JPS61174899U - - Google Patents
Info
- Publication number
- JPS61174899U JPS61174899U JP5890485U JP5890485U JPS61174899U JP S61174899 U JPS61174899 U JP S61174899U JP 5890485 U JP5890485 U JP 5890485U JP 5890485 U JP5890485 U JP 5890485U JP S61174899 U JPS61174899 U JP S61174899U
- Authority
- JP
- Japan
- Prior art keywords
- power failure
- circuit
- momentary power
- vvvf
- main circuit
- 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
- 230000006698 induction Effects 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 238000009499 grossing Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control Of Ac Motors In General (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は本考案の動作の一例を示すタイムチヤート、
第３図は従来の瞬停補償回路の一例を示す回路図
である。
１……整流器、２……平滑コンデンサ、３……
ＧＴＲインバータ、４……誘導電動機、１０……
周波数基準設定器、１３……電圧基準アンプ、１
４……Ｖ／ｆ変換器、１５……ＰＷＭ制御回路、
１６……ＧＴＲドライブ回路、１７……瞬停検出
回路、１８……過電圧検出器、１９……ＮＯＲ回
路、２０……コンパレータ。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a time chart showing an example of the operation of this invention.
FIG. 3 is a circuit diagram showing an example of a conventional instantaneous power failure compensation circuit. 1... Rectifier, 2... Smoothing capacitor, 3...
GTR inverter, 4...Induction motor, 10...
Frequency reference setter, 13... Voltage reference amplifier, 1
4...V/f converter, 15...PWM control circuit,
16...GTR drive circuit, 17...Momentary power failure detection circuit, 18...Overvoltage detector, 19...NOR circuit, 20...Comparator.
Claims (1)
整流器の直流出力電圧をインバータを介してＶＶ
ＶＦ交流電圧に変換し誘導電動機を可変速駆動す
るＶＶＶＦ装置の交流電源が瞬時停電したとき、
直流出力電圧の低下を防止して誘導電動機の駆動
を継続するＶＶＶＦ駆動装置の瞬停補償回路にお
いて、瞬停検出回路と、直流主回路過電圧検出器
と、瞬停中でかつ直流主回路が過電圧でないとき
ＶＶＶＦ装置に対する周波数基準値を低下させる
周波数低減回路を備えたことを特徴とするＶＶＶ
Ｆ駆動装置の瞬停補償回路。 The DC output voltage of a rectifier with a smoothing capacitor that rectifies the AC power supply voltage is converted to VV via an inverter.
When there is a momentary power outage of the AC power supply of the VVVF device that converts to VF AC voltage and drives the induction motor at variable speed,
In the instantaneous power failure compensation circuit of a VVVF drive device that prevents a drop in DC output voltage and continues driving the induction motor, there is a momentary power failure detection circuit, a DC main circuit overvoltage detector, and a DC main circuit overvoltage detector during a momentary power failure and when the DC main circuit is overvoltage. A VVV characterized by comprising a frequency reduction circuit that lowers a frequency reference value for the VVVF device when the VVVF device is not used.
Momentary power failure compensation circuit for F drive unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5890485U JPS61174899U (en) | 1985-04-22 | 1985-04-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5890485U JPS61174899U (en) | 1985-04-22 | 1985-04-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61174899U true JPS61174899U (en) | 1986-10-31 |
Family
ID=30584840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5890485U Pending JPS61174899U (en) | 1985-04-22 | 1985-04-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61174899U (en) |
-
1985
- 1985-04-22 JP JP5890485U patent/JPS61174899U/ja active Pending
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