CN208241932U - A kind of inverter circuit applied to automatic vending machine microwave heating system - Google Patents
A kind of inverter circuit applied to automatic vending machine microwave heating system Download PDFInfo
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- CN208241932U CN208241932U CN201820671911.0U CN201820671911U CN208241932U CN 208241932 U CN208241932 U CN 208241932U CN 201820671911 U CN201820671911 U CN 201820671911U CN 208241932 U CN208241932 U CN 208241932U
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Abstract
The utility model discloses a kind of inverter circuits applied to automatic vending machine microwave heating system, it is arranged between battery pack and magnetron, it include: MCU and the high voltage supply control unit being connected respectively with MCU and filament supply control unit, the battery pack is connected by high voltage supply control unit with magnetron, the high voltage supply control unit is used to the direct inversion of cell voltage be magnetron operating voltage, and the filament supply control unit is connected with battery pack, the filament being arranged in magnetron respectively.The design directly lies prostrate operating voltage for more than the 4000 of cell voltage inversion to magnetron, reduce the process of intermediate secondary transformation, it is not only high-efficient, and same battery capacity can work longer, it is very energy saving, also by filament supply control unit to the filament pre-heating in magnetron, period accounting inefficient in heating process is reduced, increases the service life of filament.
Description
Technical field
The utility model relates to field of microwave heating, are specifically related to a kind of applied to automatic vending machine microwave heating system
Inverter circuit.
Background technique
Current automatic vending machines some on the market are in order to provide built in hot drink warm-served food microwave heating to customer whenever and wherever possible
System is heated to food, but if multiple powerful microwave heating equipments are run simultaneously must need very powerful electricity
Source is mounted with battery pack in the automatic vending machine of part, and backup power source can be provided when alternating current underpower and gives microwave heating dress
Power supply is set, the voltage of general battery is 12V, and more than 4,000 volt high pressures are needed when microwave heating equipment is run.
When being powered as backup power source to microwave heating system by battery pack, conventional mode is first by battery pack
Cell voltage inversion is the working power of 220V, then 220V working power inversion is lied prostrate high pressures for more than 4,000 by Industrial Frequency Transformer,
Low efficiency, it is not energy saving enough；And traditional heating process be by magnetron filament and magnetron power together, filament does not have
Pre- heat function, inefficient period accounting is big in entire heating process.
Utility model content
To solve the above-mentioned problems, the purpose of the utility model is to provide a kind of by the direct inversion of cell voltage to more than 4,000
High pressure is lied prostrate, heating efficiency is high, also with the inverter circuit applied to automatic vending machine microwave heating system of filament pre-heating function.
The technical solution adopted in the utility model is:
A kind of inverter circuit applied to automatic vending machine microwave heating system is arranged between battery pack and magnetron,
It include: that MCU and the high voltage supply control unit being connected respectively with MCU and filament supply control unit, the battery pack pass through
High voltage supply control unit is connected with magnetron, and the high voltage supply control unit is used to the direct inversion of cell voltage be magnetic control
Pipe operating voltage, the filament supply control unit are connected with battery pack, the filament being arranged in magnetron respectively.
Further, the high voltage supply control unit includes metal-oxide-semiconductor Q8, metal-oxide-semiconductor Q9, the first metal-oxide-semiconductor driving circuit,
Two metal-oxide-semiconductor driving circuits, transformer T1, several capacitors, several resistance and several diodes；
The PMW1 output end of the MCU is connected by the first metal-oxide-semiconductor driving circuit with the grid G of metal-oxide-semiconductor Q8, the MOS
The drain D of pipe Q8 is connected with low-voltage side coil one end of transformer T1, and the source S ground connection of metal-oxide-semiconductor Q8, the transformer T1's is low
Pressure side feeder ear is connected for powering with battery pack；
The PMW2 output end of the MCU is connected by the second metal-oxide-semiconductor driving circuit with the grid G of metal-oxide-semiconductor Q9, the MOS
The drain D of pipe Q9 is connected with the low-voltage side coil other end of transformer T1, the source S ground connection of metal-oxide-semiconductor Q8, the source S of metal-oxide-semiconductor Q8
It is connected by capacitor C5 with low-pressure side feeder ear；
The high pressure lateral coil of the transformer T1 is connected by current rectifying and wave filtering circuit with magnetron, the current rectifying and wave filtering circuit
It is all grounded by current sampling circuit with the AD1 input terminal of MCU, with the operating current for MCU detection magnetron；The rectification
Filter circuit is connected by bleeder circuit with the AD2 input terminal of MCU with the common end of magnetron, to detect magnetron for MCU
Operating voltage.
Further, the first metal-oxide-semiconductor driving circuit includes triode Q1, triode Q2, triode Q6, three pole
The base stage of pipe Q1 is connected by resistance R1 with the PMW1 output end of MCU, the emitter ground connection of triode Q1, the current collection of triode Q1
Pole is connected with the base stage of the base stage of triode Q2, triode Q6 respectively, the current collection of the emitter of the triode Q2, triode Q6
Pole is all connected with the grid G of metal-oxide-semiconductor Q8, and the collector of triode Q2 is connected with low-voltage supply, the emitter of triode Q6
The collector of ground connection, triode Q1 is connected by resistance R2 with the collector of triode Q2.
Further, the second metal-oxide-semiconductor driving circuit includes triode Q3, triode Q5, triode Q7, three pole
The base stage of pipe Q3 is connected by resistance R4 with the PMW2 output end of MCU, the emitter ground connection of triode Q3, the current collection of triode Q3
Pole is connected with the base stage of the base stage of triode Q5, triode Q6 respectively, the current collection of the emitter of the triode Q5, triode Q7
Pole is all connected with the grid G of metal-oxide-semiconductor Q9, and the collector of triode Q5 is connected with low-voltage supply, the emitter of triode Q7
The collector of ground connection, triode Q3 is connected by resistance R6 with the collector of triode Q5.
Further, the current rectifying and wave filtering circuit includes diode D2, diode D3, diode D5, diode D6, capacitor
C6 and capacitor C7, the current sampling circuit include resistance R17, diode D7 and resistance R19, and the bleeder circuit includes resistance
R21, resistance R22, capacitor C8 and zener diode D12；
High pressure lateral coil one end of the transformer T1 is connected with the anode of the cathode of diode D2, diode D3 respectively,
The cathode of the diode D3 is connected with the power end of magnetron, the other end of high pressure lateral coil respectively with diode D5 just
Pole, the cathode of diode D6 are connected, and the cathode of the diode D5 is connected with the power end of magnetron, and the diode D6 is just
Pole is connected with the anode of diode D2, and the cathode of diode D5 is connected by capacitor C6 with the anode of diode D6, diode D2
It is connected by resistance R19 with the AD1 input terminal of MCU (1) with the common end of diode D6, diode D2 is public with diode D6's
End is grounded by resistance R17, the capacitor C7 and diode D7 being connected in parallel to each other；The common end of diode D3 and diode D5 pass through electricity
Resistance R21 is connected with the AD2 input terminal of MCU, the AD2 input terminal of MCU by the zener diode D12 that is connected in parallel to each other, resistance R22,
Capacitor C8 ground connection.
Further, the filament supply control unit includes triode Q4, transformer T2, photoelectrical coupler U1, photoelectricity
Coupler U2, a reference source IC1, several resistance, several capacitors and several diodes；
The PMW3 output end of the MCU is connected with the base stage of triode Q4, the emitter ground connection of the triode Q4, three poles
The collector of pipe Q4 and first siding ring one end of transformer T2, the first siding ring other end of the transformer T2 pass through resistance
R7 is connected so that for powering, the first siding ring other end of transformer T2 passes through the resistance R8, the capacitor that are sequentially connected in series with battery pack
C2 is connected with the collector of triode Q4；
Second siding ring one end of the transformer T2 passes through one end of the diode D8, inductance L1 and filament that are sequentially connected in series
It is connected, the second siding ring other end of transformer T2 passes through the diode D9, diode D10, diode D11 and the lamp that are sequentially connected in series
The other end of silk is connected, and the common end of inductance L1 and diode D8 pass through the secondary side line of polarized capacitor CE1 and transformer T2
The other end is enclosed to be connected, the common end of inductance L1 and filament pass through the polarized capacitor CE2, capacitor C9, resistance R13 that are connected in parallel to each other with
The second siding ring other end of transformer T2 is connected；
The first output end of the photoelectrical coupler U1 is connected with the AD3 input terminal of MCU, and the second of photoelectrical coupler U1 is defeated
Outlet ground connection, the first output end of the photoelectrical coupler U2 are connected with the AD4 input terminal of MCU, and the second of photoelectrical coupler U2
First output end of output end ground connection, photoelectrical coupler U1 is connected by resistance R11 with the end VCC of low-voltage supply, photoelectricity
The first output end of coupler U2 is connected by resistance R12 with the end VCC of low-voltage supply；The first of photoelectrical coupler U1 is defeated
Enter end to be connected by resistance R15, the resistance R20 being sequentially connected in series with the common end of filament and diode D11, photoelectrical coupler U1's
Second input terminal is connected by resistance R14 with the common end of filament and diode D11, the second input terminal of photoelectrical coupler U1 and
Resistance R13 is connected with the common end of diode D9, the second input terminal of photoelectrical coupler U1 by capacitor C10 and resistance R15 and
The common end of resistance R20 is connected；
The first input end of the photoelectrical coupler U2 is connected by resistance R23 with the pin 1 of a reference source IC1, photoelectricity coupling
The second input terminal of clutch U2 is connected by resistance R16 with the pin 3 of a reference source IC1, the pin 2 and lamp of a reference source IC1
Silk is connected with the common end of diode D11, is in series with capacitor C11, a reference source IC1 between the pin 3 and pin 1 of a reference source IC1
Pin 2 and pin 1 between be in series with resistance R18.
The utility model has the beneficial effects that
Battery pack is powered by high voltage supply control unit to magnetron in the design, directly by cell voltage inversion to magnetic
It lies prostrate operating voltage more keyholed back plate the 4,000, reduces the process of intermediate secondary transformation, compare and traditional be from battery inversion
220V50HZ, then the voltage that magnetron can work is boosted to from 220V50HZ by Industrial Frequency Transformer, it is not only high-efficient, but also
Same battery capacity can work longer, very energy saving.
Additionally needed to the filament pre-heating in magnetron when automatic vending machine starts to sell by filament supply control unit
When heating, MCU is controlled filament and first normally generated heat by filament supply control unit reaches the state of launching electronics, then passes through
MCU controls the burning voltage that high voltage supply control unit makes magnetron reach normal work, while MCU passes through high voltage supply and controls
Unit detects the operating current of magnetron, and when electric current is stablized in magnetron normal range of operation, MCU is by filament for automatically controlled
Unit processed reduces the operating current of filament.Enter steady-working state by magnetron to reach prestissimo, reduces and add
Inefficient period accounting in thermal process increases the service life of filament.
Detailed description of the invention
Specific embodiment of the present utility model is described further with reference to the accompanying drawing:
Fig. 1 is the functional block diagram of the utility model inverter circuit；
Fig. 2 is the circuit diagram of the utility model high voltage supply control unit；
Fig. 3 is the circuit diagram of the utility model filament supply control unit.
Specific embodiment
It is as shown in Figure 1 the MCU1 of the utility model and the high voltage supply control unit 2 and lamp that are connected respectively with MCU1
Silk supply control unit 3, the battery pack end are connected by high voltage supply control unit 2 with magnetron, the high voltage supply control
Unit 2 processed be used for by the direct inversion of cell voltage be magnetron operating voltage, the filament supply control unit 3 respectively with battery
Group, the filament being arranged in magnetron are connected.
As shown in Fig. 2, high voltage supply control unit 2 includes metal-oxide-semiconductor Q8, metal-oxide-semiconductor Q9, the first metal-oxide-semiconductor driving circuit, second
Metal-oxide-semiconductor driving circuit, transformer T1, several capacitors, several resistance and several diodes；
Wherein, the PMW1 output end of MCU1 is connected by the first metal-oxide-semiconductor driving circuit with the grid G of metal-oxide-semiconductor Q8, metal-oxide-semiconductor
The drain D of Q8 is connected with low-voltage side coil one end of transformer T1, and the source S ground connection of metal-oxide-semiconductor Q8, the low-pressure side of transformer T1 supplies
Electric end is connected to be used to power with the end V-IN of battery pack,；
Wherein, the PMW2 output end of MCU1 is connected by the second metal-oxide-semiconductor driving circuit with the grid G of metal-oxide-semiconductor Q9, metal-oxide-semiconductor
The drain D of Q9 is connected with the low-voltage side coil other end of transformer T1, the source S ground connection of metal-oxide-semiconductor Q8, and the source S of metal-oxide-semiconductor Q8 is logical
Capacitor C5 is crossed to be connected with low-pressure side feeder ear；
Wherein, the high pressure lateral coil of transformer T1 is connected by current rectifying and wave filtering circuit with magnetron, the rectifying and wave-filtering electricity
The AD1 input terminal of road and MCU1 are all grounded by current sampling circuit, with the operating current for MCU1 detection magnetron；It is described
Current rectifying and wave filtering circuit is connected by bleeder circuit with the AD2 input terminal of MCU1 with the common end of magnetron, to detect for MCU1
The operating voltage of magnetron.
Preferably, the first metal-oxide-semiconductor driving circuit includes triode Q1, triode Q2, triode Q6, the base stage of triode Q1
Be connected by resistance R1 with the PMW1 output end of MCU1, the emitter of triode Q1 ground connection, the collector of triode Q1 respectively with
The base stage of triode Q2, the base stage of triode Q6 are connected, the emitter of triode Q2, triode Q6 collector all with metal-oxide-semiconductor
The grid G of Q8 is connected, and the collector of triode Q2 is connected with low-voltage supply, the emitter ground connection of triode Q6, triode
The collector of Q1 is connected by resistance R2 with the collector of triode Q2.
Preferably, the second metal-oxide-semiconductor driving circuit includes triode Q3, triode Q5, triode Q7, the base stage of triode Q3
Be connected by resistance R4 with the PMW2 output end of MCU1, the emitter of triode Q3 ground connection, the collector of triode Q3 respectively with
The base stage of triode Q5, the base stage of triode Q6 are connected, the emitter of triode Q5, triode Q7 collector all with metal-oxide-semiconductor
The grid G of Q9 is connected, and the collector of triode Q5 is connected with low-voltage supply, the emitter ground connection of triode Q7, triode
The collector of Q3 is connected by resistance R6 with the collector of triode Q5.
Preferably, current rectifying and wave filtering circuit includes diode D2, diode D3, diode D5, diode D6, capacitor C6 and electricity
Hold C7, the current sampling circuit includes resistance R17, diode D7 and resistance R19, and the bleeder circuit includes resistance R21, electricity
Hinder R22, capacitor C8 and zener diode D12；
High pressure lateral coil one end of the transformer T1 is connected with the anode of the cathode of diode D2, diode D3 respectively,
The cathode of the diode D3 is connected with the power end of magnetron, the other end of high pressure lateral coil respectively with diode D5 just
Pole, the cathode of diode D6 are connected, and the cathode of the diode D5 is connected with the power end of magnetron, and the diode D6 is just
Pole is connected with the anode of diode D2, and the cathode of diode D5 is connected by capacitor C6 with the anode of diode D6, diode D2
It is connected by resistance R19 with the AD1 input terminal of MCU1 with the common end of diode D6, the common end of diode D2 and diode D6
Pass through resistance R17, capacitor C7 and diode the D7 ground connection being connected in parallel to each other；The common end of diode D3 and diode D5 pass through resistance
R21 is connected with the AD2 input terminal of MCU1, the AD2 input terminal of MCU1 pass through the zener diode D12 being connected in parallel to each other, resistance R22,
Capacitor C8 ground connection.
Certainly, the above first/second metal-oxide-semiconductor driving circuit, current rectifying and wave filtering circuit, current sampling circuit and bleeder circuit be only
It is only a preferred embodiment of the utility model, can be realized the similar circuit that the component of corresponding function is combined into and also belong to
The protection scope of the utility model.
As shown in figure 3, filament supply control unit 3 includes triode Q4, transformer T2, photoelectrical coupler U1, photoelectricity coupling
Clutch U2, a reference source IC1, several resistance, several capacitors and several diodes；
Wherein, the PMW3 output end of MCU1 is connected with the base stage of triode Q4, the emitter ground connection of triode Q4, triode
The first siding ring other end of the collector of Q4 and first siding ring one end of transformer T2, transformer T2 passes through resistance R7 and electricity
The end V-IN of pond group is connected so that for powering, the first siding ring other end of transformer T2 passes through the resistance R8, the electricity that are sequentially connected in series
Hold C2 to be connected with the collector of triode Q4；
Wherein, second siding ring one end of transformer T2 passes through the one of the diode D8, inductance L1 and the filament that are sequentially connected in series
End is connected, the second siding ring other end of transformer T2 pass through the diode D9, diode D10, diode D11 that are sequentially connected in series with
The other end of filament is connected, the common end of inductance L1 and diode D8 pass through the secondary side of polarized capacitor CE1 and transformer T2
The coil other end is connected, and the common end of inductance L1 and filament passes through the polarized capacitor CE2, capacitor C9, the resistance R13 that are connected in parallel to each other
It is connected with the second siding ring other end of transformer T2；
Wherein, the first output end of photoelectrical coupler U1 is connected with the AD3 input terminal of MCU1, and the second of photoelectrical coupler U1
Output end ground connection, the first output end of photoelectrical coupler U2 are connected with the AD4 input terminal of MCU1, and the second of photoelectrical coupler U2 is defeated
First output end of outlet ground connection, photoelectrical coupler U1 is connected by resistance R11 with the end VCC of low-voltage supply, photoelectricity coupling
The first output end of clutch U2 is connected by resistance R12 with the end VCC of low-voltage supply；The first input of photoelectrical coupler U1
End is connected by the resistance R15, the resistance R20 that are sequentially connected in series with the common end of filament and diode D11, and the of photoelectrical coupler U1
Two input terminals are connected by resistance R14 with the common end of filament and diode D11, the second input terminal and electricity of photoelectrical coupler U1
Resistance R13 is connected with the common end of diode D9, and the second input terminal of photoelectrical coupler U1 passes through capacitor C10 and resistance R15 and electricity
The common end for hindering R20 is connected；
Wherein, the first input end of photoelectrical coupler U2 is connected by resistance R23 with the pin 1 of a reference source IC1, photoelectricity coupling
The second input terminal of clutch U2 is connected by resistance R16 with the pin 3 of a reference source IC1, the pin 2 of a reference source IC1 and filament and
The common end of diode D11 is connected, and is in series with capacitor C11 between the pin 3 and pin 1 of a reference source IC1, a reference source IC1's draws
Resistance R18 is in series between foot 2 and pin 1.
Certainly, the above filament power-supplying circuit is only a preferred embodiment of the utility model, can be realized phase
The similar circuit for answering the component of function to be combined into also belongs to the protection scope of the utility model.
In the design, as shown in Fig. 2, pulse width of the MCU1 by control two output ends of MCU-PWM1, MCU-PWM2
Control the output voltage of high voltage supply control unit, Q1, Q2, Q6, Q3, Q5, Q7 form two groups of metal-oxide-semiconductor driving circuits, allows MOS
Tube grid voltage is more precipitous, and working efficiency is higher.
MCU-PWM1 is responsible for positive half cycle, MCU-PWM2 is responsible for negative half period, passes through the circle of the high-pressure side transformer T1 and low-pressure side
Number than achieving the purpose that boosting, low-pressure side be connected with the end V-IN of battery pack with pass through for powering, after boosting D2, D3, D5,
D6 rectification supplies the power end V-OUT of magnetron after C7 filtering.The on high-tension side voltage of transformer T1 by partial pressure after from
MCU-AD2 gives MCU1, and MCU1 adjusts transformer T1 high by the pulse width of software control MCU1-PWM1, MCU1-PWM2
The voltage of side is pressed, to reach the normal range (NR) of magnetron work.
The on high-tension side electric current of transformer T1 becomes voltage by R17 sampling and gives MCU1 by MCU-AD1, when MCU1 is detected
When reaching setting target to electric current, controlling filament voltage by filament supply control unit 3 is reduced.
As shown in figure 3, MCU1-PWM3, for controlling filament voltage, rectifying and wave-filtering supplies magnetic after being depressured by transformer T2
Filament in keyholed back plate, heater current are transformed into voltage by R14 sampling, and indirect feedback is isolated to MCU1, D9- by optocoupler U1
D11 is the protection circuit of R14 sample circuit.Filament voltage by a reference source IC1, optocoupler U2 indirect feedback to MCU1, MCU1 from
And control the pulse width adjustment filament voltage of MCU1-PWM3 in the reasonable scope.
Battery pack is powered by high voltage supply control unit to magnetron in the design, directly by cell voltage inversion to magnetic
It lies prostrate operating voltage more keyholed back plate the 4,000, reduces the process of intermediate secondary transformation, compare and traditional be from battery inversion
220V50HZ, then the voltage that magnetron can work is boosted to from 220V50HZ by Industrial Frequency Transformer, it is not only high-efficient, but also
Same battery capacity can work longer, very energy saving.
Preparation starts to sell when needing to heat, and by filament voltage circuit control filament, first normal fever reaches transmitting to MCU1
The state of electronics, then reach the normal work of magnetron by two port controlling high-pressure section voltages of MCU1-PWM1, MCU1-PWM2
The burning voltage of work, while MC1 detects the electric current of transformer T1 high pressure side section by MCU1-AD1, when electric current is stablized in magnetic control
When in pipe normal range of operation, MCU1 is compared by control MUC-PWM3 point sky turns down heater current.To reach prestissimo
It allows magnetron to enter steady-working state, reduces period accounting inefficient in heating process, increase the use of filament
Service life.
The above is only the preferred embodiments of the utility model, the utility model is not limited to the above embodiment, only
To realize that the technical solution of the utility model aim belongs within the protection scope of the utility model with essentially identical means.
Claims (6)
1. a kind of inverter circuit applied to automatic vending machine microwave heating system is arranged between battery pack and magnetron,
It is characterized in that, comprising: MCU (1) and the high voltage supply control unit (2) and filament power supply control that are connected respectively with MCU (1)
Unit (3), the battery pack are connected by high voltage supply control unit (2) with magnetron, the high voltage supply control unit (2)
For by the direct inversion of cell voltage be magnetron operating voltage, the filament supply control unit (3) respectively with battery pack, set
The filament set in magnetron is connected.
2. the inverter circuit according to claim 1 applied to automatic vending machine microwave heating system, it is characterised in that: institute
State high voltage supply control unit (2) include metal-oxide-semiconductor Q8, metal-oxide-semiconductor Q9, the first metal-oxide-semiconductor driving circuit, the second metal-oxide-semiconductor driving circuit,
Transformer T1, several capacitors, several resistance and several diodes；
The PMW1 output end of the MCU (1) is connected by the first metal-oxide-semiconductor driving circuit with the grid G of metal-oxide-semiconductor Q8, the metal-oxide-semiconductor
The drain D of Q8 is connected with low-voltage side coil one end of transformer T1, the source S ground connection of metal-oxide-semiconductor Q8, the low pressure of the transformer T1
Side feeder ear is connected for powering with battery pack；
The PMW2 output end of the MCU (1) is connected by the second metal-oxide-semiconductor driving circuit with the grid G of metal-oxide-semiconductor Q9, the metal-oxide-semiconductor
The drain D of Q9 is connected with the low-voltage side coil other end of transformer T1, the source S ground connection of metal-oxide-semiconductor Q8, and the source S of metal-oxide-semiconductor Q8 is logical
Capacitor C5 is crossed to be connected with low-pressure side feeder ear；
The high pressure lateral coil of the transformer T1 is connected by current rectifying and wave filtering circuit with magnetron, the current rectifying and wave filtering circuit and
The AD1 input terminal of MCU (1) is all grounded by current sampling circuit, with the operating current for MCU (1) detection magnetron；It is described
Current rectifying and wave filtering circuit is connected by bleeder circuit with the AD2 input terminal of MCU (1) with the common end of magnetron, to be used for MCU (1)
Detect the operating voltage of magnetron.
3. the inverter circuit according to claim 2 applied to automatic vending machine microwave heating system, it is characterised in that: institute
Stating the first metal-oxide-semiconductor driving circuit includes triode Q1, triode Q2, triode Q6, and the base stage of the triode Q1 passes through resistance
R1 is connected with the PMW1 output end of MCU (1), the emitter of triode Q1 ground connection, the collector of triode Q1 respectively with triode
The base stage of Q2, the base stage of triode Q6 are connected, the emitter of the triode Q2, triode Q6 collector all with metal-oxide-semiconductor Q8
Grid G be connected, the collector of triode Q2 is connected with low-voltage supply, and the emitter of triode Q6 is grounded, triode Q1
Collector be connected with the collector of triode Q2 by resistance R2.
4. the inverter circuit according to claim 2 applied to automatic vending machine microwave heating system, it is characterised in that: institute
Stating the second metal-oxide-semiconductor driving circuit includes triode Q3, triode Q5, triode Q7, and the base stage of the triode Q3 passes through resistance
R4 is connected with the PMW2 output end of MCU (1), the emitter of triode Q3 ground connection, the collector of triode Q3 respectively with triode
The base stage of Q5, the base stage of triode Q6 are connected, the emitter of the triode Q5, triode Q7 collector all with metal-oxide-semiconductor Q9
Grid G be connected, the collector of triode Q5 is connected with low-voltage supply, and the emitter of triode Q7 is grounded, triode Q3
Collector be connected with the collector of triode Q5 by resistance R6.
5. the inverter circuit according to claim 2 applied to automatic vending machine microwave heating system, it is characterised in that: institute
Stating current rectifying and wave filtering circuit includes diode D2, diode D3, diode D5, diode D6, capacitor C6 and capacitor C7, the electric current
Sample circuit includes resistance R17, diode D7 and resistance R19, and the bleeder circuit includes resistance R21, resistance R22, capacitor C8
With zener diode D12；
High pressure lateral coil one end of the transformer T1 is connected with the anode of the cathode of diode D2, diode D3 respectively, described
The cathode of diode D3 is connected with the power end of magnetron, the other end of high pressure lateral coil respectively with the anode of diode D5, two
The cathode of pole pipe D6 is connected, and the cathode of the diode D5 is connected with the power end of magnetron, the anode of the diode D6 and
The anode of diode D2 is connected, and the cathode of diode D5 is connected by capacitor C6 with the anode of diode D6, diode D2 and two
The common end of pole pipe D6 is connected by resistance R19 with the AD1 input terminal of MCU (1), and the common end of diode D2 and diode D6 are logical
Cross resistance R17, capacitor C7 and diode the D7 ground connection being connected in parallel to each other；The common end of diode D3 and diode D5 pass through resistance
R21 is connected with the AD2 input terminal of MCU (1), and the AD2 input terminal of MCU (1) passes through the zener diode D12, the resistance that are connected in parallel to each other
R22, capacitor C8 ground connection.
6. the inverter circuit according to claim 1 applied to automatic vending machine microwave heating system, it is characterised in that: institute
Stating filament supply control unit (3) includes triode Q4, transformer T2, photoelectrical coupler U1, photoelectrical coupler U2, a reference source
IC1, several resistance, several capacitors and several diodes；
The PMW3 output end of the MCU (1) is connected with the base stage of triode Q4, the emitter ground connection of the triode Q4, three poles
The collector of pipe Q4 and first siding ring one end of transformer T2, the first siding ring other end of the transformer T2 pass through resistance
R7 is connected so that for powering, the first siding ring other end of transformer T2 passes through the resistance R8, the capacitor that are sequentially connected in series with battery pack
C2 is connected with the collector of triode Q4；
Second siding ring one end of the transformer T2 passes through one end phase of diode D8, the inductance L1 and filament that are sequentially connected in series
Even, the second siding ring other end of transformer T2 passes through diode D9, diode D10, diode D11 and the filament being sequentially connected in series
The other end be connected, the common end of inductance L1 and diode D8 passes through the second siding ring of polarized capacitor CE1 and transformer T2
The other end is connected, and the common end of inductance L1 and filament passes through the polarized capacitor CE2 being connected in parallel to each other, capacitor C9, resistance R13 and becomes
The second siding ring other end of depressor T2 is connected；
The first output end of the photoelectrical coupler U1 is connected with the AD3 input terminal of MCU (1), and the second of photoelectrical coupler U1 is defeated
Outlet ground connection, the first output end of the photoelectrical coupler U2 is connected with the AD4 input terminal of MCU (1), and the of photoelectrical coupler U2
First output end of two output ends ground connection, photoelectrical coupler U1 is connected by resistance R11 with the end VCC of low-voltage supply, light
The first output end of electric coupler U2 is connected by resistance R12 with the end VCC of low-voltage supply；The first of photoelectrical coupler U1
Input terminal passes through resistance R15, the resistance R20 being sequentially connected in series and is connected with the common end of filament and diode D11, photoelectrical coupler U1
The second input terminal be connected with the common end of filament and diode D11 by resistance R14, the second input terminal of photoelectrical coupler U1
It is connected with the common end of resistance R13 and diode D9, the second input terminal of photoelectrical coupler U1 passes through capacitor C10 and resistance R15
It is connected with the common end of resistance R20；
The first input end of the photoelectrical coupler U2 is connected by resistance R23 with the pin 1 of a reference source IC1, photoelectrical coupler
The second input terminal of U2 is connected by resistance R16 with the pin 3 of a reference source IC1, the pin 2 of a reference source IC1 and filament and
The common end of diode D11 is connected, and is in series with capacitor C11 between the pin 3 and pin 1 of a reference source IC1, a reference source IC1's draws
Resistance R18 is in series between foot 2 and pin 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820671911.0U CN208241932U (en) | 2018-05-07 | 2018-05-07 | A kind of inverter circuit applied to automatic vending machine microwave heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820671911.0U CN208241932U (en) | 2018-05-07 | 2018-05-07 | A kind of inverter circuit applied to automatic vending machine microwave heating system |
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| CN208241932U true CN208241932U (en) | 2018-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820671911.0U Active CN208241932U (en) | 2018-05-07 | 2018-05-07 | A kind of inverter circuit applied to automatic vending machine microwave heating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111212491A (en) * | 2020-02-20 | 2020-05-29 | 烟台长青微波科技有限公司 | Filament current control device of variable-frequency microwave generating source |
-
2018
- 2018-05-07 CN CN201820671911.0U patent/CN208241932U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111212491A (en) * | 2020-02-20 | 2020-05-29 | 烟台长青微波科技有限公司 | Filament current control device of variable-frequency microwave generating source |
| CN111212491B (en) * | 2020-02-20 | 2020-11-24 | 烟台长青微波科技有限公司 | Filament current control device of variable-frequency microwave generating source |
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