CN206223856U - Electromagnetic Heating zero passage detection and voltage sampling circuit - Google Patents
Electromagnetic Heating zero passage detection and voltage sampling circuit Download PDFInfo
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- CN206223856U CN206223856U CN201621007045.2U CN201621007045U CN206223856U CN 206223856 U CN206223856 U CN 206223856U CN 201621007045 U CN201621007045 U CN 201621007045U CN 206223856 U CN206223856 U CN 206223856U
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- sampling circuit
- electromagnetic heating
- passage detection
- voltage
- zero passage
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- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000005070 sampling Methods 0.000 title claims abstract description 27
- 238000010438 heat treatment Methods 0.000 title claims abstract description 21
- 239000003990 capacitor Substances 0.000 claims abstract description 11
- 230000005611 electricity Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
A kind of Electromagnetic Heating zero passage detection of the present utility model and voltage sampling circuit, it includes rectification module, division module, voltage comparator, A/D converter and MCU, the division module includes first divider resistance and the second divider resistance of series connection, and the filter capacitor in parallel with second divider resistance, partial pressure output end is formed at tie point between first divider resistance and second divider resistance, wherein, the input of the input of the voltage comparator and the A/D converter is connected to the partial pressure output end.By being arranged such so that zero cross detection circuit shares rectification module and division module with voltage sampling circuit, reduces the usage quantity of electronic component, reduces the complexity of circuit, reduces cost.
Description
Technical field
The utility model is related to field of kitchen electric appliance, more particularly to a kind of Electromagnetic Heating zero passage detection and voltage sample electricity
Road.
Background technology
Existing Electromagnetic Heating zero cross detection circuit and voltage sampling circuit are usually two separate circuits, wherein zero passage
Detection circuit is usually：Alternating current connecting triode after partial pressure, when alternating current voltage value is not zero, triode cut-off；When
When alternating current voltage value is zero, triode ON, so that the output end of zero cross detection circuit exports different low and high levels,
Realize zero passage detection.And voltage sampling circuit is usually：Alternating current is rectified, partial pressure, be input into chip AD conversion mouthful after filtering,
Realize that sampled voltage is detected.Because two circuits are to be provided separately, introduced from high pressure civil power respectively, rectification, partial pressure etc. carried out respectively,
So that circuit is complicated, the use of the electronic component such as resistance, diode is more, causes cost to increase.
Thus, it is necessory to provide a kind of technical scheme, with the defect for overcoming above-mentioned prior art to exist.
Utility model content
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art and provide a kind of simple structure
Electromagnetic Heating zero passage detection and voltage sampling circuit.
In order to achieve the above object, the technical solution of the utility model is as follows：
A kind of Electromagnetic Heating zero passage detection and voltage sampling circuit, it include rectification module, division module, voltage ratio compared with
Device, A/D converter and MCU, the division module include series connection the first divider resistance and the second divider resistance, and with it is described
Second divider resistance filter capacitor in parallel, shape at the tie point between first divider resistance and second divider resistance
Into partial pressure output end, wherein, the input of the input of the voltage comparator and the A/D converter is connected to described point
Pressure output end.
In the embodiment of the utility model one, the A/D converter is integrated in the MCU.
In the embodiment of the utility model one, the voltage comparator is integrated in the MCU.
In the embodiment of the utility model one, on the connection line between the A/D converter and the partial pressure output end
It is provided with gate-controlled switch.
In the embodiment of the utility model one, the in-phase input end of the A/D converter and the voltage comparator or anti-
One of phase input is connected, and another in the in-phase input end and inverting input is connected with D/A converter.
In the embodiment of the utility model one, the voltage comparator and the A/D converter use same I/O interfaces.
In the embodiment of the utility model one, the voltage comparator and the A/D converter use separate two
Individual I/O interfaces.
In the embodiment of the utility model one, the filter capacitor is patch capacitor.
A kind of Electromagnetic Heating zero passage detection of the present utility model and voltage sampling circuit, it includes rectification module, partial pressure
Module, voltage comparator, A/D converter and MCU, the division module include the first divider resistance and the second partial pressure electricity of series connection
Resistance, and the filter capacitor in parallel with second divider resistance, first divider resistance and second divider resistance it
Between tie point at formed partial pressure output end, wherein, the input of the input of the voltage comparator and the A/D converter
It is connected to the partial pressure output end.By being arranged such so that zero cross detection circuit shares rectification mould with voltage sampling circuit
Block and division module, reduce the usage quantity of electronic component, reduce the complexity of circuit, reduce cost.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
The required accompanying drawing for using is briefly described, it should be apparent that, drawings in the following description are only of the present utility model one
A little embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is the partial circuit diagram of the utility model Electromagnetic Heating zero passage detection and voltage sampling circuit；
Fig. 2 is the voltage wave that the utility model Electromagnetic Heating zero passage detection and voltage sampling circuit partial pressure output end are exported
Shape figure.
Reference：
1- rectification modules；2- division modules；21- partial pressure output ends；3- voltage comparators；4-A/D converters；41- is controllable
Switch；L1- live wires；N1- zero lines；F1- fuses；D4- diodes；The divider resistances of R14- first；The divider resistances of R24- second；
C16- filter capacitors.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
Fig. 1 to Fig. 2 is referred to, the utility model provides a kind of Electromagnetic Heating zero passage detection and voltage sampling circuit, its
Can be used on the Electromagnetic Heating products such as electromagnetic oven, IH electric cookers, IH pressure cookers.Live wire L1 and the zero of civil power of the circuit from civil power
Line N1 is introduced, and fuse F1 is additionally provided with live wire L1.The zero passage detection and voltage sampling circuit include rectification module 1 and whole
The division module 2 of the connection of flow module 1 and the voltage comparator 3, A/D converter 4 and the MCU (Micro- that are connected with division module 2
Controller Unit, micro-control unit).In the present embodiment, the rectification module 1 is diode D4, the division module
2 with the output end for stating rectification module 1 be connected, be used to carry out voltage division processing to the signal after the rectification of rectified module 1.Described point
Die block 2 includes the first divider resistance R14 and the second divider resistance R24 of series connection, and in parallel with second divider resistance
Filter capacitor C16, the filter capacitor C16 is patch capacitor.The first divider resistance R14 and second divider resistance
Partial pressure output end 21 is formed at tie point between R24, the partial pressure output end 21 is used to the signal transmission after voltage division processing
Respective handling is carried out to subsequent conditioning circuit.After through voltage division processing, the voltage I waveforms at partial pressure output end 21 are as shown in Fig. 2 wherein
A points are the zero crossing of exchange point.
The input of the voltage comparator 3 and the A/D converter 4 is connected to the partial pressure output end 21, i.e. institute
State zero cross detection circuit and shared rectification and division module with the voltage sampling circuit, so as to save a set of rectification and partial pressure
Module, reduces the usage quantity of electronic component, reduces cost.The input of the voltage comparator 3 includes homophase input
End and inverting input, the A/D converter 4 are connected with the in-phase input end or the inverting input.The A/D conversions
Gate-controlled switch 41 is additionally provided with connection line between device 4 and the partial pressure output end 21, to control zero passage detection to be adopted with voltage
The time-division processing of sample.
In the preferred embodiment of the utility model one, the voltage comparator 3 and/or the A/D converter 4 can be integrated in
In the MCU, by integrated voltage comparator 3 in MCU, and internal AD conversion so that peripheral circuit can be shared, and periphery
The simple structure of circuit.In the present embodiment, the A/D converter 4 is built in the in-phase input end of the voltage comparator 3,
D/A converter 5 is also associated with the inverting input of the voltage comparator 3, is changed using D/A, provided to voltage comparator
Reference voltage, can adjust zero cross fired voltage, and the triggered time is adjustable so that treatment of the program to zero crossing more rationally may be used
Control.
Preferably, the voltage comparator 3 and the A/D converter 4 use two separate I/O interfaces, use
Independent I/O mouthfuls, A/D samplings will not be clashed with voltage comparator 4, thus can integrated high-precision A/D converters so that electric
Pressure sampling precision is higher.Certainly, according to the actual requirements, it is also possible to which voltage comparator and the A/D converter are used into same I/O
Interface, using same interface, can reduce interface quantity, reduces cost.
A kind of Electromagnetic Heating zero passage detection of the present utility model and voltage sampling circuit, by by zero cross detection circuit with
Voltage sampling circuit shares rectification module 1 and division module 2, reduces the usage quantity of electronic component, reduces circuit
Complexity, reduces cost；Can be integrated in the MCU by by voltage comparator 3 and the A/D converter 4 so that outward
Enclosing circuit can share, and peripheral circuit simple structure；In one embodiment, by voltage comparator 3 and the A/D converter
4 use two separate I/O interfaces, thus can integrated high-precision A/D converters so that voltage sample precision is higher.
In description of the present utility model, it is to be understood that term " " center ", " transverse direction ", " thickness ", " on ", D score,
The orientation or position relationship of the instruction such as " vertical ", " level ", " top ", " bottom ", " interior ", " outward ", " radial direction ", " circumference " are based on attached
The shown orientation of figure or position relationship, are for only for ease of and describe the utility model and simplify to describe, rather than instruction or hint
Signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
The limitation of utility model.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In description of the present utility model, " multiple " is meant that two or two
More than, unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be
Be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two element internals connection or two elements it is mutual
Interactively.For the ordinary skill in the art, can as the case may be understand that above-mentioned term is new in this practicality
Concrete meaning in type.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score
Can be the first and second feature directly contacts, 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
Represent that fisrt feature level height is higher than second feature.
The above, specific embodiment only of the present utility model, but protection domain of the present utility model do not limit to
In this, any one skilled in the art in the technical scope that the utility model is disclosed, the change that can be readily occurred in
Change or replace, should all cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with right
It is required that protection domain be defined.
Claims (8)
1. a kind of Electromagnetic Heating zero passage detection and voltage sampling circuit, it include rectification module, division module, voltage ratio compared with
Device, A/D converter and MCU, the division module include series connection the first divider resistance and the second divider resistance, and with it is described
Second divider resistance filter capacitor in parallel, shape at the tie point between first divider resistance and second divider resistance
Into partial pressure output end, it is characterised in that the input of the input of the voltage comparator and the A/D converter is connected to
The partial pressure output end.
2. Electromagnetic Heating zero passage detection as claimed in claim 1 and voltage sampling circuit, it is characterised in that the A/D turns
Parallel operation is integrated in the MCU.
3. Electromagnetic Heating zero passage detection as claimed in claim 1 or 2 and voltage sampling circuit, it is characterised in that the electricity
Pressure comparator is integrated in the MCU.
4. Electromagnetic Heating zero passage detection as claimed in claim 1 and voltage sampling circuit, it is characterised in that the A/D turns
Connection line between parallel operation and the partial pressure output end is provided with gate-controlled switch.
5. Electromagnetic Heating zero passage detection as claimed in claim 4 and voltage sampling circuit, it is characterised in that the A/D turns
One of parallel operation and in-phase input end or inverting input of the voltage comparator are connected, the in-phase input end and anti-
Another in phase input is connected with D/A converter.
6. Electromagnetic Heating zero passage detection as claimed in claim 1 and voltage sampling circuit, it is characterised in that the voltage ratio
Same I/O interfaces are used compared with device and the A/D converter.
7. Electromagnetic Heating zero passage detection as claimed in claim 1 and voltage sampling circuit, it is characterised in that the voltage ratio
Two separate I/O interfaces are used compared with device and the A/D converter.
8. Electromagnetic Heating zero passage detection as claimed in claim 1 and voltage sampling circuit, it is characterised in that the filtered electrical
It is patch capacitor to hold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621007045.2U CN206223856U (en) | 2016-08-31 | 2016-08-31 | Electromagnetic Heating zero passage detection and voltage sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621007045.2U CN206223856U (en) | 2016-08-31 | 2016-08-31 | Electromagnetic Heating zero passage detection and voltage sampling circuit |
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| Publication Number | Publication Date |
|---|---|
| CN206223856U true CN206223856U (en) | 2017-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201621007045.2U Active CN206223856U (en) | 2016-08-31 | 2016-08-31 | Electromagnetic Heating zero passage detection and voltage sampling circuit |
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| Country | Link |
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| CN (1) | CN206223856U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114205941A (en) * | 2020-09-18 | 2022-03-18 | 杭州九阳小家电有限公司 | Electromagnetic heating control circuit and method |
-
2016
- 2016-08-31 CN CN201621007045.2U patent/CN206223856U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114205941A (en) * | 2020-09-18 | 2022-03-18 | 杭州九阳小家电有限公司 | Electromagnetic heating control circuit and method |
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