| 摘要 |
<p>PURPOSE:To increase the tension force and the brake force of an electric railcar by providing a parallel circuit of impedance elements and switches in series with a power supply path of induction motor groups of odd and even number axle positions. CONSTITUTION:Electric railcars of axle drive supported at bodies by two sets of 2-axle bogie trucks are divided into induction motor groups 21, 23 group for driving dynamic wheels 11, 13 axles of odd numbers and induction motor groups 22, 24 for driving dynamic wheels 12, 14 axles of even numbers. Impedance elements 31-33 and switches 37-39, impedance elements 34-36 and switches 40- 42 connected in parallel are respectively inserted between the inverter 8 and motors 21, 23 and 22, 24. When the induction motor currents exceed a set value at electric railcar accelerating/decelerating times, switches 37-39, 40-41 are opened or closed in response to the axial movements occurred during the acceleration or deceleration.</p> |
