JPS6446658A - Current detector using compound magnetic substance - Google Patents
Current detector using compound magnetic substanceInfo
- Publication number
- JPS6446658A JPS6446658A JP62203840A JP20384087A JPS6446658A JP S6446658 A JPS6446658 A JP S6446658A JP 62203840 A JP62203840 A JP 62203840A JP 20384087 A JP20384087 A JP 20384087A JP S6446658 A JPS6446658 A JP S6446658A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- test
- current
- coil
- positive
- 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
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
PURPOSE:To accurately measure an optional current value by mounting a test coil which produces a positive and a negative test magnetic field and a detection coil for pulse electromotive force on a compound magnetic substance which is treated specially and putting the compound magnetic substance in operation. CONSTITUTION:The compound magnetic substance 1 is so treated that only the magnetic direction of a part where holding force is relatively small is changed to the positive or negative direction according to the operation direction of an auxiliary external magnetic field and further changed speedily when a main external magnetic field operates next in the same direction with the orientation magnetism of a part where the holding force is large. An exciting coil 3 produces a magnetic field corresponding to the level of an AC current Ia to be detected and a signal current generator 6 generates the positive and negative test magnetic fields by the test coil 4 at intervals of a half cycle of the current to be detected. A computing element 17 tests the intensity of the test magnetic field from the voltage across a resistance R at the generation point of the pulse electromotive force of the detection coil 2 to calculate the value of the object current, thus accurately measuring the optional current value.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62203840A JPH0650323B2 (en) | 1987-08-17 | 1987-08-17 | Current detector using composite magnetic material |
US07/175,787 US4944270A (en) | 1987-03-31 | 1988-03-31 | Asymmetrical excitation type magnetic device and method of manufacture thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62203840A JPH0650323B2 (en) | 1987-08-17 | 1987-08-17 | Current detector using composite magnetic material |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6446658A true JPS6446658A (en) | 1989-02-21 |
JPH0650323B2 JPH0650323B2 (en) | 1994-06-29 |
Family
ID=16480570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62203840A Expired - Fee Related JPH0650323B2 (en) | 1987-03-31 | 1987-08-17 | Current detector using composite magnetic material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0650323B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100860376B1 (en) * | 2004-03-10 | 2008-09-25 | 노키아 코포레이션 | System and associated terminal, method and computer program product for synchronizing distributively presented multimedia objects |
-
1987
- 1987-08-17 JP JP62203840A patent/JPH0650323B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100860376B1 (en) * | 2004-03-10 | 2008-09-25 | 노키아 코포레이션 | System and associated terminal, method and computer program product for synchronizing distributively presented multimedia objects |
Also Published As
Publication number | Publication date |
---|---|
JPH0650323B2 (en) | 1994-06-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |