JPS5719675A - Detector for reactive current - Google Patents
Detector for reactive currentInfo
- Publication number
- JPS5719675A JPS5719675A JP9404780A JP9404780A JPS5719675A JP S5719675 A JPS5719675 A JP S5719675A JP 9404780 A JP9404780 A JP 9404780A JP 9404780 A JP9404780 A JP 9404780A JP S5719675 A JPS5719675 A JP S5719675A
- Authority
- JP
- Japan
- Prior art keywords
- current
- voltage
- phase
- power
- detector
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/06—Measuring real component; Measuring reactive component
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
PURPOSE:To reduce the number of parts and obtain a detector with higher accuracy and lower cost by detecting components of voltage and a current different in phase by 90 deg. when a power-factor of a load is 1 to obtain the same phase and inverse phase signals of each voltage and current component, and by adding these signals over a period with a positive polarity. CONSTITUTION:A three-phase power source with phases a-c is connected to an inductive load 1, the voltage of a-c phases of this source is detected with a transformer 3 and further a current of the (b) phase is detected with a transformer 2. The relation between these voltage and current is that the current lags behind the voltage by 90 deg. in phase when a power-factor is 1 and a reactive current of an objective circuit is taken out as a voltage signal by taking these voltage and current as elements. Outputs of V01, V02 are inputted to arithmetic impedances Zi1, Zi2 of an amplifier 8 and can be outputted after being amplified with an arithemetic impedance Zf. Said outputs are estimated as an average value, and this average output can as it is be obtained as a reactive current of the value 1Xsintheta.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9404780A JPS5719675A (en) | 1980-07-11 | 1980-07-11 | Detector for reactive current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9404780A JPS5719675A (en) | 1980-07-11 | 1980-07-11 | Detector for reactive current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5719675A true JPS5719675A (en) | 1982-02-01 |
Family
ID=14099640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9404780A Pending JPS5719675A (en) | 1980-07-11 | 1980-07-11 | Detector for reactive current |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5719675A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS629178U (en) * | 1985-07-02 | 1987-01-20 | ||
| CN104122434A (en) * | 2014-08-20 | 2014-10-29 | 高玉琴 | Reactive current measurement circuit |
| CN104237608A (en) * | 2013-06-18 | 2014-12-24 | 无锡市幅瑞自动化科技有限公司 | Distorted current vector detection method based on dq coordinate conversion |
-
1980
- 1980-07-11 JP JP9404780A patent/JPS5719675A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS629178U (en) * | 1985-07-02 | 1987-01-20 | ||
| CN104237608A (en) * | 2013-06-18 | 2014-12-24 | 无锡市幅瑞自动化科技有限公司 | Distorted current vector detection method based on dq coordinate conversion |
| CN104122434A (en) * | 2014-08-20 | 2014-10-29 | 高玉琴 | Reactive current measurement circuit |
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