JPS559238A - Detector for quantity of electricity of differential type - Google Patents
Detector for quantity of electricity of differential typeInfo
- Publication number
- JPS559238A JPS559238A JP8075678A JP8075678A JPS559238A JP S559238 A JPS559238 A JP S559238A JP 8075678 A JP8075678 A JP 8075678A JP 8075678 A JP8075678 A JP 8075678A JP S559238 A JPS559238 A JP S559238A
- Authority
- JP
- Japan
- Prior art keywords
- output
- positive
- voltage
- negative
- converter
- 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
- Control Of Voltage And Current In General (AREA)
Abstract
PURPOSE: The differential type quantity of electricity detector, which enables positive and negative side return, less operation of control variable, and greater controlled quantity.
CONSTITUTION: The AC voltage Va1 corresponding to the current in electric furnace, for example, is converted into DC Va2 with the AC to DC converter 1, and the reference voltage Vb1 in proportional to the phase voltage of the furnace is converted into DC Vb2 with another AC to DC converter 2. The voltages are fed to the differential voltage detection circuit 3, and if the absolute value of the both is equal, output is 0, and if Va2 is greater, positive output is obtained, and if Vb2 is greater, negative output is obtained. Further, the output is fed in parallel with the first and second level detection circuits 4 and 5, and the signal of positive and negative operation can be obtained with this and three NAND gates 6,7,8. Thus, when the electrode control for electrode type electric furnace is made, for example, it is expected that the effect can be obtained for less lifting up and down operatin of electrodes.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8075678A JPS559238A (en) | 1978-07-03 | 1978-07-03 | Detector for quantity of electricity of differential type |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8075678A JPS559238A (en) | 1978-07-03 | 1978-07-03 | Detector for quantity of electricity of differential type |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS559238A true JPS559238A (en) | 1980-01-23 |
Family
ID=13727245
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8075678A Pending JPS559238A (en) | 1978-07-03 | 1978-07-03 | Detector for quantity of electricity of differential type |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS559238A (en) |
-
1978
- 1978-07-03 JP JP8075678A patent/JPS559238A/en active Pending
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