Booster transformer for driving magnetron and transformer unit having the booster tranformer

• US 20070103952A1
• Filed: 04/14/2004
• Published: 05/10/2007
• Est. Priority Date: 04/15/2003
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Morikawa, Hisashi, Sakai, Shinichi, Suenaga, Haruo, Yasui, Kenji, Satou, Keiichi
• Granted Patent: US 7,535,331 B2
• Time in Patent Office: Days
• US Class Current: 363/171
• CPC Class Codes: H01F 2038/003 High frequency transformer for microwave oven
• CPC Class Codes: H01F 27/323 Insulation between winding turns, between winding layers
• CPC Class Codes: H01F 27/325 Coil bobbins formers for coils in general H01F5/02
• CPC Class Codes: H01F 30/04 having two or more secondary windings, each supplying a separate load, e.g. for radio set power supplies
• CPC Class Codes: H05B 6/662 Aspects related to the boost transformer of the microwave heating apparatus

Abstract

A booster transformer 100 for driving a magnetron includes a bobbin 11 on which at least a first winding 13 and a secondary winding 15 are wound and a core 19 inserted through the center of the bobbin 11, wherein a winding area of the secondary winding 15 is divided into two areas while interposing a partition wall 23, and an outer diameter d of a wire material of the secondary winding 15 and a width t1 of each of the divided winding areas are so set as to satisfy the relation t1<11d.

Claims

1. A booster transformer for driving a magnetron, comprising:

a bobbin having a primary winding and a secondary winding wound thereon; and

a core inserted into a center of said bobbin,

wherein a winding area of said secondary winding is divided into two areas while interposing a partition wall, and an outer diameter d of a wire of said secondary winding and a width t₁ of each of the divided wiring areas are so set as to satisfy the relation t₁<

11d.

2. A booster transformer for driving a magnetron as defined in claim 1, wherein said secondary winding is wound on said bobbin while a wire material thereof is arranged under an irregular state.

3. A booster transformer for driving a magnetron as defined in claim 1, wherein a thickness t₂ of said partition wall and the width t₁ of each of said divided wiring areas are so set as to satisfy the relation 0.8t₂<

t₁.

4. A booster transformer for driving a magnetron as defined in claim 1, wherein the wire material of said secondary winding is a solid wire having an insulating coating formed around a core wire or a litz wire formed by merely twisting a plurality of said solid wires.

5. A booster transformer for driving a magnetron as defined in claim 1, wherein high-voltage components constituting a voltage doubler rectifier circuit for rectifying a high frequency high voltage from said secondary winding of said booster transformer are held integrally with said bobbin.