator, 18 voltage command value phase shift calculator, 19 adder,
Reference Signs List 20 phase three-phase distributor, 21 pulse generation / end phase calculator, 22-27 PWM controller, 28-30 each phase voltage command value amplitude phase calculator, 31-33 each phase pulse generation / end phase calculator, 34 ~ 36 PWM controller, 37
First-stage self-excited power converter, 38 Second-stage self-excited power converter, 39 Multiplexer for converter, 40 to 42
Multiplexing interstage phase shifter, 43-54 PWM controller, 55-57 Multiplexing interstage phase shifter, 58-6
3 PWM controller, 101 PWM controller, 102
Control rectifier, 103 Voltage command value, 104 Upper stage 3
Pulse carrier signal, 105 Lower three-pulse carrier signal, 106 PWM pulse waveform AC voltage, T1, T
2 Output terminal.

Claims (8)

【特許請求の範囲】[Claims] 【請求項１】 制御信号に応じてＯＮ／ＯＦＦして、直
流電圧からパルス波形の交流電圧を発生する自励式電力
変換装置に用いられ、 上記発生する交流電圧の位相と該交流電圧に基づいて流
れる交流電流の値とを検出し、該検出した交流電圧の位
相及び交流電流の値から該交流電圧の位相と同期した２
軸の回転座標系での交流電流の有効分及び無効分を算出
し、該算出した交流電流の有効分及び無効分と外部から
入力される上記交流電流の有効分及び無効分に対する指
令値とに基づいて上記制御信号を出力することにより、
上記自励式電力変換装置にＰＷＭパルス波形の交流電圧
を発生させて、上記交流電流の有効分及び無効分を制御
するＰＷＭ制御装置において、 上記算出した交流電流の有効分及び無効分と上記外部か
ら入力される交流電流の有効分及び無効分に対する指令
値とに基づいて、上記発生させるＰＷＭパルス波形の交
流電圧の変調信号たる電圧指令信号の有効分と無効分と
を算出し、該算出した電圧指令信号の有効分と無効分と
から、該電圧指令信号の振幅値と位相とを算出し、該算
出した振幅値に基づいて所定のＰＷＭパルス波形の各パ
ルスの始端及び終端の位相を求め、該求めた所定のＰＷ
Ｍパルス波形の各パルスの始端及び終端の位相と上記算
出した電圧指令信号の位相とに基づいて、上記制御信号
を出力するようにしたことを特徴とする自励式電力変換
装置用ＰＷＭ制御装置。1. A self-excited power converter that generates an AC voltage having a pulse waveform from a DC voltage by turning ON / OFF in response to a control signal, based on the phase of the generated AC voltage and the AC voltage. The value of the flowing AC current is detected, and the phase of the AC voltage synchronized with the phase of the AC voltage is determined based on the detected phase of the AC voltage and the value of the AC current.
The effective and ineffective components of the alternating current in the rotating coordinate system of the shaft are calculated, and the calculated effective and ineffective components of the alternating current and the command values for the effective and ineffective components of the alternating current input from the outside are calculated. By outputting the control signal based on the
A PWM controller that generates an AC voltage having a PWM pulse waveform in the self-excited power converter and controls an effective component and an inactive component of the AC current. Based on the input values of the effective component and the invalid component of the alternating current, the effective component and the invalid component of the voltage command signal, which is the modulation signal of the AC voltage of the generated PWM pulse waveform, are calculated, and the calculated voltage is calculated. From the effective component and the invalid component of the command signal, the amplitude value and the phase of the voltage command signal are calculated, and the start and end phases of each pulse of the predetermined PWM pulse waveform are calculated based on the calculated amplitude value. The determined predetermined PW
A PWM control device for a self-excited power converter, wherein the control signal is output based on the phases of the start and end of each pulse of the M pulse waveform and the phase of the calculated voltage command signal. 【請求項２】 請求項１に記載の自励式電力変換装置用
ＰＷＭ制御装置は、 上記算出した振幅値から所定のＰＷＭパルス波形の各パ
ルスの始端及び終端の位相を演算するパルス発生／終了
位相演算器と、該求めた所定のＰＷＭパルス波形の各パ
ルスの始端及び終端の位相と上記算出した電圧指令信号
の位相とに基づいて、上記制御信号を出力するＰＷＭ制
御器とを有するものであることを特徴とする自励式電力
変換装置用ＰＷＭ制御装置。2. The PWM control device for a self-excited power conversion device according to claim 1, wherein a pulse generation / end phase for calculating a start end and an end phase of each pulse of a predetermined PWM pulse waveform from the calculated amplitude value. An arithmetic unit, and a PWM controller that outputs the control signal based on the phases of the start and end of each pulse of the determined predetermined PWM pulse waveform and the calculated phase of the voltage command signal. A PWM control device for a self-excited power conversion device, characterized in that: 【請求項３】 請求項１に記載の自励式電力変換装置用
ＰＷＭ制御装置において、 上記電圧指令信号の振幅値に対する所定のＰＷＭパルス
波形の各パルスの始端及び終端の位相を表すテーブルを
予め記憶し、上記算出した電圧指令信号の振幅値を該記
憶したテーブルと対比して所定のＰＷＭパルス波形の各
パルスの始端及び終端の位相を求め、該求めた所定のＰ
ＷＭパルス波形の各パルスの始端及び終端の位相と上記
算出した電圧指令信号の位相とに基づいて、上記制御信
号を出力するようにしたことを特徴とする自励式電力変
換装置用ＰＷＭ制御装置。3. The PWM control device for a self-excited power conversion device according to claim 1, wherein a table is stored in advance that indicates the phase of the start and end of each pulse of a predetermined PWM pulse waveform with respect to the amplitude value of the voltage command signal. Then, by comparing the calculated amplitude value of the voltage command signal with the stored table, the starting and ending phases of each pulse of a predetermined PWM pulse waveform are obtained, and the obtained predetermined P
A PWM control device for a self-excited power converter, wherein the control signal is output based on the phases of the start and end of each pulse of a WM pulse waveform and the calculated phase of the voltage command signal. 【請求項４】 請求項１に記載の自励式電力変換装置用
ＰＷＭ制御装置において、 上記自励式電力変換装置は３相の制御信号に応じて３相
交流電圧を発生するものであり、 上記算出した電圧指令信号の有効分及び無効分を、検出
した３相交流電圧の位相を用いて３相交流の電圧指令信
号の有効分及び無効分に変換し、 該変換した３相交流の電圧指令信号の有効分及び無効分
から各相ごとの振幅値と位相とを算出し、該算出した各
相ごとの振幅値に基づいて、各相ごとに所定のＰＷＭパ
ルス波形の各パルスの始端及び終端の位相を求め、該求
めた所定のＰＷＭパルス波形の各パルスの始端及び終端
の位相と上記算出した電圧指令信号の各相ごとの位相と
に基づいて、上記３相の制御信号を出力するようにした
ことを特徴とする自励式電力変換装置用ＰＷＭ制御装
置。4. The PWM control device for a self-excited power converter according to claim 1, wherein the self-excited power converter generates a three-phase AC voltage in accordance with a three-phase control signal. The valid and invalid components of the detected voltage command signal are converted into the valid and invalid components of the three-phase AC voltage command signal using the phase of the detected three-phase AC voltage, and the converted three-phase AC voltage command signal is converted. Calculate the amplitude value and the phase of each phase from the effective component and the invalid component of the above, and, based on the calculated amplitude value of each phase, calculate the phase at the beginning and end of each pulse of a predetermined PWM pulse waveform for each phase. And the three-phase control signal is output based on the obtained start and end phases of each pulse of the predetermined PWM pulse waveform and the calculated phase of each voltage command signal. Self-excited power converter Installation PWM control device. 【請求項５】 請求項１に記載の自励式電力変換装置用
ＰＷＭ制御装置において、 上記自励式電力変換装置を２以上多重化して有し、 上記算出された電圧指令信号の位相を上記自励式電力変
換装置の多重化の段数に応じて各段ごとに補正し、上記
求めた所定のＰＷＭパルス波形の各パルスの始端及び終
端の位相と該各段ごとに補正された電圧指令信号の位相
とに基づいて、各段の自励式電力変換装置に上記制御信
号を出力するようにしたことを特徴とする自励式電力変
換装置用ＰＷＭ制御装置。5. The PWM control device for a self-excited power conversion device according to claim 1, wherein the self-excited power conversion device has two or more multiplexed power conversion devices, and the calculated phase of the voltage command signal is the self-excited power conversion device. Correction is made for each stage according to the number of multiplexing stages of the power conversion device, and the starting and ending phases of each pulse of the predetermined PWM pulse waveform obtained above and the phase of the voltage command signal corrected for each stage are A PWM control device for a self-excited power converter, wherein the control signal is output to the self-excited power converter of each stage based on the following. 【請求項６】 請求項５に記載の自励式電力変換装置用
ＰＷＭ制御装置において、 上記算出した振幅値から所定のＰＷＭパルス波形の各パ
ルスの始端及び終端の位相を演算により求め、該求めた
所定のＰＷＭパルス波形の各パルスの始端及び終端の位
相と上記各段ごとに補正された電圧指令信号の位相とに
基づいて、各段の自励式電力変換装置に上記制御信号を
出力するようにしたことを特徴とする自励式電力変換装
置用ＰＷＭ制御装置。6. The PWM control device for a self-excited power converter according to claim 5, wherein the starting and ending phases of each pulse of a predetermined PWM pulse waveform are calculated from the calculated amplitude value. Outputting the control signal to the self-excited power converter of each stage based on the phase of the start and end of each pulse of the predetermined PWM pulse waveform and the phase of the voltage command signal corrected for each stage. A PWM control device for a self-excited power conversion device, comprising: 【請求項７】 請求項５に記載の自励式電力変換装置用
ＰＷＭ制御装置において、 上記電圧指令信号の振幅値に対する所定のＰＷＭパルス
波形の各パルスの始端及び終端の位相を表すテーブルを
予め記憶し、上記算出した電圧指令信号の振幅値を該記
憶しているテーブルと対比して所定のＰＷＭパルス波形
の各パルスの始端及び終端の位相を求め、該求めた所定
のＰＷＭパルス波形の各パルスの始端及び終端の位相と
上記各段ごとに補正された電圧指令信号の位相とに基づ
いて、各段の自励式電力変換装置に上記制御信号を出力
するようにしたことを特徴とする自励式電力変換装置用
ＰＷＭ制御装置。7. The PWM control device for a self-excited power conversion device according to claim 5, wherein a table representing the phase of the start and end of each pulse of a predetermined PWM pulse waveform with respect to the amplitude value of the voltage command signal is stored in advance. Then, by comparing the calculated amplitude value of the voltage command signal with the stored table, the starting and ending phases of each pulse of the predetermined PWM pulse waveform are obtained, and each pulse of the obtained predetermined PWM pulse waveform is obtained. Based on the phases of the start end and the end and the phase of the voltage command signal corrected for each of the stages, outputting the control signal to the self-excited power converter of each stage. PWM control device for power converter. 【請求項８】 請求項５に記載の自励式電力変換装置用
ＰＷＭ制御装置において、 上記多重化された自励式電力変換装置は３相の制御信号
に応じて３相交流電圧を発生するものであり、 上記算出した電圧指令信号の有効分及び無効分を、検出
した３相交流電圧の位相を用いて３相交流の電圧指令信
号の有効分及び無効分に変換し、 該変換した３相交流の電圧指令信号の有効分及び無効分
から各相ごとの振幅値と位相とを算出するとともに、該
算出された電圧指令信号の位相を上記自励式電力変換装
置の多重化の段数に応じて各段ごとに補正し、上記算出
した各相ごとの振幅値に基づいて、各相ごとに所定のＰ
ＷＭパルス波形の各パルスの始端及び終端の位相を求
め、該求めた所定のＰＷＭパルス波形の各パルスの始端
及び終端の位相と上記各段ごとに補正された電圧指令信
号の各相ごとの位相とに基づいて、各段の自励式電力変
換装置に上記３相の制御信号を出力するようにしたこと
を特徴とする自励式電力変換装置用ＰＷＭ制御装置。8. The PWM controller for a self-excited power converter according to claim 5, wherein the multiplexed self-excited power converter generates a three-phase AC voltage according to a three-phase control signal. And converting the valid and invalid components of the calculated voltage command signal into valid and invalid components of the three-phase AC voltage command signal using the phase of the detected three-phase AC voltage. Calculate the amplitude value and phase of each phase from the effective component and the invalid component of the voltage command signal, and calculate the phase of the calculated voltage command signal according to the number of multiplexing stages of the self-excited power converter. Is corrected for each phase, and based on the calculated amplitude value for each phase, a predetermined P
The phase of the start and end of each pulse of the WM pulse waveform is obtained, and the phase of the start and end of each pulse of the predetermined PWM pulse waveform and the phase of each voltage command signal corrected for each stage are obtained. Wherein the three-phase control signal is output to the self-excited power converter of each stage based on the above.
JP24854898A 1998-09-02 1998-09-02 PWM controller for self-excited power converter Expired - Lifetime JP3598308B2 (en)

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JP2000083386A true JP2000083386A (en) 2000-03-21
JP3598308B2 JP3598308B2 (en) 2004-12-08

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Publication number Priority date Publication date Assignee Title
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JP2017016556A (en) * 2015-07-06 2017-01-19 東芝三菱電機産業システム株式会社 Self-excited power conversion device
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004173340A (en) * 2002-11-18 2004-06-17 Mitsubishi Electric Corp Control system for synchronous motor
US7075274B2 (en) 2004-08-27 2006-07-11 Toshiba Mitsubishi-Electric Industrial Systems Corporation Reactive power compensator
JP2012085500A (en) * 2010-10-15 2012-04-26 Mitsubishi Electric Corp Reactive power compensation device
JP2017016556A (en) * 2015-07-06 2017-01-19 東芝三菱電機産業システム株式会社 Self-excited power conversion device
CN110892635A (en) * 2017-07-21 2020-03-17 罗伯特·博世有限公司 Electric machine
CN110892635B (en) * 2017-07-21 2023-03-03 罗伯特·博世有限公司 Electrical machine

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