JPS6154877A - Controlling method of inverter - Google Patents
Controlling method of inverterInfo
- Publication number
- JPS6154877A JPS6154877A JP59176072A JP17607284A JPS6154877A JP S6154877 A JPS6154877 A JP S6154877A JP 59176072 A JP59176072 A JP 59176072A JP 17607284 A JP17607284 A JP 17607284A JP S6154877 A JPS6154877 A JP S6154877A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- pulse train
- control
- controller
- rom
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
Description
【発明の詳細な説明】 〔発明の技術分野〕 この発明は、インバータの制御方法に関する。[Detailed description of the invention] [Technical field of invention] The present invention relates to an inverter control method.
第1図は、従来のPWM方式のインバータ装置の基本ブ
ロック図である。同図において、1は直流電源、2はイ
ンバータ、3は3相誘導電動機の如きインバータ負荷、
4は制御装置で、変調波発生回路5と1股送波発生回路
6及び比較回路7を具えている。比較回路7は、第2図
に示す如く、変調波Aと搬送波Bとを比較し、前者が後
者より大なる期間に出力し、斜線を施したパルス列Cu
をインバータ2の対応する相のスイッチング素子に点弧
信号として供給する。パルス列CVは上記パルス列Cu
と120度位相のずれた他相のパルス列で、波形Euv
はインバータが出力する線間電圧を示し、この波形Eu
vをフーリエ展開した波形をFで示しである。この変調
波Aは制御人力りに対応してその波高値が制御され、例
えば、該波高値が小さくなると、第3図に示す如く、イ
ンバータ負荷3に供給されるインバータの出力電圧gu
vは低下する。FIG. 1 is a basic block diagram of a conventional PWM type inverter device. In the figure, 1 is a DC power supply, 2 is an inverter, 3 is an inverter load such as a three-phase induction motor,
Reference numeral 4 denotes a control device, which includes a modulated wave generation circuit 5, a one-prong transmission wave generation circuit 6, and a comparison circuit 7. As shown in FIG. 2, the comparison circuit 7 compares the modulated wave A and the carrier wave B, and determines that the former is output during a longer period than the latter, and the pulse train Cu shown with diagonal lines is
is supplied to the switching element of the corresponding phase of the inverter 2 as an ignition signal. The pulse train CV is the above pulse train Cu.
A pulse train of another phase with a phase shift of 120 degrees from the waveform Euv
represents the line voltage output by the inverter, and this waveform Eu
The waveform obtained by Fourier expansion of v is indicated by F. The peak value of this modulated wave A is controlled in response to the control input. For example, when the peak value becomes small, the output voltage gu of the inverter supplied to the inverter load 3 increases as shown in FIG.
v decreases.
このようにしてインバータの制御動作が行われるが、第
1図の従来のものでは、変調波発生回路、搬送波発生回
路、比較回路等を必要とし、特にインバータが多相イン
バータになると、相数分だけの変調波発生回路が必要と
なり、制御装置の価格が高くなると云う欠点があった。The control operation of the inverter is performed in this way, but the conventional control shown in Figure 1 requires a modulation wave generation circuit, a carrier wave generation circuit, a comparator circuit, etc. Especially when the inverter becomes a multi-phase inverter, This method has the disadvantage that only one modulated wave generation circuit is required, which increases the cost of the control device.
この発明は上記した従来の欠点を除去する為になされた
もので、前記した被変調波パルス列を予めデータ化して
記憶させたROMを設け、制御入力によりこれに対応す
るデータを読出させてスイッチング素子を制御する構成
とすることにより、従来に比し、制御装置を簡素化して
製作費を大幅に低減することがで、また、信頼性を高め
ることができるインバータの制御方法を提案するもので
ある。This invention was made to eliminate the above-mentioned conventional drawbacks, and includes a ROM in which the above-described modulated wave pulse train is converted into data and stored in advance, and data corresponding to this is read out by a control input to drive a switching element. This paper proposes an inverter control method that simplifies the control device and significantly reduces manufacturing costs compared to conventional methods, and also improves reliability. .
以下、この発明の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第4図において、8はリード・オン・メモリ (ROM
)であって、前記したパルス列Cu XCv及び該パル
ス列Cuと240度位相のずれたパルス列Cwがデータ
化して内蔵され、制御人力りの入力値に対応するデータ
が読出されるようにプログラムされている。In Figure 4, 8 is a read-on memory (ROM
), the pulse train Cu .
ROM8にデータ化して内蔵されているパルス列Cu
−、CV 、Cwは、それぞれ、インバータ出力の最高
出力を与えるパルス列、最低出力を与えるパルス列を含
む複数のパルス列であって(その一つを第5図に示す)
、制御入力の入力値に対して予め対応づけされている。Pulse train Cu stored as data in ROM8
-, CV, and Cw are a plurality of pulse trains including a pulse train that gives the highest output of the inverter and a pulse train that gives the lowest output (one of them is shown in FIG. 5).
, are associated in advance with the input values of the control inputs.
このように、本実施例は、従来の制御装置における変調
波発生回路、搬送波発生回路及び比較回路に代えてRO
M8を使用し、変調波と搬送波の比較動作を行わせるこ
となくパルス列点弧信号を発生させるようにしたもので
あるから、制御装置は簡素化される。In this way, the present embodiment replaces the modulated wave generation circuit, carrier wave generation circuit, and comparison circuit in the conventional control device with an RO
Since the M8 is used to generate a pulse train firing signal without performing a comparison operation between a modulated wave and a carrier wave, the control device is simplified.
なお、上記実施例では、正弦波PWMについて説明した
が、本発明は等間隔PWMの場合に適用して同様の効果
を得ることができる。Although the above embodiments have been described with respect to sine wave PWM, the present invention can be applied to equally spaced PWM to obtain similar effects.
この発明は以上説明した通り、制御入力に対応して変調
動作を行わせつつパルス列点弧信号を作成させるのでは
なく、パルス列点弧信号を予めROMに内蔵させておい
て制御入力に対応して読出させるものであるから、従来
に比し、制御装置が簡素化し、それだけ信頼性が向上す
ると共に装置価格を低減することができ、この効果はイ
ンバータ出力相数が多いほど顕著である。As explained above, this invention does not create a pulse train firing signal while performing a modulation operation in response to the control input, but instead stores the pulse train firing signal in the ROM in advance and generates the pulse train firing signal in response to the control input. Since the inverter is read out, the control device is simpler than the conventional one, and reliability is improved accordingly, and the cost of the device can be reduced, and this effect becomes more pronounced as the number of inverter output phases increases.
第1図は従来のインバータ装置のブロック図、第2図及
び第3図は上記従来例の動作を説明する為の波形図、第
4図はこの発明の実施例を示すブロック図、第5図は上
記実施例を動作を説明する為の波形図である。
図において、4・−・−・制御装置、8−ROM。
なお、図中、同一符号は同一または相当部分を示す。Fig. 1 is a block diagram of a conventional inverter device, Figs. 2 and 3 are waveform diagrams for explaining the operation of the above conventional example, Fig. 4 is a block diagram showing an embodiment of the present invention, and Fig. 5 FIG. 2 is a waveform diagram for explaining the operation of the above embodiment. In the figure, 4--control device, 8-ROM. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
対応してスイッチング素子に与えられるパルス列点弧信
号を予めROMにデータ化して内蔵させ、上記制御入力
により対応する上記データを読出させて上記スイッチン
グ素子のオン・オフを制御することを特徴とするインバ
ータの制御方法。When performing PWM control on an inverter, a pulse train firing signal given to a switching element in response to a control input is stored in a ROM as data in advance, and the corresponding data is read out by the control input to turn on the switching element. - An inverter control method characterized by controlling off.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59176072A JPS6154877A (en) | 1984-08-22 | 1984-08-22 | Controlling method of inverter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59176072A JPS6154877A (en) | 1984-08-22 | 1984-08-22 | Controlling method of inverter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6154877A true JPS6154877A (en) | 1986-03-19 |
Family
ID=16007225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59176072A Pending JPS6154877A (en) | 1984-08-22 | 1984-08-22 | Controlling method of inverter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6154877A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62272877A (en) * | 1986-05-16 | 1987-11-27 | Mitsubishi Heavy Ind Ltd | Inverter equipment |
-
1984
- 1984-08-22 JP JP59176072A patent/JPS6154877A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62272877A (en) * | 1986-05-16 | 1987-11-27 | Mitsubishi Heavy Ind Ltd | Inverter equipment |
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