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MileHigh, Those clips are both very cool, and that pulse timing viewing can be done and would be neat on a pulse motor, just like timing an "old"  car with a timing light  , I've done that thousands of times. The thing is that the timing is not only important to speed, an advanced timing is good for higher speeds and more efficiency but for Torque we want the timing to be a bit less advanced so that enough current can flow in the coils to produce the torque. That would take some mean programming. To run more efficiently for a given speed and load the micro would need to advance timing to get best efficiency, then if more load is added it would need to retard it back a bit from where it was so the motor didn't slow but allowed more current to flow and retain the same speed if possible, but if it cannot maintain speed then the timing would be even more "too far advanced" for the load/speed. For a constant load it would be easy, but for dynamic loading not so simple. Most methods make a compromise between speed in rpm possible and torque. In the last video, I showed that the acceleration is poor when the timing is set so as to give a higher speed when there is a varying load, with the fan the load gets more as the fan goes faster. With a pulse motor we cannot afford to lose momentum even for a moment, the momentum should be increased before the load is added so that the motor does not need to catch up under load, it only needs to hold it's own. So load switching can help that.

With my current coil arrangement, timing is not so critical in a given range over about 500 RPM and changing the pulse width will change the timing of the currents in the "charging" coil  by retarding it more which with my present coil arrangement will simply make the charging coil pull the next magnet more than push the one it should push, so I think it goes from push push on two magnets, to push pull on the same magnet, possibly if the main coil has a stronger pull then the main coil might go from pushing the north magnet to pulling the next south. Automatic timing advancement by design. To a degree, I think !!

I agree the generator load would be simpler. I'll rewind the little generator tonight and try it again, hopefully I can get it to produce 14 volts RMS or so with thick enough wire to allow the powering of a load. I might try a direct drive if I can manage it, if not I'll use a belt.

Using a generator coil with too much impedance is pointless, there is a voltage produced but it goes flat when a load is applied. and the rotor speeds up because the generator no longer needs to charge the capacitance associated to the coil to such a high voltage, so the load on the rotor is less, that is how Thane does it. Next paragraph explains it.

To produce acceleration under load or short circuit in a generator, the generator coil is wound so that it has significant self capacitance and impedance, when running with no load the generator coils self capacitance is charged and discharged with every cycle to the voltage observed and that is a "parasitic" load, so when the coil is shorted the impedance prevents a "real short circuit" but also stops the charging of the coils self capacitance and the coil itself because the wave form is flattened, that relieves the load on the "prime mover" and acceleration happens. It can be done even with a coil that has little resistance by adding a capacitor across the coil, when running with no "actual" load the capacitor is a significant "parasitic" load in itself, when it's added the generator rotor slows down because of it, if the capacitor produces resonance it slows the rotor even more, then when at resonance if the coil is shorted the generator rotor speeds up. Thane just winds the coils so they do the same thing. I don't understand how he thought it was free energy. Eventually when I find or wind the right coil I will show the acceleration under load using just the coil (no added capacitance), however using a capacitor I can produce acceleration under short circuit anytime. Just ask me and I'll show it again with this new setup, like I did with the other setup. It's a known effect and is in line with the laws of physical nature. And is predictable by using known physical laws.

In a Generator coil that works at reasonably high frequency I think we want to reduce the self capacitance of the generator coils to improve the unloaded efficiency of the generator, ie. make it easier to turn with no load. Thane makes his coils so they load up the "prime mover" right from the start up, shorting them reduces the load they present to the prime mover, and all his video's show that.

Anyone want another demonstration ? With wave forms ? Just say and I'll set it up.

Cheers
 

You may find these of interest. Note that the Orbette is using Core Effect propulsion, not electromagnetic attraction or repulsion.

http://www.youtube.com/watch?v=W8S02SB-ENA
http://www.youtube.com/watch?v=mi_FJwpPrQk

You may find these of interest. Note that the Orbette is using Core Effect propulsion, not electromagnetic attraction or repulsion.

http://www.youtube.com/watch?v=W8S02SB-ENA
http://www.youtube.com/watch?v=mi_FJwpPrQk

Excellent videos TK. I hope John Bedini looks at them to see that there is no free mechanical from the rotor as he puts it.

I had a free afternoon so I decided to start working on an Arduino pulse motor controller, even though I don't have any spare Hall sensors or pulse motors, for that matter.

I do have an IR photodetector/illuminator pair that takes 5 v in and puts out a pulse, just like the Allegro A3144 Hall sensor, though, so the sketch I'm writing will work with the Hall sensor just like it does with the IR sensor.

The sketch isn't complete, I just have the sensor read portion done. It detects the edges of the sensor output pulse, and determines the length of time in microseconds that the pulse is on, the length of time the pulse was off since the last pulse, and computes the duty cycle, on a per-pulse basis, and displays these timings on the serial monitor.

Later on I'll implement the potentiometer setting of the delay and the duration of an output pulse to a transistor coil driver.

Here's the program sketch so far, for your amusement and tinkering:
http://www.mediafire.com/?fbwun5jbndbec4b

And I'm processing and uploading a little video of it in operation so far... not very exciting but it does show the concept and the serial monitor output.
It will be viewable in a few minutes.
http://youtu.be/tDGqsz-IK28

Hi Tinsel, Micro's are awesome when you know how to program them. I've got the software and I'll order an Eleven board they look like good value, I could drive to Jaycar town and get a kit from Freetronics, which includes a lot of other stuff as well for not much more money which would mean no waiting, I've got quite a few different IC's and Transistors, mosfet drivers already but not any of the actual parts in the kit, I'll need to ring them to find out if they have the kit in stock, apparently the warehouse is out of stock concerning that kit.

I could use the picaxe but I would need to learn how to write the hardware interrupt code. I am capable but it's difficult when I have no previous experience with programming micro's. I'm certain doing these projects will help me to learn a lot more quickly (less time wasting), I like steep learning curves, it means I get to be a bit obsessive. 

I like to use the RPR-220 photo reflector when experimenting because I can stop the motor after I find the right timing and see the reflective strip and where it triggers the reflector with relation to the magnets, I can line it up by eye because I made the angle of the light to reflective strip and back in the radial plane (no need to have the scope on except to make sure the signals are clean, the emitter and receptor are in the one part.

However I think halls are a more practical and reliable method because of dirt, dust or oil ect. I made a module circuit so as to adjust the sensitivity which is very helpful for getting a proper clean signal with optical triggers.

Double or multiple pulsing is useful for getting the rotor up to speed quicker without needing to go too long with the duty on start up. I made a small mistake on my CD4047 signal processing circuit, the retrigger pin needs to be switched between the rails I have it switched between ground and the input signal, small change, but anyway it retriggers to get going up to a few hundred rpm then it's all single pulses.

To all/anyone, with the little generator design, what would be the difference between cutting the shading bars of the core and not after I have separated the "field" poles into two side's ? And should I stick with two large  rotor poles one on each side so just one north and one south ? If for example both a north and a south magnet are engaging the same side/pole of the field for a moment will that waste power ? For example could I make the rotor with 4 x N-S-N-S poles ? With a wound rotor there is only one north and one south on the rotor but they are big and the magnetic effect of the inactive rotor coil is a lot less, nothing I guess, so I am thinking I need to keep only two rotor poles but big ones, like a quarter of the rotor face or more on each side.

Cheers 

I would really like to get a reliable measure or at least a "gauge" of the shaft power before changing test arrangements. Does anyone have an idea I can implement fairly easily to get a benchmark ? I don't need a HP or torque value just a reliable benchmark to gauge against. I'm thinking I'll just hang a given weight from a leather belt over the polished shaft like a friction brake and it should be equal if done the same then I can add weights to load it down and see the most weight it can tolerate hanging over the shaft from a fixed anchor point something like that. But as it heats up the friction value will change. Seems a tricky thing to do reliably but I'll see what I can do. Maybe a turnbuckle and a digital hanging scale for weighing chickens. 

Cheers

P.S Scratch that, I have a simple test load, I found a small KV 1880 - 3 phase model airplane motor, an "outrunner", the outside is what turns with the magnets on it, so I can just put the belt around the outside of the outrunner motor, the pulse motor can hold over 1800 rpm with a 1 Ohm load on one phase (between two wires), I'll try it with two 1 Ohm resistors I guess. If I short a winding it throws the belt immediately. 10 Ohms only loads it a bit. It take a fair bit to turn the three phase motor and the voltage is low but the frequency is relatively high, it'll do for a test load it should remain a stable measure. It produces one volt through a one ohm load so that's neat. It can accelerate under the one Ohm load if kept in the torque range. If I de-tune it too much while the 1 Ohm load is on it suddenly drops speed beyond recovery without removing the load.

Oh and the wave form remains a stable sine wave so measurements are even possible. An improvement in Watts can be found then.



..

I like the resonant charging feature of your
setup - it can provide an additional "boost"
to your supply voltages.  Shouldn't there be
a couple of "check valve" isolating diodes in
the feeds to capacitors C3 and C4?

Very nicely done!

@Farmhand: Very Nice! You are doing a great job of documenting and developing your system. Keep going!

You probably realize that your torque measurement system can provide a known variable resisting drag by externally energizing one of the "extra" windings on the brushless outrunner with some variable DC. You've made a simple dyno system; I wonder if it's possible to calibrate it in standard units somehow.