AU668251B2 - An electro magnetic rotating machine - Google Patents

Description

P/00/01 ilw Regulation 3,2

AUSTRALIA

Patents Act 1990

ORIGINAL

COMPLETE SPECIFICATION STANDARD PATENT Invention Title: AN BjEETRO MAGNETIC ROTAT4iNGq. CHIN E **'TUhe following statement is a full description of this invention, including the best m*irethod of performing it known to me:fees sees 0 00 1 1 -2- The present invention relates to the field of electro magnetic generation, attraction and repulsion.

Problems associated with conventional machinery in this field, known as an axial flux machine, have generally been attributed to the machine having a greater number of air gaps, but, since there is twice the amount of magnetic flux presented to the generating components, it seems that the real problem, with this type of machine, is the configuration of the machine's conductor windings, which tend to impede the rotating magnetic force applied to said machine.

In accordance with one aspect of the invention there is provided an axial flux electro magnetic rotating machine comprising rotor means having at least one permanent or electro magnet mounted at outer parts of side wall means secured l to a drive shaft, said permanent or electro magnet creating rotor magnetic poles, o S.said rotor means rotatable with said drive shaft and said drive shaft rotatable by "external means, at least one pair of axially spaced apart electro magnetic stator S 15 coils disposed on opposite sides of said rotor means, the axis of each said S. electro magnetic stator coil being spaced from and substantially transverse to the axis of said rotor means and said rotor means arranged to pass between °i said electro magnetic stator coils, said electro magnetic stator coils being connected, in series, to axially spaced apart fixed solenoids disposed on 20 opposite sides of said rotor magnetic poles, the axis of each said fixed solenoid being substantially transverse to a radius of said rotor means, wherein movement of said rotor magnetic poles will induce current flow within the innerside conductor windings of said electro magnetic stator coils, said conductor windings being wound in such a direction that said induced current flow will create a composite magnetic field force around said electro magnetic stator coils, said fixed solenoids and said rotor magnetic poles, such that said composite magnetic field is biased to the plane of rotation of said rotor means and the magnetic polarities are capable of accelerating said rotor magnetic poles in the direction of rotation of said rotor means.

In the embodiment to be described herein, the machine of the present invention provides two pairs of fixed, square, diametrical electro magnetic coils and two pairs of fixed, diametrical air cored solenoids, all arranged in series configuration, with said electro magnetic coils and solenoids lying astride the path of two radially opposed, rotating magnetic forces. When said rotating magnetic forces energise the inner-side conductors of said fixed electro magnetic coils, the electro magnetic force patterns around said fixed electro magnetic coils, produced by current flow within said fixed electro magnetic coils, will attract said rotating magnetic forces, while, simultaneously, said electric current flow will energise said fixed solenoids and repel said rotating magnetic forces, in the direction of rotation. Said rotating magnetic forces may be either, permanent magnets, or electro magnetic coils, energised by direct current, via slip rings and brushes mounted on the rotor drive shaft, or, in the instance of larger machines, by an "exciter" generator, which is secured to the non- 15 operational end of said rotor drive shaft and rectifiers.

U U In one application of the invention, while the machine may function either as a generator or a motor, its particular application is as an Electro Magnetically boosted Flywheel, which may be attached to any crankshaft, turbine shaft, or transmission shaft.

Ui~ 20 In another application of the invention, a direct current motor drives a permanent oU• magnet-equipped machine. The generated output from said machine, less the voltage dropped on the fixed solenoids, is applied, via transformers and rectifiers, to a battery storage system, which is the energy source for said direct current motor.

To assist with understanding the invention, reference will be made to the accompanying drawings, in which show an embodiment of the present invention: Figure 1 shows a schematic, rear, vertical section of the machine; -4- Figure 2 shows a schematic, top view of the machine, including a representation of the magnetic charge induced and the subsequent current flow, as the rotating magnetising force passes between a pair of fixed, square electro magnetic coils.

Figure 3 shows a schematic, top view of the machine, depicting the composite magnetic field pattern produced around the fixed, square electro magnetic coils and fixed solenoids, during the passage of the rotating magnetic force between said electro majnetic coils; and Figure 4 shows a vertical, side view of the machine.

Referring to Figure 1, it can be seen that, rotating around drive shaft 1, are permanent magnets 2 and 3, with their polarities shown as N and S. (Bearing in mind that electro magnets may be substituted). Permanent magnets 2 and 3 are mounted within shaped slots at the outer "-rts of circular side walls 4a and 4b, which are secured to hub 5 and drive shaft 1. Rim 6 encloses side walls 4a and 4b and the direction of rotation is shown by arrowed line 7. The circular side s* I I walls 4a and 4b, hub 5, rim 6 and permanent magnet 2 and 3 form a rotor.

Wiring 8 enters end connector 9, through the coil conductor windings of square, fixed, electro magnetic stator coil 10, thence to fixed solenoid 11, across to fixed solenoid 12, thence to fixed electro magnetic stator coil 13. From there wiring 8 traverses drive shaft 1, to fixed electro magnetic stator coil 14, thence to fixed solenoid 15, across to fixed solenoid 16, (said solenoids shown as dotted lines at rear of fixed electro magnetic stator coils 14 and 17), thence to fixed electro magnetic stator coil 17. From there, wiring 8 continues, via end connector 18, through an electrical load system, back to its entry point at end connector 9.

The axis of each electro magnetic stator coil 10, 13, 14 and 17 is spaced from and substantially transverse to the axis of the rotor, i.e. the axis of the drive shaft The axis of each fixed solenoid 11, 12, 15 and 16 is substantially transverse to a radius of the rotor, or expressed in different terms, the axis of each fixed solenoid 11, 12, 15 and 16 is substantially parallel to the axis of the rotor.

The radially opposed, rotating magnetic forces provided by permanent magnets 2 and 3, will induce current flow within the inner-side conductor windings of fixed electro magnetic coils 10, 13, 14 and 17. Since the polarities of said radially opposed permanent magnets are reversed, said current flow will be alternating.

When the machine is to be used as an electro magnetically boosted flywheel, ooo electrical load distribution may be: o: 10 where said rotating magnetic forces are provided by electro S0: magnetic coils, a battery storage system applies direct current, via slip rings and brushes mounted on drive shaft 1, to said electro magnetic coils *000 and the output from said fixed electro magnetic coils, less the voltage dropped across said fixed solenoids, is applied back to said battenry S 15 storage system, or 0 where said rotating magnetic forces are provided by rotating permanent magnets, or by rotating electro magnetic coils, energised by an "exciter" generator, which is secured to drive shaft 1 and rectifiers, wiring 8 becomes a "closed loop" and fixed solenoids 11, 12, 15 and 16 become said electrical load.

Figure 2 shows a schematic top view of the machine, where permanent magnet 2 is passing between the inner sides of fixed electro magnetic coils 10 and 13.

The dotted lines 19 show the magnetic force pattern surrounding permanent magnet 2. Said moving magnetic force pattern 19 places nmagnetic charges and 21, shown as S and N, on the inner-side conductor windings of fixed electro magnetic coils 10 and 13. Consequently, magnetic charges 22 and 23, shown -6as N and S, will be placed on the outer side of conductor windings of fixed electro magnetic coils 10 and 13.

This effect will cause current flow through wiring 8, in the direction shown by arrow 24 and said current flow will continue, in the same direction, for the duration of permanent magnet 2's passage between fixed electro magnetic coils and 13. The dotted lines 25 and 26 show the magnetic field force pattern around fixed electro magnetic coils 10 and 13. From this, it can be seen that the rear of said electro magnetic field force patterns are in opposition to the rear of magnetic force pattern 19, thereby impeding the forward movement of 10 permanent magnet 2.

I

0* Figure 3 is a schematic top view of the machine, showing the composite magnetic field force patterns 25 and 26 produced around magnetic force pattern 19, when current flows through fixed solenoids 11 and 12, wherein an even compressive magnetic force is applied to the rear of said magnetic force pattern 15 19. In effect, said solenoids act as interpoles.

Since like charges repel and unlike charges attract, said magnetic field force patterns will have the capacity to either, accelerate permanent magnet 2 in the direction of rotation, or to reduce the work required by the driving force, by increasing the torque applied to the drive shaft 1.

Figure 4 is a vertical side view of the machine, showing the configuration of the various components and showing the inclusion of two more permanent magnets 27 and 28, which have reverse polarities to permanent magnets 2 and 3. End connectors 9 and 18 and associated end connectors, are mounted on end connector support frame 29. Fixed electro magnetic coils 10 and 17 are wound around square soft iron frames 30 and 31, which are secured to said support frame 29 by brackets 32, 33, 34 and 35. Brackets 36 and 37 support fixed solenoids 11 and 16. Not shown are conductor slots for extra conductors which may be added to fixed electro magnetic coils 10 and 17.

-7- In the situation shown in Figure 4, the magnetic field force patterns produced by fixed solenoids 11 and 16 will repel permanent magnets 2 and 3 forward, in the direction of rotation and simultaneously, will attract permanent magnets 27 and 28, in the direction of rotation.

It should be noted that, in Figure 4, the radially opposed rotating permanent magnets 2 and 3, have the same polar directions. In this instance, the inputs to the windings of fixed electro magnetic coils 14 and 17 should be reversed, in relation to the inputs to the windings of electro magnetic coils 10 and 13, in order to ensure that current flow through wiring 8 is unidirectional.

I99 999 10 Depending upon a particular requirement for the machine, various combinations and multiples of pairs of fixed electro magnetic coils, fixed solenoids and rotating magnetic forces, may be incorporated.

In the form of the invention, as an electro magnetically boosted flywheel, the *9° invention may be applied to the drive systems of all forms of land sea and air transport, to enhance the performance of a unit of that form of transport.

0 In the form of the invention, where the output of the machine, less the voltage dropped over the fixed solenoids, is applied, via transformers and rectifiers, to a battery storage system, said battery storage system is the energy source for a direct current motor, which is used to drive the invention, by means of a pulley belt and wheels and to propel an electrically powered vehicle. The object of "feeding back" the residual output of said electro magnetic rotating machine is to maintain said battery storage system's charge, thereby extending said electrically powered vehicle's range.

Claims (10)

1. An axial flux electro magnetic rotating machine comprising rotor means having at least one permanent or electro magnet mounted at outer parts of side wall means secured to a drive shaft, said permanent or electro magnet creating rotor magnetic poles, said rotor means rotatable with said drive shaft and said drive shaft rotatable by external means, at least one pair of axially spaced apart electro magnetic stator coils disposed on opposite sides of said rotor means, the axis of each said electro magnetic stator coil being spaced from and substantially transverse to the axis of said rotor means and said rotor means arranged to pass between said electro magnetic stator coils, said electro magnetic stator coils being connected, in series, to axially ":spaced apart fixed solenoids disposed on opposite sides of said rotor magnetic poles, the axis of each said fixed solenoid being substantially transverse to a radius of said rotor means, wherein movement of said rotor :oi t 15 magnetic poles will induce current flow within the inner-side conductor S"windings of said electro magnetic stator coils, said conductor windings being *ii wound in such a direction that said induced current flow will create a composite magnetic field force around said electro magnetic stator coils, said fixed solenoids and said rotor magnetic poles, such that said composite magnetic field is biased to the plane of rotation of said rotor means and the magnetic polarities are capable of accelerating said rotor magnetic poles in the direction of rotation of said rotor means.

2. An electro magnetic rotating machine as defined in claim 1, wherein said electro magnetic rotating machine becomes an electro magnetically boosted flywheel, by continuing the electrical output of said electro magnetic rotating machine, less the voltage dropped across said fixed solenoids, through transformers and rectifiers, through to a battery storage system, thence to slip rings and brushes mounted on the drive shaft of said electro ,nagnetic _I _1 rotating machine, thence to rotating electro magnetic coils, which become said rotor magnetic poles.

3. An electro magnetic rotating machine as defined in claim 1, wherein said electro magnetic rotating machine becomes an electro magnetically boosted flywheel, by enclosing the electrical output of said electro magnetic rotating machine into a "closed loop", encompassing said fixed stator coils and said fixed solenoids, thus ensuring substantially maximum magnetic force is applied across said fixed solenoids and by providing as rotor magnetic poles, o. *either permanent magnets, or electro magnetic coils, energised by the output S 10 from an "exciter" generator, secured to said drive shaft of said rotor means 0 0 "and rectifiers.

4. An electro magnetic rotating machine as defined in claim 1, wherein a battery storage system is the energy source for a direct current motor, which is the driving force for an electrically powered vehicle and wherein, by means of a pulley belt and wheels, said direct current motor's drive shaft is also used to drive said electro magnetic rotating machine's rotor means, and wherein the output of said electro magnetic rotating machine, less the voltage dropped across said fixed solenoids, is applied, through transformers and rectifiers, to said battery storage system, for the purpose of extending the charge "life" of said battery storage system.

An electro magnetic rotating machine as defined in any one of claims 1 to 4, wherein two or more said electro magnetic stator coils and associated fixed solenoids are disposed around the axis of said electro magnetic rotating machine's rotor means.

6. An electro magnetic rotating machine as defined in claim 5, wherein the number of said electro r.,agnetic stator coils and associated fixed solenoids is dependent upon the diameter of said rotor means.

7. An electro magnetic rotating machine as defined in any one of claims 1 to 6, wherein said electro magnetic stator coils are substantially square.

8. An electro magnetic rotating machine as defined in any one of claims 1 to 7, wherein said at least one permanent or electro magnet is mounted in a shaped slot of said side wall means.

9. An electro magnetic rotating machine, as defined in any one of claims 1 to wherein said electro magnetic rotating machine operates substantially as an Salternating current motor or generator. C C*

10. An electro magnetic rotating machine, substantially as herein described, with reference to the accompanying drawings. Sat C" Dated this FIRST day of NOVEMBER 1995. WILLIAM BARRY MACDONALD Applicant Wray Associates Perth, Western Australia Patent Attorneys for the Applicant ABSTRACT An axial flow, electro magnetic rotating machine is describ- ed. The device consists of a rotor drive shaft around which are secured circular side walls (4a and 4b), within which are secured, in shaped slots, radially opposed rotor magnetic poles (2 and Current flow, as shown by arrow induced by the movement of said rotor magnetic poles, between diametrical pairs of axially spaced apart electro magnetic stator coils (10, 13, 14 and 17), will energise the diametrical, axially spaced apart fixed solenoids (11, 12 15 and 16) and the transverse magnetic force provided by said fixed solenoids, will evenly compress the rear of the magnetic force pattern (19) surrounding rotor magnetic pole and counter balance, as a form of interpole, the mag- netic field force patterns (25 and 26) formed at the rear of electro magnetic stator coils (10 and 13). The resultant composite, magnetic field force patterns (25 and 26) then become biassed to said rotor magnetic pole's plane of rotation and will accelerate said rotor magnetic poles in the direction of rotation While the machine may funct- ion, substantially, as an alternating current motor or gen- erator, its preferred functions are as an electro magnet- Sically boosted flywheel, or as a battery storage system recharger. a .e 7 -3 i* *o *4 *4 4 44 6 44 ^i