CN206713095U - Abnormity of power supply protection device and electromagnetic heating system - Google Patents
Abnormity of power supply protection device and electromagnetic heating system Download PDFInfo
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- CN206713095U CN206713095U CN201720485594.9U CN201720485594U CN206713095U CN 206713095 U CN206713095 U CN 206713095U CN 201720485594 U CN201720485594 U CN 201720485594U CN 206713095 U CN206713095 U CN 206713095U
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Abstract
Field of circuit technology is the utility model is related to, discloses a kind of abnormity of power supply protection device and electromagnetic heating system, solves the problems, such as that system power supply causes IGBT uncontrolled extremely.Abnormity of power supply protection device includes the system power supply being sequentially connected, comparator and execution unit, system power supply includes the output end of system power supply first and the output end of system power supply second, the output end of system power supply first and the output end of system power supply second are respectively connected to the input of comparator, the output end of comparator is connected with execution unit, the G poles of execution unit and insulated gate bipolar transistor IGBT connect, IGBT G poles are connected with driver element and powered to driver element, execution unit is configured as the voltage change according to the output end of comparator during system power supply exception, IGBT G pole tensions are dragged down, to cause driver element to be stopped.During abnormity of power supply detection process of the utility model embodiment suitable for electromagnetic heating system.
Description
Technical field
Field of circuit technology is the utility model is related to, in particular it relates to a kind of abnormity of power supply protection 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 needs upper electricity, power down simultaneously, but because actual application environment has the interference such as power network fluctuation, abnormal signal, causes
IGBT driving voltages cannot be guaranteed that electricity and power down can be gone up simultaneously with main control chip supply voltage, existing in order to solve the above problems
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 functional modules in electromagnetic heating system
It is uncontrolled, for example, can not stop immediately during main control chip supply voltage exception IGBT driving, cause IGBT driving voltages not by
Control, the serious consequence such as electromagnetic heating system may be caused on fire.
Utility model content
The purpose of this utility model is to provide a kind of abnormity of power supply protection device and electromagnetic heating system, solves system electricity
The problem of source causes IGBT uncontrolled extremely, it ensure that and forbid IGBT open-minded when system power supply exception, improve Electromagnetic Heating
The stability of system.
To achieve these goals, the utility model provides a kind of abnormity of power supply protection device, including what is be sequentially connected is
System power supply, comparator and execution unit, the system power supply includes the output end of system power supply first and system power supply second exports
End, the output end of system power supply first and system power supply second output end is respectively connected to the input of the comparator, described
The output end of comparator is connected with the execution unit, and the G poles of the execution unit and insulated gate bipolar transistor IGBT connect
Connect, the G poles of the IGBT are connected with driver element and powered to the driver element；
Wherein, the execution unit is configured as the electricity according to the output end of the comparator during system power supply exception
Buckling, the G pole tensions of the IGBT are dragged down, to cause the driver element to be stopped.
Optionally, it is high level that the voltage change of the output end of the comparator, which is voltage by low level upset,.
Optionally, the execution unit is any one in triode, FET, optocoupler or controllable silicon, wherein,
The triode is managed for NPN, and the base stage of the NPN pipes connects the output end of the comparator, and colelctor electrode connects the G of the IGBT
Pole, grounded emitter；The FET is N-channel type FET, described in the grid connection of the N-channel type FET
The output end of comparator, drain electrode connect the G poles of the IGBT, source ground；The positive pole 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 upset,.
Optionally, the execution unit is any one in triode, FET 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 stage connects the G poles of the IGBT, collection
Electrode is grounded；The FET is P-channel type FET, and the grid of the P-channel type FET connects the comparison
The output end of device, source electrode connect the G poles of the IGBT, grounded drain；The negative pole of the optocoupler connects the output of the comparator
End.
The utility model embodiment also provides a kind of electromagnetic heating system, and it is different that the electromagnetic heating system includes the power supply
Normal protection device, in addition to be connected with the output end of system power supply first main control chip, be connected with the output end of system power supply second
Rectification filtering unit and the resonant element and driver element that are sequentially connected with the rectification filtering unit, wherein, it is described humorous
The unit that shakes includes IGBT, and the G poles of the IGBT are connected with the driver element,
The rectification filtering unit is arranged to carry out rectification to the voltage of the output end of system power supply second output
Filtering；
The resonant element is arranged to produce the drive signal for being used for controlling the driver element；
The driver element is arranged to control Electromagnetic Heating.
Optionally, the electromagnetic heating system also includes main control chip supply voltage process circuit and non-master control chip power
Voltage processing circuitry, one end of the main control chip supply voltage process circuit connect the output end of system power supply first, institute
The one end for stating non-master control chip power voltage process circuit connects the output end of system power supply second, the main control chip power supply
The other end of the other end of voltage processing circuitry and the non-master control chip power voltage process circuit is respectively connected to the comparison
The input of device；
Wherein, the main control chip supply voltage process circuit is arranged to the output end of system power supply first
Voltage is handled, to cause the voltage after processing in the range of the assigned voltage of the input of the comparator；
The non-master control chip power voltage process circuit is arranged to the electricity to the output end of system power supply second
Pressure is handled, to cause the voltage after processing in the range of the assigned voltage of the input of the comparator.
Optionally, the main control chip supply voltage process circuit includes decompression process circuit or boosting process circuit,
The decompression process circuit is arranged to carry out decompression processing, the boosting to the voltage of the output end of system power supply first
Process circuit is arranged to carry out boosting processing to the voltage of the output end of system power supply first.
Optionally, the main control chip supply voltage process circuit also includes and decompression process circuit or boosting processing electricity
The filtering process circuit of road connection, the filtering process circuit are arranged to the voltage to the output end of system power supply first
It is filtered processing.
Optionally, the non-master control chip power voltage process circuit includes decompression process circuit or boosting processing electricity
Road, the decompression process circuit is arranged to carry out decompression processing to the voltage of the output end of system power supply second, described
The voltage that boosting process circuit is arranged to the system power supply second end carries out boosting processing.
Optionally, the non-master control chip power voltage process circuit also includes handling with decompression process circuit or boosting
The filtering process circuit of circuit connection, the filtering process circuit are arranged to the electricity to the output end of system power supply second
Pressure carries out filtering process.
Pass through above-mentioned technical proposal, by the way that the output end of system power supply first and the output end of system power supply second are respectively connected to
The input of the comparator, when system power supply is present it is abnormal when, pass through the voltage change of the output end of comparator, control IGBT
Cut-off, to cause the driver element to be stopped.The utility model embodiment solves system power supply causes IGBT not extremely
The problem of controlled, 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 utility model will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is to be further understood for providing to of the present utility model, and a part for constitution instruction, and following
Embodiment be used to explain the utility model together, but do not form to limitation of the present utility model.In the accompanying drawings：
Fig. 1 is a kind of schematic diagram for abnormity of power supply protection device that the utility model embodiment provides；
Fig. 2 is the execution flow chart for the abnormity of power supply protection device that the utility model embodiment provides；
Fig. 3 is a kind of schematic diagram for electromagnetic heating system that the utility model embodiment provides；
Fig. 4 is the schematic diagram for another electromagnetic heating system that the utility model embodiment provides；
Fig. 5 is the circuit diagram for another electromagnetic heating system that the utility model embodiment provides.
Embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.It should be appreciated that herein
Described embodiment is merely to illustrate and explained the utility model, is not limited to the utility model.
The utility model embodiment provides a kind of abnormity of power supply protection device, as shown in figure 1, the system including being sequentially connected
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, first output end of system power supply 111 and the second output end of system power supply 112 are respectively connected to the ratio
Compared with the input of device 12, the output end of the comparator 12 is connected with the execution unit 13, the execution unit 13 and insulation
The G poles connection of grid bipolar transistor IGBT (not shown), the G poles of the IGBT are connected simultaneously with driver element (not shown)
Powered to the driver element；
Wherein, the execution unit 13 is configured as the output end of the comparator 12 during according to the system power supply exception
Voltage change, the G pole tensions of the IGBT are dragged down, to cause the driver element to be stopped.
The utility model embodiment is by the way that the output end of system power supply first and the output end of system power supply second are respectively connected to
The input of comparator, when system power supply is present it is abnormal when, by the voltage change of the output end of comparator, by the IGBT's
G pole tensions are dragged down so as to so that the driver element is stopped.The utility model embodiment solves system power supply exception
The problem of causing IGBT uncontrolled, it ensure that and forbid IGBT open-minded when system power supply exception, improve electromagnetic heating system
Stability.
Wherein, it is respectively connected to the comparator in the output end of system power supply first and the output end of system power supply second
During input, 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 in the range of the assigned voltage of the input of the comparator.
It is corresponding described to perform 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 has level upset,
It is low level i.e. by high level upset, or it is high level to be overturn by low level, so as to control the execution unit to turn on, and then
Control the IGBT to end, will the G pole tensions of the IGBT drag down so that the driver element powers off, that is, stop work
Make.
Wherein, when the voltage change of the output end of the comparator is voltage by low level upset, to be that high level drags down described
During IGBT G pole tensions, the execution unit is any one in triode, FET, optocoupler or controllable silicon.Its
In, the triode is managed for NPN, and the base stage of the NPN pipes connects the output end of the comparator, and colelctor electrode connects the IGBT
G poles, grounded emitter；The FET is N-channel type FET, and the grid of the N-channel type FET connects
The output end of the comparator, drain electrode connect the G poles of the IGBT, source ground；The positive pole 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 upset
G pole tensions when, the execution unit be triode, FET 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 stage connects the G poles of the IGBT, colelctor electrode
Ground connection；The FET is P-channel type FET, and the grid of the P-channel type FET connects the comparator
Output end, source electrode connect the G poles of the IGBT, grounded drain；The negative pole of the optocoupler connects the output end of the comparator.
The execution flow of above-mentioned abnormity of power supply protection device is as shown in Fig. 2 comprise the following steps：
201st, the output voltage of the output end of detecting system power supply first and the output end of system power supply second；
202nd, the output voltage of the output end of system power supply first and the output end of system power supply second is defeated
Go out voltage；
203rd, according to the change of the comparative result of output voltage, control IGBT cut-offs, to cause the driver element to stop
Work.
Wherein, the comparative result is that the output of the comparator is high level or low level.
Further, the change of the comparative result according to output voltage, control IGBT cut-offs, to cause the driving
Unit be stopped including：
When the comparator output be by high level upset be low level, or by low level upset be high level when,
The G pole tensions that the execution unit drags down the IGBT are triggered, forbid the IGBT to turn on, to cause driver element to stop work
Make.
When the output of the comparator has level upset, that is, represent the output electricity of the output end of system power supply first
There is change in the output voltage of pressure or the output end of the system power supply second, i.e. the system power supply is present 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 IGBT G pole tensions and being less than IGBT turn-on threshold voltages, the IGBT is forbidden to turn on, to cause driver element to stop work
Make, solve the problems, such as that system power supply causes IGBT uncontrolled extremely.
The utility model embodiment also provides a kind of electromagnetic heating system, as shown in figure 3, the electromagnetic heating system includes
The abnormity of power supply protection device 31, in addition to the main control chip 32 and system power supply being connected with the output end of system power supply first
The rectification filtering unit 33 and the resonant element 34 that is sequentially connected with the rectification filtering unit 33 of the connection of second output end and
Driver element 35, wherein, the resonant element 34 includes IGBT 36, and the G poles of the IGBT connect with the driver element 35
Connect.
Wherein, the system power supply is arranged to the system power supply by mains-supplied, the rectification filtering unit
The voltage of second output end output carries out rectifying and wave-filtering；The resonant element, which is arranged to produce, to be used to control the driving single
The drive signal of member；The driver element is arranged to control Electromagnetic Heating.
Further, as shown in figure 4, the electromagnetic heating system also includes the He of main control chip supply voltage process circuit 41
Non- master control chip power voltage process circuit 42, one end of the main control chip supply voltage process circuit 41 connect the system
The first output end of power supply 111, one end of the non-master control chip power voltage process circuit 42 connect the system power supply second
Output end 112, the other end of the main control chip supply voltage process circuit 41 are handled with the non-master control chip power voltage
The other end of circuit 42 is respectively connected to the input of the comparator 12；
Wherein, the main control chip supply voltage process circuit 41 is arranged to the output end of system power supply first
Voltage handled；The non-master control chip power voltage process circuit 42 is arranged to defeated to the system power supply second
The voltage for going out end is handled, so that the main control chip supply voltage process circuit and the non-master control chip power electricity
Process circuit is pressed, the voltage after processing is in the range of the assigned voltage of the input of the comparator.
In addition, the main control chip supply voltage process circuit includes decompression process circuit or boosting process circuit.Institute
Stating non-master control chip power voltage process circuit includes decompression process circuit or boosting process circuit.The decompression process circuit
It is arranged to the voltage of the output end of system power supply first or the voltage of the output end of system power supply second is entered
Row decompression is handled, and the boosting process circuit is arranged to the voltage of the output end of system power supply first or to described
The voltage of the output end of system power supply second carries out boosting processing.The process circuit included for said two devices can not limit
It is boosting processing or decompression processing, is also the assigned voltage model for ensureing the output voltage of the two in the input of the comparator
In enclosing.
In addition, in order to ensure the main control chip supply voltage process circuit and the non-master control chip power voltage processing
The output voltage stabilization of circuit, filtering process circuit can also be included in the process circuit of the two.
By the electromagnetic heating system, the output voltage of the main control chip supply voltage process circuit with it is described
The output voltage of non-master control chip power voltage process circuit, according to the change of the comparative result of output voltage, drag down described
IGBT G pole tensions, to cause the driver element to be stopped.The utility model embodiment solves system power supply and led extremely
The problem of causing IGBT uncontrolled, ensure that and forbid IGBT open-minded when system power supply exception, improve the steady of electromagnetic heating system
It is qualitative.
As shown in Figure 5, there is provided when the execution unit be NPN pipe, the main control chip supply voltage process circuit and
The schematic diagram of abnormity of power supply protection circuit when the non-master control chip power voltage process circuit is resistance decompression process circuit.
As shown in figure 5, the base stage of the NPN pipes connects the output end of the comparator, colelctor electrode connects the G poles of the IGBT, transmitting
Pole is grounded, when the voltage of the output end of the comparator is low level, the NPN pipes cut-off, equivalent to the collection of the NPN pipes
Electrode and the IGBT G poles are to disconnect, the extremely no any effects of G to the IGBT.And work as system power supply and exception occur,
When the voltage of two inputs of i.e. described comparator has change, it by low level upset is high that the output end of the comparator, which is,
Level, the NPN pipes conducting, the G pole tensions of the IGBT is dragged down so that the driver element is stopped.
Fig. 5 is only one embodiment of the present utility model, the main control chip supply voltage process circuit and described non-master
The physical circuit that control chip power voltage process circuit includes is not fixed, and can be decompression process circuit or liter
Process circuit is pressed, filter circuit can also be included, can be configured according to physical circuit parameter, as long as ensureing the master control core
The output voltage of piece supply voltage process circuit and the non-master control chip power voltage process circuit is in the defeated of the comparator
Enter in the range of the assigned voltage at end.It can not also be limited for the execution unit, as long as ensureing to work as the system power supply
In the presence of it is abnormal when, the voltage change of the output end of the comparator, so as to the execution unit turn on, by the G poles of the IGBT
Voltage pull-down, to cause the driver element to be stopped.
Preferred embodiment of the present utility model, still, the utility model and unlimited is described in detail above in association with accompanying drawing
Detail in above-mentioned embodiment, can be to skill of the present utility model in range of the technology design of the present utility model
Art scheme carries out a variety of simple variants, and these simple variants belong to the scope of protection of the utility model.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the utility model is to each
The possible combination of kind no longer separately illustrates.
In addition, it can also be combined between a variety of embodiments of the present utility model, as long as it is not disobeyed
Thought of the present utility model is carried on the back, it should equally be considered as content disclosed in the utility model.
Claims (11)
- A kind of 1. abnormity of power supply protection device, it is characterised in that including be sequentially connected system power supply, comparator and perform list Member, the system power supply include the output end of system power supply first and the output end of system power supply second, and the system power supply first is defeated Go out end and the output end of system power supply second is respectively connected to the input of the comparator, the output end of the comparator is held with described Row unit connects, the G poles connection of the execution unit and insulated gate bipolar transistor IGBT, G poles and the driving of the IGBT Unit is connected and powered to the driver element；Wherein, the execution unit is configured as, according to the voltage of the output end of the comparator during system power supply exception Change, the G pole tensions of the IGBT is dragged down, to cause the driver element to be stopped.
- 2. abnormity of power supply protection device according to claim 1, it is characterised in that the voltage of the output end of the comparator Change turns to voltage and overturn by low level as high level.
- 3. abnormity of power supply protection device according to claim 2, it is characterised in that the execution unit is triode, field Any one in effect pipe, optocoupler or controllable silicon, wherein, the triode is NPN pipes, the base stage connection of the NPN pipes The output end of the comparator, colelctor electrode connect the G poles of the IGBT, grounded emitter；The FET is N-channel type field Effect pipe, the grid of the N-channel type FET connect the output end of the comparator, and drain electrode connects the G poles of the IGBT, Source ground；The positive pole of the optocoupler connects the output end of the comparator.
- 4. abnormity of power supply protection device according to claim 1, it is characterised in that the voltage of the output end of the comparator Change turns to voltage and overturn by high level as low level.
- 5. abnormity of power supply protection device according to claim 4, it is characterised 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 stage connect the G poles of the IGBT, grounded collector；The FET is P-channel type FET, The grid of the P-channel type FET connects the output end of the comparator, and source electrode connects the G poles of the IGBT, and drain electrode connects Ground；The negative pole of the optocoupler connects the output end of the comparator.
- 6. a kind of electromagnetic heating system, it is characterised in that the electromagnetic heating system includes any one of the claims 1-5 institute The abnormity of power supply protection device stated, in addition to the main control chip and system power supply second being connected with the output end of system power supply first The rectification filtering unit of output end connection and the resonant element and driver element being sequentially connected with the rectification filtering unit, Wherein, the resonant element includes IGBT, and the G poles of the IGBT are connected with the driver element,The rectification filtering unit is arranged to carry out rectifying and wave-filtering to the voltage of the output end of system power supply second output；The resonant element is arranged to produce the drive signal for being used for controlling the driver element；The driver element is arranged to control Electromagnetic Heating.
- 7. electromagnetic heating system according to claim 6, it is characterised in that the electromagnetic heating system also includes master control core Piece supply voltage process circuit and non-master control chip power voltage process circuit, the main control chip supply voltage process circuit One end connects the output end of system power supply first, and one end of the non-master control chip power voltage process circuit connects the system The system output end of power supply second, the other end of the main control chip supply voltage process circuit and the non-master control chip power voltage The other end of process circuit is respectively connected to the input of the comparator；Wherein, the main control chip supply voltage process circuit is arranged to the voltage to the output end of system power supply first Handled, to cause the voltage after processing in the range of the assigned voltage of the input of the comparator；The non-master control chip power voltage process circuit is arranged to enter the voltage of the output end of system power supply second Row processing, to cause the voltage after processing in the range of the assigned voltage of the input of the comparator.
- 8. electromagnetic heating system according to claim 7, it is characterised in that the main control chip supply voltage process circuit Including decompression process circuit or boosting process circuit, the decompression process circuit is arranged to the system power supply first The voltage of output end carries out decompression processing, and the boosting process circuit is arranged to the output end of system power supply first Voltage carries out boosting processing.
- 9. electromagnetic heating system according to claim 8, it is characterised in that the main control chip supply voltage process circuit Also include the filtering process circuit being connected with decompression process circuit or the process circuit that boosts, the filtering process circuit is configured For being filtered processing to the voltage of the output end of system power supply first.
- 10. electromagnetic heating system according to claim 7, it is characterised in that the non-master control chip power voltage processing Circuit includes decompression process circuit or boosting process circuit, and the decompression process circuit is arranged to the system power supply The voltage of second output end carries out decompression processing, and the boosting process circuit is arranged to go out end to the system power supply second Voltage carry out boosting processing.
- 11. electromagnetic heating system according to claim 10, it is characterised in that the non-master control chip power voltage processing Circuit also includes the filtering process circuit being connected with decompression process circuit or the process circuit that boosts, the filtering process circuit quilt It is configured to be filtered processing to the voltage of the output end of system power supply second.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720485594.9U CN206713095U (en) | 2017-05-04 | 2017-05-04 | Abnormity of power supply protection device and electromagnetic heating system |
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| CN201720485594.9U CN206713095U (en) | 2017-05-04 | 2017-05-04 | Abnormity of power supply protection device and electromagnetic heating system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108811214A (en) * | 2017-05-04 | 2018-11-13 | 佛山市顺德区美的电热电器制造有限公司 | Power supply anomaly protection method, device and electromagnetic heating system |
| CN109612544A (en) * | 2018-11-30 | 2019-04-12 | 重庆前卫克罗姆表业有限责任公司 | A kind of gas meter, flow meter that can passively switch power supply |
| CN112072614A (en) * | 2020-09-16 | 2020-12-11 | 广东长虹电子有限公司 | Power tube with thermal protection function and circuit system |
-
2017
- 2017-05-04 CN CN201720485594.9U patent/CN206713095U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108811214A (en) * | 2017-05-04 | 2018-11-13 | 佛山市顺德区美的电热电器制造有限公司 | Power supply anomaly protection method, device and electromagnetic heating system |
| CN108811214B (en) * | 2017-05-04 | 2024-08-23 | 佛山市顺德区美的电热电器制造有限公司 | Power supply abnormality protection method and device and electromagnetic heating system |
| CN109612544A (en) * | 2018-11-30 | 2019-04-12 | 重庆前卫克罗姆表业有限责任公司 | A kind of gas meter, flow meter that can passively switch power supply |
| CN109612544B (en) * | 2018-11-30 | 2024-03-26 | 重庆前卫表业有限公司 | Gas meter capable of passively switching power supply |
| CN112072614A (en) * | 2020-09-16 | 2020-12-11 | 广东长虹电子有限公司 | Power tube with thermal protection function and circuit system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |