Core

• US 20030020588A1
• Filed: 06/26/2002
• Published: 01/30/2003
• Est. Priority Date: 03/27/1998
• Status: Active Grant

• Current Assignee: Furukawa Electric Company Limited
• Original Assignee: Furukawa Electric Company Limited
• Inventors: Jin, Dongzhi, Abe, Fumihiko, Yonehara, Hideharu, Mochizuki, Hajime
• Granted Patent: US 7,106,163 B2
• Time in Patent Office: Days
• US Class Current: 336/233
• CPC Class Codes: H01F 1/26 by macromolecular organic substances
• CPC Class Codes: H01F 2019/085 Transformer for galvanic isolation
• CPC Class Codes: H01F 27/255 made from particles H01F27/26 takes precedence
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10

Abstract

An isolation transformer core having a coil and a core member made by injection molding a mixture containing 10 to 50±3 volume % of a soft magnetic material and the remainder being an insulating material having an electrical insulating property.

Claims

1. In an isolation transformer core comprising a coil and an injection molded core member, the improvement comprising:

said core member made by injection molding a mixture containing 10 to 50±

3 volume % of a soft magnetic material and the remainder being an insulating material having an electrical insulating property.

2. An isolation transformer core according to claim 1, wherein said soft magnetic material is soft magnetic ferrite or Sendust.

3. An isolation transformer core according to claim 1, wherein said insulating material is any one of thermoplastic resin, thermoplastic rubber and thermosetting resin.

4. An isolation transformer core according to claim 2, wherein said insulating material is any one of thermoplastic resin, thermoplastic rubber and thermosetting resin.

5. An automotive component, comprising:

a core comprising an injection molded core member,

wherein said core member is made by injection molding a mixture containing 10 to 50±

3 volume % of a soft magnetic material and the remainder being an insulating material having an electrical insulating property.

6. An automotive component according to claim 5, wherein said soft magnetic material is soft magnetic ferrite or Sendust.

7. An automotive component according to claim 5, wherein said insulating material is any one of thermoplastic resin, thermoplastic rubber and thermosetting resin.

8. An automotive component according to claim 6, wherein said insulating material is any one of thermoplastic resin, thermoplastic rubber and thermosetting resin.

9. A rotation sensor for detecting an angle of relative rotation of first and second rotors that are rotatable relative to each other, comprising:

a first rotor comprising an injection molded core member and mounted to a predetermined axial position of the first shaft;

a stationary core fixed to a fixing member and having a core body and an excitation coil, said excitation coil carrying an AC current and cooperating with the core member of the first rotor to form a magnetic circuit; and

a second rotor mounted to the second shaft and arranged between the first rotor and the stationary core,

wherein said core member is made by injection molding a mixture containing 10 to 50±

3 volume % of a soft magnetic material and the remainder being an insulating material having an electrical insulating property.

10. An automotive component comprising:

a core comprising a coil and an injection molded core member;

wherein said core member is made by injection molding a mixture containing 10 to 50±

3 volume % of a soft magnetic material and the remainder being an insulating material having an electrical insulating property.

11. An automotive component according to claim 10, wherein said soft magnetic material is soft magnetic ferrite or Sendust.

12. An automotive component according to claim 10, wherein said insulating material is any one of thermoplastic resin, thermoplastic rubber and thermosetting resin.

13. An automotive component according to claim 11, wherein said insulating material is any one of thermoplastic resin, thermoplastic rubber and thermosetting resin.