CN201204714Y - Induction heating apparatus - Google Patents
Induction heating apparatus Download PDFInfo
- Publication number
- CN201204714Y CN201204714Y CN 200820070814 CN200820070814U CN201204714Y CN 201204714 Y CN201204714 Y CN 201204714Y CN 200820070814 CN200820070814 CN 200820070814 CN 200820070814 U CN200820070814 U CN 200820070814U CN 201204714 Y CN201204714 Y CN 201204714Y
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- circuit
- induction heating
- inverter circuit
- output
- heating equipment
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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
Abstract
The utility model discloses an induction heating apparatus, comprising a three-phase full-bridge rectification circuit. The output terminal of the three-phase full-bridge rectification circuit is connected with the input terminal of an inverter circuit, and the output terminal of the inverter circuit is connected with a resonance circuit; the inverter circuit is connected with a pulse width modulator which is connected with a driving circuit; in the resonance circuit, the output transformer adopts a dry-type transformer so that the utility model has small volume, small weight, good reliability and greatly improves the transformer output power and efficiency. The utility model adopts imported Siemens double-pole type insulated gate transistor IGBT power switch device, implements frequency autotracking by utilizing control scheme combining self-adaptation control and optimal control; the utility model has advantages of small weight, small volume, low price, safety, environment protection and so on; the utility model has remarkable energy-saving effect comparing with the old type induction heating mode.
Description
Technical field
The utility model relates to the induction heating equipment in the industrial heat treatment industry, specifically relates to the high novel high-frequency induction heating equipment of a kind of electric energy.
Background technology
In mechanical processing industry, diathermanous moulding, surface heat are handled and soldering is to use production technology very widely.Early stage traditional handicraft adopts oxy-acetylene welding more, burns means such as coal, oil firing, burning gas or electric furnace heating.Production environment is abominable, and serious and workpiece oxidation bed thickness of environmental pollution and the low phenomenon of production efficiency are the weak points of this technology.In mid-term nineteen sixties, the appearance of electron tube intermediate frequency induction heating device has had bigger progress than prior heat treatment process.But because equipment volume is huge, the big efficient of energy consumption is low, is this class induction heating technique development of restriction and the main cause used to problems such as Disturbance in Power Net are serious when operating maintenance poor stability and low power factor operation.To later stage nineteen nineties, along with the formation of International Economic ﹠ Technology integrative development general layout, the development of applied science technology has presented the unprecedented flourishing age, and one of its notable attribute is that power electronic device and technology have had new breakthrough.What developed countries such as the U.S., Japan, Germany all once used the success of ambipolar gated transistor IGBT device for power switching develops the novel high-frequency induction heating equipment; compare with old equipment; this class new equipment has: energy consumption is low, efficient is high, in light weight, volume is little, the operating maintenance safe ready; operate power factor height; little to Disturbance in Power Net; the Power Regulation scope is big, and adaptability is strong, and information technology and Based Intelligent Control combine together and make advantages such as control protection electric circuit is simple and reliable.It is domestic that policies of reform and opening to the outside world have attracted numerous foreign traders that mechanical industry is transferred to, and forming pillar industry in some areas.For this reason, need a large amount of HF induction heating apparatus, yet the import equipment price is too high, supply falls short of demand for the HF induction heating apparatus that domestic minority enterprise produces.
Summary of the invention
The purpose of this utility model provides the high novel induction heating equipment of a kind of electric energy.
For achieving the above object, the utility model is by the following technical solutions:
The utility model comprises three-phase bridge rectification circuit, and the output of three-phase bridge rectification circuit is connected with the input of inverter circuit, and the output of inverter circuit is connected with resonant tank; Described inverter circuit is connected with pulse width modulator, and pulse width modulator links to each other with drive circuit, it is characterized in that: in described resonant tank, output transformer adopts dry-type transformer.
Above-mentioned resonant tank is a series resonant tank.
Above-mentioned resonant tank is the shunt-resonant circuit.
Above-mentioned inverter circuit comprises full bridge inverter.
Above-mentioned inverter circuit comprises half-bridge inversion circuit.
Above-mentioned three-phase bridge rectification circuit is connected with filter circuit, and filter circuit links to each other with power regulation circuit, and power regulation circuit is connected with inverter circuit.
Above-mentioned power regulation circuit mainly is made of high power transistor, and its collector electrode links to each other with the output of filter circuit, and emitter links to each other with the input of inverter circuit; And between collector electrode and emitter, be provided with diode.
At the input of three-phase bridge rectification circuit three cement resistors respectively in parallel.
Above-mentioned inverter circuit is to be made of four ambipolar gated transistors, and four ambipolar gated transistors all are placed on the water box that water is housed, and are provided with at least one transducer in the described water box; And scribble silicone grease on the described water box.
Above-mentioned pulse width modulator respectively with current foldback circuit, overheating protection circuit, owe the water conservation circuit and be connected with overvoltage crowbar.
Adopt the utility model of technique scheme, in resonant tank, output transformer adopts dry-type transformer, thereby it is little, in light weight to have a volume, can increase reliability, and the transformer power output is improved on a large scale, and efficient improves greatly.Adopt the ambipolar gated transistor IGBT of the original-pack Siemens of import device for power switching, the controlling schemes that combines with adaptive control and optimal control, realize automatic frequency tracking, make product have in light weight, volume is little, characteristics such as inexpensive, safety, environmental protection, compare with old-fashioned induction heating mode, energy-saving effect is very remarkable.In addition, the utlity model has Power Regulation function and impedance conversion setting, to adapt to different workpieces, different temperatures, the requirement of different capacity, and the optimum Match of realization load impedance; Have the automatic following function of wide range of frequencies, guarantee that when load variations the inversion resonant tank always works in resonance condition, thereby realized the high and purpose little of operate power factor Disturbance in Power Net; The utility model is provided with overvoltage, overcurrent, over-temperature protection and defencive function and warning functions such as lack of water, phase shortage, and simultaneously, the utility model is provided with heating, insulation and the cooling timing automatic control function to workpiece.In addition, the utility model is full-automatic type high-frequency heating apparatus, can realize full-automatic, semi-automatic and three functions of manual switch, and have three soft-touch type timing device and can finish regularly heating, regularly insulation, refrigerating function regularly, and can realize automatically circulating.Satisfy the requirement of the production automation, improved enterprise's production automation degree.
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is the theory diagram of embodiment 1 in the utility model;
Fig. 3 is the part of embodiment 1 circuit diagram in the utility model;
Fig. 4 is another part of embodiment 1 circuit diagram in the utility model;
Fig. 5 is the last part of embodiment 1 circuit diagram in the utility model;
Fig. 6 is the circuit theory diagrams of embodiment 2 in the utility model;
Fig. 7 is the circuit theory diagrams of embodiment 3 in the utility model;
Fig. 8 is the circuit theory diagrams of embodiment 4 in the utility model;
Fig. 9 is the circuit theory diagrams of embodiment 5 in the utility model.
Embodiment
As shown in Figure 1, the utility model comprises three-phase bridge rectification circuit, at the input of three-phase bridge rectification circuit three cement resistor R101 respectively in parallel, R201, R301.The output of three-phase bridge rectification circuit is connected with the input of filter circuit.The output of filter circuit is connected with the input of inverter circuit, and the output of inverter circuit is connected with series resonant tank, and in series resonant tank, output transformer adopts dry-type transformer.Above-mentioned inverter circuit is connected with pulse width modulator, and pulse width modulator links to each other with drive circuit.Above-mentioned pulse width modulator respectively with current foldback circuit, overheating protection circuit, owe the water conservation circuit and be connected with overvoltage crowbar.Above-mentioned inverter circuit is a full bridge inverter.
As Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, three-phase alternating-current supply is through fuse, and air switch is directly introduced three-phase bridge rectification circuit through A.C. contactor normally opened contact line voltage again.Because the utility model is large power-consuming equipment, for the excessive spy of moment impact electric current that prevents to start shooting at contactor place, three contacts and be connected to high-power three cement resistor R101, R201, R301 carries out precharge to filter capacitor.Three-phase bridge rectification circuit D101, D201, D301, D401, D501, the filter capacitor C201 of D601 and filter circuit, C301 convert the industrial-frequency alternating current of 380V/50HZ to the direct voltage of single-phase about 510V.Power supply advances acting as of filter circuit: the one, for preventing the interference signal on the electrical network this machine is disturbed; The 2nd, prevent the High-frequency Interference electrical network that this machine produces.Inverter circuit is by four ambipolar gated transistor IBGT pipe V101, V201, and V301, V401 constitutes, four ambipolar gated transistor V101, V201, V301, V401 all is placed on the water box that water is housed, and is provided with at least one transducer in the water box, and scribbles silicone grease on the water box.The direct voltage of 510V after direct current filters is added on two brachium pontis intersection points of the single-phase inversion full-bridge of being made up of 4 IGBT pipes, two intersection points in addition of brachium pontis seal on the inductance coil L101 and tank capacitance C101 of LC series resonant circuit, above-mentioned inductance coil L101 is the elementary of coupling output transformer, coupling the secondary of output transformer is heater coil L201, workpiece places in the heater coil L201, constitutes dry-type transformer thus.
Four ambipolar gated transistor V101 in the inverter circuit, V201, V301, V401 are divided into two groups, and V101 and V301 are one group, and V201 and V401 are another group.Inserting amplitude when between the grid emitter-base bandgap grading of two IGBT of every group of symmetry of full inverter bridge equates, behind the pulse signal of phase place complementation, 4 IGBT on the brachium pontis will divide two groups of conductings simultaneously-by-conducting ... producing oscillating voltage is added on the series resonance lc circuit, output is added in the heater coil two ends through the matching transformer step-down, workpiece is heated because of the eddy current that induced current produces, and caloric value can get according to joule-distracted time theorem:
Q＝I
2Rt
Q: conductor caloric value;
I: by the current strength of conductor;
R: heated parts resistance;
T: heating time.
Because the IGBT long-term work in conducting, ends, conducting ends ... repeatedly under Xun Huan the state, thus the shutoff surge voltage can be produced, both when the electric current that turn-offs the instantaneous IGBT of flowing through is cut off and the transient voltage that produces, the fragile IGBT of this voltage pole.So when design circuit at IGBT collector electrode and emitter two ends and be connected to buffer circuit.Above-mentioned buffer circuit is meant buffer capacitor C401 respectively in parallel on 4 IGBT, C501, C601, C701.Buffer circuit is used to solve the infringement of shutoff surge voltage to IGBT.Buffer circuit has following effect: reduce surge voltage and electric current that power device IGBT bears; Reduce the energy consumption of power device; Improve the overvoltage of device, conveyance capacity; Reduce dv/dt and di/dt, make it to be no more than the scope that device is allowed; The reverse recovery characteristic of softening fly-wheel diode reduces the harm that reverse recovery current causes.In addition, starting resistance R401, R501 are connected in parallel on the two ends of IGBT pipe V101 and V301 respectively, and starting resistance R401, R501 are in order to make V201 and V401 satisfy condition of work in the inversion process.
IGBT is a high power device; so its caloric value is quite big; when design circuit, considered control equally to the IGBT working temperature; adopt water-cooling pattern, IGBT is fixed on the water box that is connected with water, and scribble silicone grease and make its Homogeneouslly-radiating; and temperature sensor is housed simultaneously on the water box; when the IGBT working temperature surpasses 55 ℃, send temperature alarm, and stop machine works, IGBT has been played good protective action.Be provided with the hydraulic pressure sensing device, hydraulic pressure is defined in 0.15～0.2MPa scope, make water cooling more reasonable, operational environment is safer.
The utility model also is provided with current foldback circuit, overheating protection circuit, owes water conservation circuit and overvoltage crowbar.The overcurrent protection hall band is connected to 510V DC power supply anode, is mainly finished by discharge circuit A101.To send overcurrent and report to the police when operating current surpasses setting, and stop machine works, control operation this moment is all invalid, and machine has been played good protective action.Overheating protection circuit is mainly finished by A201; Owing the water conservation circuit is mainly finished by A301; Overvoltage crowbar is mainly finished by A401.Overheating protection circuit, owe water conservation circuit and overvoltage crowbar and all adopt advanced high-speed comparator to finish, and be technology well known to those of ordinary skill in the art.
As Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, above-mentioned pulse width modulator comprises integrated PWM controller SG3525, and it is connected with frequency tracking circuit with shaping amplification circuit.This IGBT drive signal is produced by the integrated PWM controller SG3525A that U.S. SG company produces, and finishes control impuls by operational amplifier A 501 etc. and forms, amplifies, transfer wide, the automatic frequency tracking of frequency of oscillation variation, the regulation and control of watt level.This pulse width modulator is regulated pulsewidth by feedback, directly compares with the signal and the error amplifier output signal that flow through the outputting inductance coil current at the input of pwm comparator, makes the inductance peak current tracking error change in voltage of output and changes.Thereby guaranteed the adjustment of pulse duty factor.When with the rising of temperature the natural frequency of the tank circuit being changed in the variation of workpiece dimension and the heating process, control circuit can be realized automatic frequency tracking, works under the resonance condition of the best all the time to guarantee circuit.
IGBT is the grid drive type power device, and drive circuit is had relatively high expectations.The amplitude of pulse control signal is selected 15V for use.Because turning on and off of IGBT is to realize by discharging and recharging of grid circuit, so the resistance value will produce influence greatly to the dynamic characteristic of IGBT.Select for use the less resistance value of numerical value to make discharging and recharging of grid capacitance very fast, thereby reduce switching time and switching loss, but meanwhile, it can only bear less grid noise, and cause grid-emitter capacity, stray inductance with the gate driving lead produces oscillation problem, so resistance is elected 4.1 Ω as through balance. reliably end in order to guarantee IGBT, low limit choosing-5V, straight-through for preventing 4 brachium pontis simultaneously in when vibration, except that requiring the two pulse signals strictly complementary and continue to employ certain dead voltage time.
Grid wiring must be reduced to the output stage of driver and the stray inductance between the IGBT minimumly because IGBT has relatively high expectations to gate driving, adopts twisted-pair feeder that the IGBT drive end is connected with the driving PCB plate.In order to make IGBT work safer, the coupling of the signal between master control borad and the drive plate has simultaneously also adopted the higher optical coupler of common-mode rejection ratio, is used to isolate the flash gate drive signal.
In order to make IGBT better work on off state, drive circuit is also had following specific (special) requirements: the climbing of gate drive voltage pulse and rate of descent want fully big; After power IGBT conducting, driving voltage and electric current that gate driver circuit offers IGBT will have enough amplitudes; Power IGBT is in turn off process, the reversed bias voltage that the grid emitter-base bandgap grading applies helps the quick shutoff of IGBT, but reverse biased is subjected to maximum withstand voltage restriction between the IGBT grid emitter-base bandgap grading, and excessive reverse voltage also can cause the reverse breakdown of IGBT grid emitter-base bandgap grading, so reverse voltage is elected as-5V; Line between drive circuit and the IGBT grid emitter will be lacked as far as possible, and adopts twisted-pair feeder to connect.
This circuit is by SG3525, and MOS digital module, operational amplifier etc. are finished control impuls and formed, amplify, transfer automatic frequency tracking wide, that frequency of oscillation changes, the automatic protection of the regulation and control of watt level and threat circuit safety.Device for power switching, matching transformer power, tank capacitances etc. are selected the corresponding devices parameter for use according to hunting power and frequency of oscillation.This acc power regulating circuit adopts the method that changes the control impuls width to realize that power adjustments is the PWM technology.
The basic mentality of designing of protective circuit be with protected object be divided into normally, two states transfinites; pass through comparator; transistor switching circuits etc. are transformed into two states the switching signal of low level, high level; to enter SG3525 the 10th pin with the gate logic relation; promptly protect pin; cut off the SG3525 pulse signal source, cut off main contactor coil and connection sound, optical alarm circuit simultaneously to reach the purpose of alarm and protection.This machine removes has overcurrent, and overheated, protections such as lack of water are protected measure and also had open-phase protection and overvoltage crowbar outward.The design philosophy of open-phase protection is: with three-phase voltage wherein two-phase be connected to a miniature transformer, and the monitoring output voltage, when voltage is undesired.Output open-phase protection signal.And another is used for the power supply of control transformer mutually, so lack any phase in the three-phase voltage, equipment all can not be worked, and sends alarm signal simultaneously.
As shown in Figure 6, the utility model comprises three-phase bridge rectification circuit, and the output of three-phase bridge rectification circuit is connected with the input of filter circuit.Filter circuit links to each other with power regulation circuit, and power regulation circuit is connected with inverter circuit.The output of inverter circuit is connected with series resonant tank, and in series resonant tank, output transformer adopts dry-type transformer.Above-mentioned inverter circuit is connected with pulse width modulator, and pulse width modulator links to each other with drive circuit.Above-mentioned pulse width modulator respectively with current foldback circuit, overheating protection circuit, owe the water conservation circuit and be connected with overvoltage crowbar.Above-mentioned inverter circuit is a full bridge inverter.
Above-mentioned power regulation circuit mainly is made of high power transistor V501, and its collector electrode links to each other with the output of filter circuit, and emitter links to each other with the input of inverter circuit; And between collector electrode and emitter, be provided with diode D701.
Other technical characterictic and four protective circuits are identical with embodiment 1.
As shown in Figure 7, the utility model comprises three-phase bridge rectification circuit, and the output of three-phase bridge rectification circuit is connected with the input of filter circuit.Filter circuit links to each other with power regulation circuit, and power regulation circuit is connected with inverter circuit.The output of inverter circuit is connected with the shunt-resonant circuit, and in the shunt-resonant circuit, output transformer adopts dry-type transformer.Above-mentioned inverter circuit is connected with pulse width modulator, and pulse width modulator links to each other with drive circuit.Above-mentioned pulse width modulator respectively with current foldback circuit, overheating protection circuit, owe the water conservation circuit and be connected with overvoltage crowbar.Above-mentioned inverter circuit is a full bridge inverter.
Above-mentioned power regulation circuit mainly is made of high power transistor V501, and its collector electrode links to each other with the output of filter circuit, and emitter links to each other with the input of inverter circuit; And between collector electrode and emitter, be provided with diode D701.
Other technical characterictic and four protective circuits are identical with embodiment 1.
As shown in Figure 8, the utility model comprises three-phase bridge rectification circuit, and the output of three-phase bridge rectification circuit is connected with the input of filter circuit.The output of filter circuit is connected with the input of inverter circuit, and the output of inverter circuit is connected with series resonant tank.In series resonant tank, output transformer adopts dry-type transformer.In addition, inverter circuit adopts half-bridge inversion circuit, and half-bridge inversion circuit is by two IGBT pipe V101, and V201 constitutes, V101, V201 alternately opens, thereby produces the high-frequency inversion electric current, high-frequency current produces magnetic field through induction coil L1, makes in workpiece heating wherein, reaches the purpose of induction heating.Above-mentioned inverter circuit is connected with pulse width modulator, and pulse width modulator links to each other with drive circuit.Above-mentioned pulse width modulator respectively with current foldback circuit, overheating protection circuit, owe the water conservation circuit and be connected with overvoltage crowbar.
Other technical characterictic and four protective circuits are identical with embodiment 1.
As shown in Figure 9, the utility model comprises three-phase bridge rectification circuit, and the output of three-phase bridge rectification circuit is connected with the input of filter circuit.The output of filter circuit is connected with the input of inverter circuit, and the output of inverter circuit is connected with series resonant tank.Inverter circuit adopts half-bridge inversion circuit, and half-bridge inversion circuit is by two IGBT pipe V101, and V201 constitutes, V101, V201 alternately opens, thereby produces the high-frequency inversion electric current, high-frequency current produces magnetic field through induction coil L101, makes in workpiece heating wherein, reaches the purpose of induction heating.In series resonant tank, output adopts induction coil L101 directly to export, and can reduce output transformer, has saved loss.Above-mentioned inverter circuit is connected with pulse width modulator, and pulse width modulator links to each other with drive circuit.Above-mentioned pulse width modulator respectively with current foldback circuit, overheating protection circuit, owe the water conservation circuit and be connected with overvoltage crowbar.
Other technical characterictic and four protective circuits are identical with embodiment 1.
Claims (10)
1, a kind of induction heating equipment, it comprises three-phase bridge rectification circuit, and the output of three-phase bridge rectification circuit is connected with the input of inverter circuit, and the output of inverter circuit is connected with resonant tank; Described inverter circuit is connected with pulse width modulator, and pulse width modulator links to each other with drive circuit, it is characterized in that: in described resonant tank, output transformer adopts dry-type transformer.
2, induction heating equipment according to claim 1 is characterized in that: described resonant tank is a series resonant tank.
3, induction heating equipment according to claim 1 is characterized in that: described resonant tank is the shunt-resonant circuit.
4, induction heating equipment according to claim 1 is characterized in that: described inverter circuit comprises full bridge inverter.
5, induction heating equipment according to claim 1 is characterized in that: described inverter circuit comprises half-bridge inversion circuit.
6, according to claim 1 or 4 described induction heating equipments, it is characterized in that: described three-phase bridge rectification circuit is connected with filter circuit, and filter circuit links to each other with power regulation circuit, and power regulation circuit is connected with inverter circuit.
7, induction heating equipment according to claim 6 is characterized in that: described power regulation circuit mainly is made of high power transistor (V501), and its collector electrode links to each other with the output of filter circuit, and emitter links to each other with the input of inverter circuit; And between collector electrode and emitter, be provided with diode (D701).
8, induction heating equipment according to claim 1 is characterized in that: the input of described three-phase bridge rectification circuit three cement resistors in parallel respectively (R101, R201, R301).
9, induction heating equipment according to claim 1, it is characterized in that: described inverter circuit is by four ambipolar gated transistors (V101～V401) constitute, (V101～V401) all be placed on the water box that water is housed is provided with at least one transducer in the described water box to four ambipolar gated transistors; And scribble silicone grease on the described water box.
10, induction heating equipment according to claim 1 is characterized in that: described pulse width modulator respectively with current foldback circuit, overheating protection circuit, owe the water conservation circuit and be connected with overvoltage crowbar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820070814 CN201204714Y (en) | 2008-05-30 | 2008-05-30 | Induction heating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820070814 CN201204714Y (en) | 2008-05-30 | 2008-05-30 | Induction heating apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN201204714Y true CN201204714Y (en) | 2009-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200820070814 Expired - Fee Related CN201204714Y (en) | 2008-05-30 | 2008-05-30 | Induction heating apparatus |
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| CN (1) | CN201204714Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946654A (en) * | 2012-11-14 | 2013-02-27 | 明达实业(厦门)有限公司 | Half-wave electromagnetic field generator |
| CN103296917A (en) * | 2013-06-09 | 2013-09-11 | 江苏节高电子有限公司 | Full-bridge type inverter driving circuit |
| CN104582047A (en) * | 2014-12-19 | 2015-04-29 | 深圳市国创新能源研究院 | Electromagnetic oven simulating naked flames, and power control method of electromagnetic oven |
| CN104638901A (en) * | 2015-03-05 | 2015-05-20 | 潍坊市金华信电炉制造有限公司 | Energy-saving type IGBT (insulated gate bipolar transistor) serial inverting medium-frequency power source device |
| CN105072729A (en) * | 2015-09-16 | 2015-11-18 | 厦门安东电子有限公司 | Dual-half-bridge resonant induction heating power supply main circuit and system thereof |
| CN108684094A (en) * | 2018-04-11 | 2018-10-19 | 佛山市众拓科技有限公司 | The electromagnetic oven that more electromagnetic coils will not be interfered with each other using same frequency Synchronous Heating |
| CN111741548A (en) * | 2020-08-14 | 2020-10-02 | 佛山市冉智电子科技有限公司 | Low-power-consumption induction heating power control system |
| CN114698165A (en) * | 2020-12-25 | 2022-07-01 | 杭州泰昕微电子有限公司 | Power semiconductor integrated device applied to electromagnetic energy-saving stove |
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2008
- 2008-05-30 CN CN 200820070814 patent/CN201204714Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946654A (en) * | 2012-11-14 | 2013-02-27 | 明达实业(厦门)有限公司 | Half-wave electromagnetic field generator |
| CN102946654B (en) * | 2012-11-14 | 2015-11-04 | 明达实业(厦门)有限公司 | A kind of half-wave electromagnetic field generator |
| CN103296917A (en) * | 2013-06-09 | 2013-09-11 | 江苏节高电子有限公司 | Full-bridge type inverter driving circuit |
| CN103296917B (en) * | 2013-06-09 | 2015-06-03 | 江苏节高电子有限公司 | Full-bridge type inverter driving circuit |
| CN104582047A (en) * | 2014-12-19 | 2015-04-29 | 深圳市国创新能源研究院 | Electromagnetic oven simulating naked flames, and power control method of electromagnetic oven |
| CN104582047B (en) * | 2014-12-19 | 2016-08-17 | 深圳市国创新能源研究院 | A kind of electromagnetic oven emulating naked light and Poewr control method thereof |
| CN104638901A (en) * | 2015-03-05 | 2015-05-20 | 潍坊市金华信电炉制造有限公司 | Energy-saving type IGBT (insulated gate bipolar transistor) serial inverting medium-frequency power source device |
| CN105072729A (en) * | 2015-09-16 | 2015-11-18 | 厦门安东电子有限公司 | Dual-half-bridge resonant induction heating power supply main circuit and system thereof |
| CN105072729B (en) * | 2015-09-16 | 2017-04-12 | 厦门安东电子有限公司 | Dual-half-bridge resonant induction heating power supply main circuit and system thereof |
| CN108684094A (en) * | 2018-04-11 | 2018-10-19 | 佛山市众拓科技有限公司 | The electromagnetic oven that more electromagnetic coils will not be interfered with each other using same frequency Synchronous Heating |
| CN111741548A (en) * | 2020-08-14 | 2020-10-02 | 佛山市冉智电子科技有限公司 | Low-power-consumption induction heating power control system |
| CN114698165A (en) * | 2020-12-25 | 2022-07-01 | 杭州泰昕微电子有限公司 | Power semiconductor integrated device applied to electromagnetic energy-saving stove |
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