GB1067678A - Improvements in apparatus for measuring electrical current - Google Patents
Improvements in apparatus for measuring electrical currentInfo
- Publication number
- GB1067678A GB1067678A GB41360/62A GB4136062A GB1067678A GB 1067678 A GB1067678 A GB 1067678A GB 41360/62 A GB41360/62 A GB 41360/62A GB 4136062 A GB4136062 A GB 4136062A GB 1067678 A GB1067678 A GB 1067678A
- Authority
- GB
- United Kingdom
- Prior art keywords
- output
- conductor
- signal
- current
- 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.)
- Expired
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
- G01R19/18—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers
- G01R19/20—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers using transductors, i.e. a magnetic core transducer the saturation of which is cyclically reversed by an AC source on the secondary side
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
1,067,678. Measuring D.C. current. UNIVERSITY OF SOUTHAMPTON and BRITISH PETROLEUM CO. Ltd. Oct. 9, 1963 [Nov. 1, 1962], No. 41360/62. Heading G1U. [Also in Division H3] Apparatus for measuring direct current flowing in a bar form conductor 15 such as a pipe comprises a magnetic transducer including a closed loop magnetic flux circuit, 11 which is placed around the conductor, an input circuit consisting of windings 12a and 12b to which A. C. from a source 13 is applied to saturate the magnetic circuit and an output circuit 14 which provides a signal indicative of the current in the conductor 15. An arrangement for eliminating any error signal in the output circuit is provided externally to the transducer and includes squaring, amplifying and phase and amplitude control circuits 19, 20, 21, to derive from the A. C. supply source 13 a balancing signal of the same form and amplitude as the error signal. The balancing signal is subtractively combined in the differential amplifier 18 with the transducer output, so that the output from the amplifier 18 accurately indicates the current in the conductor 15. The magnetic transducer consists of two magnetic cores 11a and 11b upon which symmetrical input windings 12a and 12b are provided, these windings being arranged to provide opposing flux in the cores. If perfect symmetry is achieved no signal will appear on the output winding 14 in the absence of a current on conductor 15 when the input windings are supplied from the generator 13. Any signal which does appear is fed to a filter 16 which blocks signals of the same frequency as the supply 13, the remainder being passed to the amplifier 17 where the second harmonic of the supply is selectively amplified and passed to the difference amplifier 18. The control circuit 21 in the path of the signal which is fed directly via the circuits 19, 20, 21, is adjusted so that in the absence of current in the conductor 15, zero output is indicated on the meter 22 in the output circuit of the amplifier 18. When a direct current is passed through the conductor 15, the flux patterns in the cores 11a and 11b are affected so that an output appears on the winding 14. This output is passed through the stages 16, 17, 18 previously described and is measured on the meter 22.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB41360/62A GB1067678A (en) | 1962-11-01 | 1962-11-01 | Improvements in apparatus for measuring electrical current |
| CH1328763A CH419338A (en) | 1962-11-01 | 1963-10-29 | Device for measuring an electric current flowing in a conductor without touching the conductor |
| AT867563A AT261737B (en) | 1962-11-01 | 1963-10-30 | Device for measuring direct current |
| SE11994/63A SE327462B (en) | 1962-11-01 | 1963-10-31 | |
| JP1965081884U JPS43629Y1 (en) | 1962-11-01 | 1965-10-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB41360/62A GB1067678A (en) | 1962-11-01 | 1962-11-01 | Improvements in apparatus for measuring electrical current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1067678A true GB1067678A (en) | 1967-05-03 |
Family
ID=10419331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB41360/62A Expired GB1067678A (en) | 1962-11-01 | 1962-11-01 | Improvements in apparatus for measuring electrical current |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS43629Y1 (en) |
| AT (1) | AT261737B (en) |
| CH (1) | CH419338A (en) |
| GB (1) | GB1067678A (en) |
| SE (1) | SE327462B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113341201A (en) * | 2021-06-08 | 2021-09-03 | 合肥博微田村电气有限公司 | Fluxgate current sensor and current measuring method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3234053C2 (en) * | 1982-09-14 | 1985-10-17 | Naučno-issledovatel'skij, proektno-konstruktorskij i technologičeskij institut komplektnogo elektroprivoda, Novosibirsk | Measuring device for the instantaneous value of a current |
| DE3827758C2 (en) * | 1988-08-16 | 1996-08-29 | Bayerische Motoren Werke Ag | Device for monitoring a predetermined current in at least one electrical conductor |
| GB9908599D0 (en) * | 1999-04-16 | 1999-06-09 | Aea Technology Plc | Current sensor |
-
1962
- 1962-11-01 GB GB41360/62A patent/GB1067678A/en not_active Expired
-
1963
- 1963-10-29 CH CH1328763A patent/CH419338A/en unknown
- 1963-10-30 AT AT867563A patent/AT261737B/en active
- 1963-10-31 SE SE11994/63A patent/SE327462B/xx unknown
-
1965
- 1965-10-07 JP JP1965081884U patent/JPS43629Y1/ja not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113341201A (en) * | 2021-06-08 | 2021-09-03 | 合肥博微田村电气有限公司 | Fluxgate current sensor and current measuring method |
| CN113341201B (en) * | 2021-06-08 | 2022-08-09 | 合肥博微田村电气有限公司 | Fluxgate current sensor and current measuring method |
Also Published As
| Publication number | Publication date |
|---|---|
| AT261737B (en) | 1968-05-10 |
| CH419338A (en) | 1966-08-31 |
| SE327462B (en) | 1970-08-24 |
| JPS43629Y1 (en) | 1968-01-12 |
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