JPS57125856A - Phase difference detecting device - Google Patents
Phase difference detecting deviceInfo
- Publication number
- JPS57125856A JPS57125856A JP1153481A JP1153481A JPS57125856A JP S57125856 A JPS57125856 A JP S57125856A JP 1153481 A JP1153481 A JP 1153481A JP 1153481 A JP1153481 A JP 1153481A JP S57125856 A JPS57125856 A JP S57125856A
- Authority
- JP
- Japan
- Prior art keywords
- phase difference
- circuit
- phase
- inputted
- pulse width
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Phase Differences (AREA)
Abstract
PURPOSE:To detect the phase difference in a form of voltage with a simple device, by integrating the output of a phase difference-pulse width converting circuit in accordance with phase advance or phase lag of the phase difference. CONSTITUTION:The load voltage and load current signal converted to pulses is inputted to a phase detecting circuit 15, and it is detected whether the phase difference between two pulses is smaller than 180 deg. or not. A phase difference- pulse width converting circuit 16 outputs a signal of a pulse width proportional to the phase difference if the phase difference is smaller than 180 deg., and the circuit 16 outputs a signal of a pulse width proportional to the difference between 360 deg. and the phase difference if it is larger than 180 deg.. The output of the circuit 16 is inputted to an integrating circuit 22 in the former case and is inputted to an integrating circuit 23 in the latter case by a phase difference separating circuit 21. Outputs of integrating circuits 22 and 23 are inputted to a code translating circuit 24, and the phase difference signal is outputted as a positive voltage in the former case and is outputted as a negative voltage in the latter case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1153481A JPS57125856A (en) | 1981-01-30 | 1981-01-30 | Phase difference detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1153481A JPS57125856A (en) | 1981-01-30 | 1981-01-30 | Phase difference detecting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57125856A true JPS57125856A (en) | 1982-08-05 |
| JPH044554B2 JPH044554B2 (en) | 1992-01-28 |
Family
ID=11780625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1153481A Granted JPS57125856A (en) | 1981-01-30 | 1981-01-30 | Phase difference detecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57125856A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111044784A (en) * | 2020-01-03 | 2020-04-21 | 云南电网有限责任公司电力科学研究院 | Method and device for obtaining load impedance angle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5223974A (en) * | 1975-08-19 | 1977-02-23 | Nippon Columbia Co Ltd | Phase measuring circuit |
-
1981
- 1981-01-30 JP JP1153481A patent/JPS57125856A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5223974A (en) * | 1975-08-19 | 1977-02-23 | Nippon Columbia Co Ltd | Phase measuring circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111044784A (en) * | 2020-01-03 | 2020-04-21 | 云南电网有限责任公司电力科学研究院 | Method and device for obtaining load impedance angle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH044554B2 (en) | 1992-01-28 |
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