On a sunny day (4 May 2017 14:35:57 -0700) it happened Winfield Hill <hill@rowland.harvard.edu> wrote in <oeg6rt08pg@drn.newsguy.com>:>Jan Panteltje wrote... >> >> Do it the China way: >> http://panteltje.com/pub/inductive_coupling_real_power_300Vpp_IMG_6092.JPG > > More details, please.The picture comes from an email discussion I had with Bill Sloman some time ago, about what was it? Baxandal (Bill correct me). I think Bill recently posted the circuit diagram here? But anyways (looking up emails): http://kaizerpowerelectronics.dk/wp-content/gallery/2013_01_17_-_royer_induction_heater/royerIH.gif this sells on ebay as: http://www.ebay.com/itm/291765797495 (many sellers) The flat coil in my picture is for inductive cooking (discussed here long ago). I just needed some high voltage high power high frequency sine wave, so made a simple air transformer, not efficient that way, but by moving the coils apart you can control amplitude. This is with better coupling (230 V light bulb): http://panteltje.com/pub/inductive_coupling_100kHz_500Vpp_IMG_6101.JPG The copper pipe gets warm.. Frequency is set by number of turns and C values. It is easy to make your own: http://panteltje.com/pub/12V_to_300Vpp_converter_detail_all_there_is_to_it_IMG_6111.JPG but that one has no nice sine wave as the cores saturate...: http://panteltje.com/pub/drone_power_small_core_test_IMG_6114.JPG It will be used to power my drone via a thin RG178 (IIRC) coax, so it can stay up indefinitely with an antenna for something I want to test. I send high voltage low current up, and transform at the drone back with ringcore to 7.5 V 10A or so. I ordered 30 meters coax from Bad Seller on ebay for this, and received this: http://panteltje.com/pub/bad_Chinese_RH178_IMG_6167.JPG damaged in many places, and came in 10 + 20 meters connected like this: http://panteltje.com/pub/bad_Chinese_RH178_IMG_6166.JPG so YMMV with China (about 50% crap ATM). I contacted Bad Seller and he assured me it would work fine like that. I gave him the first zero rating I ever gave to an ebay seller. Anyways that project is waiting for better weather, better stuff is on order. Does this answer any of your questions? If not, then I could draw a circuit diagram of http://panteltje.com/pub/12V_to_300Vpp_converter_detail_all_there_is_to_it_IMG_6111.JPG but I usually skip that part and I have not used spice for a long time (it is fake as you know). and nobody can read my pencil drawings anyways it seems... But it is much the same as the one at the start of this story, except I use a center tapped core, Bill will fill you in on how to name those configurations ;-)> >-- > Thanks, > - Win >
200kHz oscillator
Started by ●May 2, 2017
Reply by ●May 5, 20172017-05-05
Reply by ●May 5, 20172017-05-05
On a sunny day (Thu, 4 May 2017 14:55:20 -0700 (PDT)) it happened Lasse Langwadt Christensen <langwadt@fonz.dk> wrote in <eb1e4c37-d7ab-4e29-98b4-432a8d712a54@googlegroups.com>:>Den torsdag den 4. maj 2017 kl. 23.36.18 UTC+2 skrev Winfield Hill: >> Jan Panteltje wrote... >> > >> > Do it the China way: >> > http://panteltje.com/pub/inductive_coupling_real_power_300Vpp_IMG_6092.JPG >> >> More details, please. > >the pcb looks like one of those cheap chinese induction heater driver, >based roughly on this: > >https://markobakula.files.wordpress.com/2012/10/royer_ih.pngYep.
