CN104638902B - A kind of energy-saving IGBT series resonant inverters intermediate frequency power supply device - Google Patents
A kind of energy-saving IGBT series resonant inverters intermediate frequency power supply device Download PDFInfo
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- CN104638902B CN104638902B CN201510096902.4A CN201510096902A CN104638902B CN 104638902 B CN104638902 B CN 104638902B CN 201510096902 A CN201510096902 A CN 201510096902A CN 104638902 B CN104638902 B CN 104638902B
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
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- 239000000571 coke Substances 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The present invention relates to a kind of energy-saving IGBT series resonant inverters intermediate frequency power supply device; IGBT Serial inverting circuits, rectification main circuit, driving power circuit, Voltage-Controlled oscillation circuit including electrical connection, commutating pulse form circuit and protection signal circuit; power factor is high, harmonic pollution is small, line loss is small; power consumption is low, burn-off rate is fast; the energy has been saved, has avoided the pollution to power network and environment.
Description
Technical field
The present invention relates to a kind of energy-saving IGBT series resonant inverters intermediate frequency power supply device, belongs to frequency-changing and current transforming technology and casting skill
Art field.
Background technology
As sensing heating application field increasingly constantly expands, and the continuous development of power semiconductor device technology, together
When to respond the call of national energy-saving emission reduction policy, the positive energy-conservation of intermediate frequency induction heating power supply, it is quick, sent out without harmonic wave interference direction
Exhibition.Then it is to be controlled to turn to Digital Control development by simulation, to improve the integrated level of control system and stably in control system
Property；In terms of intelligent control, by automatic control equipments such as PLC and configuration softwares, the intellectuality of complete equipment is done step-by-step；
In terms of inversion form, then developed from parallel inverter in terms of series resonant inverter, to improve output voltage, reduce mesh current, reduce
Line loss.
The fusing form that domestic foundry industry uses at present is essentially two kinds, first, coke cupola melting is used, second, adopting
Melted with traditional thyristor intermediate frequency electric source in parallel (KGPS)；Coke cupola melting formal cause operating efficiency is low, energy waste
Seriously, environmental pollution is serious, and the shortcomings of unmanageable casting quality, is prohibitted the use of by country at present；It is in parallel controllable
Silicon intermediate frequency power supply is because it uses pressure regulation Power Regulation, and load uses parallel resonance mode, so its power factor can not remain at
More than 0.93, power factor is then relatively low during low power run, and harmonic pollution is serious, and current distortion is higher, and parallel inverter is in addition
A kind of current mode inversion, the big line loss of voltage low current are serious.Both firing equipment operating efficiencies are low, and energy waste is tight
Weight, it is serious to power network and environmental pollution.
The content of the invention
The technical problem to be solved in the present invention is the deficiency for more than, there is provided a kind of power factor is high, harmonic pollution is small, line
Path loss consumption is small, the energy-saving IGBT series resonant inverters intermediate frequency power supply device that power consumption is low, burn-off rate is fast, has saved the energy, has avoided
Pollution to power network and environment.
To solve above technical problem, the present invention uses following technical scheme：A kind of energy-saving IGBT series resonant inverters intermediate frequency
Supply unit, including it is the IGBT Serial inverting circuits of electrical connection, rectification main circuit, driving power circuit, Voltage-Controlled oscillation circuit, whole
Flow pulse shaping circuit and protection signal circuit.
The IGBT Serial inverting circuits include IGBT module T1, T2, T3, T4 and capacitor C1, C2, and inverter is by IGBT
Module T1, T2, T3, T4 and capacitor C1, C2 composition half-bridge converter.
The gate pole of the IGBT module T1 connects electric capacity CF1 positive pole, and electric capacity CF1 negative pole connects electric capacity CF2 positive pole, electric capacity
CF2 negative pole connects IGBT module T2 emitter stage.
The colelctor electrode of the IGBT module T2 connects IGBT module T1 emitter stage, and IGBT module T1 colelctor electrode connects respectively
IGBT module T3 colelctor electrode and electric capacity C1 one end.
The emitter stage of the IGBT module T3 connects IGBT module T1 emitter stage, the IGBT module T3 sensed stove of emitter stage
Equivalent inductance and resistance L, R connect the electric capacity C1 other end.
Another termination capacitor C2 of electric capacity C1 one end, electric capacity C2 another termination IGBT module T4 emitter stage.
Described C1, C2 specification are identical.
Described L, R are the equivalent inductance and resistance of induction furnace.
After the present invention uses above technical scheme, compared with prior art, there is advantages below：
1st, power factor is high, and harmonic pollution is small：The power factor of energy-saving IGBT series resonant inverters intermediate frequency power supply device is all the time
More than 0.95, harmonic content is small, and less than country, " requirement of odd harmonic and even-order harmonic sum less than 5% ", even-order harmonic are small
In 2%, odd harmonic and even-order harmonic sum are less than 5%, meet national standard（GB/T14549-93）《Quality of power supply utility network
Harmonic wave》Requirement.
2nd, line loss is small, and power consumption is low, and 25%-30% is saved than like product：Output par, c medium frequency electric in this invention
Pressure is high（2800V）, output current is small (2.5-3 times of DC current), and the output voltage of other intermediate frequency power supplies is up at present
1500V, output current is 5-6 times of DC current, by taking 600KW equipment as an example, energy-saving IGBT series resonant inverters intermediate frequency power supply dress
The voltage of intermediate frequency put is 2800V, electric current of intermediate frequency 3600A, and the voltage of intermediate frequency of common controllable silicon equipment is 1500V, medium frequency electric
Flow for 6800A, it is assumed that the internal resistance of output par, c is r, then line loss is respectively：Energy-saving IGBT series resonant inverters intermediate frequency power supply dress
Line loss P1=the I2r put=(3600) 2*r, line loss P2=I2r=(6800) 2*r of common thyristor intermediate frequency electric source, it is general
The line loss of logical thyristor intermediate frequency electric source is far longer than the line loss of energy-saving IGBT series resonant inverters intermediate frequency power supply assembling.
In terms of power consumption, the ton power consumption of energy-saving IGBT series resonant inverters intermediate frequency power supply device is 520-550 degree, and current
The power consumption of domestic and international advanced controllable silicon smelting equipment is 650-680 degree, can save energy 25%-30%.
3rd, constant power output, burn-off rate are fast：Energy-saving IGBT series resonant inverters intermediate frequency power supply device in this invention, it is
The currently the only equipment that can realize constant power output, by taking 600KW equipment as an example, one stove of fusing needs 55 minutes altogether, wherein having
The time service of 53 minutes reaches 96% in invariable power state, invariable power time, and this is that miscellaneous equipment is unable to reach；
On the one hand because energy-saving IGBT series resonant inverters intermediate frequency power supply device realizes invariable power, 96% is reached, additionally, due to
Energy-saving IGBT series resonant inverters intermediate frequency power supply device intermediate frequency power supply voltage of intermediate frequency is high, electromagnetic coupled efficiency high, reaches 98%, two sides
Face reason make it that energy-saving IGBT series resonant inverters intermediate frequency power supply device burn-off rate is especially fast, only 20 points of 150KG/300KW equipment
Zhong Yilu, ton power consumption：550 degree, 45 minutes stoves of 1000KG/700KW equipment, 520 degree of ton power consumption, miscellaneous equipment can not
Reach such a speed.
The present invention is described in detail with reference to the accompanying drawings and examples.
Brief description of the drawings
Accompanying drawing 1 is the IGBT Serial inverting circuits of energy-saving IGBT series resonant inverters intermediate frequency power supply device in the embodiment of the present invention
Schematic diagram；
Accompanying drawing 2 is the rectification main circuit principle of energy-saving IGBT series resonant inverters intermediate frequency power supply device in the embodiment of the present invention
Figure；
Accompanying drawing 3 is the driving power circuit theory of energy-saving IGBT series resonant inverters intermediate frequency power supply device in the embodiment of the present invention
Figure；
Accompanying drawing 4 is the Voltage-Controlled oscillation circuit principle of energy-saving IGBT series resonant inverters intermediate frequency power supply device in the embodiment of the present invention
Figure；
Accompanying drawing 5 is that the commutating pulse of energy-saving IGBT series resonant inverters intermediate frequency power supply device in the embodiment of the present invention forms circuit
Schematic diagram；
Accompanying drawing 6 is the protection signal circuit theory of energy-saving IGBT series resonant inverters intermediate frequency power supply device in the embodiment of the present invention
Figure；
Accompanying drawing 7 is the power factor change figure of energy-saving IGBT series resonant inverters intermediate frequency power supply device in the embodiment of the present invention；
Accompanying drawing 8 is that 5 subharmonic of energy-saving IGBT series resonant inverters intermediate frequency power supply device in the embodiment of the present invention contain spirogram；
Accompanying drawing 9 is that 7 subharmonic of energy-saving IGBT series resonant inverters intermediate frequency power supply device in the embodiment of the present invention contain spirogram；
Accompanying drawing 10 is the changed power curve figure of energy-saving IGBT series resonant inverters intermediate frequency power supply device in the embodiment of the present invention.
Embodiment
Embodiment, a kind of energy-saving IGBT series resonant inverters intermediate frequency power supply device include the IGBT series resonant inverters electricity of electrical connection
Road, rectification main circuit, driving power circuit, Voltage-Controlled oscillation circuit, commutating pulse form circuit and protection signal circuit.
As shown in Figure 1, IGBT Serial inverting circuits include IGBT module T1, T2, T3, T4 and capacitor C1, C2, inversion
Device connects electric capacity by IGBT module T1, T2, T3, T4 and capacitor C1, C2 composition half-bridge converter, IGBT module T1 colelctor electrode
CF1 positive pole, electric capacity CF1 negative pole connect electric capacity CF2 positive pole, and electric capacity CF2 negative pole meets IGBT module T2 emitter stage, IGBT
Module T2 colelctor electrode connects IGBT module T1 emitter stage, and IGBT module T1 colelctor electrode connects IGBT module T3 colelctor electrode respectively
With electric capacity C1 one end, IGBT module T3 emitter stage connects IGBT module T1 emitter stage, and IGBT module T3 emitter stage is through sense
Answer the equivalent inductance of stove and resistance L, R connect the electric capacity C1 other end, electric capacity C1 another termination capacitor C2 one end, electric capacity C2's
Another termination IGBT module T4 emitter stage.
C1, C2 specification are identical, and L, R are the equivalent inductance and resistance of induction furnace.
Its course of work is as follows：Constant DC voltage is added between positive pole and cathode bus bar, is divided equally by electric capacity C1, C2,
They all just descend negative voltage filled with upper, now, trigger T1, T3, then the electric current for flowing through induction furnace is made up of two parts.When C1
Discharge stream：C1 upper ends-T1, T3-L, R-C1 lower end, another way are C2 charging currents：CFUpper end T1, T3-L, R-CFLower end.This
Two-way is all a part for same resonance circuit, and the former is made up of C1, L, R, and the latter is made up of C2, L, R.Due to C1=C2, thus
Two circuit work frequencies are identical, equal to the resonant frequency by C=C1+C2, L, R built-up circuit.Terminate when C1 discharges, thereon voltage
Must be U for the upper charging voltages of 0, C2D, because CFBoth end voltage UDConstant, its value is equal to the upper voltage sum of C1, C2.At this moment flow through
L, R electric current is maximum, under the magnetic field energy effect stored in L, maintains above-mentioned two-way electric current to continue to circulate, makes C1 reverse chargings
Just above born into lower, and C2 is then from UDValue continues to raise, until magnetic field energy is down to 0.At this moment, voltage all reaches on the upper back-pressures of C1 and C2
To maximum, the electric current that induction furnace L is flowed through to this is just half of sine wave.Then in the presence of capacitance voltage, two are formed
Road and foregoing two-way path are essentially identical（Simply the pipe of afterflow two in module replaces T1, T3 stream electric current）, direction it is antipodal
Electric current, this electric current are still changed by sinusoidal rule, until C1 again positive charge to 1/2UD, C2 voltage also reverts to 1/2UD, electric current
0 is down to, the electric current for flowing through induction furnace is just a sinusoidal negative half-wave.Then T2, T4 are triggered, i.e. C2 discharges through L, R, T2, T4, C1
It is electrically charged through L, R, T2, T4, the electric current for flowing through induction furnace is equally made up of two parts, and its frequency is equal to L, R, C (=C1+C2)
The resonant frequency of built-up circuit.So the power frequency for flowing through induction furnace must be identical.
The above-mentioned course of work, load obtain energy by the circuit natural oscillation half period from power supply, and another half period is again by energy
Amount sends power supply back to.Therefore, the power very little that load obtains, to make load obtain peak power, it is necessary to make triggering frequency close to electricity
The natural mode shape on road.
Series resonant inverter is voltage-type resonance, during power work, the pressure drop value in pressure drop and electric capacity C on body of heater coil L
Their value equal and in opposite direction is high compared with supply voltage 3-5 times, and controllable silicon parallel resonance, and the voltage on induction coil only has electricity
1.5 times or so of source voltage, and loss power P=I of coil2R, can due in IGBT series resonances being that voltage is high and electric current is small
Control silicon parallel resonance is that voltage is low and electric current is big, so, IGBT series resonance line losses are small.
As shown in Figure 2, rectification main circuit includes inductance TA, inductance TB and inductance TC, inductance TA, inductance TB and inductance TC
A termination breaker, the inductance TA other end meets commutation diode D7 positive pole, electric capacity C7 one end and diode D1 respectively
Positive pole, the electric capacity C7 other end connects commutation diode D7 negative pole through resistance R1, and diode D1 negative pole connects whole through resistance Ra
Diode D7 negative pole is flowed, the inductance TA other end connects diode D4 negative pole and electric capacity C4 one end respectively, and electric capacity C4's is another
One end connects diode D4 positive pole through resistance R4；
The inductance TB other end connects the positive pole of commutation diode D8 positive pole, electric capacity C3 one end and diode D3 respectively,
The electric capacity C3 other end connects commutation diode D8 negative pole through resistance R3, and diode D3 negative pole connects commutation diode through resistance Rb
D8 negative pole, the inductance TB other end connect diode D6 negative pole and electric capacity C6 one end respectively, and the electric capacity C6 other end is through electricity
Resistance R6 connects diode D6 positive pole；
The inductance TC other end connects the positive pole of commutation diode D9 positive pole, electric capacity C5 one end and diode D5 respectively,
The electric capacity C5 other end connects commutation diode D9 negative pole through resistance R5, and diode D5 negative pole connects commutation diode through resistance Rc
D9 negative pole, the inductance TC other end connect diode D2 negative pole and electric capacity C8 one end respectively, and the electric capacity C8 other end is through electricity
Resistance R2 connects diode D2 positive pole.
Using half control commutation technique, rectification thyristor is set to be in fully conducting state all the time, DC voltage remains at
500V, avoid using the harmonic pollution for realizing that Power Regulation brings by adjusting the angle of flow of rectification thyristor.Power adjusting uses
Frequency modulation Power Regulation, the power factor of circuit is remained at more than 95%, energy-conservation can be realized.
As shown in Figure 3, driving power circuit includes IC 1 and IC 2, and IC 1 is whole
Bridge heap KBPC610 is flowed, the "+" end of IC 1 is grounded through electric capacity C9, the "-" end ground connection of IC 1, integrated circuit
IC1 "+" end is grounded through electric capacity C10, and the "+" end of IC 1 connects triode Q1 base stage through resistance R7, triode Q1's
Emitter stage connects the "+" end of IC 1, and triode Q1 colelctor electrode is grounded through electric capacity C12, and triode Q1 colelctor electrode is through electricity
Hold C11 ground connection, resistance R8 and light emitting diode the D10 ground connection that triode Q1 colelctor electrode is concatenated, triode Q1 colelctor electrode
Connect the Vout ends of IC 2, the Vin termination triodes Q1 of IC 2 emitter stage, the GND ends of IC 2
Ground connection, IC 2 is three terminal regulator 7815.
As shown in Figure 4, Voltage-Controlled oscillation circuit includes IC 3, and IC 3 is CD4046, integrated circuit
IC3 R2 termination variable resistors R9 one end, the variable resistor R9 other end are grounded through resistance R13, the R1 ends of IC 3
Variable resistor R10 one end is connect, the variable resistor R10 other end is grounded through resistance R14, and the CB ends of IC 3 are through parallel connection
Electric capacity C13 and electric capacity C14 connect the CA ends of IC 3, the INH ends ground connection of IC 3, IC 3
VCIN ends meet VCIN through resistance R11, and VCIN is the output of pi regulator, and pi regulator input is respectively Power Regulation voltage TG（It is negative
Value）, phase difference VZ（On the occasion of）, resistance R12 and electric capacity C15 of the VCIN ends of IC 3 through parallel connection are grounded.
As shown in Figure 5, commutating pulse, which forms circuit, includes IC 4, and IC 4 controls for Switching Power Supply
Device KA3525A, the EAOUT ends of EA (-) termination IC 4 of IC 4, EA (+) termination collection of IC 4
Into the SOFTSTART ends of IC circuit 4, the DISCHARGE ends of the CT termination ICs 4 of IC 4, integrated circuit
IC4 RT ends are grounded through resistance R15, and the CT ends of IC 4 are grounded through electric capacity C16, the SHUA DOWN of IC 4
Resistance R16 and electric capacity C17 through parallel connection are grounded at end, and the OUTA ends of IC 4 are grounded through resistance R17, IC 4
GND ends are grounded, and the VC ends of IC 4 connect+15V voltages through resistance R18, the Vcc termination+15V voltages of IC 4,
Electric capacity C18 and electric capacity C19 through parallel connection are grounded at the Vcc ends of IC 4, the OUTA termination FETs of IC 4
Q3 G ends, FET Q3 S ends ground connection, the resistance R19 and light emitting diode D11 that FET Q3 D ends are concatenated meet master
Control plate lead-out terminal CON11 1 pin, FET Q3 model IRF630N.
As shown in Figure 6, protection signal circuit includes IC 5, IC6 and IC7, IC 5, IC6 and IC7
Be dual operational amplifier LM358, IC 5 includes IC5A and IC5B two parts, IC 6 include IC6A and
IC6B two parts, IC 7 include IC7A and IC7B two parts, resistance R20 that the 5th pin of IC 5 is concatenated,
R21 and R22 connects the 6th pin of IC 5, and the 6th pin connecting resistance R22 of IC 5 one end, resistance R22's is another
End is grounded through resistance R26, and the resistance R22 other end connects the 2nd pin of IC 5 through resistance R5, and the 4th of IC 5 the
Pin is grounded, and the 8th foot meridian capacitor C20 ground connection of IC 5, the 8th pin of IC 5 meets VCC, IC 5
3rd pin meets VCC through resistance R27；
Resistance R23 and diode D12 that 7th pin of IC 5 is concatenated connect triode Q2 colelctor electrode, integrate electricity
Resistance R23 and resistance R24 that road IC5 the 7th pin is concatenated connect the 5th pin of IC 6, and the 8th pin of IC 6 connects
VCC, the 4th pin ground connection of IC 6, the 6th pin of IC 6 meet VCC through resistance R28, and the 6th of IC 6 the
Pin is grounded through resistance R29, and the 6th pin of IC 6 connects the 2nd pin of IC 6, and the 1st pin of IC 5 is through string
The resistance R30 and resistance R31 of connection connect the 3rd pin of IC 6, resistance R30 that the 1st pin of IC 5 is concatenated and
Diode D17 connects triode Q2 colelctor electrode；
Resistance R32 and light emitting diode the D13 ground connection that 7th pin of IC 6 is concatenated, the 7th of IC 6 the
Diode D14 and resistance R34 that pin is concatenated ground connection, the diode D15 and resistance R34 that the 1st pin of IC 6 is concatenated
Ground connection, resistance R33 and light emitting diode the D16 ground connection that the 1st pin of IC 6 is concatenated；
Diode D14 and resistance R35 that 7th pin of IC 6 is concatenated connect the 2nd pin of IC 7, integrate
3rd pin of IC circuit 7 meets the 5th pin of IC 7, the 1st pin connecting resistance R36 of IC 7 one end, resistance R36
Another terminating diode D19 negative pole, diode D19 positive pole is grounded through electric capacity C21, and diode D19 positive pole is through resistance
R37 meets VCC, and the 3rd pin of IC 7 is grounded through resistance R39, the 3rd pin connecting resistance R38 of IC 7 one end, electricity
R38 another terminating resistor R40 one end and diode D18 negative pole is hindered, resistance the R40 other end and diode D18 are just
Pole connects the 6th pin of IC 7 through resistance R41, and diode D18 positive pole is grounded through electric capacity C23, and the 4th of IC 7 the
Pin is grounded, and the 8th foot meridian capacitor C22 ground connection of IC 7, the 7th pin of IC 7 meets triode Q2 through resistance R42
Base stage, triode Q2 grounded emitter.
As shown in Figure 7, the power factor of energy-saving IGBT series resonant inverters intermediate frequency power supply device is consistently greater than 0.95, average
More than 0.98.
As illustrated in Figure 8 and 9 reference, 5 subharmonic of energy-saving IGBT series resonant inverters intermediate frequency power supply device and 7 subharmonic are equal
Less than 5%, even-order harmonic is respectively less than 2%, and odd harmonic and even-order harmonic sum are less than 5%, meet national standard（GB/T14549-
93）《Quality of power supply utility network harmonic wave》Requirement.
As shown in Figure 10, by taking 600KW equipment as an example, the energy-saving IGBT series resonant inverters intermediate frequency power supply device fusing of the present invention
One stove needs 55 minutes altogether, wherein the time service for having 53 minutes reaches 96% in invariable power state, invariable power time, this is
What miscellaneous equipment was unable to reach.
On the one hand because energy-saving IGBT series resonant inverters intermediate frequency power supply device realizes invariable power, 96% is reached, additionally, due to
Energy-saving IGBT series resonant inverters intermediate frequency power supply device intermediate frequency power supply voltage of intermediate frequency is high, electromagnetic coupled efficiency high, reaches 98%, two sides
Face reason make it that energy-saving IGBT series resonant inverters intermediate frequency power supply device burn-off rate is especially fast, only 20 points of 150KG/300KW equipment
Zhong Yilu, ton power consumption：550 degree, 45 minutes stoves of 1000KG/700KW equipment, 520 degree of ton power consumption, miscellaneous equipment can not
Reach such a speed.
One skilled in the art would recognize that above-mentioned embodiment is exemplary, it is in order that ability
Field technique personnel can be better understood from present invention, should not be understood as limiting the scope of the invention, every
According to technical solution of the present invention improvements introduced, protection scope of the present invention is each fallen within.
Claims (6)
- A kind of 1. energy-saving IGBT series resonant inverters intermediate frequency power supply device, it is characterised in that：IGBT series resonant inverters including electrical connection Circuit, rectification main circuit, driving power circuit, Voltage-Controlled oscillation circuit, commutating pulse form circuit and protection signal circuit；The IGBT Serial inverting circuits include IGBT module T1, T2, T3, T4 and capacitor C1, C2, and inverter is by IGBT module T1, T2, T3, T4 and capacitor C1, C2 composition half-bridge converter；The colelctor electrode of the IGBT module T1 connects electric capacity CF1 positive pole, and electric capacity CF1 negative pole connects electric capacity CF2 positive pole, electric capacity CF2 negative pole connects IGBT module T2 emitter stage；The colelctor electrode of the IGBT module T2 connects IGBT module T1 emitter stage, and IGBT module T1 colelctor electrode connects IGBT moulds respectively Block T3 colelctor electrode and electric capacity C1 one end；The protection signal circuit includes IC 5, IC6 and IC7, and IC 5, IC6 and IC7 are that double computings are put Big device LM358, IC 5 include IC5A and IC5B two parts, and IC 6 includes IC6A and IC6B two parts, collection Include IC7A and IC7B two parts into IC circuit 7, resistance R20, R21 and R22 that the 5th pin of IC 5 is concatenated connect collection Into the 6th pin of IC circuit 5, the 6th pin connecting resistance R22 of IC 5 one end, the resistance R22 other end connects through resistance R26 Ground, the resistance R22 other end connect the 2nd pin of IC 5 through resistance R5, the 4th pin ground connection of IC 5, integrate electricity Road IC5 the 8th foot meridian capacitor C20 ground connection, the 8th pin of IC 5 meet VCC, and the 3rd pin of IC 5 is through resistance R27 Meet VCC.
- A kind of 2. energy-saving IGBT series resonant inverters intermediate frequency power supply device as claimed in claim 1, it is characterised in that：The IGBT Module T3 emitter stage connects IGBT module T1 emitter stage, the equivalent inductance and resistance of the IGBT module T3 sensed stove of emitter stage L, R connects the electric capacity C1 other end.
- A kind of 3. energy-saving IGBT series resonant inverters intermediate frequency power supply device as claimed in claim 2, it is characterised in that：The electric capacity C1 another termination capacitor C2 one end, electric capacity C2 another termination IGBT module T4 emitter stage.
- A kind of 4. energy-saving IGBT series resonant inverters intermediate frequency power supply device as claimed in claim 3, it is characterised in that：The C1, C2 specification is identical.
- A kind of 5. energy-saving IGBT series resonant inverters intermediate frequency power supply device as claimed in claim 2, it is characterised in that：Described L, R For the equivalent inductance and resistance of induction furnace.
- A kind of 6. energy-saving IGBT series resonant inverters intermediate frequency power supply device as claimed in claim 1, it is characterised in that：It is described integrated Resistance R23 and diode D12 that 7th pin of IC circuit 5 is concatenated connect triode Q2 colelctor electrode, the 7th pin of IC 5 The resistance R23 and resistance R24 that are concatenated connect the 5th pin of IC 6, and the 8th pin of IC 6 meets VCC, integrated circuit IC6 the 4th pin ground connection, the 6th pin of IC 6 meet VCC through resistance R28, and the 6th pin of IC 6 connects through resistance R29 Ground, the 6th pin of IC 6 connect the 2nd pin of IC 6, resistance R30 that the 1st pin of IC 5 is concatenated and Resistance R31 connects the 3rd pin of IC 6, and the resistance R30 and diode D17 that the 1st pin of IC 5 is concatenated connect three Pole pipe Q2 colelctor electrode；Resistance R32 and light emitting diode the D13 ground connection that 7th pin of IC 6 is concatenated, the 7th pin warp of IC 6 Diode D14 and the resistance R34 ground connection of series connection, the diode D15 and resistance R34 that the 1st pin of IC 6 is concatenated connect Ground, resistance R33 and light emitting diode the D16 ground connection that the 1st pin of IC 6 is concatenated；Diode D14 and resistance R35 that 7th pin of IC 6 is concatenated connect the 2nd pin of IC 7, integrated circuit IC7 the 3rd pin connects the 5th pin of IC 7, and the 1st pin connecting resistance R36 of IC 7 one end, resistance R36's is another One terminating diode D19 negative pole, diode D19 positive pole are grounded through electric capacity C21, and diode D19 positive pole connects through resistance R37 VCC, the 3rd pin of IC 7 are grounded through resistance R39, the 3rd pin connecting resistance R38 of IC 7 one end, resistance R38 Another terminating resistor R40 one end and diode D18 negative pole, the resistance R40 other end and diode D18 positive pole are through electricity Resistance R41 connects the 6th pin of IC 7, and diode D18 positive pole is grounded through electric capacity C23, and the 4th pin of IC 7 connects Ground, the 8th foot meridian capacitor C22 ground connection of IC 7, the 7th pin of IC 7 connect triode Q2 base through resistance R42 Pole, triode Q2 grounded emitter.
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| CN201510096902.4A CN104638902B (en) | 2015-03-05 | 2015-03-05 | A kind of energy-saving IGBT series resonant inverters intermediate frequency power supply device |
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| CN104638901B (en) * | 2015-03-05 | 2017-04-12 | 山东华信电炉有限公司 | Energy-saving type IGBT (insulated gate bipolar transistor) serial inverting medium-frequency power source device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2150944Y (en) * | 1992-07-17 | 1993-12-29 | 山东工业大学 | Silicon control medium frequency induction furnace |
| US6160374A (en) * | 1999-08-02 | 2000-12-12 | General Motors Corporation | Power-factor-corrected single-stage inductive charger |
| CN201113823Y (en) * | 2007-09-13 | 2008-09-10 | 石家庄天炉变频设备有限公司 | Intermediate frequency furnace frequency conversion power source |
| CN201750334U (en) * | 2010-05-20 | 2011-02-16 | 丁立武 | Power supply circuit of induction heating electric furnace |
-
2015
- 2015-03-05 CN CN201510096902.4A patent/CN104638902B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2150944Y (en) * | 1992-07-17 | 1993-12-29 | 山东工业大学 | Silicon control medium frequency induction furnace |
| US6160374A (en) * | 1999-08-02 | 2000-12-12 | General Motors Corporation | Power-factor-corrected single-stage inductive charger |
| CN201113823Y (en) * | 2007-09-13 | 2008-09-10 | 石家庄天炉变频设备有限公司 | Intermediate frequency furnace frequency conversion power source |
| CN201750334U (en) * | 2010-05-20 | 2011-02-16 | 丁立武 | Power supply circuit of induction heating electric furnace |
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Denomination of invention: An energy-saving IGBT series inverter intermediate frequency power supply device Effective date of registration: 20231025 Granted publication date: 20180306 Pledgee: Weifang branch of Bank of Beijing Co.,Ltd. Pledgor: SHANDONG HUAXIN ELECTRIC FURNACE Co.,Ltd. Registration number: Y2023980062749 |