G?day all,

Well, as they say:  ?The best laid plans of mice and men?.?

As it is the motor is a dud. I should have known! I have no excuse other than getting carried away with what turned out to be a stupid idea

Let me tell you how I found out.

When I published my first test concept I used discrete magnets instead of the horseshoe magnet as specified in the Freischwinger. Post 19, page 2 in the original thread.

Tak22 expressed doubts about this. He said: ? I'm still not sure this can be done without a horseshoe style magnet. Can't know for sure until tried I guess.? Post 20, page 2.
I decided to test this. In my tests I used several configurations.



Here are the seven configurations I tried.
Fig. 1   shows the horseshoe arrangement as in the original Freischwinger.
Fig. 2   shows the use of two discrete magnets in horizontal alignment.
Fig. 3   shows the use of a bar magnet.
Fig. 4   shows the use of two discrete magnets in vertical alignment.
Fig. 5   shows the use of two discrete magnets in vertical alignment with a steel bar.
            connecting the magnets, thus mimicking a horseshoe magnet.
Fig. 6   shows the use of a magnadur magnet. (Magnadur magnets are ceramic
             magnets with their poles on their flat faces).
Fig. 7   shows the use of two magnadur magnets connected with an iron yoke.

In contrast to the Freischwinger the reed did not move inside an air coil. I simply wound the coil directly on the reed itself as I was not interested in the detrimental effects in relation to sound fidelity. All I wanted to test was movement.

This is where it showed up that the motor as designed does not work. In all instances the application of a forward or reverse current sent the reed in the appropriate direction up to the strongest point of attraction, the dreaded ?stick point?. At this point, I erroneously thought, that the application of a reverse current will propel it further. This worked well, but only in one direction, in the direction away from the midpoint!



This means of course that the horseshoe arrangement in the motor is out. As the reed approaches the magnet there is a counter force which cannot be eliminated with a pulse. Perhaps this could be overcome with inertia from a flywheel, but that is not the idea here. On the other side of the magnet it is an asset, since a pulse applied there aids rotation.

Does that mean the motor is doomed?
Not at all. It just needs a bit of revamping. My tests indicate that this can be done. I will write up my test results and the changes to the design shortly. I just wanted to show now why it does not work as designed before someone tries to build it.

Hans von Lieven

Quote from: jeanna on March 02, 2008, 01:06:22 AM
Hi all,
I just have a small bit to report now.
I made a 6 layer bi-metal, bifilar 'coil body 4' and tested it in the same way as yesterday. At first it was confusing. My results seemed to be lower, then I realized that my GSR is lower today.
So, I tested each configuration with each 'coil body 4' and found that they are exactly the same. 2 layers is the same as 6 layers!

Thats all for now!

jeanna

@jeanna

Thats not consistent with results thus far if you have some pics maybe we could evaluate and help you see whats going on with it as well whats the gauge wire you using?
                                                                                         Joe

Quote from: Localjoe on March 02, 2008, 06:13:31 PM
results thus far if you have some pics maybe we could evaluate and help you see whats going on with it as well whats the gauge wire you using?
                                                                                         Joe

Joe,
Did anyone else make one of these and specifically try to avoid galvanic reax and JUST look at the 2 metals wound together without the secondary?
I didn't think so, my apologies for adding nothing new.
I described this thing in detail last page. It is 24 gauge wire for both etc. check out last page's (maybe feb 29- just after your description to marco and before Hans' description of his motor) post for details, please.

jeanna

@ hans

Good to read your results. I'm in the process of building the Freischwinger device not for a motor but for an entirely different project. Your posts saved me a lot of time. As long as I know I can get the back and forth motion from the reed, I'm home free and will continue to build the device.

Hi All,
I did the last (!) of my experiments on the straw made into a 'coil body4' today. The findings are easy, but hard to explain clearly.

I made a little circuit 3 times.
These are the components in all 3 of the circuits:

2 AAA batteries 2.45VDC.
11.6 ohm resistor,
a little motor that wants 3.5V at 20mA but works with less.

1-The first circuit is only those parts listed above. I took readings everywhere, even in the piece of wire between the motor and the battery.

2- The second circuit is made as above with the addition of the straw wound with bimetal bifilar in 6 layers. where the Cu leads 5 and 10 are attached to the rest of the circuit.

3- The third circuit is made as above with the addition of the straw wound with bimetal bifilar in 6 layers. where the Fe leads 6 and 10 are attached to the rest of the circuit.

All the readings were pretty normal. The Fe wire has more resistance than the Cu wire so the voltages were down a little.

Here are the parts that seem unusual.

If I now connect the motor circuit to one Cu and one Fe (terminals 5,6) the motor stops, (no surprise, there is no circuit there) and with the dmm probes on the remaining Fe and Cu wires, the voltage reading  is 2.43VDC (If there is no circuit,,, where did that voltage come from?) and I can unhook the Cu and the voltage of the Fe will be 2.43V but I cannot unhook the Fe wire. The Cu wire will not show a voltage.

Also, within the circuit that makes the motor run, the
FE wire of the Bimetal coil has a resistance of 7.2 ohms and a voltage of 0.130V and the
Cu wire has a resistance of 1.4 ohms and a voltage of 0.020V.

So with a little E=IR action, this means there are
18mA in the Fe part of the coil and
14mA in the Cu part.
This is in addition to what is in the plain circuit because nothing else has changed.

The last thing I wish to include in this is that at the end of all this with the battery running through the coil for a couple of hours on and off, there is NO magnetism that makes the coil do anything to a compass.

EDIT: Today Mar3. I've managed to magnetize this like all the rest. I am just using it in series with a supercap circuit to run the motor. Maybe I will try to demagnetize it somehow later.    j

I made a drawing, but it is not as complete as these words. Sorry 
here it is anyway:

jeanna