the steorn orbo motor replication

The Steorn Orbo motor replication by JL Naudincreated on december 26, 2009 - JLN Labs - Last update february 14, 2010

Toutes les informations et schémas sont publiés gratuitement ( freeware ) et sont destinés à un usage personnel et non commercial

All informations and diagrams are published freely (freeware) and are intended for a private use and a non commercial use.

Cliquez ici pour la version FRANCAISE

PROJECT LOG BOOK

Three KEY EXPERIMENTS to understand the Orbo motor principle

Loading test with a pickup coil connected to a High Power Leds panelwith the Orbo motor v4

Read this patent: Substantial nullification of external magnetic fields andLorentz Forces Regarding toroïdal inductors

Measurements of the Orbo v4 trigger pulse, full datas analysis and EMenergy in the coils

Experiment on Viscous Remanent Magnetization (VRM) with the

ferromagnetic core

New measurements after a fine tuning and a full alignment of the coils on the

neutral line

The Steorn Orbo motor replication by JL Naudin http://jnaudin.free.fr/steorn/indexen.htm

1 of 32 2/14/2010 3:31 PM

Successful generation of the Orbo type pulses with Steorn motor V4

Motor V3: Canceling the Back EMF in the stator coils, How To...

Motor V3: COILS INDUCTANCE Vs ANGULAR POSITION of the rotor

magnet

Test of shorting the two toroïdal stator coils at full RPM

Measurement of the toroïdal coil inductance Vs the angle of the rotormagnet

Measuring the current lag in the toroidal coils and fine tuning

The New Steorn motor V2 design and test

Understanding the Steorn effect, a very simple experiment

Dec 26, 2009 : My first Steorn motor V1 successful replication

The new Steorn magnetic motor shown on december 15, 2009 by Sean McCarthy

in Dublin is composed by a rotor equiped with neodymium magnets and a statorwhich contains toroidal coils with a ferrite core.

The rotor magnets are attracted by the ferromagnetic material of the torus, so

the magnetic potential energy is converted into kinetic energy of rotation. The

ferrite will be magnetically polarized and will be temporarily transformed into amagnet of opposite polarity to that of the rotor magnet. So there is attraction but

when the magnet is closest to the ferrite it is locked by the magnetic force and

enable to exit. When the magnetic potential energy is minimal and when thekinetic energy is maximum (the nearest point of the magnet closest to the torus),

a depolarization pulse is sent through the toroidal coils changing the orientation

of magnetic domains (Weiss domains) of the ferrite, which frees the magnets.

I recall that there is no magnetic field outside a toroidal coil, it is commonlycompared to a coil of infinite length. There is no direct interaction of the

magnetic field of the torus with the magnetic field of the rotor magnets. The

magnetic field of the toroidal coil is used only to depolarize temporarily themagnetization of the ferrite core. Thus, the magnetic force of attraction of the

rotor becomes unbalanced (symmetry is broken), the magnetic potential energyduring approach of the rotor magnet is less than the potential magnetic energy

during the exit phase. This is therefore the purpose of "magnetic regauging" fully

explained by Tom Bearden.

To summarize, we have a "non-reciprocal" and fully asymmetrical system. There is

no counter electromotive force (back-emf) in the toroidal coils of the statorproduced by the rotation of the rotor. The current required to get the temporary

depolarization of the magnetic domains of the ferrite is fully independent of the

mechanical torque produced on the motor shaft.


2 of 32 2/14/2010 3:31 PM

From the informations published on the Internet by Steorn, I have decided to reproduce this magneticmotor and, firstly, to check the observations and measurements presented in the video of December 15,

2009 by Sean McCarthy in Dublin.

The experiments proposed here and their explanations are only based on my personnal interpretation only

of the Orbo working principle presented to the public through videos and photos by Sean McCarthy inDublin and may be differ from the official Steorn explanations. These experiments presented here are the

tests results of all my researches about the Orbo device from Steorn.

The previous Hall effect probe used to trigger the coils has been replaced by an optical sensor with black

shutters for a better tuning.


3 of 32 2/14/2010 3:31 PM


4 of 32 2/14/2010 3:31 PM

Technical specifications of one toroïdal coil:Ferromagnetic core (grade 3E25) specific inductance Al=3820 (23x14x7 mm)

wound CW with 7.5 m of 4/10 mm copper wire

Max inductance = 235 mH (far from the magnet)Min inductance = 58.6 mH (close to the magnet)

Coil resistance = 1.4 ohms

Magnets specifications:

4 x 2 NdFeB magnets (Bremag 27) of 27 MGoe (208 kJ/m3) polarisation N-S outward.Magnet size: diameter 22 mm, 10 mm thick

Rotor specifications:

Plastic cylinder: outer diameter = 100 mm, height = 50 mm

3 mm gap beetwen the rotor and the stator coils


5 of 32 2/14/2010 3:31 PM

Power supply: 10 V DC with 220 mA at 750 RPM


6 of 32 2/14/2010 3:31 PM

The latest model V3 is currently under test. This new design is more closer to the original demo rig version

presented on dec 15, 2009 in Dublin by Steorn....

TEST 1: Shorting two toroïdal stator coils

In this test only the two toroïdal stator coils 1 and 3 are used to power the motor. The RPM is measuredwith an optical tachometer and the motor is only lighted with a DC battery powered halogen lamp while all

the AC lights are switched off in the lab. At full and stable speed ( 690 RPM ), the stator coils 2 and 4

connected in series are shorted and the change of RPM is measured.


7 of 32 2/14/2010 3:31 PM

TEST RESULTS: At a full and stable RPM, when the toroïdal stator coils 2 and 4 are shorted with the

switch, there is NO CHANGE in the RPM of the motor. Shorting the toroïdal stator coils has no mesurable

effect on the RPM of the Steorn motor.


8 of 32 2/14/2010 3:31 PM

Below the video of the test


9 of 32 2/14/2010 3:31 PM

TEST 2: Stator coils INDUCTANCE Vs ANGULAR POSITION of the rotor magnet

The purpose of this experiment is to measure the variation of the inductance of the toroïdal coils of the

Steorn motor V3 Vs the angular position of the rotor magnet. The inductance is measured with aninductancemeter Voltcraft LCR 9063 each 5° from 0° to 180°. The four toroïdal coils are connected in

series.

Technical specifications of one toroïdal coil:

Ferromagnetic core (grade 3E25) specific inductance Al=3820 (23x14x7 mm)wound CW with 7.5 m of 4/10 mm copper wire

Magnets specifications:

4 x 2 NdFeB magnets (Bremag 27) of 27 MGoe (208 kJ/m3) polarisation N-S outward.

Magnet size: diameter 22 mm, 10 mm thick


10 of 32 2/14/2010 3:31 PM


11 of 32 2/14/2010 3:31 PM

The total resistance of the four toroïdal coils connected in series is 4.5 ohms

Below the full video of the experiment :


12 of 32 2/14/2010 3:31 PM


13 of 32 2/14/2010 3:31 PM

Click here to see the full datasheet of the core material used in this test


14 of 32 2/14/2010 3:31 PM

On the diagram above the position of the toroidal stator coils and the magnets and the areas where the

coils are powered are clearly showed.

TEST RESULTS: You will notice in the diagram above that, in this replication of the Steorn motor V3, the

inductance of the toroïdal stator coils drops drammaticaly from 963 mH to 190 mH while the magnets

approach to the coils. This inductance changing effect has been fully demonstrated by Sean McCarthy onhis Orbo motor during his show "Cop>1" in Dublin on January 12, 2010...

TEST 3: Canceling the Back EMF in the toroïdal stator coils, How To ?

The purpose of this experiment is to demonstrate that Back EMF can be induced in the toroïdal stator coils


15 of 32 2/14/2010 3:31 PM

when the coils are above and below the neutral magnetic line of the rotating magnets. You will notice thatthere is a very precise position where Back EMF is fully canceled.

To conduct this experiment, I have used my working replication of the Steorn motor V3 with its fourtoroïdal stator coils. I have added a fifth toroïdal coil as a Back EMF probe. This coil is able to move along

a path parallel to the axis of the rotating magnets and above or below the neutral magnetic line. The rotorcontains 4 pairs of NdFeB magnets with their North and South poles outwards (the magnet with the North

pole outward on the top and the magnet with the South pole outward on the bottom).


16 of 32 2/14/2010 3:31 PM

TEST RESULTS: This simple experiment confirms that, when the toroïdal coils are placed above or below

the neutral magnetic line of the rotor, Back EMF can be measured. This experiment confirms also that

there is a very precise position where the Back EMF can be fully canceled, this can be done when thetoroïdal stator coils are placed exactly in line with the neutral magnetic line of the rotating magnets.

Below, you will find the full video of this experiment :


17 of 32 2/14/2010 3:31 PM

TEST 4: Successful generation of the Orbo pulses in the Steorn V4

Now, my new toroïdal coils design of the Steorn motor v4 produces the same shape of the voltage and the

current curves

than the original Orbo motor version from Steorn showed by Sean McCarthy...You may notice that the current rises very fast (for the same inductance value) and the top of the curve is

FLAT and HORIZONTAL....


18 of 32 2/14/2010 3:31 PM


19 of 32 2/14/2010 3:31 PM

It is very interesting to observe that the current is constant during 72% of the pulse while the inductance

of the stator coils increases from 246mH to 916mH...

Parametric Equation of this system


20 of 32 2/14/2010 3:31 PM

TEST 5: New measurements after a fine tuning and a mechanical alignement of the

toroïdal coils


21 of 32 2/14/2010 3:31 PM

The pulse has been precisely tuned with the high power variable resistor and the coils have been finelyaligned on the neutral magnetic line.

The results are now indeniable, look at the current and the power curves below, the current rises very fast

and then the current curve is very flat and horizontal while the inductance of the toroïdal stator coilsincreases. So, no CEMF is produced by the motion of the rotor, there is no spike in the power calculated in

real time by the high end digital oscilloscope....


22 of 32 2/14/2010 3:31 PM

Below, you will find a video of the test of the Steorn motor V4.1:


23 of 32 2/14/2010 3:31 PM


24 of 32 2/14/2010 3:31 PM

TEST 6: Experiment on Viscous Remanent Magnetization (VRM)

The purpose of this test is to measure the Viscous Remanent Magnetization (VRM) decay of the toroïdalferromagnetic core used in my Steorn Orbo motor.

When one rotor magnet, freely attracted by the ferromagnetic material of the toroïd, lives the core, the

ferromagnetic material of the core remains temporarily magnetized with the opposite polarity of the

leaving magne, due to the VRM effect. When the next rotor magnet approaches to this magnetized core, itwill be more attracted by this temporarily magnetization during its approach and thus it will get more

kinetic energy.

(click on the picture below to know more)

TEST 7: Loading test with a pickup coil connected to a High Power

Leds panel

The purpose of this test is to check the loading effect on the input current of the toroïdal stator coils of

the Orbo motor v4. So, a pickup coil has been connected at 45° from the TDC. This pickup coil is a flat aircore coil (600 mH) connected to a High Power Leds panel used as load.


25 of 32 2/14/2010 3:31 PM

The input current through the toroïdal stator coils is measured with an analog ammeter.


26 of 32 2/14/2010 3:31 PM

TEST RESULTS: At full and stable RPM, if the High Power Leds panel is switched ON, there is no change

in the measured current at the input of the toroïdal stator coils.


27 of 32 2/14/2010 3:31 PM

At full speed, with the LEDs OFF, the measured current through the toroïdal stator coils is 400 mA.


28 of 32 2/14/2010 3:31 PM

If the High Power Leds panel is switched ON, the measured current through the toroïdal stator coils is still400 mA.

Below, you will find a video of the loading test with the High Power Leds panel:


29 of 32 2/14/2010 3:31 PM

Stay tuned, more to come soon...

Interesting documents :

THE INFLUENCE OF THE MAGNETIC VISCOSITY ON PULSED FIELD MEASUREMENTS - R.

Grössinger*, R. Sato Turtelli, C. Téllez-Blanco

Inst. f. Festkörperphysik, TUWien, Wiedner Hauptstrasse 8-10, A-1040 Vienna, Austria

SUR LA VISCOSITE MAGNETIQUE ANORMALE par Mlle Alexandra Mitkevitch - Institut industriel, Leningrad

MAGNETIC VISCOSITY by E. Rutherford, M.A. B.Sc. 1851 Exhibition Science Scholar

Coercivity, Time Dependence and Reversible Magnetization in Nd Rich Nd–Fe–B Alloys by Robert C.

Woodward, Nicole T. Gorham, Robert Street, David C. Crew, Erol Girt, and Kannan M. Krishnan

Understanding the Steorn effect by steornlab

The Noether's Symmetry Theorem

REGAUGING and Multivalued Magnetic Scalar Potential:Master Overunity Mechanisms by TomBearden

Introducing the Practice of Asymmetrical Regauging to Increase the Coefficient of Performance of

Electromechanical Systems by M. Walters, M.R. Zolgahdri, A. Ahmidouch*, A. Homaifar Center for Power

Electronics Systems Department of Electrical and Computer Engineering *Department of Physics North Carolina A & T State University Greensboro,

Broken Symmetry by Tom Bearden

Technical datasheets :

BUZ 11 N-MOSFET power transistorSiemens TLE 4905L hall probe sensor

NANOPERM® : New softmagnetic material for Power Electronic DesignsNANOPERM® : Hysteresis curves, µ = f(T)


30 of 32 2/14/2010 3:31 PM

Patents :

US 2009/0009157 A1 : SYSTEM AND METHOD FOR MEASURING ENERGY IN MAGNETIC

INTERACTIONS : An apparatus and method is provided for measuring magnetic force response time due to the

magnetic viscosity of materials and for measuring total energy exchanged due to relative motion of magnetic

materials. Voltage and current versus time through an electromagnet is measured and recorded....

Inventors: Sean David McCarthy, Alan Simpson, Martin Flood, Maxime Sorin

Comments from Jean-Louis Naudin: Why this patent,

below, is interesting for the Orbo motor ?

The patent below is very interesting because it says that in a common

toroidal coil, each layer is equal to a "one turn coil" whose axis isparallel to the axis of the toroid. So, one layer of toroidal coil is equal

to a flat coil of one turn and thus it can tap or produce EMF outside the

torus. So, to counter this interference effect, the only thing to do is ,for each layer of the toroidal coil, to wound a one turn flat coil along

the circumference of the toroid so as to produce a magnetic field which

nullify the virtual one turn coil created by each layer of the toroidalcoil... This is very simple and a very important thing to do for canceling

the weak CEMF induced in the toroid by the motion of the magnet andthis is one of the most important key of the Orbo motor...

Patent number: US5565835 (click on the picture to read the patent )

SUBSTANTIAL NULLIFICATION OF EXTERNAL MAGNETIC FIELDS

AND LORENTZ FORCES REGARDING TOROIDAL INDUCTORS

Inventor: Lawrence R. Groehl

Assignee: The United States of America as represented by the Secretary of the

Army, Washington, D.C.

Appl. No.: 260,151

Filed: Jun. 13,1994

Main and supplemental windings are combined in a toroidal inductor to subntially

nullify Lorentz Forces on the main winding and the magnetic field thereof which

passes externally from the inductor.

BACKGROUND OF THE INVENTION


31 of 32 2/14/2010 3:31 PM

Use of inductors or coils is well know as for storing electrical energy. As the

electromagnetic parameters of inductors increase however, severe problems are

encountered therewith, for example in power distribution systems of electric

utilities. Because of Lorentz Forces which result from the interaction of currents

with magnetic fields, structural integrity becomes a primary consideration.

Magnetic fields which radiate externally from many inductors are also an

important consideration because energy losses result therefrom, and a hazard to

life and equipment.

Below, the Steorn motor shown to the public on december 15, 2009 in Dublin

I am not affiliated with Steorn Ltd. Orbo is trademarked by Steorn

Email : [email protected]

return to the Magnetic motors home page

visites depuis le 26 décembre 2009


32 of 32 2/14/2010 3:31 PM

the steorn orbo motor replication

Documents