CN109982466A - Electromagnetic heating apparatus and its heating control apparatus and method - Google Patents
Electromagnetic heating apparatus and its heating control apparatus and method Download PDFInfo
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- CN109982466A CN109982466A CN201711447844.0A CN201711447844A CN109982466A CN 109982466 A CN109982466 A CN 109982466A CN 201711447844 A CN201711447844 A CN 201711447844A CN 109982466 A CN109982466 A CN 109982466A
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- resonance coil
- comparator
- electromagnetic heating
- power switch
- voltage
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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
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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
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/12—Cooking devices
- H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
- H05B6/1245—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements
Abstract
The invention discloses a kind of electromagnetic heating apparatus and its heating control apparatus and method, device includes: that resonance modules include resonance coil, resonant capacitance and power switch tube；The first input end of synchronized sampling circuit is connected with the first end of resonance coil, second input terminal of synchronized sampling circuit is connected with the second end of resonance coil, and enable signal is opened in the second voltage generation that synchronized sampling circuit is used for the second end of the first voltage and resonance coil according to the first end of resonance coil；Control unit is connected with the control electrode of the output end of synchronized sampling circuit and power switch tube respectively, control unit is used to obtain the current power gear of electromagnetic heating apparatus, obtain the corresponding delay time of current power gear, and receive open enable signal after the control power switch tube after corresponding delay time that is delayed it is open-minded, to solve the problems, such as that different capacity gear has an impact the working condition of power switch tube, the loss of power switch tube is effectively reduced.
Description
Technical field
The present invention relates to cooking equipment technical field, in particular to a kind of heating control apparatus of electromagnetic heating apparatus, one
Kind electromagnetic heating apparatus and a kind of method for heating and controlling of electromagnetic heating apparatus.
Background technique
Electromagnetic heating apparatus in the related technology usually controls IGBT's by the variation of detection coil disk both end voltage
It is open-minded, wherein under different power situations, the concussion that LC concussion generates between the pole C and the pole E of IGBT after IGBT shutdown is electric
Pressure and voltage change ratio are different.But the relevant technologies the problem is that, when electromagnetic heating apparatus work in low-power,
The C pole tension of IGBT has not degraded to 0 when coil panel both end voltage changes, and conducting electric current increases during causing IGBT to open
Greatly, IGBT loss increases；When electromagnetic heating apparatus work is in high power, the C pole tension of IGBT has descended to 0, but line
Disk both end voltage variation lag is enclosed, causes IGBT open signal lag generation negative current to flow through the diode in IGBT, causes
Diode losses increase.
Therefore, there are improved needs for electromagnetic heating apparatus in the related technology.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to propose a kind of heating control apparatus of electromagnetic heating apparatus, is able to solve different capacity gear to power switch
The problem of working condition of pipe has an impact.
It is another object of the present invention to propose a kind of electromagnetic heating apparatus.
Yet another object of the invention is that proposing a kind of control method of electromagnetic heating apparatus.
In order to achieve the above objectives, the heating control apparatus for the electromagnetic heating apparatus that one aspect of the present invention embodiment proposes, packet
Include: resonance modules, the resonance modules include resonance coil, resonant capacitance and power switch tube；Synchronized sampling circuit, it is described same
The first input end of step sample circuit is connected with the first end of the resonance coil, the second input terminal of the synchronized sampling circuit
It is connected with the second end of the resonance coil, the synchronized sampling circuit is used for first of the first end according to the resonance coil
Enable signal is opened in the second voltage generation of the second end of voltage and the resonance coil；Control unit, described control unit point
It is not connected with the control electrode of the output end of the synchronized sampling circuit and the power switch tube, described control unit is for obtaining
The current power gear of the electromagnetic heating apparatus obtains the corresponding delay time of the current power gear, and is receiving
It is described to open that control the power switch tube after the corresponding delay time that is delayed after enable signal open-minded.
The heating control apparatus of the electromagnetic heating apparatus proposed according to embodiments of the present invention, synchronized sampling circuit is according to resonance
Enable signal is opened in the second voltage generation of the second end of the first voltage and resonance coil of the first end of coil, and control unit obtains
The current power gear of electromagnetic heating apparatus is taken, obtains the corresponding delay time of current power gear, and make receiving to open
The control power switch tube after corresponding delay time that can be delayed after signal is open-minded.The computer heating control of the embodiment of the present invention as a result,
Device can open delay time according to power gear adjustment power switch tube, open to solve different capacity gear power
The problem of working condition of pass pipe has an impact, is effectively reduced the loss of power switch tube.
According to one embodiment of present invention, the first end of the resonance coil can be with the rectification of the electromagnetic heating apparatus
Filter module is connected, and the second end of the resonance coil is connected with the collector of the power switch tube, the power switch tube
Emitter ground connection, wherein the synchronized sampling circuit the resonance coil both ends voltage by first voltage less than second
Voltage change is to generate described to open enable signal when first voltage is greater than second voltage.
According to one embodiment of present invention, the synchronized sampling circuit can include: the first partial pressure unit, described first point
The input terminal of pressure unit is connected with the first end of the resonance coil；Second partial pressure unit, the input of second partial pressure unit
End is connected with the second end of the resonance coil；Comparator, the first end of the comparator are defeated with first partial pressure unit
Outlet is connected, and the second end of the comparator is connected with the output end of second partial pressure unit, the output end of the comparator
It is connected with described control unit.
According to one embodiment of present invention, when the first end of the comparator can be normal phase input end and the comparator
Second end when being inverting input terminal the enable signal of opening be rising edge；When the first end of the comparator can also be reverse phase
The second end of input terminal and the comparator when being normal phase input end the enable signal of opening be failing edge.
According to one embodiment of present invention, described control unit can be also used to obtain the current power gear corresponding
Service time, and after the power switch tube opens corresponding service time, control the power switch tube shutdown.
In order to achieve the above objectives, a kind of electromagnetic heating apparatus that another aspect of the present invention embodiment proposes, including described
The heating control apparatus of electromagnetic heating apparatus.
The electromagnetic heating apparatus proposed according to embodiments of the present invention passes through the heating control apparatus of electromagnetic heating apparatus, energy
It is enough that delay time is opened according to power gear adjustment power switch tube, to solve different capacity gear to power switch plumber
The loss of power switch tube is effectively reduced in the problem of having an impact as state.
According to one embodiment of present invention, the electromagnetic heating apparatus may include electromagnetic oven, prevention electromagnetic pressure cooker, electromagnetism electricity
Rice cooker or electromagnetic stove.
In order to achieve the above objectives, a kind of computer heating control side for electromagnetic heating apparatus that another aspect of the invention embodiment proposes
Method, the electromagnetic heating apparatus include resonance modules and synchronized sampling circuit, and the resonance modules include resonance coil, resonance electricity
Hold and power switch tube, the first input end of the synchronized sampling circuit are connected with the first end of the resonance coil, it is described same
Second input terminal of step sample circuit is connected with the second end of the resonance coil, the described method comprises the following steps: obtaining institute
State the current power gear of electromagnetic heating apparatus；Obtain the corresponding delay time of the current power gear；When described synchronize is adopted
Sample circuit is generated according to the second voltage of the first voltage of the first end of the resonance coil and the second end of the resonance coil
It is open-minded that the power switch tube is controlled after opening enable signal, after the corresponding delay time that is delayed.
The method for heating and controlling of the electromagnetic heating apparatus proposed according to embodiments of the present invention, by obtaining electromagnetic heating apparatus
Current power gear, the corresponding delay time of current power gear is obtained, when synchronized sampling circuit is according to the of resonance coil
After enable signal is opened in the second voltage generation of the second end of the first voltage and resonance coil of one end, be delayed corresponding delay
It is open-minded that power switch tube is controlled after time.The control method of the embodiment of the present invention as a result, can adjust power according to power gear
Switching tube opens delay time, asks to solve different capacity gear what the working condition of power switch tube had an impact
Topic, is effectively reduced the loss of power switch tube.
According to one embodiment of present invention, the first end of the resonance coil can be with the rectification of the electromagnetic heating apparatus
Filter module is connected, and the second end of the resonance coil is connected with the collector of the power switch tube, the power switch tube
Emitter ground connection, wherein the synchronized sampling circuit the resonance coil both ends voltage by first voltage less than second
Voltage change is to generate described to open enable signal when first voltage is greater than second voltage.
According to one embodiment of present invention, the synchronized sampling circuit may include the first partial pressure unit, the second partial pressure list
Member and comparator, the input terminal of first partial pressure unit are connected with the first end of the resonance coil, and second partial pressure is single
The input terminal of member is connected with the second end of the resonance coil, and the first end of the comparator is defeated with first partial pressure unit
Outlet is connected, and the second end of the comparator is connected with the output end of second partial pressure unit, wherein when the comparator
First end is the second end of normal phase input end and the comparator when being inverting input terminal, described to open enable signal to rise
Edge；It is described to open when the second end that the first end of the comparator is inverting input terminal and the comparator is normal phase input end
Logical enable signal is failing edge.
According to one embodiment of present invention, the method for heating and controlling of electromagnetic heating apparatus can further include: works as described in acquisition
Preceding power gear corresponding service time；After the power switch tube opens corresponding service time, controls the power and open
Close pipe shutdown.
Detailed description of the invention
Fig. 1 is the block diagram according to the heating control apparatus of the electromagnetic heating apparatus of the embodiment of the present invention；
Fig. 2 is the block diagram according to the heating control apparatus of the electromagnetic heating apparatus of one embodiment of the invention；
Fig. 3 is the circuit diagram according to the heating control apparatus of the electromagnetic heating apparatus of one embodiment of the invention；
Fig. 4 is the block diagram according to the electromagnetic heating apparatus of the embodiment of the present invention；
Fig. 5 is the flow chart according to the method for heating and controlling of the electromagnetic heating apparatus of the embodiment of the present invention；
Fig. 6 is the flow chart according to the acquisition delay time of one specific embodiment of the present invention；And
Fig. 7 is the flow chart that control method is opened according to the power switch tube of a specific embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings heating control apparatus, the electromagnetic heating apparatus of the electromagnetic heating apparatus of the embodiment of the present invention are described
With the method for heating and controlling of electromagnetic heating apparatus.
Fig. 1 is the block diagram according to the heating control apparatus of the electromagnetic heating apparatus of the embodiment of the present invention.Such as Fig. 1 and
Shown in Fig. 3, the heating control apparatus of the electromagnetic heating apparatus of the embodiment of the present invention, comprising: resonance modules 10, synchronized sampling circuit
20 and control unit 30.
Wherein, resonance modules 10 include resonance coil L2, resonant capacitance C3 and power switch tube H1, and according to the present invention one
A specific embodiment, as shown in figure 3, resonance coil L2 can be connected in parallel with resonant capacitance C3, power switch tube H1 can be IGBT
(Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) pipe.
The first end 1b of the first input end 1a and resonance coil L2 of synchronized sampling circuit 20 are connected, synchronized sampling circuit 20
The second input terminal 2a be connected with the second end 2b of resonance coil L2, synchronized sampling circuit 20 is used for the according to resonance coil L2
Enable signal is opened in the second voltage Vb generation of the second end 2b of the first voltage Va and resonance coil L2 of one end 1b.
Control unit 30 is connected with the control electrode G of the output end of synchronized sampling circuit 20 and power switch tube H1 respectively, control
Unit 30 processed is used to obtain the current power gear POWER of electromagnetic heating apparatus, obtains that current power gear POWER is corresponding to be prolonged
When time Delay_time, and receive open enable signal after be delayed corresponding delay time Delay_time after control
Power switch tube is open-minded.
It should be noted that current power gear POWER and delay time Delay_ can be stored in advance in control unit 30
The relation table of time, and can be obtained and be corresponded to by lookup table mode after the current power gear POWER for obtaining electromagnetic heating apparatus
Delay time Delay_time, for example, the first power gear POWER1 corresponding first delay time Delay_time1, second
Power gear POWER2 corresponds to the second delay time Delay_time2, and so on；Current power gear POWER can also be passed through
Corresponding delay time Delay_time is calculated with the functional relation of delay time Delay_time.
That is, control unit 30 after the current power gear POWER for obtaining electromagnetic heating apparatus, obtains currently
The corresponding delay time Delay_time of power gear POWER, and receive open enable signal after start timing, counting
When to reach control power switch tube H1 after corresponding delay time Delay_time open-minded the time.
Specifically, according to one embodiment of present invention, as shown in figure 3, the first end 1b of resonance coil L2 adds with electromagnetism
The rectification filtering module 40 of hot equipment is connected, and the second end 2b of resonance coil L2 is connected with the collector of power switch tube H1, function
The emitter of rate switching tube H1 is grounded.Wherein, rectification filtering module 40 is used to AC rectification be direct current, specifically, hands over
Galvanic electricity can be 220V alternating current.Wherein, synchronized sampling circuit 20 the both ends resonance coil L2 voltage by first voltage Va less than
Two voltage Vb variation is to generate to open enable signal when first voltage Va is greater than second voltage Vb.
According to one embodiment of present invention, control unit 30 can pass through PWM (Pulse Width Modulation, arteries and veins
Rushing width modulated) signal control power switch tube H1 is switched on or off, so as to will rectification filter by power switch tube H1
DC inverter after wave module 40 rectifies is high-frequency alternating current, and is heated by resonance coil L2 to external cookware.
According to one embodiment of present invention, as shown in figure 3, arranging filter module 40 includes rectifier bridge 41, filter inductance
L1, the first filter capacitor C1 and the second filter capacitor C2.
Wherein, there is rectifier bridge 41 first DC terminal V+ and the second DC terminal V-, the second DC terminal V- of rectifier bridge 41 to connect
Ground；One end of first filter capacitor C1 is connected with the first DC terminal V+ of rectifier bridge 41, the other end of the first filter capacitor C1 with
Second DC terminal V- of rectifier bridge 41 is connected；One end of filter inductance L1 is connected with the first DC terminal V+ of rectifier bridge 41；Second
One end of filter capacitor C2 is connected with the other end of filter inductance L1, the other end ground connection of the second filter capacitor C2.
Thereby, it is possible to control power switch tube in different delayed time according to different capacity gear POWER by control unit
Between it is open-minded after Delay_time, to avoid different capacity to the influence of power switch tube working condition, power is effectively reduced and opens
Close the loss of pipe.
According to one embodiment of present invention, as shown in Fig. 2, synchronized sampling circuit 20 includes the first partial pressure unit 21, the
Two partial pressure units 22 and comparator 23.
Wherein, the first end 1b of the input terminal 1c and resonance coil L2 of the first partial pressure unit 21 are connected；Second partial pressure unit
The second end 2b of 22 input terminal 2c and resonance coil L2 are connected；The first end 23a of comparator 23 and the first partial pressure unit 21
Output end is connected, and the second end 23b of comparator 23 is connected with the output end of the second partial pressure unit 22, the output end of comparator 23
23c is connected with control unit 30.
That is, the first end 23a of comparator 23 obtains the first end of resonance coil L2 by the first partial pressure unit 21
The first voltage Va of 1b, the second end 23b of comparator 23 obtain the second end 2b of resonance coil L2 by the second partial pressure unit 22
Second voltage Vb, then, first voltage Va is compared by comparator 23 with second voltage Vb, and comparison result is sent to
Control unit 30, it is that voltage of the control unit 30 at the both ends resonance coil L2, which is less than second voltage Vb variation by first voltage Va,
It is generated when one voltage Va is greater than second voltage Vb and opens enable signal.
It should be noted that it is also inverting input terminal, comparator that the first end 23a of comparator 23, which can be normal phase input end,
23 second end 23b corresponds to inverting input terminal and normal phase input end.
According to one embodiment of present invention, when the first end 23a of comparator 23 is normal phase input end and comparator 23
Second end 23b opens enable signal when being inverting input terminal be rising edge, the rising that control unit 30 is exported according to comparator 23
Enable signal is opened along signal generation；As the second end 23b that the first end 23a of comparator 23 is inverting input terminal and comparator 23
It is failing edge to open enable signal when normal phase input end, control unit 30 is generated according to the failing edge signal that comparator 23 exports
Open enable signal.
In other words, if the second end 23b that the first end 23a of comparator 23 is normal phase input end and comparator 23 is that reverse phase is defeated
Enter end, at this point, comparator 23 is when it is that first voltage Va is greater than second voltage Vb that first voltage Va, which is less than second voltage Vb variation,
Rising edge signal is exported, control unit 30 opens enable signal according to rising edge signal generation；If the first end of comparator 23
23a is that the second end 23b of inverting input terminal and comparator 23 is normal phase input end at this point, comparator 23 is less than in first voltage Va
Second voltage Vb variation is that first voltage Va exports failing edge signal when being greater than second voltage Vb, and control unit 30 is according to failing edge
Enable signal is opened in signal generation.
According to one embodiment of present invention, comparator 23 can be integrally disposed with control unit 30, is independently of control
Unit 30 is arranged.
According to one embodiment of present invention, control unit 30 is also used to obtain that current power gear POWER is corresponding opens
The logical time, and after power switch tube H1 opens corresponding service time, control power switch tube H1 shutdown.
In conclusion the heating control apparatus of the electromagnetic heating apparatus proposed according to embodiments of the present invention, synchronized sampling electricity
Enable signal is opened according to the generation of the second voltage of the first voltage of the first end of resonance coil and the second end of resonance coil in road,
Control unit obtains the current power gear of electromagnetic heating apparatus, obtains the corresponding delay time of current power gear, and connecing
It is open-minded to receive control power switch tube after being delayed corresponding delay time after opening enable signal.The embodiment of the present invention as a result,
Heating control apparatus can adjust power switch tube according to power gear and open delay time, to solve different capacity shelves
The problem of position has an impact the working condition of power switch tube, is effectively reduced the loss of power switch tube.
The embodiment of the present invention also proposed a kind of electromagnetic heating apparatus.
Fig. 4 is the block diagram according to the electromagnetic heating apparatus of the embodiment of the present invention.As shown in figure 4, the present invention is implemented
The electromagnetic heating apparatus 200 of example includes the heating control apparatus 100 of above-mentioned electromagnetic heating apparatus.
According to one embodiment of present invention, electromagnetic heating apparatus 200 includes electromagnetic oven, prevention electromagnetic pressure cooker, electromagnetism electricity meal
Pot or electromagnetic stove.
The electromagnetic heating apparatus proposed according to embodiments of the present invention passes through the heating control apparatus of electromagnetic heating apparatus, energy
It is enough that delay time is opened according to power gear adjustment power switch tube, to solve different stalls power to power switch plumber
The loss of power switch tube is effectively reduced in the problem of having an impact as state.
Fig. 5 is the method for heating and controlling according to the electromagnetic heating apparatus of the embodiment of the present invention.Wherein, electromagnetic heating apparatus packet
Resonance modules and synchronized sampling circuit are included, resonance modules include resonance coil, resonant capacitance and power switch tube, synchronized sampling electricity
The first input end on road is connected with the first end of resonance coil, and the second of the second input terminal of synchronized sampling circuit and resonance coil
End is connected.
As shown in figure 5, the method for heating and controlling of the electromagnetic heating apparatus of the embodiment of the present invention, comprising the following steps:
S1: the current power gear POWER of electromagnetic heating apparatus is obtained.
S2: the corresponding delay time Delay_time of current power gear POWER is obtained.
S3: when synchronized sampling circuit is according to the of the first voltage of the first end of resonance coil and the second end of resonance coil
It is open-minded that power switch tube is controlled after enable signal is opened in the generation of two voltages, after the corresponding delay time Delay_time that is delayed.
It should be noted that the relation table of current power gear POWER Yu delay time Delay_time can be stored in advance,
And corresponding delay time can be obtained by lookup table mode after the current power gear POWER for obtaining electromagnetic heating apparatus
Delay_time can also be calculated by current power gear POWER with the functional relation of delay time Delay_time corresponding
Delay time Delay_time.
That is, obtaining current power gear after the current power gear POWER for obtaining electromagnetic heating apparatus
The corresponding delay time Delay_time of POWER, and receive open enable signal after start timing, reached in timing time
It is open-minded that power switch tube is controlled after to corresponding delay time Delay_time.
According to one embodiment of present invention, being switched on or off for power switch tube can be controlled by pwm signal, so as to
DC inverter after enough being rectified rectification filtering module by power switch tube is high-frequency alternating current, and passes through resonance coil pair
External cookware is heated.
According to one embodiment of present invention, the rectification filtering module phase of the first end of resonance coil and electromagnetic heating apparatus
Even, the second end of resonance coil is connected with the collector of power switch tube, the emitter ground connection of power switch tube, wherein synchronous
It is that first voltage is greater than second voltage that voltage of the sample circuit at resonance coil both ends, which is less than second voltage variation by first voltage,
Shi Shengcheng opens enable signal.
According to one embodiment of present invention, synchronized sampling circuit includes the first partial pressure unit, the second partial pressure unit and ratio
Compared with device, the input terminal of the first partial pressure unit is connected with the first end of resonance coil, the input terminal and resonance line of the second partial pressure unit
The second end of circle is connected, and the first end of comparator is connected with the output end of the first partial pressure unit, the second end of comparator and second
The output end of partial pressure unit is connected, wherein when the second end that the first end of comparator is normal phase input end and comparator is reverse phase
When input terminal, opening enable signal is rising edge, when the second end that the first end of comparator is inverting input terminal and comparator is
When normal phase input end, opening enable signal is failing edge.
It should be noted that it is also inverting input terminal that the first end of comparator, which can be normal phase input end, the of comparator
Two port should be inverting input terminal and normal phase input end.
That is, being opened when the second end that the first end of comparator is normal phase input end and comparator is inverting input terminal
Logical enable signal is rising edge, opens enable signal according to the rising edge signal generation of comparator output；When the first of comparator
End is the second end of inverting input terminal and comparator, and to open enable signal when being normal phase input end be failing edge, defeated according to comparator
Enable signal is opened in failing edge signal generation out.
In other words, if the second end that the first end of comparator is normal phase input end and comparator is inverting input terminal, at this point,
It is output rising edge letter when first voltage Va is greater than second voltage Vb that comparator, which is less than second voltage Vb variation in first voltage Va,
Number, then enable signal is opened according to rising edge signal generation；If the first end of comparator is inverting input terminal and comparator
Second end is normal phase input end at this point, it is that first voltage Va is greater than that comparator, which is less than second voltage Vb variation in first voltage Va,
Failing edge signal is exported when two voltage Vb, then enable signal is opened according to the generation of failing edge signal.
According to one embodiment of present invention, the method for heating and controlling of electromagnetic heating apparatus can further include: obtains current function
Rate gear POWER corresponding service time, after power switch tube opens corresponding service time, control power switch tube is closed
It is disconnected.
A specific embodiment according to the present invention, as shown in fig. 6, the acquisition delay time Delay_ of the embodiment of the present invention
The method of time the following steps are included:
S101: current power gear POWER is read.
S102: it is tabled look-up to obtain delay time Delay_time according to power unit POWER.
A specific embodiment according to the present invention, as shown in fig. 7, the power switch tube of the embodiment of the present invention opens control
Method processed the following steps are included:
S201: comparator exports high level rising edge.
S202: triggering external interrupt.
S203: it generates power switch tube and opens enable signal.
S204: delay delay time Delay_time.
S205: output pwm control signal control power switch tube is open-minded.
In conclusion the method for heating and controlling of the electromagnetic heating apparatus proposed according to embodiments of the present invention, by obtaining electricity
The current power gear of magnetic heating equipment obtains the corresponding delay time of current power gear, when synchronized sampling circuit is according to humorous
After enable signal is opened in the second voltage generation of the second end of the first voltage and resonance coil of the first end of vibration coil, delay
It is open-minded that power switch tube is controlled after corresponding delay time.The control method of the embodiment of the present invention as a result, can be according to power profile
Adjustment power switch tube in position opens delay time, generates shadow to power switch tube working condition to solve different stalls power
The loss of power switch tube is effectively reduced in loud problem.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (11)
1. a kind of heating control apparatus of electromagnetic heating apparatus characterized by comprising
Resonance modules, the resonance modules include resonance coil, resonant capacitance and power switch tube；
The first input end of synchronized sampling circuit, the synchronized sampling circuit is connected with the first end of the resonance coil, described
Second input terminal of synchronized sampling circuit is connected with the second end of the resonance coil, and the synchronized sampling circuit is used for according to institute
Enable signal is opened in the second voltage generation for stating the first voltage of the first end of resonance coil and the second end of the resonance coil；
Control unit, the described control unit control with the output end of the synchronized sampling circuit and the power switch tube respectively
Extremely it is connected, described control unit is used to obtain the current power gear of the electromagnetic heating apparatus, obtains the current power shelves
The corresponding delay time in position, and receive it is described open be delayed corresponding delay time after enable signal after control the function
Rate switching tube is open-minded.
2. the heating control apparatus of electromagnetic heating apparatus according to claim 1, which is characterized in that the resonance coil
First end is connected with the rectification filtering module of the electromagnetic heating apparatus, the second end of the resonance coil and the power switch
The collector of pipe is connected, the emitter ground connection of the power switch tube, wherein
It is first that voltage of the synchronized sampling circuit at the resonance coil both ends, which is less than second voltage variation by first voltage,
Voltage generates when being greater than second voltage and described opens enable signal.
3. the heating control apparatus of electromagnetic heating apparatus according to claim 1 or 2, which is characterized in that described synchronize is adopted
Sample circuit includes:
The input terminal of first partial pressure unit, first partial pressure unit is connected with the first end of the resonance coil；
The input terminal of second partial pressure unit, second partial pressure unit is connected with the second end of the resonance coil；
Comparator, the first end of the comparator are connected with the output end of first partial pressure unit, and the second of the comparator
End is connected with the output end of second partial pressure unit, and the output end of the comparator is connected with described control unit.
4. the heating control apparatus of electromagnetic heating apparatus according to claim 3, which is characterized in that wherein,
It is opened described in when the second end that the first end of the comparator is normal phase input end and the comparator is inverting input terminal
Logical enable signal is rising edge；
It is opened described in when the second end that the first end of the comparator is inverting input terminal and the comparator is normal phase input end
Logical enable signal is failing edge.
5. the heating control apparatus of electromagnetic heating apparatus according to claim 1, which is characterized in that described control unit is also
Corresponding service time is opened for obtaining the current power gear corresponding service time, and in the power switch tube
Afterwards, the power switch tube shutdown is controlled.
6. a kind of electromagnetic heating apparatus, which is characterized in that set including electromagnetic heating according to any one of claims 1-5
Standby heating control apparatus.
7. electromagnetic heating apparatus according to claim 6, which is characterized in that the electromagnetic heating apparatus include electromagnetic oven,
Prevention electromagnetic pressure cooker, electromagnetic rice cooker or electromagnetic stove.
8. a kind of method for heating and controlling of electromagnetic heating apparatus, which is characterized in that the electromagnetic heating apparatus includes resonance modules
With synchronized sampling circuit, the resonance modules include resonance coil, resonant capacitance and power switch tube, the synchronized sampling circuit
First input end be connected with the first end of the resonance coil, the second input terminal of the synchronized sampling circuit and the resonance
The second end of coil is connected, and the described method comprises the following steps:
Obtain the current power gear of the electromagnetic heating apparatus；
Obtain the corresponding delay time of the current power gear；
When the synchronized sampling circuit is according to the second of the first voltage of the first end of the resonance coil and the resonance coil
After enable signal is opened in the second voltage generation at end, it is open-minded that the power switch tube is controlled after the corresponding delay time that is delayed.
9. the method for heating and controlling of electromagnetic heating apparatus according to claim 8, which is characterized in that the resonance coil
First end is connected with the rectification filtering module of the electromagnetic heating apparatus, the second end of the resonance coil and the power switch
The collector of pipe is connected, the emitter ground connection of the power switch tube, wherein
It is first that voltage of the synchronized sampling circuit at the resonance coil both ends, which is less than second voltage variation by first voltage,
Voltage generates when being greater than second voltage and described opens enable signal.
10. the method for heating and controlling of electromagnetic heating apparatus according to claim 8 or claim 9, which is characterized in that described synchronize is adopted
Sample circuit include the first partial pressure unit, the second partial pressure unit and comparator, the input terminal of first partial pressure unit with it is described humorous
The first end of vibration coil is connected, and the input terminal of second partial pressure unit is connected with the second end of the resonance coil, the ratio
It is connected compared with the first end of device with the output end of first partial pressure unit, the second end of the comparator and second partial pressure are single
The output end of member is connected, wherein
It is described to open when the second end that the first end of the comparator is normal phase input end and the comparator is inverting input terminal
Logical enable signal is rising edge；
It is described to open when the second end that the first end of the comparator is inverting input terminal and the comparator is normal phase input end
Logical enable signal is failing edge.
11. the method for heating and controlling of electromagnetic heating apparatus according to claim 8, which is characterized in that further include:
Obtain the current power gear corresponding service time；
After the power switch tube opens corresponding service time, the power switch tube shutdown is controlled.
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| CN114390737A (en) * | 2021-12-17 | 2022-04-22 | 广东美的白色家电技术创新中心有限公司 | Power control circuit and power control method of electromagnetic heating device |
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