Bombardier IGBT VVVF | Class 387 Traction Sound | PWM Inverter - Class 387 Inductor Recording

Class 357/375/377/379/387 traction inverters - the Electrostar sound when running on 25kVAC and not the 750VDC power mode: https://youtu.be/BRwYK2Qv9kM

Listen closely and see the three-level PWM patterns from the Mitrac 1000 (TC1XXX used for DR1000 ACIMs) Train Control & Management System (TCMS used as a TCU) which run the Class 387 traction motors.

1000Hz Async, 15P Sync, 6P Sync, 5P Sync, 3P Sync, 1P Sync. Electrostars use voltage vector control with FOC (e.g. SVM).

Noise reduction post-processing:
- 96000Hz sample of background noise
- 36dB reduction
- No smoothing

Filter:
- 50Hz*n band
- 102dB reduction

Equipment used:
- 2x 1000mH telephone pickup coil
- Sony ICD-PX470

Class 357 Traction Motor Sound
Class 375 Traction Motor Sound
Class 377 Traction Motor Sound
Class 379 Traction Motor Sound
Class 387 Traction Motor Sound

00:00:00 Electromagnetic Sound
00:31:25 Natural Sound
01:02:48 Electromagnetic & Natural Sound

#induction #inductorwindingmachine #motor #vvvfサウンド #vvvfインバータ #vvvf #train

Видео Bombardier IGBT VVVF | Class 387 Traction Sound | PWM Inverter - Class 387 Inductor Recording канала ItsYa165