JPS641434A - Output-voltage setting system for momentary voltage-drop compensator - Google Patents
Output-voltage setting system for momentary voltage-drop compensatorInfo
- Publication number
- JPS641434A JPS641434A JP62154252A JP15425287A JPS641434A JP S641434 A JPS641434 A JP S641434A JP 62154252 A JP62154252 A JP 62154252A JP 15425287 A JP15425287 A JP 15425287A JP S641434 A JPS641434 A JP S641434A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- inverter
- finishing
- momentary
- drop
- 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
Landscapes
- Inverter Devices (AREA)
- Electronic Switches (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
PURPOSE: To obtain an apparatus giving no unnecessary voltage variation to a load by a finishing voltage varying with a change of supply voltage.
CONSTITUTION: The low-frequency variation component of supply voltage is monitored by a low-pass filter with output-voltage limiting circuit 19, a lowered percent voltage value and a reference sine-wave voltage are computed by a multiplier 20, and the result of said computation is inputted as a finishing voltage of momentary voltage-drop compensation to a compensation voltage amplitude decision circuit 10 and compared with the corresponding voltage of said supply voltage to determine the amplitude of a compensation voltage. A difference voltage detector 21 inputs the difference between said reference sinusoidal voltage and the voltage corresponding to said supply voltage to an integrating circuit 15 and sets a decision level at 10% voltage drop. Then, if a momentary voltage drop exceeding 10% occurs, an inverter base control circuit 13 is turned ON at once so that an inverter 5 starts action. A signal inputted to said inverter is a finishing voltage and the inverter 5 makes a compensating action by generation of said finishing voltage.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62154252A JPS641434A (en) | 1987-06-19 | 1987-06-19 | Output-voltage setting system for momentary voltage-drop compensator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62154252A JPS641434A (en) | 1987-06-19 | 1987-06-19 | Output-voltage setting system for momentary voltage-drop compensator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH011434A JPH011434A (en) | 1989-01-05 |
JPS641434A true JPS641434A (en) | 1989-01-05 |
Family
ID=15580154
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62154252A Pending JPS641434A (en) | 1987-06-19 | 1987-06-19 | Output-voltage setting system for momentary voltage-drop compensator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS641434A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015116052A (en) * | 2013-12-12 | 2015-06-22 | 三菱電機株式会社 | Elevator and cage power supply device |
-
1987
- 1987-06-19 JP JP62154252A patent/JPS641434A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015116052A (en) * | 2013-12-12 | 2015-06-22 | 三菱電機株式会社 | Elevator and cage power supply device |
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