Bombardier IGBT VVVF | Class 345 Traction Sound | PWM Inverter - Class 345 Inductor Recording

Recorded in the depths of the Elizabeth Line tunnels - Class 345 traction inverters - part of the Aventra platform for the UK using the Mitrac TCMS. We can see: 550Hz RCFM, followed by various sync modes including more use of 9P, like with the BR442 Talent 2 and less like the Class 720 which may skip this. Noise reduction post-processing: White noise reduction Manual noise removal Equipment used: 1000mH telephone pickup coil Sony ICD PX470 Class 345 Traction Motor Sound Class 701 Traction Motor Sound Class 710 Traction Motor Sound Class 720 Traction Motor Sound Class 730 Traction Motor Sound #induction #inductorwindingmachine #motor #vvvfサウンド #vvvfインバータ #vvvf #train