Circuit setups for pulse motors

[Artic_Knight]

one quick question, the Transistor type curcuit that blocks the flow after the coil, does it need to remain there or can it be moved/paired  with one/an additional curcuit near point A on the positive side to block the powersource?  this website said its more like a guideline and not text book so im under the impression there shouldnt be a difference?

[hoptoad]

one quick question, the Transistor type curcuit that blocks the flow after the coil, does it need to remain there or can it be moved/paired  with one/an additional curcuit near point A on the positive side to block the powersource?  this website said its more like a guideline and not text book so im under the impression there shouldnt be a difference?

@Artic
With the circuit polarity as it is shown, moving the coil (and diode and point B and point A reference) to the emitter side of the transistor will still result in Fly-Back availability from the coil at point B (which would now be on the -ve rail of the supply) with reference to point A which would now be connected, along with the top of the coil, to the emitter.

But the DC Step-Up Function provided by a Fly-Forward load path from point B to C will no longer be available or even exist, because point B will be at the same potential as point C.

Generally you do not use the emitter side of the transistor to place your main power load, because it is a common current path shared with the transistor's base to emitter current. (the controlling signal path).

You can put the coil on the emitter side if you wish and still get some pleasing results, but generally speaking, you would normally drive a power coil load between the Supply and the Transistor Collector, as shown above. But as previously stated, it is a guideline, not a gospel.

You can create as many pulsed transistor/coil configurations as your imagination, electronics understanding, desire to learn and preparedness to do experimentation will allow.

P.S. The symbols in the circuit diagram are for Mosfets, but the general switching principle of the circuit is the same for transistors.

Cheers from Hoptoad

[Artic_Knight]

that brings up another question that has been bugging me. i dont understand the difference in B and C. there is a diod needed yes but if the energy is leaving the coil that has not been used it is collected by B and if the mag field colapses and creates another current again B can grab that can it not? i understand one of them is on the other side of the switch but the switch is not changing the current just completing the path, so the same current before the switch should be after the switch as well right? seems if you connect 2 diods they would just share the load perhaps not a bad thing considering its a redundant curcuit and redundancy is good. or maybe im missing some principle here?


EDIT: well with looking at this specific curcuit there are other items on the board that are dumping potentially unused energy so C would collect the energy from the rest of the board while B collects from the coil exclusively. and if you wanted this coil to continue to run after the switch has been turned off you would need B to keep it going.

[Artic_Knight]

ive noticed a lot of pulse motors on youtube and all are fairly recent.  does anyone here have a good working pulse motor?  the videos i see either light a light with the back emf or possibly run part of the motor even charge a capacitor. no one outright shows the measure of the current they are producing verses the input atleast not to a satisfactory condition that i have seen so far.  does anyone have a good video of someone measuring the output verses the input and preferably even checking the torque to some degree? 

the you tube videos i like currently still do not show any measurements of this to a satisfactory level. but he created a pulse motor then made a home made alternator and attatched that. all of it appears to be combined as overunity but there was no real measurements to honestly back it.

i suppose i wont know till after i have mine working..

[hoptoad]

that brings up another question that has been bugging me. i dont understand the difference in B and C. there is a diod needed yes but if the energy is leaving the coil that has not been used it is collected by B and if the mag field colapses and creates another current again B can grab that can it not? i understand one of them is on the other side of the switch but the switch is not changing the current just completing the path, so the same current before the switch should be after the switch as well right? seems if you connect 2 diods they would just share the load perhaps not a bad thing considering its a redundant curcuit and redundancy is good. or maybe im missing some principle here?

EDIT: well with looking at this specific curcuit there are other items on the board that are dumping potentially unused energy so C would collect the energy from the rest of the board while B collects from the coil exclusively. and if you wanted this coil to continue to run after the switch has been turned off you would need B to keep it going.

@Artic
Point C is the common return or "sink" path for all the applied potential in the circuit, and regenerative potential, if a Fly Forward load path is used from Point B to C .

Point B is the "source" path for stored energy released by the collapsing magnetic field through the decoupling diode . It can be connected in a Fly Back (feedback) loop path, in Reference to Point A, or it can be connected as a Fly Forward DC Step Up switch bypass in Reference to Point C.

You cannot effectively use fly-forward and fly-back loading at the same time It's one or the other, but not both.
Fly Back is the most beneficial and commonly used method for gaining increased pulsed motor efficiency.

The biggest difference between Point B and C is that point C is a constant negative voltage reference point, while point B has a variable voltage potential with respect to point C and Point A, depending on whether the switching transistor / Mosfet MQ3 is turned on or off.

Point A has a constant positive voltage reference to point C but has a variable voltage reference to point B.

You can connect directly from Point B to A without a load, but you cannot connect directly from point B to C without a load, because the coil will remain on at the same current level at all times, regardless of the state of the transistor switch.

Cheers