Arthur, I built a small working model that I run in the lathe.After some (many) modifications I have this scope shot, is this close to what you recommend?Thanks,Ron
Yes, exactly what is needed at the final stage of assembling the device. but today Nali will be testing the control of the magnetic flux coils in the rod. to make it clear what I mean. At this stage, his signal should be close to the sine.
Now also connected the small coils in series as indicated.First scope shot is the voltage on the big coils with the small coils not shorted.The second scope shot is the voltage on the big coils with the small coils shorted.Somehow the trace is not really even/balanced. Anyway with the small coils shorted the voltage goes way up.
hi nali. Yes it's good! it should be. short coils will control the current rise in the transformer. but first you must make sure that the frequency is doubled. if in standard mode you have, for example, 50 hertz at 3000 rpm, now you should have 100 hertz. Now I will draw a circuit for connecting the igbt, do you have the opportunity to assemble a circuit from drivers and transistors? I found a control scheme, but it will be difficult. To get started, you just need optical sensors, drivers and transistors. driver power must be decoupled
I am not really sure what you mean with "standard mode" you mean 'standard mode' is the frequency a single large coil will give?I will do the rpm/frequency test. Still waiting on a new tachometer.Part of my daytime job is designing and building circuits/PCBs so no problems there. I also do firmware programing. So if that is needed it should be no problem. Yes please show me a circuit and description that explains what all the components of the system need to do.
Hi Arthur,I now have a working tacho meter. I ran the generator at 1000rpm and got 67hz on the 4 big series coils.Is this the double frequency you are taking about?Sounds pretty high for just 1000rpm.
in the diagram, the transformer works in push-pull mode, but at first it can be obtained with one transistor. By the way, approximately the same scheme was used by Slabodyan if you knew him. This scheme is nowhere to be found on the Internet, so it is better not to show it to the public.
Thanks for the info and schematic. I will study and make it. I do not know Slabodyan. Who is he?Are the small coils not part of the schematic? What needs to be done with those? Or are they permanently shorted?
hi nali, at this stage the short coils will be short-circuited, you should get a stable operation of the transformer in push-pull mode. after that you study the process, you look at the signals on the transformer and on the generator, the speed of the generator, the frequency, when we see the desired mode, we will switch to the control of short coils
the most important are isolated channels. In this model, the channels are isolated. And I found out that there are several models with isolated channels in the 2000 series. This is one of the available models.
Hi Arthur,Indeed the 2000 series from Tektronix has isolated input channels but the first 3 letters in the type designation are TPS and not TDS, ok? https://www.tek.com/datasheet/digital-storage-oscilloscopes-1 https://www.tek.com/document/selection-guide/oscilloscope-selection-guide Gyula
I am satisfied with the 2014C model. it costs us about 2000 dollars. I need another 700 $. I will have a salary of which $ 200 I will add. but I need to find another $ 500 soon.
Gyula, write me an email. I accidentally deleted your message.
Arthur, I did not write any email to you, you deleted someone else's email. Perhaps you can retrive the deleted email from your Trashbox? Gyula