CN207573240U - A kind of electric precipitator high frequency electric source - Google Patents
A kind of electric precipitator high frequency electric source Download PDFInfo
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- CN207573240U CN207573240U CN201721278550.5U CN201721278550U CN207573240U CN 207573240 U CN207573240 U CN 207573240U CN 201721278550 U CN201721278550 U CN 201721278550U CN 207573240 U CN207573240 U CN 207573240U
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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
Abstract
The utility model discloses a kind of electric precipitator high frequency electric sources, including major loop, control loop and rectification module, three phase worker power is rectified into the DC power supply of 510V by the major loop, the DC power supply of 510V is converted into AC power by being provided with full-bridge series resonance module, DC high-voltage power supply through rectification module rectifying and wave-filtering into 72KV after boosting is powered electric precipitator, the full-bridge series resonance module is by IGBT bridge-type inverters, resonant inductance, resonant capacitance, high frequency transformer is connected in turn, the IGBT bridge-type inverters are connected with buffer circuit.A kind of electric precipitator high frequency electric source of the utility model, by being coupled with buffer circuit on IGBT bridge-type inverters, to ensure power device trouble free service.
Description
Technical field
The utility model is related to electric precipitation power supply unit technical field, more specifically, it relates to which a kind of electric precipitator is high
Frequency power.
Background technology
Electric precipitator is widely used in the environmental protection machinery for administering exhaust gas and dust of the industries such as cement, electric power, metallurgy, right
The improvement of exhaust gas and dust has very significant effect.The basic functional principle of electric precipitator is：It is differed in two radius of curvature
Bigger metal anode and cathode（A pair of electrodes）On, by high voltage direct current, maintain one and be enough to make the quiet of gas ionization
Electric field makes the electronics, anion and cation generated after gas ionization, adsorbs on the dust by electric field, so as to make dust
Obtain charge（Dust charged）；Charged just moves, and sink under the action of electric field to the electric field opposite with its polarity of electrode
It accumulates on electric field to achieve the purpose that the gentle separation of dust；And the dust stratification on electrode, through rapping, to unload ash, deashing sheet external, then passes through
Ash-transmission system is transported to grey field or convenient in the device using storage, purified gas is just arranged from the chimney matched
It removes, is diffused into air.
With the raising of environmental requirement, efficiency of dust collection and energy-saving run to electric precipitator propose higher requirement,
The design of the high voltage power supply of core has received widespread attention.Initial electric precipitator uses power frequency thyristor supply, is working as dust
Specific resistance is higher, when easily there is back corona phenomenon, and dust removing effects can be decreased obviously, and typically up to be referred to less than former Design of Electrostatic Precipitator
Mark and environmental emission standard.
A kind of electrostatic precipitation high frequency electric source control system, skill disclosed in the Chinese patent of Publication No. CN202475292U
Art main points are：Including major loop, control loop and rectification module, the major loop is by breaker, contactor, three-phase filtered electrical
Sense, three-phase filter capacitor, three-phase commutation bridge, filter inductance, filter capacitor are connected in turn, and major loop is by three phase worker power
The DC power supply of 510V is rectified into, which is converted into AC power by full-bridge series resonance module, through whole after boosting
The DC high-voltage power supply of flow module rectifying and wave-filtering into 72KV are powered to electric precipitator；The full-bridge series resonance module is by IGBT bridges
Formula inverter, resonant inductance, resonant capacitance, high frequency transformer are connected in turn.
Solve the problems, such as the decline of electric precipitator dust removing effects in said program, but when the direct current of IGBT bridge-type inverters
When the side unreasonable or operating current of wiring is larger, shutdown peak voltage can be more than the rated voltage of power device, cause device
Damage.
Therefore it needs to propose a kind of new scheme to solve the problems, such as this.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of electric precipitator high frequency electric source,
By being coupled with buffer circuit on IGBT bridge-type inverters, to ensure power device trouble free service.
The above-mentioned technical purpose of the utility model technical scheme is that：A kind of electric precipitator high frequency
Power supply, including major loop, control loop and rectification module, three phase worker power is rectified into the direct current of 510V by the major loop
Source, the DC power supply of 510V is converted into AC power by being provided with full-bridge series resonance module, whole through rectification module after boosting
The DC high-voltage power supply that stream is filtered into 72KV is powered electric precipitator, and the full-bridge series resonance module is inverse by IGBT bridge-types
Become device, resonant inductance, resonant capacitance, high frequency transformer to be connected in turn, the IGBT bridge-type inverters are connected with buffering electricity
Road.
By using above-mentioned technical proposal, the switching frequency height of IGBT bridge-type inverters can cause dynamic loss larger, and
And the stray inductance of distribution in circuit can generate instantaneous overvoltage on power device, its amplitude and stray electrical sensibility reciprocal, electricity
It is directly proportional to flow rate of descent；When the unreasonable or operating current of DC side wiring of IGBT bridge-type inverters is larger, spike is turned off
Voltage can be more than the rated voltage of power device, cause device failure；Therefore to ensure power device trouble free service, in IGBT bridge-types
Buffer circuit is coupled on inverter.
The utility model is further arranged to：The IGBT bridge-type inverters include four IGBT insulated gates of bridge-type connection
Bipolar transistor, IGBT igbt Q1, collector are coupled to one end of major loop, and emitter is coupled to high frequency
Transformer primary side；IGBT igbt Q3, collector are coupled to IGBT igbts Q1 transmittings
Pole and the tie point of high frequency transformer primary side, emitter are coupled to the other end of major loop；IGBT igbts
Q2, collector are coupled to the tie point of IGBT igbt Q1 collectors and major loop one end, emitter coupling
In resonant inductance；IGBT igbt Q4, collector are coupled to IGBT igbt Q2 emitters
With the tie point of resonant inductance, emitter is coupled to the company of IGBT igbt Q3 emitters and the major loop other end
Contact.
The utility model is further arranged to：The buffer circuit includes, and the first buffering capacitance, one end is coupled to IGBT
The collector of igbt Q1, the other end are coupled to the emitter of IGBT igbts Q3；Second is slow
Capacitance is rushed, one end is coupled to the collector of IGBT igbts Q2, and the other end is coupled to IGBT insulated gate bipolars
The emitter of transistor Q4.
By using above-mentioned technical proposal, the voltage between the emitter and collector of IGBT igbts
During more than direct current power source voltage, start the buffer circuit, buffer capacitance by first, the second buffering capacitance eventually arrives at value control
Pressure voltage between the emitter and collector of IGBT igbts is hereinafter, and should select high frequency characteristics good
Capacitance（Thin film capacitor etc.）.
The utility model is further arranged to：The buffer circuit includes the third buffering capacitance of series connection and third buffering two
Pole pipe, the 4th buffering capacitance of series connection and the 4th buffering diode, the 5th buffering capacitance of series connection and the 5th buffering diode, string
6th buffering capacitance of connection and the 6th buffering diode, one end of the third buffering capacitance are coupled to IGBT insulated gate bipolars crystalline substance
The collector of body pipe Q1, the cathode of the third buffering diode are coupled to the emitter of IGBT igbts Q1；
One end of the 4th buffering capacitance is coupled to the emitter of IGBT igbts Q3, the 4th buffering diode
Anode be coupled to the collector of IGBT igbts Q3；It is exhausted that one end of the 5th buffering capacitance is coupled to IGBT
The collector of edge grid bipolar transistor Q2, the cathode of the 5th buffering diode are coupled to IGBT igbts Q2
Emitter；One end of the 6th buffering capacitance is coupled to the emitter of IGBT igbts Q4, and the described 6th
The anode of buffering diode is coupled to the collector of IGBT igbts Q4.
By using above-mentioned technical proposal, the voltage between the emitter and collector of IGBT igbts
During more than direct current power source voltage, start the buffer circuit；The value that eventually arrives at for buffering capacitance is controlled in IGBT insulated gate bipolars
Below pressure voltage between the emitter and collector of transistor；And the transient state forward voltage decline of buffering diode is when being off
One of the reason of peak voltage occurs, once the reverse recovery time of buffering diode lengthens, when high frequency switching motion, buffers two
Pole pipe generate loss just become larger, the Reverse recovery of buffering diode drastically, and buffering diode Reverse recovery action when
Voltage between the emitter and collector of IGBT igbts sharp significantly vibrates, therefore need to select transient state just
Low to voltage, reverse recovery time is short, the diode of Reverse recovery smooth-going.
The utility model is further arranged to：The buffer circuit further includes, and the first buffer resistance, one end is coupled to third
The tie point of the capacitance other end and third buffering diode anode is buffered, the other end is coupled to IGBT igbts Q3
The tie point of one end of emitter and the 4th buffering capacitance；Second buffer resistance, one end are coupled to the 4th buffering capacitance other end
With the tie point of the 4th buffering diode cathode, the other end is coupled to IGBT igbt Q1 collectors and delays with third
Rush the tie point of one end of capacitance；Third buffer resistance, one end are coupled to the 5th buffering capacitance other end and the 5th two poles of buffering
The tie point of tube anode, the other end are coupled to one end of IGBT igbt Q4 emitters and the 6th buffering capacitance
Tie point；4th buffer resistance, one end are coupled to the tie point of the 6th buffering capacitance other end and the 6th buffering diode cathode,
The other end is coupled to the tie point of one end of IGBT igbt Q2 collectors and the 5th buffering capacitance.
By using above-mentioned technical proposal, buffer resistance is acted in the shutdown next time of IGBT igbts
Before progress, the charge discharge in buffering capacitance will be stored in.
The utility model is further arranged to：The buffer circuit includes the 7th buffering capacitance and the 5th buffering electricity of series connection
Resistance, the 8th buffering capacitance of series connection and the 6th buffer resistance, the 9th buffering capacitance of series connection and the 7th buffer resistance, the of series connection
Ten buffering capacitances and the 8th buffer resistance, one end of the 7th buffering capacitance are coupled to IGBT igbts Q1's
Collector, one end of the 5th buffer resistance are coupled to the emitter of IGBT igbts Q1；Described 8th is slow
The one end for rushing capacitance is coupled to the emitter of IGBT igbts Q3, and one end of the 6th buffer resistance is coupled to
The collector of IGBT igbts Q3；One end of the 9th buffering capacitance is coupled to IGBT insulated gate bipolar transistors
The collector of pipe Q2, one end of the 7th buffer resistance are coupled to the emitter of IGBT igbts Q2；It is described
One end of tenth buffering capacitance is coupled to the emitter of IGBT igbts Q4, one end of the 8th buffer resistance
It is coupled to the collector of IGBT igbts Q4.
By using above-mentioned technical proposal, it can effectively inhibit high peak voltage.
The utility model is further arranged to：The major loop is mainly by breaker, contactor, three-phase commutation bridge, filtering
Inductance, filter capacitor are connected in sequence, and resistance is parallel on the contactor.
By using above-mentioned technical proposal, it is parallel with resistance on the contactor, to play the role of buffering.
The utility model is further arranged to：Connect between phase line two-by-two between the contactor and three-phase commutation bridge
It is connected to varistor.
By using above-mentioned technical proposal, varistor is exactly that high-impedance state is presented under normal circumstances, more than threshold value it
After short-circuit condition is presented, then short-circuit between two phase lines, burn-up is arranged on the fuse of front, to play protection circuit below
Effect, prevents high pressure from making circuit on fire.
The utility model is further arranged to：The control loop includes IGBT driving board, sample connection circuit, number letter
Number processing controller, described IGBT driving board one end are connected with IGBT bridge-type inverters, and the other end is controlled with Digital Signal Processing
Device is connected, and the Digital Signal Processing controller drives IGBT bridge-type inverters by IGBT driving board.
The utility model is further arranged to：The rectification module includes the hf rectifier of high-frequency and high-voltage silicon stack composition.
In conclusion the utility model has the advantages that：If the switching frequency height of IGBT bridge-type inverters can draw
It is larger to play dynamic loss, and be distributed stray inductance in circuit to generate instantaneous overvoltage on power device, its width
Value is directly proportional with stray electrical sensibility reciprocal, current reduction ratio；When the DC side wiring of IGBT bridge-type inverters is unreasonable or work electricity
When flowing larger, shutdown peak voltage can be more than the rated voltage of power device, cause device failure；Therefore in IGBT bridge-type inverters
On be coupled with buffer circuit, to ensure that power device can be with trouble free service.
Description of the drawings
Fig. 1 is the circuit diagram of the present embodiment one；
Fig. 2 is the IGBT bridge-type inverter circuit diagrams of the present embodiment two；
Fig. 3 is the IGBT bridge-type inverter circuit diagrams of the present embodiment three.
In figure：1st, major loop；2nd, full-bridge series resonance module；21st, IGBT bridge-type inverters；3rd, Digital Signal Processing controls
Device；4th, IGBT driving board.
Specific embodiment
With reference to the accompanying drawings and examples, the utility model is described in detail.
Embodiment one：A kind of electric precipitator high frequency electric source, as shown in Figure 1, including major loop 1, control loop and rectification mould
Block, major loop 1 are mainly sequentially connected by circuit breaker Q F, contactor KM, three-phase commutation bridge K1, filter inductance L1, filter capacitor C11
It forms；Three-phase 380V electric network sources input major loop 1, through circuit breaker Q F, contactor KM, three-phase commutation bridge K1, filter inductance L1,
510V stable DCs source is formed after filter capacitor C11；And resistance R10, R11, R12 are parallel on contactor KM, it plays
The effect of buffering；Then the DC power supply of 510V is converted into AC power by being provided with full-bridge series resonance module 2 and rises
Pressure, through rectification module rectifying and wave-filtering into the DC high-voltage power supply of 72KV after boosting, so as to be powered to electric precipitator.The full-bridge
Cascade coupled resonator modules 2 be sequentially connected by IGBT bridge-type inverters 21, resonant inductance Lr, resonant capacitance Cr, high frequency transformer TM and
Into being connected with buffer circuit in IGBT bridge-type inverters 21.Therein, rectification module includes the height of high-frequency and high-voltage silicon stack composition
Frequency rectifier.
If the switching frequency height of IGBT bridge-type inverters 21 can cause dynamic loss larger, and be distributed in circuit miscellaneous
Scattered inductance can generate instantaneous overvoltage on power device, its amplitude and stray electrical sensibility reciprocal, current reduction ratio is directly proportional；When
When the unreasonable or operating current of DC side wiring of IGBT bridge-type inverters 21 is larger, shutdown peak voltage can be more than power device
The rated voltage of part, causes device failure；Therefore buffer circuit is coupled on IGBT bridge-type inverters 21, to ensure power device
It can be with trouble free service.
Wherein, IGBT bridge-type inverters 21 connected by four IGBT igbt Q1, Q2, Q3, Q4 bridge-types and
Into IGBT igbt Q1, collector is coupled to one end of major loop 1, and emitter is coupled to high frequency transformer
Primary side；IGBT igbt Q3, collector are coupled to IGBT igbt Q1 emitters and height
The tie point of frequency power transformer primary side, emitter are coupled to the other end of major loop 1；IGBT igbt Q2,
Collector is coupled to the tie point of IGBT igbt Q1 collectors and 1 one end of major loop, and emitter is coupled to humorous
Shake inductance；IGBT igbt Q4, collector be coupled to IGBT igbt Q2 emitters with it is humorous
Shake the tie point of inductance, and emitter is coupled to the connection of IGBT igbt Q3 emitters and 1 other end of major loop
Point.
The buffer circuit of the present embodiment includes, and the first buffering capacitance C1, one end is coupled to IGBT insulated gate bipolar transistors
The collector of pipe Q1, the other end are coupled to the emitter of IGBT igbts Q3；Second buffering capacitance C2, one end
The collector of IGBT igbts Q2 is coupled to, the other end is coupled to the transmitting of IGBT igbts Q4
Pole.
To protect circuit below, pressure is respectively connected between the phase line two-by-two between contactor KM and three-phase commutation bridge K1
Quick resistance RV；Varistor RV is exactly that high-impedance state is presented under normal circumstances, more than short-circuit condition is presented after threshold value, then
Short-circuit between two phase lines, burn-up is arranged on the fuse of front, to play the role of protection circuit below, prevents high pressure from making circuit
It is on fire.
Control loop includes IGBT driving board 4, sample connection circuit, Digital Signal Processing controller 3, IGBT driving board 4
One end is connected with IGBT bridge-type inverters 21, and the other end is connected with Digital Signal Processing controller 3, Digital Signal Processing controller
3 drive IGBT bridge-type inverters 21 by IGBT driving board.
Digital Signal Processing controller 3 is made of touch screen and digital control unit, is using the DSP of 32 as the special of core
Use controller；By controlling the booting touch key-press of touch screen, different calculations is pressed according to the operating mode of setting and control mode
Method determines the duty ratio of IGBT, and sends out corresponding timing value and start timer internal, and timing arrives, timer output IGBT
Trigger pulse directly drives IGBT igbts Q1, Q2, Q3, Q4 by IGBT driving board 4；IGBT bridge type inverses
The high frequency rectangular alternating current wave that device 21 is converted to the DC voltage of 510V 0 ~ 50KHz is sent to high frequency transformer TM, boosted
72KV high direct voltages are exported after rectifying and wave-filtering, are powered through damping resistance R9 power supplys to electric precipitator.Wherein, IGBT bridge-type inverters
21 reversals are as follows：Digital Signal Processing controller 3 controls IGBT igbt Q1, IGBT insulated gate bipolars
When transistor Q4 is connected, series resonance electric current is through IGBT igbts Q1, high frequency transformer TM, series resonant capacitance
Cr, series resonance inductor Lr, IGBT igbt Q4 charge to series resonant capacitance Cr, are forming sinusoidal current just
Half-wave reaches maximum value in capacitance voltage, after charging current is zero, trigger signal shutdown IGBT igbts Q1 and
IGBT igbt Q4, capacitance voltage are humorous through IGBT igbts Q4, series resonance inductor Lr, series connection
It shakes capacitance Cr, high frequency transformer TM, Q1 electric discharge, the negative half-wave of sinusoidal current is formed, after negative half-wave, because of IGBT insulated gates
Bipolar transistor Q1, IGBT igbt Q4 fails to be again turned on, loop current zero；Then IGBT insulated gates are double
Gated transistors Q2, IGBT igbt Q3 is connected, and series resonant capacitance Cr is inverted charging, the course of work with it is aforementioned
It is identical.
Embodiment two：A kind of electric precipitator high frequency electric source, as shown in Fig. 2, the difference from embodiment one is：Buffering electricity
Road includes third buffering capacitance C3 and third buffering diode D3, the 4th buffering capacitance C4 to connect and the 4th buffering two of series connection
Pole pipe D4, the 5th buffering capacitance C5 and the 5th buffering diode D5 to connect, the 6th buffering capacitance C6 to connect and the 6th buffering
One end of diode D6, third buffering capacitance C3 are coupled to the collector of IGBT igbts Q1, third buffering two
The cathode of pole pipe D3 is coupled to the emitter of IGBT igbts Q1；One end of 4th buffering capacitance C4 is coupled to
The emitter of IGBT igbts Q3, the anode of the 4th buffering diode D4 are coupled to IGBT insulated gate bipolar transistors
The collector of pipe Q3；One end of 5th buffering capacitance C5 is coupled to the collector of IGBT igbts Q2, and the 5th is slow
The cathode for rushing diode D5 is coupled to the emitter of IGBT igbts Q2；One end coupling of 6th buffering capacitance C6
In the emitter of IGBT igbts Q4, the anode of the 6th buffering diode D6 is coupled to IGBT insulated gate bipolars crystalline substance
The collector of body pipe Q4.
Buffer circuit further includes, the first buffer resistance R1, and one end is coupled to the third buffering capacitance C3 other ends and third is delayed
The tie point of diode D3 anodes is rushed, the other end is coupled to IGBT igbt Q3 emitters and the 4th buffering capacitance
The tie point of one end of C4；Second buffer resistance R2, one end are coupled to the 4th buffering capacitance C4 other ends and the 4th two poles of buffering
The tie point of pipe D4 cathodes, the other end are coupled to the one of IGBT igbt Q1 collectors and third buffering capacitance C3
The tie point at end；Third buffer resistance R3, one end are coupled to the 5th buffering capacitance C5 other ends and the 5th buffering diode D5 sun
The tie point of pole, the other end are coupled to the company of IGBT igbt Q4 emitters and one end of the 6th buffering capacitance C6
Contact；4th buffer resistance R4, one end are coupled to the company of the 6th buffering capacitance C6 other ends and the 6th buffering diode D6 cathodes
Contact, the other end are coupled to IGBT igbt Q2 collectors and the tie point of one end of the 5th buffering capacitance C5.
Embodiment three：A kind of electric precipitator high frequency electric source, as shown in figure 3, the difference from embodiment one is：Buffering electricity
Road includes the 7th buffering capacitance C7 and the 5th buffer resistance R5, the 8th buffering capacitance C8 and the 6th buffer resistance to connect of series connection
R6, the 9th the tenth buffering capacitance C10 and the 8th buffer resistance for buffering capacitance C9 and the 7th buffer resistance R7, connecting of series connection
One end of R8, the 7th buffering capacitance C7 are coupled to the collector of IGBT igbts Q1, the 5th buffer resistance R5's
One end is coupled to the emitter of IGBT igbts Q1；One end of 8th buffering capacitance C8 is coupled to IGBT insulated gates
The emitter of bipolar transistor Q3, one end of the 6th buffer resistance R6 are coupled to the current collection of IGBT igbts Q3
Pole；One end of 9th buffering capacitance C9 is coupled to the collector of IGBT igbts Q2, the 7th buffer resistance R7's
One end is coupled to the emitter of IGBT igbts Q2；One end of tenth buffering capacitance C10 is coupled to IGBT insulation
The emitter of grid bipolar transistor Q4, one end of the 8th buffer resistance R8 are coupled to the current collection of IGBT igbts Q4
Pole.
It the above is only the preferred embodiment of the utility model, the scope of protection of the utility model is not limited merely to above-mentioned
Embodiment, all technical solutions belonged under the utility model thinking belong to the scope of protection of the utility model.It should be pointed out that pair
For those skilled in the art, several improvements and modifications under the premise of the utility model principle is not departed from,
These improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of electric precipitator high frequency electric source, including major loop（1）, control loop and rectification module, the major loop（1）By three
Phase power frequency supply is rectified into the DC power supply of 510V, and the DC power supply of 510V is by being provided with full-bridge series resonance module（2）Turn
Changing AC power into, the DC high-voltage power supply through rectification module rectifying and wave-filtering into 72KV after boosting is powered electric precipitator,
It is characterized in that：The full-bridge series resonance module（2）By IGBT bridge-type inverters（21）, resonant inductance, resonant capacitance, high frequency
Transformer is connected in turn, the IGBT bridge-type inverters（21）It is connected with buffer circuit.
2. a kind of electric precipitator high frequency electric source according to claim 1, it is characterised in that：The IGBT bridge-type inverters
（21）Include four IGBT igbts of bridge-type connection（Q1, Q2, Q3, Q4）,
IGBT igbt Q1, collector are coupled to major loop（1）One end, emitter is coupled to high frequency transformation
Device primary side；
IGBT igbt Q3, collector are coupled to IGBT igbt Q1 emitters and become with high frequency
The tie point of depressor primary side, emitter are coupled to major loop（1）The other end；
IGBT igbt Q2, collector are coupled to IGBT igbt Q1 collectors and major loop
（1）The tie point of one end, emitter are coupled to resonant inductance；
IGBT igbt Q4, collector are coupled to IGBT igbt Q2 emitters and resonance electricity
The tie point of sense, emitter are coupled to IGBT igbt Q3 emitters and major loop（1）The tie point of the other end.
3. a kind of electric precipitator high frequency electric source according to claim 2, it is characterised in that：The buffer circuit includes,
First buffering capacitance, one end are coupled to the collector of IGBT igbts Q1, and the other end is coupled to IGBT
The emitter of igbt Q3；
Second buffering capacitance, one end are coupled to the collector of IGBT igbts Q2, and the other end is coupled to IGBT
The emitter of igbt Q4.
4. a kind of electric precipitator high frequency electric source according to claim 2, it is characterised in that：The buffer circuit includes series connection
Third buffering capacitance and third buffering diode, series connection the 4th buffering capacitance and the 4th buffering diode, series connection the 5th
Capacitance and the 5th buffering diode, the 6th buffering capacitance and the 6th buffering diode of series connection are buffered,
One end of the third buffering capacitance is coupled to the collector of IGBT igbts Q1, the third buffering two
The cathode of pole pipe is coupled to the emitter of IGBT igbts Q1；
One end of the 4th buffering capacitance is coupled to the emitter of IGBT igbts Q3, the 4th buffering two
The anode of pole pipe is coupled to the collector of IGBT igbts Q3；
One end of the 5th buffering capacitance is coupled to the collector of IGBT igbts Q2, the 5th buffering two
The cathode of pole pipe is coupled to the emitter of IGBT igbts Q2；
One end of the 6th buffering capacitance is coupled to the emitter of IGBT igbts Q4, the 6th buffering two
The anode of pole pipe is coupled to the collector of IGBT igbts Q4.
5. a kind of electric precipitator high frequency electric source according to claim 4, it is characterised in that：The buffer circuit further includes,
First buffer resistance, one end are coupled to the tie point of the third buffering capacitance other end and third buffering diode anode, separately
One end is coupled to the tie point of one end of IGBT igbt Q3 emitters and the 4th buffering capacitance；
Second buffer resistance, one end are coupled to the tie point of the 4th buffering capacitance other end and the 4th buffering diode cathode, separately
One end is coupled to IGBT igbt Q1 collectors and the tie point of one end of third buffering capacitance；
Third buffer resistance, one end are coupled to the tie point of the 5th buffering capacitance other end and the 5th buffering diode anode, separately
One end is coupled to the tie point of one end of IGBT igbt Q4 emitters and the 6th buffering capacitance；
4th buffer resistance, one end are coupled to the tie point of the 6th buffering capacitance other end and the 6th buffering diode cathode, separately
One end is coupled to the tie point of one end of IGBT igbt Q2 collectors and the 5th buffering capacitance.
6. a kind of electric precipitator high frequency electric source according to claim 2, it is characterised in that：The buffer circuit includes series connection
The 7th buffering capacitance and the 5th buffer resistance, series connection the 8th buffering capacitance and the 6th buffer resistance, series connection the 9th buffering
Capacitance and the 7th buffer resistance, the tenth buffering capacitance and the 8th buffer resistance of series connection,
One end of the 7th buffering capacitance is coupled to the collector of IGBT igbts Q1, the 5th buffering electricity
One end of resistance is coupled to the emitter of IGBT igbts Q1；
One end of the 8th buffering capacitance is coupled to the emitter of IGBT igbts Q3, the 6th buffering electricity
One end of resistance is coupled to the collector of IGBT igbts Q3；
One end of the 9th buffering capacitance is coupled to the collector of IGBT igbts Q2, the 7th buffering electricity
One end of resistance is coupled to the emitter of IGBT igbts Q2；
One end of the tenth buffering capacitance is coupled to the emitter of IGBT igbts Q4, the 8th buffering electricity
One end of resistance is coupled to the collector of IGBT igbts Q4.
7. a kind of electric precipitator high frequency electric source according to claim 1, it is characterised in that：The major loop（1）Mainly by
Breaker, contactor, three-phase commutation bridge, filter inductance, filter capacitor are connected in sequence, and electricity is parallel on the contactor
Resistance（R10, R11, R12）.
8. a kind of electric precipitator high frequency electric source according to claim 7, it is characterised in that：It is whole in the contactor and three-phase
Varistor is respectively connected between phase line two-by-two between stream bridge.
9. a kind of electric precipitator high frequency electric source according to claim 1, it is characterised in that：The control loop includes IGBT
Driving plate（4）, sample connection circuit, Digital Signal Processing controller（3）, the IGBT driving board（4）One end and IGBT bridge-types
Inverter（21）It is connected, the other end and Digital Signal Processing controller（3）It is connected, the Digital Signal Processing controller（3）It is logical
Cross IGBT driving board driving IGBT bridge-type inverters（21）.
10. a kind of electric precipitator high frequency electric source according to claim 1, it is characterised in that：The rectification module includes height
The hf rectifier of frequency high voltage silicon rectifier stack composition.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332692A (en) * | 2020-11-23 | 2021-02-05 | 西安热工研究院有限公司 | High-frequency power supply inverter system with buffer circuit for electric precipitation |
| CN113890980A (en) * | 2021-11-02 | 2022-01-04 | 维沃移动通信有限公司 | Camera module and electronic equipment |
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2017
- 2017-09-30 CN CN201721278550.5U patent/CN207573240U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332692A (en) * | 2020-11-23 | 2021-02-05 | 西安热工研究院有限公司 | High-frequency power supply inverter system with buffer circuit for electric precipitation |
| CN113890980A (en) * | 2021-11-02 | 2022-01-04 | 维沃移动通信有限公司 | Camera module and electronic equipment |
| CN113890980B (en) * | 2021-11-02 | 2023-10-24 | 维沃移动通信有限公司 | Camera module and electronic equipment |
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