CN203457343U - Electromagnetic heating device and control circuit thereof - Google Patents
Electromagnetic heating device and control circuit thereof Download PDFInfo
- Publication number
- CN203457343U CN203457343U CN201320414317.0U CN201320414317U CN203457343U CN 203457343 U CN203457343 U CN 203457343U CN 201320414317 U CN201320414317 U CN 201320414317U CN 203457343 U CN203457343 U CN 203457343U
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- Prior art keywords
- selector switch
- control circuit
- resonance coil
- resonance
- resonant capacitance
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
Abstract
The utility model discloses an electromagnetic heating device and a control circuit thereof. The control circuit of the electromagnetic heating device comprises a choking coil, a resonance heating module, a selection switch and more than two capacitors. The resonance heating module comprises more than one resonance capacitor and more than two resonance coils. One end of the selection switch is connected with the choking coil, and the other end is connected with one end of each resonance coil. Each capacitor is corresponding to each resonance coil in a one-to-one way. One end of each capacitor is connected between one end of the corresponding resonance coil and the other end of the selection switch, and the other end of each capacitor is grounded. The more than two capacitors are post-positioned in an internal part of a resonance circuit so that energy is provided for the resonance heating module by the more than two capacitors when the selection switch is closed. Besides, when the selection switch receives a shut-off signal, a residual voltage existing in the capacitors can be utilized to supply an inverse voltage to the selection switch so that the selection switch can be effectively shut off, and the circuit is enabled to be stable and reliable. The utility model also discloses the electromagnetic heating device with the aforementioned control circuit.
Description
Technical field
The utility model relates to electromagnetic heating technique field, particularly a kind of control circuit of electromagnetic heater and a kind of electromagnetic heater with this control circuit.
Background technology
Existing electromagnetic heater is for example in the control circuit of electromagnetic oven, its filter capacitor is arranged between choking-winding and resonant circuit conventionally, when resonant circuit is more than two, in the time of need to carrying out selectivity heating, can control the resonant circuit of selecting to need heating by the certain switch of configuration, now filter capacitor only plays the effect that energy is provided for resonant circuit, can not play the effect that switch is effectively turn-offed, be unfavorable for the stable of circuit, the reliability of circuit is not high.
Utility model content
The purpose of this utility model is intended to solve at least to a certain extent above-mentioned technological deficiency.
For this reason, a kind of by by the control circuit of the rearmounted electromagnetic heater solving the problems of the technologies described above at one stroke of filter capacitor thereby the utility model need to propose.
For achieving the above object, the control circuit of a kind of electromagnetic heater the utility model proposes, comprising: choking-winding, and one end of described choking-winding is connected with electric main; Resonance heating module, described resonance heating module comprises more than one resonant capacitance and plural resonance coil, described resonant capacitance is in parallel with described resonance coil or be connected in series; Selector switch, one end of described selector switch is connected with the other end of described choking-winding, and the other end of described selector switch is all connected with one end of resonance coil described in each; Plural electric capacity, each electric capacity in described plural electric capacity is corresponding one by one with described each resonance coil, one end of described each electric capacity is connected between one end of corresponding resonance coil and the other end of described selector switch, the other end ground connection of described each electric capacity; Wherein, described plural electric capacity for described resonance heating module provides resonant energy, and provides reverse voltage to described selector switch so that described selector switch turn-offs when described selector switch is closed when described selector switch receives cut-off signals.
According to the control circuit the utility model proposes, inner rearmounted between selector switch and resonance coil by plural electric capacity being arranged on to resonant circuit, thereby make plural electric capacity not only when selector switch is closed for resonance heating module provides energy, and when selector switch receives cut-off signals, because electric capacity also exists residual voltage, can provide reverse voltage to selector switch so that selector switch effectively turn-offs, solved at one stroke existing technical problem, guaranteed that circuit is reliable and stable.
Wherein, described resonant capacitance is one, described plural resonance coil is parallel with one another, and one end of described resonant capacitance is connected between the other end of described choking-winding and one end of described selector switch, and the other end of described resonant capacitance is connected with the other end of resonance coil described in each.
In addition, described resonant capacitance is more than two, described in each resonant capacitance and resonance coil described in each one by one corresponding formation be connected in parallel, described in each, one end of resonant capacitance is connected between one end of corresponding resonance coil and the other end of described selector switch, and described in each, the other end of resonant capacitance is connected with the other end of resonance coil described in each.
In the utility model, described plural electric capacity is filter capacitor.
Wherein, described cut-off signals is exported by the controller of described electromagnetic heater, and described controller is connected with the control end of described selector switch.
Preferably, described selector switch can be thrown formula switch or two above single-pole single-throw(SPST formula switches for hilted broadsword more.When described selector switch is more than two during single-pole single-throw(SPST formula switch, each the single-pole single-throw(SPST formula switch in described two above single-pole single-throw(SPST formula switches is corresponding connected one by one with described each resonance coil.
In addition, described selector switch can also be two above relays, controllable silicon, IGBT or metal-oxide-semiconductors, and each relay, controllable silicon, IGBT or metal-oxide-semiconductor are corresponding connected one by one with described each resonance coil.
Wherein, described controller is also connected with the control end of the power switch of described electromagnetic heater, and one end of described power switch is connected with the other end of described each resonance coil, the other end ground connection of described power switch.Preferably, power switch can be IGBT.
Preferably, described control circuit also comprises: for detection of the zero passage detection module of the zero cross signal of described electric main, one end of described zero passage detection module is connected between the output of rectification module and one end of described choking-winding of described electromagnetic heater, the other end of described zero passage detection module is connected with described controller, the input of described rectification module is connected with described electric main, and described controller is controlled described selector switch according to described zero cross signal and switched.
Preferably, described control circuit also comprises: for detection of the zero passage detection module of the zero cross signal of described electric main, one end of described zero passage detection module is connected to the input of described electric main, the other end of described zero passage detection module is connected with described controller, and described controller is controlled described selector switch according to described zero cross signal and switched.
In addition, the utility model has also proposed a kind of electromagnetic heater, and it comprises control circuit described above.Wherein, described electromagnetic heater can be electromagnetic oven, electromagnetic rice cooker or prevention electromagnetic pressure cooker.
The aspect that the utility model is additional and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the utility model and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein:
Fig. 1 is the control circuit schematic diagram according to the electromagnetic heater of the utility model embodiment;
Fig. 2 is according to the control circuit schematic diagram of the electromagnetic heater of an embodiment of the utility model;
Fig. 3 is the control circuit schematic diagram according to the electromagnetic heater of another embodiment of the utility model; And
Fig. 4 is the control circuit schematic diagram according to the electromagnetic heater of another embodiment of the utility model.
Reference numeral:
Embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Disclosing below provides many different embodiment or example to be used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the utility model.In addition, the utility model can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and object clearly, itself do not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the utility model provides and the example of material, but those of ordinary skills can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, First Characteristic described below Second Characteristic it " on " structure can comprise that the first and second Characteristics creations are for the direct embodiment of contact, also can comprise the embodiment of other Characteristics creation between the first and second features, such the first and second features may not be direct contacts.
In description of the present utility model, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be to be directly connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
With reference to description and accompanying drawing below, by these and other aspects of clear embodiment of the present utility model.In these descriptions and accompanying drawing, specifically disclose some specific implementations in embodiment of the present utility model, represent to implement some modes of the principle of embodiment of the present utility model, but should be appreciated that the scope of embodiment of the present utility model is not limited.On the contrary, embodiment of the present utility model comprises spirit and all changes within the scope of intension, modification and the equivalent that falls into additional claims.
The control circuit of the electromagnetic heater proposing according to the utility model embodiment and the electromagnetic heater with this control circuit are described with reference to the accompanying drawings.
Fig. 1 is the control circuit schematic diagram according to the electromagnetic heater of the utility model embodiment.As shown in Figure 1, the control circuit of this electromagnetic heater comprises choking-winding L, resonance heating module 10, selector switch 20 and plural capacitor C 0.
Wherein, resonance heating module 10 comprises more than one resonant capacitance C1 and plural resonance coil L1, and resonant capacitance C1 is in parallel with resonance coil L1 or be connected in series.One end of choking-winding L is connected with electric main AC, one end of selector switch 20 is connected with the other end of choking-winding L, the other end of selector switch 20 is all connected with the one end of each resonance coil L1 in plural resonance coil, each capacitor C 0 in plural electric capacity is corresponding one by one with each resonance coil L1, one end of each capacitor C 0 is connected between one end of corresponding resonance coil L1 and the other end of selector switch 20, the other end ground connection of each capacitor C 0.Wherein, plural capacitor C 0 for resonance heating module 10 provides resonant energy so that resonance heating module 10 heats, and provides reverse voltage to selector switch 20 so that selector switch 20 turn-offs when selector switch 20 is closed when selector switch 20 receives cut-off signals.
In an embodiment of the present utility model, as shown in Figure 1, resonant capacitance C1 is one, plural resonance coil L1 is parallel with one another, one end of resonant capacitance C1 is connected between the other end of choking-winding L and one end of selector switch 20, and the other end of resonant capacitance C1 is connected with the other end of each resonance coil L1.
As shown in Figure 1, the control circuit of the electromagnetic heater of the utility model embodiment also comprises controller 30, power switch 40, rectification module 50.Wherein, power switch 40 can be IGBT(Insulated Gate Bipolar Transistor, insulated gate bipolar transistor).
In embodiment of the present utility model, the controller 30 of cut-off signals by electromagnetic heater for example MCU exported, and controller 30 is connected with the control end of selector switch 20.Certainly, controller 30 also export open signal to selector switch 20 to control selector switch 20 closures.And, controller 30 also with the control end of the power switch 40 of electromagnetic heater for example the gate pole G of IGBT be connected, one end of power switch 40 for example collector electrode C of IGBT is connected with the other end of each resonance coil L1, and the other end of power switch 40 is the emitter E ground connection of IGBT for example.
As shown in Figure 1, in embodiment of the present utility model, plural resonance coil L1 is Electromagnetic Heating unit, selector switch 10 is connected with plural resonance coil L1 afterwards and resonant capacitance C1 composes in parallel resonant tank, resonant heating circuit is comprised of resonant capacitance C1 and two above resonance coil L1, the utility model is connected to resonant heating circuit inside by two above capacitor C 0, say, each capacitor C 0 in two above electric capacity is corresponding one by one with each resonance coil L1, one end of each capacitor C 0 is connected between one end of corresponding resonance coil L1 and the other end of selector switch 20, the other end ground connection of each capacitor C 0.
The utility model is by two above capacitor C 0 postposition, more than making two, capacitor C 0 not only can be when selector switch 20 be closed, for resonant heating circuit provides energy, and when selector switch 20 disconnects, because two above capacitor C 0 also exist residual voltage, can provide instead partially to selector switch 20, selector switch 20 can effectively be turn-offed.
In another embodiment of the present utility model, as shown in Figure 4, resonant capacitance C1 is two when above, for example two, each resonant capacitance C1 and each resonance coil L1 one by one corresponding formation are connected in parallel, one end of each resonant capacitance C1 is connected between one end of corresponding resonance coil and the other end of selector switch, and the other end of each resonant capacitance C1 is connected with the other end of each resonance coil L1.
In embodiment of the present utility model, plural capacitor C 0 is filter capacitor.
In embodiment more of the present utility model, selector switch 20 can be thrown formula switch or two above single-pole single-throw(SPST formula switches for hilted broadsword more, and when selector switch 20 be more than two during single-pole single-throw(SPST formula switch, each the single-pole single-throw(SPST formula switch in two above single-pole single-throw(SPST formula switches is corresponding connected one by one with each resonance coil L1.
In other embodiment of the present utility model, selector switch 20 can be the semiconductor switchs such as two above relays, controllable silicon, IGBT or metal-oxide-semiconductors, and each relay, controllable silicon, IGBT or metal-oxide-semiconductor are corresponding connected one by one with each resonance coil L1.
Preferably, in an embodiment of the present utility model, as shown in Figure 2, the control circuit of above-mentioned electromagnetic heater also comprises zero passage detection module 60.Wherein, zero passage detection module 60 is for detection of the zero cross signal of the electric main AC of input, controller 30 is controlled selector switch 20 according to zero cross signal and is switched, say, the zero cross signal of the electric main that controller 30 detects according to zero passage detection module 60 moves when determining that selector switch 20 switches when line voltage zero passage, without safety time interval, thereby make power there is continuity.One end of zero passage detection module 60 is connected between the output of rectification module 50 and one end of choking-winding L of electromagnetic heater, the other end of zero passage detection module 60 is connected with controller 30, the input of rectification module 50 is connected with input AC civil power AC, and the other end of choking-winding L is connected with one end of selector switch 20.
In another embodiment of the present utility model, as shown in Figure 3, the control circuit of above-mentioned electromagnetic heater also comprises zero passage detection module 60, different from Fig. 2 is, one end of zero passage detection module 60 is connected to the input of the electric main AC of input, the other end of zero passage detection module 60 is connected with controller 30, and zero passage detection module 60 is in order to detect the zero cross signal of input AC civil power AC equally, and controller 30 switches according to zero cross signal control selector switch 20.
It should be noted that, in the utility model, when selector switch 20 is that semiconductor switch is for example when controllable silicon, metal-oxide-semiconductor, the control signal of exporting due to controller 30 only can be effective to opening of semiconductor switch, cannot make it effectively turn-off, and the utility model passes through two above capacitor C 0 postposition in resonant circuit, while making selector switch 20 receive cut-off signals, because electric capacity also exists residual voltage, can provide reverse voltage to selector switch 20 so that selector switch 20 effectively turn-offs, therefore, the utility model is effective especially to semiconductor switch.
According to the control circuit of the utility model embodiment, inner rearmounted between selector switch and resonance coil by two above electric capacity being arranged on to resonant circuit, thereby make two above electric capacity not only when selector switch is closed for resonance heating module provides energy, and when selector switch receives cut-off signals, because electric capacity also exists residual voltage, when civil power zero passage, can provide reverse voltage to selector switch so that selector switch effectively turn-offs, solved at one stroke existing technical problem, guaranteed that circuit is reliable and stable.In addition, can also determine that selector switch moves while switching when line voltage zero passage, without safety time interval, thereby makes power have continuity.
In addition, the utility model has also proposed a kind of electromagnetic heater, and it comprises control circuit described above.Wherein, electromagnetic heater can be electromagnetic oven, electromagnetic rice cooker or prevention electromagnetic pressure cooker etc.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that in the situation that not departing from principle of the present utility model and spirit and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is by claims and be equal to and limit.
Claims (10)
1. a control circuit for electromagnetic heater, is characterized in that, comprising:
Choking-winding, one end of described choking-winding is connected with electric main;
Resonance heating module, described resonance heating module comprises more than one resonant capacitance and plural resonance coil, described resonant capacitance is in parallel with described resonance coil or be connected in series; Selector switch, one end of described selector switch is connected with the other end of described choking-winding, and the other end of described selector switch is all connected with one end of resonance coil described in each;
Plural electric capacity, each electric capacity in described plural electric capacity is corresponding one by one with described each resonance coil, one end of described each electric capacity is connected between one end of corresponding resonance coil and the other end of described selector switch, the other end ground connection of described each electric capacity;
Wherein, described plural electric capacity for described resonance heating module provides resonant energy, and provides reverse voltage to described selector switch so that described selector switch turn-offs when described selector switch is closed when described selector switch receives cut-off signals.
2. control circuit as claimed in claim 1, it is characterized in that, described resonant capacitance is one, described plural resonance coil is parallel with one another, one end of described resonant capacitance is connected between the other end of described choking-winding and one end of described selector switch, and the other end of described resonant capacitance is connected with the other end of resonance coil described in each.
3. control circuit as claimed in claim 1, it is characterized in that, described resonant capacitance is more than two, described in each resonant capacitance and resonance coil described in each one by one corresponding formation be connected in parallel, described in each, one end of resonant capacitance is connected between one end of corresponding resonance coil and the other end of described selector switch, and described in each, the other end of resonant capacitance is connected with the other end of resonance coil described in each.
4. control circuit as claimed in claim 1, is characterized in that, described plural electric capacity is filter capacitor.
5. control circuit as claimed in claim 1, is characterized in that, described cut-off signals is exported by the controller of described electromagnetic heater, and described controller is connected with the control end of described selector switch.
6. control circuit as claimed in claim 1, is characterized in that, described selector switch is that hilted broadsword is thrown formula switch or two above single-pole single-throw(SPST formula switches more.
7. control circuit as claimed in claim 2, it is characterized in that, described controller is also connected with the control end of the power switch of described electromagnetic heater, and one end of described power switch is connected with the other end of described each resonance coil, the other end ground connection of described power switch.
8. control circuit as claimed in claim 2, is characterized in that, also comprises:
Zero passage detection module for detection of the zero cross signal of described electric main, one end of described zero passage detection module is connected between the output of rectification module and one end of described choking-winding of described electromagnetic heater, the other end of described zero passage detection module is connected with described controller, the input of described rectification module is connected with described electric main, and described controller is controlled described selector switch according to described zero cross signal and switched.
9. control circuit as claimed in claim 2, is characterized in that, also comprises:
Zero passage detection module for detection of the zero cross signal of described electric main, one end of described zero passage detection module is connected to the input of described electric main, the other end of described zero passage detection module is connected with described controller, and described controller is controlled described selector switch according to described zero cross signal and switched.
10. an electromagnetic heater, is characterized in that, comprises the control circuit as described in claim 1-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320414317.0U CN203457343U (en) | 2013-07-11 | 2013-07-11 | Electromagnetic heating device and control circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320414317.0U CN203457343U (en) | 2013-07-11 | 2013-07-11 | Electromagnetic heating device and control circuit thereof |
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| Publication Number | Publication Date |
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| CN203457343U true CN203457343U (en) | 2014-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320414317.0U Expired - Fee Related CN203457343U (en) | 2013-07-11 | 2013-07-11 | Electromagnetic heating device and control circuit thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104284466A (en) * | 2013-07-11 | 2015-01-14 | 美的集团股份有限公司 | Intelligent control circuit of multiple electromagnetic heating units |
| CN106879095A (en) * | 2015-12-11 | 2017-06-20 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its heating control circuit |
| EP3133899A4 (en) * | 2014-04-16 | 2017-12-13 | Mitsubishi Electric Corporation | Induction cooker and method for controlling same |
-
2013
- 2013-07-11 CN CN201320414317.0U patent/CN203457343U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104284466A (en) * | 2013-07-11 | 2015-01-14 | 美的集团股份有限公司 | Intelligent control circuit of multiple electromagnetic heating units |
| CN104284466B (en) * | 2013-07-11 | 2016-05-11 | 美的集团股份有限公司 | The control circuit of many Electromagnetic Heatings of intelligence unit |
| EP3133899A4 (en) * | 2014-04-16 | 2017-12-13 | Mitsubishi Electric Corporation | Induction cooker and method for controlling same |
| CN106879095A (en) * | 2015-12-11 | 2017-06-20 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its heating control circuit |
| CN106879095B (en) * | 2015-12-11 | 2023-03-21 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device and heating control circuit thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 Termination date: 20210711 |
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| CF01 | Termination of patent right due to non-payment of annual fee |