My Motors got me to Tap into Radiant Energy

[prochiro]

@ Kogs
JohnStone sent me his file some time ago but I need to find it in my computer. Here is what I can find at the moment, its a start.
https://www.dropbox.com/s/4dip28wcge...0V5.1%20.T3001


Dana

[prochiro]

@ kogs
Here is Bro Donalds version for T3001. He has split the Monster into two parts and thus files.

https://www.dropbox.com/s/y9pdvs3ckz...O%20FETS.T3001

https://www.dropbox.com/s/61j6dbpqcs...%20Board.T3001

Dana

[tmasaitis]

Multi MOSFET Driver expansion

Ufo requested for his current setup a four phase oscillator.
Post
Post
I threw some components into the circuit and ask for discussion. It is what I intend to build.

The reason for using a microprocessor is because the circuit with logic ICs is lots of wires to draw and one use only. A micro is much more precise and versatile to use.
@Lester: Some suggestions for i.e. snubber circuit? Suggestions for additional protection?
@Nico: Arduino connected correct? What about modified program? Where did you connect your POT / LCD exactly?

TBD:

• 555 NMOS (slow but 200mA source sink at output) or CMOS (fast but 8mA only) - needs to be tested
• Control for dead time and frequency: Pot, digital pot or by simple terminal program from PC (USB)
• Display required?
• Option for current measurements required?
• Use of reset at pin at 555 in order to prevent unintended firing of FETs while program downloed and aother actions.

With some additions (voltge feedback) this circuit can peform as SMPSU - not high end precision PSU but suffitient in order to control the voltage for our loads from battery stack or welder. It depens on your requirements and your setup.

JohnS

Hi John and all the rest of guys, I was monitoring all this thread and also doing some replications. I believe to handle FET gate capacity issue to drive multiple FET's simultaneously should be helpful to use this IC ULN2801A-ULN2805A, it can be driven from arduino as well (that's where I have found it)
to connect 1 FET per output, to keep up with switching speed. What would be your suggestions Mr. John ? it also can be stacked 2, 3 ,4 IC depending on Amperage requirements. 1 IC can drive 8 FET's.

Tom

[prochiro]

Hello All

For those wishing to see what I used to make the Quad pulser on one board here is the T3001 file. I did take out some of the components visually but all one needs to do is go to view, layers, and hide all layers but the wires and print on your etching paper (two copies) and etch. This is the lower half.
https://www.dropbox.com/s/bg2gzz2lv5...fetsver3.T3001

This is the upper half.
https://www.dropbox.com/s/32n4561oal...-%20V1.1.T3001

I showed these just as an example but you can modify your files any other way you want to.
Dana

[Donald Haas]

Help for KOGS if needed

@ kogs
Here is Bro Donalds version for T3001. He has split the Monster into two parts and thus files.

https://www.dropbox.com/s/y9pdvs3ckz...O%20FETS.T3001

https://www.dropbox.com/s/61j6dbpqcs...%20Board.T3001

Dana

Hey Brother Kogs,

Please contact me via my email address for any questions or help with the above linked items.

brodonh@verizon.net

I've etched them and got them to work very well and may be able to save you some time and grief.

bro d

[JohnStone]

Hi John and all the rest of guys, I was monitoring all this thread and also doing some replications. I believe to handle FET gate capacity issue to drive multiple FET's simultaneously should be helpful to use this IC ULN2801A-ULN2805A, it can be driven from arduino as well (that's where I have found it)
to connect 1 FET per output, to keep up with switching speed. What would be your suggestions Mr. John ? it also can be stacked 2, 3 ,4 IC depending on Amperage requirements. 1 IC can drive 8 FET's.

Tom

Hi Tom,
you can drive FETs by plenty of means and all will work fine IF they fit to application. I extended all my knowledge in posts before on why it is essential to switch fast and distinct. Driving severe motors like Imperial one with several hundred amps peak current does not accept second level driving. You never will lubricate a racing machine with salad oil while for driving very gently it will suffice possibly.
My driver was developed on request and dedicated especially to Imperial driving or similar applications.
Nevertheless I encourage to experience different driving schemes for lower power tasks. ULN series is one of my preferred ICs for simple driving all sorts of small power devices.
JS

[Cornboy 555]

Hey.

Great to have you back John Stone, hope all is well.

Warm Regards Cornboy.

[wormtrojan]

A new circuit

Hey Ufo，hey everybody，the circuit issue is an old issue now，but I've just started to build this stuff. I remember that Ufo said that the rising and falling edge should be sharp enough，otherwise it is not certain what kind influence it would bring. Here is a pic that shows the waveform from the coil when using the 555&393 circuit.This circuit allows us to adjust the duty cycle and frequency independently.

It is showing that the rising and falling edge is not that perfect. After some research I've found that it is due to the limit of lm393(at least as my personal opinion). So I've tried to make some changes to this circuit, making a circuit which allows us to adjust the duty cycle and frequency independently, meanwhile has the sharp rising and falling edge. I just replace the lm393 with another 555. It looks like this.

And here is a pic showing the waveform from the coil and the frequency. It is closer to perfection.

It should be noticed that the waveform is from the coil, which is powered by the 36v DC supply. It is not directly from the output pin of lm393 or 555.

[wormtrojan]

Sorry...

Sorry that in the last pic, the frequency counter is covered by the oscilloscope,here's a new one~

[wormtrojan]

Some information about this circuit.

It is not that simple as the 339 circuit, the 555&393 circuit, or the double 393 circuit. But the 555's output can make the rising and falling edge sharper. The pot in IC1 is used to control the frequency, while the other pot is controlling the duty cycle. But when controlling the duty cycle, it is actually the "Width" that is being adjusted. So if we keep the second pot unaltered and dial the first one to adjust the frequency, the on time width of the output will stay unaltered. So we need to choose the C6-C9 capacitor carefully, and when adjusting the frequency, we need to adjust the duty cycle at the same time. It's pretty complicated, but has a better output performance. I hope I'm helping here. Good luck to everybody.
Regards.

[lerameur]

Hi UFO,

been holding off the Coil test. Was too anxious getting started with the motors. here is a picture with commutators and bearings removed, also the rotor spent time in an over to easily remove the copper wire, Here are the results. One magnet missing in the 2HP stator. But as, there is no way I can fit the two commutator on each end of the shaft.
I may have to bring it to a mechanic work shop to have an insert made .

Joel

[sampojo]

Some Questions on BOM components MD5

@JohnS or whoever...

Hi John, glad you have been finding some time to post lately!

On R3 & R9 lines 8/9
-----------------
8 R3 1R 0204_MET optional / for tuning / metal fim
9 R9 1R 0204_MET optional / for tuning / metal fim
-----------------

What is the ohm value of these resistors? I am confused by "1R". Is this supposed to be 1 ohm?

I guess they are metallic or metallic film? Something more that 250 mW?

On the capacitors
---------------
10 C18 1µF C_ELKO_RM5,08_DM6 pitch 5.08mm / 6mm diameter / >20V
---------------
Most any 1uf polarized cap OK? Mouser brings up a "bipolar" cap. Is that no good?

[sampojo]

Monster Pulser V5.1, latest and greatest circuit

@worm

It is not that simple as the 339 circuit, the 555&393 circuit, or the double 393 circuit. But the 555's output can make the rising and falling edge sharper. The pot in IC1 is used to control the frequency, while the other pot is controlling the duty cycle. But when controlling the duty cycle, it is actually the "Width" that is being adjusted. So if we keep the second pot unaltered and dial the first one to adjust the frequency, the on time width of the output will stay unaltered. So we need to choose the C6-C9 capacitor carefully, and when adjusting the frequency, we need to adjust the duty cycle at the same time. It's pretty complicated, but has a better output performance. I hope I'm helping here. Good luck to everybody.
Regards.

Pretty good work, worm. Have you checked out the Monster Pulser V5.1 released by John Stone here on the motor thread and on this thread?

Using the Arduino to do PWM with it, shifted completely off the 555. Now looking at Arduino interrupt capability to establish a governor capability to adjust to load changes.

Here is the CAD program JS used to make the circuit, free: Target 3001

Here is the primary CAD circuit.

Production zip file posted by John Stone at Pg. 59 Post 1768.

I don't know where I got this one but it is great, on my dropbox. MD_V5.1-prerelease.pdf

[sampojo]

Resistors R3, R9; Capacitors C7, C8 ?

OK looks like Resistors R3 & R9 are 1 ohm. In the center of this top view (obtained from MD5.1 - prerelease.pdf), you can read the resistors' color codes, 1 ohm.



Now C7 and C8 are both 100nf but one is triple the size of the other and there are 2 of the big blue ones. There is nothing noted on the BOM about why the difference. I imagine it may be a voltage issue. Checking several parts distributors, I can't find anything like it.

I have just spotted the BOM in the pre-release labelled pdf is newer and better than the one I was using. Word to the wise... See my previous post, it is on my dropbox...

Looks like the non-electrolytic caps are tantalum?

On these passive components, will the circuit be sensitive and not tolerate if I cannot find the exact form factors?

On line 10 of the BOM:
10 7 C1,C4,C8,C9,C12,C13,C15 100nF 6X3R5,08 pitch 5.08 mm / diameter 6mm / voltage > 20V

1. For the bolded #'s, do they mean 6mm by 3mm, Radial casing for the "R"?
2. Is pitch the lead spacing?

Can I get some clarification? Dana? John Stone?

[sampojo]

working to get the Monster drive PCB into production

gravitating toward ExpressPCB.com, ~$100 for 4 circuit boards

They want it in their own software format. Still trying to convert the T3001 files into their PCB tool, but checking to see if they will take the gerber data.

Schematic correctected 6/15/13
here is the circuit pic in their tool:

Here is the BOM