CN102938948A - Constant-voltage precisely-controlled induction heating equipment - Google Patents
Constant-voltage precisely-controlled induction heating equipment Download PDFInfo
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- CN102938948A CN102938948A CN2012104836719A CN201210483671A CN102938948A CN 102938948 A CN102938948 A CN 102938948A CN 2012104836719 A CN2012104836719 A CN 2012104836719A CN 201210483671 A CN201210483671 A CN 201210483671A CN 102938948 A CN102938948 A CN 102938948A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 30
- 230000006698 induction Effects 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
The invention relates to constant-voltage precisely-controlled induction heating equipment belonging to the field of metal heating. According to the constant-voltage precisely-controlled induction heating equipment, an external power supply is connected with an inductor through a constant-voltage module and a frequency-regulating constant-current main control panel. According to the invention, the constant voltage and the constant current are adopted, and meanwhile, the output power is controlled, thereby ensuring constant output power, stable heating effect and precise heating quality, and effectively solving the defect that the heating temperature control stability is poor due to the fact that the output power of the traditional induction heating equipment is unstable.
Description
Technical field
The present invention relates to a kind of constant voltage essence control type induction heating equipment, belong to the METAL HEATING PROCESS field.
Background technology
High-power induction heating equipment is widely used in various METAL HEATING PROCESS field, has heating soon, the efficient advantages of higher.The mode of its common power ratio control is the adjusting direct voltage, one of regulating frequency or regulating impulse width, and the power ratio control mode is single, at voltage ripple of power network, the impact of the extraneous factors such as the fluctuation of load is lower, and power output very easily changes, and directly affects heating effect.Along with the raising of its application for constant product quality, accuracy, the user is more and more stronger for high accuracy induction heating equipment demand.
Summary of the invention
According to the deficiency in the above technology, the present invention will provide a kind of constant voltage essence control type induction heating equipment that guarantees stable output power.
Constant voltage essence control type induction heating equipment provided by the invention makes external power source pass through the constant voltage module and is connected inductor with frequency modulation constant current master control borad.
Wherein the constant voltage module connects inversion circuit, and inversion circuit connects inductor by resonant tank.
Inversion circuit connects the IGBT drive plate, and the IGBT drive plate connects frequency modulation constant current master control borad, and resonant tank connects frequency modulation constant current master control borad by current feedback circuit.
Frequency modulation constant current master control borad comprises phase-locked loop circuit and constant flow module, and phase-locked loop circuit connects the IGBT drive plate by the magnetic tank, and constant flow module connects resonant tank by magnet ring.
Frequency modulation constant current master control borad connects the protection transducer, and the protection transducer comprises temperature sensor, voltage sensor and liquid level sensor, and the protection transducer connects phase-locked loop circuit.
Phase-locked loop circuit is preferentially selected the CD4046 circuit.
Inversion circuit is preferentially selected H bridge inversion circuit.
The beneficial effect that the present invention has is, adopts constant voltage, and power output is controlled in constant current simultaneously, guaranteed that power output is constant, heating effect is stable, and heating quality is accurate, effectively solve traditional induction heating equipment unstable because of power output, caused the shortcoming of heating and temperature control poor stability.
Description of drawings
Fig. 1 is electrical schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described further:
Constant voltage essence control type induction heating equipment as shown in Figure 1 makes external power source pass through the constant voltage module and is connected inductor with frequency modulation constant current master control borad.Wherein the constant voltage module connects inversion circuit, and inversion circuit connects inductor by resonant tank, and inversion circuit is preferentially selected H bridge inversion circuit.Inversion circuit connects the IGBT drive plate, and the IGBT drive plate connects frequency modulation constant current master control borad, and resonant tank connects frequency modulation constant current master control borad by current feedback circuit.Frequency modulation constant current master control borad comprises phase-locked loop circuit and constant flow module, and phase-locked loop circuit connects the IGBT drive plate by the magnetic tank, and constant flow module connects resonant tank by magnet ring.Frequency modulation constant current master control borad connects the protection transducer, and the protection transducer comprises temperature sensor, voltage sensor and liquid level sensor, and the protection transducer connects phase-locked loop circuit.Phase-locked loop circuit is preferentially selected the CD4046 circuit.。
After connecting three phase mains, the constant voltage module starts, and waits the voltage of dc voltage stability being set after the inversion circuit work.When pressing heater switch, or timer is when beginning timing and needing induction coil to heat, deliver to frequency modulation constant current master control board starting signal, scanning circuit begins to send swept-frequency signal by high frequency toward low frequency among the CD4046, and be coupled out 4 tunnel identical signals of mutual isolation by the magnetic tank, and deliver to the IGBT drive plate, have two-way anti-phase this moment, and carry out power amplification through the IGBT drive plate, drive IGBT.Inversion circuit series resonant tank starting oscillation, because frequency scans from high to lower, so oscillating current progressively strengthens, simultaneously, by magnet ring sampling feedback, detect current amplitude, 9 pin voltages of control cd4046 circuit, feed back to 14 pin of cd4046 circuit after the feedback signal shaping, the phase place of lock current.When electric current reached preset value, scanning circuit quit work, and complete machine enters normal operating conditions.The cd4046 inside circuit has voltage controlled oscillator, thus change the frequency that 9 pin of cd4046 circuit just can change the output square wave, thus change the switching frequency of IGBT, reach the purpose of control electric current.
Auxiliary protective circuit effect is closing device timely when machine intimate or some parameters of outside change; reach the purpose of protection equipment; by liquid level sensor, temperature sensor and voltage sensor; accomplish timely excessive low water level protection and overtemperature prote, prevent that the supply of device interior cooling water is unusual.Open-phase protection and overvoltage protection prevent three-phase input AC electrical anomaly.Overcurrent protection prevents the IGBT operation irregularity.
Claims (7)
1. a constant voltage essence control type induction heating equipment is characterized in that, external power source is connected inductor by the constant voltage module with frequency modulation constant current master control borad.
2. constant voltage essence control type induction heating equipment according to claim 1 is characterized in that, described constant voltage module connects inversion circuit, and inversion circuit connects inductor by resonant tank.
3. constant voltage essence control type induction heating equipment according to claim 2 is characterized in that, described inversion circuit connects the IGBT drive plate, and the IGBT drive plate connects frequency modulation constant current master control borad, and resonant tank connects frequency modulation constant current master control borad by current feedback circuit.
4. according to claim 1 or 3 described constant voltages essence control type induction heating equipments, it is characterized in that, described frequency modulation constant current master control borad comprises phase-locked loop circuit and constant flow module, and phase-locked loop circuit connects the IGBT drive plate by the magnetic tank, and constant flow module connects resonant tank by magnet ring.
5. according to claim 1 or 3 described constant voltages essence control type induction heating equipments; it is characterized in that; described frequency modulation constant current master control borad connects the protection transducer, and the protection transducer comprises temperature sensor, voltage sensor and liquid level sensor, and the protection transducer connects phase-locked loop circuit.
6. constant voltage essence control type induction heating equipment according to claim 4 is characterized in that, described phase-locked loop circuit is the CD4046 circuit.
7. constant voltage essence control type induction heating equipment according to claim 2 is characterized in that, described inversion circuit is H bridge inversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104836719A CN102938948A (en) | 2012-11-25 | 2012-11-25 | Constant-voltage precisely-controlled induction heating equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104836719A CN102938948A (en) | 2012-11-25 | 2012-11-25 | Constant-voltage precisely-controlled induction heating equipment |
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| CN102938948A true CN102938948A (en) | 2013-02-20 |
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| CN2012104836719A Pending CN102938948A (en) | 2012-11-25 | 2012-11-25 | Constant-voltage precisely-controlled induction heating equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578821A (en) * | 2015-01-29 | 2015-04-29 | 深圳市禾望电气股份有限公司 | Method and device for adjusting switch frequency of wind power converter |
| CN109379795A (en) * | 2018-11-29 | 2019-02-22 | 洛阳升华感应加热股份有限公司 | The reverse frequency of induction heating power tracks locking phase control system |
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| JPH0467592A (en) * | 1990-07-06 | 1992-03-03 | Olympus Optical Co Ltd | High-frequency induction-heating device for high-melting point casting material |
| CN2195175Y (en) * | 1994-06-04 | 1995-04-19 | 王昆生 | Switch type frequency-change induction heating apparatus |
| CN2234328Y (en) * | 1996-01-17 | 1996-09-04 | 新都县科智微机应用研究所 | High-frequency induction heating welding machine |
| CN1842229A (en) * | 2005-03-31 | 2006-10-04 | 张希民 | Superaudio FM AM half bridge series resonance output electromagnetic induction heating power supply |
| JP2006278097A (en) * | 2005-03-29 | 2006-10-12 | Mitsui Eng & Shipbuild Co Ltd | Induction heating method and device |
| CN201590181U (en) * | 2009-09-14 | 2010-09-22 | 清华大学 | Self-adapting controllable constant-temperature heat source |
| JP2012221827A (en) * | 2011-04-12 | 2012-11-12 | Fuji Denki Thermosystems Kk | Induction heating power source device |
| CN202958010U (en) * | 2012-11-25 | 2013-05-29 | 王怀义 | Constant-pressure fine-controlled type induction heating device |
-
2012
- 2012-11-25 CN CN2012104836719A patent/CN102938948A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0467592A (en) * | 1990-07-06 | 1992-03-03 | Olympus Optical Co Ltd | High-frequency induction-heating device for high-melting point casting material |
| CN2195175Y (en) * | 1994-06-04 | 1995-04-19 | 王昆生 | Switch type frequency-change induction heating apparatus |
| CN2234328Y (en) * | 1996-01-17 | 1996-09-04 | 新都县科智微机应用研究所 | High-frequency induction heating welding machine |
| JP2006278097A (en) * | 2005-03-29 | 2006-10-12 | Mitsui Eng & Shipbuild Co Ltd | Induction heating method and device |
| CN1842229A (en) * | 2005-03-31 | 2006-10-04 | 张希民 | Superaudio FM AM half bridge series resonance output electromagnetic induction heating power supply |
| CN201590181U (en) * | 2009-09-14 | 2010-09-22 | 清华大学 | Self-adapting controllable constant-temperature heat source |
| JP2012221827A (en) * | 2011-04-12 | 2012-11-12 | Fuji Denki Thermosystems Kk | Induction heating power source device |
| CN202958010U (en) * | 2012-11-25 | 2013-05-29 | 王怀义 | Constant-pressure fine-controlled type induction heating device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578821A (en) * | 2015-01-29 | 2015-04-29 | 深圳市禾望电气股份有限公司 | Method and device for adjusting switch frequency of wind power converter |
| CN109379795A (en) * | 2018-11-29 | 2019-02-22 | 洛阳升华感应加热股份有限公司 | The reverse frequency of induction heating power tracks locking phase control system |
| CN109379795B (en) * | 2018-11-29 | 2021-08-10 | 洛阳升华感应加热股份有限公司 | Inversion frequency tracking phase-locking control system of induction heating power supply |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| ASS | Succession or assignment of patent right |
Owner name: LI LEI Effective date: 20130222 Owner name: WANG HUAIYI Free format text: FORMER OWNER: ZIBO LINZI GALAXY HIGH TECHNOLOGY DEVELOPMENT CO., LTD. Effective date: 20130222 |
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| C10 | Entry into substantive examination | ||
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| TA01 | Transfer of patent application right |
Effective date of registration: 20130222 Address after: 255400 No. 432, Linzi Avenue, Linzi District, Shandong, Zibo Applicant after: Wang Huaiyi Applicant after: Li Lei Address before: 255400 No. 432, Linzi Avenue, Linzi District, Shandong, Zibo Applicant before: Zibo Linzi Yinhe High-tech Development Co., Ltd. |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130220 |