Description
https://www.youtube.com/watch?v=Jl5o131Z1fM
原视频发布于2025年5月13日
原作者：Youtube@ItsYa165 (https://www.youtube.com/@ItsYa165)
** 经原作者授权许可后发布 **
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原视频标题：Bombardier IGBT VVVF | Class 387 Traction Sound | PWM Inverter - Class 387 Inductor Recording
--- 以下为原视频简介 ---
Class 357/375/377/379/387 traction inverters - the Electrostar sound when running on 25kVAC and not the 750VDC power mode: • Bombardier IGBT VVVF | Class 377 Traction ...
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