Hello and welcome to my channel about Inductor-recordings of the VVVF inverters from Trains, Trams, electric buses etc. as well as machines, containing VFDs.
I generally accept requests for inductor recordings for public transportation vehicles within my country (Germany) for now, unless I travel to somewhere else, where I will then post about the visiting country and what public transportation vehicles I should (try to) record. However, it is NOT guaranteed that the recordings will work on all public transportation vehicles due to the fact that some of these vehicles have a too noisy H-Bridge system that covers the PWM-signal noises, generated by the inverter that we want to hear.
P.S.: This is the second channel of ZefiroFireMS7, specifically for this purpose.
I actually attempted to record it, though it is quite hard to do it because of the noise by the inverter and the overhead power lines. Additionally, there are already recordings out there.
That driver certainly worked a lot on the brake there^^ The last part sounded suspiciously like "direct-self-control" to me, but it would've been the first time I'd see it from standstill... Unfortunately there doesn't seem to be a lot of info around for this...
Yeah unfortunately there isn’t much about this train‘s inverter… I also assume that the driver behaved like that because it was very wet and slippery on the rails and some modulations might come from wheel slipping… The last part is in fact the „Asynchronous 550Hz with Random Carrier Frequency Modulation (RCFM), which can sometimes look and/or sound like DSC as you described.
The CAF trams in Talinn (from what I’ve read on Wikipedia) seem to be Urbos trams as well (Urbos AXL). So I would assume they have CAF-IGBT inverters as well, but I‘m not sure. CAF is (as far as I’m aware) known for not using their own inverters like the CAF MA300 for the Rome Metro, which uses Bombardier-IGBT, or the NS SNG, which is a CAF Civity with a Mitsubishi-SiC inverter. Additionally, CAF often utilises the Direct Self Control (DSC) and/or Direct Self Regulation (DSR). The DSC on the Urbos 3-100 is audible in real as well, although it’s quiet. My suggestion is to listen for DSC/DSR, that usually comes after the Asynchronous part, to have at least an indication, that it could be a CAF-IGBT inverter. I hope I could help a bit.
@@firetraxxms4Most CAF Urbos trams use inverters from CAF Power & Automation. That company was created by acquiring propulsion manufacturer Trainelec. Many of their full size metro trains, EMUs and other trains now use those products also. A few examples of CAF (Trainelec) propulsion in a heavy metro setting would include the Caracas Metro and Bucharest Metro. As for motors, CAF typically specifiies those components from Traktionssysteme Austria (most recent projects including Urbos trams) or ABB.
@@firetraxxms4 Well, despite the aluminium body, the inverter is machine room mounted on this train according to the Stadler datasheet. And it's only accessible in the crew cabin.
Hey. For the BR423, it isn’t possible to record due to the very loud H-Bridge noises which makes the actual sound inaudible. For the FS E.464 it’s unfortunately not possible to record it because it’s a locomotive and I have no access to go there and record it. I’m sorry for not accomplishing your suggestions.
@@firetraxxms4s this train rising in frequency or in pulses and it sounds so beautiful in real life listen closely you can hear some pulses before the sound disappears
Hey! Which electronic parts did you use to record, two 100 mH coils, one for each channel? And what do you mean by H-bridge sound, and what could be done against it? And which recorder did you use? I'd be very happy if you could answer my question 😀 I'm another train sound lover!
Hey. It’s actually written in the description about the recording equipment. With the H-Bridge noises I mean the other noise generated by the inverter that messes with the Inductor and as of now, I don’t really see any way to get rid of this noise because the inductance might be over 100mH and it’s really sensitive to any other electric noise. I hope this answers your question (:
