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Title:
SEPARATE-TYPE ROTARY TRANSFORMER
Document Type and Number:
Japanese Patent JPS61140116
Kind Code:
A
Abstract:

PURPOSE: To enable a separate-type rotary transformer to be manufactured with high precision as well as simply and with less manhours by integrating a plurality of ferrite cores with a resin, and also fixing the coils to the cores with the resin.

CONSTITUTION: Ring-shaped ferrite cores 1, 2 are previously manufactured. After coils 3, 4 are placed in the circular grooves of the cores 1, 2, this is placed in a resin molding tool, and a resin 6 is then injected, thereby manufacturing a titled device. A non-magnetic, conductive shield ring 5 is also integrated between the cores 1, 2. Since a plurality of ferrite cores are integrated with a resin, precision as a rotary transformer can be provided by making the precision of the cores, particularly the precision of the coil-mounted sides thereof sufficient. Moreover, since the coils are also made integral with the resin, manhours can be reduced if the cores are integrated and simultaneously the coils are also fixed to the cores.


Inventors:
Murakami, Toyohiko
Application Number:
JP1984000263291
Publication Date:
June 27, 1986
Filing Date:
December 13, 1984
Export Citation:
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Assignee:
NIPPON FERRITE LTD
International Classes:
H01F38/14; G11B5/02; H01F38/18; (IPC1-7): G11B5/02; H01F23/00
Domestic Patent References:
JPS5972122A



 
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