JPS55119062A - Speedometer generator - Google Patents
Speedometer generatorInfo
- Publication number
- JPS55119062A JPS55119062A JP2750779A JP2750779A JPS55119062A JP S55119062 A JPS55119062 A JP S55119062A JP 2750779 A JP2750779 A JP 2750779A JP 2750779 A JP2750779 A JP 2750779A JP S55119062 A JPS55119062 A JP S55119062A
- Authority
- JP
- Japan
- Prior art keywords
- projections
- poles
- recesses
- magnet
- magnetic ring
- 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
- Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
PURPOSE: To simplify the construction, and reduce the dimensions, of a speedmeter generator, by utilizing magnetic flux from both N-poles and S-poles of a source of magnetomotive force, which is provided for driving a motor, so as to detect the speed.
CONSTITUTION: A magnet 1 mounted on a soft magnetic disc 2 is provided in the inner circumferential surface thereof with recesses of a pitch γ. A soft magnetic ring 3 constituting a stator has on the whole of its outer circumferential surface projections of the same pitch γ which ar opposed to the recesses and projections of in the inner circumferential surface of the magnet 1. The phases of projections on and recesses in the opposite surfaces of the magnetic ring 3 and magnet 1 are set opposite to each other with respect to the magnetized N-poles and S-poles so as to drive a motor. The magnetic flux density of the magnetic ring 3 as a whole has a positive value or a negative value depending upon the projections on and recesses in the magnet 1 which are now opposed to the projections on the magnetic ring 3. Accordingly, when a rotor is rotated, the density of magnetic flux passed through the magnetic ring 3 is changed to have positive and negative values to generate an AC electromotive force in a detection coil 5. The frequency of this voltage is in proportion to the number of revolutions of the rotor. This structure works as a speedmeter generator.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2750779A JPS55119062A (en) | 1979-03-08 | 1979-03-08 | Speedometer generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2750779A JPS55119062A (en) | 1979-03-08 | 1979-03-08 | Speedometer generator |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27026684A Division JPS60234452A (en) | 1984-12-20 | 1984-12-20 | Tachometer generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55119062A true JPS55119062A (en) | 1980-09-12 |
Family
ID=12223043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2750779A Pending JPS55119062A (en) | 1979-03-08 | 1979-03-08 | Speedometer generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55119062A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5997595U (en) * | 1982-12-20 | 1984-07-02 | 三洋電機株式会社 | Brushless motor with frequency generator |
-
1979
- 1979-03-08 JP JP2750779A patent/JPS55119062A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5997595U (en) * | 1982-12-20 | 1984-07-02 | 三洋電機株式会社 | Brushless motor with frequency generator |
| JPS642538Y2 (en) * | 1982-12-20 | 1989-01-20 |
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