Title:
READHESION CONTROLLER FOR ELECTRIC RAILCAR
Document Type and Number:
Japanese Patent JP3246075
Kind Code:
B
Abstract:
PURPOSE: To reduce a service delay and to improve riding comfort by suppressing a decrease in acceleration, deceleration performance due to slip or glide of an electric railcar to a minimum limit.
CONSTITUTION: A minimum frequency of a rotating frequency of a motor 2 to be detected through a pulse generator 3 and a speed calculator 4 by a reference frequency selector 7 is selected at the time of power drive and a maximum frequency is selected as the reference frequency at the time of braking, and a difference between the reference frequency and the rotary frequency of the motor 2 is obtained by a subtracter 8. On the other hand, a time change rate of the rotary frequency of the motor 2 is obtained by a change rate calculator 10, and predetermined outputs responsive to outputs of the subtracter 8 and the calculator 10 are obtained by a functional generator 9, and at least one of the current and the frequency command to the motor 2 is reduced and controlled.
Inventors:
Iwabori, Michio
Yuya, Kosuke
Hoshino, Hideo
Yuya, Kosuke
Hoshino, Hideo
Application Number:
JP1993000122303
Publication Date:
November 02, 2001
Filing Date:
May 25, 1993
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
International Classes:
B60L9/16; H02P5/50; B60L9/00; H02P5/46; (IPC1-7): B60L9/16; H02P5/50