Beneficial Mod To the SSG Circuit

[scooterscottii]

I have noticed an interesting effect with my bedidi circuit motor. If I stick some neo mags to the (outside facing) core of the bifoliar coil it will speed up the rpms by about 30%. inversely if I turn the mags around it slows the rpms. What do you think is happening? Scooterscottii

[theDaftman]

Hi nice work again I do like to watch your vid's. Put a 3mm strip of tape from the inner to outer edge of your top disc then spray it mat black pull the 3mm tape off and take a new RPM reading. You will see a big difference in your RPM readings.

[Drevtoobe]

Hey to say something real about improving your motor, with the RPMs getting higher, the magnets between the two CDs must be displacing a lot of air. Air friction is becoming a factor now.

Do they call it "Saran wrap" in the UK? You could try sealing off the edge face of the disk with some tightened Saran wrap or something, so that the entire rotor looks like a smooth solid disk in order to reduce air friction.

Also, the bearing from a big older hard drive might be worth looking into.

[Pwordchernoir]

I had thought about the air friction, nice suggestion! I took some time and have nicely taped the outer edge, I can feel much less air displacement around the rotor now. Obviously efficiency goes up. Sry to hear bout ur disputes , cold electricity seems like a bit of a misinterpretation to me! Also, batteries as we have come to know behave strangely under different circumstances as a direct response to their design, as you say.

[Drevtoobe]

Hey there, nice to see you are still doing your thing. Did you see that I had a fight with Introvertebrate? lol

I did a mini posting blitz on Zeropointprophet's last few pics where I elaborated on a few topics:

What is a battery's output impedance? (again)_

How can you measure a battery's output impedance?

A great new idea for measuring the REAL current consumption of a pulse motor using a power supply, a variable resistor, and a big tank cap.

[Drevtoobe]

Oops.. "last few clips".

Once I did a search on "cold electricity" and looked at a bunch of Plengo's clips where he goes crazy with a breadboard with dozens of LEDs powered by "cold electricity". Anyway he does one experiment where a 9-volt battery powers some LEDs for weeks, and the battery is measuring about 1 volt. The LEDs are barely on. He disconnects the battery and is shocked to see that the battery now measures about 6 volts and climbing.

[Drevtoobe]

When I saw his surprised reaction on the unloaded battery voltage, I was SHOCKED myself. Here was this guy doing a half-dozen clips with batteries and LEDs and "cold electricity" and he doesn't know his ass from his elbow about batteries.

I knew as I was watching the clip that he was going to read a higher voltage. A battery starts off with a low output impedance, and when its chemical energy is nearly expended its output impedance starts to rise.

[Drevtoobe]

If you don't know about the concept of a battery's output impedance then you should check out my comments @Zeropp

With respect to measuring the current consumption of a pulse motor, the new idea of using single very large tank capacitor and a variable resistor and a power supply is essentially a different way of doing the low pass filter that I made reference to before. The key thing is that it is a REAL current/power measurement methodology. Everybody knows it's cheating to use a multimeter.

[dodoshlodo]

Hey guys just a question about the SSG circuit if anyone could help, much appreciated. I've built a simple pulse motor and im trying to improve it.. Couldn't the trigger coil part of the circuit that turns on the transistor be replaced with a reed switch and a small power supply in series to activate transistor?

[Drevtoobe]

"Couldn't the trigger coil part of the circuit that turns on the transistor be replaced with a reed switch and a small power supply in series to activate transistor?"

Yes that sounds like a great idea. You no monger have to worry about the reed switch burning out because the coils current is not going through it any more.

You should connect a 1k resistor between the transistor base and the emitter. That way when the reed switch opens the resistor will switch the transistor off faster.

[Drevtoobe]

You also don't need a separate power supply to switch on the transistor. All you need to do is connect a 10K resistor between the +12 volt terminal of your battery through the reed switch. The other side of the reed switch then connects to the transistor base and it's associated 1k pull-down resistor.

I think that this will switch the transistor completely on with full conductivity. If not, perhaps lower the 10K resistor to 7K or something like that.

[Drevtoobe]

I don't know why nobody thought of that before! It's a great idea! The reed switch will never burn out and you can move it around to change the timing of the firing of your driving coil!

[dodoshlodo]

I've found that as the speed gets faster the reed switch likes to be placed in different position. ie. as it gets faster the timing of the pulse changes and it wants to be activated earlier - this might be exagerated by my relay which is slower (lag) than a transistor. I like the flexibility of moving it around.

Also I cant be bothered winding the coil bifiller - Why cant the trigger coil be separate anyway? u can change the timing of the pulses just like with a reed - Cheers

[dodoshlodo]

i see so the resistor allows it to pull a bit on energy from the battery allowing it to switch on the power coil? is that right?

cool that solves my problem, at the moment i have a relay being activated by reed and 5V small power supply - obviously i want to get rid of this 4 better efficiency. plus the relay doesn't work properly once it gets up to fast speeds. I made this rig just to see a pulse motor in action - next step SSG