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Boosting transformer for driving magnetron

A technology of step-up transformer and magnetron, applied in the field of step-up transformer, can solve the problem of reducing the size of the power supply, and achieve the effects of easy assembly and reduced production cost

Inactive Publication Date: 2008-12-17
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This becomes an obstacle to the main purpose of reducing the power supply size

Method used

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  • Boosting transformer for driving magnetron
  • Boosting transformer for driving magnetron
  • Boosting transformer for driving magnetron

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no. 1 example

[0059] FIG. 2A is a front view showing a step-up transformer according to a first embodiment of the present invention. FIG. 2B is a plan view showing the step-up transformer. FIG. 2C is a side view showing the step-up transformer. And FIG. 2D is a perspective view showing the step-up transformer. In FIGS. 2A to 2D , a step-up transformer 20 according to the first embodiment of the present invention has a primary winding 21 , a secondary winding 22 and a heater coil 23 . The winding cross-sectional area of ​​the primary winding 21 is larger than the winding cross-sectional area of ​​the secondary winding 22 . The number of turns of the primary winding 21 is smaller than the number of turns of the secondary winding 22 . Since the number of turns of the heater coil 23 is extremely small compared with the number of turns of the secondary winding 22, the heater coil 23 is not shown in FIGS. 2A to 2D. Since the heater coil 23 may be formed as a separate part from the step-up tra...

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Abstract

The invention discloses a boosting transformer for microwave oven, which is low in high-frequency loss, hardly saturated, small in size and easy to produce. The boosting transformer comprises primary winding, a secondary winding, and two U-shaped ferric oxide powder resin magnetic cores, each of which comprises ferric oxide powder seal by the resin; moreover, the two U-shaped ferric oxide powder resin magnetic cores are oppositely disposed via intervals formed between U-shaped fore ends of the two U-shaped ferric oxide powder resin magnetic cores; wherein the cores are formed by two reciprocally butted corresponding straight parts of the two U-shaped ferric oxide powder resin magnetic cores, also the cores are disposed with a primary winding and a secondary winding.

Description

[0001] This application is a divisional application of the Chinese invention patent application with the application date of January 15, 2003 and the application number 03800015.6, whose invention name is "magnetron-driven step-up transformer". technical field [0002] The present invention relates to high-frequency induction heating using magnetrons in microwave ovens and the like, and in particular to step-up transformers for driving magnetrons by switching power supplies. Background technique [0003] FIG. 1 is a block diagram of a magnetron drive power source (electric source) using a step-up transformer which is the subject of the invention. In FIG. 1 , an alternating current from a commercial power supply 11 is rectified into a direct current by a rectification circuit 13 . The DC current is smoothed by a choke coil 14 and a filter capacitor 15 on the output side of the rectifier circuit 13 , and then sent to the input side of the inverter 16 . This direct current is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/24H01F1/10H05B6/64H01F30/00
Inventor 三原诚安井健治北泉武
Owner PANASONIC CORP