Title:
CONTROLLER FOR ELECTRIC ROLLING STOCK
Document Type and Number:
Japanese Patent JPH0199403
Kind Code:
A
Abstract:
PURPOSE:To enhance controllability, by lowering filter capacitor voltage by a specified quantity at the time of weak brake force controlling, and by fixing reference slip frequency to a limit value. CONSTITUTION:At the time of weak brake command, the output of a brake force command discriminator 29 comes to H. When reference slip frequency Fs' computed by a reference slip frequency arithmetic unit 26 comes to a limit value from a frequency setting unit 30, or less, then the output of a comparator 31 comes to H. When the two conditions are satisfied with, then by a logical circuit 28, switches 33, 34 and 36 are changed over. By the change-over of the switch 34, the output of a weak brake time control phase angle arithmetic unit 5 comes to a converter control phase angle command value phic', and the filter capacitor voltage is lowered. Besides, by changing the switch 33 over, the output is switched to the reference slip frequency Fs' from the reference slip frequency arithmetic unit 26, and the output of the limit value from the frequency setting unit 30 is generated.
Inventors:
YAMAMOTO SHIROJI
Application Number:
JP25373187A
Publication Date:
April 18, 1989
Filing Date:
October 09, 1987
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
B60L7/14; B60L9/24; (IPC1-7): B60L7/14; B60L9/24
Attorney, Agent or Firm:
Noriyuki Noriyuki (1 person outside)
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