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Patent Searching and Data


Title:
MAGNETIC FIELD LEAKAGE CANCELING DEVICE
Document Type and Number:
Japanese Patent JPS63144505
Kind Code:
A
Abstract:

PURPOSE: To contrive prevention of damage generating on a leakage magnetic field canceling device by a method wherein a coil, with which the magnetic field to be used to cancel or adjust the leakage magnetic field, is provided on the circumference of a magnetic field generating device, and the coil is made light in weight.

CONSTITUTION: A canceling coil 7 is arranged on the circumference of a transformer such as a fly-back transformer 1, for example, and it is attached to the clamper and the like which will be provided on a heat radiating plate or a substrate 3. When a current is applied to the coil 2 of the transformer 1, a leakage magnetic field 4 which passes the outside of the transformer 1 is generated. Therefore, a magnetic field 8 is generated when a current is made to flow to the cancel coil 7, and the leakage magnetic flux 4 is cancelled or adjusted. The coil 7 becomes light in weight by using the wire material such as a copper wire and the like when compared with the case wherein a shield ring is used. Also, the final size and direction of the leakage magnetic field 4 and the magnetic field 8 can be adjusted by adjusting the number of path of the coil 7 and also by adjusting the DC current to be made to flow.


Inventors:
KOTO SHINGO
Application Number:
JP1986000291550
Publication Date:
June 16, 1988
Filing Date:
December 09, 1986
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H04N3/18; H01F27/34; H01F27/36; H01F27/38; H01F38/42; (IPC1-7): H01F19/04; H01F27/34; H04N3/18
Domestic Patent References:
JPS49125820A1974-12-02
JPS6320416B21988-04-27