CN203103074U - Transformer magnetic core of microwave oven variable-frequency power supply - Google Patents
Transformer magnetic core of microwave oven variable-frequency power supply Download PDFInfo
- Publication number
- CN203103074U CN203103074U CN 201320055791 CN201320055791U CN203103074U CN 203103074 U CN203103074 U CN 203103074U CN 201320055791 CN201320055791 CN 201320055791 CN 201320055791 U CN201320055791 U CN 201320055791U CN 203103074 U CN203103074 U CN 203103074U
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- magnetic core
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- power supply
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Abstract
The utility model discloses a transformer magnetic core of a microwave oven variable-frequency power supply. The transformer magnetic core comprises a middle column, a side column and a connecting column, wherein the area of the cross section of the middle column is larger than that of the cross section of the side column, and larger than that of the cross section of the connecting column. The transformer magnetic core reduces the use quantity of magnetic materials, reduces the size of a high-frequency transformer, and reduces cost of the high-frequency transformer.
Description
[technical field]
The utility model relates to the microwave oven variable frequency power supply, relates in particular to a kind of magnetic core of transformer of microwave oven variable frequency power supply.
[background technology]
Existing microwave oven variable frequency power supply has adopted the high-frequency electronic transformer to replace traditional Industrial Frequency Transformer, characteristics such as the high-frequency electronic transformer has efficient height, good reliability, operating voltage is wide, volume is little, in light weight, compare traditional transformer and can save a large amount of non-ferrous metals, energy-conserving and environment-protective more simultaneously.Common microwave oven high frequency transformer is made of low pressure winding, high pressure winding, Filament Winding, drum stand and magnetic core.The high frequency transformer magnetic core of a good design can be optimized the performance of transformer preferably, makes the copper cash use amount of winding and the use amount of magnetic material reach more excellent level, saves cost, can promote the product reliability of microwave oven variable frequency power supply simultaneously.
As shown in Figure 1, the magnetic core of transformer of microwave oven variable frequency power supply comprises center pillar 1, side column 2 and joint pin 3, the sectional area of the center pillar of traditional U type magnetic core equates basically with the sectional area of side column and joint pin, can verify by test and emulation, for the U type magnetic core of coiling on the center pillar, after adding electric current on the center pillar, the overwhelming majority of the magnetic line of force that magnetizing current produced has been passed the center pillar magnetic core, and some magnetic line of force does not then pass side column magnetic core and joint pin magnetic core.When center pillar reached capacity, side column also had considerable allowance, and the radiating condition of side column is good, and the radiating condition of center pillar is poor, and under equal conditions, the magnetic core temperature is high more easy more saturated.Therefore, the side column and the joint pin part of conventional U type magnetic core are unnecessary, have increased the volume of high frequency transformer, have improved the cost of high frequency transformer.
As illustrated in fig. 1 and 2, former limit and time limit winding 4 have been installed on traditional U type magnetic core, only some passes side column to pass the magnetic line of force of center pillar 1, and the magnetic flux density of center pillar 1 is greater than the magnetic flux density of side column 2, and side column 2 magnetic core areas are not utilized effectively.
[summary of the invention]
The technical problems to be solved in the utility model provides the magnetic core of transformer of less, the lower-cost microwave oven variable frequency power supply of a kind of volume.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is a kind of magnetic core of transformer of microwave oven variable frequency power supply, comprise center pillar, side column and joint pin, the sectional area of centre pillar cross-section are greater than the sectional area of side column cross section, greater than the sectional area of joint pin cross section.
The magnetic core of transformer of above-described microwave oven variable frequency power supply, the sectional area of centre pillar cross-section be the side column cross section sectional area 1.5-2 doubly, for the 1.5-2 of the sectional area of joint pin cross section doubly.
The magnetic core of transformer of above-described microwave oven variable frequency power supply, described magnetic core of transformer are U type magnetic core.
The magnetic core of transformer of above-described microwave oven variable frequency power supply, the cross section of center pillar are circular, and the cross section of side column and joint pin is a rectangle.
The magnetic core of transformer of the utility model microwave oven variable frequency power supply is optimized the each several part area, has reduced the consumption of magnetic material, has reduced the volume of high frequency transformer, has reduced the cost of high frequency transformer.
[description of drawings]
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the structural representation of prior art U type magnetic core.
Fig. 2 is the magnetic line of force distribution schematic diagram of the structure of prior art U type magnetic core.
Fig. 3 is the structural representation of the utility model embodiment U type magnetic core.
Fig. 4 is the magnetic line of force distribution schematic diagram of the utility model embodiment U type magnetic core.
[embodiment]
In Fig. 3, the utility model embodiment shown in Figure 4, the magnetic core of transformer of microwave oven variable frequency power supply is a U type magnetic core, comprises center pillar 1, and side column 2 and joint pin 3, the cross section of center pillar 1 are circular, and the cross section of side column 2 and joint pin 3 is a rectangle.
The cross section sectional area A1 of center pillar 1 be side column 2 cross section sectional area A2 1.5-2 doubly, for the 1.5-2 of joint pin 3 cross section sectional area A3 doubly.
That is: A1=A2 * (1.5-2)=A3 * (1.5-2)
As shown in Figure 4, compared with prior art, the magnetic line of force of side column 2 and center pillar 1 has obtained redistribution.The magnetic flux density of side column 2 significantly increases, and the magnetic core effective volume is utilized effectively.
The above embodiment of the utility model optimizes the each several part area of magnetic core by reducing the area of side column and joint pin, and the balanced distribution of the magnetic line of force can reduce the consumption of magnetic material.The utility model under the undiminished situation of the overcurrent capability of transformer, has reduced the volume of high frequency transformer at the consumption that does not increase copper cash, has reduced the cost of product.
Claims (4)
1. the magnetic core of transformer of a microwave oven variable frequency power supply comprises center pillar, and side column and joint pin is characterized in that, the sectional area of centre pillar cross-section is greater than the sectional area of side column cross section, greater than the sectional area of joint pin cross section.
2. the magnetic core of transformer of microwave oven variable frequency power supply according to claim 1 is characterized in that, the sectional area of centre pillar cross-section be the side column cross section sectional area 1.5-2 doubly, for the 1.5-2 of the sectional area of joint pin cross section doubly.
3. the magnetic core of transformer of microwave oven variable frequency power supply according to claim 1 is characterized in that, described magnetic core of transformer is a U type magnetic core.
4. the magnetic core of transformer of microwave oven variable frequency power supply according to claim 1 is characterized in that, the cross section of center pillar is circular, and the cross section of side column and joint pin is a rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320055791 CN203103074U (en) | 2013-01-31 | 2013-01-31 | Transformer magnetic core of microwave oven variable-frequency power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320055791 CN203103074U (en) | 2013-01-31 | 2013-01-31 | Transformer magnetic core of microwave oven variable-frequency power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203103074U true CN203103074U (en) | 2013-07-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320055791 Expired - Lifetime CN203103074U (en) | 2013-01-31 | 2013-01-31 | Transformer magnetic core of microwave oven variable-frequency power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203103074U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106373751A (en) * | 2016-11-11 | 2017-02-01 | 深圳市莱福德光电有限公司 | High-frequency transformer |
-
2013
- 2013-01-31 CN CN 201320055791 patent/CN203103074U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106373751A (en) * | 2016-11-11 | 2017-02-01 | 深圳市莱福德光电有限公司 | High-frequency transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130731 |