Title:
CONTROLLER FOR ELECTRIC ROLLING STOCK
Document Type and Number:
Japanese Patent JPS6281904
Kind Code:
A
Abstract:
PURPOSE:To conduct constant-speed operation at free speed by changing over a slip-frequency signal to a slip-frequency signal corresponding to a difference between a constant-speed command signal and a speed signal when a constant- speed operation command is transmitted. CONSTITUTION:A fS pattern generator 7 and an IM pattern generator 8 each output a slip frequency pattern fSP1 and a motor current command IMP1 corresponding to the positions of notches for a master controller 6. A fS correction signal fSP corresponding to a difference between a motor current command IMP and a motor current IM and the slip frequency pattern fSP1 are added, and a slip frequency command fS is outputted. When the master controller 6 is closed to a constant-speed operation position, changeover switches 9 and 10 are changed over, and a slip frequency signal fSP2 corresponding to a difference between a speed command signal fP and a speed signal fr and a current command signal IMP2 are outputted.
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Inventors:
MIZOBUCHI TETSUYA
OZAWA TSUTOMU
OZAWA TSUTOMU
Application Number:
JP22012485A
Publication Date:
April 15, 1987
Filing Date:
October 04, 1985
Export Citation:
Assignee:
HITACHI LTD
International Classes:
B60L9/18; B60L9/22; B60L15/28; H02P27/06; (IPC1-7): B60L9/18
Domestic Patent References:
| JPS6013403A | 1985-01-23 | |||
| JPS57145506A | 1982-09-08 |
Attorney, Agent or Firm:
Katsuo Ogawa
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