WO2013005078A1

WO2013005078A1 - Electromagnetic - permanent magnet device

Info

Publication number: WO2013005078A1
Application number: PCT/IB2011/052985
Authority: WO
Inventors: Alejandro BOSCO
Original assignee: Iuvo Tech Inc.
Priority date: 2011-07-05
Filing date: 2011-07-05
Publication date: 2013-01-10

Abstract

The present invention describes new and unique electromagnetic device design architecture. This new architecture can be implemented in several different ways, most which are all illustrated and described in detail. This electromagnetic device 200' design can be constructed with common materials, but its construction utilizes a design in which an electric coil 201' wiring is wrapped around a permeable magnetic core 202'. A permanent magnet 203' with two secondary permeable magnetic cores 206' one on each side of its magnetic poles, distant by a constant air gap 207' with respect to the electric coil core 202' and a magnetically permeable piece 204' distant by a constant air gap 205' with respect to the cores 202', 206'. Both electric coil 201' and permanent magnet 203' are magnetically parallel with respect to each other. This electromagnetic device 200' is capable of producing and bending or shifting a magnetic field from within its own magnetic permeable cores 202', 206' and permanent magnet 203' to an external permeable piece 204' causing motive force of said permeable piece 204', when the electric coil 201' is energized. Also when the electric coil 201' is switched off, it is capable of recovering energy during the return of the magnetic field to its initial state, and completely release the external permeable piece 204' from any force. This architecture introduces a whole new benchmark for the efficiency levels in electromagnetic devices designs mostly intended to be used in electric motors but not limited to it.

Description

ELECTROMAGNETIC - PERMANENT MAGNET DEVICE

The present invention is related to an electromagnetic device, more specifically to highly efficient electromagnetic devices, using permanent magnet/s to increase the electro magneto motive force produced by the electromagnet/s utilizing a unique design with conventional materials.

Background Art

A motor in its most simple explanation is a device that uses electrical energy to produce mechanical energy. Mechanical energy is a common description phrase for the movement of a physical object. The electrical motor uses the attraction and repulsion properties of magnetic fields to produce this force of movement of an object. These magnetic fields could be produced by electromagnets, magnets or a combination of both. The electrical motor uses the property in that a magnetic field is created when electrical current flows through a conductor. The most common example of mechanical output in an electrical motor could be the use of radial torque to rotate a rotor. But as the motor rotates, it also acts as a generator and generates electrical energy. While the motor is connected to a power supply that also has its own resistance, by Len'z law the electrical energy generated by the motor coil will oppose the change that created it. If the motor is not driving a load, it will reach its maximum speed. This will be determined by the motor's generated electrical energy which will almost be balanced with the input voltage. At this state very little current will flow through the motor's coil. If the motor is driving a heavy load, the rotational speed will decrease and the electrical energy generated will be less than the input voltage, as a result more current will flow through the motor coil. The resulting electric current is the actual electrical energy that is converted to the mechanical energy that drives the load. As shown in Fig.12, a simple diagram illustration shows how a physical force is created with the interaction of electromagnetic fields. Electric motors provide mechanical energy for many applications which range from transportation, to household appliances, to many industrial needs that require physical force.

Technical Problem

Like in a conventional electrical motor design, the movement of electromagnetic poles or magnetic poles in relation to each other creates electrical energy that reduces the current that flows through the coils of the electromagnetic poles, thereby reducing their magnetic field. This limits the maximum potential torque and speed of a motor. In all current electric motors designs, the creation of electrical energy is difficult to minimize. As a result, this limits the maximum potential efficiency in the conversion of electrical energy to mechanical energy.

This problem is also present in most of the electromagnetic devices where movement between the pieces of magnetic and/or electromagnetic poles is needed.

Technical Solution

The present invention introduces several design architectures that all utilize a construction arrangement where electric coil(s) wiring is wrapped around a magnetic permeable core, this core also contain a permanent magnet(s), and a magnetically permeable piece(s) distanced by an air gap.

Both, permanent magnet(s) and electric coil(s), magnetically parallel respect to each other.

This new unique architecture arrangement allows the motion of the magnetic permeable piece(s) with respect to the core without producing changes on the magnetic flux inside the core that could affect the electric coil(s) and the resulting electrical current; sustaining the current flowing through the electric coil(s) and its magnetic field.

When the electric coil(s) is energized, the magnetic permeable piece(s) is strongly attracted by the sum of both magnetic source on the core, electric coil(s) and permanent magnet(s).

More over when electrical current is disconnected from the electric coil(s) and no more magnetic field(s) is produced by the electric coil(s) the magnetic permeable piece(s) is completely release from the magnetic flux influences. This happens due that the magnetic flux from the permanent magnet(s) get back to stage one, trapped in the core where there is less magnetic reluctance than the reluctance offer by the air gap in between said core and the magnetic permeable piece(s).

Also at the moment that the electric current is disconnected from the electric coil(s), electric energy generated from the collapsing of the electric coil(s) magnetic field could be recaptured, recycled and reused.

Furthermore , this energy generated is reinforced by the magnetic field changes from the permanent magnet(s) getting back to the initial stage inside of the core, where its magnetic field will stay trap until the electric coil will be energized again.

The abilities made by this electromagnetic device design, reach a much higher level of efficiency in the resulting speed, torque and electric current utilization and recovery.

Advantageous Effects

This present invention introduce a new construction architecture in electromagnetic devices design that increases the performance of converting electrical energy to electromagnetic static or motive forces.

Description of Drawings

Figure 1a shows a cross section of a variant of the best embodiments of the present invention. This electromagnetic device 100 comprises one electric coil 101, one magnetic permeable core 102, two permanent magnets 103, and one magnetic permeable piece 104 distant by an air gap 105. The magnetic permeable core 102 presents an 'E' shape. The electric coil 101 is wrapped on the centre leg of said 'E' core 102. On the open side of said 'E' and distant by and air gap 105 the magnetic permeable piece 104 is placed. The shape of the magnetic permeable piece 104 and the core 102 has to be made to allow a constant air gap 105 between both pieces during motion. In between the legs of the 'E' shape of said core 102, the permanent magnets 103 are inserted. This arrangement causes the magnetic flux of the permanent magnets 103 to remain trapped in the core 102 during the off stage of the electric coil 101.

Figure 1b shows a front view of the electromagnetic device described in Figure 1a.

Figure 2a shows the first embodiment of the present invention in it most simple design. This electromagnetic device 200 comprises one electric coil 201, one magnetic permeable core 202, one permanent magnet 203, and one magnetic permeable piece 204 distant by an air gap 205. The magnetic permeable core 202 presents a 'C' shape. The electric coil 201 is wrapped on the vertical portion of said 'C' core 202. On the open side of said 'C' core 202 and distant by and air gap 205, the magnetic permeable piece 204 is placed. The shape of the magnetic permeable piece 204 and the core 202 has to be made to allow a constant air gap 205 between both pieces during motion. In between the legs of the 'C' core 202, the permanent magnet 203 is inserted. This arrangement causes the magnetic flux of the permanent magnet 203 to remain trapped in the core 202 during the off stage of the electric coil 201.

Figure 2b shows another embodiment of the invention where the electromagnetic device 200' comprises one electric coil 201', one magnetic permeable main core 202', one permanent magnet 203', two permeable magnetic secondary cores 206', one magnetic permeable piece 204' distant by an air gap 205' and two secondary air gaps 207'. The magnetic permeable main core 202' presents a 'C' shape. The electric coil 201' is wrapped on the vertical portion of said 'C' core 202'. On the open side of said 'C' core 202' and distant by and air gap 205', the magnetic permeable piece 204' is place. In between the legs of the 'C' core 202', the permanent magnet 203' with the two secondary cores 206', one on each side of its magnetic poles is placed. This group of pieces is distant with respect to the legs of the 'C' core 202' by the secondary air gaps 207'. This whole group of pieces integrated by the main core 202' with its electric coil 201' containing the two secondary pieces 206' and the permanent magnet 203', with the correspondent air gap 207'; is distanced by a constant air gap 205' with respect to the permeable piece 204' on the side. The shape of the magnetic permeable piece 204', the permeable magnetic main core 202'and secondary permeable magnetic cores 206' has to be made to allow for a constant air gap 205' between said cores 202' and 206' and the permeable magnetic piece 204'during motion. This design introduces a secondary air gap 207', which provides the ability to reduce the coercivity imposed by the permanent magnet 203' to the magnetic field produced by the electric coils 201', thereby facilitating the bending or shifting of the magnetic field from the permanent magnet 203' to the magnetic permeable piece 204'; allowing the use of strong permanent magnets.

Figure 2c shows another variant embodiment of the present invention in it most simple design. This electromagnetic device 2000 comprises one electric coil 2010, one magnetic permeable core 2020, one permanent magnet 2030, and one magnetic permeable piece 2040 distant by an air gap 2050. The magnetic permeable core 2020 presents an inverted 'C' shape in comparison with Fig 2a. The electric coil 2010 is wrapped on the vertical portion of said inverted 'C' core 2020. On the closed side of said inverted 'C' core 2020 and distant by and air gap 2050, the magnetic permeable piece 2040 is placed. The shape of the magnetic permeable piece 2040 and the core 2020 has to be made to allow a constant air gap 2050 between both pieces during motion. In between the legs of the inverted 'C' core 2020, the permanent magnet 2030 is inserted. This arrangement causes the magnetic flux of the permanent magnet 2030 to remain trapped in the core 2020 during the off stage of the electric coil 2010. Figure 2d shows another embodiment of the invention where the electromagnetic device 2000' comprises one electric coil 2010', two magnetic permeable cores 2020', one permanent magnet 2030', one permeable magnetic secondary core 2060', one magnetic permeable piece 2040' distant by an air gap 2050' and two secondary air gaps 2070'. The magnetic permeable cores 2020' presents a 'C' shape, when attached with the permanent magnet 2030'. The electric coil 2010' is wrapped on the vertical portion of the secondary core 2060'. On the open side of said 'C' and distant by and air gap 2050', the magnetic permeable piece 2040' is placed. In between the legs of said 'C', the electric coil 2010' with the secondary core 2060', is placed. This group of pieces is distant with respect to the legs of the 'C' by the secondary air gaps 2070'. This whole group of pieces integrated by the main cores 2020' with the permanent magnet 2030' containing the secondary core 2060' and the electric coil 2010', with the correspondent air gap 2070'; is distanced by a constant air gap 2050' with respect to the permeable piece 2040' on the side. The shape of the magnetic permeable piece 2040', the permeable magnetic main cores 2020'and secondary permeable magnetic core 2060' has to be made to allow for a constant air gap 2050' between said cores 2020' and 2060' and the permeable magnetic piece 2040'during motion. This design also introduces a secondary air gap 2070', which provides the ability to reduce the coercivity imposed by the permanent magnet 2030' to the magnetic field produced by the electric coils 2010', thereby facilitating the bending or shifting of the magnetic field from the permanent magnet 2030' to the magnetic permeable piece 2040'; allowing the use of strong permanent magnets.

Figure 3a shows another variant embodiment of the present invention. This electromagnetic device 300 comprises two electric coils 301, one magnetic permeable core 302, one permanent magnet 303, and one magnetic permeable piece 304 distant by an air gap 305. The magnetic permeable core 302 presents a 'C' shape. The electric coils 301 are wrapped on the horizontal portion of said 'C' core 302. On the open side of said 'C' core 302 and distant by and air gap 305, the magnetic permeable piece 304 is placed. The shape of the magnetic permeable piece 304 and the core 302 has to be made to allow a constant air gap 305 between both pieces during motion. In between the legs of the 'C' core 302 the permanent magnet 303 is inserted. This arrangement causes the magnetic flux of the permanent magnet 303 to remain trapped in the core during the off stage of the electric coil 301. This variant could be a solution for certain designs.

Figure 3b shows another embodiment of the invention where the electromagnetic device 300' comprises two electric coils 301', one magnetic permeable main core 302', one permanent magnet 303', two permeable magnetic secondary cores 306', one magnetic permeable piece 304' distant by an air gap 305' and two secondary air gaps 307'. The magnetic permeable main core 302' presents a 'C' shape. The electric coils 301', are wrapped on the horizontal portion of said 'C' core 302'. On the open side of said 'C' core 302' and distant by and air gap 305', the magnetic permeable piece 304' is placed. In between the legs of the 'C' core 302', the permanent magnet 303' with the two secondary cores 306', one on each side of its magnetic poles, are placed. This group of pieces is distanced with respect to the legs of the 'C' core 302' by the secondary air gaps 307'. This whole group of pieces integrated by the main core 302' with its electric coils 301', containing the two secondary cores 306' and the permanent magnet 303', with the correspondent air gap 307'; is distanced by a constant air gap 305' with respect to the permeable piece 304' on the side. The shape of the magnetic permeable piece 304', the permeable magnetic main core 302'and secondary permeable magnetic cores 306' has to be made to allow for a constant air gap 305' between said cores 302' and 306' and the permeable magnetic piece 304'during motion. This design also introduces a secondary air gap 307', which provides the ability to reduce the coercivity imposed by the permanent magnet 303' to the magnetic field produced by the electric coils 301', thereby facilitating the bending or shifting of the magnetic field from the permanent magnet 303' to the magnetic permeable piece 304'; allowing the use of strong permanent magnets.

Figure 4 shows one of the embodiments of the present invention applied to a linear motion device. This device 400 comprises a sequence of electromagnetic devices 410. Each one of these electromagnetic devices as explained in Fig.1a, b comprises one electric coil 401, one magnetic permeable core 402, and two permanent magnets 403. The difference with respect to Fig 1a, b is the number of magnetic permeable piece(s) 404 distant by an air gap 405, which is determined by the design needs. The magnetic permeable piece(s) 404 is shared between the subsequent devices. The magnetic permeable core 402 presents an 'E' shape. The electric coil 401 is wrapped on the centre leg of said 'E' core 402. On the open side of said 'E' core 402 and distant by and air gap 405, the magnetic permeable piece(s) 404 is placed. The shape of the magnetic permeable piece(s) 404 and the core(s) 402 has to be made to allow a constant air gap 405 between both pieces during motion. In between the legs of the 'E' core 402 the permanent magnets 403 are inserted. This arrangement causes the magnetic flux of the permanent magnets 403 to remain trapped in the core during the off stage of the electric coil 401.

Figure 5 shows one of the embodiments of the present invention applied to a rotary motion device. This device 500 has a sequence of electromagnetic devices 510. Each one of these electromagnetic devices as explained in Fig.1a, b comprises one electric coil 501, one magnetic permeable core 502, and permanent magnets 503. The difference with respect to Fig 1a, b is the number of magnetic permeable piece(s) 504 distant by an air gap 505, which is determined by the design needs. The magnetic permeable piece(s) 504 is shared in between the subsequent devices. The magnetic permeable core presents an 'E' shape. The electric coil 501 is wrapped on the centre leg of said 'E' core 502. On the open side of said 'E' core 502 and distanced by and air gap 505, the magnetic permeable piece(s) 504 is placed. The shape of the magnetic permeable piece(s) 504 and the core(s) 502 has to be made to allow a constant air gap 505 between said pieces during motion. In between the legs of the 'E' core 502, the permanent magnets 503 are inserted. This arrangement causes the magnetic flux of the permanent magnets 503 to remain trapped in the core during the off stage of the electric coil 501.

Figure 6a shows a cross section of one of the best embodiments of the present invention. This electromagnetic device 600 comprises one electric coil 601, one magnetic permeable core 602, one permanent magnet 603, and one magnetic permeable piece 604 distant by an air gap 605. The magnetic permeable core 602 in the cross section presents an 'E' shape. The electric coil 601 is wrapped on the centre leg of said 'E' core 602. On the open side of said 'E' core 602 and distant by and air gap 605, the magnetic permeable piece 604 is placed. The shape of the magnetic permeable piece 604 and the core 602 has to be made to allow a constant air gap 605 during the motion of the said magnetic permeable piece. In between the legs of the 'E' core 602, the permanent magnet 603 is inserted. This arrangement causes the magnetic flux of the magnets to remain trapped in the core 602during the off stage of the electric coil 601. The advantage of this design is to completely surround the electric coil 601 with the magnetic permeable core 602, inducing the whole magnetic field that the coil can produce.

Figure 6b shows a front view of the electromagnetic device described in Figure 6a.

Figure 6c is one of the best embodiments of the invention as shown wherein the electromagnetic device 6000 comprises one electric coil 6010, one magnetic permeable main core 6020, two permanent magnet 6030, four permeable magnetic secondary cores 6060, one magnetic permeable piece 6040 distant by an air gap 6050 and four secondary air gaps 6070. The magnetic permeable main core 6020 presents an 'E' shape. The electric coil 6010 is wrapped on the center leg of said 'E' core 6020. On the open side of said 'E' core 6020 and distant by and air gap 6050, the magnetic permeable piece 6040 is placed. In between the legs of the 'E' core 6020, the permanent magnets 6030 with the secondary cores 6060, one on each side of its magnetic poles, are placed. This group of pieces is distanced with respect to the legs of the 'E' core 6020 by the secondary air gap 6070. This whole group of pieces integrated by the main core 6020 with the electric coil 6010 containing the four secondary cores 6060 and the permanent magnets 6030, with the correspondent air gaps 6070; is distanced by a constant air gap 6050 with respect to the permeable piece 6040 on the side. The shape of the magnetic permeable piece 6040, the permeable magnetic main core 6020 and secondary permeable magnetic cores 6060 has to be made to allow for a constant air gap 6050 between said

cores

6020 and 6060 with respect to the permeable magnetic piece 6040 during motion. This design also introduces a secondary air gap 6070, which provides the ability to reduce the coercivity imposed by the permanent magnet 6030 to the magnetic field produced by the electric coils 6010, thereby facilitating the bending or shifting of the magnetic field from the permanent magnet 6030 to the magnetic permeable piece 6040; allowing the use of strong permanent magnets.

Figure 6d shows a front view of the electromagnetic device describe in Figure 6c.

Figure 7a shows an example of a circuit that allows for the sequence of electromagnetic devices forming a motion device either linear or rotary, to be use with 3 phases AC electrical current, by using an electronic switching method.

Figure 7b shows an example of a circuit that allows for the sequence of electromagnetic devices forming a motion device either linear or rotary, to be use with 3 phases AC electrical current, by using an electronic rectifier method.

Figure 7c shows a reference of the resulting 3 phase electrical current after being switched or rectified.

Figure 8 shows the most common and used DC electronic switching system. This system allows for the storage of energy recovered by a rectifier.

Figure 9 shows a DC electronic switching system, with the capacitors that store the recovered electrical energy are connected to be the power source of the subsequent switching circuit and fully isolated from the power supply.

Figure 10 shows an example of a simplified version of the system shown in Fig. 9. It is used where the ground of the power supply can be shared and connected to the negative side of the capacitor that stores the recovered energy.

Figure 11 shows an example of a simple electronic switching system with recovery energy system, semi isolated, plus and extra switch to discharge the capacitor that holds the recovered energy, back to the power source if needed.

Figure 12 shows an example of prior art, related to a AC permanent magnet motor where motor 1201 is comprise by the

magnetic poles

1203N and 1203S forming the stator 1220, and a rotor 1207. A current is passed through the coil in the rotor 1207, and the interaction of the magnetic poles between the

magnetic poles

1203N, 1203S on the stator 1220 with the magnetic poles produced in the coil on the rotor 1207; forces the rotational movement of rotor 1207 with respects to the stator 1220. Since the current is alternating, the motor will run only at the frequency of the sine wave of the power source 1250, that of which the motor is connected to.

Best Mode

The ideal is shown in Fig. 6c, 6d where a magnetic permeable core 6020 can completely surround the electrical coil 6010, capturing the whole magnetic field resulting from it. In this case the design will achieve its maximum performance with respect to physical dimensions and electrical energy converted. It is also showing the secondary air gaps 6070 between the secondary cores 6060 and the main core 6020. This facilitates the magnetic field produced by the electrical coil 6010 to overcome the magnetic field of the permanent magnets 6030, due that there is no saturation on said secondary air gaps 6070 so minimum coercivity is exhibited. Once the level of magnetic field on the main core 6020 reach the strength to create more magnetic reluctance to the magnetic field of the permanent magnets 6030 than the reluctance offered from the air gap 6050 between the

cores

6020, 6060 and the magnetic permeable piece 6040; then the magnetic field from the permanent magnets 6030 is bent and/or shifted toward the magnetic permeable piece 6040.

Mode for Invention

For all applications where an electromagnet is needed and the utilization of electrical energy is important, the present invention will allow for greater performance in the conversion of electrical energy to mechanical energy.

Industrial Applicability

The present invention applies to any possible application where the use of electromagnetic, static or motive force with highly efficiency electrical current rate is needed.

Sequence List Text

Claims

An electromagnetic device comprising:

A magnetic permeable core.

A permanent magnet.

An electric coil wiring wrapped around said core.

A magnetic permeable piece distant by a constant air gap with respect to said core.

Said core contains the permanent magnet, and the electric coil.

Said core shaped to have on one half sides both poles of the permanent magnet physically connected to and being the core for the electric coil, where the orientation of the permanent magnet and the electric coil is established to be parallel in magnetic polarity.

Said core shaped to have on the other half side physical extensions of the electric coil magnetic poles, also being the permanent magnet poles, without interconnecting said poles.

A special geometry pattern where the area of the cross section of the core where the electric coil is located in said core, is equal to or greater than the area of the permanent magnet pole side.

Said core having a special geometry pattern where the area of the extensions on the side of the core exposed to the magnetic permeable piece distant by an air gap is equal to or greater than the area of the permanent magnet pole side.

A special geometry pattern where the length of the air gap between said core and the magnetic permeable piece; is equal to or greater than any air gap between said permanent magnet and said core.

Said magnetic permeable piece distant by an air gap with respect to said core, is located on the half side of said core where the extensions of the poles of the electric coil and permanent magnet are located, being opposed to the core side where the electric coil is placed.
An electromagnetic device according to claim 1 wherein:

Said magnetic permeable piece distant by an air gap with respect to said core, is located on the half side of said core where the extensions of the poles of the permanent magnet and electric coil are located, being opposed to the core side where the permanent magnet is placed.
An electromagnetic device comprising:

A main magnetic permeable core.

A permanent magnet.

Two secondary magnetic permeable cores, distant by a constant air gap with respect to said main core.

An electric coil wiring wrapped around said main core.

A magnetic permeable piece distant by a constant air gap with respect to said main and secondary cores.

Said main core is the core of said electric coil.

Said secondary cores are located one on each side of the magnetic poles of said permanent magnet.

Said main core contains the permanent magnet and its secondary permeable magnetic cores one on each side of the magnetic poles, and the electric coil.

Said secondary magnetic permeable cores one on each side of the magnetic poles of the permanent magnet, are distant by a constant air gap with respect to the main core.

Said main core shaped to be the core for the electric coil, where the orientation of the electric coil and the permanent magnet with its secondary cores is established to be parallel in magnetic polarity.

Said main core shaped to have physical extensions of the electric coil magnetic poles, without interconnecting said poles.

A special geometry pattern where the area of the cross section of the core where the electric coil is located in said core, is equal to or greater than the area of the permanent magnet pole side.

Said main core having a special geometry pattern where the area of each extension on the side of the main core exposed to the magnetic permeable piece distant by an air gap is equal to or greater than the area of the permanent magnet pole side.

Said secondary cores having a special geometry pattern where each area exposed to the magnetic permeable piece distant by an air gap is equal to or greater than the area of the permanent magnet pole side.

A special geometry pattern where the length of the air gap between said secondary cores and main core; is equal to or less than the air gap between said cores and said permeable magnetic piece.

Said magnetic permeable piece distant by an air gap with respect to said main core and said secondary cores, is located on the half side of said main core where the extensions of the magnetic poles of the electric coil are located, being opposed to the core side where the electric coil is placed.
An electromagnetic device comprising:

Two primary magnetic permeable cores.

A permanent magnet.

A secondary magnetic permeable core, distant by a constant air gap to said primary cores.

An electric coil wiring wrapped around said secondary core.

A magnetic permeable piece distant by a constant air gap with respect to said primary and secondary cores.

Said secondary core is the core of said electric coil.

Said primary cores are located one on each side of the magnetic poles of said permanent magnet.

In between said primary cores, the electric coil with the secondary permeable magnetic core is contained.

Said electric coil with its secondary permeable magnetic core is distant by a constant air gap with respect to the primary cores.

Said primary cores shaped to contain the permanent magnet, where the orientation of the permanent magnet and the electric coil with its secondary core, is established to be parallel in magnetic polarity.

Said primary cores shaped to be the physical extensions of the permanent magnet magnetic poles, without interconnecting said poles.

A special geometry pattern where the area of the cross section of the secondary core where the electric coil is located; is equal to or greater than the area of the permanent magnet pole side.

Each of said primary cores having a special geometry pattern where the area of the extensions on the side of these primary cores exposed to the magnetic permeable piece distant by an air gap is equal to or greater than the area of the permanent magnet pole side.

Said secondary core having a special geometry pattern where each area expose to the magnetic permeable piece distant by an air gap is equal to or greater than the area of the permanent magnet pole side.

A special geometry pattern where the length of the air gap between said secondary core and primary cores; is equal to or less than the air gap between said cores and said permeable magnetic piece.

Said magnetic permeable piece distant by an air gap with respect to said primary and secondary cores, is located on the half side where the extensions of the magnetic poles of the permanent magnet and electric coil are located, being opposed to the core side where the permanent magnet is placed.
An electromagnetic device according to claim 1, 2, 3, 4, wherein the electric coil has its own core and is inserted in said main core.
An electromagnetic device according to claim 1, 2, 3, 4, wherein the electric coil has its own core and is inserted in said secondary core.
An electromagnetic device according to claim 1, 2, 3, 4, 5, 6 comprising more than one permanent magnet.
An electromagnetic device according to claims 1, 2, 3, 4, 5, 6, 7 comprising more than one electric coil.
An electromagnetic device according to claims 7, 8 comprising more than one magnetic permeable piece distant by an air gap.
Electromagnetic devices according to claim 9 where said cores are stationary and said magnetic permeable piece(s) are mobiles.
Electromagnetic devices according to claim 9 where said cores are mobile and said magnetic permeable piece(s) are stationary.
A rotary motion device using a sequence of electromagnetic devices according to claims 10, 11.
A linear motion device using a sequence of electromagnetic devices according to claims 10, 11.
A rotary motion device using a sequence of electromagnetic devices according to claim 12 oriented with alternated polarity.
A rotary motion device using a sequence of electromagnetic devices according to claim 12 all oriented with the same polarity.
A linear motion device using a sequence of electromagnetic devices according to claim 13 oriented with alternated polarity.
A linear motion device using a sequence of electromagnetic devices according to claim 13 all oriented with the same polarity.
A rotary motion device according to claims 14, 15 where magnetic permeable pieces, magnetically connect opposite poles of the same said cores.
A rotary motion device according to claim 14, 15 where magnetic permeable pieces, magnetically connect opposite poles of different said cores.
A linear motion device according to claim 16, 17 where magnetic permeable pieces, magnetically connect opposite poles of the same said cores.
A linear motion device according to claim 16, 17 where magnetic permeable pieces, magnetically connect opposite poles of different said cores