CN109327147A - A kind of power regulation device of High Frequency Solid State induction heating power - Google Patents
A kind of power regulation device of High Frequency Solid State induction heating power Download PDFInfo
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- CN109327147A CN109327147A CN201811424272.9A CN201811424272A CN109327147A CN 109327147 A CN109327147 A CN 109327147A CN 201811424272 A CN201811424272 A CN 201811424272A CN 109327147 A CN109327147 A CN 109327147A
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- circuit
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- high frequency
- power
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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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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 invention discloses a kind of power regulation device of High Frequency Solid State induction heating power, which connect with high-frequency inverter, which includes sequentially connected major loop control unit, AC/DC conversion module, current-limiting reactor, DC/DC conversion module；AC/DC conversion module is made of three-phase bridge rectification circuit；DC/DC conversion module includes sequentially connected filter capacitor, bridge inverter main circuit, high frequency transformer, rectification circuit；The output voltage duty ratio of bridge inverter main circuit is controlled by the turn-on time of the switch element in control bridge inverter main circuit, to adjust the DC voltage of rectification circuit output, to realize the adjusting to the output power of high-frequency inverter, solves the problems such as traditional big, low efficiency low, serious to harmonic pollution in electric power net using power factor present in the three-phase full-controlled rectifier bridge circuit progress Power Regulation being made of silicon-controlled (thyristor), using power frequency triphase step-down transformer decompression volume, at high cost.
Description
Technical field
The present invention relates to technology High Frequency Solid State induction heating power field, in particular to a kind of High Frequency Solid State induction heating electricity
The power regulation device in source.
Background technique
The size of High Frequency Solid State induction heating power output power is adjusted and is controlled, is High Frequency Solid State induction heating
The important component of one of major function that power-supply device should have and High Frequency Solid State induction heating power.Power regulation circuit
Determine reliability, the volume and weight of High Frequency Solid State induction heating power equipment, the quality of performance is directly related to solid-state
The efficiency of high-frequency induction heating power equipment and to the harmonic pollution degree and its quality of power grid and service life.
The Power Regulation mode of traditional High Frequency Solid State induction heating power uses the three-phase being made of silicon-controlled (thyristor) complete
Rectifier circuit is controlled, the adjusting and control for exporting DC voltage height to it are realized by controlling the phase shift angle of its trigger pulse
System, the power factor of three-phase full-controlled rectifier bridge circuit reduce with the increase of the phase shift angle of trigger pulse, except inoperative exists
Under full output voltage state, otherwise, the power factor of three-phase full-controlled rectifier bridge circuit can be very low, and moreover, three-phase fully-controlled is whole
The harmonic wave that stream bridge circuit generates pollutes also quite serious caused by power grid.In addition to this, because of High Frequency Solid State induction heating electricity
The inverter bridge in source is made of switch mosfet element, solid in order to guarantee since the pressure resistance of current switch mosfet element is relatively low
The inverter bridge of state high-frequency induction heating power can work normally, and must just reduce the DC input voitage of inverter bridge, general institute
It adopts the technical scheme that and is depressured using AC-input voltage of the triphase step-down transformer to three-phase full-controlled rectifier bridge circuit
Thus processing reaches the mesh for exporting DC voltage decompression to it to meet High Frequency Solid State induction heating power inverter bridge operating condition
's.The drawbacks of this scheme is brought be triphase step-down transformer volume big, low efficiency, at high cost.
Summary of the invention
The object of the present invention is to provide a kind of power regulation devices of High Frequency Solid State induction heating power, solve traditional use
The three-phase full-controlled rectifier bridge circuit that is made of silicon-controlled (thyristor) carry out power factor present in Power Regulation it is low, to mains by harmonics
It is seriously polluted, using power frequency triphase step-down transformer decompression volume big, low efficiency, it is at high cost the problems such as.
To achieve the above object, the present invention provides following schemes:
A kind of power regulation device of High Frequency Solid State induction heating power, the power regulation device are connect with high-frequency inverter；It is described
Power regulation device includes major loop control unit, AC/DC conversion module, current-limiting reactor, DC/DC conversion module；The AC/DC becomes
Mold changing block is made of three-phase bridge rectification circuit；The DC/DC conversion module includes filter capacitor, bridge inverter main circuit, high frequency
Transformer, rectification circuit；The high frequency transformer is step-down transformer；
Three-phase alternating current is closed into the three-phase bridge rectification circuit by the major loop control unit hollow opening QM；
The positive and negative electrode of the output end of the three-phase bridge rectification circuit passes through the defeated of the current-limiting reactor and the filter capacitor respectively
Enter the positive and negative electrode connection at end；The bridge inverter main circuit is in parallel with the filter capacitor；The output end of the bridge inverter main circuit
It is connect with the first winding of the high frequency transformer；The input terminal of the secondary winding of the high frequency transformer and the rectification circuit
Connection；The output end of the rectification circuit is connect with the input terminal of the high-frequency inverter；The output end of the high-frequency inverter
It is connected with load；
The bridge inverter main circuit is controlled by controlling the turn-on time of the switch element in the bridge inverter main circuit
Output voltage duty ratio, to adjust the DC voltage of rectification circuit output, to realize to the high-frequency inverter
The adjusting of output power.
Optionally, the three-phase bridge rectification circuit is used to three-phase alternating current being rectified into pulsating dc voltage；Described three
Phase full bridge rectifier is made of diode or rectification module；
The current changing rate that the current-limiting reactor is used to export the three-phase bridge rectification circuit limits；It is described
Current-limiting reactor includes the first winding and the second winding；The anode of the output end of the three-phase bridge rectification circuit passes through the limit
The first winding for flowing reactor is connect with the anode of the input terminal of the filter capacitor；The output of the three-phase bridge rectification circuit
The cathode at end is connect by the second winding of the current-limiting reactor with the cathode of the input terminal of the filter capacitor；
The filter capacitor is used to for the pulsating dc voltage of three-phase bridge rectification circuit rectification output being filtered into flat
Sliding DC voltage；
The filter capacitor by electrolytic capacitor parallel connection group it is in parallel with equalizing resistance after it is in series again or by thin-film capacitor
The shunt capacitance group of composition is constituted.
Optionally, the bridge inverter main circuit is used to convert height for DC voltage smooth after filter capacitor filtering
Frequency ac square-wave voltage；The bridge inverter main circuit includes four device for power switching, respectively the first device for power switching, the
Two device for power switching, third device for power switching and the 4th device for power switching；First device for power switching and described
4th power switching device series form the first branch, second device for power switching and the third device for power switching string
Connection forms second branch, and the first branch and the second branch are in parallel；
Wherein, first device for power switching and the 4th device for power switching be packaged together to be formed it is integrated
IGBT component module, second device for power switching and the third device for power switching be packaged together to be formed it is integrated
IGBT component module or first device for power switching, second device for power switching, the third power switch device
Part, the 4th device for power switching are independent IGBT component module respectively.
Optionally, the bridge inverter main circuit further includes the first high frequency capacitance, the second high frequency capacitance, by resistance and capacitor string
Join the RC resistance capaciting absorpting circuit constituted；First high frequency capacitance, second high frequency capacitance are connected in parallel on the bridge type inverse
The direct-flow input end of circuit, first high frequency capacitance, second high frequency capacitance are used for as the continuous of the device for power switching
It flows diode and alternating current path is provided；The RC resistance capaciting absorpting circuit is connected in parallel on each device for power switching, the RC resistance
Hold the peak voltage that absorbing circuit is used to absorb the device for power switching both ends.
Optionally, the output end of the rectification circuit is connected by the input terminal of smoothing reactor and the high-frequency inverter
It connects；The smoothing reactor includes the first winding and the second winding；
The anode of the output end of the rectification circuit is connect with the input terminal of the first winding of the smoothing reactor, described
The cathode of the output end of rectification circuit is connect with the input terminal of the second winding of the smoothing reactor, the smoothing reactor
The output end of first winding, the smoothing reactor the second winding the output end input terminal with the high-frequency inverter respectively
Connection；
The smoothing reactor is filtered the Rectified alternating current stream that the rectification circuit exports.
Optionally, when needing to increase exponentially output current capacity, multiple DC/DC conversion modules are subjected in parallel connect
It connects, on each DC/DC conversion module also needs that equalizing reactor is arranged；The equalizing reactor is arranged in the rectification
Between circuit and the smoothing reactor；The equalizing reactor be used for when multiple DC/DC conversion modules are in parallel in application,
The output electric current of each DC/DC conversion module is flowed.
Optionally, the high-frequency ac square-wave voltage that the high frequency transformer is used to export the bridge inverter main circuit carries out
Decompression processing；The rectification circuit is used to the high-frequency ac square-wave voltage after high frequency transformer decompression be rectified into pulsation straight
Galvanic electricity pressure；
The high frequency transformer is the step-down transformer with a first winding, two secondary windings；The rectified current
Road is bridge rectifier；The bridge rectifier is by two bridge rectifier sub-circuit structures independent and that output end is in parallel
At；Each independent bridge rectifier sub-circuit is by bridge rectifier module composition or by Half bridge rectifier circuit module structure
It is connected and composed at or by independent diode element；
When the power regulation device is provided with a DC/DC conversion module, the secondary winding of the high frequency transformer
The input terminal with the bridge rectifier sub-circuit in the bridge rectifier connects one to one respectively；The bridge rectifier
Output end anode connect with the input terminal of the first winding of the smoothing reactor, the output end of the bridge rectifier
Cathode connect with the input terminal of the second winding of the smoothing reactor；
When the power regulation device is provided with multiple DC/DC conversion modules, the secondary winding of the high frequency transformer
The input terminal with the bridge rectifier sub-circuit in the bridge rectifier connects one to one respectively；The bridge rectifier
The anode of output end connect with the input terminal of the first winding of the smoothing reactor by the equalizing reactor, the bridge
The cathode of the output end of formula rectification circuit is connect with the input terminal of the second winding of the smoothing reactor.
Optionally, the high-frequency ac square-wave voltage that the high frequency transformer is used to export the bridge inverter main circuit carries out
Decompression processing；The rectification circuit is used to the high-frequency ac square-wave voltage after high frequency transformer decompression be rectified into pulsation straight
Galvanic electricity pressure；
The high frequency transformer is the downconverter with a first winding, the secondary winding of Intermediate Gray tap
Device；The rectification circuit is full-wave rectifying circuit；The full-wave rectifying circuit is made of two diodes；Two diodes
Cathode parallel connected end be the full-wave rectifying circuit output end anode；The centre tap of the secondary winding is the all-wave
The cathode of rectification circuit output end；
When the power regulation device is provided with a DC/DC conversion module, the secondary winding of the high frequency transformer
Both ends respectively with the diode of the full-wave rectifying circuit anode connect；The anode of the output end of the full-wave rectifying circuit
It is connect with the input terminal of the first winding of the smoothing reactor, the centre tap of the secondary winding of the high frequency transformer and institute
State the input terminal connection of the second winding of smoothing reactor；The output end of first winding of the smoothing reactor, the flat wave
The output end of second winding of reactor is connect with the input terminal of the high-frequency inverter respectively；
When the power regulation device is provided with multiple DC/DC conversion modules, the secondary winding of the high frequency transformer
Both ends respectively with the diode of the full-wave rectifying circuit anode connect；The anode of the output end of the full-wave rectifying circuit
Connect by the equalizing reactor with the input terminal of the first winding of the smoothing reactor, the high frequency transformer it is secondary
The centre tap of winding is connect with the input terminal of the second winding of the smoothing reactor；First winding of the smoothing reactor
Output end, the smoothing reactor the output end of the second winding connect respectively with the input terminal of the high-frequency inverter.
Optionally, the high-frequency inverter is the parallel resonance high-frequency inverter that double-T shaped topological inverter bridge is constituted.
Optionally, the power regulation device further includes the discharge circuit being composed in series by resistance and contactor, the electric discharge electricity
Road is connected in the output end of the three-phase bridge rectification circuit in parallel, when the main circuit switch disconnects, the discharge circuit
It discharges the filter capacitor.
The specific embodiment provided according to the present invention, the invention discloses following technical effects:
The present invention provides a kind of power regulation device of High Frequency Solid State induction heating power, the power regulation device and high-frequency inversion
Device connection, the power regulation device includes major loop control unit, AC/DC conversion module, current-limiting reactor, DC/DC conversion module；
The AC/DC conversion module is made of three-phase bridge rectification circuit；The DC/DC conversion module includes that filter capacitor, bridge-type are inverse
Power transformation road, high frequency transformer, rectification circuit；The high frequency transformer is step-down transformer；Three-phase alternating current is returned by the master
The QM that is spaced apart in the control unit of road is closed into the three-phase bridge rectification circuit；The output end of the three-phase bridge rectification circuit
Positive and negative electrode pass through the current-limiting reactor respectively and connect with the positive and negative electrode of the input terminal of the filter capacitor；The bridge-type is inverse
Power transformation road is in parallel with the filter capacitor；The first winding of the output end of the bridge inverter main circuit and the high frequency transformer connects
It connects；The secondary winding of the high frequency transformer is connect with the input terminal of the rectification circuit；The output end of the rectification circuit with
The input terminal of the high-frequency inverter connects；The output end of the high-frequency inverter and load connect；By controlling bridge type inverse
The turn-on time of switch element in circuit controls the output voltage duty ratio of bridge inverter main circuit, defeated to adjust rectification circuit
DC voltage out solves traditional use by silicon-controlled (brilliant to realize the adjusting to the output power of high-frequency inverter
Brake tube) constitute three-phase full-controlled rectifier bridge circuit carry out Power Regulation present in power factor it is low, it is serious to harmonic pollution in electric power net, adopt
With power frequency triphase step-down transformer decompression volume is big, low efficiency, it is at high cost the problems such as.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the electrical principle block diagram of the power regulation device in High Frequency Solid State induction heating power of the embodiment of the present invention；
Fig. 2 is that high frequency transformer of the embodiment of the present invention is the downconverter with a first winding, two secondary windings
The main circuit electrical schematic diagram of power regulation device when device in High Frequency Solid State induction heating power；
Fig. 3 be high frequency transformer of the embodiment of the present invention be with a first winding, Intermediate Gray tap it is secondary around
The main circuit electrical schematic diagram of power regulation device when the step-down transformer of group in High Frequency Solid State induction heating power；
Fig. 4 is that the embodiment of the present invention needs to increase exponentially the output current capacity of DC/DC converter and high frequency transformer is
With a first winding, two secondary windings step-down transformer when High Frequency Solid State induction heating power in power regulation device
Main circuit electrical schematic diagram；
Fig. 5 is that the embodiment of the present invention needs to increase exponentially the output current capacity of DC/DC converter and high frequency transformer is
With a first winding, the secondary winding of Intermediate Gray tap step-down transformer when High Frequency Solid State induction heating power in
Power regulation device main circuit electrical schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of power regulation devices of High Frequency Solid State induction heating power, solve traditional use
The three-phase full-controlled rectifier bridge circuit that is made of silicon-controlled (thyristor) carry out power factor present in Power Regulation it is low, to mains by harmonics
It is seriously polluted, using power frequency triphase step-down transformer decompression volume big, low efficiency, it is at high cost the problems such as.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Fig. 1 is the electrical principle block diagram of the power regulation device in High Frequency Solid State induction heating power of the embodiment of the present invention；Fig. 2 is
High frequency transformer of the embodiment of the present invention be with a first winding, two secondary windings step-down transformer when High Frequency Solid State sense
Answer the main circuit electrical schematic diagram of the power regulation device in heating power supply；Fig. 3 is that high frequency transformer of the embodiment of the present invention is with one
A first winding, the secondary winding of Intermediate Gray tap step-down transformer when High Frequency Solid State induction heating power in Power Regulation
The main circuit electrical schematic diagram of device.
Referring to Fig. 1-3, the power regulation device of High Frequency Solid State induction heating power provided in an embodiment of the present invention passes through flat wave electricity
Anti- device 9 is connect with high-frequency inverter 10；The power regulation device include 1, AC/DC conversion module of a major loop control unit,
One smoothing reactor 9 of DC/DC conversion module 12, one of current-limiting reactor 3, one；The AC/DC conversion module is complete by three-phase
Bridge rectification circuit 2 is constituted；The DC/DC conversion module includes filter capacitor 4, bridge inverter main circuit 5, high frequency transformer 6, rectification
Circuit 7.
The major loop control unit 1 mainly includes being spaced apart QM, A.C. contactor KM, and there are also 3 on three-phase power line
Current transformer, the effect for the electric current that current transformer is exported is on the one hand to be used as current feedback, another to function as
Flow the signal of protection.
The current-limiting reactor 3 includes the first winding L1-1 and the second winding L1-2；The high frequency transformer 6 is that decompression becomes
Depressor；The smoothing reactor 9 includes the first winding Ld-1 and the second winding Ld-2.
When being spaced apart QM closure, it is whole that three-phase alternating current is input to the three phase full bridge in the major loop control unit 1
In current circuit 2；The positive and negative electrode of the output end of the three-phase bridge rectification circuit 2 pass through respectively the current-limiting reactor 3 with it is described
The positive and negative electrode of the input terminal of filter capacitor 4 connects.The anode of the output end of the specially described three-phase bridge rectification circuit 2 passes through
The first winding L1-1 is connect with the anode of the input terminal of the filter capacitor 4；The output of the three-phase bridge rectification circuit 2
The cathode at end is connect by the second winding L1-2 with the cathode of the input terminal of the filter capacitor 4.
The bridge inverter main circuit 5 is in parallel with the filter capacitor 4；The output end of the bridge inverter main circuit 5 with it is described
The first winding of high frequency transformer 6 connects；The input terminal of the secondary winding of the high frequency transformer 6 and the rectification circuit 7 connects
It connects, the output end of the rectification circuit 7 is connect with by smoothing reactor 9 with the input terminal of the high-frequency inverter 10；It is described
The output end of high-frequency inverter 10 and load connect.
As shown in Fig. 2, when the high frequency transformer 6 is the downconverter with a first winding, two secondary windings
When device, the rectification circuit 7 is bridge rectifier, and the bridge rectifier is by two bridges independent and that output end is in parallel
Formula commutation sub-circuit is constituted, the secondary winding of the high frequency transformer 6 and the bridge rectifier sub-circuit of the bridge rectifier
Input terminal connect one to one that (secondary winding of the high frequency transformer 6 connects a bridge rectifier sub-circuit, described
Another secondary winding of high frequency transformer 6 connects another bridge rectifier sub-circuit)；The output end of the bridge rectifier
Anode connect with the input terminal of the first winding Ld-1 of the smoothing reactor 9, the output end of the bridge rectifier
Cathode is connect with the input terminal of the second winding Ld-2 of the smoothing reactor 9, the first winding Ld- of the smoothing reactor 9
1, the output end of the second winding Ld-2 is connect with the input terminal of the high-frequency inverter 10 respectively, the high-frequency inverter 10 it is defeated
Outlet and load connect.Wherein, each independent bridge rectifier sub-circuit is by bridge rectifier module composition or by half
Bridge rectification circuit module composition is connected and composed by independent diode element.
As shown in figure 3, when the high frequency transformer 6 is with a first winding, an Intermediate Gray tap secondary winding
Step-down transformer when, the rectification circuit 7 is full-wave rectifying circuit, which is made of two diodes, two
The parallel connected end of the cathode of Zhi Suoshu diode is the anode of the full-wave rectifying circuit output end；The intermediate of the secondary winding is taken out
Head is the cathode of the full-wave rectifying circuit output end.
The both ends of the secondary winding of the high frequency transformer 6 connect with the anode of the diode of the full-wave rectifying circuit respectively
Connect that (one end of the secondary winding of the high frequency transformer 6 connects the anode of a diode of the full-wave rectifying circuit, described
The other end of the secondary winding of high frequency transformer 6 connects the anode of another diode of the full-wave rectifying circuit)；It is described complete
The anode of the output end of wave rectification circuit is connect with the input terminal of the first winding Ld-1 of the smoothing reactor 9, the high frequency
The centre tap of the secondary winding of transformer 6 is connect with the input terminal of the second winding Ld-2 of the smoothing reactor 9, described flat
First winding Ld-1 of wave reactor 9, the output end of the second winding Ld-2 connect with the input terminal of the high-frequency inverter 10 respectively
It connects, the output end of the high-frequency inverter 10 and load connect.
Preferably, the high-frequency inverter 10 is the parallel resonance high-frequency inverter that double-T shaped topological inverter bridge is constituted.
When needing to increase exponentially output current capacity, need for multiple DC/DC conversion modules 12 to be connected in parallel,
In this case, on each DC/DC conversion module 12 also needing that equalizing reactor 8 is arranged；The setting of equalizing reactor 8 exists
Between the rectification circuit 7 and the smoothing reactor 9.
As shown in figure 4, when the power regulation device is provided with multiple DC/DC conversion modules and the high frequency transformer 6
When for the step-down transformer of a first winding, two secondary windings, before the first winding of the high frequency transformer 6
Connection relationship is constant, and the rectification circuit 7 is bridge rectifier, and the bridge rectifier is by two independent and output ends
Bridge rectifier sub-circuit in parallel is constituted, and the secondary winding of the high frequency transformer 6 and the bridge-type of the bridge rectifier are whole
The input terminal of stream sub-circuit connects one to one, and (secondary winding of the high frequency transformer 6 connects bridge rectifier
Circuit, another secondary winding of the high frequency transformer 6 connect another bridge rectifier sub-circuit)；The bridge rectifier electricity
The anode of the output end on road is connected by the input terminal of the equalizing reactor 8 and the first winding Ld-1 of the smoothing reactor 9
It connecing, the cathode of the output end of the bridge rectifier is connect with the input terminal of the second winding Ld-2 of the smoothing reactor 9,
The first winding Ld-1, the output end of the second winding Ld-2 of the smoothing reactor 9 are defeated with the high-frequency inverter 10 respectively
Enter end connection, the output end of the high-frequency inverter 10 and load connect.
As shown in figure 5, when the power regulation device is provided with multiple DC/DC conversion modules and the high frequency transformer 6
When to have the step-down transformer of intermediate tap secondary winding with a first winding, one, the high frequency transformer 6
Connection relationship before first winding is constant, and 7 rectification circuit is full-wave rectifying circuit, and the full-wave rectifying circuit is by two two
Grade pipe is constituted, and the parallel connected end of the cathode of two diodes is the anode of the full-wave rectifying circuit output end；It is described secondary
The centre tap of winding is the cathode of the full-wave rectifying circuit output end.
The both ends of the secondary winding of the high frequency transformer 6 input terminal with the diode of the full-wave rectifying circuit respectively
(one end of the secondary winding of the high frequency transformer 6 connects the anode of a diode of the full-wave rectifying circuit, institute for connection
State the secondary winding of high frequency transformer 6 the other end connect the full-wave rectifying circuit another diode anode)；It is described
The first winding Ld-1 that the anode of the output end of full-wave rectifying circuit passes through the equalizing reactor 8 and the smoothing reactor 9
Input terminal connection, the second winding of the centre tap of the secondary winding of the high frequency transformer 6 and the smoothing reactor 9
The input terminal of Ld-2 connects, the first winding Ld-1 of the smoothing reactor 9, the second winding Ld-2 output end respectively with it is described
The input terminal of high-frequency inverter 10 connects, and the output end of the high-frequency inverter 10 and load connect.
The bridge inverter main circuit is controlled by controlling the turn-on time of the switch element in the bridge inverter main circuit 5
5 output voltage duty ratio, to adjust the DC voltage that the rectification circuit 7 exports, to realize to the high-frequency inverter
The adjusting of 10 output power.
The three-phase bridge rectification circuit 2 is used to three-phase alternating current being rectified into pulsating dc voltage.
The three-phase bridge rectification circuit 2 is made of diode or rectification module；
The current-limiting reactor 3 is for limiting the output current changing rate of the three-phase bridge rectification circuit 2.
The filter capacitor 4 is used to for the pulsating dc voltage of the three-phase bridge rectification circuit 2 rectification output being filtered into
Smooth DC voltage.
The filter capacitor 4 by electrolytic capacitor parallel connection group it is in parallel with equalizing resistance after it is in series again, or by thin-film capacitor
The shunt capacitance group of composition is constituted.
The bridge inverter main circuit 5 is used to convert high frequency for DC voltage smooth after the filter capacitor 4 filtering and hand over
Flow square-wave voltage.
The bridge inverter main circuit 5 includes four device for power switching, respectively the first device for power switching IG1, second
Device for power switching IG2, third device for power switching IG3 and the 4th device for power switching IG4；First device for power switching
IG1 and the 4th device for power switching IG4 connect to form the first branch, the second device for power switching IG2 and described
Three device for power switching IG3 connect to form second branch, and the first branch and the second branch are in parallel.
The first device for power switching IG1 and the 4th device for power switching IG4 be packaged together to be formed it is integrated
IGBT module, the second device for power switching IG2 and the third device for power switching IG3 be packaged together to be formed it is integrated
IGBT component module or the first device for power switching IG1, the second device for power switching IG2, the third power are opened
Close device IG3, the 4th device for power switching IG4 is independent IGBT component module respectively.
The bridge inverter main circuit 5 device for power switching IG1, IG2, IG3 and IG4 in addition to being made of, in bridge type inverse
The direct-flow input end of circuit 5 is connected in parallel to the first high frequency capacitance Ch1-1 and the second high frequency capacitance Ch1-2, for opening for power
The freewheeling diode for closing device provides alternating current path.
The bridge inverter main circuit 5 remove by device for power switching IG1, IG2, IG3, IG4 and the first high frequency capacitance Ch1-1,
Except second high frequency capacitance Ch1-2 composition, the both ends of each device for power switching are in parallel by resistance R and capacitor C series connection structure respectively
At RC resistance capaciting absorpting circuit, which is used to absorb the peak voltage at device for power switching both ends.
The high-frequency ac square-wave voltage that the high frequency transformer 6 is used to export the bridge inverter main circuit 5 is depressured
Processing.
The rectification circuit 7 is used to the high-frequency ac square-wave voltage after high frequency transformer decompression be rectified into pulsation straight
Galvanic electricity pressure.
The equalizing reactor 8 is used for when multiple 12 parallel connections of DC/DC conversion module are in application, to each DC/
The output electric current of DC conversion module 12 carries out stream operation.
The Rectified alternating current stream that the smoothing reactor 9 exports the rectification circuit 7 and the equalizing reactor 8 carries out
Filtering, and using filtered DC voltage as the straight of the parallel resonance high-frequency inverter 10 being made of double-T shaped topological inverter bridge
Flow input power.
Preferably, the power regulation device further includes the discharge circuit 13 being composed in series by resistance RX and contactor KM2, described
Discharge circuit 13 is connected in the output end of the three-phase bridge rectification circuit 2 in parallel, and when the disconnection of the main circuit switch 1, institute
Discharge circuit 13 is stated to discharge to the filter capacitor 4.
Preferably, the power regulation device further includes control terminal；The control terminal and bridge inverter main circuit 5, high-frequency inverter
10 two-way communications；The major loop control unit 1 controls the start and stop of the control terminal.
The Power Regulation principle of power regulation device provided by the invention are as follows: by changing the switch member in the bridge inverter main circuit 5
The turn-on time of part realizes the control to 5 output voltage duty ratio of bridge inverter main circuit, to realize to the rectification circuit 7
The height of output DC voltage is adjusted, and the output power of high-frequency inverter 10 is adjusted to realize.
Power Regulation is carried out in High Frequency Solid State induction heating power based on AC/DC/DC converter the invention discloses a kind of
Device provides the principle and topology diagram of major loop.Power regulation device provided in an embodiment of the present invention includes by diode structure
At three-phase bridge rectification circuit, current-limiting reactor, the filter capacitor being made of capacitance component, the bridge-type being made of IGBT element
Inverter circuit, the high frequency transformer with buck functionality, rectification circuit and equalizing reactor.The present invention is applied to be opened up by double-T shaped
It flutters in the High Frequency Solid State induction heating power for the parallel resonance high-frequency inverter that inverter bridge is constituted, solves major loop three-phase work
Frequency step-down transformer volume is big, low efficiency, it is low using Thyristor Three-phase full-controlled rectifier bridge Power Regulation power factor, to mains by harmonics dirt
The problems such as dye is big and filter capacitor is complicated improves power factor and efficiency, realizes energy conservation, reduces to the humorous of power grid
Wave pollution, the volume for reducing power-supply device.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (10)
1. a kind of power regulation device of High Frequency Solid State induction heating power, which is characterized in that the power regulation device and high-frequency inverter
Connection；The power regulation device includes major loop control unit, AC/DC conversion module, current-limiting reactor, DC/DC conversion module；Institute
AC/DC conversion module is stated to be made of three-phase bridge rectification circuit；The DC/DC conversion module includes filter capacitor, bridge type inverse
Circuit, high frequency transformer, rectification circuit；The high frequency transformer is step-down transformer；
Three-phase alternating current is closed into the three-phase bridge rectification circuit by the major loop control unit hollow opening QM；It is described
The positive and negative electrode of the output end of three-phase bridge rectification circuit passes through the input terminal of the current-limiting reactor Yu the filter capacitor respectively
Positive and negative electrode connection；The bridge inverter main circuit is in parallel with the filter capacitor；The output end of the bridge inverter main circuit and institute
State the first winding connection of high frequency transformer；The input terminal of the secondary winding of the high frequency transformer and the rectification circuit connects
It connects；The output end of the rectification circuit is connect with the input terminal of the high-frequency inverter；The output end of the high-frequency inverter with
Load connection；
The defeated of the bridge inverter main circuit is controlled by controlling the turn-on time of the switch element in the bridge inverter main circuit
Voltage duty cycle out, to adjust the DC voltage of the rectification circuit output, to realize the output to the high-frequency inverter
The adjusting of power.
2. power regulation device according to claim 1, which is characterized in that the three-phase bridge rectification circuit is used for three intersections
Galvanic electricity is rectified into pulsating dc voltage；The three-phase bridge rectification circuit is made of diode or rectification module；
The current changing rate that the current-limiting reactor is used to export the three-phase bridge rectification circuit limits；The current limliting
Reactor includes the first winding and the second winding；The anode of the output end of the three-phase bridge rectification circuit passes through the current limliting electricity
First winding of anti-device is connect with the anode of the input terminal of the filter capacitor；The output end of the three-phase bridge rectification circuit
Cathode is connect by the second winding of the current-limiting reactor with the cathode of the input terminal of the filter capacitor；
The filter capacitor is used to for the pulsating dc voltage of three-phase bridge rectification circuit rectification output being filtered into smooth
DC voltage；
The filter capacitor by electrolytic capacitor parallel connection group it is in parallel with equalizing resistance after it is in series again or be made of thin-film capacitor
Shunt capacitance group constitute.
3. power regulation device according to claim 1, which is characterized in that the bridge inverter main circuit is used for the filtered electrical
Smooth DC voltage is converted into high-frequency ac square-wave voltage after capacitor filter；The bridge inverter main circuit includes four power switch
Device, respectively the first device for power switching, the second device for power switching, third device for power switching and the 4th power switch device
Part；First device for power switching and the 4th power switching device series form the first branch, and second power is opened
It closes device and the third power switching device series forms second branch, and the first branch and the second branch are simultaneously
Connection；
Wherein, first device for power switching and the 4th device for power switching are packaged together to form integrated IGBT member
Part module, second device for power switching and the third device for power switching are packaged together to form integrated IGBT element
It is module or first device for power switching, second device for power switching, the third device for power switching, described
4th device for power switching is independent IGBT component module respectively.
4. power regulation device according to claim 3, which is characterized in that the bridge inverter main circuit further includes the first high-frequency electrical
Appearance, the second high frequency capacitance, by resistance and capacitor RC resistance capaciting absorpting circuit in series；First high frequency capacitance, described
Two high frequency capacitances are connected in parallel on the direct-flow input end of the bridge inverter main circuit, first high frequency capacitance, second high frequency
Capacitor is used to provide alternating current path for the freewheeling diode of the device for power switching；The RC resistance capaciting absorpting circuit is connected in parallel on often
On a device for power switching, the RC resistance capaciting absorpting circuit is used to absorb the spike electricity at the device for power switching both ends
Pressure.
5. power regulation device according to claim 1, which is characterized in that the output end of the rectification circuit passes through flat wave reactance
Device is connect with the input terminal of the high-frequency inverter；The smoothing reactor includes the first winding and the second winding；
The anode of the output end of the rectification circuit is connect with the input terminal of the first winding of the smoothing reactor, the rectification
The cathode of the output end of circuit is connect with the input terminal of the second winding of the smoothing reactor, and the first of the smoothing reactor
The output end of winding, the smoothing reactor the second winding output end respectively with the input terminal of the high-frequency inverter connect
It connects；
The smoothing reactor is filtered the Rectified alternating current stream that the rectification circuit exports.
6. power regulation device according to claim 5, which is characterized in that, will when needing to increase exponentially output current capacity
Multiple DC/DC conversion modules are connected in parallel, and it is anti-also to need to be arranged equal galvanic electricity on each DC/DC conversion module
Device；The equalizing reactor is arranged between the rectification circuit and the smoothing reactor；The equalizing reactor is for working as
Multiple DC/DC conversion module parallel connections are in application, flow the output electric current of each DC/DC conversion module.
7. power regulation device according to claim 6, which is characterized in that the high frequency transformer is used for the bridge type inverse
The high-frequency ac square-wave voltage of circuit output carries out decompression processing；The rectification circuit is used for after high frequency transformer decompression
High-frequency ac square-wave voltage be rectified into pulsating dc voltage；
The high frequency transformer is the step-down transformer with a first winding, two secondary windings；The rectification circuit is
Bridge rectifier；The bridge rectifier is made of two bridge rectifier sub-circuits independent and that output end is in parallel；Often
A independent bridge rectifier sub-circuit constituted by bridge rectifier module composition or by Half bridge rectifier circuit module or
It is connected and composed by independent diode element；
When the power regulation device is provided with a DC/DC conversion module, the secondary winding of the high frequency transformer is distinguished
It connects one to one with the input terminal of the bridge rectifier sub-circuit in the bridge rectifier；The bridge rectifier it is defeated
The anode of outlet is connect with the input terminal of the first winding of the smoothing reactor, and the output end of the bridge rectifier is born
Pole is connect with the input terminal of the second winding of the smoothing reactor；
When the power regulation device is provided with multiple DC/DC conversion modules, the secondary winding of the high frequency transformer is distinguished
It connects one to one with the input terminal of the bridge rectifier sub-circuit in the bridge rectifier；The bridge rectifier it is defeated
The anode of outlet is connect by the equalizing reactor with the input terminal of the first winding of the smoothing reactor, and the bridge-type is whole
The cathode of the output end of current circuit is connect with the input terminal of the second winding of the smoothing reactor.
8. power regulation device according to claim 6, which is characterized in that the high frequency transformer is used for the bridge type inverse
The high-frequency ac square-wave voltage of circuit output carries out decompression processing；The rectification circuit is used for after high frequency transformer decompression
High-frequency ac square-wave voltage be rectified into pulsating dc voltage；
The high frequency transformer is the step-down transformer with a first winding, the secondary winding of Intermediate Gray tap；Institute
Stating rectification circuit is full-wave rectifying circuit；The full-wave rectifying circuit is made of two diodes；Two diodes it is negative
The parallel connected end of pole is the anode of the full-wave rectifying circuit output end；The centre tap of the secondary winding is the full-wave rectification
The cathode of circuit output end；
When the power regulation device is provided with a DC/DC conversion module, the two of the secondary winding of the high frequency transformer
End is connect with the anode of the diode of the full-wave rectifying circuit respectively；The anode of the output end of the full-wave rectifying circuit and institute
The input terminal connection of the first winding of smoothing reactor is stated, the centre tap of the secondary winding of the high frequency transformer is put down with described
The input terminal of second winding of wave reactor connects；The output end of first winding of the smoothing reactor, the flat wave reactance
The output end of second winding of device is connect with the input terminal of the high-frequency inverter respectively；
When the power regulation device is provided with multiple DC/DC conversion modules, the two of the secondary winding of the high frequency transformer
End is connect with the anode of the diode of the full-wave rectifying circuit respectively；The anode of the output end of the full-wave rectifying circuit passes through
The equalizing reactor is connect with the input terminal of the first winding of the smoothing reactor, the secondary winding of the high frequency transformer
Centre tap connect with the input terminal of the second winding of the smoothing reactor；First winding of the smoothing reactor it is defeated
Outlet, the smoothing reactor the output end of the second winding connect respectively with the input terminal of the high-frequency inverter.
9. power regulation device according to claim 1, which is characterized in that the high-frequency inverter is double-T shaped topological inverter bridge
The parallel resonance high-frequency inverter of composition.
10. power regulation device according to claim 1, which is characterized in that the power regulation device further includes by resistance and contact
The discharge circuit that device is composed in series, the discharge circuit are connected in the output end of the three-phase bridge rectification circuit in parallel, work as institute
When stating main circuit switch disconnection, the discharge circuit discharges to the filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811424272.9A CN109327147A (en) | 2018-11-27 | 2018-11-27 | A kind of power regulation device of High Frequency Solid State induction heating power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811424272.9A CN109327147A (en) | 2018-11-27 | 2018-11-27 | A kind of power regulation device of High Frequency Solid State induction heating power |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110444371A (en) * | 2019-07-17 | 2019-11-12 | 孙崇山 | Wire current contrary distribution core type smoothing reactor |
| CN110676840A (en) * | 2019-08-30 | 2020-01-10 | 合肥学院 | Power system control equipment and power system control method |
| CN112271942A (en) * | 2020-11-06 | 2021-01-26 | 上海绿巨人爱爵能源科技有限公司 | Ultra-high power low-harmonic high-power-factor high-frequency switching power supply topology |
| CN112532082A (en) * | 2020-11-26 | 2021-03-19 | 核工业西南物理研究院 | High-frequency converter applied to PSM high-voltage power supply and PSM high-voltage power supply |
-
2018
- 2018-11-27 CN CN201811424272.9A patent/CN109327147A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110444371A (en) * | 2019-07-17 | 2019-11-12 | 孙崇山 | Wire current contrary distribution core type smoothing reactor |
| CN110676840A (en) * | 2019-08-30 | 2020-01-10 | 合肥学院 | Power system control equipment and power system control method |
| CN112271942A (en) * | 2020-11-06 | 2021-01-26 | 上海绿巨人爱爵能源科技有限公司 | Ultra-high power low-harmonic high-power-factor high-frequency switching power supply topology |
| CN112532082A (en) * | 2020-11-26 | 2021-03-19 | 核工业西南物理研究院 | High-frequency converter applied to PSM high-voltage power supply and PSM high-voltage power supply |
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