Electric Motor Secrets

[mbrownn]

This makes sense

[Robert49]

Hi guys!

Thought I'd share this with you.
This is a speed control for one of my rotary attraction motors.

Fun to experiment!

Robert

[Donald Haas]

Winch Motor Conversion

Hi All,

I got a surplus (new) "deep china" series wound winch motor to use as a test bed for the RA motor.
The round rotor had 23 segments so I made it into a 2 pole rotor with about 5 segments per pole.
Like a bar instead of round. Removed all windings from the rotor except some #8 or 10 wire is imbedded in the laminations of the rotor.
These wires are not connected and cannot function as a "winding".

The total resistance of the 4 series coils was .1ohms. They look like #8 or 6 strips that fit on the bobbins.
The bobbins are cast metal and are bolted to the case. It seems to me that the case is the stator.

The bobbins are so small that I could only get 18ft of #20 wire on each one for my windings. Single strand.

To make the story shorter: it is running with a mosfet for each pair of coils and switched with IR LED's that send 12v to the mosfets when the beam is broken.
Runs very quiet. Not too hot at about 20v and 4amp.
It is easy to take energy out for battery charging. "split the (+)".

A pair of golf cart batts are hooked up now for charging. Havn't tested it much yet. Don't know if my setup will last that is inside the motor.

Interesting to note:
When drawing power to charge a batt it uses a little less amperage, and the rpm increases a little also.

My stator rotor gaps are poor at best and if I continue with this then would need to have laminations lazer cut for stator and rotor, or
have machined pure cast iron for the same purpose.
The objective would be to have very small gaps in the .002" range per pole for the best torque.

Thanks for being here,

Donald

[Donald Haas]

speed control

Hi Robert49,

Thanks for posting the speed control.

Not many people posting.

I would like to get a large suitable motor to convert.

My winch motor is designed originally for very short windings and very high amps.

I was able to price laser cut laminations, to my specs for a 6.5"D rotor,and 11" stator, 2" thick for $1300.
Not a bad price even though steep for an experiement.
The laminates are .025" thick, industry standards regarding type of steel and insulation.
That would be 80 of each.

I've got a mill drill laithe (big smithy) and maybe we could colaborate.

Donald

[Malinany]

Thanks, I will come back later.

[gyula]

Hi Robert,

May I ask on output power measurements vs input in case of the flux transfer generator?

Thanks, Gyula

[Robert49]

Hi Robert,

May I ask on output power measurements vs input in case of the flux transfer generator?

Thanks, Gyula

Hi Gyula.

I just made this last friday from parts of another project.
The present setup is not very efficient but it does behave as I expected and prooves my theory.
My next setup will be more compact and more powerfull but I have four ongoing projects and very little time to work on them so keep looking me up.

Fun to experiment!

Robert

[gyula]

Ok Robert, thanks. It is a good sign the speed barely decreases when you short the coils i.e. you load the coils with their own 'inner' impedance.

Thanks and keep up good work.

Gyula

[Donald Haas]

flux gen

Hi Robert,

It looks to me like you have neo cylinder mags going through the middle of the coil(s) core at a perpendicular angle.

Am I seeing this right?

I see the soft iron rotor pieces are alternately arranged to break the magnetic circuit 12 times per rev. Is this correct?

Havn't seen this kind of setup before.

Please reduce my ignorance as needed.

donald

[Robert49]

Hi Robert,

It looks to me like you have neo cylinder mags going through the middle of the coil(s) core at a perpendicular angle.

Am I seeing this right?

I see the soft iron rotor pieces are alternately arranged to break the magnetic circuit 12 times per rev. Is this correct?

Havn't seen this kind of setup before.

Please reduce my ignorance as needed.

donald

Hi Donald.

Yes the neo magnets are perpendicular to the soft iron cores and all the same polarity but not going through, just sitting on the surface. This way the iron cores only have one polarity.

The magnetic circuit is not broken but transfered from one side of the rotor to the other 16 times per rotation, thus expanding the magnetic field alternately to either side.This setup has very little drag.

I have already designed a better way to do it with a very small air gap ,even less drag and more output.(hopefully)

Fun to experiment!

Robert

[Harvey]

Hi guys!

Thought I'd share this with you.
This is a speed control for one of my rotary attraction motors.

Fun to experiment!

Robert

Hi Robert,

I just wanted to commend you for your application of the parallel slots to achieve pulse width adjustment in this speed control design. It is a very subtle thing which is a bit counter intuitive where the same dimensioned slot can provide such a beautiful analog adjustment relative to the surface speed of the disc even though the angular velocity is identical for all radials.

[Robert49]

Hi Robert,

I just wanted to commend you for your application of the parallel slots to achieve pulse width adjustment in this speed control design. It is a very subtle thing which is a bit counter intuitive where the same dimensioned slot can provide such a beautiful analog adjustment relative to the surface speed of the disc even though the angular velocity is identical for all radials.

Thanks Harvey!

I'm happy to see someone noticed.
The arrangement of the spring may not be right but the main idea got through.
I'm working on my "Flux transfer generator" right now. Still waiting for the modified rotor but I already modified the stator. I should have pictures of the setup in a few days.

Fun to experiment!

Robert

[Robert49]

Hi guys!

Here's the next step on my "Flux transfer generator" .
Four n52 magnets 1" x 1/2" thick all same polarity on the bar shaped rotor .
The stator has 3 coils.
When the rotor is outside the stator, it wants to stick to everything but when inside the stator, it can be turned easily.
Just like the previous one, it behaves as expected and barely decreases when shorted.
The coils are too small (130 turns each) so I need to change the stator size
to produce more voltage.
I used a dishwasher motor ,($9.00 at a surplus store) ,and modified it.


Robert

[mbrownn]

I am interested to see what you do with this

[Peter Lindemann]

Everything is Revealed

Hi Guys,

Thanks for keeping this thread alive. Back in September of 2010, in this thread, I posted the following information:

The DVD (Electric Motor Secrets) was produced 3.5 years ago, and since that time I have been working with a number of people on this concept. We have run hundreds of computer simulations on the method and developed very advanced designs, which I am not free to discuss here, because we have all signed NDAs.

I can tell you that the ideal motor, based on these principles, has a number of characteristics. These are:
1) The coil impedance of the system is quite low, to allow rapid charge and discharge of the coils.
2) The inductance changes very little through the power stroke, to maximize electrical recovery. The way this is accomplished, I cannot discuss.
3) The reluctance of the total magnetic circuit changes very little through the power stroke, as well.
4) Input supply voltage is kept to the lowest value possible by limiting BEMF in the input coils. The methods used to accomplish this, I cannot discuss.
5) Mechanical power production is managed by optimizing the timing, the size of the air-gap, and the total coercive force of the magnetic field across the air-gap, measured in Oersteds.
6) Capacitors are used in the electrical recovery circuitry.

Well, I am happy to announce today, that Dave Squires is the main person I was referring to here, and all of the issues I said I could not discuss are COMPLETELY REVEALED in Dave's lecture titled Advanced Motor Secrets from the Summer Conference.

If you ever wanted to understand all of this, just click HERE.

Best regards,
Peter