CN106658795B - The control method and device of power switch tube in electromagnetic heating system - Google Patents
The control method and device of power switch tube in electromagnetic heating system Download PDFInfo
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- CN106658795B CN106658795B CN201510745051.1A CN201510745051A CN106658795B CN 106658795 B CN106658795 B CN 106658795B CN 201510745051 A CN201510745051 A CN 201510745051A CN 106658795 B CN106658795 B CN 106658795B
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- switch tube
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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
Abstract
The invention discloses the control method of power switch tube in electromagnetic heating system and devices, electromagnetic heating system include by power switch tube, resonant capacitance and resonance coil group at resonance circuit and the driving circuit that is switched on or off of driving power switching tube, for control method the following steps are included: when being turned off by driving circuit driving power switching tube, starting timer starts timing；Judge whether timing time is less than preset time；If it is determined that timing time is less than preset time, then continue to control driving circuit the first driving signal of output so that power switch tube is held off；If it is determined that timing time is greater than or equal to preset time, then the normal output drive signal of driving circuit is controlled with driving power switching tube.Problem logical, that turning-on voltage caused by avoiding the turn-off time too short is high, loss is big can be effectively prevent opening by mistake as a result, in the short time of power switch tube after shut-off, and prevent power switch tube work in excessively high working frequency, improve the reliability of power switch tube.
Description
Technical field
The present invention relates to living electric apparatus technical field, in particular to the control of power switch tube in a kind of electromagnetic heating system
The control device of power switch tube in method and a kind of electromagnetic heating system.
Background technique
Signal interference in the related electromagnetic heating system course of work is bigger, the short time after be easy to causeing switching tube to turn off
It inside opens again, however, the turning-on voltage of switching tube is high at this time, opens that peak point current is big, and oscillating voltage is high, turn-on consumption
Greatly, and switching tube twice in succession switch time it is too short be easy to cause working frequency excessively high, loss increase, it is reliable to influence IGBT
Property.
Therefore, the relevant technologies needs improve.
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 that a kind of control method of power switch tube in electromagnetic heating system, the control method can prevent from switching
Pipe opens by mistake logical in the short time after shut-off.
An object of the present invention is to provide a kind of control devices of power switch tube in electromagnetic heating system.
In order to achieve the above objectives, one aspect of the present invention embodiment proposes power switch tube in a kind of electromagnetic heating system
Control method, the electromagnetic heating system include by power switch tube, resonant capacitance and resonance coil group at resonance circuit with
And the driving circuit that the driving power switch tube is switched on or off, the control method is the following steps are included: pass through the drive
Described in dynamic circuit drives when power switch tube shutdown, starting timer starts timing；When judging whether timing time is less than default
Between；If it is determined that the timing time is less than the preset time, then continue to control the first driving of driving circuit output letter
Number so that the power switch tube is held off；If it is determined that the timing time is greater than or equal to the preset time,
Control the normal output drive signal of the driving circuit then to drive the power switch tube.
The control method proposed according to embodiments of the present invention, in power switch tube shutdown, starting timer starts timing,
If it is determined that timing time is less than preset time, then continue to control driving circuit the first driving signal of output so that power switch tube
It is held off, if it is determined that timing time is greater than or equal to preset time, then controls the normal output driving letter of driving circuit
Number with driving power switching tube.The control method can be effectively prevented in the short time of power switch tube after shut-off accidentally as a result,
Problem open-minded, that turning-on voltage caused by avoiding the turn-off time too short is high, crest voltage/peak point current is high, loss is big, and prevent
Only power switch tube work is in excessively high working frequency, the effective reliability for improving power switch tube.
According to some embodiments of the present invention, the normal output drive signal of the driving circuit is controlled to drive the power
Switching tube specifically includes: controlling the driving circuit and exports first driving signal normally to drive the power switch tube to close
It is disconnected, or control the driving circuit and export the second driving signal normally to drive the power switch tube open-minded.
According to some embodiments of the present invention, first driving signal is low level signal, second driving signal
For high level signal.
According to some embodiments of the present invention, the control method further include: detect the work shape of the resonance circuit
State is to generate detection signal；Shutdown control signal is generated according to the detection signal, by described in driving circuit driving
Power switch tube shutdown.
According to some embodiments of the present invention, the power switch tube is IGBT.
In order to achieve the above objectives, another aspect of the present invention embodiment proposes power switch tube in a kind of electromagnetic heating system
Control device, the electromagnetic heating system include by power switch tube, resonant capacitance and resonance coil group at resonance circuit
And the driving circuit that the driving power switch tube is switched on or off, the control device includes: timer；Control module,
Start based on the timer starts when the control module is by driving power switch tube shutdown by the driving circuit
When, and judge whether timing time is less than preset time, wherein if it is determined that the timing time is less than the preset time,
The control module then continues to control the first driving signal of the driving circuit output so that the power switch tube is held off
State；If it is determined that the timing time is greater than or equal to the preset time, the control module then controls the driving electricity
The normal output drive signal in road is to drive the power switch tube.
The control device proposed according to embodiments of the present invention, in power switch tube shutdown, starting timer starts timing,
If it is determined that timing time is less than preset time, then controller continues to control driving circuit the first driving signal of output so that power
Switching tube is held off, if it is determined that timing time is greater than or equal to preset time, then controller is controlling driving circuit just
Normal output drive signal is with driving power switching tube.Power switch tube can be effectively prevented after shut-off in the control device as a result,
Short time in open by mistake logical, turning-on voltage caused by avoiding the turn-off time too short is high, crest voltage/peak point current is high, loss is big
The problem of, and prevent power switch tube work in excessively high working frequency, the effective reliability for improving power switch tube.
According to some embodiments of the present invention, when the control module controls the normal output drive signal of driving circuit
When driving the power switch tube, wherein the control module controls the driving circuit and normally exports first driving
To drive, the power switch tube turns off signal or the control module controls the driving circuit and normally exports the second driving
Signal is open-minded to drive the power switch tube.
According to some embodiments of the present invention, first driving signal is low level signal, second driving signal
For high level signal.
According to some embodiments of the present invention, the control device further include: signal detection module, the signal detection
Module is connected with the control module, and the signal detection module is used to detect the working condition of the resonance circuit to generate inspection
Survey signal, wherein the control module is used to generate shutdown control signal according to the detection signal by the driving electricity
Road drives the power switch tube shutdown.
According to some embodiments of the present invention, the power switch tube is IGBT, and the control module is MCU or signal is sent out
Raw circuit.
Detailed description of the invention
Fig. 1 is the flow chart of the control method of power switch tube in electromagnetic heating system according to an embodiment of the present invention；
Fig. 2 is the process of the control method of power switch tube in electromagnetic heating system according to an embodiment of the invention
Figure；
Fig. 3 is the box signal of the control device of power switch tube in electromagnetic heating system according to an embodiment of the present invention
Figure；And
Fig. 4 is that the box of the control device of power switch tube in electromagnetic heating system according to an embodiment of the invention shows
It is intended to.
Appended drawing reference:
Timer 10, control module 20, power switch tube 30,40 driving circuit 50 of resonance circuit and signal detection module 60.
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.
With reference to the accompanying drawing come describe the embodiment of the present invention proposition electromagnetic heating system in power switch tube controlling party
Method and device.
Electromagnetic heating system include by power switch tube, resonant capacitance and resonance coil group at resonance circuit and driving
The driving circuit that power switch tube is switched on or off, the power supply circuit that electromagnetic heating system may also include for resonance circuit power supply.
Wherein, resonant capacitance mode can connect in parallel or series with resonance coil, when resonant capacitance and resonance coil are with parallel way
When connection, one end of resonant capacitance is connected with the collector of power switch tube, and the other end of resonant capacitance is connected with power supply circuit,
The emitter of power switch tube is grounded, and the grid of power switch tube is connected with driving circuit.In the electromagnetic heating system course of work
In, when power switch tube is opened, resonance coil is charged, and does standard with the oscillation between resonant capacitance and resonance coil
Standby, when power switch tube shutdown, resonant capacitance and resonance coil start to be vibrated, and resonance coil generates alternating magnetic field, hand over
The magnetic line of force of varying magnetic field largely passes through cookware, and a large amount of vortex are generated in the bottom of a pan of cookware, thus needed for generating culinary art
Heat realizes resonance heating.
Fig. 1 is the flow chart of the control method of power switch tube in electromagnetic heating system according to an embodiment of the present invention.Root
According to a specific example of the invention, power switch tube can for IGBT (Insulated Gate Bipolar Transistor,
Insulated gate bipolar transistor).As shown in Figure 1, control method the following steps are included:
S1: when being turned off by driving circuit driving power switching tube, starting timer starts timing.
That is, the exportable shutdown of the control module of electromagnetic heating system controls signal to driving circuit, to drive function
The shutdown of rate switching tube.And in power switch tube shutdown, control module control timer starts timing.
S2: judge whether timing time is less than preset time.
S3: if it is determined that timing time be less than preset time, then continue control driving circuit export the first driving signal with
It is held off power switch tube.
S4: if it is determined that timing time is greater than or equal to preset time, then the normal output drive signal of driving circuit is controlled
With driving power switching tube.
That is, the timing time T of timer is obtained in real time, when timing time T is small during power switch tube shutdown
When preset time T min, control module does not allow power switch tube open-minded, and the first driving signal of driving circuit output is locked
Extremely, so that the influence of the interference-free signal of the first driving signal, in this way control driving circuit continue to output the first driving signal with
Control power switch tube shutdown；When timing time T is greater than or equal to preset time T min, control module allows power switch tube
Open-minded, the locking state of the first driving signal is released from, such control module can to the normal output drive signal of driving circuit, with
Driving power switching tube is switched on or off, logical so as to effectively prevent opening by mistake in the short time of power switch tube after shut-off,
The problem that turning-on voltage caused by avoiding the turn-off time too short is high, crest voltage/peak point current is high, loss is big, and prevent function
The work of rate switching tube is in excessively high working frequency, the effective reliability for improving power switch tube.
Further it will be understood that the timing time of timer can be reset when power switch tube is opened every time.
According to one embodiment of present invention, the control normal output drive signal of driving circuit is with driving power switching tube tool
Body includes: that control driving circuit exports the first driving signal normally with the shutdown of driving power switching tube, or control driving circuit
The second driving signal of normal output is open-minded with driving power switching tube.Wherein, the first driving signal can be low level signal, second
Driving signal can be high level signal.
That is, when T is greater than or equal to Tmin, if control module still exports shutdown control signal and gives driving electricity
Road, then driving circuit exports the first driving signal normally with the shutdown of driving power switching tube；If control is opened in control module output
Signal processed is to driving circuit, then it is open-minded with driving power switching tube normally to export the second driving signal for driving circuit.
Further, the control method of the embodiment of the present invention may also include that the working condition of detection resonance circuit to generate
Detect signal；Shutdown control signal is generated according to detection signal, to turn off by driving circuit driving power switching tube.
That is, the work shape of resonance circuit can be detected by synchronous comparison circuit during power switch tube is opened
State, control module can control power switch tube shutdown according to the detection signal that synchronous comparison circuit exports, in other words in synchronous ratio
Compared with circuit output signal change high level signal is for example become from low level signal when, control module produce shutdown control
Signal processed, to be turned off by driving circuit driving power switching tube.
As shown in Fig. 2, the control method of power switch tube according to an embodiment of the present invention specifically can comprise the following steps that
S101: output shutdown control signal is with switch-off power switching tube.
S102: starting timer starts timing, to record timing time T.
S103: setting preset time T min.
S104: judge whether timing time T is less than preset time T min.
If so, thening follow the steps S105；If not, thening follow the steps S106.
S105: forbid power switch tube open-minded.
S106: allow power switch tube open-minded.
In conclusion the control method proposed according to embodiments of the present invention starts timer in power switch tube shutdown
Start timing, if it is determined that timing time be less than preset time, then continue control driving circuit export the first driving signal so that
Power switch tube is held off, if it is determined that timing time is greater than or equal to preset time, then it is normal to control driving circuit
Output drive signal is with driving power switching tube.Power switch tube can be effectively prevented after shut-off in the control method as a result,
Open by mistake logical in short time, turning-on voltage caused by avoiding the turn-off time too short is high, crest voltage/peak point current is high, loss is big
Problem, and prevent power switch tube work in excessively high working frequency, the effective reliability for improving power switch tube.
Based on the above embodiment, the embodiment of the present invention also proposed a kind of control of power switch tube in electromagnetic heating system
Device.Wherein, electromagnetic heating system include by power switch tube, resonant capacitance and resonance coil group at resonance circuit 40 and
The driving circuit 50 that driving power switching tube 30 is switched on or off.The confession that electromagnetic heating system may also include for resonance circuit power supply
Circuit.Wherein, resonant capacitance mode can connect in parallel or series with resonance coil, when resonant capacitance and resonance coil are with simultaneously
When connection mode connects, one end of resonant capacitance is connected with the collector of power switch tube 30, the other end of resonant capacitance and power supply
Circuit is connected, and the emitter ground connection of power switch tube 30, the grid of power switch tube 30 is connected with driving circuit 50.
Fig. 3 is the block diagram according to the control device of power switch tube in electromagnetic heating system.It is according to the present invention
One specific example, power switch tube 30 can be IGBT.As shown in figure 3, the control device includes: timer 10 and control module
20。
Wherein, starting timer 10 is opened when control module 10 is used to turn off by 50 driving power switching tube 30 of driving circuit
Beginning timing, and judge whether timing time is less than preset time, wherein if it is determined that timing time is less than preset time, control
Module 20 then continues to control the first driving signal of output of driving circuit 50 so that power switch tube 30 is held off；If sentenced
Disconnected timing time is greater than or equal to preset time, and control module 20 controls the normal output drive signal of driving circuit 50 then to drive
Power switch tube 30.
That is, the exportable shutdown of control module 20 controls signal to driving circuit 50, with driving power switching tube 30
Shutdown.And when power switch tube 30 turns off, 50 control timer 10 of control module starts timing.
During power switch tube 30 turns off, control module 20 obtains the timing time T of timer 10 in real time, when timing
Between T be less than preset time T min when, control module 20 does not allow power switch tube 30 open-minded, first that driving circuit 50 is exported
Driving signal is locked, so that the influence of the interference-free signal of the first driving signal, controls driving circuit 50 in this way and continues to output the
One driving signal is to control the shutdown of power switch tube 30；When timing time T is greater than or equal to preset time T min, control module
20 allow power switch tube open-minded, and the locking state of the first driving signal is released from, and such control module 20 can be to driving circuit
50 normal output drive signals, are switched on or off with driving power switching tube 30, so as to effectively prevent power switch tube to exist
Open by mistake logical in short time after shutdown, turning-on voltage caused by avoiding the turn-off time too short is high, crest voltage/peak point current is high,
Big problem is lost, and prevents power switch tube work in excessively high working frequency, it is effective improve power switch tube can
By property.
Further it will be understood that when power switch tube 20 is opened, equal control module 20 can be by timer 10 every time
Timing time is reset.
A specific example according to the present invention, control module 20 can be MCU or signal generating circuit.
According to one embodiment of present invention, when control module 20 controls the normal output drive signal of driving circuit 50 to drive
When dynamic power switch tube 30, wherein control module 20 controls driving circuit 50 and exports the first driving signal normally with driving power
The shutdown of switching tube 30 or control module 20 control driving circuit 50 and export the second driving signal normally with driving power switching tube
30 is open-minded.Wherein, the first driving signal is low level signal, and the second driving signal is high level signal.
That is, when T is greater than or equal to Tmin, if control module 20 still exports shutdown control signal to driving
Circuit 50, then normally the first driving signal of output is turned off driving circuit 50 with driving power switching tube 30；If control module 20
It exports and opens control signal to driving circuit 50, then driving circuit 50 exports the second driving signal normally with driving power switching tube
30 is open-minded.
Further, as shown in figure 4, the control device of the embodiment of the present invention, further includes: signal detection module 60.Wherein,
Signal detection module 60 is connected with control module 20, and signal detection module 60 is used to detect the working condition of resonance circuit 40 with life
At detection signal, wherein control module 20 is used to generate shutdown control signal according to detection signal to drive by driving circuit 50
Dynamic power switch tube 30 turns off.
A specific example according to the present invention, signal detection module 60 can be synchronous comparison circuit.
That is, during power switch tube 30 is opened, control module 20 can detect resonance by synchronous comparison circuit
The working condition of circuit, and can be turned off according to the detection signal that synchronous comparison circuit exports to control power switch tube 30, in other words
When the output signal of synchronous comparison circuit, which changes, for example becomes high level signal from low level signal, control module 20 can
Shutdown control signal is generated, to turn off by 50 driving power switching tube 30 of driving circuit.
In conclusion the control device proposed according to embodiments of the present invention starts timer in power switch tube shutdown
Start timing, if it is determined that timing time is less than preset time, then controller continues to control driving circuit output the first driving letter
Number so that power switch tube is held off, if it is determined that timing time is greater than or equal to preset time, then controller is controlled
The normal output drive signal of driving circuit is with driving power switching tube.Power switch can be effectively prevented in the control device as a result,
Pipe opens by mistake logical, the height of turning-on voltage caused by avoiding the turn-off time too short, crest voltage/peak point current in the short time after shut-off
Problem high, loss is big, and prevent power switch tube work in excessively high working frequency, effectively improve power switch tube
Reliability.
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 (10)
1. the control method of power switch tube in a kind of electromagnetic heating system, which is characterized in that the electromagnetic heating system includes
By power switch tube, resonant capacitance and resonance coil group at resonance circuit and the driving power switch tube be switched on or off
Driving circuit, the control method the following steps are included:
When driving power switch tube shutdown by the driving circuit, starting timer starts timing；
Judge whether timing time is less than preset time；
If it is determined that the timing time is less than the preset time, then continue to control the first driving of driving circuit output letter
Number so that the power switch tube is held off；
If it is determined that the timing time is greater than or equal to the preset time, then the normal output driving of the driving circuit is controlled
Signal is to drive the power switch tube.
2. control method as described in claim 1, which is characterized in that control the normal output drive signal of the driving circuit with
Drive the power switch tube to specifically include: controlling the driving circuit, normally to export first driving signal described to drive
Power switch tube shutdown, or the control driving circuit export the second driving signal normally to drive the power switch tube to open
It is logical.
3. control method as claimed in claim 2, which is characterized in that first driving signal is low level signal, described
Second driving signal is high level signal.
4. control method as described in claim 1, which is characterized in that further include:
During the power switch tube is opened, the working condition of the resonance circuit is detected to generate by synchronous comparison circuit
Detect signal；
If the level state of the detection signal of the synchronous comparison circuit output changes, shutdown control signal is generated,
To drive the power switch tube to turn off by the driving circuit.
5. control method as described in claim 1, which is characterized in that the power switch tube is IGBT.
6. the control device of power switch tube in a kind of electromagnetic heating system, which is characterized in that the electromagnetic heating system includes
By power switch tube, resonant capacitance and resonance coil group at resonance circuit and the driving power switch tube be switched on or off
Driving circuit, the control device includes:
Timer；
Control module, when the control module is used to drive power switch tube shutdown by the driving circuit described in starting
Timer starts timing, and judges whether timing time is less than preset time, wherein
If it is determined that the timing time is less than the preset time, the control module then continues to control the driving circuit defeated
The first driving signal is so that the power switch tube is held off out；
If it is determined that the timing time is greater than or equal to the preset time, the control module then controls the driving circuit
Normal output drive signal is to drive the power switch tube.
7. control device as claimed in claim 6, which is characterized in that when the control module control driving circuit is normal
When output drive signal is to drive the power switch tube, wherein
The control module controls the driving circuit and exports first driving signal normally to drive the power switch tube
Shutdown or the control module control the driving circuit and export the second driving signal normally to drive the power switch tube
It is open-minded.
8. control device as claimed in claim 7, which is characterized in that first driving signal is low level signal, described
Second driving signal is high level signal.
9. control device as claimed in claim 6, which is characterized in that further include:
Signal detection module, the signal detection module are connected with the control module, and the signal detection module is for detecting
The working condition of the resonance circuit is to generate detection signal, wherein the signal detection module is synchronous comparison circuit, described
Control module is used to detect the work shape of the resonance circuit by synchronous comparison circuit during the power switch tube is opened
State is generated when the level state for the detection signal that the synchronous comparison circuit exports changes and is closed to generate detection signal
Disconnected control signal, to drive the power switch tube to turn off by the driving circuit.
10. control device as claimed in claim 6, which is characterized in that the power switch tube is IGBT, the control module
For MCU or signal generating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510745051.1A CN106658795B (en) | 2015-11-03 | 2015-11-03 | The control method and device of power switch tube in electromagnetic heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510745051.1A CN106658795B (en) | 2015-11-03 | 2015-11-03 | The control method and device of power switch tube in electromagnetic heating system |
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| CN106658795B true CN106658795B (en) | 2019-11-05 |
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| CN110958728B (en) * | 2019-11-14 | 2022-02-01 | 九阳股份有限公司 | Method for controlling power of electromagnetic heating equipment and electromagnetic heating equipment |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1005812B (en) * | 1985-06-13 | 1989-11-15 | 三洋电机株式会社 | Induction heating apparatus |
| JP2003332039A (en) * | 2002-03-04 | 2003-11-21 | Sharp Corp | High frequency heating device |
| JP4444076B2 (en) * | 2004-11-15 | 2010-03-31 | 株式会社東芝 | Induction heating cooker |
| DE102005050036A1 (en) * | 2005-10-14 | 2007-05-31 | E.G.O. Elektro-Gerätebau GmbH | Induction heater and associated operation and pan detection method |
| CA2911570C (en) * | 2010-03-31 | 2017-04-11 | Panasonic Intellectual Property Management Co., Ltd. | Induction heating cookware |
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