CN204244499U - Invariable power varible-frequency electromagnetic heater - Google Patents
Invariable power varible-frequency electromagnetic heater Download PDFInfo
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- CN204244499U CN204244499U CN201420811728.8U CN201420811728U CN204244499U CN 204244499 U CN204244499 U CN 204244499U CN 201420811728 U CN201420811728 U CN 201420811728U CN 204244499 U CN204244499 U CN 204244499U
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Abstract
The utility model relates to a kind of invariable power varible-frequency electromagnetic heater.Its objective is to provide the varible-frequency electromagnetic heater that a kind of structure is simple, power invariability, heating effect are good.The utility model comprises three phase rectifier bridge circuit, filter capacitor, PWM pulsewidth circuit for regulating and controlling, IGBT module, loading coil and central processing unit.The ac input end of three phase rectifier bridge circuit is connected with power interface respectively with the power port of central processing unit, the DC output end of three phase rectifier bridge circuit is connected with the input of IGBT module, between three phase rectifier bridge circuit and IGBT module, be provided with filter capacitor, the output of IGBT module is connected with loading coil.IGBT module is provided with LC resonant circuit, RC absorbing circuit, IGBT testing circuit and IGBT drive circuit, the signal end of IGBT testing circuit is connected with the FPDP of central processing unit, the control end of IGBT drive circuit is connected with the output of PWM pulsewidth circuit for regulating and controlling, and the signal receiving end of PWM pulsewidth circuit for regulating and controlling is connected with the control port of central processing unit.
Description
Technical field
The utility model relates to a kind of industrial heating device, particularly relates to a kind of invariable power varible-frequency electromagnetic heater.
Background technology
On current market, most of firing equipment is all adopt resistance-type heating collar to be heated by heat conducting mode, this mode of heating not only wastes a large amount of heats, and easily cause device outer surface temperature too high, destroy production environment, thus human body is worked the mischief.And existing varible-frequency electromagnetic heater, the hardware of control section and structural allocation are very simple, and the change of load temperature is easy to the change causing parameters, and temperature peak load electric current increases, and finally cause the damage of IGBT module.On the other hand, IGBT module in existing varible-frequency electromagnetic heater has the appearance of pulse spike and multiple harmonic in the course of the work, voltage and current is very unstable, thus add the consumption of high-frequency current, the real output of varible-frequency electromagnetic heater is made to be significantly less than rated power, not only waste energy consumption, and usually cause varible-frequency electromagnetic heater to heat up difficulty, this problem of falling power has become the present stage variable-frequency electromagnetic heating art a great problem that will overcome.
Utility model content
The technical problems to be solved in the utility model is to provide that a kind of structure is simple, power invariability, heating effect are good, the invariable power varible-frequency electromagnetic heater of long service life.
The utility model invariable power varible-frequency electromagnetic heater, wherein: comprise three phase rectifier bridge circuit, filter capacitor, PWM pulsewidth circuit for regulating and controlling, IGBT module, loading coil and central processing unit, the ac input end of three phase rectifier bridge circuit is connected with power interface respectively with the power port of central processing unit, the DC output end of three phase rectifier bridge circuit is connected with the input of IGBT module, filter capacitor is provided with between three phase rectifier bridge circuit and IGBT module, the output of IGBT module is connected with loading coil, loading coil place is provided with ferrimagnet, IGBT module is provided with LC resonant circuit, RC absorbing circuit, IGBT testing circuit and IGBT drive circuit, the signal end of IGBT testing circuit is connected with the FPDP of central processing unit, the control end of IGBT drive circuit is connected with the output of PWM pulsewidth circuit for regulating and controlling, the signal receiving end of PWM pulsewidth circuit for regulating and controlling is connected with the control port of central processing unit.
The utility model invariable power varible-frequency electromagnetic heater, wherein said power interface is also connected with the power port of fan, and fan is provided with fan drive circuit, and the signal end of fan drive circuit is connected with the control port of central processing unit.
The utility model invariable power varible-frequency electromagnetic heater, the quantity of wherein said filter capacitor is two.
The utility model invariable power varible-frequency electromagnetic heater, wherein said central processing unit is CPU processor.
The utility model invariable power varible-frequency electromagnetic heater difference from prior art is: the utility model structure is simple, power invariability, heating effect are good, long service life.By three phase rectifier bridge circuit, rectification is carried out to alternating current, and carry out filtering by filter capacitor, except the ripple component in removing DC.When direct current is by IGBT module, LC resonant circuit and RC absorbing circuit can unnecessary harmonic wave and clutters in Absorption Current, make high-frequency current more steady, reduce the unnecessary consumption of electric energy.Detected by the voltage and current of IGBT testing circuit to IGBT module, and regulated by the voltage of PWM pulsewidth circuit for regulating and controlling to IGBT drive circuit, thus ensure that the power output of IGBT module is invariable, effectively solve the problem of falling power in common varible-frequency electromagnetic heater.In addition, when each circuit carries out work for a long time, also control fan by central processing unit and radiating and cooling is carried out to each circuit, improve the operating efficiency of each circuit, extend the useful life of inner each parts.
Below in conjunction with accompanying drawing, the utility model invariable power varible-frequency electromagnetic heater is described further.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the utility model invariable power varible-frequency electromagnetic heater.
Embodiment
As shown in Figure 1, be the circuit structure diagram of the utility model invariable power varible-frequency electromagnetic heater, comprise three phase rectifier bridge circuit 1, filter capacitor 2, PWM pulsewidth circuit for regulating and controlling 3, IGBT module 4, loading coil 10 and central processing unit 9.The ac input end of three phase rectifier bridge circuit 1, the power port of central processing unit 9 are connected with power interface 13 respectively with the power port of fan 12, the DC output end of three phase rectifier bridge circuit 1 is connected with the input of IGBT module 4, filter capacitor 2 is provided with between three phase rectifier bridge circuit 1 and IGBT module 4, the quantity of filter capacitor 2 is two, the Rectified alternating current that filter capacitor 2 pairs of three phase rectifier bridge circuits 1 export carries out filtering, makes it become the direct current of pulse free composition.The output of IGBT module 4 is connected with loading coil 10, and loading coil 10 place is provided with ferrimagnet.IGBT module 4 is provided with LC resonant circuit 5 and RC absorbing circuit 6, LC resonant circuit 5 and removes harmonic wave in electric current and clutter, make electric current more steady, reduce the loss of IGBT module 4; RC absorbing circuit 6 removes spike in electric current and multiple harmonic, the climbing of deboost, prevents voltage to skyrocket the appearance of phenomenon, IGBT module 4 is played to the effect of protection.IGBT module 4 is also provided with IGBT testing circuit 7 and IGBT drive circuit 8, the signal end of IGBT testing circuit 7 is connected with the FPDP of central processing unit 9, the control end of IGBT drive circuit 8 is connected with the output of PWM pulsewidth circuit for regulating and controlling 3, and the signal receiving end of PWM pulsewidth circuit for regulating and controlling 3 is connected with the control port of central processing unit 9.Electric current and the voltage of IGBT testing circuit 7 pairs of IGBT module 4 detect, and data are returned to central processing unit 9, prevent IGBT module 4 from overcurrent and superpotential phenomenon occurring; IGBT drive circuit 8 drives IGBT module 4 to carry out work according to the control signal of central processing unit 9, PWM pulsewidth circuit for regulating and controlling 3 changes according to the signal of central processing unit 9 output voltage that pulse duration controls IGBT drive circuit 8, and controlled the output frequency of IGBT drive circuit 8 by the change cycle, thus control voltage and the output frequency of IGBT module 4.The control port of central processing unit 9 is also connected with the signal end of fan drive circuit 11, fan drive circuit 11 is arranged on fan 12, fan drive circuit 11 carries out work according to the control signal drive fan 12 of central processing unit 9, plays as each device work carries out the effect of lowering the temperature.
Central processing unit 9 in an embodiment of the present utility model is CPU processor.
The course of work of the present utility model is: at power interface 13 incoming transport power supply, alternating current carries out rectification through three phase rectifier bridge circuit 1, enter filter capacitor 2 from the Rectified alternating current of three phase rectifier bridge circuit 1 output and carry out filtering, filter capacitor 2 removes the ripple component in Rectified alternating current, makes it become pure direct current.The direct current of electric capacity 2 enters into IGBT module 4 after filtering, and the LC resonant circuit 5 in IGBT module 4 and RC absorbing circuit 6 process direct current respectively.LC resonant circuit 5 removes harmonic wave in electric current and clutter, makes electric current more steady, reduces the loss of IGBT module 4; RC absorbing circuit 6 removes spike in electric current and multiple harmonic, the climbing of deboost, prevents voltage to skyrocket the appearance of phenomenon, protection IGBT module 4 trouble free service.Electric current and the voltage of IGBT testing circuit 7 pairs of IGBT module 4 that IGBT module 4 is installed detect in real time, and transfer data to central processing unit 9.The IGBT drive circuit 8 that IGBT module 4 is installed controls IGBT module 4 according to the drive singal of central processing unit 9 and carries out work, PWM pulsewidth circuit for regulating and controlling 3 is provided with between central processing unit 9 and IGBT module 4, signal is passed to PWM pulsewidth circuit for regulating and controlling 3 after analyzing by central processing unit 9 pairs of signals, PWM pulsewidth circuit for regulating and controlling 3 controls the output voltage of IGBT drive circuit 8 by changing pulse duration, and the output frequency of IGBT drive circuit 8 is controlled by the change cycle, thus control voltage and the output frequency of IGBT module 4, ensure that the power output of IGBT module 4 is constant.The high-frequency current that IGBT module 4 exports flow in loading coil 10, loading coil 10 is made to produce alternating magnetic field, alternating magnetic field runs into ferrimagnet cutting magnetic line and produces a lot of eddy current, externally exported by ferrimagnet at ferrimagnet generate heat inside.When each circuit works long hours, send drive singal by central processing unit 9 to fan drive circuit 11, fan drive circuit 11 drive fan 12 carries out work, lowers the temperature to each circuit.
The utility model invariable power varible-frequency electromagnetic heater, carries out rectification by three phase rectifier bridge circuit 1 pair of alternating current, and carries out filtering, except the ripple component in removing DC by filter capacitor 2.When direct current is by IGBT module 4, LC resonant circuit 5 and RC absorbing circuit 6 can unnecessary harmonic wave and clutters in Absorption Current, make high-frequency current more steady, reduce the unnecessary consumption of electric energy.Detected by the voltage and current of IGBT testing circuit 7 pairs of IGBT module 4, and regulated by the voltage of PWM pulsewidth circuit for regulating and controlling 3 pairs of IGBT drive circuit 8, thus ensure that the power output of IGBT module 4 is invariable, effectively solve the problem of falling power in common varible-frequency electromagnetic heater.In addition, when each circuit carries out work for a long time, also control fan 12 by central processing unit 9 and radiating and cooling is carried out to each circuit, improve the operating efficiency of each circuit, extend the useful life of inner each parts.The utility model structure is simple, power invariability, heating effect are good, long service life, compared with prior art has obvious advantage.
Above-described embodiment is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection range that the utility model claims determine.
Claims (4)
1. an invariable power varible-frequency electromagnetic heater, it is characterized in that: comprise three phase rectifier bridge circuit (1), filter capacitor (2), PWM pulsewidth circuit for regulating and controlling (3), IGBT module (4), loading coil (10) and central processing unit (9), the ac input end of three phase rectifier bridge circuit (1) is connected with power interface (13) respectively with the power port of central processing unit (9), the DC output end of three phase rectifier bridge circuit (1) is connected with the input of IGBT module (4), filter capacitor (2) is provided with between three phase rectifier bridge circuit (1) and IGBT module (4), the output of IGBT module (4) is connected with loading coil (10), loading coil (10) place is provided with ferrimagnet, IGBT module (4) is provided with LC resonant circuit (5), RC absorbing circuit (6), IGBT testing circuit (7) and IGBT drive circuit (8), the signal end of IGBT testing circuit (7) is connected with the FPDP of central processing unit (9), the control end of IGBT drive circuit (8) is connected with the output of PWM pulsewidth circuit for regulating and controlling (3), the signal receiving end of PWM pulsewidth circuit for regulating and controlling (3) is connected with the control port of central processing unit (9).
2. invariable power varible-frequency electromagnetic heater according to claim 1, it is characterized in that: described power interface (13) is also connected with the power port of fan (12), fan (12) is provided with fan drive circuit (11), the signal end of fan drive circuit (11) is connected with the control port of central processing unit (9).
3. invariable power varible-frequency electromagnetic heater according to claim 1, is characterized in that: the quantity of described filter capacitor (2) is two.
4. invariable power varible-frequency electromagnetic heater according to claim 1, is characterized in that: described central processing unit (9) is CPU processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420811728.8U CN204244499U (en) | 2014-12-19 | 2014-12-19 | Invariable power varible-frequency electromagnetic heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420811728.8U CN204244499U (en) | 2014-12-19 | 2014-12-19 | Invariable power varible-frequency electromagnetic heater |
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| Publication Number | Publication Date |
|---|---|
| CN204244499U true CN204244499U (en) | 2015-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420811728.8U Expired - Fee Related CN204244499U (en) | 2014-12-19 | 2014-12-19 | Invariable power varible-frequency electromagnetic heater |
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| CN (1) | CN204244499U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104797026A (en) * | 2015-04-23 | 2015-07-22 | 合肥顺昌电磁感应科技有限公司 | Movable electromagnetic induction excavating and unfreezing device |
| CN104902601A (en) * | 2015-05-12 | 2015-09-09 | 长沙金定信息技术有限公司 | Novel variable frequency heating system |
| CN106332340A (en) * | 2015-06-30 | 2017-01-11 | 深圳市泰金田科技有限公司 | Electromagnetic heating device and heating method thereof |
| CN106419478A (en) * | 2016-07-28 | 2017-02-22 | 刘万斌 | Multifunctional automatic electromagnetic stir-frying machine |
-
2014
- 2014-12-19 CN CN201420811728.8U patent/CN204244499U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104797026A (en) * | 2015-04-23 | 2015-07-22 | 合肥顺昌电磁感应科技有限公司 | Movable electromagnetic induction excavating and unfreezing device |
| CN104902601A (en) * | 2015-05-12 | 2015-09-09 | 长沙金定信息技术有限公司 | Novel variable frequency heating system |
| CN106332340A (en) * | 2015-06-30 | 2017-01-11 | 深圳市泰金田科技有限公司 | Electromagnetic heating device and heating method thereof |
| CN106332340B (en) * | 2015-06-30 | 2022-08-19 | 深圳市泰金田科技有限公司 | Electromagnetic heating device and heating method thereof |
| CN106419478A (en) * | 2016-07-28 | 2017-02-22 | 刘万斌 | Multifunctional automatic electromagnetic stir-frying machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150401 Termination date: 20161219 |