JPH03243171A - Power conversion device - Google Patents
Power conversion deviceInfo
- Publication number
- JPH03243171A JPH03243171A JP2037713A JP3771390A JPH03243171A JP H03243171 A JPH03243171 A JP H03243171A JP 2037713 A JP2037713 A JP 2037713A JP 3771390 A JP3771390 A JP 3771390A JP H03243171 A JPH03243171 A JP H03243171A
- Authority
- JP
- Japan
- Prior art keywords
- output
- inverter
- current
- component
- current detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 title claims description 5
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 239000003990 capacitor Substances 0.000 claims abstract description 15
- 230000005284 excitation Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、所謂無停ｉｔ電源装置どに使用される電力変
換装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a power conversion device used in so-called uninterruptible IT power supplies.
（口〉 従来の技術
昭和６１手電気学会全国大会講演論文集〔６〕５１３「
無停＄電源装置における出力歪率低減制御方法」には、
第２図の如き装置が示されている。(Talking) Conventional technology 1986 IEEJ National Conference Lecture Proceedings [6] 513
``Output distortion reduction control method in uninterruptible $ power supply equipment''
A device such as that shown in FIG. 2 is shown.
ここで、１は商用交流電源、２は商用交流電源１に接続
された整流器、３は二次電池、４は整流器２の出力によ
り二次電池３を充電すると共に、商用交流電源１の停電
時には後述するインバータに二次電池３の出力を供給す
る充放電回路、５は平滑コンデンサである。そして、整
流器２、二次電池３、充放電回路４、平滑コンデンサ５
によって直流電源６が構成される。Here, 1 is a commercial AC power supply, 2 is a rectifier connected to the commercial AC power supply 1, 3 is a secondary battery, and 4 is a secondary battery 3 charged by the output of the rectifier 2, and when the commercial AC power supply 1 is out of power. A charging/discharging circuit 5 is a smoothing capacitor that supplies the output of the secondary battery 3 to an inverter to be described later. Then, a rectifier 2, a secondary battery 3, a charging/discharging circuit 4, a smoothing capacitor 5
A DC power supply 6 is configured.
７は直流電源６の出力を交流に変換するインバータ、８
はインバータ７の出力側に接続された出力トランス、９
は出力トランス８の二次側に接続されその出力トランス
８を介してインバータ７に接続されたフィルター用の出
力コンデンサ、ＩＯは出力トランス８の二次側に接続さ
れた負荷である。１１は出力コンデンサ９に流れる電流
を検出する電流検出部、１２は基準となる正弦波信号を
発生する基準波発生回路、１３は基準波発生回路１２が
発生する正弦波信号を基準として電流検山部１１の検出
信号に応じた制御信号を出力する電流制御回路、１４は
電流制御回路１３が出力する制御信号に応じたＰＷＭ信
号を出力し、インバータ７を制御するＰＷＭ発生回路で
ある。7 is an inverter that converts the output of the DC power supply 6 into AC; 8
is an output transformer connected to the output side of inverter 7, 9
is a filter output capacitor connected to the secondary side of the output transformer 8 and connected to the inverter 7 via the output transformer 8, and IO is a load connected to the secondary side of the output transformer 8. 11 is a current detection unit that detects the current flowing to the output capacitor 9; 12 is a reference wave generation circuit that generates a reference sine wave signal; and 13 is a current detection unit using the sine wave signal generated by the reference wave generation circuit 12 as a reference. A current control circuit outputs a control signal according to the detection signal of the section 11, and a PWM generation circuit 14 outputs a PWM signal according to the control signal output from the current control circuit 13 to control the inverter 7.
而して、インバータ７は、出力コンデンサ９に流れる電
流が正弦波となるように、電流検出部１１の検出信号と
基準波発生回路１２が発生する正弦波信号とを比較して
駆動制御される。かかる構成によれば、出力コンデンサ
９の電流にリップル分が含まれていても、それが平均的
に正弦波状に制御されていれば、その積分値に相当する
出力電圧はリップル分の少ない正弦波状となる。The inverter 7 is driven and controlled by comparing the detection signal of the current detection section 11 with the sine wave signal generated by the reference wave generation circuit 12 so that the current flowing to the output capacitor 9 becomes a sine wave. . According to this configuration, even if the current of the output capacitor 9 includes a ripple component, if it is controlled to have a sine wave shape on average, the output voltage corresponding to the integral value will have a sine wave shape with less ripple component. becomes.
しかしながら、かかる槽底において、電流検出部１１．
電流制御回路１３などの電流フィードバックループに直
流オフセットが乗ってしまった場合、インバータ７の出
力に直流成分が重畳されてしまう。かかる事態が生じる
と、出力トランス８が偏励磁されてしまい、出力波形が
歪んでしまうという問題がある。However, in such a tank bottom, the current detection unit 11.
If a DC offset is added to a current feedback loop such as the current control circuit 13, a DC component will be superimposed on the output of the inverter 7. When such a situation occurs, there is a problem that the output transformer 8 is biased and the output waveform is distorted.
（ハ）発明が解決しようとする課題
本発明は、出力トランスの偏励磁を防止し、歪みの少な
い出力が得られる電力変換装置を提供するものである。(c) Problems to be Solved by the Invention The present invention provides a power conversion device that prevents biased excitation of an output transformer and provides an output with less distortion.
（ニ）課題を解決するための手段
本発明電力変換装置は、直流電源に接続されるインバー
タと、該インバータの出力側に接続された出力トランス
と、前記インバータの出力側に接続された出力コンデン
サと、該出力コンデンサの電流を検出する電流検出部と
、前記インバータの出力の直流成分を検出する直流検出
部と、該直流検出部及び前記電流検出部の検出結果に応
じて前記インバータを制御する制御部とよりなることを
特徴とする。(d) Means for Solving the Problems The power conversion device of the present invention includes an inverter connected to a DC power supply, an output transformer connected to the output side of the inverter, and an output capacitor connected to the output side of the inverter. a current detection unit that detects the current of the output capacitor; a DC detection unit that detects a DC component of the output of the inverter; and a current detection unit that controls the inverter according to the detection results of the DC detection unit and the current detection unit. It is characterized by consisting of a control section.
（ホ）作用
通常は、電流検出部による出力コンデンサの電流検知結
果によりインバータが制御され、歪みの少ない波形が負
荷に供給される。何らかの原因で電流フィードバックル
ープに直流オフセットが乗ってしまった場合においても
、インバータの出力に直流成分が出力されると、かかる
直流成分は直流検出部によって検出され、出力の直流成
分を抑制するようにインバータが制御される。(E) Effect Normally, the inverter is controlled based on the current detection result of the output capacitor by the current detection section, and a waveform with less distortion is supplied to the load. Even if a DC offset is added to the current feedback loop for some reason, if a DC component is output from the inverter, the DC component will be detected by the DC detection section, and the DC component of the output will be suppressed. The inverter is controlled.
（へ）実施例
第１図は本発明電力変換装置の一実施例である無停止を
電源装置をしめす。ここでは、先に説明した従来例と同
一の部分には同一符号を付し、説明は省略する。(F) Embodiment FIG. 1 shows a non-stop power supply device which is an embodiment of the power converter of the present invention. Here, the same parts as in the conventional example described above are given the same reference numerals, and the description thereof will be omitted.
１５はインバータ７の出力電流中の直流成分を検出する
直流検出部で、電流制御回路１３とＰＷＭ発生回路１４
とよりなり、電流フィードバックループを槽底する制御
部は、電流検出部１１、基準波発生回路１２及び直流検
出部１５からの信号に応じてインバータの動作を制御す
る。15 is a DC detection unit that detects the DC component in the output current of the inverter 7, which includes a current control circuit 13 and a PWM generation circuit 14;
Therefore, the control section that controls the current feedback loop controls the operation of the inverter according to signals from the current detection section 11, the reference wave generation circuit 12, and the DC detection section 15.
而して、通常は電流検出部１１による出力コンデンサ９
の電流検出結果によりインバータ７が制御され、歪みの
少ない波形が負荷１０に供給される。Therefore, normally the output capacitor 9 by the current detection section 11
The inverter 7 is controlled based on the current detection result, and a waveform with less distortion is supplied to the load 10.
何らかの原因で電流フィードバックループに直流オフセ
ットが乗ってしまい、インバータ７の出力に直流成分が
現れると、かかる直流成分は直流検出部１５によって検
知され、検出結果が電流制御回路１３に帰還されて、出
力の直流成分を抑制するようにインバータ７が制御され
る。When a DC offset is added to the current feedback loop for some reason and a DC component appears in the output of the inverter 7, the DC component is detected by the DC detection section 15, the detection result is fed back to the current control circuit 13, and the output is The inverter 7 is controlled so as to suppress the DC component.
尚、本実施例では直流電源６を商用交流電源１、二次電
池３などから槽底したが、例えば太陽電池や燃料電池を
用いてもよい。In this embodiment, the DC power source 6 is the commercial AC power source 1, the secondary battery 3, etc. at the bottom of the tank, but for example, a solar cell or a fuel cell may be used.
（ト）発明の効果
本発明によれば、電流フィードバックループに直流オフ
セットが乗ってしまっても、インバータの出力に直流成
分が出力されると、かかる直流成分は直流検出部によっ
て検出され、出力の直流成分を抑制するようにインバー
タが制御されるので、出力トランスの偏励磁が防止され
、歪みの少ない出力が得られる電力変換装置が提供でき
る。(g) Effects of the Invention According to the present invention, even if a DC offset is added to the current feedback loop, when a DC component is output to the output of the inverter, the DC component is detected by the DC detection section and the output is Since the inverter is controlled so as to suppress the DC component, biased excitation of the output transformer is prevented, and a power converter device that provides output with less distortion can be provided.
第１図は本発明の一実施例を示す回路系統図、第２図は
従来例を示す回路系統図である。
６・・・直流電源、７・・・インバータ、８・・・出力
トランス、９・・・出力コンデンサ、１１・・・電流検
出部、１５・・・直流検出部。FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional example. 6... DC power supply, 7... Inverter, 8... Output transformer, 9... Output capacitor, 11... Current detection section, 15... DC detection section.
Claims (1)
タの出力側に接続された出力トランスと、前記インバー
タの出力側に接続された出力コンデンサと、該出力コン
デンサの電流を検出する電流検出部と、前記インバータ
の出力の直流成分を検出する直流検出部と、該直流検出
部及び前記電流検出部の検出結果に応じて前記インバー
タを制御する制御部とよりなることを特徴とする電力変
換装置。(1) An inverter connected to a DC power supply, an output transformer connected to the output side of the inverter, an output capacitor connected to the output side of the inverter, and a current detection section that detects the current of the output capacitor. A power conversion device comprising: a DC detection section that detects a DC component of the output of the inverter; and a control section that controls the inverter according to the detection results of the DC detection section and the current detection section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2037713A JPH03243171A (en) | 1990-02-19 | 1990-02-19 | Power conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2037713A JPH03243171A (en) | 1990-02-19 | 1990-02-19 | Power conversion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03243171A true JPH03243171A (en) | 1991-10-30 |
Family
ID=12505159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2037713A Pending JPH03243171A (en) | 1990-02-19 | 1990-02-19 | Power conversion device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03243171A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612413A (en) * | 2017-07-28 | 2018-01-19 | 许继电气股份有限公司 | One kind exchange superposition dc source generating means |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62178175A (en) * | 1986-01-29 | 1987-08-05 | Toshiba Corp | Ac power unit |
| JPS63198581A (en) * | 1987-02-12 | 1988-08-17 | Mitsubishi Electric Corp | Dc component corrector for inverter output voltage |
-
1990
- 1990-02-19 JP JP2037713A patent/JPH03243171A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62178175A (en) * | 1986-01-29 | 1987-08-05 | Toshiba Corp | Ac power unit |
| JPS63198581A (en) * | 1987-02-12 | 1988-08-17 | Mitsubishi Electric Corp | Dc component corrector for inverter output voltage |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612413A (en) * | 2017-07-28 | 2018-01-19 | 许继电气股份有限公司 | One kind exchange superposition dc source generating means |
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