CN106658806A - Digital magnetron power supply - Google Patents
Digital magnetron power supply Download PDFInfo
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- CN106658806A CN106658806A CN201710009736.9A CN201710009736A CN106658806A CN 106658806 A CN106658806 A CN 106658806A CN 201710009736 A CN201710009736 A CN 201710009736A CN 106658806 A CN106658806 A CN 106658806A
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- module
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/66—Circuits
- H05B6/664—Aspects related to the power supply of the microwave heating apparatus
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
- Microwave Tubes (AREA)
Abstract
Disclosed is a digital magnetron power supply. The digital magnetron power supply comprises a communication module (1), a control module (2), a voltage regulation module (3), an output module (4), an input protection module (5) and a detection module (6), wherein the communication module (1) adopts a standard MODBUS-RTU communication protocol; the control module (2) is used for receiving a control instruction from the communication module (1) to regulate and control the voltage regulation module in real time, and to receive and process detection data from the detection module (6) in real time; the voltage regulation module (3) is used for receiving a real-time adjustment control instruction from the control module (2), and receiving a voltage supplied by the input protection module (5) and outputting the voltage the output module (4); the communication module (1) and the control module (2) are in bidirectional communication, so that the digital control of the magnetron power supply is realized; a PID algorithm in the control module (2) can improve stability of output power; the input protection module (5) realizes protection of mains supply input and output; and real-time fault detection for fault problems in a circuit can be realized through the detection module (6).
Description
Technical field
The present invention relates to industrial power technical field, and in particular to a kind of digitized magnetron power source.
Background technology
Microwave heating has the advantages that homogeneous heating, speed are fast, the thermal efficiency is high, easy realization is automatically controlled.With it is traditional
Heating technique is compared, and microwave heating undoubtedly has great captivation and wide prospects for commercial application.And microwave power equipment
In core component be the Switching Power Supply for driving microwave source, its work efficiency and stability directly affect the whole of microwave equipment
Body performance.
Traditional magnetron drive power supply has two ways, and one kind is linear power supply, and one kind is pulsed drive power supply；Line
Property power supply using Industrial Frequency Transformer, diode, electric capacity composition voltage-multiplying circuit produce anode high voltage.The structure utilizes power frequency transformation
Device boosting produces high pressure, but due to frequency it is relatively low, it is tight to harmonic pollution in electric power net so such structural volume is big, heavy, loss is big
Weight, and the output power of power supply is non-adjustable, and power factor is low.In a word, current magnetron drive power supply design excessively falls
Afterwards, Digital Control low degree.
The content of the invention
For magnetron drive power supply volume is big, Digital Control low degree problem, the application provides a kind of digitized
Magnetron power source, including：Communication module, control module, voltage regulating module, output module, input protection module and detection module；
Communication module adopts standard MODBUS-RTU communications protocol；Control module is used to receive the control instruction of communication module
And real-time regulation control voltage regulating module, while the detection data of real-time reception and processing detection module；Voltage regulating module is used to receive
The real-time regulation control instruction of control module, and the voltage that receives input protection module is provided, while output voltage is to exporting mould
Block, being input into protection module is used for the protection that civil power is input into and exports, and detection module is used for the circuitry self test of magnetron power source；
Control module and the communication module two-way communication, communication module is realized using the communication of MODBUS-RTU standard agreements
The Digital Control of magnetron power source.
In a kind of embodiment, control module is built-in with pid algorithm, and pid algorithm is used to realize the steady regulation of output.
In a kind of embodiment, voltage regulating module includes high voltage adjusting unit and low pressure adjustment unit, and output module includes negative electrode
Negative high voltage output unit and filament drive voltage output unit, the input of high voltage adjusting unit and the input of low pressure adjustment unit
Civil power is connected in parallel in respectively, and the outfan of high voltage adjusting unit is connected to negative electrode negative high voltage output unit, low pressure adjustment unit
Outfan be connected to filament drive voltage output unit.
In a kind of embodiment, high voltage adjusting unit include be sequentially connected with separation metal-oxide-semiconductor bridge arm circuit, high frequency transformer and
Voltage-multiplying circuit.
In a kind of embodiment, low pressure adjustment unit includes city's electric control circuit and the Industrial Frequency Transformer being sequentially connected with.
In a kind of embodiment, detection module is additionally operable to detect the voltage parameter and current parameters in voltage regulating module, works as detection
During to failure, detection module to control module sends alarm signal control module according to the real-time startup separator detection of alarm signal.
In a kind of embodiment, input protection module includes over-current protecting unit, Overvoltage protecting unit and electromagnetic interface filter.
In a kind of embodiment, input protection module also include power factor calibration unit, power factor calibration unit it is defeated
Go out end and be connected to separation MOD pipe bridge arm circuits, the input of power factor calibration unit is with the input of city's electric control circuit simultaneously
It is coupled to the outfan of electromagnetic interface filter.
According to the digitized magnetron power source of above-described embodiment, because communication module is led to using MODBUS-RTU standard agreements
News realize the Digital Control of magnetron power source, by integrated, the diminution magnetron of each control circuit in magnetron power source
The volume of power supply.
Further, the pid algorithm by arranging in control module can adjust the steady of output according to the power of setting
It is qualitative.
Further, the detection module by increasing can realize the circuitry self test function of magnetron power source, in circuit
Failure problems can realize real-time fault detection.
Description of the drawings
Fig. 1 is digitized magnetron power source ultimate principle block diagram；
Fig. 2 is digitized magnetron power source member principle block diagram；
Fig. 3 is digitized magnetron power source output power stability test data figure.
Specific embodiment
Accompanying drawing is combined below by specific embodiment to be described in further detail the present invention.
In embodiments of the present invention, there is provided a kind of digitized magnetron power source, its schematic diagram is as shown in figure 1, specifically include
Following ingredient.
Element includes communication module 1, control module 2, voltage regulating module 3, output module 4, input protection module 5
With detection module 6.
Specifically, communication module 1 adopt MODBUS-RTU communications protocol so that control module 2 by communication module 1 with it is outer
MODBUS-RTU hardware in portion realizes communication；MODBUS is existed by Modicon (being now a brand of Schneider Electric Corp.)
Invention in 1979, be the real bus protocol for being used for industry spot in first, the whole world.There are two kinds of transmission in MODBUS systems
Pattern may be selected, and both transmission modes are equal with the ability that slave PC communicates, and MODBUS main frames used should be regarded during selection
Depending on, each MODBUS system can only use a kind of pattern, not allow both of which to use with, and a kind of pattern is that ASCII (believes in the U.S.
Breath permuted code), another kind of pattern is RTU (RTU), and this example is preferably RTU transmission modes.
Control module 2 is used to receive the control instruction and real-time regulation control voltage regulating module 3 of communication module 1, while in real time
The detection data with processing detection module 6 is received, and for adjusting the stationarity of output according to the setting value of power, specifically
, control module 2 is built-in with pid algorithm, and e.g., a certain setting value of power is 1300W, then can adjust magnetic by pid algorithm
The stability of keyholed back plate output power of power supply reaches 0.211%, realizes the accurate output and control of magnetron power source output, i.e.,
Magnetron power source miscellaneous part parameter drift, control module 2 is set also to realize the accurate compensation of output, the setting model of power
Enclose for 100.0W-1500.0W；In addition, control module 2 can also control magnetron heater driving voltage, filament preheating time can
With free setting, its set point is -60 seconds 5 seconds.
Control module 2 also has the function of the output calibration value of record magnetron power source, due at the beginning of magnetron power source
Beginning needs output to demarcate when using, first pass through external perimysium reference MODBUS-RTU hardware settings output for 100W, 375W,
750W, 1125W, 1500W, and these output setting values are recorded, the power setting initial value of record is passed through into MODBUS-
Rtu protocol writes control module 2, so as to reach the purpose of the output calibration value of the record magnetron power source of control module 2.
Voltage regulating module 3 is used to receive the real-time regulation control instruction of control module 2, and receives input protection module 5 is provided
Voltage, while output voltage mainly realizes the control of line voltage to output module 4, because magnetron needs negative electrode to supply
Electricity and filament are powered, and it is that negative high voltage is powered that negative electrode is powered, and it is low-voltage power supply that filament is powered, and voltage regulating module 3 is needed city respectively
Electricity is adjusted to high pressure and low pressure two-way, as shown in Fig. 2 the voltage regulating module 3 of this example includes that high voltage adjusting unit 31 and low pressure are adjusted
Unit 32, accordingly, output module 4 includes negative electrode negative high voltage output unit 41 and filament drive voltage output unit 42, high pressure
The input of adjustment unit 31 and the input of low pressure adjustment unit 32 are connected in parallel in respectively civil power, high voltage adjusting unit 31 it is defeated
Go out end and be connected to negative electrode negative high voltage output unit 41, the outfan of low pressure adjustment unit 32 is connected to filament drive voltage output list
Unit 42.
Further, high voltage adjusting unit 31 includes the separation metal-oxide-semiconductor bridge arm circuit 311, high frequency transformer 312 being sequentially connected with
With voltage-multiplying circuit 313, low pressure adjustment unit 32 includes city's electric control circuit 321 for being sequentially connected with and Industrial Frequency Transformer 322, and city
Electric control circuit 321 is preferably relay switching circuit.
Further, it is different from the potential reference point of control module 2 due to separating metal-oxide-semiconductor bridge arm circuit 311, dividing in this example
Isolation drive is also add between metal-oxide-semiconductor bridge arm circuit 311 and control module 2, isolation drive is led to by the way of Magnetic isolation
Cross the coiling on magnet ring and realize magnetic coupler, magnet ring input winding receives the switching signal that control module 2 sends, magnet ring output around
Group is received to be driven after switching signal and separates metal-oxide-semiconductor bridge arm circuit 311.
Further, the input that the input protection module 5 of this example realizes civil power has friendship profit with the protection and raising electrical network that go out
With rate, the input for being input into protection module 5 is electrically connected with city, and outfan is connected with voltage regulating module 3, and being input into protection module 5 includes
Over-current protecting unit 51, Overvoltage protecting unit 52, electromagnetic interface filter 53 and power factor calibration unit 54, power factor is compared with original
The outfan of unit 54 is connected to separation MOD pipes bridge arm circuit 311, input and city's electric control electricity of power factor calibration unit 54
The input on road 321 is parallel to the outfan of electromagnetic interface filter 53.
The low-pass filter circuit that electromagnetic interface filter 53 is generally made up of current-limiting reactor and shnt capacitor, its effect is fair
Perhaps frequency signal access arrangement during equipment normal work, and have larger inhibition to the interference signal of high frequency.
Further, detection module 6 realizes the overall automatic detection of magnetron power source, e.g., input and output parameter detection,
Internal circuit nodes and failure predication etc., the outfan of detection module 6 is connected to control module 2, when fail result is detected,
Detection module 6 to control module 2 sends alarm signal, and control module 2 is detected according to the real-time startup separator of alarm signal, and will be former
Barrier signal digitized is transferred to external perimysium reference MODBUS-RTU parts by MODBUS communications protocol.
Specifically, the real-time detection magnetron power source of detection module 6 actual output voltage, output current；When detection module 6
When detecting that magnetron power source actual output voltage is more than ± the 10% of the first setting value with the deviation of predeterminated voltage, detection module
6 to the output alarm signal of control module 2；When detection module 6 detects magnetron power source actual output current with predetermined current
When deviation is more than ± the 5% of the second setting value, detection module 6 is to the output alarm signal of control module 2；Detection module 6 is according to reality
Border output voltage and actual output current calculate real output, when the deviation of real output and predetermined power is more than the
Three setting values ± 0.5% when, to the output alarm signal of control module 2, control module 2 is according to alarm signal reality for detection module 6
The corresponding fault detects of Shi Qidong.
In addition, detection module 6 also real-time detection magnetron heater driving voltage controlled state, driving voltage, driving current,
The effectiveness of real-time monitoring magnetron heater driving voltage, e.g., when magnetron heater driving voltage and default filament drive voltage
Deviation more than filament voltage rated value ± 10% when, detection module 6 works as magnetron to the output alarm signal of control module 2
The deviation of filament drive electric current and default filament drive electric current more than heater current rated value ± 10% when, detection module 6 to
The output alarm signal of control module 2.
In addition, detection module 6 goes back Real-time Collection temperature detection signal, detection signal type is that thermal resistance signal and temperature are opened
OFF signal.Temperature detection mainly includes but is not limited to transformer temperature, power component temperature, rectifier bridge temperature etc..
In addition, detection module 6 is also detected including other, mainly including but not limited to mains input voltage circuit parameter inspection
Survey, input protection element validation checking, key componentses are detected.
Driven by magnetron is realized according to the digitized magnetron power source of above-mentioned offer, and excitation forms microwave plasma,
Specifically, according to each component entity in the digitized magnetron power source chosen, and with reference to Zhejiang Quan Shi Science and Technology Ltd.s MPT phases
Product is closed, the magnetron Continuous Drive of 1500W is realized, and encourages generation microwave plasma torch, the digitized magnetron of this example
The stability of output power of power supply is as shown in Figure 3.
Communication module 1 is MODBUS-RTU circuits, specifically adopts RS485 chips, control module 2 to adopt LPC1765, is realized
Alarm signal, output of control voltage regulating module 3 of communication, acquisition testing module 6 feedback with communication module 1 etc..
Over-current protecting unit 51 adopts T15AH250V for explosion-proof ceramic electric fuse, belongs to slow fusing type, and maximum conveyance capacity is
15A, Overvoltage protecting unit 52 realizes that electromagnetic interface filter 53 can eliminate low pass common mode using varistor with gas-discharge tube design
Noise and differential mode noise, are made up of common mode choke with X, Y capacitance, can effectively prevent the noise in Switching Power Supply outwards to release
Put, while can also suppress the interference of surge, burst of pulses, electrostatic etc., power factor calibration unit 54 adopts the STK760, STK760 to be
PFC module, realizes PFC, improves the effective rate of utilization of mains-supplied, protects when the civil power of input passes sequentially through excessively stream
After shield unit 51, Overvoltage protecting unit 52, electromagnetic interface filter 53 and power factor calibration unit 54, it is straight that civil power is converted into 380VDC
Stream voltage, input civil power scope is 90VAC-264VAC.
Separate metal-oxide-semiconductor bridge arm circuit 311 and build bridge arm circuit using metal-oxide-semiconductor is separated, MOS is realized using capacitance-resistance, diode
The protection of pipe, by switching bridge arm circuit realiration inversion, by positive 380V DC voltages pulse voltage is converted to, meanwhile, control mould
Block 22 separates the control that metal-oxide-semiconductor bridge arm circuit 311 realizes pulse voltage according to device requirement output switch drive signal to drive.
High frequency transformer 312 is exported after pulse voltage is boosted, and conversion is for about the alternating voltage of 1200V.
Voltage-multiplying circuit 313 realizes four multiplication of voltages, is negative 4800V DC voltages by multiplication of voltage after the ac voltage rectifier of 1200V, and
Powered for magnetron cathode by negative electrode negative high voltage output unit 41.
City's electric control circuit 321 is controlled using relay switching to line voltage, and Industrial Frequency Transformer 322 is electric by civil power
Pressure 220VAC is transformed into the running voltage about 4.6VAC of magnetron heater, meanwhile, working condition of the control module 2 according to magnetron
The running voltage of real-time control magnetron heater.
Detection module 6 realize input voltage circuit parameter detection, input protection module 5 in element validation checking,
STK760 output validation checkings, the current detecting of separation metal-oxide-semiconductor bridge arm circuit 311, the driving of separation metal-oxide-semiconductor bridge arm circuit 311 have
The detection of effect property, the validation checking of high frequency transformer 312, the output Symmetry Detection of voltage-multiplying circuit 313, the inspection of output voltage circuit parameter
Survey, the validation checking of city's electric control circuit 321, Industrial Frequency Transformer 322 output validation checking, the inspection of filament drive voltage x current
Survey, and output detection, magnetron temperature detection and radiator temperature detection etc..
Use above specific case is illustrated to the present invention, is only intended to help and understands the present invention, not to limit
The system present invention.For those skilled in the art, according to the thought of the present invention, can also make some simple
Deduce, deform or replace.
Claims (8)
1. a kind of digitized magnetron power source, it is characterised in that include：Communication module (1), control module (2), voltage regulating module
(3), output module (4), input protection module (5) and detection module (6)；
The communication module (1) is using standard MODBUS-RTU communications protocol；Control module (2) is for receiving communication module (1)
Control instruction and real-time regulation control voltage regulating module (3), while the detection data of real-time reception and processing detection module (6)；
Voltage regulating module (3) is for receiving the real-time regulation control instruction of control module (2), and receives input protection module (5) is provided
Voltage, while output voltage is to output module (4), is input into protection module (5) and is input into and the protection for exporting for civil power, detects mould
Block (6) for magnetron power source circuitry self test；
The control module (2) and the communication module (1) two-way communication, communication module (1) is assisted using MODBUS-RTU standards
View communication realizes the Digital Control of magnetron power source.
2. digitized magnetron power source as claimed in claim 1, it is characterised in that the control module (2) is built-in with PID calculations
Method, the pid algorithm is used to realize the steady regulation of output.
3. digitized magnetron power source as claimed in claim 2, it is characterised in that the voltage regulating module (3) includes that high pressure is adjusted
Section unit (31) and low pressure adjustment unit (32), the output module (4) is including negative electrode negative high voltage output unit (41) and filament
Driving voltage output unit (42), the input of the high voltage adjusting unit (31) and the input difference of low pressure adjustment unit (32)
The civil power is connected in parallel in, the outfan of the high voltage adjusting unit (31) is connected to the negative electrode negative high voltage output unit
(41), the outfan of the low pressure adjustment unit (32) is connected to the filament drive voltage output unit (42).
4. digitized magnetron power source as claimed in claim 3, it is characterised in that the high voltage adjusting unit (31) includes suitable
Separation metal-oxide-semiconductor bridge arm circuit (311) of secondary connection, high frequency transformer (312) and voltage-multiplying circuit (313).
5. digitized magnetron power source as claimed in claim 4, it is characterised in that the low pressure adjustment unit (32) includes suitable
City's electric control circuit (321) and Industrial Frequency Transformer (322) of secondary connection.
6. digitized magnetron power source as claimed in claim 5, it is characterised in that the detection module (6) is additionally operable to detection
Voltage parameter and current parameters in the voltage regulating module (3), when detection is out of order, the detection module (6) is to the control
Molding block (2) sends alarm signal, and the control module (2) is according to the real-time startup separator detection of the alarm signal.
7. digitized magnetron power source as claimed in claim 6, it is characterised in that the input protection module (5) included
Stream protection location (51), Overvoltage protecting unit (52) and electromagnetic interface filter (53).
8. digitized magnetron power source as claimed in claim 7, it is characterised in that the input protection module (5) also includes
Power factor calibration unit (54), the outfan of the power factor calibration unit (54) is connected to the separation MOD pipe bridge arms
Circuit (311), the input of the power factor calibration unit (54) is in parallel with the input of city's electric control circuit (321)
In the outfan of the electromagnetic interface filter (53).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710009736.9A CN106658806A (en) | 2017-01-06 | 2017-01-06 | Digital magnetron power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710009736.9A CN106658806A (en) | 2017-01-06 | 2017-01-06 | Digital magnetron power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106658806A true CN106658806A (en) | 2017-05-10 |
Family
ID=58844278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710009736.9A Pending CN106658806A (en) | 2017-01-06 | 2017-01-06 | Digital magnetron power supply |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649792A (en) * | 2019-08-29 | 2020-01-03 | 合肥博雷电气有限公司 | Modular microwave power supply |
| CN112947174A (en) * | 2021-02-03 | 2021-06-11 | 昆明理工大学 | Intelligent microwave reactor system capable of expanding multi-microwave-source cooperative output |
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|---|---|---|---|---|
| US5495209A (en) * | 1995-04-14 | 1996-02-27 | Hughes Missile Systems Company | Switched-inverter modulator for producing modulated high voltage pulses |
| CN101106846A (en) * | 2006-09-13 | 2008-01-16 | 阮世良 | A driving power and control method for magnetic control tube |
| CN201556599U (en) * | 2009-09-14 | 2010-08-18 | 天水华圆制药设备科技有限责任公司 | Special driving power supply for magnetrons |
| CN103237378A (en) * | 2013-05-13 | 2013-08-07 | 南京三乐电子信息产业集团有限公司 | L-waveband high-power microwave energy generator |
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2017
- 2017-01-06 CN CN201710009736.9A patent/CN106658806A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5495209A (en) * | 1995-04-14 | 1996-02-27 | Hughes Missile Systems Company | Switched-inverter modulator for producing modulated high voltage pulses |
| CN101106846A (en) * | 2006-09-13 | 2008-01-16 | 阮世良 | A driving power and control method for magnetic control tube |
| CN101106846B (en) * | 2006-09-13 | 2011-09-21 | 阮世良 | A driving power and control method for magnetic control tube |
| CN201556599U (en) * | 2009-09-14 | 2010-08-18 | 天水华圆制药设备科技有限责任公司 | Special driving power supply for magnetrons |
| CN103237378A (en) * | 2013-05-13 | 2013-08-07 | 南京三乐电子信息产业集团有限公司 | L-waveband high-power microwave energy generator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649792A (en) * | 2019-08-29 | 2020-01-03 | 合肥博雷电气有限公司 | Modular microwave power supply |
| CN112947174A (en) * | 2021-02-03 | 2021-06-11 | 昆明理工大学 | Intelligent microwave reactor system capable of expanding multi-microwave-source cooperative output |
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