JPH0249399U - - Google Patents
Info
- Publication number
- JPH0249399U JPH0249399U JP12710988U JP12710988U JPH0249399U JP H0249399 U JPH0249399 U JP H0249399U JP 12710988 U JP12710988 U JP 12710988U JP 12710988 U JP12710988 U JP 12710988U JP H0249399 U JPH0249399 U JP H0249399U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- signal
- power
- converter
- 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
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control Of Ac Motors In General (AREA)
Description
第１図は本考案の実施例を説明する図、第２図
は従来の技術による交流電動機の可変速駆動の構
成を説明する図である。
１……交流入力電源、２……順変換器、３……
コンデンサ、４……逆変換器、５……交流電動機
、６……停電検出器、７……速度設定器、８……
Ｖ／Ｆ基準発生器、９……電圧基準発生器、１０
……直流電圧制御回路、１１……直流電圧検出器
、１２……ＰＷＭ制御回路、１３……ゲート信号
発生器、１４……出力電流検出器、１５……交直
変換器、１６……出力電流設定器、１７……演算
増幅器、１８……直流電圧設定器、１９……演算
増幅器、２０……演算増幅器。
FIG. 1 is a diagram illustrating an embodiment of the present invention, and FIG. 2 is a diagram illustrating a configuration of a variable speed drive of an AC motor according to the prior art. 1...AC input power supply, 2...Forward converter, 3...
Capacitor, 4... Inverter, 5... AC motor, 6... Power failure detector, 7... Speed setting device, 8...
V/F reference generator, 9... Voltage reference generator, 10
... DC voltage control circuit, 11 ... DC voltage detector, 12 ... PWM control circuit, 13 ... Gate signal generator, 14 ... Output current detector, 15 ... AC/DC converter, 16 ... Output current Setting device, 17... operational amplifier, 18... DC voltage setting device, 19... operational amplifier, 20... operational amplifier.
Claims (1)
流可変電圧に変換するサイリスタ順変換器と、得
られた直流電源をＰＷＭ制御により任意の可変電
圧可変周波数の交流電源に変換する逆変換器と、
負荷の無効電力を処理するためのコンデンサを接
続した電圧形自励インバータ装置において前記交
流入力電源の電圧降下または停電を検出したとき
に、前記直流電源回路の電圧を任意の電圧となる
ように設定する直流電圧設定器の信号と直流電圧
の検出信号との偏差信号を演算増幅した値を逆変
換器の出力周波数基準とすることにより、直流電
圧を設定値に保ち負荷電流が任意の電流となるよ
うに設定する電流設定器の信号と負荷電流の検出
信号との偏差信号を演算増幅した値を逆変換器の
出力基準とすることにより、負荷電流を設定値に
保ち、直流電圧の検出信号によりサイリスタ順変
換器の位相制御信号を演算する回路を設け、電圧
降下または停電が回復したとき最適な位相制御信
号からサイリスタ順変換器が動作開始することを
特徴とした電力変換器の制御装置。 a thyristor forward converter that converts an AC input power source into an arbitrary variable DC voltage using a phase control circuit; an inverse converter that converts the obtained DC power source into an AC power source with an arbitrary variable voltage and variable frequency using PWM control;
When a voltage drop or power outage of the AC input power supply is detected in a voltage type self-excited inverter device connected to a capacitor for processing reactive power of a load, the voltage of the DC power supply circuit is set to an arbitrary voltage. By using the value obtained by operationally amplifying the deviation signal between the DC voltage setting device signal and the DC voltage detection signal as the output frequency standard of the inverter, the DC voltage can be kept at the set value and the load current can be any current. By using the value obtained by operationally amplifying the deviation signal between the current setting device signal and the load current detection signal to be set as the output standard of the inverter, the load current can be maintained at the set value, and A control device for a power converter, comprising a circuit for calculating a phase control signal of a thyristor forward converter, and the thyristor forward converter starts operating from an optimal phase control signal when a voltage drop or power outage is recovered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12710988U JPH0249399U (en) | 1988-09-30 | 1988-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12710988U JPH0249399U (en) | 1988-09-30 | 1988-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0249399U true JPH0249399U (en) | 1990-04-05 |
Family
ID=31379234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12710988U Pending JPH0249399U (en) | 1988-09-30 | 1988-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0249399U (en) |
-
1988
- 1988-09-30 JP JP12710988U patent/JPH0249399U/ja active Pending
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