【转载 | 电磁录音频谱 | 庞巴迪 IGBT-VVVF】英国铁路Class 387列车（旧）

https://www.youtube.com/watch?v=lm3RdMm5pzc

原视频发布于2024年6月30日
原作者：Youtube@ItsYa165 (https://www.youtube.com/@ItsYa165)
** 经原作者授权许可后发布 **
本视频仅在B站发布，严禁转载到国内其他平台！

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 ---
New video compares acoustics to the EM noise: https://www.youtube.com/watch?v=Jl5o131Z1fM

Class 357/375/377/379/387 traction inverters - the Electrostar sound when running on 25kVAC and not the 750VDC power mode: https://www.youtube.com/watch?v=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.

Mistake: where it says 6P while braking, this is supposed to say MP.

Pattern: 1000Hz Async, 15P Sync, 6P Sync, 5P Sync, 3P Sync, 1P Sync.

Bombardier Transportation UK Ltd, the previous developer of the Electrostar platform, is now owned by Alstom Engineering and Services Ltd.

Noise reduction post-processing:
44100Hz sample of the ACU, HVAC, and Transformer
48dB reduction
Triple sensitivity with no smoothing

Filter:
50Hz 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

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