[Inductor-Recorded Traction Motor Sound モハラジオ録音] NYC Subway R142A/R143/R188 [ADtranz/Bombardier] скачать в хорошем качестве

[Inductor-Recorded Traction Motor Sound モハラジオ録音] NYC Subway R142A/R143/R188 [ADtranz/Bombardier]

#モハラジオ #TractionMotorPWMSound #NYCSubway Car Type: New York City Subway R142A, R143, R188 (The sound used in this video is from R143.) VVVF: ADtranz/Bombardier 2-Level IGBT-VVVF Sound Characteristics: PWM Pattern: Asynchronous (250 Hz → 500 Hz Constant) → Advanced PWM (2 Steps) → 3P → Wide 3P → 1P These cars have a type of sound often heard in traction systems for the U.S. market, manufactured between the transition from ADtranz to Bombardier. Basically, it is the same as the MBTA Type 8 cars (which I posted last time), and the advanced pulse modes numbered (1) and (2) in this video also correspond to those in the previous video.    • [Inductor-Recorded Traction Motor Sound モハ...   However, for NYC Subway cars, there is a momentary interruption in the early stages of asynchronous modulation where the carrier frequency rises. All car models had this kind of behavior every time during the recording. This is a behavior that cannot be seen in other manufacturers' traction system, but what kind of control is being performed here? The AC traction PWM sound shown in this video is recorded by a sensor which is placed on the floor of a train car near its traction motor. This sensor is made by myself just using a 100 mH inductor. Due to the resolution of the spectrogram software, the frequency displayed in this video may include some error. Thank you for your understanding. This sound is recorded in March 2019. Sorry, I am NOT taking requests for recordings. Posted by Ebara Express X (Available in Japanese; translate please!): https://x.com/VVVF_tokyu2000 Website "VVVF Database" (Available in Japanese; translate please!): https://vvvfdb.stars.ne.jp Please click here to subscribe:    / @ebaraexpress7260