CN104902601A - Novel variable frequency heating system - Google Patents
Novel variable frequency heating system Download PDFInfo
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- CN104902601A CN104902601A CN201510239662.9A CN201510239662A CN104902601A CN 104902601 A CN104902601 A CN 104902601A CN 201510239662 A CN201510239662 A CN 201510239662A CN 104902601 A CN104902601 A CN 104902601A
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- frequency heating
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 34
- 238000005070 sampling Methods 0.000 claims abstract description 26
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 239000004065 semiconductor Substances 0.000 claims description 15
- 230000000694 effects Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The present invention relates to the technical field of heating systems and particular relates to a novel variable frequency heating system which comprises a heater and a microprocessor and further comprises a rectifying and filtering unit. The input end of the rectifying and filtering unit is connected to an AC power supply. A series connection loop is formed by the rectifying and filtering unit and the heater through a power switch tube. The series connection loop is internally provided with a current sampling resistor which is connected to the microprocessor through a current sampling unit. The microprocessor is connected to the power switch tube through a PWM control unit. By employing the above structure, the current in a heating series connection loop is collected through the current sampling unit, then the microprocessor outputs a PWM wave to the PWM control unit to adjust PWM waveform and output the PWM waveform to the power switch tube, and thus the variable frequency heating of the heating series connection loop is realized. The system has the advantages of the real-time control of variable frequency heating, energy saving, and good control effect.
Description
Technical field
The present invention relates to heating system technical field, particularly a kind of Novel variable-frequency heating system.
Background technology
The progress of science and technology leads society to move towards intelligent, energy-saving, and nowadays increasing new science and technology innovative product changes our world gradually, gives life and produces and bring new change.In modern industrial production, the consumption of electric energy is the one that in producing, all energy resource consumptions are maximum, so power consumption will be reduced as much as possible, allow limited electric energy for we create more value.
Chinese utility model patent CN 203757830 U discloses a kind of varible-frequency electromagnetic heater, comprise heating tank, electric control box and frequency converter, heating tank comprises the elbow of steel pipe and the connection of steel pipe two ends, and heating tank outer felt is wound with coil, and electric control box is connected with coil by frequency converter; Also have one section of auxiliary heating pipe in described steel pipe, auxiliary heating pipe is connected with steel pipe upper end.Although this patent application can avoid thermal losses greatly, ensure that heating effect; But converter technique aspect is not improved.
Summary of the invention
The technical issues that need to address of the present invention provide a kind of Novel variable-frequency heating system by PWM control realization variable-frequency heating.
For solving above-mentioned technical problem, a kind of Novel variable-frequency heating system of the present invention comprises heater and microprocessor, also comprise rectification filtering unit, described rectification filtering unit input is connected with AC power, described rectification filtering unit forms series loop by power switch pipe and heater, current sampling resistor is provided with in described series loop, described current sampling resistor is connected with microprocessor by current sampling unit, and described microprocessor is connected with power switch pipe by PWM control unit.
Further, described heater is provided with temperature sensor, described temperature sensor is connected with microprocessor by A/D converter.
Further, described PWM control unit comprises metal-oxide-semiconductor J1, and the drain electrode of described metal-oxide-semiconductor J1 is by resistance R7 ground connection, and the source electrode of described metal-oxide-semiconductor J1 is connected with power switch pipe; Diode D1 and resistance R4 is parallel with between the grid of described metal-oxide-semiconductor J1 and source electrode; The grid of described metal-oxide-semiconductor J1 is connected with the collector electrode of triode Q1 by resistance R5, the grounded emitter of described triode Q1, the base stage of described triode Q1 is connected with triode Q2 emitter, be connected with diode D2 between described triode Q2 base stage and emitter, the base stage of described triode Q2 is connected with microprocessor by resistance R6.
Further, sampling unit is connected with between described microprocessor and power switch pipe, described sampling unit comprises series resistance R1 and R2, the described resistance R1 other end is connected with microprocessor, the described resistance R2 other end is connected with power switch pipe, and the intermediate connection point of described resistance R1 and resistance R2 is by resistance R3 ground connection.
Further, described current sampling unit comprises rectification circuit, filter circuit, bleeder circuit and the amplifying circuit of connecting successively.
Further, described rectification circuit is the full bridge rectifier that diode D3, D4, D5 and D6 are formed, described filter circuit is C4, described bleeder circuit is the series connection bleeder circuit of resistance R9 and R10, described amplifying circuit is amplifier U1, the intermediate connection point of described resistance R9 with R10 is connected with amplifier U1 electrode input end by resistance R11, and described amplifier U1 negative input is by resistance R12 ground connection, and described amplifier U1 output is connected with microprocessor.
After adopting said structure, the present invention is by the electric current in current sampling unit collection heating series loop, and then microprocessor exports PWM ripple to PWM control unit adjustment PWM wave form output to power switch pipe, thus realizes the variable-frequency heating to heating series loop.The present invention controls variable-frequency heating in real time, and save electric energy, control effects is good.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the structured flowchart of a kind of Novel variable-frequency heating system of the present invention.
Fig. 2 is the circuit theory diagrams of PWM control unit of the present invention.
Fig. 3 is the circuit theory diagrams of current sampling unit of the present invention.
In figure: 1 is microprocessor, 2 is power switch pipe, and 3 is heater, and 4 is rectification filtering unit, and 5 is temperature sensor, and 6 is current sampling unit, and 7 is A/D converter, and 8 is PWM control unit
Embodiment
As shown in Figure 1, a kind of Novel variable-frequency heating system of the present invention comprises heater 3 and microprocessor 1, also comprise rectification filtering unit 4, described rectification filtering unit 4 input is connected with AC power, is heated like this by rectification filtering unit 4 by after AC power rectification to heater 3.Described rectification filtering unit 4 forms series loop by power switch pipe 2 and heater 3, current sampling resistor R8 is provided with in described series loop, described current sampling resistor R8 is connected with microprocessor 1 by current sampling unit 6, and described microprocessor 1 is connected with power switch pipe 2 by PWM control unit 8.The present invention is by the electric current in current sampling unit collection heating series loop, and then microprocessor exports PWM ripple to PWM control unit adjustment PWM wave form output to power switch pipe, thus realizes the variable-frequency heating to heating series loop.
In order to better control PWM waveform, described heater 3 is provided with temperature sensor 5, and described temperature sensor is connected with microprocessor 1 by A/D converter 7.
As shown in Figure 2, the PWM control unit 8 of present embodiment comprises metal-oxide-semiconductor J1, and the drain electrode of described metal-oxide-semiconductor J1 is by resistance R7 ground connection, and the source electrode of described metal-oxide-semiconductor J1 is connected with power switch pipe; Diode D1 and resistance R4 is parallel with between the grid of described metal-oxide-semiconductor J1 and source electrode; The grid of described metal-oxide-semiconductor J1 is connected with the collector electrode of triode Q1 by resistance R5, the grounded emitter of described triode Q1, the base stage of described triode Q1 is connected with triode Q2 emitter, be connected with diode D2 between described triode Q2 base stage and emitter, the base stage of described triode Q2 is connected with microprocessor by resistance R6.
In order to better realize PWM Waveform Control, sampling unit is connected with between described microprocessor 1 and power switch pipe 2, described sampling unit comprises series resistance R1 and R2, the described resistance R1 other end is connected with microprocessor, the described resistance R2 other end is connected with power switch pipe, and the intermediate connection point of described resistance R1 and resistance R2 is by resistance R3 ground connection.Be transferred to microprocessor 1 by the output waveform of sampling unit collection power switch pipe 2 like this, microprocessor 1 adjusts accordingly, and guarantees that the output waveform of power switch pipe 2 is required frequency conversion adjustment waveform
As shown in Figure 3, described current sampling unit comprises rectification circuit, filter circuit, bleeder circuit and the amplifying circuit of connecting successively.Described rectification circuit is the full bridge rectifier that diode D3, D4, D5 and D6 are formed, described filter circuit is C4, described bleeder circuit is the series connection bleeder circuit of resistance R9 and R10, described amplifying circuit is amplifier U1, the intermediate connection point of described resistance R9 with R10 is connected with amplifier U1 electrode input end by resistance R11, described amplifier U1 negative input is by resistance R12 ground connection, and described amplifier U1 output is connected with microprocessor.
Although the foregoing describe the specific embodiment of the present invention; but those skilled in the art are to be understood that; these only illustrate; various changes or modifications can be made to present embodiment; and not deviating from principle and the essence of invention, protection scope of the present invention is only defined by the appended claims.
Claims (6)
1. a Novel variable-frequency heating system, comprise heater and microprocessor, it is characterized in that: also comprise rectification filtering unit, described rectification filtering unit input is connected with AC power, described rectification filtering unit forms series loop by power switch pipe and heater, be provided with current sampling resistor in described series loop, described current sampling resistor is connected with microprocessor by current sampling unit, and described microprocessor is connected with power switch pipe by PWM control unit.
2., according to a kind of Novel variable-frequency heating system according to claim 1, it is characterized in that: described heater is provided with temperature sensor, described temperature sensor is connected with microprocessor by A/D converter.
3. according to a kind of Novel variable-frequency heating system according to claim 1, it is characterized in that: described PWM control unit comprises metal-oxide-semiconductor J1, the drain electrode of described metal-oxide-semiconductor J1 is by resistance R7 ground connection, and the source electrode of described metal-oxide-semiconductor J1 is connected with power switch pipe; Diode D1 and resistance R4 is parallel with between the grid of described metal-oxide-semiconductor J1 and source electrode; The grid of described metal-oxide-semiconductor J1 is connected with the collector electrode of triode Q 1 by resistance R5, the grounded emitter of described triode Q1, the base stage of described triode Q1 is connected with triode Q2 emitter, be connected with diode D2 between described triode Q2 base stage and emitter, the base stage of described triode Q2 is connected with microprocessor by resistance R6.
4. according to a kind of Novel variable-frequency heating system according to claim 3, it is characterized in that: between described microprocessor and power switch pipe, be connected with sampling unit, described sampling unit comprises series resistance R1 and R2, the described resistance R1 other end is connected with microprocessor, the described resistance R2 other end is connected with power switch pipe, and the intermediate connection point of described resistance R1 and resistance R2 is by resistance R3 ground connection.
5. according to a kind of Novel variable-frequency heating system according to claim 1, it is characterized in that: described current sampling unit comprises rectification circuit, filter circuit, bleeder circuit and the amplifying circuit of connecting successively.
6. according to a kind of Novel variable-frequency heating system according to claim 5, it is characterized in that: described rectification circuit is the full bridge rectifier that diode D3, D4, D5 and D6 are formed, described filter circuit is C4, described bleeder circuit is the series connection bleeder circuit of resistance R9 and R10, described amplifying circuit is amplifier U1, the intermediate connection point of described resistance R9 with R10 is connected with amplifier U1 electrode input end by resistance R11, described amplifier U1 negative input is by resistance R12 ground connection, and described amplifier U1 output is connected with microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510239662.9A CN104902601B (en) | 2015-05-12 | 2015-05-12 | A kind of Novel variable-frequency heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510239662.9A CN104902601B (en) | 2015-05-12 | 2015-05-12 | A kind of Novel variable-frequency heating system |
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| Publication Number | Publication Date |
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| CN104902601A true CN104902601A (en) | 2015-09-09 |
| CN104902601B CN104902601B (en) | 2016-11-23 |
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| CN201510239662.9A Expired - Fee Related CN104902601B (en) | 2015-05-12 | 2015-05-12 | A kind of Novel variable-frequency heating system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105307293A (en) * | 2015-11-25 | 2016-02-03 | 王志成 | Electric cooker heating circuit powered by 220V AC voltage |
| CN105323875A (en) * | 2015-11-25 | 2016-02-10 | 王志成 | 12V-24V direct current voltage-powered electric cooker heating circuit |
| CN108548893A (en) * | 2018-03-12 | 2018-09-18 | 宁波安创电子科技有限公司 | A kind of nitrogen oxide sensor variable-frequency heating method |
| CN108925040A (en) * | 2018-08-06 | 2018-11-30 | 芜湖莫森泰克汽车科技股份有限公司 | A kind of PCB circuit board structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008135321A (en) * | 2006-11-29 | 2008-06-12 | Matsushita Electric Ind Co Ltd | Induction heating device |
| CN201841654U (en) * | 2010-08-20 | 2011-05-25 | 雷中喜 | Electricity-saving appliance of electromagnetic induction heating and injection molding device |
| CN104359752A (en) * | 2014-12-03 | 2015-02-18 | 北京东航科仪仪器有限公司 | Electric heating digestion instrument |
| CN204244499U (en) * | 2014-12-19 | 2015-04-01 | 邢台竹源电子科技有限公司 | Invariable power varible-frequency electromagnetic heater |
-
2015
- 2015-05-12 CN CN201510239662.9A patent/CN104902601B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008135321A (en) * | 2006-11-29 | 2008-06-12 | Matsushita Electric Ind Co Ltd | Induction heating device |
| CN201841654U (en) * | 2010-08-20 | 2011-05-25 | 雷中喜 | Electricity-saving appliance of electromagnetic induction heating and injection molding device |
| CN104359752A (en) * | 2014-12-03 | 2015-02-18 | 北京东航科仪仪器有限公司 | Electric heating digestion instrument |
| CN204244499U (en) * | 2014-12-19 | 2015-04-01 | 邢台竹源电子科技有限公司 | Invariable power varible-frequency electromagnetic heater |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105307293A (en) * | 2015-11-25 | 2016-02-03 | 王志成 | Electric cooker heating circuit powered by 220V AC voltage |
| CN105323875A (en) * | 2015-11-25 | 2016-02-10 | 王志成 | 12V-24V direct current voltage-powered electric cooker heating circuit |
| CN105323875B (en) * | 2015-11-25 | 2018-01-30 | 王志成 | The electric rice cooker heated circuit of 12V~24V DC-voltage supplies |
| CN105307293B (en) * | 2015-11-25 | 2018-01-30 | 王志成 | The electric rice cooker heated circuit of 220V AC voltage power supply |
| CN108548893A (en) * | 2018-03-12 | 2018-09-18 | 宁波安创电子科技有限公司 | A kind of nitrogen oxide sensor variable-frequency heating method |
| CN108925040A (en) * | 2018-08-06 | 2018-11-30 | 芜湖莫森泰克汽车科技股份有限公司 | A kind of PCB circuit board structure |
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| Publication number | Publication date |
|---|---|
| CN104902601B (en) | 2016-11-23 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Nie Qi Inventor after: Zou Jianbin Inventor after: Sun Ganlin Inventor after: Zou Yanhui Inventor after: Li Hui Inventor after: Nie Xiaofei Inventor before: Liu Jinding |
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Effective date of registration: 20160909 Address after: No. 19 Jinchuan road 331399 Ji'an city of Jiangxi Province in Xingan County Applicant after: State Grid Electric Power Company of Jiangxi province Xingan County power supply company Applicant after: State Grid Corporation of China Applicant after: GANXI POWER SUPPLY BRANCH, STATE GRID JIANGXI ELECTRIC POWER CO., LTD. Address before: 410000 Hunan Province, Changsha high tech Development Zone, No. 39 pointed Road, software park headquarters building A598 Applicant before: Changsha Jin Ding Information Technology Co., Ltd |
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| CF01 | Termination of patent right due to non-payment of annual fee |