CN106211392A - Electromagnetic heating system and switching tube thereof open control apparatus and method - Google Patents
Electromagnetic heating system and switching tube thereof open control apparatus and method Download PDFInfo
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- CN106211392A CN106211392A CN201510217237.XA CN201510217237A CN106211392A CN 106211392 A CN106211392 A CN 106211392A CN 201510217237 A CN201510217237 A CN 201510217237A CN 106211392 A CN106211392 A CN 106211392A
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Abstract
The invention discloses a kind of electromagnetic heating system and switching tube thereof opens control apparatus and method, described electromagnetic heating system includes the resonance circuit being made up of heating coil, resonant capacitance and switching tube and the drive circuit driving described switching tube, described control device of opening includes: current detection circuit, described current detection circuit is connected with the emitter stage of described switching tube, and described current detection circuit flows through the immediate current of described switching tube for detection；Main control unit, described main control unit is respectively connected with described drive circuit and described current detection circuit, described main control unit for adjusting the heating power of described electromagnetic heating system according to the immediate current flowing through described switching tube, so that described switching tube meets and default opens requirement, thus, can by switching tube adjustment to preset open under requirement open-minded, better adapt to different pans, meet the demand of user, and it can be avoided that switching tube generates heat even damage because of advanced or delayed opening.
Description
Technical field
The present invention relates to living electric apparatus technical field, particularly to a kind of electromagnetic heating system breaker in middle pipe open control device,
A kind of electromagnetic heating system and a kind of electromagnetic heating system breaker in middle pipe open control method.
Background technology
IGBT pipe when opening optimal state be Uce ' (voltage between colelctor electrode and the emitter stage of IGBT pipe) be zero and
Reversely freewheel current is also zero, but due to the restriction of physical condition, Uce ' cannot oscillate to zero, adds
Thermal power is the least, and Uce ' is more difficult to oscillate to zero, now opens IGBT for the most open-minded；Reversely freewheel current is in a lot of situations
Under also be difficult to be zero, heating power is the biggest, and reverse freewheel current may be the biggest, now opens as delayed open-minded.
In the related, typically determined minima and the maximum of heating power by experiment, so that Uce ' is less than presetting
Voltage, reverse freewheel current are less than predetermined current.But, it has the drawback that Uce ' and reverse freewheel current only make
Just can be adjusted in preset range with during known pan, and for some unknown pans, it is impossible to ensure Uce ' and reverse afterflow
Electric current, all in preset range, so may cause IGBT pipe overheated, the problem being even damaged.Therefore, relevant skill
There are the needs improved in art.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the one of the present invention
What purpose was to propose a kind of electromagnetic heating system breaker in middle pipe opens control device, and this device can be by switching tube adjustment
To preset open under requirement open-minded.
Further object is that a kind of electromagnetic heating system of proposition.A further object of the present invention is to propose one
Electromagnetic heating system breaker in middle pipe open control method.
For reaching above-mentioned purpose, what one aspect of the present invention embodiment proposed a kind of electromagnetic heating system breaker in middle pipe opens control
Device, described electromagnetic heating system includes the resonance circuit being made up of heating coil, resonant capacitance and switching tube and drives institute
Stating the drive circuit of switching tube, described control device of opening includes: current detection circuit, described current detection circuit is with described
The emitter stage of switching tube is connected, and described current detection circuit flows through the immediate current of described switching tube for detection；Main control unit,
Described main control unit is respectively connected with described drive circuit and described current detection circuit, and described main control unit is for according to flowing through
The immediate current of described switching tube adjusts the heating power of described electromagnetic heating system, so that described switching tube meets default opening
Logical requirement.
The electromagnetic heating system breaker in middle pipe proposed according to embodiments of the present invention open control device, pass through current detection circuit
The immediate current of switching tube is flow through in detection, and main control unit adjusts adding of electromagnetic heating system according to the immediate current flowing through switching tube
Thermal power, so that switching tube meets and default opens requirement, thus, it is possible to switching tube adjustment is opened requirement to presetting
Under open-minded, better adapt to different pans, meet the demand of user, and it can be avoided that switching tube is opened because of advanced or delayed
Lead to and generate heat and even damage.
According to one embodiment of the invention, when the immediate current flowing through described switching tube is more than the first current threshold, described master
Switching tube described in control unit judges is the most open-minded, and increases the heating power of described electromagnetic heating system, wherein, described first
Current threshold is more than zero；When the immediate current flowing through described switching tube is less than the second current threshold, described main control unit judges
Described switching tube is delayed open-minded, and reduces the heating power of described electromagnetic heating system, and wherein, described second current threshold is little
In zero.
A specific embodiment according to the present invention, described switching tube is IGBT pipe, and the C pole of described IGBT pipe is with in parallel
Described heating coil harmony shake electric capacity be connected, the E pole of described IGBT pipe pass through described current detection circuit ground connection, described
The G pole of IGBT pipe is connected with described drive circuit.
For reaching above-mentioned purpose, another aspect of the present invention embodiment proposes a kind of electromagnetic heating system, including described switch
Pipe open control device.
The electromagnetic heating system proposed according to embodiments of the present invention, it is possible to switching tube adjustment is opened under requirement to default opening
Logical, better adapt to different pans, meet the demand of user.
A specific embodiment according to the present invention, described electromagnetic heating system includes electromagnetic oven, electromagnetic rice cooker, electromagnetism pressure
Power pot.
For reaching above-mentioned purpose, what another aspect of the invention embodiment proposed a kind of electromagnetic heating system breaker in middle pipe opens control
Method processed, described electromagnetic heating system includes resonance circuit and the driving being made up of heating coil, resonant capacitance and switching tube
The drive circuit of described switching tube, described control method of opening comprises the following steps: the moment electricity of described switching tube is flow through in detection
Stream；The heating power of described electromagnetic heating system is adjusted according to the immediate current flowing through described switching tube, so that described switching tube
Meet preset open requirement.
The electromagnetic heating system breaker in middle pipe proposed according to embodiments of the present invention open control method, flow through switching tube in detection
Immediate current after, adjust the heating power of electromagnetic heating system according to the immediate current flowing through switching tube, so that switching tube
Meet preset open requirement, thus, it is possible to switching tube adjustment is opened under requirement open-minded to default, better adapt to
Different pans, meets the demand of user, and it can be avoided that switching tube generates heat even damage because of advanced or delayed opening.
According to one embodiment of present invention, when the immediate current flowing through described switching tube is more than the first current threshold, it is judged that
Described switching tube is the most open-minded, and increases the heating power of described electromagnetic heating system, and wherein, described first current threshold is big
In zero；When the immediate current flowing through described switching tube is less than the second current threshold, it is judged that described switching tube is delayed open-minded, and
Reducing the heating power of described electromagnetic heating system, wherein, described second current threshold is less than zero.
Accompanying drawing explanation
Fig. 1 is the schematic diagram opening control device of electromagnetic heating system breaker in middle pipe according to embodiments of the present invention；
Fig. 2 is that switching tube occurs the waveform diagram of voltage and current when opening in advance；
Fig. 3 is that switching tube occurs the delayed waveform diagram of voltage and current when opening；
Fig. 4 is the schematic diagram opening control device of the electromagnetic heating system breaker in middle pipe according to one specific embodiment of the present invention；
And
Fig. 5 is the flow chart opening control method of electromagnetic heating system breaker in middle pipe according to embodiments of the present invention.
Reference:
Heat coil L2, resonant capacitance C2, switching tube Q1, resonance circuit 20, drive circuit 30, open control device
10, current detection circuit 101, main control unit 102, filter inductance L1, filter capacitor C1 and commutator 40.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical
Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings describe the embodiment of the present invention propose electromagnetic heating system breaker in middle pipe open control device,
Electromagnetic heating system and electromagnetic heating system breaker in middle pipe open control method, wherein, electromagnetic heating system is for pot
Tool heats.
Fig. 1 is the schematic diagram opening control device of electromagnetic heating system breaker in middle pipe according to embodiments of the present invention.Such as Fig. 1
Shown in, electromagnetic heating system include by heating coil L2, resonant capacitance C2 and the resonance circuit 20 that forms of switching tube Q1 with
And drive the drive circuit 30 of switching tube Q1.Wherein, resonance circuit 20 for carrying out resonance heating to pan, specifically,
When switching tube Q1 turns under the driving of drive circuit 30, heating coil L2 obtains charging, for maintaining heating coil L2
With the vibration between resonant capacitance C2 prepares, when switching tube Q1 turns off under the driving of drive circuit 30, heater wire
Circle L2 and resonant capacitance C2 vibrates.Thus produce alternating magnetic field, the magnetic line of force of alternating magnetic field around heating coil L2
Major part is by pan, and produces a large amount of eddy current in the bottom of a pan of pan, thus the heat needed for producing culinary art.
In embodiments of the present invention, as it is shown in figure 1, open control device 10 and include: current detection circuit 101 and master control list
Unit 102.Current detection circuit 101 is connected with the emitter stage of switching tube Q1, and current detection circuit 101 flows through out for detection
Close the immediate current of pipe Q1.It is to say, flow through the electric current of switching tube Q1 by current detection circuit 101 detecting, since
Judge whether to occur to open in advance or delayed open-minded.It should be noted that as it is shown in figure 1, be at switching tube Q1
During state, the immediate current flowing through switching tube Q1 can refer to flow to the electric current of emitter stage from colelctor electrode, and flows through switching tube Q1
The reverse freewheel current of body diode.
Main control unit 102 is respectively connected with drive circuit 30 and current detection circuit 101, and main control unit 102 is for according to stream
The immediate current crossing switching tube adjusts the heating power of electromagnetic heating system, so that switching tube Q1 meets and default opens requirement.
It is to say, main control unit 102 can export pwm control signal to drive circuit 30, open so that drive circuit 30 drives
Closing pipe Q1 on or off, main control unit 102 also can obtain the wink flowing through switching tube that current detection circuit 101 detects
Between electric current.
It should be noted that presets opens the voltage Uce requiring to specifically refer between colelctor electrode and the emitter stage of switching tube Q1
It is less than predetermined current less than predeterminated voltage and reverse freewheel current.
It should be noted that, the factor such as pan and heating power all can affect the open-minded of switching tube Q1.If heating power is relatively low,
Switching tube Q1 is it may happen that the most open-minded；If heating power is higher, switching tube Q1, can it may happen that delayed open-minded
By adjusting heating power so that switching tube Q1 meets default requirement of opening, and then it is different to make electromagnetic heating system adapt to
Pan.
During electromagnetic heating system heats, when can be opened, flow through the electricity of switching tube Q1 by detection switch pipe Q1
Stream, since judge whether switching tube Q1 occurs to open in advance or delayed open-minded.When switching tube Q1 opens, main control unit 102
The immediate current of switching tube can be obtained, and can determine whether whether switching tube Q1 meets default opening according to the immediate current of switching tube
Logical requirement.If it is satisfied, then maintain current heating power；If be unsatisfactory for, i.e. switching tube Q1 is advanced or delayed open-minded,
Then adjust heating power.
Thus, opening of the electromagnetic heating system breaker in middle pipe that the embodiment of the present invention proposes controls device 10, passes through current detecting
The immediate current of switching tube Q1 is flow through in circuit 101 detection, and main control unit 102 is adjusted according to the immediate current flowing through switching tube Q1
The heating power of whole electromagnetic heating system, so that switching tube Q1 meets and default opens requirement, thus, it is possible to by switching tube
Adjustment is opened under requirement open-minded to presetting, and better adapts to different pans, meets the demand of user, and can keep away
Exempt from switching tube to generate heat even damage because of advanced or delayed opening.
A concrete example according to the present invention, the duty of the pwm control signal that main control unit 102 can be exported by adjustment
Than reaching to adjust the purpose of heating power.
Further, according to one embodiment of present invention, when flowing through the immediate current of switching tube Q1 more than the first current threshold
Time, main control unit 102 judges that switching tube Q1 is the most open-minded, and increases the heating power of electromagnetic heating system, wherein, the
One current threshold is more than zero；When the immediate current flowing through switching tube Q1 is less than the second current threshold, main control unit 102 is sentenced
Disconnected switching tube Q1 is delayed open-minded, and reduces the heating power of electromagnetic heating system, and wherein, the second current threshold is less than zero.
It should be noted that when switching tube Q1 occurs to open in advance, the electricity between colelctor electrode and the emitter stage of switching tube Q1
The waveform of the electric current Ice pressing Uce and flow through switching tube Q1 is as in figure 2 it is shown, flow through the electric current Ice of switching tube Q1 open-minded
Can produce in a flash bigger short circuit current i1, so can detect this short circuit current i1, if short circuit current i1 is more than first
Current threshold, then judge that switching tube Q1 occurs the most open-minded；When there is delayed opening in switching tube Q1, switching tube Q1's
Voltage Uce between colelctor electrode and emitter stage and flow through the waveform of electric current Ice of switching tube Q1 as it is shown on figure 3, flow through switch
The electric current Ice of pipe Q1 can produce in a flash relatively big reversely freewheel current-i2 open, so can detect this reverse current-i2,
If reversely freewheel current-i2 is more than the second current threshold, then judge that switching tube Q1 occurs delayed open-minded.
As it has been described above, flow through the immediate current of switching tube Q1 by current detection circuit 101 detection.Open-minded at switching tube Q1
Time, when i.e. the pwm control signal in main control unit 102 output is become high level from low level, if flowing through switching tube Q1
Immediate current more than the first current threshold I1, then main control unit 102 increases the heating power of electromagnetic heating system, to reduce
Voltage Uce between colelctor electrode and emitter stage, makes voltage Uce deteriorate to less than predeterminated voltage, meets to preset and opens requirement,
Thus better conform to pan.If flowing through the immediate current of switching tube Q1 less than the second current threshold I2, then main control unit 102
Reduce the heating power of electromagnetic heating system, to reduce reverse freewheel current, make reverse freewheel current deteriorate to less than and preset electricity
Stream, meets to preset and opens requirement, thus better conform to pan.
Thus, the embodiment of the present invention open control device can by switching tube adjustment to default open under requirement open-minded,
Better adapt to different pans, meet the demand of user, and it can be avoided that switching tube generates heat because of advanced or delayed opening
Even damage.
A specific embodiment according to the present invention, as shown in Figure 4, heating coil L2 can be in parallel with resonant capacitance C2, opens
Closing pipe Q1 can be IGBT pipe, and the C pole of IGBT pipe is connected with heating coil L2 in parallel and resonant capacitance C2, IGBT
Current detection circuit 101 ground connection is passed through in the E pole of pipe, and the G pole of IGBT pipe is connected with drive circuit 30.
Further, such as the example of Fig. 4, electromagnetic heating system may also include filter inductance L1, filter capacitor C1 and rectification
Device 40.
Specifically, one end of filter inductance L1 is connected with one end of heating coil L2 and the resonant capacitance C2 after parallel connection, its
In, the heating other end of coil L2 and resonant capacitance C2 after parallel connection is extremely connected with the C of IGBT pipe；Filter capacitor C1
One end be connected with one end of filter inductance L1, the other end ground connection of filter capacitor C1；The first input end of commutator 40
Being connected with the live wire L of alternating current power supply AC, the second input of commutator 40 is connected with the zero line N of alternating current power supply AC, whole
First outfan of stream device 40 is connected with the other end of filter inductance L1, the second output head grounding of commutator 40.
It addition, the embodiment of the present invention also proposed a kind of electromagnetic heating system, including above-described embodiment switching tube open control
Device processed.
The electromagnetic heating system proposed according to embodiments of the present invention, it is possible to switching tube adjustment is opened under requirement to default opening
Logical, better adapt to different pans, meet the demand of user.
A specific embodiment according to the present invention, electromagnetic heating system can include electromagnetic oven, electromagnetic rice cooker, electromagnetic pressure
Pot etc..
Based on above-described embodiment, the invention allows for a kind of electromagnetic heating system breaker in middle pipe opens control method.
Fig. 5 is the flow chart opening control method of electromagnetic heating system breaker in middle pipe according to embodiments of the present invention.Electromagnetism adds
Hot systems includes the resonance circuit being made up of heating coil, resonant capacitance and switching tube and the drive circuit driving switching tube.
Comprise the following steps as it is shown in figure 5, open control method:
S1: the immediate current of switching tube is flow through in detection.
Wherein, the immediate current of switching tube can be flow through by the current detection circuit detection being connected with the emitter stage of switching tube.
It should be noted that the immediate current flowing through switching tube can refer to flow to the electric current of emitter stage from colelctor electrode, and flow through out
Close the reverse freewheel current of the body diode of pipe.
S2: adjust the heating power of electromagnetic heating system according to the immediate current flowing through switching tube, preset so that switching tube meets
Open requirement.
It should be noted that preset open require specifically refer between the colelctor electrode of switching tube and emitter stage voltage Uce little
It is less than predetermined current in predeterminated voltage and reverse freewheel current.
It should be noted that, the factor such as pan and heating power all can affect the open-minded of switching tube Q1.If heating power is relatively low,
Switching tube Q1 is it may happen that the most open-minded；If heating power is higher, switching tube Q1, can it may happen that delayed open-minded
By adjusting heating power so that switching tube Q1 meets default requirement of opening, and then it is different to make electromagnetic heating system adapt to
Pan.
During electromagnetic heating system heats, when switching tube Q1 opens, the immediate current of switching tube can be obtained,
And according to the immediate current of switching tube can determine whether switching tube whether meet preset open requirement.If it is satisfied, then remain current
Heating power；If be unsatisfactory for, i.e. switching tube is advanced or delayed open-minded, then adjust heating power.
Thus, the embodiment of the present invention propose electromagnetic heating system breaker in middle pipe open control method, flow through switch in detection
After the immediate current of pipe, adjust the heating power of electromagnetic heating system according to the immediate current flowing through switching tube, so that switch
Pipe meet preset open requirement, thus, it is possible to by switching tube adjustment to default open under requirement open-minded, the suitableeest
Answer different pans, meet the demand of user, and it can be avoided that switching tube generates heat even damage because of advanced or delayed opening.
According to one embodiment of present invention, when the immediate current flowing through switching tube is more than the first current threshold, it is judged that switch
Managing the most open-minded, and increase the heating power of electromagnetic heating system, wherein, the first current threshold is more than zero；When flowing through switch
When the immediate current of pipe is less than the second current threshold, it is judged that switching tube is delayed open-minded, and reduce electromagnetic heating system add hot merit
Rate, wherein, the second current threshold is less than zero.
It is to say, the immediate current of switching tube is flow through in detection.If flowing through the immediate current of switching tube more than the first current threshold
Value I1, then increase the heating power of electromagnetic heating system, to reduce the voltage Uce between colelctor electrode and emitter stage, make voltage
Uce deteriorates to less than predeterminated voltage, meets to preset and opens requirement, thus better conforms to pan.When switching tube Q1 opens,
If the immediate current flowing through switching tube is less than the second current threshold I2, then reduce the heating power of electromagnetic heating system, to subtract
Little reverse freewheel current, makes reverse freewheel current deteriorate to less than predetermined current, meets to preset and opens requirement, thus the suitableeest
Answer pan.
Thus, the embodiment of the present invention open control device can by switching tube adjustment to default open under requirement open-minded,
Better adapt to different pans, meet the demand of user, and it can be avoided that switching tube generates heat because of advanced or delayed opening
Even damage.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward ",
Orientation or the position relationship of the instruction such as " clockwise ", " counterclockwise ", " axially ", " radially ", " circumferential " are based on shown in the drawings
Orientation or position relationship, be for only for ease of describe the present invention and simplify describe rather than instruction or hint indication device or
Element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or
The implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or hidden
At least one this feature is included containing ground.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", the art such as " fixing "
Language should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be machinery
Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two units
Connection within part or the interaction relationship of two elements, unless otherwise clear and definite restriction.Ordinary skill for this area
For personnel, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be
First and second features directly contact, or the first and second features are by intermediary mediate contact.And, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below "
Can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second
Feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ",
Or specific features, structure, material or the feature bag that the description of " some examples " etc. means to combine this embodiment or example describes
It is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term necessarily
It is directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be arbitrary
Individual or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be combined by art personnel
And combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, revises, replaces and modification.
Claims (7)
1. an electromagnetic heating system breaker in middle pipe open control device, it is characterised in that described electromagnetic heating system includes
By heating coil, resonance circuit that resonant capacitance and switching tube form and the drive circuit driving described switching tube, described in open
The logical device that controls includes:
Current detection circuit, described current detection circuit is connected with the emitter stage of described switching tube, and described current detection circuit is used
The immediate current of described switching tube is flow through in detection；
Main control unit, described main control unit is respectively connected with described drive circuit and described current detection circuit, described master control list
Unit for adjusting the heating power of described electromagnetic heating system according to the immediate current flowing through described switching tube, so that described switch
Pipe meet preset open requirement.
2. electromagnetic heating system breaker in middle pipe as claimed in claim 1 open control device, it is characterised in that
When the immediate current flowing through described switching tube is more than the first current threshold, described main control unit judges that described switching tube surpasses
Before open-minded, and increase the heating power of described electromagnetic heating system, wherein, described first current threshold is more than zero；And
When the immediate current flowing through described switching tube is less than the second current threshold, described main control unit judges that described switching tube is stagnant
The most open-minded, and reduce the heating power of described electromagnetic heating system, wherein, described second current threshold is less than zero.
3. electromagnetic heating system breaker in middle pipe as claimed in claim 1 open control device, it is characterised in that described in open
Closing pipe to manage for IGBT, the C pole of described IGBT pipe is connected with the described heating coil harmony electric capacity that shakes of parallel connection, described IGBT
Described current detection circuit ground connection is passed through in the E pole of pipe, and the G pole of described IGBT pipe is connected with described drive circuit.
4. an electromagnetic heating system, it is characterised in that include opening of the switching tube as according to any one of claim 1-3
Logical control device.
5. electromagnetic heating system as claimed in claim 4, it is characterised in that described electromagnetic heating system include electromagnetic oven,
Electromagnetic rice cooker, prevention electromagnetic pressure cooker.
6. an electromagnetic heating system breaker in middle pipe open control method, it is characterised in that described electromagnetic heating system includes
By heating coil, resonance circuit that resonant capacitance and switching tube form and the drive circuit driving described switching tube, described in open
Logical control method comprises the following steps:
The immediate current of described switching tube is flow through in detection；
The heating power of described electromagnetic heating system is adjusted according to the immediate current flowing through described switching tube, so that described switching tube
Meet preset open requirement.
7. electromagnetic heating system breaker in middle pipe as claimed in claim 6 open control method, it is characterised in that
When the immediate current flowing through described switching tube is more than the first current threshold, it is judged that described switching tube is the most open-minded, and increases
Adding the heating power of described electromagnetic heating system, wherein, described first current threshold is more than zero；And
When the immediate current flowing through described switching tube is less than the second current threshold, it is judged that described switching tube is delayed open-minded, and subtracts
The heating power of little described electromagnetic heating system, wherein, described second current threshold is less than zero.
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| CN201510217237.XA CN106211392B (en) | 2015-04-30 | 2015-04-30 | Electromagnetic heating system and its switching tube open control device and method |
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| CN201510217237.XA CN106211392B (en) | 2015-04-30 | 2015-04-30 | Electromagnetic heating system and its switching tube open control device and method |
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| CN107592692A (en) * | 2016-07-08 | 2018-01-16 | 肇庆市天宇进出口贸易有限公司 | The electromagnetic heating control system and its control method of a kind of electromagnetic oven |
| CN108668393A (en) * | 2017-03-29 | 2018-10-16 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and its heating control apparatus and method |
| WO2019006753A1 (en) * | 2017-07-07 | 2019-01-10 | 肇庆市天宇进出口贸易有限公司 | Electromagnetic heating system of electromagnetic oven and control method therefor |
| CN110859014A (en) * | 2018-08-22 | 2020-03-03 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating equipment, electromagnetic heating device and control method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107592692A (en) * | 2016-07-08 | 2018-01-16 | 肇庆市天宇进出口贸易有限公司 | The electromagnetic heating control system and its control method of a kind of electromagnetic oven |
| CN107592692B (en) * | 2016-07-08 | 2020-12-25 | 肇庆市天宇进出口贸易有限公司 | Electromagnetic heating control system of electromagnetic oven and control method thereof |
| CN108668393A (en) * | 2017-03-29 | 2018-10-16 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and its heating control apparatus and method |
| WO2019006753A1 (en) * | 2017-07-07 | 2019-01-10 | 肇庆市天宇进出口贸易有限公司 | Electromagnetic heating system of electromagnetic oven and control method therefor |
| CN110859014A (en) * | 2018-08-22 | 2020-03-03 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating equipment, electromagnetic heating device and control method thereof |
| CN110859014B (en) * | 2018-08-22 | 2021-12-17 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating equipment, electromagnetic heating device and control method thereof |
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