AU720413B1 - The pulsating electric current generator - Google Patents

Description

-1- P/00/0011 Regulation 3.2

AUSTRALIA

Patents Act 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT

ORIGINAL

Name of Applicant: Actual Inventor: Address for service in Australia: Wiktor LAPCIK as above CARTER SMITH BEADLE 2 Railway Parade Camberwell Victoria 3124 Australia Invention Title: PULSATING ELECTRIC CURRENT GENERATOR The following statement is a full description of this invention, including the best method of performing it known to us PULSATING ELECTRIC CURRENT GENERATOR Technical Field of the Invention This invention relates to an electric current generator, and more particularly to a commutatorless electric generator for providing a pulsating direct current.

Background of the Invention In conventional electric current generators, there is at least a single coil revolving around a central axis in a bipolar magnetic filed. When such a coil revolves, one side of it enters the magnetic filed in front of one magnetic pole cutting the lines of force and hence inducing an electric current in the coil which can be applied to a circuit. The coil continues to revolve or rotate and passes the lowest point of its circular rotating and commences to rise in front of the opposed polarity pole of the magnet. Consequently, electric current is induced but in the opposite direction.

To produce direct current (DC) or current in one direction various known techniques are employed. For example, using slip rings in AC generators with rectifiers. In the case of DC generators, commutators are used to capture induced current in one direction. The main drawback of using commutators/brushes is the undesirable effect of the arcing that maybe present. This is particularly so, at high speed rotation of the rotor.

Summary of the Invention It is therefore desirable to provide an improved pulsating direct current generator without employing commutators or rectifiers and which does not suffer from the drawback of arcing.

In one aspect of the invention, there is provided a commutatorless electric current generator comprising at least one pair of magnetic poles, at least one conductive coil rotatable between said pair of magnetic poles and an external electric circuit connected to said at least one coil, wherein the arrangement of the magnetic poles and the at least one rotatable coil is such that a pulsating direct 7 February 2000 current is induced in the same direction in the rotatable coil as it moves past each of said magnetic poles.

In this way current is generated to flow in one direction only, which alleviates the problem of using commutators which can cause arcing and without using rectifiers.

In a preferred form, the at least one coil is rotatable in a magnetic filed between a pair of magnetic poles of opposite polarities.

The coil may be twisted into a figure of eight having a pair of coil parts, so that current is induced in each coil part in the same direction as each coil part passes one of the poles.

At least one pair of coils may be provided which are rotatable about an axis of rotation between said coils, such that as the coils rotate around said axis in the magnetic field, a current is induced in the same direction in each coil as it passes each of the poles.

In an alternative form of the invention, the at least one coil may be rotatable between at least one pair of magnetic poles of the same polarity.

The at least one coil may comprise a plurality of coils where each coil is rotatable between said pair of magnetic poles of the same polarity.

The magnetic poles are preferably provided by a plurality of horseshoe magnets having poles of the same polarity facing each other. Alternatively, the magnetic poles may be provided by spiral electromagnets.

In a further preferred form of the invention, the plurality of coils provided are connected to the external circuit by slip rings. The coils can also be provided on a polarised rotatable axle which forms an electrical connection between the coils and the external circuit.

Description of the Preferred Embodiment The invention will now be described with reference to the one drawing.

The drawing illustrates an embodiment of the invention in its simplest form.

A single coil 1 as illustrated, is twisted by 1800 to form a figure eight shape having two coil parts or lobes. Each conductor end 2 of coil 1 is connected to an external JRG:TOC:#33482.RS 1 7 February 2000 circuit 4 via slip rings 3. Two opposed magnets with a north pole 5 and south pole 6 are placed adjacent each lobe of the twisted coil 1, as shown in the drawing.

In operation, the coil 1 rotates about an axis 7. As each lobe passes the north and the south 6 poles of the magnet, current is induced which can be measured with an ammeter A. As illustrated, in this configuration, as the each lobe of the coil 1 cuts the lines of forces, current is induced in one direction only.

The above can similarly be effected by using two separate coils with slip rings. In a practical application, there will generally be more than one pair of coils in an armature. Therefore, if it is desired to produce a higher current, then the coils in the armature can be connected in parallel. In a series arrangement, higher voltage is produced.

In an alternative form, one or more coils 1 can be used with spiral single electromagnets or bipolar horseshoe magnets. In this application, the coil 1 rotates around the axis 7, except, in the horseshoe or electromagnet arrangement, the rotation is between like poles. Therefore, in the drawing, the magnets would either both have S 6 or N 5. This has the same effect of inducing current in a single direction. The construction of the spiral electromagnets may be as described below.

The spiral electromagnet is formed where a coil is wound in the form of Archimedeiian or any other suitable spiral. The winding is from left to right as seen in a front view. A direct electric current is connected with a negative at the centre and a positive at the perimeter of the wound coil. In this way, the coil behaves like a two-dimensional electromagnet with the front side having a north polarity and the rear, south. The construction material of such spiral magnets can be typically made from copper and/or iron perhaps other materials depending on the particular requirements. Furthermore, the surfaces of the spirals can be concave or convex. The electromagnets can be made to have stronger electromagnetic characteristics by adding more spirals one behind the other. This of course is useful for generating high amounts of current or voltage depending on whether they are series or parallel construction.

Other construction variations include insulating some of the spirals and S leaving others bare. This will give various effects which is particularly useful in 7 February 2000 nuclear applications as well as chemical, metallurgical and biological processes.

Typical magneto-active materials used in making a magnet or electromagnet for this purpose include oxides of iron, nickel, cobalt or rare earth. One of the best known magneto-active materials are ferrites such as MOFe 3 0 4 where M is a divalent metal ion such as previously stated. The most effective of these magnetides is Fe 3

O

4 Other processes of constructing are well known and will not be described further.

In a further alternative embodiment, the slip rings can be replaced with a polarised axle. Each hub of the axle functions like a slip-ring and is thus electrically connected to the external circuit.

The generator described, using binary coils or single coil, can feed their own fields unlike alternating dynames which have to be supplied from a separate direct current generator. One useful application is replacing a lead battery in a vehicle.

Once the motor has been started using a standard battery, such a generator can then take over the functions of the battery.

The invention described has the advantage of being communtatorless and hence prevents arcing. Further, the construction is simplified and its application is not limited to any particular environment, whether using permanent magnets (single coil) or electromagnets (multiple coils).

It will be appreciated that pulsating direct current electric generators in accordance with the invention has a wide variety of applications. For instance, the pulsating electric current generators can provide the sufficient quality and kind of electricity for a motor car when its motor is running, but to start the motor a dry cell battery is required for a very short time.

Thus the starting switch may close the dry cell battery circuit starting the ignition of the motor, and as soon as the motor starts running and turning the pulsating current generator, the generator's current though the relay automatically breaks the dry cell battery circuit to the ignition, and the low-tension generator's current can start flowing for the ignition and the rest of the car's requirements.

Nowadays, technically advanced ignition systems are electronically JRG:TOC:#33482.RSI 7 February 2000 controlled, but they use the low-tension current from lead batteries in the same way as the old-fashioned motors which are here described as an example. In this case the current from the pulsating current generator here can be supplied to the primary windings of the coil through the contact breaker driven mechanically from the engine.

Since modifications within the spirit and scope of the invention may be readily effected by persons skilled in the art, it is to be understood that the invention is not limited to the particular embodiment, by way of example herein above.

JRG:TOC:#33482.RS1 7 February 2000

Claims (11)

1. A commutatorless electric current generator comprising at least one pair of magnetic poles, at least one conductive coil rotatable between said pair of magnetic poles and an external electric circuit connected to said at least one coil, wherein the arrangement of the magnetic poles and the at least one rotatable coil is such that a pulsating direct current is induced in the same direction in the rotatable coil as it moves past each of said magnetic poles.

2. A generator according to claim 1 wherein the at least one coil is rotatable in a magnetic field between a pair of magnetic poles of opposite polarities.

3. A generator according to claim 2 wherein at least one coil is twisted into a figure of eight having a pair of coil parts so that current is induced in each coil part in the same direction as each coil part passes one of the poles.

4. A generator according to claim 2 wherein at least one pair of coils are provided which are rotatable about an axis of rotation between the coils, so that as the coils rotate around said axis in the magnetic field, a current is induced in the same direction in each coil as it passes each of the poles.

A generator according to claim 1 wherein said at least one rotatable coil is rotatable between at least one pair of magnetic poles of the same polarity.

6. A generator according to claim 5 wherein a plurality of coils are provided, each coil being rotatable between a pair of magnetic poles of the same polarity.

7. A generator according to claim 6 wherein the magnetic poles are provided by a plurality of horseshoe magnets arranged with poles of the same polarity facing each other. JRG:TOC:#33482.RS 7 February 2000

8. A generator according to claim 6 wherein the magnetic poles are provided by spiral electromagnets.

9. A generator according to any one of the preceding claims wherein a plurality of coils are provided which are connected to the external electric circuit by slip rings.

A generator according to any one of claims 1 to 9 wherein a plurality of coils are provided on a polarised rotatable axle which forms an electrical connection between the coils and the external electrical circuit.

11. A pulsating electric current generator substantially as hereinbefore described with reference to the accompanying drawings. DATED: 7 February, 2000 CARTER SMITH BEADLE Patent Attorneys for the Applicant: WIKTOR LAPCIK 7 February 2000