Holcomb Energy Systems:Breakthrough technology to the world

[SolarLab]

Hi Bi,

Yes I'm familiar with core saturation causes and characteristics.  I think where we are missing each other here is when you have two equal bucking coils on a common core, you have two flux fields in opposition to each other so in a perfect arrangement and coupling, there would never be any core saturation under any applied H field.  However in a practical application, we purposely design in a k factor that produces a level of resulting inductance that we require for our conditions and it is this so called "leakage inductance" that we can now supply a larger than normal H field to before normal core saturation is reached.

In any case, bucking fields must be produced between rotor poles in Holcomb's devices in order for unipolar N or S poles to be generated and rotated but we are still left without a gain function!!

Regards,
Pm

Hi Partsman,

Saturation and Hysteresis are somewhat interlinked (sorry but the animated gif linking these won't post). Anyway:

Remant Flux Density (B_r) [Coercivity of material]

From the full Four Quadrant Hysteresis Curve of a ferromagnetic material it can be seen that when the Applied Field (H in amp-turns)
is removed (H = 0) there is still some induction remaining in the material; even though H=0 there is a remant flux density, or B_r as
shown in the full Hysteresis Curve.

This may restrict the full use of the B-H in a pulsed system and may also result in hysteresis losses for AC drive signals. B_r is shown in
the attached Hysteresis Curve from the Arnold Magnetic Technologies - Designing with Thin Guage presentation:

https://www.arnoldmagnetics.com/wp-content/uploads/2017/10/Designing-with-Thin-Guage-presentation-1.pdf

This presentation is worth the read IMHO.

Page/Figure 29 - 1: Hysteresis Curve
> Hysteresis Curve B-sub-r [H: Proj_Steel\Arnold_Magnetics]

One possible fix would be to somehow use the Coil Flyback when the pulse is removed (BEMF quickly falls to a large negative value) to
briefly excite the coil (or a second coil on the pole) thus driving the Pole back, or near to, its initial 0 value (removing or adjusting the
Coercivity). Actual circuit techniques are TBD. Flyback pulse depiction is attached.

This problem - solution requires more analysis and design work.

Kind of a disjointed post but hopefully has some useful information.

SL

This book "Dynamo-electric Machinery: A Manual for Students of Electrotechniques by Sylvanus Phillips Thompson S.Sc., B.A.
London Technical Colledge 1888" goes through the development process of "B-H discovery."

https://books.google.com/books/about/Dynamo_electric_Machinery.html?id=i34AAAAAMAAJ

Chapter XIV. Field-Magnets and Magnatism ... Page 288

https://books.google.com/books?id=i34AAAAAMAAJ&pg=PA288&source=gbs_toc_r&cad=3#v=onepage&q&f=false

[ariovaldo]

From some old notes:

LinGen Physical Structure with B and H Fields
LinGen Simplified Block Diagram

> Simplified_LinGen_BLOCK_DIAGRAM - for reference (attached) {472KB}
------------
LinGen Rotor and Stator Side View

> LinGen_Brassboard_SideView_RotorTop_StatorBottom (attached) {155KB}

LinGen Rotor (top) and Stator (bottom). Gray is Magnetic Metal,
Copper is Wire Coils and Lap Winding.
Eight poles per module are shown. Four North and four South.
Either group can be North or South or both per design requirements.
Rotor has individual driven Wire Coils for each Pole. Phased as required.
Stator is Lap Wound - N1 to S1, N2 to S2, N3 to S3 and N4 to S4.
---------
This gif viewer is good for stopping or slowing the animation:
https://sourceforge.net/projects/gifviewer/

=========== new post ========= due forum limits =======

Sliding Magnetic Field Intensity (Amp/m) depicting intensities seen by the Lap Winding.
The field is created by the Rotor Poles via their individual Wire Coils (N x 4 and S x 4).

> Magnetic Field Intensity - 2_Animation_0-17 (attached) {3319KB}
---------
=========== new post ========= due forum limits =======

Magnetic Field Roll (only 4 Poles out of the 8 Poles are shown)B-Field eminating from the Rotor Poles and Coil Windings (only 4 shown).

> Bf-Zp-CS-b_HES_LinGen_4Coil-ST37_03LO_01 (attached) {510 KB}

B-Field Saturated - shows the rolling magnetic field more clearly (only 4 poles shown).

> Bf-ZXmid-Cont_HES_LinGen_4Coil-ST37_4msON-Time_1ms_SeqLO_01 (attached) {1276 KB}

----------
This gif viewer is good for stopping or slowing the animation:
https://sourceforge.net/projects/gifviewer/

Looks like you have to open the "Simplified_LinGen_BLOCK_DIAGRAM.gif" seperately

Good evening Sir!
The LinGen diagram block. From where did you get it?
I'm working on two fronts ( waiting parts), and one is the LinGen, but instead of 4 poles, I'm working with two groups of 3 phases.
I'm posting some pictures,
About the controller, what is the idea? Just pulses (PWM)  or AC?
Thanks and sorry for the questions

[SolarLab]

Good evening Sir!
The LinGen diagram block. From where did you get it?
I'm working on two fronts ( waiting parts), and one is the LinGen, but instead of 4 poles, I'm working with two groups of 3 phases.
I'm posting some pictures,

It's part of my LinGen initial design used for a CAE analysis.

The ~18 page thread starts here: https://www.overunityresearch.com/index.php?topic=4261.msg98138#msg98138

[ariovaldo]

It's part of my LinGen initial design used for a CAE analysis.

About the controller, what is the idea? Just pulses (PWM)  or AC?
Thanks and sorry about the questions

[SolarLab]

About the controller, what is the idea? Just pulses (PWM)  or AC?
Thanks and sorry about the questions

Advanced controller (uses STM32Fxxx Discovery Board microprocessor)
https://www.overunityresearch.com/index.php?topic=4261.msg100999#msg100999

The Controller is programmable (somewhat easy to do - see link) therefore it's very
flexible [by design] so you can make whatever waveform/sequence you want to try.

MOSFET and Driver board (complete - driver and MOSFET)
https://www.overunityresearch.com/index.php?topic=4261.msg102452#msg102452

Laser Cutter method of Rotor-Stator fabrication (new method - reusable)
https://www.overunityresearch.com/index.php?topic=4261.msg102697#msg102697
The metal is expensive and you have to machine it or having this done in SMC (poweder
metal fab) is expensive and a one-off. Laser cutter and sheets is whatever you decide
is required can be cut and laminated - reusable.

NOTE: Your approach is commended but review the Forum Thread above for some pointers, etc.

If you programmed your controller (looks like a UNO or similar) there should be no problem
(and if you need more performance moving to an STM32xxx will be almost easy). Your MOSFETs
and Drivers look good. Try it - if theres a question consider cutting your laminated transformer
in half (rotor coils on one half and Lap coil on the other half).

Great work so far!

Sorry for the short answers but my MX Ergo mouse battery needs charging - later...

SL