EF58はどう動く？ 運転士の指先からDC1500V主回路へ ― マスコン・リレー・空気制御の全貌 How the EF58 Really Works

Does the EF58 driver directly switch the DC 1500V main circuit using the master controller? Actually, no. Directly switching 1500V DC and high current would be extremely dangerous, as the arc would be difficult to extinguish even after releasing the contacts. The driver issues "small commands" from the master controller to operate the main circuit. The flow is as follows: Master controller → Control current → Control relay → Solenoid valve → Compressed air → Electromagnetic air unit switch → DC 1500V main circuit → MT42 traction motor x 6 This is how the enormous power is safely controlled. Furthermore, this time we will also focus on the resistance control of the EF58. At startup, a starting resistor is used to suppress the high current, and as the speed increases, the unit switches are switched sequentially to short-circuit the resistors. Furthermore, the six main motors are rearranged as follows: 6 in series → approximately 250V/motor 3 in series × 2 groups in parallel → approximately 500V/motor 2 in series × 3 groups in parallel → approximately 750V/motor The train accelerates by rearranging these configurations. Then, using actual footage of the train leaving the depot, we observe the operation of briefly moving the master controller towards the power side, returning it to "off" once the necessary force is obtained, and then coasting. We explore how the relays, solenoid valves, compressed air, unit switches, resistors, and six main motors work together within the beautifully streamlined body. This time, we follow the *"nerves" and "muscles"* of the EF58. English Summary: How did an EF58 locomotive control a 1,500V DC main circuit without bringing that dangerously high voltage directly to the driver's master controller? This video follows the complete control chain—from the driver's hand to relays, solenoid valves, compressed air, electromagnetic-pneumatic switches, starting resistors, and finally the six MT42 traction motors. 14 Hashtags #EF58 #JNR #ElectricLocomotive #ShowaEraRailways #RailwayTechnology #MasterController #DC1500V #ResistanceControl #ElectromagneticPneumaticSwitch #MT42 #RailwayExplanation #RailwayVideo #JapaneseRailways Chris Zabriskie's "I Am a Man Who Will Fight for Your Honor" is licensed under a Creative Commons 4.0 license (attribution required). https://creativecommons.org/licenses/... Source: http://chriszabriskie.com/honor/ Artist: http://chriszabriskie.com/