JPS5587051A - Measuring method for electric power amount - Google Patents
Measuring method for electric power amountInfo
- Publication number
- JPS5587051A JPS5587051A JP15870278A JP15870278A JPS5587051A JP S5587051 A JPS5587051 A JP S5587051A JP 15870278 A JP15870278 A JP 15870278A JP 15870278 A JP15870278 A JP 15870278A JP S5587051 A JPS5587051 A JP S5587051A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- hall element
- temperature
- resistor
- conversion section
- 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
Abstract
PURPOSE: To increase the measuring accuracy of watt-hour meter with temperature compensation over a wide variety of temperatures, by adjusting the temperature dependancy of Hall element with the voltage-frequency converter connected to the Hall element.
CONSTITUTION: The electric power is converted into a voltage with the power conversion section 31 provided with the Hall element in the power-voltage conversion section 30 and amplified. The voltage amplified is converted into a frequency with the voltage-frequency conversion section 33 and displayed on the display section 34. On the other hand, as the Hall element mentioned above, GaAs Hall element (temperature coefficient is -0.05%/°C) is used and the metal film resistor, 5kΩ is used for the resistor R2(42) and the resistor, 1kΩ, having positive temperature characteristics, e.g., +0.3%/°C, is used for the resistor R1(41). Then, the temperature coefficient in the reference voltage Vr is about -0.05%/°C, and the temperature change in the Hall voltage VH of Hall element and the reference voltage Vr can be made equal with the control of the reference voltage Vr. Thus, the change in the output voltage with the temperature change in the Hall element can be compensated.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15870278A JPS5587051A (en) | 1978-12-25 | 1978-12-25 | Measuring method for electric power amount |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15870278A JPS5587051A (en) | 1978-12-25 | 1978-12-25 | Measuring method for electric power amount |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5587051A true JPS5587051A (en) | 1980-07-01 |
Family
ID=15677483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15870278A Pending JPS5587051A (en) | 1978-12-25 | 1978-12-25 | Measuring method for electric power amount |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5587051A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007298415A (en) * | 2006-04-28 | 2007-11-15 | Toshiba Corp | Current detection device |
-
1978
- 1978-12-25 JP JP15870278A patent/JPS5587051A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007298415A (en) * | 2006-04-28 | 2007-11-15 | Toshiba Corp | Current detection device |
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