US3777236A - Reciprocating motor - Google Patents

Reciprocating motor Download PDF

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Publication number
US3777236A
US3777236A US00300743A US3777236DA US3777236A US 3777236 A US3777236 A US 3777236A US 00300743 A US00300743 A US 00300743A US 3777236D A US3777236D A US 3777236DA US 3777236 A US3777236 A US 3777236A
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US
United States
Prior art keywords
magnetic circuit
stationary
secondary turns
auxiliary magnetic
auxiliary
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.)
Expired - Lifetime
Application number
US00300743A
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English (en)
Inventor
J Hrubes
A Dubansky
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Czech Academy of Sciences CAS
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Czech Academy of Sciences CAS
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/12—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moving in alternate directions by alternate energisation of two coil systems
    • 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
    • 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
    • H01F7/13—Electromagnets; Actuators including electromagnets with armatures characterised by pulling-force characteristics

Definitions

  • a motion electromagnet having a main magnetic circuit with an exciting coil.
  • An auxiliary magnetic circuit under the influence of the magnetic flux of the main magnetic circuit has a movable and a stationary part with movable and stationary windings respectively therein which are off-set with a constant air gap maintained between the stationary and movable parts.
  • Energizing the exciting coil of the main magnetic circuit moves the movable parts of the auxiliary magnetic circuit into alignment with the stationary part.
  • Another object of the invention is to elimate shocks of the electromagnet where it is used for generating vibrations.
  • Still another object of this invention is to provide an electromagnet with a substantially more uniform pull force than obtained with currently used electromagnets.
  • a motion electromagnet having a main magnetic circuit with an exciting coil, connected to a source of electric alternating current by way of a switching device.
  • the main magnetic circuit is provided with a pair of coaxial shortcircuited secondary turns, one turn being stationary and the other turn being movable with respect to the first in the direction of their common axis.
  • An auxiliary magnetic core or circuit encompasses the pair of coaxial secondary turns, and consists of a stationary part, encompassing a part of the stationary secondary turn and of a movable part, encompassing a part of the movable secondary turn, with a constant air gap between both parts of the auxiliary magnetic circuit.
  • the main and auxiliary magnetic circuits are symmetrically duplicated and alternatively actuated by said source via said switching means for providing an oscillating motion in the electromagnet.
  • FIG] is a cross-sectional view of one embodiment of the electromagnet of the present invention taken along lines II of FIG.2.
  • FIG.2 is a cross-sectional view, the left-hand portion of which is taken along lines IIlI of FIG.3 and the right-hand portion of which is taken along lines Il'II' of FIG.3.
  • FIG.3 is a cross-sectional view of FIG] taken along line Ill-lll.
  • the motion electromagnet shown in the drawings has two mutually electrically and magnetically independent magnetic circuits 1 with exciting coils 2.
  • the exciting coils 2 are alternately connected by a conventional switching device in the required rhythms to a source 16 of alternating current.
  • this switching device is indicated schematically as a changeover switch 15.
  • Both main magnetic circuits 1 are either mutually directly fixed, or maintained at a distance by connecting pieces or spacers 11 (see FIG.2).
  • Each of these main magnetic circuits 1 is provided with a pair of coaxial short-circuited secondary turns or windings 3 and 4, the turns 3 being stationary and the turns 4 being shiftable or movable with respect to turns 3 in the direction of their common axis.
  • Each pair of secondary turns 3 and 4 are encompassed by an auxiliary magnetic circuit 5 and 6, respectively, consisting of a stationary core or part 5 encompassing a part of the stationary secondary turn 3 and fixed to the main magnetic circuit 1 by brackets 17 of non-magnetic material (see FIG.2,3) and of a mobile or movable core or part 6 encompassing a part of the mobile secondary turn 4.
  • the movable core 6 is posited for linear movement on and guided by guidings 12 (see FIG.1), positioned between both secondary turns 3 and 4 and enabling a mutually free movement of both turns 3 and 4 in the direction of their common axis.
  • the arrangement can, however, be easily modified to provide for a swinging motion of the movable core 6 by suspending the mobile core 6 (not illustrated) or supporting it by means of bearings (not illustrated).
  • the auxiliary magnetic circuits 5 and 6 are closed via a constant air gap 7, whereby both their stationary parts 5 and their mobile parts 6 have the shape of a horse shoe (see F163) and the gaps of the horse shoes are occupied by the secondary turns 3 and 4.
  • the air gap 7 is as small as possible with a distance of 0.2 mm being generally sufficient.
  • a pair of short-circuited auxiliary turns 8 and 9 are embedded into the surfaces of the magnetic circuits 5 and 6 forming the air gap 7.
  • the auxiliary turns 8 and 9 perform the function of suppressing vibrations generated by the frequency of the alternating feeding current.
  • the corresponding auxiliary turns 8 and 9 on the stationary and mobile parts 5 and 6 of the auxiliary magnetic circuits are in register or alignment when the stationary and mobile secondary turns 3 and 4 are in register. This case is indicated in the right part of FIG.3.
  • the mobile turns 4 and mobile parts 6 of the auxiliary magnetic circuits corresponding to both main magnetic circuits 1 are mutually connected by adjustable connecting elements 10, by'means of which the magnitude of their deviation with respect to the stable secondary turns 3 and parts 5 of the auxiliary magnetic circuits can be adjusted.
  • adjustable connecting elements 10 for cases of extreme deviations stops 14 are provided on the main magnetic circuits 1 (see FIG.2) which are, however, normally out of action or not used.
  • the movable parts 6 are spaced from the cores 1 by the gap 13 (F101).
  • Alternating electric current is applied by the switching device 15 from the source 16 alternately exciting coils 2 of the main magnetic circuits 1.
  • the switching device 15 is advantageously adapted to enable the adjustment of the switching-over from relatively low speeds up to speeds corresponding to the resonant frequency of the arrangement, to which the vibrating movement has to be transmitted.
  • the switching device 15 can be based on any suitable known principle, for instance being driven by an electric motor or by a suitable conventional electronic circuit for accomplishing the desired switching function and can include conventional switching speed adjusting means 15'.
  • the introduction of current into the exciting coil 2 of the main magnetic circuit 1 causes generation of currents in both secondary turns 3 and 4 which induce magnetic fluxes in the auxiliary magnetic circuits 5 and 6 and tends to bring parts 5 and 6 thereof into alignment.
  • both the main and auxiliary magnetic circuits can be adjusted differently for oscillations in a straight direction or for oscillations in the shape of swinging around a common axis, while maintaining a constant air gap, without deviating from the scope of this invention.
  • the motion electromagnet has to secure some constant position of some part, for instance a constant position of a cut-in or cut-out contactor, operating in a medium, where it is exposed to vibrations so that there is a possibility that its position could be unfavorably influenced by these vibrations
  • a single main magnetic circuit 1 with a pair of secondary turns 3 and 4 and the respective auxiliary magnetic circuit 5 and 6 can be provided.
  • only one-half the symmetrical magnetic and electrically operated structure shown in the drawings would be-employed.
  • a motion electromagnet having a constant air gap and an increased initial pull force comprising a. a main magnetic circuit having an exciting coil for generating a magnetic flux in said main magnetic circuit;
  • switch means coupled between said source of potential and said exciting coil for selectively actuating said exciting coil
  • an auxiliary magnetic circuit encompassing both said first and secondary turns having a stationary part encompassing a part of said first secondary turns and a mobile part encompassing a part of said secondary turns;

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Electromagnets (AREA)
  • Linear Motors (AREA)
US00300743A 1971-10-26 1972-10-25 Reciprocating motor Expired - Lifetime US3777236A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS754271A CS153699B1 (it) 1971-10-26 1971-10-26

Publications (1)

Publication Number Publication Date
US3777236A true US3777236A (en) 1973-12-04

Family

ID=5424754

Family Applications (1)

Application Number Title Priority Date Filing Date
US00300743A Expired - Lifetime US3777236A (en) 1971-10-26 1972-10-25 Reciprocating motor

Country Status (10)

Country Link
US (1) US3777236A (it)
JP (1) JPS4850259A (it)
CA (1) CA952174A (it)
CS (1) CS153699B1 (it)
DE (1) DE2245947A1 (it)
FR (1) FR2157940A1 (it)
GB (1) GB1348084A (it)
IT (1) IT968745B (it)
SE (1) SE376337B (it)
SU (1) SU507901A1 (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3891874A (en) * 1973-05-31 1975-06-24 Mechanical Tech Inc Compensated reciprocating electrodynamic machine
US6225713B1 (en) * 1999-03-11 2001-05-01 Teijin Seiki Co., Ltd Electromagnetic force motor and method of manufacturing the same
WO2002037650A1 (fr) * 2000-11-06 2002-05-10 Viktor Pavlovich Gorobtsov Moteur magnetique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2839340A1 (de) * 1978-09-09 1980-03-27 Daimler Benz Ag Elektromagnetische vorrichtung zur betaetigung schneller schaltglieder

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US824953A (en) * 1904-11-07 1906-07-03 Paul Schiemann Electric tool.
US2003647A (en) * 1930-06-04 1935-06-04 Dillstrom Torbjorn Viktor Electric motor
US2690128A (en) * 1950-03-24 1954-09-28 North American Solvay Inc Electromagnetic pumping device
US3130334A (en) * 1960-11-04 1964-04-21 Nowak Kazimierz Marian Reciprocating motor
US3161793A (en) * 1960-09-13 1964-12-15 Nat Res Dev Electrical machines involving the reciprocation of moving parts
US3453463A (en) * 1968-02-05 1969-07-01 Gulf General Atomic Inc Electrodynamic actuator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US824953A (en) * 1904-11-07 1906-07-03 Paul Schiemann Electric tool.
US2003647A (en) * 1930-06-04 1935-06-04 Dillstrom Torbjorn Viktor Electric motor
US2690128A (en) * 1950-03-24 1954-09-28 North American Solvay Inc Electromagnetic pumping device
US3161793A (en) * 1960-09-13 1964-12-15 Nat Res Dev Electrical machines involving the reciprocation of moving parts
US3130334A (en) * 1960-11-04 1964-04-21 Nowak Kazimierz Marian Reciprocating motor
US3453463A (en) * 1968-02-05 1969-07-01 Gulf General Atomic Inc Electrodynamic actuator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3891874A (en) * 1973-05-31 1975-06-24 Mechanical Tech Inc Compensated reciprocating electrodynamic machine
US6225713B1 (en) * 1999-03-11 2001-05-01 Teijin Seiki Co., Ltd Electromagnetic force motor and method of manufacturing the same
WO2002037650A1 (fr) * 2000-11-06 2002-05-10 Viktor Pavlovich Gorobtsov Moteur magnetique

Also Published As

Publication number Publication date
CA952174A (en) 1974-07-30
DE2245947A1 (de) 1973-05-03
GB1348084A (en) 1974-03-13
IT968745B (it) 1974-03-20
CS153699B1 (it) 1974-03-29
SE376337B (it) 1975-05-12
JPS4850259A (it) 1973-07-16
FR2157940A1 (it) 1973-06-08
SU507901A1 (ru) 1976-03-25

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