CN204259198U - Electromagnetic resonant circuit - Google Patents
Electromagnetic resonant circuit Download PDFInfo
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- CN204259198U CN204259198U CN201420805318.2U CN201420805318U CN204259198U CN 204259198 U CN204259198 U CN 204259198U CN 201420805318 U CN201420805318 U CN 201420805318U CN 204259198 U CN204259198 U CN 204259198U
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- resonant circuit
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Abstract
The utility model provides a kind of electromagnetic resonant circuit, comprising: power module; First resonant circuit, its first end is connected to power module; The first transistor assembly, is connected to the second end of the first resonant circuit; Second resonant circuit, its first end is connected to power module; Transistor seconds assembly, is connected to the second end of the second resonant circuit; Reference signal testing circuit, its first end is connected to the output of power module; Resonance sync detection circuit, the second end of the first resonant circuit is connected to the first end of resonance sync detection circuit by the first switch element, the second end of the second resonant circuit is connected to the first end of resonance sync detection circuit by second switch element; Comparator, compares the signal that reference signal testing circuit and resonance sync detection circuit detect.What the utility model accurately can control transistor opens opportunity, guarantees that transistor ON is synchronous with the resonance of resonant circuit.
Description
Technical field
The utility model relates to Electromagnetism Oscillation Technique field, in particular to a kind of electromagnetic resonant circuit.
Background technology
At present, the coil panel adopting two to work alone realizes the Electromagnetic Heating product heated pan different parts, as electric cooker, electromagnetic oven etc., because culinary art effect is better, obtains extensively universal.
But, in actual applications, because the mounting distance of two coil panels is limited, can produce induced voltage on another coil panel during the work of one of them coil panel, when synchronous voltage signal is sampled, induced voltage exists as an interference source, the judgement of processor to synchronizing signal is made to occur mistake, cause IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) to open occurring abnormal, and there will be the problem that IGBT punctures.
Therefore, how can avoid producing interference between multiple coil panel and impact is opened the control on opportunity to IGBT and become technical problem urgently to be resolved hurrily.
Utility model content
The utility model is intended at least to solve one of technical problem existed in above-mentioned prior art or correlation technique.
For this reason, an object of the present utility model is to propose a kind of new electromagnetic resonant circuit, what accurately can control transistor opens opportunity, guarantee that transistor ON is synchronous with the resonance of resonant circuit, avoid transistor ON to cause transistor to puncture too early, also avoid transistor ON cross slowly and affect the normal work of circuit simultaneously.
For achieving the above object, according to the embodiment of first aspect of the present utility model, propose a kind of electromagnetic resonant circuit, comprising: power module; First resonant circuit, the first end of described first resonant circuit is connected to described power module; The first transistor assembly, is connected to the second end of described first resonant circuit, for controlling the operating state of described first resonant circuit; Second resonant circuit, the first end of described second resonant circuit is connected to described power module; Transistor seconds assembly, is connected to the second end of described second resonant circuit, for controlling the operating state of described second resonant circuit; Reference signal testing circuit, the first end of described reference signal testing circuit is connected to the output of described power module; Resonance sync detection circuit, second end of described first resonant circuit is connected to the first end of described resonance sync detection circuit by the first switch element, the second end of described second resonant circuit is connected to the first end of described resonance sync detection circuit by second switch element; Comparator, second end of described reference signal testing circuit and the second end of described resonance sync detection circuit are all connected to the input of described comparator, and described comparator is used for comparing the signal that described reference signal testing circuit and described resonance sync detection circuit detect.
According to the electromagnetic resonant circuit of embodiment of the present utility model, during due to resonant circuit (being described for a first resonant circuit below) job wherein, induced voltage can be produced on the coil panel of another resonant circuit (being described for the second resonant circuit below), but the resonance of the second resonant circuit lags behind the first resonant circuit, when the second end of the first resonant circuit to be connected to the first end of resonance sync detection circuit by the first switch element, when second end of the second resonant circuit is connected to the first end of resonance synchronous circuit by second switch element, the difference making comparator can detect between the reference signal that the resonance potential of the first resonant circuit and reference signal testing circuit detect exactly is reduced to moment when 0, and then to determine that according to this moment the moment of the resonance potential zero crossing of the first resonant circuit provides foundation for other devices, thus accurately control the switch opportunity of transistor in the first transistor assembly, guarantee that transistor ON is synchronous with the resonance of the first resonant circuit, transistor ON is avoided to cause transistor to puncture too early, also avoid transistor ON cross slow and affect the normal work of circuit simultaneously.
In addition, according to the electromagnetic resonant circuit of the utility model above-described embodiment, following additional technical characteristic can also be had:
According to an embodiment of the present utility model, described first switch element and described second switch element include: a diode or the multiple diodes be connected in series.Preferably, described diode is fast recovery diode.
According to another embodiment of the present utility model, described first switch element and described second switch element comprise: mechanical switch or electronic switch.
According to an embodiment of the present utility model, also comprise: controller, be connected to described mechanical switch or described electronic switch, for controlling the on off state of described mechanical switch or described electronic switch.
According to an embodiment of the present utility model, each circuit in described reference signal testing circuit and described resonance sync detection circuit comprises: the multiple sectional pressure elements be connected in series, one end after described multiple sectional pressure element is connected in series is as the first end of described each circuit, other end ground connection after described multiple sectional pressure element is connected in series, in described multiple sectional pressure element between any two sectional pressure elements as the second end of described each circuit.Preferably, described sectional pressure element comprises resistive element.
According to an embodiment of the present utility model, each transistor component in described the first transistor assembly and described transistor seconds assembly comprises: transistor; And drive circuit, be connected to the control end of described transistor.Transistor can be IGBT.
According to an embodiment of the present utility model, described power module comprises: rectification circuit, is connected to AC power, carries out rectification process, to obtain direct voltage for the voltage exported described AC power; Filter circuit, is connected to described rectification circuit, for carrying out filtering process to the described direct voltage after described rectification circuit process, and is supplied to described first resonant circuit and described second resonant circuit.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 shows the structural representation of the electromagnetic resonant circuit according to an embodiment of the present utility model;
Fig. 2 shows the structural representation of the electromagnetic resonant circuit according to another embodiment of the present utility model.
Embodiment
In order to more clearly understand above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the drawings and specific embodiments, the utility model is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the utility model; but; the utility model can also adopt other to be different from other modes described here and implement, and therefore, protection range of the present utility model is not by the restriction of following public specific embodiment.
As illustrated in fig. 1 and 2, according to the electromagnetic resonant circuit of embodiment of the present utility model, comprising: power module 1; First resonant circuit 21, the first end of described first resonant circuit 21 is connected to described power module 1; The first transistor assembly 31, is connected to the second end of described first resonant circuit 21, for controlling the operating state of described first resonant circuit 21; Second resonant circuit 22, the first end of described second resonant circuit 22 is connected to described power module 1; Transistor seconds assembly 32, is connected to the second end of described second resonant circuit 22, for controlling the operating state of described second resonant circuit 22; Reference signal testing circuit 5, the first end of described reference signal testing circuit 5 is connected to the output of described power module 1; Resonance sync detection circuit 6, second end of described first resonant circuit 21 is connected to the first end of described resonance sync detection circuit 6 by the first switch element 71, the second end of described second resonant circuit 22 is connected to the first end of described resonance sync detection circuit 6 by second switch element 72; Comparator 8, second end of described reference signal testing circuit 5 and the second end of described resonance sync detection circuit 6 are all connected to the input of described comparator 8, and described comparator 8 compares for the signal detected described reference signal testing circuit 5 and described resonance sync detection circuit 6.
During due to resonant circuit (being described for a first resonant circuit 21 below) job wherein, induced voltage can be produced on the coil panel of another resonant circuit (being described for the second resonant circuit 22 below), but the resonance of the second resonant circuit 22 lags behind the first resonant circuit 21, when the second end of the first resonant circuit 21 to be connected to the first end of resonance sync detection circuit 6 by the first switch element 71, when second end of the second resonant circuit 22 is connected to the first end of resonance synchronous circuit by second switch element 72, the difference making comparator 8 can detect between the reference signal that the resonance potential of the first resonant circuit 21 and reference signal testing circuit 5 detect exactly is reduced to moment when 0, and then to determine that according to this moment the moment of the resonance potential zero crossing of the first resonant circuit 21 provides foundation for other devices, thus accurately control the switch opportunity of transistor in the first transistor assembly 31, guarantee that transistor ON is synchronous with the resonance of the first resonant circuit 21, transistor ON is avoided to cause transistor to puncture too early, also avoid transistor ON cross slow and affect the normal work of circuit simultaneously.
In addition, according to the electromagnetic resonant circuit of the utility model above-described embodiment, following additional technical characteristic can also be had:
In the utility model, the first switch element 71 and second switch element 72 can have following two kinds of ways of realization:
Way of realization one:
According to an embodiment of the present utility model, as shown in Figure 1, described first switch element 71 and described second switch element 72 include: a diode or the multiple diodes (there is shown the situation that the first switch element 71 and second switch element 72 are two Diode series, those skilled in the art it will be appreciated that the first switch element 71 and second switch element 72 can also be a diode or the series connection more than two diodes) be connected in series.Wherein, diode preferably uses fast recovery diode, when a use diode, needing the reverse voltage that can bear higher than more than 1000V, when using multiple diode, ensureing that the reverse voltage endurance capability after multiple Diode series can reach more than 1000V.
Way of realization two:
According to another embodiment of the present utility model, as shown in Figure 2, described first switch element 71 and described second switch element 72 comprise: mechanical switch or electronic switch.
According to an embodiment of the present utility model, also comprise: controller (not shown), be connected to described mechanical switch or described electronic switch, for controlling the on off state of described mechanical switch or described electronic switch.
According to an embodiment of the present utility model, each circuit in described reference signal testing circuit 5 and described resonance sync detection circuit 6 comprises: the multiple sectional pressure elements be connected in series, one end after described multiple sectional pressure element is connected in series is as the first end of described each circuit, other end ground connection after described multiple sectional pressure element is connected in series, in described multiple sectional pressure element between any two sectional pressure elements as the second end of described each circuit.Preferably, described sectional pressure element comprises resistive element.
According to an embodiment of the present utility model, each transistor component in described the first transistor assembly 31 and described transistor seconds assembly 32 comprises: transistor; And drive circuit, be connected to the control end of described transistor.Wherein transistor can be IGBT.Particularly, as the first transistor assembly 31 comprises transistor 311 and drive circuit 312; Transistor seconds assembly 32 comprises transistor 321 and drive circuit 322.
According to an embodiment of the present utility model, described power module 1 comprises: rectification circuit 12, is connected to AC power 11, carries out rectification process, to obtain direct voltage for the voltage exported described AC power 11; Filter circuit 13, is connected to described rectification circuit 12, for carrying out filtering process to the described direct voltage after described rectification circuit 12 process, and is supplied to described first resonant circuit 21 and described second resonant circuit 22.
More than be described with reference to the accompanying drawings the technical solution of the utility model, the utility model proposes a kind of new electromagnetic resonant circuit, what accurately can control transistor opens opportunity, guarantee that transistor ON is synchronous with the resonance of resonant circuit, avoid transistor ON to cause transistor to puncture too early, also avoid transistor ON cross slowly and affect the normal work of circuit simultaneously.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. an electromagnetic resonant circuit, is characterized in that, comprising:
Power module;
First resonant circuit, the first end of described first resonant circuit is connected to described power module;
The first transistor assembly, is connected to the second end of described first resonant circuit, for controlling the operating state of described first resonant circuit;
Second resonant circuit, the first end of described second resonant circuit is connected to described power module;
Transistor seconds assembly, is connected to the second end of described second resonant circuit, for controlling the operating state of described second resonant circuit;
Reference signal testing circuit, the first end of described reference signal testing circuit is connected to the output of described power module;
Resonance sync detection circuit, second end of described first resonant circuit is connected to the first end of described resonance sync detection circuit by the first switch element, the second end of described second resonant circuit is connected to the first end of described resonance sync detection circuit by second switch element;
Comparator, second end of described reference signal testing circuit and the second end of described resonance sync detection circuit are all connected to the input of described comparator, and described comparator is used for comparing the signal that described reference signal testing circuit and described resonance sync detection circuit detect.
2. electromagnetic resonant circuit according to claim 1, is characterized in that, described first switch element and described second switch element include:
A diode or the multiple diodes be connected in series.
3. electromagnetic resonant circuit according to claim 2, is characterized in that, described diode is fast recovery diode.
4. electromagnetic resonant circuit according to claim 1, is characterized in that, described first switch element and described second switch element comprise: mechanical switch or electronic switch.
5. electromagnetic resonant circuit according to claim 4, is characterized in that, also comprises:
Controller, is connected to described mechanical switch or described electronic switch, for controlling the on off state of described mechanical switch or described electronic switch.
6. electromagnetic resonant circuit according to claim 1, is characterized in that, each circuit in described reference signal testing circuit and described resonance sync detection circuit comprises:
The multiple sectional pressure elements be connected in series, one end after described multiple sectional pressure element is connected in series is as the first end of described each circuit, other end ground connection after described multiple sectional pressure element is connected in series, in described multiple sectional pressure element between any two sectional pressure elements as the second end of described each circuit.
7. electromagnetic resonant circuit according to claim 6, is characterized in that, described sectional pressure element comprises resistive element.
8. electromagnetic resonant circuit according to claim 1, is characterized in that, each transistor component in described the first transistor assembly and described transistor seconds assembly comprises:
Transistor; And
Drive circuit, is connected to the control end of described transistor.
9. electromagnetic resonant circuit according to claim 8, is characterized in that, described transistor comprises insulated gate bipolar transistor.
10. electromagnetic resonant circuit according to any one of claim 1 to 9, is characterized in that, described power module comprises:
Rectification circuit, is connected to AC power, carries out rectification process, to obtain direct voltage for the voltage exported described AC power;
Filter circuit, is connected to described rectification circuit, for carrying out filtering process to the described direct voltage after described rectification circuit process, and is supplied to described first resonant circuit and described second resonant circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420805318.2U CN204259198U (en) | 2014-12-17 | 2014-12-17 | Electromagnetic resonant circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420805318.2U CN204259198U (en) | 2014-12-17 | 2014-12-17 | Electromagnetic resonant circuit |
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| CN204259198U true CN204259198U (en) | 2015-04-08 |
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| CN201420805318.2U Active CN204259198U (en) | 2014-12-17 | 2014-12-17 | Electromagnetic resonant circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106162973A (en) * | 2015-04-28 | 2016-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic resonant circuit, its control method and control system thereof |
-
2014
- 2014-12-17 CN CN201420805318.2U patent/CN204259198U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106162973A (en) * | 2015-04-28 | 2016-11-23 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic resonant circuit, its control method and control system thereof |
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