HIGH QUALITY TPU DVD Video Released from Jack Durban

[sparks]

Speaking of a ROTATING FIELD to drive the TPU.  Every PC Fan Motor has a Brushless Motor.  If you take it apart, it is a 3 PHASE MOTOR.  There is a small circuit board with Transistors that create 3 Phase Power to drive the Motor Coils.  Brilliant design at Low Cost.  However, because it has transistors, it can be EASILY damaged by over voltage spikes!!

I had a PC Fan once that was making a Growling Noise.  It turned out to be 1 PHASE OUT.  The Motor was still barely turning on 2 Phases.  Amazing little things.

My Question is:  COULD a PC 3 Phase Fan Circuit Board be used to drive 3 Control Windings on a TPU?

    I have a 15kw three phase vfd running a blower motor.  It's carrier freq is 4khz.  The fake sinsuoidial 60hz is controlled by amplitude modulation. The carrier freq is putting out a boatload more power than 15kw.  First it makes the 80pound motor jump up and down 4000 times a second,  the noise from this phenomenon creates a high pitched ringing sound.  It blanks out am radio receivers for a 1/4 mile radius.  Gets into my telephone lines etc.  All this extra power and not a single watt draw to produce it from the grid.    I have a spare 5hp 3phase inverter on hand.  I was thinking of dumping just the carrier into a steel/copper kick coil whose magnetic shift is experienced by a  "special" transformer secondary.  Measure the watts in and out and if it has gain feed some of the power back to the caps in the inverter.
Then turn off the switch to the grid and light up some lamps.   I don't think I need to wrap it all up in black electricians tape though.    
    I think the motor/generator you are describing has been done before.  Martinez Molan or something like that.  Stephan has a topic about it on this forum.  When you had single phase out your motor was acting as a rotary phase converter.  I've built plenty of these.



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[FatBird]

@ Sparks

Thank you for explaining that.  It really sounds very interesting.  Maybe you could post a brief schematic showing the connections & what frequency is on which wire.


Thanks.
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[BEP]

My Question is:  COULD a PC 3 Phase Fan Circuit Board be used to drive 3 Control Windings on a TPU?

Yes. Keep in-mind those outputs are limited in current and voltage. You'll have to have some form of middle device (MOSfet or other device) to do the work.
Excellent observation on the polyphase arrangement. The same can be true on computer drives of all types.
Another item to be aware of is the ring magnet that rotates around these 3-phase coils is the same magnetic polarity all the way around except on one spot. This is the point that creates movement by its attraction/repulsion from the motor coils. There may be variations of this.

These motor coils are fired in groups. You should see they are wired in groups of three. I have seen those in groups of other odd numbers.

You should find it easier to throw a few transistors together to replace the motor controller. This would give you a better chance of varying the phase relationship between the poles.

Lookup 'rat-race' circuits done by others on this forum or look into adding a third stage to a simple transistor multivibrator. If you choose to build a multivibrator you can replace the resistor in each stage with a variable resistor so you can control the phase relationship between pulses.

>>Edit...
While most think this firing sequence is only around the circumference I think it may also be vertical from one collector to another. On the 3 collector TPUs you can series the control from one collector with the next collector. This would not only create rotation around the axis but would also create a vertical movement (of what I'm not sure of yet).

[BEP]

Also right behind the crystal, I think I can see a potentiometer. lol
Would a pot be required with a crystal?

If it is a crystal and there is a pot then it is not uncommon to add another device, like a cap, pot, coil or combinations, to give some extra control or shift from the crystal frequency.

Like said many times before, colorburst comes to mind. Easy crystal to obtain, has to do with TVs, frequency seems related to TPU frequencies mentioned. I could see a TPU resonating at 3.58MHz or some division or multiple of that. With a Pot maybe even 35.705kHz ?

[Peterae]

If it is a crystal it would much more likely be a variable capacitance which would also be coloured to indicate the value, most comonly yellow or green in uk tv's.