[Inductor-Recorded Traction Motor Sound モハラジオ録音] JR West 500 Series [Toshiba GTO-VVVF]
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#モハラジオ #TractionMotorPWMSound #500Series
00:00 Title & Introduction
00:05 Start of Acceleration
01:20 Re-acceleration 1
04:16 Re-acceleration 2 (to 275km/h)
06:31 Braking
Car Type: JR West 500 Series Shinkansen
Traction: Toshiba 2-Level GTO-VVVF
PWM Pattern:
Asynchronous (365 Hz) → 15P → 9P → 5P → 3P → Wide 3P → 1P (Acceleration)
1P → Wide 3P → 3P → 5P → 9P → 15P → 27P (Braking)
Sound Characteristics:
Like the 300 Series Shinkansen that came earlier, this train has the typical '90s
Toshiba sound which uses the 365 Hz carrier frequency for the asynchronous modulation. 27P was also used during acceleration for the 300 Series, but this traction uses the 15P just after the asynchronous mode like conventional trains of JR West at the time (681 Series, 207-1000 Series, 223-0 Series, and 281 Series). However, the 500 Series also uses the wide 3P mode, which is rare for this generation of Toshiba tractions. Therefore, the pattern is the same as that of the South Shore Line single-level cars during acceleration, and the Toshiba/Woojin GTO cars of KORAIL during deceleration.
You may notice that the sound is a little shaky, which is noticeable in the 15P section. This is probably due to the beatless control for cars under AC electrification (it is more obvious in the 300 Series and the JR Hokkaido 721-4000 Series, which uses the 27P).
The recording was done in the car #2 (526-7010) of the V4 formation, on the downbound Kodama train from Okayama to Shin-Kurashiki. Measured with a speedometer app, the train reached 275 km/h in this section (for reference, the inverter frequency reached 160 Hz). The aluminum body of the car makes it impossible to record directly on the floor with using an inductor, but it is able to record clearly at the handrail inside the end section (see the last photo) of even-numbered cars placed between the pair of a car with 2 traction control units (TCUs) and a car with no TCU. Probably the noise from the lines between the TCU and the next car's motors easily leaks at this position. Of course, if someone needs the handrail or Braille, you will have to give it up.
As of July 2022, the 500 Series trains are undergoing equipment refurbishment and being taken out of service, this sound can only be heard on two trains, the V4 formation (which I recorded) and the V9 formation (which is in the title photo). These are also in an unusual situation for the Shinkansen, as the equipment has been in use for nearly 25 years, so it is difficult to say that they too are in safe hands. If you want to record them, please do so as soon as possible.
* The AC traction PWM sound shown in this video is recorded by a sensor. This sensor is made by myself just using a 100mH 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 June 2022.
* Sorry, I am NOT taking requests for recordings.
Posted by Ebara Express
Twitter (Available in Japanese; translate please!)
https://twitter.com/VVVF_tokyu2000
Website "VVVF Database" (Available in Japanese; translate please!)
http://vvvfdatabase.starfree.jp
Please click here to subscribe!
https://www.youtube.com/channel/UCN4LXytl0TT2Iv4JDClKVvQ
00:00 Title & Introduction
00:05 Start of Acceleration
01:20 Re-acceleration 1
04:16 Re-acceleration 2 (to 275km/h)
06:31 Braking
Car Type: JR West 500 Series Shinkansen
Traction: Toshiba 2-Level GTO-VVVF
PWM Pattern:
Asynchronous (365 Hz) → 15P → 9P → 5P → 3P → Wide 3P → 1P (Acceleration)
1P → Wide 3P → 3P → 5P → 9P → 15P → 27P (Braking)
Sound Characteristics:
Like the 300 Series Shinkansen that came earlier, this train has the typical '90s
Toshiba sound which uses the 365 Hz carrier frequency for the asynchronous modulation. 27P was also used during acceleration for the 300 Series, but this traction uses the 15P just after the asynchronous mode like conventional trains of JR West at the time (681 Series, 207-1000 Series, 223-0 Series, and 281 Series). However, the 500 Series also uses the wide 3P mode, which is rare for this generation of Toshiba tractions. Therefore, the pattern is the same as that of the South Shore Line single-level cars during acceleration, and the Toshiba/Woojin GTO cars of KORAIL during deceleration.
You may notice that the sound is a little shaky, which is noticeable in the 15P section. This is probably due to the beatless control for cars under AC electrification (it is more obvious in the 300 Series and the JR Hokkaido 721-4000 Series, which uses the 27P).
The recording was done in the car #2 (526-7010) of the V4 formation, on the downbound Kodama train from Okayama to Shin-Kurashiki. Measured with a speedometer app, the train reached 275 km/h in this section (for reference, the inverter frequency reached 160 Hz). The aluminum body of the car makes it impossible to record directly on the floor with using an inductor, but it is able to record clearly at the handrail inside the end section (see the last photo) of even-numbered cars placed between the pair of a car with 2 traction control units (TCUs) and a car with no TCU. Probably the noise from the lines between the TCU and the next car's motors easily leaks at this position. Of course, if someone needs the handrail or Braille, you will have to give it up.
As of July 2022, the 500 Series trains are undergoing equipment refurbishment and being taken out of service, this sound can only be heard on two trains, the V4 formation (which I recorded) and the V9 formation (which is in the title photo). These are also in an unusual situation for the Shinkansen, as the equipment has been in use for nearly 25 years, so it is difficult to say that they too are in safe hands. If you want to record them, please do so as soon as possible.
* The AC traction PWM sound shown in this video is recorded by a sensor. This sensor is made by myself just using a 100mH 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 June 2022.
* Sorry, I am NOT taking requests for recordings.
Posted by Ebara Express
Twitter (Available in Japanese; translate please!)
https://twitter.com/VVVF_tokyu2000
Website "VVVF Database" (Available in Japanese; translate please!)
http://vvvfdatabase.starfree.jp
Please click here to subscribe!
https://www.youtube.com/channel/UCN4LXytl0TT2Iv4JDClKVvQ
