Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR DEGAUSSING AND INITIALIZING ELECTROMAGNET
Document Type and Number:
Japanese Patent JPH05198394
Kind Code:
A
Abstract:

PURPOSE: To prevent the turbulence in a magnetic field after degaussing and initializing an electromagnet by degaussing and initializing an electromagnet having a small exciting quantity after degaussing and initializing an electromagnet having a large exciting quantity.

CONSTITUTION: A central processing unit 21 receives a degaussing and initializing command and outputs a start command signal to a ring deflecting quadrupole electromagnet power source control unit 24. The unit 24 sets a ring deflecting quadrupole electromagnet power source 25 ON according to the signal to supply a current to an electromagnet on the basis of the current pattern stored in a pattern memory 26. When the degaussing and initializing are ended, the unit 24 transmits an end state signal to the unit 21. Then, the unit 21 outputs the start command signal to a corrected electromagnet power source control unit 28 to supply the current based on the current pattern of a set pattern memory 30 to the corrected electromagnet. Thus, electromagnets are extinguished/initialized separately according to the magnitude of exciting quantity, whereby the turbulence in the magnetic field of electromagnets is prevented after the degaussing and initializing.


Inventors:
Takahashi, Mitsusachi
Application Number:
JP1991000337307
Publication Date:
August 06, 1993
Filing Date:
December 19, 1991
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
ISHIKAWAJIMA HARIMA HEAVY IND CO LTD
International Classes:
H01F13/00; H05H7/04; (IPC1-7): H01F13/00; H05H7/04



 
Previous Patent: JPS5198393

Next Patent: ELECTROMAGNET POLARITY SWITCHING DEVICE