JPS57204461A - Moving-magnet built-in type galvanometer - Google Patents
Moving-magnet built-in type galvanometerInfo
- Publication number
- JPS57204461A JPS57204461A JP8891981A JP8891981A JPS57204461A JP S57204461 A JPS57204461 A JP S57204461A JP 8891981 A JP8891981 A JP 8891981A JP 8891981 A JP8891981 A JP 8891981A JP S57204461 A JPS57204461 A JP S57204461A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- stator
- gap
- permanent magnet
- magnetic field
- 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
- G01R5/00—Instruments for converting a single current or a single voltage into a mechanical displacement
- G01R5/14—Moving-iron instruments
- G01R5/16—Moving-iron instruments with pivoting magnet
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
PURPOSE:To prevent magnetic leakage to the outside, and also to make a galvanometer small-sized, by constituting a magnetic circuit of incorporating a permanent magnet in the inside of a rotor, and surrounding its circumference by a ferromagnetic substance. CONSTITUTION:A rotor consists of a flat permanent magnet 1 and a thin magnetic pole plate 2 which has been stuck to both its sides and has been screwed 2', and to the upper and lower parts of its center part, a rotary shaft 3 is installed. A stator 4 is placed at a position being extremely near the rotor, a static magnetic field generated by the permanent magnet 1 passes through a micro air-gap A, focusing the inside of the magnetic pole plate 2, passes through an air-gap B of one end and the other end in the stator 4, and is fed back. When a current is made to flow a control coil 4' wound around the stator 4, the static magnetic field and the dynamic magnetic field are multiplied in one side of the micro air-gap by the direction of the current, and both the magnetic fields are offset in the other side, therefore, the whole rotor is rotated by some angle. In this way, it is possible to not only get rid of mutual interference in case of using it as a multi-element, but also reduce the quantity of a magnet to be used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8891981A JPS57204461A (en) | 1981-06-11 | 1981-06-11 | Moving-magnet built-in type galvanometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8891981A JPS57204461A (en) | 1981-06-11 | 1981-06-11 | Moving-magnet built-in type galvanometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57204461A true JPS57204461A (en) | 1982-12-15 |
Family
ID=13956320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8891981A Pending JPS57204461A (en) | 1981-06-11 | 1981-06-11 | Moving-magnet built-in type galvanometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57204461A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000064926A (en) * | 1998-07-03 | 2000-03-03 | Waertsilae Nsd Oy Ab | Integral pump and tappet device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4834803U (en) * | 1971-08-31 | 1973-04-26 | ||
| JPS51126876A (en) * | 1975-04-28 | 1976-11-05 | Koike Seiki Kk | Galvanometer |
-
1981
- 1981-06-11 JP JP8891981A patent/JPS57204461A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4834803U (en) * | 1971-08-31 | 1973-04-26 | ||
| JPS51126876A (en) * | 1975-04-28 | 1976-11-05 | Koike Seiki Kk | Galvanometer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000064926A (en) * | 1998-07-03 | 2000-03-03 | Waertsilae Nsd Oy Ab | Integral pump and tappet device |
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