Title:
CUT-OFF CURRENT VALUE COMMAND APPARATUS
Document Type and Number:
Japanese Patent JPS63202205
Kind Code:
A
Abstract:
PURPOSE:To obtain the maximum permissible accelerating force by storing past main circuit current hysteresis and by operating and commanding the maximum cut-off current value tolerable for the apparatus at that point of time. CONSTITUTION:A main circuit current detector 1 detects a main circuit current value and sends the current value to an arithmetic and logic unit 3. Also, a clock 2 sends the present time to the arithmetic and logic unit 3. Said arithmetic and logic unit 3 stores a current value for a past given period of time and obtains a root mean square value of electric current during that period of time and RMS current by said current value. Then, said unit 3 obtains a cut-off current value to be set by said RMS current. The arithmetic and logic unit 3 sends the cut-off current value obtained by said method as a cut-off current value command to a main circuit controller 4. Then, the main circuit controller 4 sets a cut-off current on the basis of said cut-off current value command. In this manner, it is possible to obtain an accelerating force making the capabilities of a main circuit apparatus to the maximum.
Inventors:
ISHIKAWA SAKAE
FUJITA SHINICHIRO
OCHIAI OSAMU
FUJITA SHINICHIRO
OCHIAI OSAMU
Application Number:
JP3512987A
Publication Date:
August 22, 1988
Filing Date:
February 18, 1987
Export Citation:
Assignee:
RAILWAY TECHNICAL RES INST
MITSUBISHI ELECTRIC CORP
MITSUBISHI ELECTRIC CORP
International Classes:
B60L3/00; B60L15/10; (IPC1-7): B60L3/00; B60L15/10
Domestic Patent References:
| JPS5445021A | 1979-04-10 | |||
| JPS58103881A | 1983-06-21 |
Attorney, Agent or Firm:
Takada Mamoru