JPS5771108A - Electromagnetic driving device - Google Patents
Electromagnetic driving deviceInfo
- Publication number
- JPS5771108A JPS5771108A JP14798880A JP14798880A JPS5771108A JP S5771108 A JPS5771108 A JP S5771108A JP 14798880 A JP14798880 A JP 14798880A JP 14798880 A JP14798880 A JP 14798880A JP S5771108 A JPS5771108 A JP S5771108A
- Authority
- JP
- Japan
- Prior art keywords
- spacing
- plunger
- force
- great
- magnetic
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F7/1607—Armatures entering the winding
Abstract
PURPOSE:To prevent reduction in suction force at a great stroke by sealing magnetic fluid into the spaceing formed between an electromagnet and a plunger. CONSTITUTION:When a coil 13 is energized, a magnetic loop is formed and a plunger 15 is shifted to the left, and as a result, the volumn of a spacing 17 is reduced. Since a magnetic fluid 18 is not compressive, air 16c is compressed to generate pressur P, which is shifted to the left until the P is equal to F/S; where S is a crosssectioned area and F is a suction force of the plunger end face. When the conduction is suspended, the plunger is driven to the right by a force PS and performs a reciprocating motion by excitation or nonexcitation of the electromagnet 1. The following equation can be written in this case; F=1/2XU<2>XmuS/delta<2> where U is a magnet motive force across between end faces 11c and 15a, mu is a magnetic permeability and delta is a spacing in the end face. According to the above constitution, since the spacing is sealed with the magnetic substance having a great mu, a great force can be generated at a stroke greater than for the air when the spacing is measured constant.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14798880A JPS5771108A (en) | 1980-10-21 | 1980-10-21 | Electromagnetic driving device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14798880A JPS5771108A (en) | 1980-10-21 | 1980-10-21 | Electromagnetic driving device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5771108A true JPS5771108A (en) | 1982-05-01 |
Family
ID=15442616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14798880A Pending JPS5771108A (en) | 1980-10-21 | 1980-10-21 | Electromagnetic driving device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5771108A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6186905U (en) * | 1984-11-14 | 1986-06-07 | ||
WO1998009302A1 (en) * | 1996-08-28 | 1998-03-05 | Ferrofluidics Corporation | Quiet ferrofluid solenoid |
US6242994B1 (en) | 1999-03-16 | 2001-06-05 | Ferrofluidics Corporation | Apparatus to reduce push back time in solenoid valves |
EP0997675A3 (en) * | 1998-10-30 | 2001-07-18 | Smc Corporation | Solenoid valve |
DE10104524A1 (en) * | 2001-01-31 | 2002-08-22 | Schuessler Gmbh & Co Kg | Adjustment device has magnetic element(s) whose magnetic field strength is adjusted to set distance between bearer and counter elements via ferrous fluid of shape defined by magnetic field |
WO2009095725A1 (en) * | 2008-01-29 | 2009-08-06 | Wamala Daniel | Electromagnetically operated mechanical actuator |
-
1980
- 1980-10-21 JP JP14798880A patent/JPS5771108A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6186905U (en) * | 1984-11-14 | 1986-06-07 | ||
WO1998009302A1 (en) * | 1996-08-28 | 1998-03-05 | Ferrofluidics Corporation | Quiet ferrofluid solenoid |
US5955934A (en) * | 1996-08-28 | 1999-09-21 | Ferrofluidics Corporation | Quiet ferrofluid solenoid with cushion |
US5969589A (en) * | 1996-08-28 | 1999-10-19 | Ferrofluidics Corporation | Quiet ferrofluid solenoid |
EP0997675A3 (en) * | 1998-10-30 | 2001-07-18 | Smc Corporation | Solenoid valve |
US6242994B1 (en) | 1999-03-16 | 2001-06-05 | Ferrofluidics Corporation | Apparatus to reduce push back time in solenoid valves |
DE10104524A1 (en) * | 2001-01-31 | 2002-08-22 | Schuessler Gmbh & Co Kg | Adjustment device has magnetic element(s) whose magnetic field strength is adjusted to set distance between bearer and counter elements via ferrous fluid of shape defined by magnetic field |
WO2009095725A1 (en) * | 2008-01-29 | 2009-08-06 | Wamala Daniel | Electromagnetically operated mechanical actuator |
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