Simple to make Hilden-Brand style motor

[scianto]

BTW, this is a drawing of the circuit I am using for running PPMM with unidirectional impulses:
http://servilo.website.pl/laboratorio/esploroj/rownolegle_strumienie/SRSM_1_1_impuls.png
I would really like to see you to try it too with your motor and show us oscilloscope tracee. Will you?

[scianto]

And here is a drawing of the circuit I am using for running PPMM as in the above video:
http://servilo.website.pl/laboratorio/esploroj/rownolegle_strumienie/SRSM_1_1_impuls.png

[gyulasun]

And here is a drawing of the circuit I am using for running PPMM as in the above video:
http://servilo.website.pl/laboratorio/esploroj/rownolegle_strumienie/SRSM_1_1_impuls.png

Hi Scianto,

Very interesting test, did you have to rewind your earlier PPMM coils or change something mechanically to run it with unidirectional pulses? (Because earlier the H bridge did polarity changings, right?)

In your earlier video http://www.youtube.com/watch?v=_Ii6_mKO92Y showing the unidirectional pulses (when you used a function generator instead of the optical sensor)  you used power resistor as the load for the generated power, is this correct? There was one power resistor on the shelf (in head-height) for which you showed 22.8V and 1.92A (at RPM=8066) and there was another load resistor on the table what you hand switched in by the banana plug (8.7 Ohm?) this had 18.7V and 2.1A power dissipation: could you explain which power resistor was connected to where?  And at this RPM 8066 the input power was 40V at 3.6A from the power supply if I saw it correctly?

And in you latest video you utilized the generated power of the motor for running it, instead of dissipating it in the power resistors: here you used another PPM motor or you used the same one as before? (It is ok that the opto interruptor was used now instead of the function gen.)
My other question: In you schematic there is a battery shown that is charged from the motor coil and how you utilize the generated power for running the motor: it is not shown. Could you ellaborate on this?

Notice: You may wish to correct your schematic, the input Pin 2 of the MAX4420 is connected to the 12V battery positive line (opto transistor collector) instead of its emitter (or there is a collector resistor missing, that would be another solution if inverted switching is also good).

Very good job/videos!
rgds, Gyula

[i_ron]

BTW, this is a drawing of the circuit I am using for running PPMM with unidirectional impulses:
http://servilo.website.pl/laboratorio/esploroj/rownolegle_strumienie/SRSM_1_1_impuls.png
I would really like to see you to try it too with your motor and show us oscilloscope tracee. Will you?

First, thank you for the links and information.

I have a problem with your request though, lol, the little engine has been taken apart in preparation for the next build.

But my coils had few winds and when I did power it with another motor there was not much output so am not sure as it would have worked as well as yours seems to.

Ron

[scianto]

>> did you have to rewind your earlier PPMM coils or change something mechanically to run it with unidirectional pulses?
*
I made no changes.


>> Because earlier the H bridge did polarity changings, right?
*
Right.


>> you used power resistor as the load for the generated power, is this correct?
*
Yes.


>> There was one power resistor on the shelf (in head-height) for which you showed 22.8V and 1.92A
*
That one was to dissipate the recovered power (coming after the diode from the coil connected to the FET dren.


>> there was another load resistor on the table what you hand switched in by the banana plug
*
That one was connected to the parallel winding of the run PPMM stator coils. All the coils in the motor stator are bifilar. I used one wire to power the motor and the other was connected to the resistor. So the stator was used as a transformer.


>> at this RPM 8066 the input power was 40V at 3.6A from the power supply if I saw it correctly?
*
Yes, but the rpm reading has to be divided by 2, so it was 4033 rpm.


>> And in you latest video you utilized the generated power of the motor for running it, instead of dissipating it in the power resistors.
*
This is a different setup. Here the windings of the stator are all connected to the power source, so it does not work as a transformer, thus no resistor as transformer load as before.


>> here you used another PPM motor or you used the same one as before?
*
A different one, smaller and less powerful, the first version.


>> It is ok that the opto interruptor was used now instead of the function gen.
*
That is to make the pulsing at the right time according to the position of the rotor poles to the stator poles.


>> there is a battery shown that is charged from the motor coil and how you utilize the generated power for running the motor: it is not shown.
*
All is connected exactly as on the circuit drawing, no other connections. There is only one battery bank (3 x 12 V 7 Ah) running the motor (in fact, on the video it was substituted by the power supply on the left).
The generated power, half sinusoidal pulse, was powering the motor ONLY during the generated pulse. In other words, when the motor was working as an alternator, it was using it's produced power to turn the shaft.
This is my interpretation of the oscilloscope traces. I may be wrong, so I am making more tests to find out, what exactly is happening.

>> You may wish to correct your schematic,
*
That was an obvious error on the drawing only. Now it is corrected. Thank you.