JPS55433A - Rotational phase detector - Google Patents
Rotational phase detectorInfo
- Publication number
- JPS55433A JPS55433A JP7321178A JP7321178A JPS55433A JP S55433 A JPS55433 A JP S55433A JP 7321178 A JP7321178 A JP 7321178A JP 7321178 A JP7321178 A JP 7321178A JP S55433 A JPS55433 A JP S55433A
- Authority
- JP
- Japan
- Prior art keywords
- rotational phase
- phase detector
- apertures
- detecting
- thin
- 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)
Abstract
PURPOSE: To reduce the size of a rotational phase detector by using a rotor magnet as a tachmagnet and by making a detecting element thin.
CONSTITUTION: A plate 18, which is placed in contact with a rotor magnet 15 and which is made of a highly magnetically permeable material such as iron, is formed with first and second apertures 19 and 20. The magnetic flux density of the magnet 15, which leaks through the apertures 19 and 20, is detected to detect the rotational positions of video heads 4 and 5. A thin Hall element 21 is used as a magneticism detecting element. Thus, the techmagnet for detecting the rotational phase can be dispensed with to attain the cost reducing purpose so that the Hall element 24 can be mounted in a lower stationary cylinder 6. Thus, the mounting cost can be reduced while eliminating the requirement for the spare space.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7321178A JPS55433A (en) | 1978-06-19 | 1978-06-19 | Rotational phase detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7321178A JPS55433A (en) | 1978-06-19 | 1978-06-19 | Rotational phase detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55433A true JPS55433A (en) | 1980-01-05 |
Family
ID=13511589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7321178A Pending JPS55433A (en) | 1978-06-19 | 1978-06-19 | Rotational phase detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55433A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5834052U (en) * | 1981-08-31 | 1983-03-05 | スズキ株式会社 | Rotation detection device in electric motor |
JPS5842756U (en) * | 1981-09-18 | 1983-03-22 | 日本ビクター株式会社 | rotation detection device |
JPH0526557U (en) * | 1991-09-21 | 1993-04-06 | 有限会社関車輛工業 | Roof opening / closing device for van type vehicles |
-
1978
- 1978-06-19 JP JP7321178A patent/JPS55433A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5834052U (en) * | 1981-08-31 | 1983-03-05 | スズキ株式会社 | Rotation detection device in electric motor |
JPS5842756U (en) * | 1981-09-18 | 1983-03-22 | 日本ビクター株式会社 | rotation detection device |
JPH0526557U (en) * | 1991-09-21 | 1993-04-06 | 有限会社関車輛工業 | Roof opening / closing device for van type vehicles |
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