If I had to guess I would say the engineers had this as an audible troubleshooting tool. You can hear if and when your inverters were acting up without any extra tools. This would also be useful for the driver/conductor or other people in the loop as they could inform someone that some specific train wasn't singing correctly
When I was a kid, I connected a small DC motor to the speaker terminals on a radio and made a very inefficient speaker. If I touched the drive shaft to a surface, I could hear the radio. It worked quite well touching a glass window.
@@eljaibas16 I did it with an MWO transformer, to get electrocuted with the rhythm of the music. It was fun until it got truly scary when I cranked volume too high up and heavy beats came from the music (it was on a somewhat powerful home stereo amp). *Seriously dangerous, do not try it.* But, the transformer was also audibly singing indeed!
haha the green ones with white lines. I think the English translation of the way they are called is "number trains" idk. 81-717/714 type. I have not heard the new ones make the same sound. At least in Moscow.
The soul of the car is the sound of combustion, the vibrations and the control you have. EV's have no soul, no matter how much they try those fake sounds. Rimac might have a decent sound that gives it a soul, but will never replace the sound of combustion nor is it as much as exciting
As a developer for multi megawatt inverters that have wide range of different sounds between 1...10 kHz, iam always disapointed from the sound of my EV.
In Central EU there are trains that still uses theese. Freight trains, like Siemens Taurus, ect. When an OBB Taurus is departing from our local station, I allways stop, and listen to it, it is so god damn good...
this reminds me of jubilee line, I've always loved the way it sounded, sounds like a car changing gears.. if I was designing an electric sports car i'd definately consider integrating a similar system instead of those fake speaker pumped noises we see nowadays
When braking, energy is returned to the inverter capacitor. Which can explode. Therefore, for safety, this energy must be dissipated using a brake chopper or returned to the electrical network.
Modern inverter are better in making real sine waves therefore they make less noise and are more efficient. A low power equivalent are stepper motor drivers. Some people played songs on printer or even floppy drives with that.
@@AttilaAsztalosYes, however those are intentional, and done without moving the motor shaft. During actual operation, the brushless motors don't actually make much sound.
for the 100th anniversary of the ÖBB (Österreichischhe Bundesbahn - Austrias train company), they controlled the inverters of some trains, so that the trains played Happy Birthday
4:55 I think that engineer just needed to deal with switching frequency in audible spectrum..so they decided to tune it, instead of let it annoyingly whine...
Every possible permutation of singing train is used here in the UK, it's great! 😂 I even remember the old resistor bank DC controllers with their clickity clack.
actually, the reason for the switching frequency change even though it is an induction motor is to control the losses during startup and very high slip conditions
While most people would consider it noise compared to this, the electric motors in my local metro have a very distinct sound, even after they changed the old trains with the new ones... It just gets into your brain. I would have loved it if you showed the code to make the various sounds...
The "Singing Trains" of Montreal Canada were so iconic, that the residents of the city voted to make the sound they made, the new chimes that play when the doors are closing. Even though the vast majority likely had no clue what caused the sounds One model of train in Montreal using the old Jeumont Schneider DC current choppers is still in service, but they were built in the 70s so who knows how much time they have left
3 дня назад+4
One of the reasons it does notes is that the fundamental inverter frequency and its harmonics have jump in order to avoid getting into the frequency bands of the audio frequency track circuits.
Montreal Metro MR73 -- have Inverter sound too (3 notes). The sound have become so popular that it is use (Replicated) to indicate that the door will close... Then, when the train start (The inverter this time). The most recent Metro units don't make noise anymore.
Thanks for the video. I did had an privilige to travel with that singing train when I visited in Japan. Please also check Helsinki metro M100 series. It is the worlds first VVVF train designed and came into to service in late 70's. It is still in use! I went to school with it in the 80's and later to work with it.
We had two indoor 100 HP HVAC fans that we installed VFD'S on back in early 1980's and depending on the speed you could hear the odd sound produced by drives several hundred feet away. Place that I retired from had over 500 VFD'S and being they were on drives that used IGBT'S with up to 5,000 Hertz switching frequency only receivers rattling sound on a few of them.
Here in Portugal we have fairly recent trains that make a similar noise, IF i'm not mistaken they are made by Siemens-Bombardier however is well muffled and is hard to tell if it the same type of frequencies.
When I first heard a video of that train I was like this is the coolest thing Ive seen (or should I say heard)...safe to say whoever the engineers were, they were also musicians! Also side note you can kinda tell the technology is older cause there are so many "steps" in the acceleration/deceleration even after the singing part...one of the more modern versions of this idea, the NYC R160B with Siemens IGBT has smoother sounding acceleration (but it also has only a single 400Hz "note" in the low speed area so I totally get it if you don't think it's as cool) Im not sure if this is just me but the acceleration on the R160B makes it sound a lot faster than it is
The reason for the variable switching frequency is that there is a MINIMUM ON TIME. Another example would be the czechoslovakian class 363 locomotives that had three distinctive switching frequencies 33,1/3Hz 100 and 300Hz. Due to the fact that the thyristors needed forced commutation trough a commutation reactor and cappacitor, they were limited to a minimum turn on time in which they will get a consistent firing of the main thyristor (After firing would stay conductive until the commutation tyhristor takes over to shut the main thyristor) This had one problem. With a fixed Ton you would have a minimum Duty cycle far too large for reasonable starting of the train. Basically the loco would instatnly start to slip and rip off the connection between the cars.. What they they did is that they decreased the switching frequency only for small powers so after reaching a certain time threshold the inverter switched to a different frequency allowind for a much better distributed current draw. After all you need a smaller inductor for a 300Hz pulsed DC to smooth out, than if you had 33Hz pulsed DC The class 363 is an early 1980s design locomotive, incorporating PWM regulation of DC traction motors. The switching was done with thyristors (the OG ones not these newfangled funny GTOs :D ) so they needed to get creative. Minimum reliable Ton (that would guarantee main thyristor conduction) was 0.3ms. This on time at 300Hz would result in a 9% duty cycle right from the starts...that wont do! So what they have done is go trough 3 frequencies. 33 1/3, 100 and 300 Duty cycle as follows 33 1/3 from 0.9% to 3% 100Hz from 3% to 9% 300Hz from 9% to 90% This allowed for a reasonable efficient controlling of voltage, and during the riding stage the use of a 300Hz frequency allowed for a smaller filter inductance to smoothen the current out and consequenty so that the torque is constant instead of being pulsed at 33Hz (funnily the whole thing rattles at this frequency during a run up) incase of the N1000, asynchronous motors are asynchronous. They modulate the low frequency sinewave into the pulse width. Change of frequency changes the RPM. But asynchronous motors have a voltage over frequency curve. The higher the frequency the higher the voltage, demanding a larger PWM swing. So for full on 50Hz lets say, you need full modulation from 0% to 100% dutycycle. But for 5Hz you need 0% to 10% and this might prove problematic due to the minimum on time of the thyristors. So the simplest solution is to change the frequency of the modulated pulses. Any time you can afford to make the frequency higher you should do it as it increases smoothness of operation and homogenises current flow into the motor windings. I hope this rather technical essay helped clear things why they make this sound..
14 часов назад
Thats a frickin gearbox for electric motors. Dope af 14:44
Modern IGBT-Inverters are fully computerised and can play any monotonic tune. The ÖBB Taurus sometimes even plays the austrian national anthem and the german ICE 3 can play the german national anthem in service mode. The only reason why there aren't more trains playing sounds is because adding fun features is not "formal" enough.
The Sawtooh PWM cycle is meant to limit inrush current and shake off friction. It just so happens that is makes the do ray me sound. it was the best way to utilize the technology they had at the time.
Here in the east of Germany we have now electric trains which are making exactly this sound if they start driving. For us this devices are totally new and Japan have stop working with this, because they have newer motors. Impressive.
No the engineers didn’t program it to make those notes, it’s simply a result of the throttle control having speed detents! As the driver accelerates through the increasing throttle positions, the motor controller increases the AC frequency, leading to that characteristic tonal melody
3 дня назад+2
As an engineer and music lover, I assure you that the frequencies were not chosen coincidentally 😂
UK trains make a lower frequency sound and the step ups is much slower between each one like it is changing gears. I thought the trains noise was gears but about 9 of them. :)
You just haven't ridden in the Ема-502 ... In Japan, trains run for 15-20 years ... meanwhile in Kiev Kharkov and St. Petersburg trains run for 50-60 years xD Waiting to make a rheostat controller for a DC colector motor ))
I would say the steps are to keep the power input constant during starting, as the power needs of the motor change because of the need for increased slip during the initial power application, and the steps are there to reduce the CPU need for a smooth sweep, as the original designs used lower speed processors, so offloading most of the power control into discrete power steps was needed, so as to not cause excess slip in the motor and thus poor accelleration, and too fast a ramp would result in a motor stalling. thus the constant steps, so that a driver could keep a constant pull away and not run the risk of a stall, which would mean a stop and a slower ramp up again, and a possibility of the motor generating an overcurrent or tacho feedback error. remember this was originally running likely on aZ80 or similar processor, with large parts being done by other processors as well, and the designers had both limited memory and limited performance. 400Hz was running the GTO devices at the high end of the range, as they, for power devices at the time, needed 2 or more same size power switches for each of the 6 legs of the drive, and GTO devices need you to have a very beefy current source and sink, as you need to turn it on fast, so high current at a relatively low voltage of around 5V on the gate, and turn off you need a current about what the device is conducting, and around -10V, to pull the gate off hard and fast enough to switch off. At least this was better than earlier thyristors, where turn off was done using LCR circuits, and a second equally rated thyristor to pull the anode negative for long enough that the first one would be able to turn off, and then the second one, due to the high power resistor providing it with power, would stay on till the first fired again to turn it off. High static current, high power loss, the GTO made this power use so much lower, at the expense of needing 4 isolated relatively high power supplies, 3 for the upper bridge, and the lower one having a common cathode connection. Instead of 500W of power dissipation now down to under 100W at idle. Add this up per axle and the power use becomes considerable, plus higher frequency, and the ability to do regenerative braking with much less processing power, and you can see why they, and now the IGBT, won out.
Nice! I live in Austria and I'm used to the sound of the "Taurus" locomotives which is similar, though if I recall correctly, the musically sounding sequence is shorter than in the trains you showed.
I worked at a place that had old 1989 inverters powering 100HP electric motors and its slow startup sounded like a car accelerating in pole position Atari game.
You can probably undervolt the fan for the best effect. I was surprised to find that the fans in my PC are almost as loud as your industrial fan when set to full power in BIOS. But I have them set to "silent" setting, I also changed control method from PWM to DC, because already rectified PWM provided to fans make them run quieter. Providing PWM semi-square wave directly to the fans make them make nasty sounds.
The reason for this sound should be something about magnetic field and efficiency at extremely low RPM. Nissan Leaf has stall protection, that if motor is hardly turning it will not use regular high frequency swithcing and will downgrade for lower one, more heard, but more efficient and less heat output at low rpm.
It doesn't seem japan specific. Here in germany we have Siemens Vectron locomotives for our public transport. They make similar sounds when starting. Or the city train in berlin as well. It seems usual today. I miss the days when tram motors made only a brutal "hummmmm" when starting. You heard and felt the violence of those older motors back in the 80s and 90s. The lights of the tram were dimming while accelerating.
I would like more in depht explanation of circuit, with schematic. Just 2 to 5 minutes. For example, this is PWM generator, this is mosfet driver etc. With wave forms explained.
I've seen an elastomer used as heatsink compound. It was white and had a silicon texture. Can the stator not be vacuum molded with this compound instead of epoxy, or just being wrapped with twine? Wouldn't that make the motor almost silent?
The reason the motor steps through pitch is because the controller sends different higher frequencies to start the motor spinning. Think of it like PWM. If you went full send the motor would burn out due to stall torque/rotor failure.
In here trains sing as well but not so nicely :D in other hand its pretty loud and i can hear it in my house when i have opened winodows and that about 1Km
The engineers choosing sounds that are musical notes is an elegant touch. Thank you both for the video and the translation.
Those were added only as a deliberate easter egg. On some models it was removed later in a firmware update, unfortunately.
@@Stoney3KI can imagine it caused massive performance issues and they wanted to improve efficiency. There's lots of lost energy to produce this
A very good example for a do re mi fa inverter is the Siemens "TAURUS" train used by the Austrian ÖBB train company
They are also used in Hungary by the Hungarian State Railways (MÁV) and Raaberbahn (GySEV) They are mostly called music boxes around the country.
We have the same power train in the metro of Buenos Aires @@zsomborhun8105
The sequence is slightly off key and this drives me crazy! Or am I musically deaf?
Here in Sao Paulo, Brazil, there where some Siemens 3000 trains with do re mi fa inverters too. I remember being very intriged with that noise
@@zsomborhun8105 the Czech Train Service uses it too, although they are owned by the ÖBB so its obvious
If I had to guess I would say the engineers had this as an audible troubleshooting tool. You can hear if and when your inverters were acting up without any extra tools. This would also be useful for the driver/conductor or other people in the loop as they could inform someone that some specific train wasn't singing correctly
When I was a kid, I connected a small DC motor to the speaker terminals on a radio and made a very inefficient speaker. If I touched the drive shaft to a surface, I could hear the radio. It worked quite well touching a glass window.
Same 😅
@@eljaibas16 I did it with an MWO transformer, to get electrocuted with the rhythm of the music. It was fun until it got truly scary when I cranked volume too high up and heavy beats came from the music (it was on a somewhat powerful home stereo amp). *Seriously dangerous, do not try it.* But, the transformer was also audibly singing indeed!
Siemens still do this,in their IC trains
you can somewhat even hear it in things like the siemens charger locomotives that via rail uses. Its very subtle though
Our subway trains still use 400 Hz for something. I love this sound especially when two sources form a binaural wave. It reminds me old good days...
haha the green ones with white lines. I think the English translation of the way they are called is "number trains" idk. 81-717/714 type. I have not heard the new ones make the same sound. At least in Moscow.
Lots of people think EVs have no soul. This can definitely bring some soul back to the drivetrain!
can you imagine what a traffic jam would sound like? It would be a cacophonic nightmare.
exactly what I was thinking..
The soul of the car is the sound of combustion, the vibrations and the control you have. EV's have no soul, no matter how much they try those fake sounds.
Rimac might have a decent sound that gives it a soul, but will never replace the sound of combustion nor is it as much as exciting
As a developer for multi megawatt inverters that have wide range of different sounds between 1...10 kHz, iam always disapointed from the sound of my EV.
In Central EU there are trains that still uses theese. Freight trains, like Siemens Taurus, ect. When an OBB Taurus is departing from our local station, I allways stop, and listen to it, it is so god damn good...
this reminds me of jubilee line, I've always loved the way it sounded, sounds like a car changing gears..
if I was designing an electric sports car i'd definately consider integrating a similar system instead of those fake speaker pumped noises we see nowadays
When braking, energy is returned to the inverter capacitor. Which can explode. Therefore, for safety, this energy must be dissipated using a brake chopper or returned to the electrical network.
Modern inverter are better in making real sine waves therefore they make less noise and are more efficient. A low power equivalent are stepper motor drivers. Some people played songs on printer or even floppy drives with that.
Modern brushless motor controllers very much still play audible sounds on startup or failure.
@@AttilaAsztalosYes, however those are intentional, and done without moving the motor shaft. During actual operation, the brushless motors don't actually make much sound.
Here in São Paulo, Brazil, we had a train that problably used this motor because the sound is very similar. I always loved this sound!
Whats is the class? Is it a CPTM Or Sao Paulo Metro
CPTM TUE series 3000 GTO based inverters @@biancadarosa9053
for the 100th anniversary of the ÖBB (Österreichischhe Bundesbahn - Austrias train company), they controlled the inverters of some trains, so that the trains played Happy Birthday
need to see that footage, any link or maybe some seach keywords?
@@WilTK4 i think, I saw it on Twitter from the account of an train driver.
4:55 I think that engineer just needed to deal with switching frequency in audible spectrum..so they decided to tune it, instead of let it annoyingly whine...
Every possible permutation of singing train is used here in the UK, it's great! 😂
I even remember the old resistor bank DC controllers with their clickity clack.
My friend, the SIEMENS Eurosprint "TAURUS" locomotives use a doremifa inverter and are still in operation in Germany and Austria.
Yup, seen them in Hungary too.
And Norway.
actually, the reason for the switching frequency change even though it is an induction motor is to control the losses during startup and very high slip conditions
It took a moment to realize that the name of the inverter comes from the “do re me fa so la ti do” tool for teaching music.
This is probably the most geeky video that I watched in a while and I love it!
Since Poland is like two decades behind on train tech we go them like few years ago. I like how they sound.
While most people would consider it noise compared to this, the electric motors in my local metro have a very distinct sound, even after they changed the old trains with the new ones... It just gets into your brain.
I would have loved it if you showed the code to make the various sounds...
The "Singing Trains" of Montreal Canada were so iconic, that the residents of the city voted to make the sound they made, the new chimes that play when the doors are closing. Even though the vast majority likely had no clue what caused the sounds
One model of train in Montreal using the old Jeumont Schneider DC current choppers is still in service, but they were built in the 70s so who knows how much time they have left
One of the reasons it does notes is that the fundamental inverter frequency and its harmonics have jump in order to avoid getting into the frequency bands of the audio frequency track circuits.
Montreal Metro MR73 -- have Inverter sound too (3 notes). The sound have become so popular that it is use (Replicated) to indicate that the door will close... Then, when the train start (The inverter this time). The most recent Metro units don't make noise anymore.
You can hear similar sound in Busan Metro Green Line (2nd line) in Korea, but it just ramps up and down like a sawtooth wave.
Thanks for the video. I did had an privilige to travel with that singing train when I visited in Japan. Please also check Helsinki metro M100 series. It is the worlds first VVVF train designed and came into to service in late 70's. It is still in use! I went to school with it in the 80's and later to work with it.
We had two indoor 100 HP HVAC fans that we installed VFD'S on back in early 1980's and depending on the speed you could hear the odd sound produced by drives several hundred feet away. Place that I retired from had over 500 VFD'S and being they were on drives that used IGBT'S with up to 5,000 Hertz switching frequency only receivers rattling sound on a few of them.
I've heard this trains in Switzerland many times. The trains that travel between Zürich HB and Viena Hbf
Here in Portugal we have fairly recent trains that make a similar noise, IF i'm not mistaken they are made by Siemens-Bombardier however is well muffled and is hard to tell if it the same type of frequencies.
When I first heard a video of that train I was like this is the coolest thing Ive seen (or should I say heard)...safe to say whoever the engineers were, they were also musicians!
Also side note you can kinda tell the technology is older cause there are so many "steps" in the acceleration/deceleration even after the singing part...one of the more modern versions of this idea, the NYC R160B with Siemens IGBT has smoother sounding acceleration (but it also has only a single 400Hz "note" in the low speed area so I totally get it if you don't think it's as cool)
Im not sure if this is just me but the acceleration on the R160B makes it sound a lot faster than it is
Here I was thinking there was some kind of transmission making that noise. How wrong I was. Fascinating!
That is very silly and I love it. I wish the T had trains like that when I was taking the trains in and out of Boston.
The reason for the variable switching frequency is that there is a MINIMUM ON TIME.
Another example would be the czechoslovakian class 363 locomotives that had three distinctive switching frequencies 33,1/3Hz 100 and 300Hz. Due to the fact that the thyristors needed forced commutation trough a commutation reactor and cappacitor, they were limited to a minimum turn on time in which they will get a consistent firing of the main thyristor (After firing would stay conductive until the commutation tyhristor takes over to shut the main thyristor)
This had one problem. With a fixed Ton you would have a minimum Duty cycle far too large for reasonable starting of the train. Basically the loco would instatnly start to slip and rip off the connection between the cars.. What they they did is that they decreased the switching frequency only for small powers so after reaching a certain time threshold the inverter switched to a different frequency allowind for a much better distributed current draw. After all you need a smaller inductor for a 300Hz pulsed DC to smooth out, than if you had 33Hz pulsed DC
The class 363 is an early 1980s design locomotive, incorporating PWM regulation of DC traction motors. The switching was done with thyristors (the OG ones not these newfangled funny GTOs :D ) so they needed to get creative.
Minimum reliable Ton (that would guarantee main thyristor conduction) was 0.3ms. This on time at 300Hz would result in a 9% duty cycle right from the starts...that wont do!
So what they have done is go trough 3 frequencies. 33 1/3, 100 and 300
Duty cycle as follows
33 1/3 from 0.9% to 3%
100Hz from 3% to 9%
300Hz from 9% to 90%
This allowed for a reasonable efficient controlling of voltage, and during the riding stage the use of a 300Hz frequency allowed for a smaller filter inductance to smoothen the current out and consequenty so that the torque is constant instead of being pulsed at 33Hz (funnily the whole thing rattles at this frequency during a run up)
incase of the N1000, asynchronous motors are asynchronous. They modulate the low frequency sinewave into the pulse width. Change of frequency changes the RPM. But asynchronous motors have a voltage over frequency curve. The higher the frequency the higher the voltage, demanding a larger PWM swing. So for full on 50Hz lets say, you need full modulation from 0% to 100% dutycycle. But for 5Hz you need 0% to 10% and this might prove problematic due to the minimum on time of the thyristors. So the simplest solution is to change the frequency of the modulated pulses. Any time you can afford to make the frequency higher you should do it as it increases smoothness of operation and homogenises current flow into the motor windings.
I hope this rather technical essay helped clear things why they make this sound..
Thats a frickin gearbox for electric motors. Dope af 14:44
I was always curious about the sounds that TAURUS locomotives make, now I understand.
Thanks for the time dedicated to the experiment.
Modern IGBT-Inverters are fully computerised and can play any monotonic tune. The ÖBB Taurus sometimes even plays the austrian national anthem and the german ICE 3 can play the german national anthem in service mode. The only reason why there aren't more trains playing sounds is because adding fun features is not "formal" enough.
The Sawtooh PWM cycle is meant to limit inrush current and shake off friction. It just so happens that is makes the do ray me sound. it was the best way to utilize the technology they had at the time.
This is nuts! Reminds me so much how our RC planes works!
Yep very similar except with permanent magnet motors rather than induction motors
I didn't know this was a thing in RC planes.
Here in the east of Germany we have now electric trains which are making exactly this sound if they start driving. For us this devices are totally new and Japan have stop working with this, because they have newer motors. Impressive.
No the engineers didn’t program it to make those notes, it’s simply a result of the throttle control having speed detents! As the driver accelerates through the increasing throttle positions, the motor controller increases the AC frequency, leading to that characteristic tonal melody
As an engineer and music lover, I assure you that the frequencies were not chosen coincidentally 😂
It’s so interesting how the motor makes sound on each gear.
Thank you! Unfortunately, I haven't been to Japan but I know the Austrian Taurus train and I'm fond of its sound.
UK trains make a lower frequency sound and the step ups is much slower between each one like it is changing gears. I thought the trains noise was gears but about 9 of them. :)
You just haven't ridden in the Ема-502 ...
In Japan, trains run for 15-20 years ... meanwhile in Kiev Kharkov and St. Petersburg trains run for 50-60 years xD
Waiting to make a rheostat controller for a DC colector motor ))
I would say the steps are to keep the power input constant during starting, as the power needs of the motor change because of the need for increased slip during the initial power application, and the steps are there to reduce the CPU need for a smooth sweep, as the original designs used lower speed processors, so offloading most of the power control into discrete power steps was needed, so as to not cause excess slip in the motor and thus poor accelleration, and too fast a ramp would result in a motor stalling. thus the constant steps, so that a driver could keep a constant pull away and not run the risk of a stall, which would mean a stop and a slower ramp up again, and a possibility of the motor generating an overcurrent or tacho feedback error. remember this was originally running likely on aZ80 or similar processor, with large parts being done by other processors as well, and the designers had both limited memory and limited performance.
400Hz was running the GTO devices at the high end of the range, as they, for power devices at the time, needed 2 or more same size power switches for each of the 6 legs of the drive, and GTO devices need you to have a very beefy current source and sink, as you need to turn it on fast, so high current at a relatively low voltage of around 5V on the gate, and turn off you need a current about what the device is conducting, and around -10V, to pull the gate off hard and fast enough to switch off. At least this was better than earlier thyristors, where turn off was done using LCR circuits, and a second equally rated thyristor to pull the anode negative for long enough that the first one would be able to turn off, and then the second one, due to the high power resistor providing it with power, would stay on till the first fired again to turn it off. High static current, high power loss, the GTO made this power use so much lower, at the expense of needing 4 isolated relatively high power supplies, 3 for the upper bridge, and the lower one having a common cathode connection. Instead of 500W of power dissipation now down to under 100W at idle. Add this up per axle and the power use becomes considerable, plus higher frequency, and the ability to do regenerative braking with much less processing power, and you can see why they, and now the IGBT, won out.
Nice! I live in Austria and I'm used to the sound of the "Taurus" locomotives which is similar, though if I recall correctly, the musically sounding sequence is shorter than in the trains you showed.
Japan is Master of all things Trains, from small scale train sets to full scale national transportation.
Not gonna lie it took me 3 minutes to realize the lips don't match the words. 10/10 translation
Thank you for the video! Greetings from 1520 rail gauge in Russia
very impressive and dedicated hard work thank you.....🥰🥰😍😍😍🥰🥰🥰
I worked at a place that had old 1989 inverters powering 100HP electric motors and its slow startup sounded like a car accelerating in pole position Atari game.
It could've been meant as a soft start for the engines, either to prevent wear or to prevent load on the electrical network.
Wonderful video, wonderful channel, awesome youtuber... :)
Now built this type inverter for an old drill. Because my old drill would also make funny sounds like this. Until the nicd batteries died
You can probably undervolt the fan for the best effect. I was surprised to find that the fans in my PC are almost as loud as your industrial fan when set to full power in BIOS. But I have them set to "silent" setting, I also changed control method from PWM to DC, because already rectified PWM provided to fans make them run quieter. Providing PWM semi-square wave directly to the fans make them make nasty sounds.
Excelente trabajo 👍🏻
Saludos cordiales desde Argentina 🇦🇷
Here in EU there are 1000s of lokomotive with this sound. Like the Taurus lokomotive from Austria
The reason for this sound should be something about magnetic field and efficiency at extremely low RPM. Nissan Leaf has stall protection, that if motor is hardly turning it will not use regular high frequency swithcing and will downgrade for lower one, more heard, but more efficient and less heat output at low rpm.
You guys should listen to former Czechoslovakian locomotives 363 or 163, running standard thyristors at 33 1/3, 100 and 300Hz, that is a sound! :)
It doesn't seem japan specific.
Here in germany we have Siemens Vectron locomotives for our public transport.
They make similar sounds when starting.
Or the city train in berlin as well. It seems usual today.
I miss the days when tram motors made only a brutal "hummmmm" when starting.
You heard and felt the violence of those older motors back in the 80s and 90s.
The lights of the tram were dimming while accelerating.
A cordless, brushless drill motor does practically exactly the same.
It sounds like it is changing gears.
I am assuming that this is all accomplished via pulse width modulation.
Well done sir.
I would like more in depht explanation of circuit, with schematic. Just 2 to 5 minutes. For example, this is PWM generator, this is mosfet driver etc. With wave forms explained.
Awesome video 👌👌
Great. It should switch to a minor scale when the train is delayed
Thanks ❤
Montreal Metro still uses these!
1:42 ElectroBOOM from Japan be like lmao
Is the low switching frequency at start up and the (stepped) increase part of getting a bit more torque at the Los speeds?
If memory serves correct, this is all to manipulate the AC frequency to match the rotational speed for the best efficiency isn't it?
It's all explained in "How electric trains work and why they make interesting sounds"
12:05 It sounds like overclocking a car
I've seen an elastomer used as heatsink compound.
It was white and had a silicon texture.
Can the stator not be vacuum molded with this compound instead of epoxy, or just being wrapped with twine?
Wouldn't that make the motor almost silent?
Did I miss if he attached an important ground wire to the motor & IGBT enclosure. Our safety department would write us up for missing ground wires.
you make me think Doremifa is the brand name😂
It took me forever to realize that the name of the inverter is Do Re Mi Fa... after the notes.
Heard this in Densha de d - Out of Sight.
please feature more interesting electronics
I saw music in motor alot usually in drone bldc motor with escs like beep ,beep ,beep , beeep
How did you make it sound like it was switching through gears when speeding up? That is more interesting than the ringing speeds..
Change in the carrier signal frequency causes those gearing sounds. I believe it is usually optimized for specific motors and VFDs.
It's 2 am and I'm watching a video about japanese trains (I've never been there)
you shoul come to our subway stations M5 in Milan. The sound of our subway trains is different
Did you run the fan on 115 or 230 volt?
Touch 1500VDC want you will release magic smoke and stop working like a transistor that had released the magic smoke.
is there a tentacle inverter
Maywa Denki would like a word with you :p
1500V? The overhead lines on HS1 are 25kV
What is the type of the disassembled motor on your table?
Looks like a Nissan leaf motor
There's some disagreement between musicians about what frequencies certain notes should be, especially the A and B notes
The reason the motor steps through pitch is because the controller sends different higher frequencies to start the motor spinning. Think of it like PWM. If you went full send the motor would burn out due to stall torque/rotor failure.
do you have a japanese voiced channel? with your original voice
In here trains sing as well but not so nicely :D in other hand its pretty loud and i can hear it in my house when i have opened winodows and that about 1Km
Hi Denki! Connect by MIDI controller e play some musics
now the train cars make sounds of tentacle grape
the regio panther has the same thing
respekt
The principle is the same as the loudspeaker and the buzzer
Hello what is name of switch
hello, i would love to do this as a college project, can you give me some schematics or something ?
Envíanos un diagrama del circuito de potencia