WO1991004603A1

WO1991004603A1 - Improved d.c. motor

Info

Publication number: WO1991004603A1
Application number: PCT/AU1989/000393
Authority: WO
Inventors: Walter Hanson
Original assignee: Walter Hanson
Priority date: 1989-09-12
Filing date: 1989-09-12
Publication date: 1991-04-04

Abstract

An improved D.C. motor through the use of permanent-magnets on the rotor as well as on the stator combined with electro-magnets on said stator. The power of the attraction of north-south poles and the repulsion of the equal poles are utilized by bridging the two powers through direct current resulting in a saving of energy and the use of the three powers: attraction, bridging energy, and repulsion all three forces are working in the same direction.

Description

IMPROVED D.C. MOTOR l.The object of this invention is to provide a more economical Direct Current Motor, that will give through the use of permanent-magnets on the rotor and a combination of permanent-magnets and electro- 5. magnets on the stator a better output than conven¬ tional D.C.Motors. It is well known, that the use of permanent-magnets in D.C.Motors have advantages in application in windcreen wiper motors for cars instead of copper windings of the stator in D.C. 10.Motors. The Novelty of this invention is, that the permanent-magnets of said rotor and said stator have both a force-field without needing any energy nor do they produce any heat, in this application it is possible to use the attraction of the opposite

15. poles of the permanent-magnets and the repulsion of the equal poles by adding a bridging force of Direct Current in form of an electro-magnet placed in front of the permanent-magnet of the stator. By utilising the Force F 1,= attraction, the

20. opposite poles, the Force F 2,= Bridging force provided by the electro-magnet in front of the Permanent-magnet of the stator, the Force F 3,= repulsion, through the equal poles of the perma¬ nent-magnets on the rotor and the stator as

25. indecated on drawing No.l.

The position of the permanent-magnets on the rotor shown on drawing No.2. is in between the two permanent-magnets of the stator being turned ^• in the direction of the arrow by the attaction of 30. he north-pole of magnet A since the south-pole is facing it, while the north-pole of the permanent- magnet on the rotor is being repulsed by the north- pole of the stator magnet facing same. The permanent-magnets on the rotor are placed in

35. equal distances around the outside of the disc and have the same number of permanent-magnets on the stator. By this arrangement the full distance of the force-field between the permanent-magnets on the rotor and the permanent-magnets of the stator

40. are being employed, the only energy needed is the Direct Current applied when the permanent-magnets of the rotor are opposite the electro-magnet of the stator which is backed by the permanent-magnet being part of the stator arrangement.

45. To fully understand the principle of the inven¬ tion, I now decribe the invention supported by the drawings supplied.

To be able to utelize the increased power of the permanent-magnets of todays improved strength

50. the benefit of a larger diameter is threefold.

Firstly, the number of magnets can be multiplied, secondly,the leverage of the motor is greatly increased by the diameter of the rotor, thirdly, since the energy only needs to be applied

55. at the bridging point while the permanent-magnet of the rotor is opposite the electro-magnet of the stator, the degree of energy application is only half by twice the diameter of the rotor. The energy consumption in ampere per hour is the 60. same by higher output through more permanent- magnets on the rotor.

Since the permanent-magnets of the rotor are placed on the outer rim, the weight of those magnets is working like a flywheel, that will 65. pull its own weight through the power of the permanent-magnets, the power 1- the attraction the power 2- the bridging energy pushing in the same direction and power 3- the repulsion all three forces are working in the same direction 70. In drawing No.3, three rotors are placed on one shaft with the magnets stepped in a way to have a constant push of equal force and a continual flow of the supplied energy through the electro¬ magnets on the stator. 75. Another prefered feature is a motor with one permanent-magnet less on the rotor than on the stator, having the effect to use only the energy for one electro-magnet at a time while all other rotor magnets are in between the 80. magnets of the stator. A constant even thrust is the result of this single rotor motor. The application for this economical D.C.MOTOR is in every field where D.C.MOTORS are applied today, like AIRC0NDITI0NING ; PUMPS; MOTOR-CARS 85. BOATS; AIR-CRAFTS; SPACE-CRAFTS; GENERATOR; BIKES and TRAINS: The body of the rotor and the casing of the motor are of a non-magnetic material, a plastic injection mouldet or aluminum casting. As in the drawing indecated the permanent- magnets are showing the magnetisation through S=Southpole, N=Northpole, PM=Permanent-magnet EM=Electro-magnet, NM=Non-magnetic-material.

Claims

The claims defining the invention are as follows:

Claim 1. A D.C.Motor with permanent-rmagnets combined with electro-magnets on the stator and permanent-magnets on the rotor, the rotor turning around a central shaft mounted on two or more points with bearings to turn freely around its centre. The permanent-magnets are placed on the outside of the rotor having the magnetised poles facing the direction of turn, and the stator- magnets facing towards the centre being placed behind the electro-magnets being kept in place by its moulded outside cover. The number of the rotor-magnets is the same as the number of magnets on the stator with its electro-magnets in front of the permanent-magnets. The rotor body being of a non-magnetic material not to interfear with the force-field of the magnets, see draing 1.

Claim 2. The apparatus of claim 1. With an enlarged diameter and an increased number of permanent- magnets the power output as well as the leaverage will be increased.

Claim 3. The apparatus decribed in claim 1 and 2 with the number of rotors encreased and placed on the shaft with equal spaces between the per¬ manent-magnets, so that the bridging-point is reached one after another to have a continoues energie-flow with a constant thrust.See drawing 3.

Claim 4. The apparatus of claim 1 and 2 with the number of magnets on the rotor one less than the number of magnets on the stator, in this case the rotor-magnets reach the bridging point of the electro-magnets in front of the permanent-magnets on the stator one after another to have even flow of energy. See drawing Nr .5.

Claim 5. The apparatus decribed in claim 1, 2, 3, and 4, with the stator on the inside of the motor and the rotor on the outside of the same.

Claim 6. The apparatus described in claims 1, 2, 3, 4, and 5 with the poles of the permanent- magnets placed the opposite way to the way shown in drawing 5.