CN108811214A - Power supply anomaly protection method, device and electromagnetic heating system - Google Patents
Power supply anomaly protection method, device and electromagnetic heating system Download PDFInfo
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- CN108811214A CN108811214A CN201710307531.9A CN201710307531A CN108811214A CN 108811214 A CN108811214 A CN 108811214A CN 201710307531 A CN201710307531 A CN 201710307531A CN 108811214 A CN108811214 A CN 108811214A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims abstract description 12
- 230000006837 decompression Effects 0.000 claims description 22
- 230000005669 field effect Effects 0.000 claims description 22
- 230000005611 electricity Effects 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 235000013399 edible fruits Nutrition 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract 1
- 230000002159 abnormal effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 5
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Classifications
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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
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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
- H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
- H05B2206/02—Induction heating
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- Control Of Resistance Heating (AREA)
Abstract
The present invention relates to field of circuit technology, a kind of power supply anomaly protection method, device and electromagnetic heating system are disclosed, solving the problems, such as system power supply extremely causes IGBT uncontrolled.Abnormity of power supply protective device includes sequentially connected system power supply, comparator and execution unit, system power supply includes the first output end of system power supply and system power supply second output terminal, the first output end of system power supply and system power supply second output terminal are respectively connected to the input terminal of comparator, the output end of comparator is connect with execution unit, the poles G of execution unit and insulated gate bipolar transistor IGBT connect, the poles G of IGBT connect with driving unit and power to driving unit, execution unit is configured as the voltage change according to the output end of comparator when system power supply exception, the G pole tensions of IGBT are dragged down, so that driving unit is stopped.During abnormity of power supply detection process of the embodiment of the present invention suitable for electromagnetic heating system.
Description
Technical field
The present invention relates to field of circuit technology, and in particular, to a kind of power supply anomaly protection method, device and electromagnetic heating
System.
Background technology
In electromagnetic heating system, in order to ensure the drive signal stability of resonance circuit, the IGBT in resonance circuit
(Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) driving voltage and main control chip power supply
Voltage is needed while being powered on, power down, but since actual application environment is there are interference such as power network fluctuation, abnormal signals, is caused
IGBT driving voltages and main control chip supply voltage cannot be guaranteed to power on simultaneously and power down, to solve the above-mentioned problems, existing
Increase storage capacitor in technology in power module, to improve power supply stability, but still can not thoroughly solve abnormity of power supply
Caused main control chip supply voltage shifts to an earlier date power down or power-on delay, so as to cause other function modules in electromagnetic heating system
It is uncontrolled, for example, can not stop immediately when main control chip supply voltage exception IGBT driving, cause IGBT driving voltages not by
Control, the serious consequences such as electromagnetic heating system may be caused on fire.
Invention content
The object of the present invention is to provide a kind of power supply anomaly protection method, device and electromagnetic heating systems, solve system
The problem that abnormity of power supply causes IGBT uncontrolled ensure that and forbid IGBT open-minded when system power supply exception, improves electromagnetism and add
The stability of hot systems.
To achieve the goals above, the present invention provides a kind of abnormity of power supply protective device, including sequentially connected system electricity
Source, comparator and execution unit, the system power supply include the first output end of system power supply and system power supply second output terminal, institute
It states the first output end of system power supply and system power supply second output terminal is respectively connected to the input terminal of the comparator, the comparator
Output end connect with the execution unit, the connection of the poles G of the execution unit and insulated gate bipolar transistor IGBT is described
The poles G of IGBT connect with driving unit and power to the driving unit；
Wherein, the electricity of the output end of the comparator when execution unit is configured as according to the system power supply exception
Buckling drags down the G pole tensions of the IGBT, so that the driving unit is stopped.
Optionally, it is high level that the voltage change of the output end of the comparator, which is voltage by low level overturning,.
Optionally, the execution unit be triode, field-effect tube, optocoupler or it is silicon-controlled in any one, wherein
The triode is managed for NPN, and the base stage of the NPN pipes connects the output end of the comparator, and collector connects the G of the IGBT
Pole, emitter ground connection；The field-effect tube be N-channel type field-effect tube, the N-channel type field-effect tube grid connection described in
The output end of comparator, drain electrode connect the poles G of the IGBT, source electrode ground connection；The anode of the optocoupler connects the comparator
Output end.
Optionally, it is low level that the voltage change of the output end of the comparator, which is voltage by high level overturning,.
Optionally, the execution unit is any one in triode, field-effect tube or optocoupler, wherein described three
Pole pipe is PNP pipe, and the base stage of the PNP pipe connects the output end of the comparator, and emitter connects the poles G of the IGBT, collection
Electrode is grounded；The field-effect tube is P-channel type field-effect tube, and the grid of the P-channel type field-effect tube connects the comparison
The output end of device, source electrode connect the poles G of the IGBT, grounded drain；The cathode of the optocoupler connects the output of the comparator
End.
The embodiment of the present invention also provides a kind of power supply anomaly protection method, and the method is applied to be protected in the abnormity of power supply
On device, the method includes：
The output voltage of detecting system power supply the first output end and system power supply second output terminal；
Compare the output voltage of the first output end of the system power supply and the output electricity of the system power supply second output terminal
Pressure；
According to the variation of the comparison result of output voltage, control IGBT cut-offs, so that the driving unit is stopped.
Optionally, the variation of the comparison result according to output voltage, control IGBT cut-offs, so that the driving is single
Member be stopped including：
When the comparator output be by high level overturning be low level, or by low level overturning be high level when,
The G pole tensions that the execution unit drags down the IGBT are triggered, the IGBT is forbidden to be connected, so that driving unit stops work
Make.
The embodiment of the present invention also provides a kind of electromagnetic heating system, and the electromagnetic heating system includes that the abnormity of power supply is protected
Protection unit further includes the main control chip being connect with the first output end of system power supply, it is whole to be connect with system power supply second output terminal
Flow filter unit and with the sequentially connected resonant element of the rectification filtering unit and driving unit, wherein the resonance list
Member includes IGBT, and the poles G of the IGBT are connect with the driving unit,
The rectification filtering unit is configured for carrying out rectification to the voltage that the system power supply second output terminal exports
Filtering；
The resonant element is configured for generating the drive signal for controlling the driving unit；
The driving unit is configured for control electromagnetic heating.
Optionally, the electromagnetic heating system further includes main control chip supply voltage processing circuit and non-master control chip power
One end of voltage processing circuitry, the main control chip supply voltage processing circuit connects first output end of system power supply, institute
The one end for stating non-master control chip power voltage processing circuit connects the system power supply second output terminal, the main control chip power supply
The other end of voltage processing circuitry and the other end of the non-master control chip power voltage processing circuit are respectively connected to the comparison
The input terminal of device；
Wherein, the main control chip supply voltage processing circuit is configured for the first output end of the system power supply
Voltage is handled, so that treated voltage is within the scope of the assigned voltage of the input terminal of the comparator；
The non-master control chip power voltage processing circuit is configured for the electricity to the system power supply second output terminal
Pressure is handled, so that treated voltage is within the scope of the assigned voltage of the input terminal of the comparator.
Optionally, the main control chip supply voltage processing circuit includes being depressured processing circuit or boosting processing circuit,
The decompression processing circuit is configured for carrying out the voltage of the first output end of the system power supply decompression processing, the boosting
Processing circuit is configured for carrying out boosting processing to the voltage of the first output end of the system power supply.
Optionally, the main control chip supply voltage processing circuit further includes and decompression processing circuit or boosting processing electricity
Road connection is filtered circuit, and the circuit that is filtered is configured for voltage to the first output end of the system power supply
It is filtered.
Optionally, the non-master control chip power voltage processing circuit includes decompression processing circuit or boosting processing electricity
Road, the decompression processing circuit is configured for carrying out the voltage of the system power supply second output terminal decompression processing, described
Boosting processing circuit is configured for carrying out boosting processing to the voltage of the second outlet of the system power supply.
Optionally, the non-master control chip power voltage processing circuit further includes being handled with decompression processing circuit or boosting
Circuit connection is filtered circuit, and the circuit that is filtered is configured for electricity to the system power supply second output terminal
Pressure is filtered.
Through the above technical solutions, by the way that the first output end of system power supply and system power supply second output terminal are respectively connected to
The input terminal of the comparator by comparing the voltage change of the output end of device, controls IGBT when system power supply is deposited when abnormal
Cut-off, so that the driving unit is stopped.The embodiment of the present invention, which solves system power supply extremely, causes IGBT uncontrolled
The problem of, it ensure that and forbid IGBT open-minded when system power supply exception, improve the stability of electromagnetic heating system.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is to be used to provide further understanding of the present invention, an and part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is a kind of schematic diagram of abnormity of power supply protective device provided in an embodiment of the present invention；
Fig. 2 is a kind of flow chart of power supply anomaly protection method provided in an embodiment of the present invention；
Fig. 3 is a kind of schematic diagram of electromagnetic heating system provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of another electromagnetic heating system provided in an embodiment of the present invention；
Fig. 5 is the circuit diagram of another electromagnetic heating system provided in an embodiment of the present invention.
Specific implementation mode
The specific implementation mode of the present invention is described in detail below in conjunction with attached drawing.It should be understood that this place is retouched
The specific implementation mode stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The embodiment of the present invention provides a kind of abnormity of power supply protective device, as shown in Figure 1, including sequentially connected system power supply
11, comparator 12 and execution unit 13, the system power supply 11 include the first output end of system power supply 111 and system power supply second
Output end 112, the first output end of the system power supply 111 and system power supply second output terminal 112 are respectively connected to the comparator
12 input terminal, the output end of the comparator 12 are connect with the execution unit 13, and the execution unit 13 is double with insulated gate
The poles G of bipolar transistor IGBT (not shown) connect, and the poles G of the IGBT connect with driving unit (not shown) and to institute
State driving unit power supply；
Wherein, the output end of the comparator 12 when the execution unit 13 is configured as according to the system power supply exception
Voltage change, the G pole tensions of the IGBT are dragged down, so that the driving unit is stopped.
The embodiment of the present invention is by the way that the first output end of system power supply and system power supply second output terminal to be respectively connected to compare
The input terminal of device, when system power supply is deposited when abnormal, by comparing the voltage change of the output end of device, by the poles G of the IGBT
Voltage pull-down is to so that the driving unit is stopped.The embodiment of the present invention solves system power supply leads to IGBT extremely
Uncontrolled problem ensure that and forbid IGBT open-minded when system power supply exception, improves the stability of electromagnetic heating system.
Wherein, it is respectively connected to the comparator in the first output end of the system power supply and system power supply second output terminal
When input terminal, the in-phase input end or inverting input of which of the two access comparator are not limited, as long as
Ensure the output voltage of the two within the scope of the assigned voltage of the input terminal of the comparator.
It is corresponding described to execute list in addition, when not limiting the output end of the comparator as high level or low level
Member is on or off, as long as ensureing when the system power supply exception, the output end of the comparator there are level overturning,
It is low level by high level overturning, or it is high level to be overturn by low level, to control the execution unit conducting, in turn
The IGBT cut-offs are controlled, i.e., the G pole tensions of the IGBT is dragged down, so that the driving unit powers off, that is, stops work
Make.
Wherein, when the voltage change of the output end of the comparator is voltage by low level overturning, to be that high level drags down described
When the G pole tensions of IGBT, the execution unit be triode, field-effect tube, optocoupler or it is silicon-controlled in any one.Its
In, the triode is managed for NPN, and the base stage of the NPN pipes connects the output end of the comparator, and collector connects the IGBT
The poles G, emitter ground connection；The field-effect tube is N-channel type field-effect tube, and the grid of the N-channel type field-effect tube connects
The output end of the comparator, drain electrode connect the poles G of the IGBT, source electrode ground connection；The anode of the optocoupler connects the comparison
The output end of device.
It is that low level drags down the IGBT when the voltage change of the output end of the comparator is voltage by high level overturning
G pole tensions when, the execution unit be triode, field-effect tube or optocoupler in any one.Wherein, the triode
For PNP pipe, the base stage of the PNP pipe connects the output end of the comparator, and emitter connects the poles G of the IGBT, collector
Ground connection；The field-effect tube is P-channel type field-effect tube, and the grid of the P-channel type field-effect tube connects the comparator
Output end, source electrode connect the poles G of the IGBT, grounded drain；The cathode of the optocoupler connects the output end of the comparator.
The embodiment of the present invention also provides a kind of power supply anomaly protection method, and the method is applied to be protected in above-mentioned abnormity of power supply
On device, as shown in Fig. 2, the method includes：
201, the output voltage of detecting system power supply the first output end and system power supply second output terminal；
202, the output voltage of the first output end of the system power supply and the system power supply second output terminal is defeated
Go out voltage；
203, according to the variation of the comparison result of output voltage, control IGBT cut-offs, so that the driving unit stops
Work.
The embodiment of the present invention is defeated by comparing the output voltage and the system power supply second of the first output end of system power supply
The output voltage of outlet, according to the variation of the comparison result of output voltage, control IGBT cut-offs, so that the driving unit stops
Only work.The embodiment of the present invention, which solves the problems, such as system power supply extremely, causes IGBT uncontrolled, ensure that when system power supply is different
Forbid IGBT open-minded when often, improves the stability of electromagnetic heating system.
Wherein, it is high level or low level that the comparison result, which is the output of the comparator,.
Further, for being ended according to the variation of the comparison result of output voltage, control IGBT described in step 203, with
So that the driving unit be stopped including：
When the comparator output be by high level overturning be low level, or by low level overturning be high level when,
The G pole tensions that the execution unit drags down the IGBT are triggered, the IGBT is forbidden to be connected, so that driving unit stops work
Make.
When there are the output electricity for when level overturning, that is, representing the first output end of the system power supply for the output of the comparator
There is variation in the output voltage of pressure or the system power supply second output terminal, i.e. the system power supply exists abnormal, described in triggering
Execution unit drags down the G pole tensions of the IGBT, and the G pole tensions of the IGBT are then judged by IGBT characteristics of itself
Whether it is less than IGBT turn-on threshold voltages, that is, judges whether the G pole tensions of the IGBT are pulled low (for example, being less than 10V), work as institute
When stating the G pole tensions of IGBT less than IGBT turn-on threshold voltages, the IGBT is forbidden to be connected, so that driving unit stops work
Make, solving the problems, such as system power supply extremely causes IGBT uncontrolled.
The embodiment of the present invention also provides a kind of electromagnetic heating system, as shown in figure 3, the electromagnetic heating system includes described
Abnormity of power supply protective device 31 further includes the main control chip 32 being connect with the first output end of system power supply and system power supply second
Output end connection rectification filtering unit 33 and with 33 sequentially connected resonant element 34 of the rectification filtering unit and driving
Unit 35, wherein the resonant element 34 includes IGBT 36, and the poles G of the IGBT are connect with the driving unit 35.
Wherein, the system power supply is configured for by mains-supplied, the rectification filtering unit to the system power supply
The voltage of second output terminal output carries out rectifying and wave-filtering；The resonant element is configured for generating single for controlling the driving
The drive signal of member；The driving unit is configured for control electromagnetic heating.
Further, as shown in figure 4, the electromagnetic heating system further includes 41 He of main control chip supply voltage processing circuit
One end of non-master control chip power voltage processing circuit 42, the main control chip supply voltage processing circuit 41 connects the system
One end of the first output end of power supply 111, the non-master control chip power voltage processing circuit 42 connects the system power supply second
Output end 112, the other end of the main control chip supply voltage processing circuit 41 are handled with the non-master control chip power voltage
The other end of circuit 42 is respectively connected to the input terminal of the comparator 12；
Wherein, the main control chip supply voltage processing circuit 41 is configured for the first output end of the system power supply
Voltage handled；The non-master control chip power voltage processing circuit 42 is configured for defeated to the system power supply second
The voltage of outlet is handled, so that the main control chip supply voltage processing circuit and the non-master control chip power electricity
Processing circuit is pressed, treated voltage is within the scope of the assigned voltage of the input terminal of the comparator.
In addition, the main control chip supply voltage processing circuit includes decompression processing circuit or boosting processing circuit.Institute
It includes decompression processing circuit or boosting processing circuit to state non-master control chip power voltage processing circuit.The decompression processing circuit
Be configured for the voltage to the first output end of the system power supply or the voltage to the system power supply second output terminal into
Row decompression is handled, and the boosting processing circuit is configured for the voltage of the first output end of the system power supply or to described
The voltage of system power supply second output terminal carries out boosting processing.The processing circuit for including for said two devices can not limit
Be boosting processing or decompression processing, also be ensure both output voltage the comparator input terminal assigned voltage model
In enclosing.
In addition, in order to ensure the main control chip supply voltage processing circuit and the non-master control chip power voltage processing
The output voltage stabilization of circuit can also include being filtered circuit in the processing circuit of the two.
By the electromagnetic heating system, the output voltage of the main control chip supply voltage processing circuit with it is described
The output voltage of non-master control chip power voltage processing circuit drags down described according to the variation of the comparison result of output voltage
The G pole tensions of IGBT, so that the driving unit is stopped.The embodiment of the present invention solves system power supply to be caused extremely
Problem uncontrolled IGBT ensure that and forbid IGBT open-minded when system power supply exception, improves the stabilization of electromagnetic heating system
Property.
As shown in figure 5, provide when the execution unit be NPN pipe, the main control chip supply voltage processing circuit and
Abnormity of power supply when the non-master control chip power voltage processing circuit is resistance decompression processing circuit protects the schematic diagram of circuit.
As shown in figure 5, the base stage of the NPN pipes connects the output end of the comparator, collector connects the poles G of the IGBT, transmitting
Pole is grounded, and when the voltage of the output end of the comparator is low level, the NPN pipes cut-off is equivalent to the collection of the NPN pipes
The poles G of electrode and the IGBT are to disconnect, to the G of the IGBT extremely without any effect.And work as system power supply and exception occur,
When the voltage of two input terminals of the i.e. described comparator has variation, it is high that the output end of the comparator, which is by low level overturning,
Level, the NPN pipes conducting, the G pole tensions of the IGBT is dragged down so that the driving unit is stopped.
Fig. 5 is only one embodiment of the present of invention, the main control chip supply voltage processing circuit and the non-master control core
Physical circuit that piece supply voltage processing circuit includes simultaneously is not fixed, and can is decompression processing circuit, be can also be at boosting
Circuit is managed, can also include filter circuit, can be configured according to physical circuit parameter, as long as ensureing the main control chip electricity
Input terminal of the output voltage of source voltage processing circuitry and the non-master control chip power voltage processing circuit in the comparator
Assigned voltage within the scope of.The execution unit can not also be limited, as long as ensureing exist when the system power supply
When abnormal, the voltage change of the output end of the comparator, to which the execution unit is connected, by the G pole tensions of the IGBT
It drags down, so that the driving unit is stopped.
The preferred embodiment of the present invention is described in detail above in association with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical scheme of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (13)
1. a kind of abnormity of power supply protective device, which is characterized in that including sequentially connected system power supply, comparator and execute list
Member, the system power supply include the first output end of system power supply and system power supply second output terminal, and the system power supply first is defeated
Outlet and system power supply second output terminal are respectively connected to the input terminal of the comparator, and the output end of the comparator is held with described
Row unit connects, and the poles G of the execution unit and insulated gate bipolar transistor IGBT connect, the poles G and the driving of the IGBT
Unit is connected and is powered to the driving unit；
Wherein, the execution unit is configured as, the voltage of the output end of comparator when according to the system power supply exception
Variation, the G pole tensions of the IGBT is dragged down, so that the driving unit is stopped.
2. abnormity of power supply protective device according to claim 1, which is characterized in that the voltage of the output end of the comparator
It is high level that variation be voltage to be overturn by low level.
3. abnormity of power supply protective device according to claim 2, which is characterized in that the execution unit is triode, field
Effect pipe, optocoupler or it is silicon-controlled in any one, wherein the triode be NPN pipe, the NPN pipes base stage connection
The output end of the comparator, collector connect the poles G of the IGBT, emitter ground connection；The field-effect tube is N-channel type field
The grid of effect pipe, the N-channel type field-effect tube connects the output end of the comparator, and drain electrode connects the poles G of the IGBT,
Source electrode is grounded；The anode of the optocoupler connects the output end of the comparator.
4. abnormity of power supply protective device according to claim 1, which is characterized in that the voltage of the output end of the comparator
It is low level that variation be voltage to be overturn by high level.
5. abnormity of power supply protective device according to claim 4, which is characterized in that the execution unit is triode, field
Any one in effect pipe or optocoupler, wherein the triode is PNP pipe, and the base stage of the PNP pipe connects the comparison
The output end of device, emitter connect the poles G of the IGBT, grounded collector；The field-effect tube is P-channel type field-effect tube,
The grid of the P-channel type field-effect tube connects the output end of the comparator, and source electrode connects the poles G of the IGBT, and drain electrode connects
Ground；The cathode of the optocoupler connects the output end of the comparator.
6. a kind of power supply anomaly protection method, which is characterized in that the method is applied described in the claims any one of 1-5
Abnormity of power supply protective device on, the method includes：
The output voltage of detecting system power supply the first output end and system power supply second output terminal；
Compare the output voltage of the output voltage and the system power supply second output terminal of the first output end of the system power supply；
According to the variation of the comparison result of output voltage, control IGBT cut-offs, so that the driving unit is stopped.
7. power supply anomaly protection method according to claim 6, which is characterized in that the comparison knot according to output voltage
The variation of fruit, control IGBT cut-off so that the driving unit be stopped including：
When the comparator output be by high level overturning be low level, or by low level overturning be high level when, triggering
The execution unit drags down the G pole tensions of the IGBT, forbids the IGBT to be connected, so that driving unit is stopped.
8. a kind of electromagnetic heating system, which is characterized in that the electromagnetic heating system includes any one of the claims 1-5 institutes
The abnormity of power supply protective device stated further includes the main control chip being connect with the first output end of system power supply and system power supply second
Output end connection rectification filtering unit and with the sequentially connected resonant element of the rectification filtering unit and driving unit,
Wherein, the resonant element includes IGBT, and the poles G of the IGBT are connect with the driving unit,
The rectification filtering unit is configured for carrying out rectifying and wave-filtering to the voltage that the system power supply second output terminal exports；
The resonant element is configured for generating the drive signal for controlling the driving unit；
The driving unit is configured for control electromagnetic heating.
9. electromagnetic heating system according to claim 8, which is characterized in that the electromagnetic heating system further includes master control core
Piece supply voltage processing circuit and non-master control chip power voltage processing circuit, the main control chip supply voltage processing circuit
One end connects first output end of system power supply, and one end of the non-master control chip power voltage processing circuit connects the system
System power supply second output terminal, the other end of the main control chip supply voltage processing circuit and the non-master control chip power voltage
The other end of processing circuit is respectively connected to the input terminal of the comparator；
Wherein, the main control chip supply voltage processing circuit is configured for the voltage to the first output end of the system power supply
It is handled, so that treated voltage is within the scope of the assigned voltage of the input terminal of the comparator；
The non-master control chip power voltage processing circuit be configured for the voltage of the system power supply second output terminal into
Row processing, so that treated voltage is within the scope of the assigned voltage of the input terminal of the comparator.
10. electromagnetic heating system according to claim 9, which is characterized in that the main control chip supply voltage processing electricity
Road includes that decompression processing circuit or boosting processing circuit, the decompression processing circuit are configured for the system power supply the
The voltage of one output end carries out decompression processing, and the boosting processing circuit is configured for the first output end of the system power supply
Voltage carry out boosting processing.
11. electromagnetic heating system according to claim 10, which is characterized in that the main control chip supply voltage processing electricity
Road further includes being filtered circuit with what decompression processing circuit or the processing circuit that boosts were connect, it is described be filtered circuit by with
It sets and is filtered for the voltage to the first output end of the system power supply.
12. electromagnetic heating system according to claim 9, which is characterized in that the non-master control chip power voltage processing
Circuit includes that decompression processing circuit or boosting processing circuit, the decompression processing circuit are configured for the system power supply
The voltage of second output terminal carries out decompression processing, and the boosting processing circuit is configured for the second outlet of the system power supply
Voltage carry out boosting processing.
13. electromagnetic heating system according to claim 12, which is characterized in that the non-master control chip power voltage processing
Circuit further includes the circuit that is filtered being connect with decompression processing circuit or the processing circuit that boosts, described to be filtered circuit quilt
It is configured to be filtered the voltage of the system power supply second output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710307531.9A CN108811214A (en) | 2017-05-04 | 2017-05-04 | Power supply anomaly protection method, device and electromagnetic heating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710307531.9A CN108811214A (en) | 2017-05-04 | 2017-05-04 | Power supply anomaly protection method, device and electromagnetic heating system |
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| Publication Number | Publication Date |
|---|---|
| CN108811214A true CN108811214A (en) | 2018-11-13 |
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| CN201710307531.9A Pending CN108811214A (en) | 2017-05-04 | 2017-05-04 | Power supply anomaly protection method, device and electromagnetic heating system |
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| CN105430783A (en) * | 2015-12-22 | 2016-03-23 | 东莞市精诚电能设备有限公司 | Induction cooker circuit |
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| CN206004293U (en) * | 2016-07-21 | 2017-03-08 | 浙江绍兴苏泊尔生活电器有限公司 | IGBT (insulated Gate Bipolar transistor) under-voltage protection circuit and induction cooker |
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| CN201178498Y (en) * | 2008-04-03 | 2009-01-07 | 深圳和而泰智能控制股份有限公司 | Surge protection circuit for electromagentic furnace |
| CN201310947Y (en) * | 2008-10-09 | 2009-09-16 | 浙江苏泊尔家电制造有限公司 | Electromagnetic oven with low standby power consumption |
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