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Title:
DOUBLE-ACTION ELECTRICITY GENERATOR
Document Type and Number:
WIPO Patent Application WO/2018/018094
Kind Code:
A1
Abstract:
An electrical generator has an armature locate inside a co-axial magnetic field. Each of the armature and the magnetic field has a first axial end mounted to a drive shaft and a second axial end which is free. The respective drive shafts are at opposite axial ends of the generator, and are arranged to counter rotate such that rotation of the drive shafts causes direct relative rotation of the armature and the magnetic field.

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Inventors:
BARREIRO, Manuel Vieira (87 Brixton Cres, Ellenbrook, Western Australia 6069, 6069, AU)
Application Number:
AU2017/050787
Publication Date:
February 01, 2018
Filing Date:
July 28, 2017
Export Citation:
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Assignee:
BARREIRO, Manuel Vieira (87 Brixton Cres, Ellenbrook, Western Australia 6069, 6069, AU)
International Classes:
H02K16/02; H02K16/04; H02K23/60
Domestic Patent References:
WO2003078834A12003-09-25
WO2016147038A12016-09-22
Foreign References:
US20080211236A12008-09-04
US6278197B12001-08-21
US20060163963A12006-07-27
US20100259117A12010-10-14
US20120326539A12012-12-27
Attorney, Agent or Firm:
NEWMAN, Barry (Armour IP, PO Box 3099Broadway Nedlands, Western Australia 6009, 6009, AU)
Download PDF:
Claims:
Claims

1 . An electrical generator having an armature and a magnetic field, one of the

armature and the magnetic field being arranged to locate inside the other; the armature and the magnetic field being co-axial; at least one of the armature and the magnetic field having a first axial end mounted to a first drive shaft and a second axial end which is free, such that rotation of the drive shaft causes direct relative rotation of the armature and the magnetic field.

2. An electrical generator as claimed in claim 1 , wherein the other of the armature and the magnetic field has a first axial end mounted to second drive shaft and a second axial end which is free, the second drive shaft being axially aligned with the first drive shaft, the first and second drive shafts being arranged to counter- rotate.

3. An electrical generator as claimed in claim 1 , wherein the other of the armature and the magnetic field has a first axial end mounted to a fixed position.

4. An electrical generator having an armature and a magnetic field, one of the

armature and the magnetic field being arranged to locate inside the other, the armature and the magnetic field being co-axial, the armature being axially moveable relative to the magnetic field.

5. An electrical generator as claimed in any preceding claim, wherein the electrical generator includes two armatures and two magnetic fields.

6. An electrical generator as claimed in claim 5, wherein the electrical generator has a rotor which is generally hollow cylindrical, the rotor having a magnetic field located around an interior surface of the rotor and an armature located around an exterior of rotor, the rotor being arranged to locate within a stator, the stator having an internal armature which is positioned within the interior of the rotor and an outer magnetic field which is positioned around the exterior of the rotor.

Description:
"DOUBLE-ACTION ELECTRICITY GENERATOR"

Field of the Invention

[0001 ] The present invention relates to a generator for the production of electricity.

Background to the Invention

[0002] The principles of conversion of mechanical energy to electrical energy via rotation of a wire coil through a magnetic field are well known.

[0003] The design of a generator according to these principles is subject to many constraints, including the available input mechanical power (generally available as input speed and torque); the desired electrical output; and the size of both the generator itself and the overall system.

[0004] The present invention proposes a design which seeks to provide efficient electricity production within these constraints.

Summary of the Invention

[0005] According to one aspect of the present invention there is provided an electrical generator having an armature and a magnetic field, one of the armature and the magnetic field being arranged to locate inside the other; the armature and the magnetic field being co-axial; at least one of the armature and the magnetic field having a first axial end mounted to a first drive shaft and a second axial end which is free, such that rotation of the drive shaft causes direct relative rotation of the armature and the magnetic field.

[0006] In one embodiment, the other of the armature and the magnetic field has a first axial end mounted to second drive shaft and a second axial end which is free, the second drive shaft being axially aligned with the first drive shaft, the first and second drive shafts being arranged to counter-rotate.

[0007] In an alternative embodiment, the other of the armature and the magnetic field has a first axial end mounted to a fixed position. [0008] The electrical generator may include two armatures and two magnetic fields. In one such embodiment, the electrical generator has a rotor which is generally hollow cylindrical, the rotor having a magnetic field located around an interior surface of the rotor and an armature located around an exterior of rotor, the rotor being arranged to locate within a stator, the stator having an internal armature which is positioned within the interior of the rotor and an outer magnetic field which is positioned around the exterior of the rotor. In an alternative embodiment, the respective positions of armatures and magnetic fields is reversed.

[0009] According to a second aspect of the present invention there is provided an electrical generator having an armature and a magnetic field, one of the armature and the magnetic field being arranged to locate inside the other, the armature and the magnetic field being co-axial, the armature being axially moveable relative to the magnetic field.

Brief Description of the Drawings

[0010] It will be convenient to further describe the invention with reference to preferred embodiments of the present invention. Other embodiments are possible, and consequently the particularity of the following discussion is not to be

understood as superseding the generality of the preceding description of the invention. In the drawings:

[001 1 ] Figure 1 is a schematic exploded view of a generator in accordance with a first embodiment of the present invention;

[0012] Figure 2 is a closer view of a portion of Figure 1 ;

[0013] Figure 3 is a schematic view of the generator of Figure 1 , shown in an assembled configuration;

[0014] Figure 4 is a schematic view of an internal armature from within a generator in accordance with a second embodiment of the present invention;

[0015] Figure 5 is a schematic view of a rotor for use in conjunction with the internal armature of Figure 4; [0016] Figure 6 is a schematic view of a stator for use in conjunction with the internal armature of Figure 4;

[0017] Figure 7 is an exploded view of a generator including the internal armature of Figure 4; the rotor of Figure 5 and the stator of Figure 6;

[0018] Figure 8 is a schematic assembled view of the generator of Figure 7;

Detailed Description of Preferred Embodiments

[0019] Referring to Figures 1 to 3, there is shown a generator 10, having an armature 12 and a magnetic field 14.

[0020] The armature 12 is located on a central shaft 16. The central shaft 16 has a first axial end 18 and a second axial end 20.

[0021 ] The first axial end 18 of the central shaft 16 is mounted to a first drive shaft 22, arranged to be driven by a motor 24. The central shaft 16 may be mounted directly to the drive shaft 22, or may be mounted via a gearing arrangement 26 if it is desired to have the armature 12 rotating at a different speed to the drive shaft 22.

[0022] The second axial end 20 of the central shaft 16 has a step reduction in diameter, to produce a shoulder 28 and an outer spigot 30.

[0023] The magnetic field 14 is formed by magnets mounted to the inside of a generally cylindrical stator 32. The stator 32 has a substantially closed first axial end 34 and an open second axial end 36.

[0024] The first axial end 34 of the stator 32 is mounted to a second drive shaft 38, arranged to be driven by a motor 40. The stator 32 may be mounted directly to the drive shaft 38, or may be mounted by a gearing arrangement 42 if it is desired to have the stator 32 rotating at a different speed to the drive shaft 38.

[0025] The first drive shaft 16 is arranged to be coaxial with the second drive shaft 38. [0026] The mounting of the stator 32 to the second drive shaft 38 includes an axial recess 44 within which the spigot 30 of the central shaft 16 may locate. The axial recess 44 may include bearings to support the central shaft 16.

[0027] When the generator 10 is assembled, as shown in Figure 3, the first drive shaft 22 and the second drive shaft 38 are arranged to counter-rotate. In this way, the relative speed of the armature 12 passing through the magnetic field 14 is equal to the sum of the two drive shaft rotation speeds.

[0028] It will be appreciated that the generator 10 can be operated without requiring complicated bearings, or a flywheel. It will also be appreciated that the generator 10 can operate with only one of the drive shafts 22, 38 being powered, albeit at a lower relative speed.

[0029] It will also be appreciated that the generator 10 can be readily assembled and disassembled by relative movement of the armature 12 and the magnetic field 14 along a common central axis.

[0030] Figures 4 to 8 show a generator 100 in accordance with a second embodiment of the present invention.

[0031 ] The generator 100 includes an internal armature 1 10 shown in Figure 4. The internal armature 1 10 is generally cylindrical, and extends from a first axial end 1 12 to a second axial end 1 14. The internal armature 1 10 is mounted to a circular base plate 1 16 at its first axial end 1 12. The circular base plate 1 16 includes a central portion 1 18 which is of the same diameter as the internal armature 1 10, and an annular outer portion 120 which extends around the central portion 1 18.

[0032] The generator 100 also includes a rotor 130 as shown in Figure 5. The rotor 130 is generally cylindrical, with an internal diameter slightly larger than the external diameter of the internal armature 1 10. The arrangement is such that the internal armature 1 10 can locate within the rotor 130 with sufficient clearance to allow one to rotate relative to the other around a common central axis. [0033] The rotor 130 has an inner surface 132 and an outer surface 134. The inner surface 132 is formed by a plurality of magnets 136 which cooperate to form a magnetic field. The movement of the internal armature 1 10 relative to the magnetic field formed by the magnets 136 generates electricity in the assembled generator 100.

[0034] The outer surface 134 contains wiring arranged to form a second armature 138.

[0035] The rotor 130 has a first axial end 140 and a second axial end 142. The rotor 130 is open at the second axial end 142. At the first axial end 140 the rotor 130 is closed by a circular top plate 144.

[0036] The generator 100 has a stator 150 shown in Figure 6. The stator 150 is generally cylindrical, with an internal diameter slightly larger than the external diameter of the rotor 130. The arrangement is such that rotor 130 can locate within the stator 150 with sufficient clearance to allow one to rotate relative to the other around a common central axis.

[0037] The stator 150 has an inner surface 152 formed by a plurality of magnets 154 which cooperate to form a magnetic field. The movement of the second armature 138 relative to the magnetic field formed by the magnets 152 generates electricity in the assembled generator 100.

[0038] The stator 150 has a first axial end 156 and a second axial end 158. At the first axial end 156 the stator 150 is closed by the base plate 1 16. The annular outer portion 120 of the base plate 1 16 is of the same diameter as the stator 150. The stator 150 is open at its second axial end 158.

[0039] The generator 100 can be assembled as shown in Figures 7 and 8.

[0040] The base plate 1 16 includes a plurality of countersunk first bolt receiving apertures 160 angularly spaced around the central portion 1 18. There are six first bolt receiving apertures 1 18 in the embodiment shown. These first bolt receiving apertures 160 are arranged to receive first bolts 162, which extend through the base plate 1 16 into internally threaded securing apertures 164 at the first axial end 1 12 of the internal armature 1 10. In this way the base plate 1 16 can be fixed to the internal armature 1 10.

[0041 ] The base plate 1 16 includes a plurality of second bolt receiving apertures 166 angularly spaced around the annular outer portion 120. There are six second bolt receiving apertures 166 in the embodiment shown. These second bolt receiving apertures 166 are arranged to receive second bolts 168, which extend through the base plate 1 16 into internally threaded securing apertures 170 at the first axial end 156 of the stator 150. In this way the base plate 1 16 can be fixed to the stator 150, and the stator 150 fixed to the internal armature 1 10.

[0042] The top plate 144 includes a plurality of third bolt receiving apertures 172 angularly spaced around its periphery. There are four third bolt receiving apertures 172 in the embodiment shown. These third bolt receiving apertures 172 are arranged to receive third bolts 174, which extend through the top plate 144 into internally threaded securing apertures 176 at the first axial end 140 of the rotor 130. In this way the top plate 144 can be fixed to the rotor 130.

[0043] The top plate 144 includes a plurality of countersunk fourth bolt receiving apertures 178 angularly spaced around an inside thereof. There are six fourth bolt receiving apertures 178 in the embodiment shown. These fourth bolt receiving apertures 178 are arranged to receive fourth bolts 180, which extend through the top plate 144 into internally threaded securing apertures 182 within a mating flange 184 of a drive shaft 186. The drive shaft 186 is powered by a motor 188.

[0044] The top plate 144 also includes a centrally located cylindrical coupling 190, on which are mounted slip rings 192. These are arranged to receive current from brushes 194, which extend from a brush unit 196 mounted to the second axial end 1 14 of the internal armature 1 10.

[0045] When the generator 100 is assembled as shown in Figure 8, the motor 188 can be powered to turn the drive shaft 186, which acts to rotate the rotor 130. The magnetic field created by the magnets 136 rotates relative to the internal armature 1 10, generating electrical current which is provided via the brushes 194 to the slip rings 192. At the same time, the second armature 138 rotates within the magnet field formed by the magnets 152, creating further electrical current.

[0046] It will be appreciated that this arrangement requires no bearings other than to support the drive shaft 186, and no fly wheel. The generator can be readily disassembled by the simple expedient of moving the stator 150 in an axial direction.

[0047] It will also be appreciated that the relative position of armatures and magnetic fields can be swapped.

[0048] Modifications and variations as would be apparent to a skilled addressee are deemed to be within the scope of the present invention.




 
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