GB2444982A - Repulsion/attraction linear motor - Google Patents

Repulsion/attraction linear motor Download PDF

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Publication number
GB2444982A
GB2444982A GB0625131A GB0625131A GB2444982A GB 2444982 A GB2444982 A GB 2444982A GB 0625131 A GB0625131 A GB 0625131A GB 0625131 A GB0625131 A GB 0625131A GB 2444982 A GB2444982 A GB 2444982A
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GB
United Kingdom
Prior art keywords
driving member
magnet
tubular housing
unit
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.)
Granted
Application number
GB0625131A
Other versions
GB2444982B (en
GB0625131D0 (en
Inventor
Te-En Liu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB0625131A priority Critical patent/GB2444982B/en
Publication of GB0625131D0 publication Critical patent/GB0625131D0/en
Publication of GB2444982A publication Critical patent/GB2444982A/en
Application granted granted Critical
Publication of GB2444982B publication Critical patent/GB2444982B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K53/00—Alleged dynamo-electric perpetua mobilia
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H02K13/006—Structural associations of commutators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
    • 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
    • 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
    • H02K33/14—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moving in alternate directions by alternate energisation of two coil systems wherein the alternate energisation and de-energisation of the two coil systems are effected or controlled by movement of the armatures
    • 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
    • H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • H02K7/075—Means for converting reciprocating motion into rotary motion or vice versa using crankshafts or eccentrics

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

A linear motor includes a tubular housing (10), a driving member (40), and a magnetic unit (20). The driving member (40) is movably disposed in the tubular housing (10) and includes a permanent magnet/electromagnet (41). The magnetic unit (20) includes first and second magnets/electromagnets (21, 22), each of which covers a respective one of first and second open ends (101, 102) of the tubular housing (10). Alternate reversal of a polarity of a magnetic field of the magnet (41) of the driving member (40) or alternatively reversal of polarity of magnetic units 20 cause reciprocating movement. Contact areas 30,70 are associated with contacts 44 to appropriately energize the mover or a sensor 60 caused the coils 22 to be appropriately energized. Drive member 5 may drive a crank mechanism to obtain rotary movement.

Description

1 2444982
DEVICE FOR GENERATING A MOTIVE FORCE
This invention relates to a device for generating a motive force, more parLlcularly to a device for generating a motive force using electrical energy.
A conventional device for generating a motive force involves the use of fuel, which is relatively expensive.
It has been proposed heretofore to use electric motors.
While numerous electric motors of a conventional type have been proposed in the art, the existing electric motors, particularly those used in motor vehicles, are undesirably bulky and heavy.
Therefore, the object of the present invention is to provide a device fcr generating a motive force that can overcome the aforesaid drawbacks of the prior art.
According to the present invention, a device for generating a motive force comprises a tubular housing, adrivingmember, andamagnetic unit. The tubular housing has opposite flrsL and second open ends. The driving member is movably disposed in the tubular housing and includes amagnet. Thedrivingmemberismovabierelai to the tubular housing between first and second positions that are respectively proximate to the first and second open ends of the tubular housing. The magnetic unit includes first and second magnets, each of which covers a respecLive one of the first and second open ends of the tubular housing. When the driving member moves to the first position, a polarity of a magnetic field of one of the magnet of the driving member and the magnetic unit is reversed such that the first magnet repels and the second magnet attracts Lhe magnet of the driving member, thereby causing movement of the driving member to the second position. When the driving member moves to the second position, the polarity of the magnetic field of said one of the magneL of the driving member and the magnet-i c unit is reversed such that the second magnet repels and the first magnet attracts the magnet of the driving member, thereby causing movement of the driving member to the first position.
Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments with reference to the accompanying drawings, of which: Figure 1 is an exploded perspective view of the firsL preferred embodiment of a device for generating a motive fcrce according to this invention; Figure 2 is a perspective view of the first preferred embodiment in an assembled state; Figure 3 is a parLly sectional view of the first preferred embodiment in a state of use; Figure 4 is an exploded perspective view of the second preferred embodiment of a device for generatinq a motive force according to this invention; and Figure 5 is a partly sectional view of the third preferred embodiment of a device for generating a motive force according to this invention.
Referring to Figures 1 to 3, the first preferred embodiment of a device For generating a motive force according to the present invention includes a tubular housing 1.0, a driving member 40, a magnetic unit 20, a first electrical contact unit 30, a second electrical contact unit 70, and a driven member 50.
The tubular housing 10 of the device has first and second open ends 101, 102 that are opposite to each other in a longitudinal direction, as indicated by arrow (Z) The driving member 40 is disposed movably in the tubular housing 10, includes a magnet 41, and is movable relative to the tubular housing 10 between first and second positions that are respecLively proximate to the first and secondopenends lOT, 102 of the tubularhousing 10. In this embodiment, the magnet 41 of the driving member 40 is an electromagnet, and includes an iron core 43, and a wire 42 coi]..ed around the iron core 43.
The driving member 40 further includes a pair of contact members 44, each of which is connected to a respective one of opposite ends of the wire 42 of the magnet 41 of the driving member 40.
Themagneticunit20includesfirstandsecondmagnets 21, 22, each of which covers a respective one of the first andsecondopenends 101, 102 ofthetubuiarhousing such that a side of the first magnet 21 thaL faces the driving member 40 has the same polarity as that of a side of the second magnet 22 that faccs the driving member 40. in this embodiment, each of thc first and second magnets 21, 22 of the magnetic unit 20 is a permanent magnet. Tn an alternaLive embodiment, each of the first and sccond magnets 21, 22 of Lhe magnetic unit 20 is an electromagnet.
The first electrical contact unit 30 includes first and second contact pads 31, 32, is attached to an inner wall of the tubular housing 1.0, and is disposed in the tubular housing 10 proximate to the first open end 101 of the LubuThr housing 10. As best shown in Figure 3, the first contact pad 31 of the firsL electrical contact unit 30 is connected to a negative terminal of a first electric power source 301, whereas the second conLact pad 32 of the first electrical contact unit 3D is connected to a positive terminal of the first electric power source 301.
The second electrical contact unit 70 includes first and second contact pads 71, 72, is attached to the inner wall. of the tubular housing 10, and is disposed in the tubular housing 10 proximate to the second cpen end 102 of the tubular housing 10 such that each of the first and second contact pads 71, 72 of the second electrical contact unit 70 is opposite to a respective one of the first and second contact pads 31, 32 of the first electrical contact unit 30 in the longitudinal direction (Z) . As best shown in Figure 3, the first contact pad 71 of the second electrical contact unit 70 is connected to a positive terminal of a second electric power source 302, whereas the second contacL pad 72 of the second electrical contact unit 70 is connecLed to a negative terminal of the second electric power source 302.
in this embodimenL, the tubular housing 10 is formed with an elongated through-hole 103 that extends in the longitudinal direction (Z) . The device furLher includes a driven member 50 that extends into the tubular housing 10 through the elongated through-hole 103 in the tubular housing 10, and that is connected to and co-movable with Lhe driving member 40. The construction as such permits imparting of the motive force generated by the device through the driven member 50.
In operation, when the driving member 40 moves to the first position, the magnet 41 of the driving member 40, through the contact members 44 of the dHving member 40, establishes an electrical connection with the first and second contact pads 31, 32 of the first electrical contact unit 30. At this time, a polarity of a magnetic field of the magnet 41 of the driving member 40 is reversed such that the first magnet 21 repels and the secondmagnet 22 attracts the magnet 41 of the driving member 40, thereby causing movement of the driving member 40 to the second position. When the driving member 40 moves to the second position, the magnet 41 of the driving member 40, through the contact members 44 of the driving member 40, establishes an electrical connection with the first and second contacL pads 71, 72 of the second electrical contact unit 70. At this Lime, the polarity of the magneLic field of the magnet 41 of the driving member 40 is reversed such that the second magnet 22 repols and the first magneL 21 attracts the magnet 41 of the driving member 40, thereby causing movement of the drivingmembor 40 to the first position. Thereafter, the operation is repeaLed.
Figure 4 illustrates the socondpreferred embodiment of a device for generating a motive force according to this invention. When compared to theprevious embodiment, the tubular housing 10 is formed with a pair of the elongated through-holes 103 (only one of the elongated through-holes 103 is shown in Figure 4) . In this case, the device includes a pair of the driven, members 50, each of which extends into the tubular housing 20 through a respective one of the elongated Lhrough-holes 103 in the tubular housing 10 and is connected to and co-movable with the driving member 40.
Figure 5 illustrates the third preferred embodiment of a device for generating a motive force according to this invention. When compared to the previous embodiments, the device includes a tubular housing 10' a driving member 40' , a sensor 60, and a magnetic unit 20' The tubular housing 10' has first and second open ends 101' , 102' that are opposite to each other in a longitudinal direction, as indicated by arrow (7) The driving member 40' is disposed movably in the tubularhousinglO' , includesamagnet4l.' , andismovabie relative to the tubular housing 10' between first and second positions that are respectively proximate to the firsL and second open ends 101' , 102' of the tubular housing 10' . In this embodiment, the magnet 41' of Lhe driving menber 40' is a permanent magnet.
The sensor 60 is disposed in the tubular housing 10' at a position between the first and second open ends 101' , 102' of the tubular housing 10' , and is operable so as to detect a magnetic field of the magnet 41'of thedrivingmember4O' andsoas togenerateanelectrical is signal, i.e., avoltaqe, thaL corresponds tothemagnetic field deteeLed thereby. In this embodiment, the sensor may be a Hall sensor or a wire-wound sensor.
The magnetic unit 20' includes first and second magnets 21' , 22' , each of which covers a respective one of the first and secondopenends 101' ,102' of the tubular housing 10' and is coupled to the sensor 60 for receiving the electrical signal generated by the sensor 60 to result in reversal of the polarities of the magnetic fields of the first and second magnets 21' , 22' In this embodiment, each of the first and second magnets 21' 22' of the magneti.c unit 20' is an electromagnet.
In operation, when the driving member 40' moves to the first position, the sensor 60 detects the magnetic field of the magnet 41' of the driving member 40' , and generaLes an electrical signal that corresponds to Lho magnetic field detected thereby. In response to the electrical signal generated by the sensor 60, a polarity of the magnetic field of each of the first and second magnets 21' , 22' is reversed such that the first magneL 21' repels and the second magnet 22' attracts the magnet 41' of the driving member 40' , thereby causing movement of the driving member 40' to the second position. When the driving member 40' moves Lo the second position, the sensor 60 detects the magne Lie field of the magnet 41' ofthedrivingmember4O' ,and generates anelectrical signal that corresponds to the magnetic field detected thereby. In response to the elecLrical signal generated by the sensor 60, the polarity of the magnetic field of each of the first and second magnets 21' , 22' is reversed such that the second magnet 22' repels and the first magnet 21' attracts the magneL 41' of the driving member 40' , thereby causing movement of the driving member 40' to the first position. Thereafter, the operation is repeated.
From the above description, the device of this
invention, as compared to conventional electric motors built from stators and rotors, uses the magnets 21, 21' 22, 22' , 41, 41' to cause reciprocating movement of the driving member 40, 40' between the first and second positions, thereby resulting in a simple, low cost, and light weight motive force generating structure suited for app]H cation to motor vehicles.

Claims (8)

  1. CLAIMS: l.A device for generating a motive force, comprising: a Lubular
    housing having opposite first and second open ends; a driving member movably disposed in said tubular housing, and including a magnet, said driving member being movable rolaLive to said tubular housing between first and second positions that arc respocLively proximate to said first and second open ends cf said tubular housing; and a magnetic unit including first and second magnets, each of which covers a respective one of said firsL and second open ends of said tubular housing; wherein a polarity of a magnetic fi eld of one of said magnet of said driving member and said magnetic uniL is reversed when said driving member moves to the first position such that said first magnet repels and said secondmagnet attracts saidmagnetofsaiddrivingmember, thereby causing movement of said driving member to the second position; and
    wherein the polarity of the magnetic field of said
    one of said magnet of said driving member and said magnetic unit is reversed when said driving member moves to the second posi ti on such that said secondmagnet repels andsaidfirstmagnetattractssaidmagnetofsaiddriving member, thereby causing movement of said driving member to the first position.
  2. 2. The device as claimed in Claim 1, wherein said magnet of said driving member is an electromagnet, said device further comprising: a first electrical conLact unit disposed in said Lubular housing and adapted to be connected to a first eiectricpower source, saidmagnetofsaiddrivinamember establishing an elecLrical connection with said first electrical contact unit when said driving member moves Lo Lhe first position to result in the reversal of the polarity of the magnetic field of said magrieL of said driving member; and a second electrical conLact unit disposed in said Lubular housing and adapted to be connected to a second electricpower source, saidmagnetofsaiddrivingmember establishing an electrical connection with said second electrical contact unit when said driving member moves to the second position to result in the reversal of Lhe polarity of the magnetic field of said magnet of said driving member.
  3. 3. The device as claimed in Claim 2, wherein said magnet of said driving member includes an iron core, and a wire that is coiled on said iron core, said driving member further including a pair of contact members, each of which is connected to a respective one of opposite ends of said wire, said magnet of sai.d driving member establi shing the electrical connection with said first and second electrical contact units through said contact members.
  4. 4. The device as claimed in Claim 2, wherein each of said first and soccnd magnets is a permanent magneL.
  5. 3. The device as claimed in Claim 1, wherein each of said first and second magnets of said magnetic unit i.s an electromagnet, said device further comprising a sensor disposed on said tubular housing, and operable so as to detect the magnetic field of said magnet of said driving member, eachofsaidfirstandsecondmagnetsofsaidmagnetic unit being coupled to said sensor for receiving Lhe electricai signal gcnerated by said sensor to result in the reversal of the polarities of the magnetic field of said first and second magnets in response to the electrical signal from sad sensor.
  6. 6. The device as claimed in Claim 5, wherein said magnet of said driving member is a permanent magnet.
  7. 7. The device as claimed in Claim 1, further comprising a driven member extending into said tubular housing, andconnectedtoandco-movablewithsaiddrivingmember.
  8. 8. The device substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.
GB0625131A 2006-12-18 2006-12-18 Device for generating a motive force Expired - Fee Related GB2444982B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0625131A GB2444982B (en) 2006-12-18 2006-12-18 Device for generating a motive force

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0625131A GB2444982B (en) 2006-12-18 2006-12-18 Device for generating a motive force

Publications (3)

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GB0625131D0 GB0625131D0 (en) 2007-01-24
GB2444982A true GB2444982A (en) 2008-06-25
GB2444982B GB2444982B (en) 2009-04-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013025089A1 (en) 2011-08-12 2013-02-21 Oh Choo-Peng Electrically powered reciprocating motor
CN103683844A (en) * 2012-09-18 2014-03-26 陈志波 Operator motor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4368396A (en) * 1980-11-20 1983-01-11 Humphrey James A Reciprocating electric motor with permanent magnets
US4404503A (en) * 1981-11-02 1983-09-13 Ward William L Reciprocating electric motor
US4928028A (en) * 1989-02-23 1990-05-22 Hydraulic Units, Inc. Proportional permanent magnet force actuator
DE4318234A1 (en) * 1993-06-01 1994-12-08 Escher Wyss Gmbh Shake unit
US20020185920A1 (en) * 2001-06-12 2002-12-12 Harty William Thomas Reciprocating engine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4368396A (en) * 1980-11-20 1983-01-11 Humphrey James A Reciprocating electric motor with permanent magnets
US4404503A (en) * 1981-11-02 1983-09-13 Ward William L Reciprocating electric motor
US4928028A (en) * 1989-02-23 1990-05-22 Hydraulic Units, Inc. Proportional permanent magnet force actuator
DE4318234A1 (en) * 1993-06-01 1994-12-08 Escher Wyss Gmbh Shake unit
US20020185920A1 (en) * 2001-06-12 2002-12-12 Harty William Thomas Reciprocating engine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013025089A1 (en) 2011-08-12 2013-02-21 Oh Choo-Peng Electrically powered reciprocating motor
KR20140073500A (en) * 2011-08-12 2014-06-16 추-펭 오 Electrically powered reciprocating motor
EP2742583A4 (en) * 2011-08-12 2016-01-13 Choo-Peng Oh Electrically powered reciprocating motor
KR101665209B1 (en) * 2011-08-12 2016-10-13 추-펭 오 Electrically powered reciprocating motor
CN103683844A (en) * 2012-09-18 2014-03-26 陈志波 Operator motor

Also Published As

Publication number Publication date
GB2444982B (en) 2009-04-01
GB0625131D0 (en) 2007-01-24

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20111218