Screwy Nick Posted July 20, 2023 Author Share Posted July 20, 2023 Jerry, thank you for the compliment, more like STUBBORN man. Chuck, you pegged it: What is cogging torque? "Cogging torque is the torque needed to overcome the opposing torque created by the magnetic attractive force between magnets on the rotor and the iron teeth of the stator. There are multiple rotor positions within a revolution where the cogging torque is high. Cogging torque can be minimized by adjusting the pole and slot count of the motor, by skewing the magnets on the rotor, or by skewing the lamination stack. By design, slotless motors have zero cogging torque as they have no iron teeth in the stator". Since I don't have the ability to do any of the suggestions decided to try 'pulse wave' to kind of kick start it, and to my surprise it worked. Till I got carried away, wasn't watching meters and fried the test circuit. Parts in transit. Quote Link to comment Share on other sites More sharing options...
Screwy Nick Posted July 23, 2023 Author Share Posted July 23, 2023 Pulse Wave appears to address cogging, which allows the truck motor to start at 2V and smoother than direct DC from the generators which started with a surge. Stumbled on a replacement circuit for a Childs ride in/on battery powered toy. Has a higher threshold and is also protected to re-set if over loaded. Couldn't possibly build it with the safety at twice the price, and no burned fingers. Quote Link to comment Share on other sites More sharing options...
Dash 8 Posted July 24, 2023 Share Posted July 24, 2023 I think you need this or i am wrong…:( Bell-shaped armature motors are also called Faulhaber motors or "Fauli" in jargon, since the drive principle with ironless skew winding of the armature coil of a bell-shaped armature motor was developed in 1958 by Dr. Fritz Faulhaber was applied for a patent. In addition to Faulhaber, well-known manufacturers of coreless motors include Maxon and Escap Quote Link to comment Share on other sites More sharing options...
Screwy Nick Posted July 24, 2023 Author Share Posted July 24, 2023 Jan, thank you, this is very relevant to what I am doing. Had this type of motor been in the model I would be much further along, and not have additional electronic board to deal with. I unfortunately am working with the motors the manufacturers provided, brushed and can I say not of the best quality. Any further information you have or can direct me to is greatly appreciated. Bug sends his best to Max and Moritz Quote Link to comment Share on other sites More sharing options...
Sean Posted August 1, 2023 Share Posted August 1, 2023 Keep on Trucking ... I mean Keep on Steaming .. Quote Link to comment Share on other sites More sharing options...
Screwy Nick Posted August 2, 2023 Author Share Posted August 2, 2023 Sean, thank you for the encouragement. Haven't put it up, but not devoting a lot of time to it, right now. The weather eased up some so several small not involved projects will be underway on the deck and fresh air. Stay Well and keep STEAMING. Quote Link to comment Share on other sites More sharing options...
Chuck Posted August 4, 2023 Share Posted August 4, 2023 Oh I'm sure that you'll get it all figured out! Quote Link to comment Share on other sites More sharing options...
Screwy Nick Posted August 5, 2023 Author Share Posted August 5, 2023 Chuck, thank you for the encouragement, more testing today. Stay Well Quote Link to comment Share on other sites More sharing options...
Screwy Nick Posted October 21, 2023 Author Share Posted October 21, 2023 Said I was stubborn. Was loosing as much as I was using, AIR. Very bright light and mag glass brought to light oblong holes holding shafts, fixed and realign gears for better tooth contact and less drag. Found an adjustable pulse wave circuit that didn't use a lot of V. Lastly a different generator that produces more V at less RPM. Still a ways to go to get what I want. Quote Link to comment Share on other sites More sharing options...
Dash 8 Posted October 21, 2023 Share Posted October 21, 2023 I would say: Many roads lead to Rome... or trial makes wise. Regards Jan Quote Link to comment Share on other sites More sharing options...
Screwy Nick Posted October 22, 2023 Author Share Posted October 22, 2023 Jan, thank you. I don't know about WISE, but can tell you a whole lot of what doesn't work. These are just the gear/generator notes, another whole folder just for the boiler mods and other stuff. Not counting the countless videos on the lap top. Still havin' fun. Quote Link to comment Share on other sites More sharing options...
Sean Posted October 23, 2023 Share Posted October 23, 2023 Quote Link to comment Share on other sites More sharing options...
Screwy Nick Posted October 24, 2023 Author Share Posted October 24, 2023 Sean, thank you. Here's just one of the things that make me scratch my head! Three increasing pressure, RPM's but the power output remains the same??? Fiddling with the pot on the pulse circuit will release the stall and allow power to increase which also starts the wheels. Can then adjust pressure/rpm to vary voltage and wheel speed. But starting again from dead stop, same results. Any thoughts??? Quote Link to comment Share on other sites More sharing options...
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