The motors shown in previouse vidoes had a more simplistic voltage waveform at higher speeds due to reduced frequnecy modulation. This results in a more disorted current waveform which produces torque ripple and vibrations in the motor. Perfect sinoisoids are the best waveform for a motor because it is the graph generated by circular motion.
The sawtooth wave is the AC line frequency not the carrier wave because the sawtooth represents the AC line phase angle. The phase angle is typically measured via a phase locked loop. A carrier wave is a triangle wave not sawtooth and is typically several times higher than the AC line frequency. This is because the carrier wave is used to generate the PWM switching and is thus equal to the switching frequency. In an electrical motor the rotating magnetic field (RMF) speed is locked to the AC line frequency. The RMF is only faster than the rotor speed in trains equipped with asynchronous induction motors due to motor slip. Hence the term "asynchronous". During regenerative breaking the RMF is slower then the rotor resulting in negative slip. Trains equipped with synchronous motors such as permanent magnets have the same rotor and RMF due to the rotor being magnetically locked with the RMF hence the term "synchronous".
関西では聞かない、宇宙船の音
The motors shown in previouse vidoes had a more simplistic voltage waveform at higher speeds due to reduced frequnecy modulation. This results in a more disorted current waveform which produces torque ripple and vibrations in the motor. Perfect sinoisoids are the best waveform for a motor because it is the graph generated by circular motion.
東芝だ！
235のトプナンもお願いします
キャリア周波数が実車より低くくありません???
間違っているかもしれませんが、おそらくこの動画で再現されているのは
トウ01の東芝ハイブリッドSicです
東芝は三菱に比べて低い音ですので音的に東芝だと考えられます
おそらくそうですねトウ1は、試験製造なのでほかとは、違います
The sawtooth wave is the AC line frequency not the carrier wave because the sawtooth represents the AC line phase angle. The phase angle is typically measured via a phase locked loop. A carrier wave is a triangle wave not sawtooth and is typically several times higher than the AC line frequency. This is because the carrier wave is used to generate the PWM switching and is thus equal to the switching frequency.
In an electrical motor the rotating magnetic field (RMF) speed is locked to the AC line frequency. The RMF is only faster than the rotor speed in trains equipped with asynchronous induction motors due to motor slip. Hence the term "asynchronous". During regenerative breaking the RMF is slower then the rotor resulting in negative slip. Trains equipped with synchronous motors such as permanent magnets have the same rotor and RMF due to the rotor being magnetically locked with the RMF hence the term "synchronous".
e501系、e129系お願いします