CN107148102A - A kind of household microwave oven variable-frequency power sources control system - Google Patents
A kind of household microwave oven variable-frequency power sources control system Download PDFInfo
- Publication number
- CN107148102A CN107148102A CN201710548990.6A CN201710548990A CN107148102A CN 107148102 A CN107148102 A CN 107148102A CN 201710548990 A CN201710548990 A CN 201710548990A CN 107148102 A CN107148102 A CN 107148102A
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- Prior art keywords
- resistance
- chip
- frequency converter
- pin
- microwave oven
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
Abstract
The invention discloses a kind of household microwave oven variable-frequency power sources control system, including rectifier, frequency converter, drive circuit, current detection circuit, voltage detecting circuit, signal processing module, I/O circuits and protection circuit, the input of the rectifier is connected with alternating current, the output end connection frequency converter of rectifier, the output end connection micro-wave oven of frequency converter, frequency converter is also driven the drive signal control of circuit, household microwave oven variable-frequency power sources control system of the present invention gathers the voltage and current signal of frequency converter by voltage detecting and current detecting respectively, and signal is changed and handled by single-chip microcomputer, realized again by drive circuit and frequency converter and the frequency conversion of microwave oven internal magnetron is controlled, heated food is set to obtain Omnibearing even heating, so the food mouthfeel that cooking comes out is more preferable, and nutrition leak is few.Power consumption when converter technique is by improving the efficiency of power unit and reducing standby.
Description
Technical field
The present invention relates to a kind of variable-frequency power sources, specifically a kind of household microwave oven variable-frequency power sources control system.
Background technology
Micro-wave oven, as its name suggests, is cooked with microwave to cook.Micro-wave oven is a kind of showing for use microwave heating of food
Generationization cooks kitchen range.Microwave is a kind of electromagnetic wave.Micro-wave oven is made up of power supply, magnetron, control circuit and cooking cavity etc. part.
Power supply provides about 4000 volts of high pressures to magnetron, and magnetron continuously generates microwave under power supply excitation, then by waveguide system
System, is coupled in cooking cavity.Near at the import of cooking cavity, there is a rotatable agitator, because agitator is fan
The metal of shape, the reflection to microwave after rotating with all directions, so microwave energy can be evenly distributed in
In cooking cavity, so as to heat food.
Existing micro-wave oven is controlled using common power mostly, and its electric voltage frequency is fixed, can only be by between the time of ON/OFF
Control is simulated every length, the somewhere of heated food so occurs by Repeat-heating, and another place is underheated not
Uniform phenomenon, is needed to be improved.
The content of the invention
It is an object of the invention to provide a kind of household microwave oven variable-frequency power sources control system, to solve above-mentioned background technology
The problem of middle proposition.
To achieve the above object, the present invention provides following technical scheme：
A kind of household microwave oven variable-frequency power sources control system, including rectifier, frequency converter, drive circuit, current detecting electricity
Road, voltage detecting circuit, signal processing module, I/O circuits and protection circuit, the input of the rectifier are electrically connected with exchanging
Connect, the output end connection frequency converter of rectifier, the output end connection micro-wave oven of frequency converter, frequency converter is also driven the drive of circuit
Current detection module and voltage detection module, current detection module and electricity are provided with the middle of dynamic signal control, frequency converter and micro-wave oven
Pressure detection module gathers electric current and voltage signal and is transferred to signal processing module respectively, and signal processing module is also respectively connected with drive
Dynamic circuit, I/O circuits and protection circuit.
It is used as the preferred scheme of the present invention：The voltage detection module includes Transformer Winding N1, diode D1, electric capacity C3
With resistance R9, one end of the Transformer Winding N1 is grounded, and other end connection diode D1 anode, diode D1 negative electrode connects
Connect electric capacity C3, electric capacity C4 and chip U1 pin 8, the chip U1 connection chip of pin 6 U1 pin 7, the electric capacity C3 other end
With the electric capacity C4 other end, chip U1 pin 1 connects electric capacity C2 and chip U1 pin 1, the chip U1 connection electric capacity of pin 2
Connect and become after C1 and resistance R4, resistance R4 other end connection resistance R3, resistance R1 and resistance R5, resistance R3 and resistance R2 series connection
The pin 7 of the other end connection frequency converter test point N, chip U2 after frequency device test point P, resistance R1 and resistance R5 are in parallel connect electricity
Hinder R6, resistance R6 other end connection resistance R8, electric capacity C6 and chip U3 pin 3, the chip U2 resistance R7 of pin 6, resistance
It is grounded after R8 and electric capacity C6 is in parallel, the resistance R7 other end connection connection chip U3 pin 2, electric capacity C7 and resistance R9, chip
U3 pin 1 connects a fixing end of the electric capacity C7 other end, the resistance R9 other end and potentiometer RP1, potentiometer RP1's
Another fixing end is grounded after being connected with resistance R10, potentiometer RP1 sliding end connection signal output part VPN.
It is used as the preferred scheme of the present invention：The model 78L05C of the chip U1.
It is used as the preferred scheme of the present invention：The model A7840 of the chip U2.
It is used as the preferred scheme of the present invention：The model LF353 of the chip U3.
It is used as the preferred scheme of the present invention：The Transformer Winding N1 is the secondary end winding of AC transformer.
It is used as the preferred scheme of the present invention：The rectification module is full bridge rectifier, its model ASEMI.
It is used as the preferred scheme of the present invention：The current detection module uses current transformer.
It is used as the preferred scheme of the present invention：The signal processing module is single-chip microcomputer.
Compared with prior art, the beneficial effects of the invention are as follows：Household microwave oven variable-frequency power sources control system of the present invention is led to
Zenith tracking and current detecting gather the voltage and current signal of frequency converter respectively, and by single-chip microcomputer signal is carried out conversion and
Processing, then the frequency conversion control to microwave oven internal magnetron is realized by drive circuit and frequency converter, make to be heated food
Product obtain Omnibearing even heating, so the food mouthfeel that cooking comes out is more preferably, and nutrition leak is few.Converter technique is by improving
The efficiency of power unit and power consumption when reducing standby.
Brief description of the drawings
Fig. 1 is the circuit diagram of household microwave oven variable-frequency power sources control system；
Fig. 2 is the circuit diagram of voltage detection module.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Refer in Fig. 1-2, the embodiment of the present invention, a kind of household microwave oven variable-frequency power sources control system, including rectifier,
Frequency converter, drive circuit, current detection circuit, voltage detecting circuit, signal processing module, I/O circuits and protection circuit, it is described
The input of rectifier is connected with alternating current, the output end connection frequency converter of rectifier, the output end connection microwave of frequency converter
Stove, frequency converter is also driven in the middle of the drive signal control of circuit, frequency converter and micro-wave oven and is provided with current detection module and electricity
Detection module is pressed, current detection module and voltage detection module gather electric current and voltage signal and be transferred to signal transacting mould respectively
Block, signal processing module is also respectively connected with drive circuit, I/O circuits and protection circuit.
Voltage detection module includes Transformer Winding N1, diode D1, electric capacity C3 and resistance R9, the Transformer Winding N1
One end ground connection, other end connection diode D1 anode, diode D1 negative electrode connection electric capacity C3, electric capacity C4 and chip U1's
Pin 8, chip U1 pin 6 connects the other end of chip U1 pin 7, the electric capacity C3 other end and electric capacity C4, chip U1's
Pin 1 connects electric capacity C2 and chip U1 pin 1, the chip U1 connection electric capacity C1 and resistance R4 of pin 2, the resistance R4 other end
Connect connection frequency converter test point P, resistance R1 and resistance after resistance R3, resistance R1 and resistance R5, resistance R3 and resistance R2 series connection
The connection of pin 7 the resistance R6, resistance R6 of the other end connection frequency converter test point N, chip U2 after R5 is in parallel other end connection
Resistance R8, electric capacity C6 and chip U3 pin 3, are grounded, electricity after chip U2 pin 6 resistance R7, resistance R8 and electric capacity C6 are in parallel
R7 other end connection connection chip U3 pin 2, electric capacity C7 and resistance R9 is hindered, the chip U3 connection electric capacity of pin 1 C7's is another
One fixing end of one end, the resistance R9 other end and potentiometer RP1, potentiometer RP1 another fixing end and resistance R10 go here and there
It is grounded after connection, potentiometer RP1 sliding end connection signal output part VPN.
Chip U1 model 78L05C.Chip U2 model A7840.Chip U3 model LF353.Transformer around
Group N1 is the secondary end winding of AC transformer.Rectification module is full bridge rectifier, its model ASEMI.Current detecting mould
Block uses current transformer.Signal processing module is single-chip microcomputer.
The present invention operation principle be：Signal processing circuit is with the output voltage of frequency converter, the signal of current detection circuit
And the input letter that non electrical quantity (circuit conversion is electric signal after testing for speed, torque etc.) signal of frequency converter external loading is circuit
Number, and the electric current, the voltage signal that are given with signal processing circuit are compared computing, its difference is believed as the input of drive circuit
Number, control preferably single-chip microcomputer in output voltage, the frequency of inverter, the design to be used as Signal Processing Element.
The function of drive circuit is that under the control of control circuit, producing the drive signal of enough power makes inverter main circuit
Switch device conductive or shut-off, drive circuit are that the control to drive circuit is realized using electric isolution technology.The driving of frequency converter
Circuit typically has following several ways.
1st, the drive circuit of discrete pins type element composition：The drive circuit of discrete pins type element composition is in 20th century 80
It is widely used on the frequency converter that the Japan in age and Taiwan are produced, the main Fuji (G2, G5) for including Japan, three agree
A series of frequency conversions such as (SVS, SVF, MF), springtime, the Ou Lin of Mitsubishi Z series K series and TaiWan, China, general biography, Delta, platform peace
Device.With the development and the appearance of paster technique of large scale integrated circuit, because this kind of drive circuit designs complicated, integration degree
It is low to be gradually eliminated.
2nd, optocoupler drive circuit：A kind of driving electricity that optocoupler drive circuit is widely adopted when being modern Design of Inverter
Road, because circuit is simple, reliability is high, and switch performance is good, therefore is used by American-European and Japan Duo Jia frequency converters manufacturer.By
It is many in the model of driving optocoupler, so the leeway selected is also very big.Optocoupler is driven to select the more main TLP systems by Toshiba
Row, PC series, the HCPL series of Hewlett-Packard of Sharp etc..By taking the serial optocouplers of Toshiba TLP as an example, driving IGBT module is mainly used
It is the driving optocoupler of two models of TLP250, TLP251.Module for low current (15A) left and right typically uses TLP251, outside
Enclose and be aided with driving power supply and current-limiting resistance etc. again and just constitute simplest drive circuit.And for medium current (50A) left and right
Module typically use TLP250 models optocoupler.For the module of more high current, typically taken in design driven circuit
One-level amplifying circuit is further added by behind optocoupler driving, the purpose of safety driving IGBT module is reached.
3rd, thick film drive circuit：Thick film drive circuit grows up on the basis of Resistor-Capacitor Unit and semiconductor technology
A kind of hydrid integrated circuit.It is to utilize thick film technology making pattern element and connecting wire on a ceramic substrate, will driving electricity
Each element on road is integrated on one piece of ceramic substrate, makes a global facility.Using thick film drive circuit for wiring
Design brings very big convenience, the reliability of complete machine and the uniformity of batch production is improved, while also strengthening technology
Confidentiality.Present thick film drive circuit is often integrated with many protection circuits and detection circuit, technology content also more and more higher.
4th, special integrated package drive circuit：Present special integrated package drive circuit, mainly have IR IR2111,
IR2112, IR2113 etc., in addition also the EXB series of Mitsubishi, M57956, M57959 of Mitsubishi etc..
The function of I/O circuits is that frequency converter has a variety of input signals in order that man-machine interaction is better achieved in frequency converter
(such as operation, the operation of multistage speed), output (such as electric current, frequency, protection act driving) letter of also various inner parameters
Number and fault alarm output signal etc..
The circuit of voltage detection module is as shown in Figure 2：U2 is linear optocoupler in circuit, and its input side is powered by switching
The alternating voltage that the independent winding N1 of transformer is provided, is obtained through diode D1 rectifying and wave-filterings, by 78L05 voltage stabilizing chip U1 processing
5V power supplys are provided, power supply ground terminal and the same current potential of main circuit N-terminal.Outlet side is powered, then is provided by mainboard+5V.
DC loop P, N-terminal connect the voltage output end of frequency converter, and its voltage is direct through partial pressure, acquirement about certain numerical value
Voltage division signal, input photo-coupler U2 is carried out after light, electric isolution and Linear Amplifer, the detection voltage being amplified in output end
Signal, then further amplified by LF353 subtracting amplifiers, VPN DC voltages detection signal is formed, through output interface VPN connections
Different equipment are connected to single-chip microcomputer, or according to specific implementation situation.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as to the claim involved by limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It may be appreciated other embodiment.
Claims (9)
1. a kind of household microwave oven variable-frequency power sources control system, including rectifier, frequency converter, drive circuit, current detection circuit,
Voltage detecting circuit, signal processing module, I/O circuits and protection circuit, it is characterised in that the input of the rectifier and friendship
Stream, which is electrically connected, to be connect, and the output end connection frequency converter of rectifier, the output end connection micro-wave oven of frequency converter, frequency converter is also driven
Current detection module and voltage detection module, current detecting are provided with the middle of the drive signal control of circuit, frequency converter and micro-wave oven
Module and voltage detection module gather electric current and voltage signal and are transferred to signal processing module respectively, and signal processing module also divides
Lian Jie not drive circuit, I/O circuits and protection circuit.
2. household microwave oven variable-frequency power sources control system according to claim 1, it is characterised in that the voltage detecting mould
Block includes Transformer Winding N1, diode D1, electric capacity C3 and resistance R9, the Transformer Winding N1 one end ground connection, the other end
Diode D1 anode is connected, diode D1 negative electrode connects electric capacity C3, electric capacity C4 and chip U1 pin 8, and chip U1's draws
The other end of the connection of pin 6 chip U1 pin 7, the electric capacity C3 other end and electric capacity C4, the chip U1 connection electric capacity C2 of pin 1 and
Chip U1 pin 1, chip the U1 connection of pin 2 electric capacity C1 and resistance R4, resistance R4 other end connection resistance R3, resistance R1
The other end after connection frequency converter test point P, resistance R1 and resistance R5 are in parallel after being connected with resistance R5, resistance R3 and resistance R2 connects
Connect frequency converter test point N, chip the U2 connection of pin 7 resistance R6, resistance R6 other end connection resistance R8, electric capacity C6 and chip
U3 pin 3, is grounded after chip U2 pin 6 resistance R7, resistance R8 and electric capacity C6 are in parallel, resistance R7 other end connection connection
Chip U3 pin 2, electric capacity C7 and resistance R9, chip the U3 connection of the pin 1 electric capacity C7 other end, the resistance R9 other end and
A potentiometer RP1 fixing end, potentiometer RP1 another fixing end is grounded after being connected with resistance R10, potentiometer RP1's
Sliding end connection signal output part VPN.
3. household microwave oven variable-frequency power sources control system according to claim 2, it is characterised in that the type of the chip U1
Number be 78L05C.
4. household microwave oven variable-frequency power sources control system according to claim 2, it is characterised in that the type of the chip U2
Number be A7840.
5. household microwave oven variable-frequency power sources control system according to claim 2, it is characterised in that the type of the chip U3
Number be LF353.
6. household microwave oven variable-frequency power sources control system according to claim 2, it is characterised in that the Transformer Winding
N1 is the secondary end winding of AC transformer.
7. household microwave oven variable-frequency power sources control system according to claim 1, it is characterised in that the rectifier is complete
Bridge rectification circuit, its model ASEMI.
8. household microwave oven variable-frequency power sources control system according to claim 1, it is characterised in that the current detecting mould
Block uses current transformer.
9. household microwave oven variable-frequency power sources control system according to claim 1, it is characterised in that the signal transacting mould
Block is single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710548990.6A CN107148102A (en) | 2017-07-07 | 2017-07-07 | A kind of household microwave oven variable-frequency power sources control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710548990.6A CN107148102A (en) | 2017-07-07 | 2017-07-07 | A kind of household microwave oven variable-frequency power sources control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107148102A true CN107148102A (en) | 2017-09-08 |
Family
ID=59785193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710548990.6A Withdrawn CN107148102A (en) | 2017-07-07 | 2017-07-07 | A kind of household microwave oven variable-frequency power sources control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107148102A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107842909A (en) * | 2017-10-13 | 2018-03-27 | 滕州富源低热值燃料热电有限公司 | A kind of system for expanding cogeneration of heat and power central heating scale |
| CN108969181A (en) * | 2018-07-19 | 2018-12-11 | 广州途悠悠健康科技有限公司 | A kind of human body heating physiotherapy equipment circuit structure |
-
2017
- 2017-07-07 CN CN201710548990.6A patent/CN107148102A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107842909A (en) * | 2017-10-13 | 2018-03-27 | 滕州富源低热值燃料热电有限公司 | A kind of system for expanding cogeneration of heat and power central heating scale |
| CN108969181A (en) * | 2018-07-19 | 2018-12-11 | 广州途悠悠健康科技有限公司 | A kind of human body heating physiotherapy equipment circuit structure |
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Application publication date: 20170908 |