Instrumentation on a Dual Resonant Solid State Tesla Coil скачать в хорошем качестве

Instrumentation on a Dual Resonant Solid State Tesla Coil

I decided to set up a decent amount of test equipment to look at what I'm sending to my Tesla coil and what it's doing as a result. I use a 20 A Powerstat variable autotransformer stack (for 240 V in) to vary the input voltage to the coil. It's a nice piece of equipment, but very undersized for the job. At this point, I'm fairly confident about running the coil at maximum bus voltage (~680 V), so the Powerstat is not necessary except to limit current while bringing the bus up to that voltage. It will eventually be replaced by a new control box I'm currently building, which initially connects the rectifier to the line through some power resistors, then bypasses them with a contactor after several seconds. Because this is a DRSSTC, an interrupter is necessary to control the coil. My interrupter is remote from the coil. The interrupt pulse is generated at my station and sent over fiber to the coil. The FG502 controls the interrupter frequency, and the PG508 controls the pulse width. The PG508 could be used to control frequency as well, but it has a crappy pot compared to the FG502's smooth and geared knob. The DC504 displays the pulse width, and the DC508 displays the frequency. The SC504 is triggered from the PG508's trigger output. A current transformer cascade (giving ~3.5 mV/A) on the coil is connected to channel 1 on the 'scope to display current. At the beginning of the video, channel 1 is at 1 V/div (~285 A/div), and partway through, I switch it to 2 V/div (~571 A/div). A 200 A LEM current transducer is used to measure the input current to the coil. A regular current transformer would work, since this is AC, but I have tons of these and no suitable regular CTs. As can be seen on the SC501, the power factor of the coil is quite poor, as can be expected from the power supply topology (off-line voltage doubler). From left to right, top to bottom: TM515 Power Unit DC504 100 MHz Counter - showing interrupter pulse width PG508 Pulse Generator - generating interrupter pulse, controlling pulse width SC504 80 MHz oscilloscope - showing primary tank circuit current TM515 Power Unit DC508 1 GHz Counter - showing interruptor frequency FG502 11 MHz Function Generator - generating square wave for PG508, controlling interruptor frequency DM502A Multimeter - measuring RMS input current to coil SC501 5 MHz oscilloscope - displaying input current waveform to coil PG503A Dual Power Supply - powering current transducer measuring input current to coil