JPS57179667A - Measuring circuit for ac voltage ratio - Google Patents
Measuring circuit for ac voltage ratioInfo
- Publication number
- JPS57179667A JPS57179667A JP6540981A JP6540981A JPS57179667A JP S57179667 A JPS57179667 A JP S57179667A JP 6540981 A JP6540981 A JP 6540981A JP 6540981 A JP6540981 A JP 6540981A JP S57179667 A JPS57179667 A JP S57179667A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- impressed
- voltage ratio
- measuring 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
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
- G01R19/10—Measuring sum, difference or ratio
Abstract
PURPOSE:To simplify an AC voltage ratio measuring circuit by synchronously rectifying an AC voltage to be measured and a reference AC voltage through a switching means and by making a logic control circuit conduct an operation by the use of the first and second integrating circuit and a level detector. CONSTITUTION:An AC voltage Vx to be measured is impressed on an input terminal 11, while a reference AC voltage VR is impressed on an input terminal 12. One of the terminals 11 and 12 is connected to a synchronous rectifier circuit 13 through the intermediary of a switch (S) 1. A voltage E1 is impressed on an integrating circuit 15 through the intermediary of S2. The circuit 15 includes a capacitor (C) 16 and S3 for reset. A voltage E2 is impressed on an integrating circuit 17, and the circuit 17 includes C19 and S5 for reset. A voltage E3 is impressed on a zero level detector 20, wherefrom a zero cross signal 21 is delivered to a logic control circuit 22. The circuit 22 controls the operations of S1-S5 and computes the voltage ratio, and the voltage ratio computed is displayed in a display unit 23. In this way, a simplified measuring circuit ca be obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6540981A JPS57179667A (en) | 1981-04-28 | 1981-04-28 | Measuring circuit for ac voltage ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6540981A JPS57179667A (en) | 1981-04-28 | 1981-04-28 | Measuring circuit for ac voltage ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57179667A true JPS57179667A (en) | 1982-11-05 |
Family
ID=13286198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6540981A Pending JPS57179667A (en) | 1981-04-28 | 1981-04-28 | Measuring circuit for ac voltage ratio |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57179667A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3421873A1 (en) * | 1984-06-13 | 1985-12-19 | Brown, Boveri & Cie Ag, 6800 Mannheim | MEASURING METHOD FOR DETERMINING THE DIFFERENCE BETWEEN AN AC VOLTAGE AND A SECOND VOLTAGE, AND MEASURING DEVICE FOR ITS APPLICATION |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49122772A (en) * | 1973-03-26 | 1974-11-25 |
-
1981
- 1981-04-28 JP JP6540981A patent/JPS57179667A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49122772A (en) * | 1973-03-26 | 1974-11-25 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3421873A1 (en) * | 1984-06-13 | 1985-12-19 | Brown, Boveri & Cie Ag, 6800 Mannheim | MEASURING METHOD FOR DETERMINING THE DIFFERENCE BETWEEN AN AC VOLTAGE AND A SECOND VOLTAGE, AND MEASURING DEVICE FOR ITS APPLICATION |
| EP0165512A2 (en) * | 1984-06-13 | 1985-12-27 | Asea Brown Boveri Aktiengesellschaft | Method for determining the difference between an alternative voltage and a second voltage, and measuring device for the application of said method |
| EP0165512B1 (en) * | 1984-06-13 | 1991-05-08 | Asea Brown Boveri Aktiengesellschaft | Method for determining the difference between an alternative voltage and a second voltage, and measuring device for the application of said method |
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