CN109219176A - A kind of electromagnetic heating system and its control method of electromagnetic oven - Google Patents
A kind of electromagnetic heating system and its control method of electromagnetic oven Download PDFInfo
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims description 15
- 238000001514 detection method Methods 0.000 claims abstract description 29
- 210000004899 c-terminal region Anatomy 0.000 claims abstract description 4
- 239000000956 alloy Substances 0.000 claims description 58
- 229910045601 alloy Inorganic materials 0.000 claims description 43
- 239000003990 capacitor Substances 0.000 claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 229910000889 permalloy Inorganic materials 0.000 claims description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 230000005291 magnetic effect Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 2
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 2
- 229910001004 magnetic alloy Inorganic materials 0.000 claims description 2
- 229910016028 MoTiAl Inorganic materials 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002902 ferrimagnetic material Substances 0.000 description 2
- 230000005307 ferromagnetism Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229910001374 Invar Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000010259 detection of temperature stimulus Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- -1 that is Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
Abstract
The present invention relates to a kind of electromagnetic heating systems of electromagnetic oven, including the first rectifier, electromagnetic heating module, IGBT, IGBT drive module, current detection module and control module, wherein: the rectifier DB1 input terminal is connect with power interface, the connection of the input terminal of one output end and electromagnetic heating module, the output end of the electromagnetic heating module and the C-terminal of IGBT connect, the end E of IGBT and the input terminal of current detection module connect, the end G of IGBT is connect with IGBT drive module, the output end ground connection of the current detection module connect with the another output of reorganizer DB1 simultaneously, the control module is connect with current detection module.The present invention accurately controls heating temperature by the current value of electromagnetic heating coil in detection electromagnetic heating module.
Description
Technical field
The present invention relates to technical field of kitchen wares, relate to more particularly, to a kind of electromagnetic heating system of electromagnetic oven, while also
And a kind of control method of electromagnetic oven electromagnetic heating system.
Background technique
Cooking apparatus such as electromagnetic oven etc. has been widely used in family, and electromagnetic oven structure generally comprises shell, set on outer
Panel on shell and the electromagnetic heating coil between shell and panel and control circuit board, the electricity of this ordinary construction
Magnetic furnace is sufficient for the needs of heating, and after electromagnetic oven is opened, electromagnetic heating coil is powered and generates heat, is passed to by panel
Utensil to be heated, such as cookware etc..
But common electromagnetic oven cannot achieve the control to temperature, will always be in heated condition after opening electromagnetic oven,
It can not be by heating and temperature control in a reasonable range, for this purpose, being provided with temperature sensor, the temperature on some electromagnetic ovens
Degree sensor is generally located on close to the position of panel, be can detecte panel temperature by temperature sensor, is then passed through circuit
Although control, in a certain range by panel temperature control, this method can be realized the control to temperature, but still exist very
It is mostly insufficient, for example, temperature sensor has certain hysteresis quality to the detection of temperature, therefore, to the control precision of temperature compared with
It is low.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, and realization temperature control can be facilitated by providing one kind
The electromagnetic oven electromagnetic heating system of system.
The control method for realizing electromagnetic oven electromagnetic heating can be facilitated the present invention also provides one kind.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is that:
The present invention relates to a kind of electromagnetic heating systems, including the first rectifier, electromagnetic heating module, IGBT, IGBT driving
Module, current detection module and control module, in which: the rectifier DB1 input terminal is connect with power interface, an output end
It is connect with the input terminal of electromagnetic heating module, the output end of the electromagnetic heating module and the C-terminal of IGBT connect, the end E of IGBT
It is connect with the input terminal of current detection module, the end G of IGBT is connect with IGBT drive module, the output of the current detection module
End ground connection connect with the another output of reorganizer DB1 simultaneously, and the control module is connect with current detection module.
The electromagnetic heating module includes electromagnetic heating coil and capacitor C2 in parallel.
The current detection module includes that one end of resistance R1 and capacitor C1, the resistance R1 and the end E of IGBT connect, separately
One end ground connection connect with the output end of rectifier DB1 simultaneously, and the capacitor C1 is in parallel with resistance R1, one end of capacitor C1 and IGBT
The end E connect and connect with control module, the other end be grounded and meanwhile is connect with the output end of rectifier DB1.
The current detection module includes Current Transmit, rectifier DB2, resistance R1 and capacitor C1, current transformer
The pole E of the first input end of CT and IGBT connect, and the second input end grounding and connect with reorganizer DB1, the first of rectifier DB2
The connection of first output end of input terminal and current transformer, the second of the second input terminal of rectifier DB2 and Current Transmit
Output end connection, one end of resistance R1 are connect with the first output end of rectifier DB2, the other end and rectifier DB2 of resistance R1
Second output terminal connection, one end of capacitor C1 connect with one end of resistance R1 and connect with control module, the capacitor C1 other end
Ground connection connect with the other end of resistance R1.
Preferably, the electromagnetic heating module includes the temperature control for capableing of electromagnetic signal caused by inductive electromagnetic heating coil
Layer.The temperature control layer is usually that ferromagnetism or ferrimagnetic material are made, for example permalloy, Precise Alloy, magnetic conductivity exist
When curie point, meeting bust to zero or near zero, the magnetic conductivity of the temperature control layer is 2000~200000H/m, the resistance of temperature control layer
Rate is 30~130 μ Ω cm.
Preferably, the temperature control layer is set to the top of electromagnetic heating module.Specifically, the electromagnetic oven includes panel,
The temperature control layer is set on panel, alternatively, being equipped with cookware above the electromagnetic oven, the temperature control layer is set on cookware.
Preferably, the temperature control layer is made of permalloy material or Precise Alloy material.
Preferably, the Curie-point temperature of the permalloy material or Precise Alloy material is Celsius at 30 degrees Celsius to 500
Between degree.Preferably between 70 degrees Celsius to 400 degrees Celsius, further preferably between 180 degrees Celsius to 350 degrees Celsius.When
When temperature control layer temperature reaches temperature control layer curie point, by bust to close to zero, temperature will top out temperature control layer magnetic conductivity.
Further, the Precise Alloy material is material of the Curie-point temperature between 180 degrees Celsius to 230 degrees Celsius
Material.Such as (the triumphant metallurgy in Shanghai belongs to by Precise Alloy 4J36 (the triumphant metallurgical metal products Co., Ltd production in Shanghai) or Precise Alloy 4J32
Products Co., Ltd's production).Precise Alloy 4J36 is a kind of special low bulk iron-nickel alloy with super-low expansion coefficient,
Curie point is 230 degrees Celsius；Precise Alloy 4J32 alloy is also known as super invar (Super-Invar) alloy, and Curie-point temperature is
220 degrees Celsius.
Through research verify, can be suitable for this patent Precise Alloy material be preferably standard No. be GB/T15018-94,
Following alloy material cited by YB/T5239-2005, YB/T5262-93, YB/T5254-2011, wherein standard No. GB/
T15018-94 refers to " National Standard of the People's Republic of China's Precise Alloy trade mark ", standard No. YB/T5254-2011 refer to " in
Magnificent people's republic's iron and steel industry professional standard ".
| Types of alloys | Alloy designations | Curie point |
| Ferromanganese | 4J59 | 70 |
| Constant modulus alloy | 3J53 | 110 |
| Constant modulus alloy | 3J53Y | 110 |
| Elastic alloy | Ni44MoTiAl | 120 |
| Constant modulus alloy | 3J58 | 130 |
| Elastic alloy | 3J54 | 130 |
| Elastic alloy | 3J58 | 130 |
| Elastic alloy | 3J59 | 150 |
| Amorphous soft magnetic alloy | (FeNiCo)78(SiB)22 | 150 |
| Elastic alloy | 3J53 | 155 |
| Elastic alloy | 3J61 | 160 |
| Elastic alloy | 3J62 | 165 |
| Precise Alloy | 4J36 | 230 |
| Precise Alloy | 4J32 | 220 |
The chemical component of elastic alloy 3J53 includes: in table
C element content is not more than 0.05%；
The content of S element is not more than 0.020%；
The content of P element is not more than 0.020%；
The content of Mn element is not more than 0.80%；
The content of Si element is not more than 0.80%；
The content of Ni element is 41.5%~43.0%；
The content of Cr element is 5.2%~5.8%；
The content of Ti element is 2.3%~2.7%；
The content of Al element is 0.5%~0.8%；
Surplus is Fe element.
The chemical component of elastic alloy 3J58 includes:
C element content is not more than 0.05%；
The content of S element is not more than 0.020%；
The content of P element is not more than 0.020%；
The content of Mn element is not more than 0.80%；
The content of Si element is not more than 0.80%；
The content of Ni element is 43.0%~43.6%；
The content of Cr element is 5.2%~5.6%；
The content of Ti element is 2.3%~2.7%；
The content of Al element is 0.5%~0.8%；
Surplus is Fe element.
The chemical component of Precise Alloy 4J32 includes:
C element content is not more than 0.05%；
The content of S element is not more than 0.020%；
The content of P element is not more than 0.020%；
The content of Mn element is 0.20%~0.60%；
The content of Si element is not more than 0.20%；
The content of Ni element is 31.5%~33.0%；
The content of Co element is 3.2%~4.2%；
The content of Cu element is 0.4%~0.8%；
Surplus is Fe element.
The chemical component of Precise Alloy 4J36 includes:
C element content is not more than 0.05%；
The content of S element is not more than 0.020%；
The content of P element is not more than 0.020%；
The content of Mn element is 0.20%~0.60%；
The content of Si element is not more than 0.30%；
The content of Ni element is 35.0%~37.0%；
Surplus is Fe element.
The above alloy material can provide or pass through other public sale canals by the triumphant metallurgical metal products Co., Ltd production in Shanghai
Road obtains.
In addition to this, the content of iron is 35~70% in the permalloy, the content 30~65% of nickel.
The content of iron is 35~70% in permalloy, the content 30~65% of nickel.
The present invention also provides a kind of electromagnetic heating control method, above-mentioned electromagnetic heating system is provided first, and including
Following steps:
S1 set expected heating temperature value or or current value corresponding with temperature value, be denoted as T0；Due to the effect in temperature control
Under, there are specific corresponding relationship between temperature value and current value, a certain temperature value corresponds to specific current value, similarly, a certain
Current value also corresponds to specific temperature value, therefore, temperature value and current value there are equivalent replacement relationship, no matter set temperature value also
It is current value, can be finally reflected on temperature value；
S2 control module controls electromagnetic heating coil heating, and heats to temperature control layer；
S3 current detection module detects the current parameters value in electromagnetic heating coil, is denoted as I1,
S4 is by I1It is transformed into corresponding temperature value, is denoted as T1, by T1With T0+ Δ t is compared, and works as T1< T0When+Δ t, control
Molding block control electromagnetic heating coil continues to heat, and works as T1≥T0When+Δ t, electromagnetic heating coil stops heating or reduces heating function
Rate；Or
By T0It is transformed into corresponding current value, is denoted as I0, by I1With I0+ Δ i is compared, and works as I1With I0+ Δ i is unequal
When, the heating power of control module control electromagnetic heating coil or heating time are until I1With I0+ Δ i is equal.
The T0For threshold value, i.e. T0=[TIt is low-TIt is high], in step S4, work as T1< TIt is lowWhen+Δ t, control module control electromagnetism adds
Heat coil continues to heat, and works as T1≥TIt is highWhen+Δ t, electromagnetic heating coil stops heating or reduces heating power.
Preferably, 0≤Δ i≤0.7A, 0≤Δ t≤7 DEG C.
The present invention utilizes the physical characteristic of temperature control layer, makes the current value of electromagnetic heating coil and temperature control layer temperature value is formed pair
It should be related to, and then utilize this corresponding relationship, by detecting current control heating temperature, this control method has higher inspection
Precision is surveyed, temperature controlled accuracy is improved.
Compared with prior art, the beneficial effects of the present invention are:
The present invention, as the foundation for judging temperature level, eliminates temperature by the current value in detection electromagnetic heating coil
The additional components such as sensor are spent, in addition, the control method can be used cooperatively together with temperature control layer, temperature control layer and electromagnetic heating line
Circle can mutual induction, the electrical parameter values in electromagnetic heating coil more can accurately react the temperature of temperature control layer at this time, also
It is to say, the electrical parameter variation by detecting electromagnetic heating coil can accurately detect the heating temperature value of testee, thus
The accurate control to temperature may be implemented.
Temperature control layer material of this patent it is preferable to use Curie-point temperature between 30 degrees Celsius to 500 degrees Celsius, Neng Goujin
One step realizes the control to temperature control layer temperature in 30 degrees Celsius to 500 degree Celsius ranges, and this control method changes tradition
Manual control mode, realize temperature automatically controlled effect.
Detailed description of the invention
Fig. 1 is the electrical block diagram of the embodiment of the present invention 1；
Fig. 2 is the electrical block diagram of the embodiment of the present invention 2.
Fig. 3, Fig. 4 are electromagnetic heating coil operating current and temperature control layer vs. temperature schematic diagram.
Specific embodiment
The present invention is further illustrated With reference to embodiment.Wherein, attached drawing only for illustration,
What is indicated is only schematic diagram, rather than pictorial diagram, should not be understood as the limitation to this patent；Reality in order to better illustrate the present invention
Example is applied, the certain components of attached drawing have omission, zoom in or out, and do not represent the size of actual product；To those skilled in the art
For, the omitting of some known structures and their instructions in the attached drawings are understandable.
The same or similar label correspond to the same or similar components in the attached drawing of the embodiment of the present invention；It is retouched in of the invention
In stating, it is to be understood that if the orientation or positional relationship for having the instructions such as term " on ", "lower", "left", "right" is based on attached drawing
Shown in orientation or positional relationship, be merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion is signified
Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore positional relationship is described in attached drawing
Term only for illustration, should not be understood as the limitation to this patent, for the ordinary skill in the art, can
To understand the concrete meaning of above-mentioned term as the case may be.
Embodiment 1
As shown in Figure 1, the present invention relates to a kind of electromagnetic heating system of electromagnetic oven, including the first rectifier, electromagnetic heating
Module, IGBT, IGBT drive module, current detection module and control module, in which: the rectifier DB1 input terminal and power supply
The input terminal of interface connection, an output end and electromagnetic heating module connects, the output end and IGBT of the electromagnetic heating module
C-terminal connection, the input terminal of the end E of IGBT and current detection module connects, and the end G of IGBT is connect with IGBT drive module, institute
It states the output end ground connection of current detection module while being connect with the another output of reorganizer DB1, the control module and electricity
Flow detection module connection.
The electromagnetic heating module includes electromagnetic heating coil and capacitor C2 in parallel.
The current detection module includes that one end of resistance R1 and capacitor C1, the resistance R1 and the end E of IGBT connect, separately
One end ground connection connect with the output end of rectifier DB1 simultaneously, and the capacitor C1 is in parallel with resistance R1, one end of capacitor C1 and IGBT
The end E connect and connect with control module, the other end be grounded and meanwhile is connect with the output end of rectifier DB1.
The electromagnetic heating system of the electromagnetic oven further includes being capable of electromagnetic signal caused by inductive electromagnetic heating coil
Temperature control layer, the temperature control layer are set to the top of electromagnetic heating coil, and specifically, the temperature control layer can both be set to electromagnetic oven
On panel, the panel is set to the top of electromagnetic heating coil, and the temperature control layer can also be set on cookware, such as the bottom of a pan or pot
With, when needing to heat, the cookware is put on electromagnetic oven panel.
The temperature control layer is made of ferromagnetism or ferrimagnetic material, for example permalloy, Precise Alloy, magnetic conductivity exist
When curie point, meeting bust to zero or near zero, so-called permalloy, that is, iron-nickel alloy.The magnetic conductivity of the temperature control layer be 2000~
200000H/m, the resistivity of temperature control layer are 30~130 μ Ω cm.
For the present embodiment, which is preferably that (the triumphant metallurgical metal products in Shanghai are limited by Precise Alloy 4J36
Company's production) or Precise Alloy 4J32 (the triumphant metallurgical metal products Co., Ltd production in Shanghai), the temperature control thickness degree is preferably 0.1
To 3 millimeters, the present embodiment is 1.5 millimeters.When temperature control layer is set on cookware, the temperature control layer both can be made cookware entirety,
The a part that can also be used as cookware makes it be combined with each other with cookware main body by the methods of riveting, welding, meltallizing, printing.
When temperature control layer is set on electromagnetic oven panel, the temperature control layer can both be located at panel upper surface, can also be located at panel following table
Face, when panel is composite structure, the temperature control layer can also be set between panel upper and lower surfaces.
The present embodiment it is preferable to use permalloy or the Curie-point temperature of Precise Alloy material taken the photograph at 30 degrees Celsius to 500
Precise Alloy material between family name's degree, further preferred Curie-point temperature is between 70 degrees Celsius to 400 degrees Celsius or 150 is Celsius
The Precise Alloy material between 350 degrees Celsius is spent, for the type of Precise Alloy material, this implementation is closed it is preferable to use following
Golden material:
Temperature control layer, can also be by powdered or granular Precise Alloy material or permalloy material other than laminated structure
Material is made, and is attached on panel, i.e., Precise Alloy material or permalloy material is fabricated to powdered or graininess, then
It is compounded on panel by prior art.
So-called permalloy is also known as iron-nickel alloy, and wherein the content of iron is 35~70%, further preferably 63~67%,
The content 30~65% of nickel, further preferably 37~58%.Iron-nickel alloy has high magnetic permeability, and understands bust extremely in curie point
Close to space permeability.
Embodiment 2
The present embodiment changes the setting of current detection module on the basis of embodiment 1, as shown in Fig. 2, the present embodiment
In current detection module include Current Transmit, rectifier DB2, resistance R1 and capacitor C1, the first of Current Transmit
The connection of the pole E of input terminal and IGBT, the second input end grounding and connect with reorganizer DB1, the first input end of rectifier DB2 and
First output end of current transformer connects, and the second input terminal of rectifier DB2 and the second output terminal of Current Transmit connect
It connects, one end of resistance R1 is connect with the first output end of rectifier DB2, and the second of the other end of resistance R1 and rectifier DB2 is defeated
Outlet connection, one end of capacitor C1 connect with one end of resistance R1 and connect with control module, capacitor C1 other end ground connection and electricity
Hinder the other end connection of R1.
Embodiment 3
The present embodiment on the basis of Examples 1 and 2,
A kind of electromagnetic heating control method, on the basis of embodiment 1,2 electromagnetic heating system are provided, further include as
Lower step:
S1 set expected heating temperature value or or current value corresponding with temperature value, be denoted as T0；Due to the effect in temperature control
Under, there are specific corresponding relationships between temperature value and current value, and as shown in Figure 3,4, a certain temperature value corresponds to specific electric current
Value, similarly, a certain current value also corresponds to specific temperature value, therefore, temperature value and current value there are equivalent replacement relationship, no matter
Set temperature value or current value can be finally reflected on temperature value；
S2 control module controls electromagnetic heating coil heating, and heats to temperature control layer；
S3 current detection module detects the current parameters value in electromagnetic heating coil, is denoted as I1,
S4 is by I1It is transformed into corresponding temperature value, is denoted as T1, by T1With T0+ Δ t is compared, and works as T1< T0When+Δ t, control
Molding block control electromagnetic heating coil continues to heat, and works as T1≥T0When+Δ t, electromagnetic heating coil stops heating or reduces heating function
Rate；Or
By T0It is transformed into corresponding current value, is denoted as I0, by I1With I0+ Δ i is compared, and works as I1With I0+ Δ i is unequal
When, the heating power of control module control electromagnetic heating coil or heating time are until I1With I0+ Δ i is equal.
Preferably, the T0For threshold value, i.e. T0=[TIt is low-TIt is high], in step S4, work as T1< TIt is lowWhen+Δ t, control module control
Electromagnetic heating coil continues to heat, and works as T1≥TIt is highWhen+Δ t, electromagnetic heating coil stops heating or reduces heating power.Similarly,
The current value may be threshold value, and specifically, after electromagnetic stove work, electromagnetic heating coil starts to work and generates electromagnetism letter
Number, start to heat temperature control layer at the same time, the electromagnetic signal and temperature control layer are acted on and are lost by temperature control layer and decay, electricity
Electric current in magnetic heating coil changes with the variation of temperature control layer temperature, and forms specific corresponding relationship.Current detection module inspection
It measures the electric current in electromagnetic heating coil and is transferred to control module, control module is by the detected value of electric current and electric current initially set
Value or setting temperature value corresponding to current value be compared, when the current value detected be greater than maximum value initially set or
When less than minimum value initially set, control module will control electromagnetic heating by pwm signal by controlling IGBT drive module
The size of current of coil is located between the highest and lowest value of setting, when the electrical parameter detected is in the highest and most of setting
When between low value, the heating power of electromagnetic heating coil or heating time can remain unchanged or finely tune in a certain range.
Preferably, 0≤Δ i≤0.7A, 0≤Δ t≤7 DEG C.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (14)
1. a kind of electromagnetic heating system of electromagnetic oven, including the first rectifier, electromagnetic heating module, IGBT, IGBT drive module,
Current detection module and control module, in which:
The rectifier DB1 input terminal is connect with power interface, the input terminal connection of an output end and electromagnetic heating module, institute
The C-terminal of the output end and IGBT of stating electromagnetic heating module connects, and the end E of IGBT and the input terminal of current detection module connect,
The end G of IGBT is connect with IGBT drive module, and the output end ground connection of the current detection module is another with reorganizer DB1 simultaneously
A output end connection, the control module are connect with current detection module.
2. electromagnetic heating system according to claim 1, which is characterized in that the electromagnetic heating module includes electricity in parallel
Magnetic heating coil and capacitor C2.
3. electromagnetic heating system according to claim 1, which is characterized in that the current detection module include resistance R1 and
One end of capacitor C1, the resistance R1 and the end E of IGBT connect, and other end ground connection connect with the output end of rectifier DB1 simultaneously,
The capacitor C1 is in parallel with resistance R1, and one end of capacitor C1 and the end E of IGBT connect and connect with control module, other end ground connection
It is connect simultaneously with the output end of rectifier DB1.
4. electromagnetic heating system according to claim 1, which is characterized in that the current detection module includes Current Mutual Inductance
Device CT, rectifier DB2, resistance R1 and capacitor C1, the first input end of Current Transmit and the pole E of IGBT connect, and second is defeated
Entering end ground connection and is connect with reorganizer DB1, the first input end of rectifier DB2 and the first output end of current transformer connect,
The second input terminal of rectifier DB2 and the second output terminal of Current Transmit connect, and one end of resistance R1 is with rectifier DB2's
The connection of first output end, the other end of resistance R1 are connect with the second output terminal of rectifier DB2, one end of capacitor C1 and resistance R1
One end connection and connect with control module, the capacitor C1 other end be grounded connect with the other end of resistance R1.
5. electromagnetic heating system according to any one of claims 1 to 4, which is characterized in that the electromagnetic heating module it is upper
Side or side are additionally provided with the temperature control layer that can incude the electromagnetic signal that the electromagnetic heating module generates.
6. electromagnetic heating system according to claim 5, which is characterized in that the top or side of the electromagnetic heating module
It is additionally provided with panel, the panel is made of temperature control layer, alternatively, the temperature control layer forms a part of panel and is compound in panel
In.
7. electromagnetic heating system according to claim 5, which is characterized in that be additionally provided with pot above the electromagnetic heating system
Tool, the temperature control layer are set on cookware.
8. electromagnetic heating system according to claim 5, which is characterized in that the temperature control layer is by permalloy material or essence
Close alloy material is made.
9. electromagnetic heating system according to claim 8, which is characterized in that the permalloy material or Precise Alloy material
The Curie-point temperature of material is between 30 degrees Celsius to 500 degrees Celsius.
10. electromagnetic heating system according to claim 8, which is characterized in that the Precise Alloy material is Precise Alloy
4J36, Precise Alloy 4J32, ferromanganese 4J59, constant modulus alloy 3J53, constant modulus alloy 3J53Y, constant modulus alloy 3J58,
Elastic alloy 3J54, elastic alloy 3J58, elastic alloy 3J59, elastic alloy 3J53, elastic alloy 3J61, elastic alloy
3J62, elastic alloy Ni44MoTiAl, Precise Alloy 4J36, Precise Alloy 4J32 or amorphous soft magnetic alloy (FeNiCo)78
(SiB)22。
11. electromagnetic heating system according to claim 8, which is characterized in that the content of iron is 35 in the permalloy
~70%, the content 30~65% of nickel.
12. a kind of electromagnetic heating control method, which is characterized in that provide claim 5 to 11 any electromagnetic heating system
System, and include the following steps:
S1 sets expected heating temperature value or current value corresponding with temperature value, is denoted as T0；
S2 control module controls electromagnetic heating coil heating, and heats to temperature control layer；
S3 current detection module detects the current parameters value in electromagnetic heating coil, is denoted as I1,
S4 is by I1It is transformed into corresponding temperature value, is denoted as T1, by T1With T0+ Δ t is compared, and works as T1< T0When+Δ t, control
Module control electromagnetic heating coil continues to heat, and works as T1≥ T0When+Δ t, electromagnetic heating coil stops heating or reduces heating function
Rate；Or
By T0It is transformed into corresponding current value, is denoted as I0, by I1With I0+ Δ i is compared, and works as I1With I0When+Δ i is unequal, control
The heating power of molding block control electromagnetic heating coil or heating time are until I1With I0+ Δ i is equal.
13. control method according to claim 12, which is characterized in that the T0For threshold value, i.e. T0=[TIt is low-TIt is high], step
In S4, work as T1< TIt is lowWhen+Δ t, control module control electromagnetic heating coil continues to heat, and works as T1≥ TIt is highWhen+Δ t, electromagnetic heating
Coil stops heating or reduces heating power.
14. control method according to claim 12, which is characterized in that 0≤Δ i≤0.7A, 0≤Δ t≤7 DEG C.
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