JPS63187591U - - Google Patents
Info
- Publication number
- JPS63187591U JPS63187591U JP7732487U JP7732487U JPS63187591U JP S63187591 U JPS63187591 U JP S63187591U JP 7732487 U JP7732487 U JP 7732487U JP 7732487 U JP7732487 U JP 7732487U JP S63187591 U JPS63187591 U JP S63187591U
- Authority
- JP
- Japan
- Prior art keywords
- reactor
- current
- current ratio
- certain range
- control inverter
- 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
- 238000010586 diagram Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 1
Description
第１図は、本考案によるＰＷＭ制御インバータ
の一実施例図、第２図は電流比率演算手段４２の
詳細構成図、第３図は本考案の作用を説明するた
めのタイムチヤート、第４図、第５図は従来のＰ
ＷＭ制御インバータの構成図、第６図は同期式Ｐ
ＷＭ制御を採用したインバータの出力周波数とキ
ヤリア周波数および負荷電流の関係である。
１０…ＰＷＭインバータ、２１…タツプ付リア
クトル、３０…電磁接触器、３１…交流電動機、
４０…交流器、４２…電流比率演算手段、４３…
比較器、４４…最大比率設定器、４６…タツプ切
換器。
FIG. 1 is a diagram of one embodiment of the PWM control inverter according to the present invention, FIG. 2 is a detailed configuration diagram of the current ratio calculation means 42, FIG. 3 is a time chart for explaining the operation of the present invention, and FIG. 4 , Figure 5 shows the conventional P
The configuration diagram of the WM control inverter, Figure 6 is the synchronous type P
This is the relationship between the output frequency, carrier frequency, and load current of an inverter that employs WM control. 10...PWM inverter, 21...reactor with tap, 30...magnetic contactor, 31...AC motor,
40... AC generator, 42... Current ratio calculation means, 43...
Comparator, 44...Maximum ratio setter, 46...Tap changer.
Claims (1)
Ｗ制御インバータにおいて、前記リアクトルを可
変インダクタンス形のリアクトルとし、前記ＰＷ
Ｍ制御インバータの出力電流Ｉａと該出力電流中
に含まれるチヨツピング周波数成分のリツプル電
流Ｉｃを検出してその電流比率Ｉｃ／Ｉａを演算
出力する電流比率演算手段と、前記電流比率Ｉｃ
／Ｉａが一定の範囲を超えたとき、前記リアクト
ルのインダクタンスを増減させる指令を出力する
比較手段を設け、負荷の変動や運転周波数が変化
してもリツプル電流含有率が一定の範囲になるよ
うにしたことを特徴とするＰＷＭ制御インバータ
。 PM that drives an AC motor via a reactor
In the W control inverter, the reactor is a variable inductance type reactor, and the PW
a current ratio calculating means for detecting the output current Ia of the M-controlled inverter and the ripple current Ic of the chopping frequency component included in the output current and calculating and outputting the current ratio Ic/Ia; and the current ratio Ic.
/Ia exceeds a certain range, a comparison means is provided that outputs a command to increase or decrease the inductance of the reactor, so that the ripple current content remains within a certain range even if load fluctuations or operating frequency change. A PWM control inverter characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7732487U JPS63187591U (en) | 1987-05-25 | 1987-05-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7732487U JPS63187591U (en) | 1987-05-25 | 1987-05-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63187591U true JPS63187591U (en) | 1988-12-01 |
Family
ID=30925222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7732487U Pending JPS63187591U (en) | 1987-05-25 | 1987-05-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63187591U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11554555B2 (en) | 2017-05-30 | 2023-01-17 | Tetra Laval Holdings & Finance S.A. | Apparatus for sealing the top of a package for a food product and system for forming and filling a food package |
-
1987
- 1987-05-25 JP JP7732487U patent/JPS63187591U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11554555B2 (en) | 2017-05-30 | 2023-01-17 | Tetra Laval Holdings & Finance S.A. | Apparatus for sealing the top of a package for a food product and system for forming and filling a food package |
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