CN101949970A - Isolated current sampling device of electromagnetic oven - Google Patents
Isolated current sampling device of electromagnetic oven Download PDFInfo
- Publication number
- CN101949970A CN101949970A CN 201010278383 CN201010278383A CN101949970A CN 101949970 A CN101949970 A CN 101949970A CN 201010278383 CN201010278383 CN 201010278383 CN 201010278383 A CN201010278383 A CN 201010278383A CN 101949970 A CN101949970 A CN 101949970A
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- Prior art keywords
- circuit
- current sampling
- current
- access point
- sampling
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- 238000005070 sampling Methods 0.000 title claims abstract description 33
- 239000004020 conductor Substances 0.000 claims abstract description 21
- 238000002955 isolation Methods 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 239000011889 copper foil Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 230000006698 induction Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000001914 filtration Methods 0.000 description 5
- 230000003750 conditioning effect Effects 0.000 description 2
- 229910001006 Constantan Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
The invention relates to an isolated current sampling device of an induction cooker, which is characterized by comprising a conductor, a spiral hollow inductor, an insulating plate and an amplifying circuit, wherein the conductor and the spiral hollow inductor are respectively arranged on two sides of the insulating plate, the insulating plate is provided with a first current sampling access point and a second current sampling access point, the conductor is connected between the first current sampling access point and the second current sampling access point, and two ends of the spiral hollow inductor are electrically connected with the amplifying circuit. The invention has the advantages that the defects of the existing non-isolated current sampling circuit of the induction cooker are overcome, the isolated sampling of the current is realized through a simple structure, and a special filter circuit is not required to be designed in the subsequent circuit of the sampling circuit, so that the cost is low, the interference signal in the circuit is effectively prevented from being transmitted to the current sampling circuit, the current signal obtained by sampling is more accurate, the control and protection circuit system of the induction cooker is favorable for realizing accurate control and timely protection, and the reliability of the product is improved.
Description
Technical field
The present invention relates to a kind of isolation current sampling device of electromagnetic oven, be applicable to the current sample of electromagnetic oven circuit system, belong to electromagnetic oven improvement technology.
Background technology
The current sample mode of electromagnetic oven circuit mainly contains two kinds at present: the one, carry out simple non-isolation sampling by the metal jumper (as constantan wire) of a Gent system; The 2nd, the current transformer by special use carries out comparatively complicated isolation sampling.The current signal that the former obtains very easily is interfered, thereby cause the current sampling signal distortion, usually also need in subsequent conditioning circuit, to adopt the RC filtering circuit to carry out filtering, but owing in the sample rate current that inserts, sneaked into undesired signal, the difficulty of filtering interference signals is bigger, be difficult to electromagnetic oven is controlled accurately and protected, and filtering circuit adopts electron devices such as wave filter more, peripheral circuit complexity, cost are also higher; The latter adopts expensive special use to isolate the sampling electron device, and cost is very high.
Summary of the invention
The objective of the invention is to provides a kind of with low cost in order to overcome the shortcoming of prior art, is easy to realize, can realize that by simple structure the electric current of the electromagnetic oven that the isolation of electric current is sampled is isolated sampling apparatus.
The technical scheme that realizes the object of the invention is: a kind of isolation current sampling device of electromagnetic oven, it is characterized in that comprising electric conductor, spirality air core inductor, insulcrete and amplifying circuit, electric conductor, spirality air core inductor are installed in the two sides of insulcrete respectively, insulcrete is provided with the first current sample access point and the second current sample access point, electric conductor is connected between the first current sample access point and the second current sample access point, and the two ends of spirality air core inductor are electrically connected with amplifying circuit.
Described electric conductor is an electric conductor or two above parallel conductance bodies or is printed on Copper Foil on the insulation course.
Described spirality air core inductor forms around coiling for the independent spirality air core inductor of installing or by the Copper Foil that is printed on the insulation course.
The invention has the beneficial effects as follows; overcome the shortcoming of the non-isolation current sampling circuit of existing electromagnetic oven; promptly realized the isolation sampling of electric current by simple structure; need not to design again special filtering circuit in the subsequent conditioning circuit of sample circuit; therefore; not only cost is low; and prevented that effectively the undesired signal in the circuit is transferred in the current sampling circuit; the current signal that sampling is obtained is more accurate; help electromagnetic oven control and realize accurately control and protection in time, thereby improve reliability of products with the holding circuit system.
Description of drawings
Fig. 1 is a current sampling device decomposition texture synoptic diagram of the present invention;
Fig. 2 is the vertical view of current sampling device of the present invention;
Fig. 3 is the upward view of current sampling device of the present invention.
Omitted among the figure with the present invention and designed the irrelevant miscellaneous part of main points.
Embodiment
Below in conjunction with drawings and Examples the specific embodiment of the present invention is described further.
Embodiment 1:
As shown in Figure 1, 2, 3, the isolation current sampling device of electromagnetic oven of the present invention, comprise electric conductor 1, spirality air core inductor 2, insulcrete 3 and amplifying circuit 4, electric conductor 1, spirality air core inductor 2 are installed in the two sides of insulcrete 3 respectively, insulcrete 3 is provided with the first current sample access point 31 and the second current sample access point 32, electric conductor 1 is connected between the first current sample access point 31 and the second current sample access point 32, and the two ends of spirality air core inductor 2 are electrically connected with amplifying circuit 4.
In the present embodiment, the wire jumper of electric conductor 1 for making by a metallic conductor, insulcrete 3 directly adopts commercially available individual layer PCB circuit board, because of commercially available PCB circuit board surface is coated with insulation course, when therefore electric conductor is connected the first sampling access point 31 and the second sampling access point 32, but the current signal of Direct Sampling PCB circuit board, spirality air core inductor 2 is cored screw shape inductance independently.
Principle of work of the present invention is: when electric current flows through electric conductor 1, can in the spirality air core inductor 2 of insulcrete 3 another sides, produce induction current, induction current is input to amplifying circuit 4 by the two ends of spirality air core inductor 2, obtains the current signal of ultimate demand after amplifying circuit 4 amplifies.
Embodiment 2:
The difference of present embodiment and embodiment 1 is: insulcrete 3 is double-deck PCB circuit board, and electric conductor 1 is made by the Copper Foil that is printed on the insulcrete 3, and spirality air core inductor 2 is formed around coiling by the Copper Foil that is printed on the insulation course 3.Other structure is identical with embodiment 1.
Claims (3)
1. the isolation current sampling device of an electromagnetic oven, it is characterized in that comprising electric conductor (1), spirality air core inductor (2), insulcrete (3) and amplifying circuit (4), electric conductor (1) and spirality air core inductor (2) are installed in the two sides of insulcrete (3) respectively, insulcrete (3) is provided with the first current sample access point (31) and the second current sample access point (32), electric conductor (1) is connected between the first current sample access point (31) and the second current sample access point (32), and the two ends of spirality air core inductor (2) are electrically connected with amplifying circuit (4).
2. the isolation current sampling device of electromagnetic oven according to claim 1 is characterized in that described electric conductor (1) is an electric conductor, two above parallel conductance bodies or is printed on Copper Foil on the insulation course (3).
3. the isolation current sampling device of electromagnetic oven according to claim 1 is characterized in that described spirality air core inductor (2) forms around coiling for spirality air core inductor independently or by the Copper Foil that is printed on the insulation course (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010278383 CN101949970A (en) | 2010-09-12 | 2010-09-12 | Isolated current sampling device of electromagnetic oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010278383 CN101949970A (en) | 2010-09-12 | 2010-09-12 | Isolated current sampling device of electromagnetic oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101949970A true CN101949970A (en) | 2011-01-19 |
Family
ID=43453539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010278383 Pending CN101949970A (en) | 2010-09-12 | 2010-09-12 | Isolated current sampling device of electromagnetic oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101949970A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926447A (en) * | 2014-04-15 | 2014-07-16 | 深圳市新芯矽创电子科技有限公司 | Signal acquiring circuit and switching power source of signal acquiring circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5736846A (en) * | 1995-10-06 | 1998-04-07 | That Corporation | AC current sensor |
| CN2876786Y (en) * | 2005-12-31 | 2007-03-07 | 东莞市前锋电子有限公司 | Current sampler for electromagnetic oven |
| CN201322769Y (en) * | 2008-11-28 | 2009-10-07 | 佛山市顺德区瑞德电子实业有限公司 | Electric current detecting device for electromagnetic oven |
| CN201773139U (en) * | 2010-09-12 | 2011-03-23 | 美的集团有限公司 | Isolated current sampling device of electromagnetic oven |
-
2010
- 2010-09-12 CN CN 201010278383 patent/CN101949970A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5736846A (en) * | 1995-10-06 | 1998-04-07 | That Corporation | AC current sensor |
| CN2876786Y (en) * | 2005-12-31 | 2007-03-07 | 东莞市前锋电子有限公司 | Current sampler for electromagnetic oven |
| CN201322769Y (en) * | 2008-11-28 | 2009-10-07 | 佛山市顺德区瑞德电子实业有限公司 | Electric current detecting device for electromagnetic oven |
| CN201773139U (en) * | 2010-09-12 | 2011-03-23 | 美的集团有限公司 | Isolated current sampling device of electromagnetic oven |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926447A (en) * | 2014-04-15 | 2014-07-16 | 深圳市新芯矽创电子科技有限公司 | Signal acquiring circuit and switching power source of signal acquiring circuit |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110119 |