CN108495395A - A kind of digital induction heating power control system and control method - Google Patents
A kind of digital induction heating power control system and control method Download PDFInfo
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- CN108495395A CN108495395A CN201810298198.4A CN201810298198A CN108495395A CN 108495395 A CN108495395 A CN 108495395A CN 201810298198 A CN201810298198 A CN 201810298198A CN 108495395 A CN108495395 A CN 108495395A
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- 230000006698 induction Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000010438 heat treatment Methods 0.000 title claims abstract description 25
- 238000004891 communication Methods 0.000 claims abstract description 16
- 238000005516 engineering process Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
Abstract
The invention discloses a kind of digital induction heating power control system and control methods comprising sequentially connected rectification and filter circuit, full bridge inverter and induction coil and load blocks further include the digital signal processing unit being connected with each other and microcontroller processing unit；The digital signal processing unit is connected with operation panel and display module and communication module；The microcontroller processing unit is connected with temperature sensor module, analog quantity control module and soft start and automatic preheating control module.The present invention have flexibly it is controllable, have a wide range of application, failure rate is low and steady performance.
Description
Technical field
The present invention relates to a kind of power control system more particularly to a kind of digital induction heating power control system and controls
Method processed.
Background technology
Traditional induction heating power control system based on analog chip control due to waveform generation, working frequency
The action of the cores such as locking phase is all made of analog chip to complete, therefore the control chip in control system only serves start-up and shut-down control, letter
The periphery effects such as list is protected and display screen is shown.Such as by typically based on the induction heating power of analogue technique for, use
CD4046 hardware phase-locked-loops are locked working frequency and are generated the waveform of need of work using SG3525, since CD4046 can only
Output phase locking signal, so the deviation of locking phase can not be learnt, there are no the controls of image of Buddha software to carry out clever control livelock phase like that
Misalignment angle is to play flexible adjustment working frequency and in the light of actual conditions carry out the purpose of protection power source safety.Especially not
With under load service condition, the simulation locking phase of simple function is unable to get the purpose of flexible Application at all；Equally, using SG3525
The waveform of output is also due to the freedom and flexibility of the limitation of hardware, flexible output waveform as no image of Buddha software, such as pulse width
Adjustment, control etc. of following one's bent of output frequency.Therefore one of its presence drawback is：The generation of locking phase and frequency is to make
It is completed with different analog chips, the communication of two chip chambers is also simple level relationship, can not complete more information and hand over
It changes.
Generally speaking, the application category of traditional induction heating power based on analog chip technology is typically only confined to
Some specific application of certain industries, application range are narrow.Want to apply in different industries, it is necessary to carefully adjustment electricity
Road parameter can not ensure sensing heating electricity at all when loading dynamic range larger (load characteristic varies with temperature bigger)
The stability in source, because there is the defects of failure rate is generally higher, and performance is more unstable.
Invention content
In order to overcome the deficiencies of the prior art and there are the problem of, the present invention provides a kind of digital induction heating power control
System and and control method, have flexibly it is controllable, have a wide range of application, failure rate is low and steady performance.
The present invention is achieved by the following technical solutions：A kind of digital induction heating power control system comprising
Sequentially connected rectification and filter circuit, full bridge inverter and induction coil and load blocks, the rectification and filtered electrical
Road further includes the digital signal processing unit and microcontroller processing unit of interconnection for connect with power module, described
The voltage signal and current signal of the output end of rectification and filter circuit feed back to the digital signal processing unit, full-bridge inverting
The current signal of circuit output end feeds back to the digital signal processing unit；
The digital signal processing unit is connected with operation panel and display module and communication module；The microcontroller
Device processing unit is connected with temperature sensor module, analog quantity control module and soft start and automatic preheating control module.
Further, the microcontroller processing unit is also associated with wind turbine and fault alarm output module.
Further, the microcontroller processing unit is also associated with buzzer and extends out display.
Preferably, the full bridge inverter is IGBT H bridge full bridge inverters；The temperature sensor module is heat
Quick resistance temperature sensor.
Preferably, the communication module is 485 communication modules.
The present invention also provides a kind of controls applied in above-described digital induction heating power control system
Method, the control method step include：
S1, the system electrification is given, after the system completes hardware initialization, loading system data；
After S2, load data success, after system enters standby mode, the various displays needed for man-machine interface are updated
Content；
S3, operation panel and the communication information in communication module are obtained；
The peripheral equipment of S4, control system；
S5, protection detection is carried out to system equipment；
S6, judge whether the order of control system operation is effective, if then selecting and entering corresponding mode of operation,
If otherwise returning to state；
Whether S7, detection load are normal, then enter equipment running status if normal, otherwise return to standby mode；
S8, after the system enters equipment running status, utilize digital Phase Lock Technique, real-time tracking load resonance
Frequency, and the working frequency of system is made to control always in the resonant frequency of load, to ensure the system operation efficient
Working condition in.
Further, the step S8 further includes：Using dynamic electric sensibility reciprocal identification technology, in induction coil and load blocks
Induction coil carry out parameter identification, with search out may make the system to work in efficient operating status work frequency
Rate；The system also utilizes dynamic electric sensibility reciprocal identification technology, is identified by the material to load, and according to the material identified
The heated condition of matter automatic adjustment system, so that system works in efficient operating status.
Preferably, the step S8 further includes：The system, using fuzzy control technology, passes through base in operating status
It acts in PWM+PFM pulsewidth modulations and frequency modulation(PFM), the voltage of system, electric current and power is closed in real time simultaneously with realizing
Ring pre-computation, so that the system is in the operating status of constant output.
Digital induction heating power control system and control method provided by the invention, using digital Phase Lock Technique,
The resonant frequency of real-time tracking load, can be such that the working frequency of system controls always in the resonant frequency of load, to ensure
The system operation is in efficient working condition；And the system utilizes dynamic electric sensibility reciprocal identification technology, to induction coil and
The carry out parameter identification of induction coil in load blocks, may make the system to work in efficient operating status to search out
Working frequency；The system also utilizes dynamic electric sensibility reciprocal identification technology, is identified by the material to load, and according to knowledge
The heated condition for the material automatic adjustment system not gone out, so that system works in efficient operating status；In addition, the system
System also uses fuzzy control technology, by being based on PWM+PFM pulsewidth modulations and frequency modulation(PFM) while acting, to realize in real time to being
Voltage, electric current and the power of system carry out closed loop pre-computation, so that the system is in the operation shape of constant output
State.
Compared with prior art, digital induction heating power control system provided by the invention have flexibly it is controllable, answer
Wide with range, failure rate is low and steady performance.
Description of the drawings
Fig. 1 is the structural schematic block diagram of digital induction heating power control system described in the embodiment of the present invention.
Fig. 2 is the method flow schematic block diagram of control method described in the embodiment of the present invention.
Specific implementation mode
For the ease of the understanding of those skilled in the art, the present invention is made below in conjunction with the drawings and specific embodiments further
Detailed description.
As shown in Fig. 1, a kind of digital induction heating power control system comprising sequentially connected rectification and filtering
Circuit, full bridge inverter and induction coil and load blocks, the rectification and filter circuit are used to connect with power module,
It further include the output end of the digital signal processing unit being connected with each other and microcontroller processing unit, the rectification and filter circuit
Voltage signal and current signal feed back to the digital signal processing unit, the current signal of full bridge inverter output end is anti-
It is fed to the digital signal processing unit；The digital signal processing unit is connected with operation panel and display module, Yi Jitong
Interrogate module；The microcontroller processing unit is connected with temperature sensor module, analog quantity control module and soft start and oneself
Dynamic warm-up control module.
As preferred embodiment, the microcontroller processing unit is also associated with wind turbine and fault alarm output module；
The microcontroller processing unit is also associated with buzzer and extends out display.
As preferred embodiment, the full bridge inverter is preferably IGBT H bridge full bridge inverters；The temperature
Sensor assembly is preferably thermistor temperature sensor；The communication module is preferably 485 communication modules.
The embodiment of the present invention additionally provides a kind of be applied in above-described digital induction heating power control system
Control method, the control method step includes：
S1, the system electrification is given, after the system completes hardware initialization, loading system data；Wherein, the system
The hardware initialization of system, including reservoir initialization, all preparations etc. before the initialization of hardware external equipment and system operation；
After S2, load data success, after system enters standby mode, the various displays needed for man-machine interface are updated
Content；
S3, operation panel and the communication information in communication module are obtained；
The peripheral equipment of S4, control system, the peripheral equipment include wind turbine, alarm output module, and buzzer extends out display
Device etc.；
S5, carry out protection detection to system equipment, in the present embodiment, equipment protection monitoring include overvoltage detect, under-voltage prison
Survey, the detection of busbar over-current detection, output current limiting and overcurrent protection detection etc.；
S6, judge whether the order of control system operation is effective, if then selecting and entering corresponding mode of operation,
If otherwise returning to state；In the embodiment of the present invention, the operational module of the system includes under-voltage drop volume operational mode, overvoltage limit
Flow operational mode, output-constant operation pattern, output current limiting operational mode etc.；The operating mode of the system is all in accordance with current device
Working condition, the situation of load and power grid is automatically adjusted；
Whether S7, detection load are normal, then enter equipment running status if normal, otherwise return to standby mode；
S8, after the system enters equipment running status, utilize digital Phase Lock Technique, real-time tracking load resonance
Frequency, and the working frequency of system is made to control always in the resonant frequency of load, to ensure the system operation efficient
Working condition in.Utilize digital Phase Lock Technique, it is ensured that the system operation, can in real time certainly in the efficient state of Sofe Switch
Motion tracking load resonant frequency, to may make the working frequency of system always work in the resonant frequency of load (even if
System working frequency it is identical or of substantially equal with the working frequency of load), using digital Phase Lock Technique come in real time oneself
The advantages that resonant frequency of motion tracking load, has tracking velocity fast, and precision is high, highly reliable, capture bandwidth.
The particular flow sheet of the control method of the embodiment of the present invention sees attached drawing 2.
As preferred embodiment, the step S8 further includes：Using dynamic electric sensibility reciprocal identification technology, to induction coil and
The carry out parameter identification of induction coil in load blocks, may make the system to work in efficient operating status to search out
Working frequency；The system also utilizes dynamic electric sensibility reciprocal identification technology, is identified by the material to load, and according to knowledge
The heated condition of material (such as iron, the stainless steel or aluminium material) automatic adjustment system not gone out, so that system works in height
In the operating status of effect.Using dynamic electric sensibility reciprocal identification technology, accurately intelligent search it can go out the system and most efficiently work
Frequency.
In addition, preferably, in the embodiment of the present invention, the step S8 further includes：The system is adopted in operating status
With fuzzy control technology, by being based on PWM+PFM pulsewidth modulations and frequency modulation(PFM) while acting, to realize in real time to the electricity of system
Pressure, electric current and power carry out closed loop pre-computation, so that the system is in the operating status of constant output.
Digital induction heating power control system and control method provided by the invention, using digital Phase Lock Technique,
The resonant frequency of real-time tracking load, can be such that the working frequency of system controls always in the resonant frequency of load, to ensure
The system operation is in efficient working condition；And the system utilizes dynamic electric sensibility reciprocal identification technology, to induction coil and
The carry out parameter identification of induction coil in load blocks, may make the system to work in efficient operating status to search out
Working frequency；The system also utilizes dynamic electric sensibility reciprocal identification technology, is identified by the material to load, and according to knowledge
The heated condition for the material automatic adjustment system not gone out, so that system works in efficient operating status；In addition, the system
System also uses fuzzy control technology, by being based on PWM+PFM pulsewidth modulations and frequency modulation(PFM) while acting, to realize in real time to being
Voltage, electric current and the power of system carry out closed loop pre-computation, so that the system is in the operation shape of constant output
State.
Above-described embodiment is the preferable realization method of the present invention, is not limited to the present invention, is not departing from this hair
Under the premise of bright inventive concept, any obvious replacement is within protection scope of the present invention.
Claims (10)
1. a kind of digital induction heating power control system and control method, it is characterised in that：The system comprises connect successively
The rectification connect and filter circuit, full bridge inverter and induction coil and load blocks, the rectification and filter circuit are used for
Connect with power module, further include be connected with each other digital signal processing unit and microcontroller processing unit, the rectification and
The voltage signal and current signal of the output end of filter circuit feed back to the digital signal processing unit, and full bridge inverter is defeated
The current signal of outlet feeds back to the digital signal processing unit；
The digital signal processing unit is connected with operation panel and display module and communication module；At the microcontroller
Reason unit is connected with temperature sensor module, analog quantity control module and soft start and automatic preheating control module.
2. digital induction heating power control system according to claim 1, it is characterised in that：At the microcontroller
Reason unit is also associated with wind turbine and fault alarm output module.
3. digital induction heating power control system according to claim 2, it is characterised in that：At the microcontroller
Reason unit is also associated with buzzer and extends out display.
4. digital induction heating power control system according to claim 1, it is characterised in that：The full-bridge inverting electricity
Road is IGBT H bridge full bridge inverters.
5. the digital induction heating power control system according to any one of Claims 1 to 4, it is characterised in that：
The temperature sensor module is thermistor temperature sensor.
6. digital induction heating power control system according to claim 5, it is characterised in that：The communication module is
485 communication modules.
7. a kind of digital induction heating power control system and control method, which is characterized in that the control method is applied to
In digital induction heating power control system described in any one of claim 1~6, the control method step packet
It includes：
S1, the system electrification is given, after the system completes hardware initialization, loading system data；
After S2, load data success, after system enters standby mode, update is various to be needed in the display for man-machine interface
Hold；
S3, operation panel and the communication information in communication module are obtained；
The peripheral equipment of S4, control system；
S5, protection detection is carried out to system equipment；
S6, judge whether the order of control system operation is effective, if then selecting and entering corresponding mode of operation, if not
Then return to state；
Whether S7, detection load are normal, then enter equipment running status if normal, otherwise return to standby mode；
S8, after the system enters equipment running status, utilize digital Phase Lock Technique, real-time tracking load resonance frequency
Rate, and the working frequency of system is made to control always in the resonant frequency of load, to ensure the system operation efficient
In working condition.
8. control method according to claim 7, which is characterized in that the step S8 further includes：Utilize dynamic electric sensibility reciprocal
Identification technology, the carry out parameter identification to the induction coil in induction coil and load blocks, may make the system to search out
System works in the working frequency of efficient operating status.
9. control method according to claim 8, which is characterized in that the step S8 further includes：The system utilizes dynamic
State inductance value identification technology, is identified by the material to load, and adding according to the material automatic adjustment system identified
Warm status, so that system works in efficient operating status.
10. the control method according to any one of claim 7~9, which is characterized in that the step S8 further includes：
The system is in operating status, using fuzzy control technology, by being based on PWM+PFM pulsewidth modulations and frequency modulation(PFM) while moving
Make, closed loop pre-computation is carried out to the voltage of system, electric current and power in real time to realize, so that the system is in constant
The operating status of output power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810298198.4A CN108495395B (en) | 2018-04-04 | 2018-04-04 | All-digital induction heating power supply control system and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810298198.4A CN108495395B (en) | 2018-04-04 | 2018-04-04 | All-digital induction heating power supply control system and control method |
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| Publication Number | Publication Date |
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| CN108495395A true CN108495395A (en) | 2018-09-04 |
| CN108495395B CN108495395B (en) | 2024-01-26 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7308460A (en) * | 1972-06-16 | 1973-12-18 | ||
| JPH05213505A (en) * | 1992-02-04 | 1993-08-24 | Yaskawa Electric Corp | Roller drive control method |
| CN201584935U (en) * | 2009-07-02 | 2010-09-15 | 陕西科技大学 | High-voltage motor soft-start device based on PLC |
| CN101965072A (en) * | 2009-07-22 | 2011-02-02 | 深圳市阿尔法变频技术有限公司 | Full digital electromagnetic heater |
| CN107135564A (en) * | 2017-07-02 | 2017-09-05 | 中国计量大学 | A kind of pulsed induction heating power of the digital frequency-tracking of modified |
| CN208572475U (en) * | 2018-04-04 | 2019-03-01 | 东莞合拓电子科技有限公司 | A kind of digital induction heating power control system |
-
2018
- 2018-04-04 CN CN201810298198.4A patent/CN108495395B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7308460A (en) * | 1972-06-16 | 1973-12-18 | ||
| JPH05213505A (en) * | 1992-02-04 | 1993-08-24 | Yaskawa Electric Corp | Roller drive control method |
| CN201584935U (en) * | 2009-07-02 | 2010-09-15 | 陕西科技大学 | High-voltage motor soft-start device based on PLC |
| CN101965072A (en) * | 2009-07-22 | 2011-02-02 | 深圳市阿尔法变频技术有限公司 | Full digital electromagnetic heater |
| CN107135564A (en) * | 2017-07-02 | 2017-09-05 | 中国计量大学 | A kind of pulsed induction heating power of the digital frequency-tracking of modified |
| CN208572475U (en) * | 2018-04-04 | 2019-03-01 | 东莞合拓电子科技有限公司 | A kind of digital induction heating power control system |
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| Publication number | Publication date |
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| CN108495395B (en) | 2024-01-26 |
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