CN107276425A - A kind of PCU Power Conditioning Unit and its power-supply system - Google Patents
A kind of PCU Power Conditioning Unit and its power-supply system Download PDFInfo
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- CN107276425A CN107276425A CN201710561479.XA CN201710561479A CN107276425A CN 107276425 A CN107276425 A CN 107276425A CN 201710561479 A CN201710561479 A CN 201710561479A CN 107276425 A CN107276425 A CN 107276425A
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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
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Abstract
The invention discloses a kind of PCU Power Conditioning Unit and its power-supply system, including：First signal sampler, ozone concentration signal, generator voltage signal and generator current signal for real-time sampling ozone generator；First controller, is connected with the first signal sampler, poor to calculate concentration error and first phase；Inverter circuit, the LLC booster circuits being sequentially connected with the first controller；First controller is poor according to concentration error and first phase, the first pwm signal is generated, to control inverter circuit output AC voltage；LLC booster circuits produce high-voltage alternating electricity according to alternating voltage resonance so that poor to eliminate concentration error and the first phase coupled to the same same phase of frequency of voltage and current of ozone generator, realize the power adjusting to ozone generator.The PCU Power Conditioning Unit and its power-supply system of the present invention can automatically adjust the power output of ozone generator, it is to avoid off resonance occurs between ozone generator and power-supply system.
Description
Technical field
The present invention relates to power technique fields, more particularly to a kind of PCU Power Conditioning Unit and its power-supply system.
Background technology
The ozone oxidability stronger because possessing and secondary pollution will not be produced, be widely used in sewage disposal, drink
The various fields such as water sterilization, air cleaning, wafer oxidation film preparation and semiconductor cleaning.
As shown in figure 1, existing ozone generating-device mainly has air supply system 200, power-supply system 100, ozone generator
200 and cooling system 400 constitute, wherein, air supply system 200 by air be dried processing after send into ozone generator 200,
Ozone generator 200 synthesizes ozone by discharging tube discharge in the presence of power-supply system 100, and cooling system 400 is then to ozone
Generator 200 is cooled down, it is to avoid the ozone of synthesis is decomposed.Due to the combined coefficient of ozone in ozone building-up process and smelly
The stability of oxygen plant running and power-supply system 100 are closely bound up, therefore power-supply system 100 is the key in ozone building-up process
Part.
At present, the inverter circuit in the power-supply system of ozone generating-device uses phase shift power supply topologies mostly, to move
Exemplified by phase full-bridge circuit, as shown in Fig. 2 it includes 4 switching tubes 101 and 4 diodes 102, wherein, each switching tube 101
Output end it is in parallel with a diode 102, by phase-shift controller 103 control full bridge inverter 4 switching tubes 101 according to
Secondary conducting and disconnection output alternating current, and transformer 104 is connected with the output end of phase whole-bridging circuit, and then realize to ozone
The power supply of generator 200.Because the load capacitive reactance of ozone generator 200 operationally is changed greatly, power-supply system is easily caused
With the off resonance of ozone generator 200 so that there is larger phase difference between the electric current and voltage of ozone generator 200, ozone occurs
Device 200 produces larger power attenuation.
In order to reduce the output loss of ozone generator, the exchange exported in the prior art by constantly regulate power-supply system
Electric frequency, makes the ac frequency of the output of power-supply system and the load performance of ozone generator match.And at present would generally
Manual adjustment knob is set for power conditioning circuitry, staff can just realize the arteries and veins of power-supply system by manual adjustment knob
The manual regulation of frequency and pulse duty factor is rushed, and then adjusts the phase shift of phase-shift circuit, so that the friendship of regulation power supply system output
The electric frequency of stream.But, because staff completes regulation essentially according to the practical experience of oneself, its degree of regulation is low and can not
Adjusted in real time, or it is difficult to ensure that the load performance phase of the ac frequency and ozone generator of power-supply system output
Match somebody with somebody.
The content of the invention
In view of the above-mentioned problems, a kind of PCU Power Conditioning Unit and its power-supply system of the present invention, can automatically adjust ozone hair
The power output of raw device, it is to avoid off resonance occurs between ozone generator and power-supply system so that ozone generator reaches maximum defeated
Go out efficiency, reduce the power attenuation of ozone generator, improve the operational efficiency of PCU Power Conditioning Unit.
In order to solve the above technical problems, a kind of PCU Power Conditioning Unit of the present invention, including：
First signal sampler, for the ozone concentration signal of real-time sampling ozone generator, generator voltage signal and
Generator current signal；
First controller, is connected with first signal sampler, poor to calculate concentration error and first phase；Wherein,
The concentration error is the difference between the ozone concentration signal and default ozone reference concentration, and the first phase difference is
The phase difference of the generator voltage signal and the generator current signal；
Inverter circuit, the LLC booster circuits being sequentially connected with first controller；Wherein, the LLC booster circuits with
The ozone generator coupling；
First controller is poor according to the concentration error and the first phase, generates the first pwm signal so that institute
Inverter circuit is stated according to the first pwm signal output AC voltage, and then adjusts the output to the work(of the LLC booster circuits
Rate；
The LLC booster circuits produce high-voltage alternating electricity according to the alternating voltage resonance so that coupled to the ozone
The voltage and current of generator is poor to eliminate the concentration error and the first phase with the same phase of frequency, realizes to the ozone
The power adjusting of generator.
Compared with prior art, PCU Power Conditioning Unit of the invention gathers ozone generator by the first signal sampler
Ozone concentration signal, generator voltage signal and generator current signal, the ozone collected are calculated by the first controller dense
The concentration error spent between signal and default ozone reference concentration, and generator voltage signal and generator current signal it
Between first phase it is poor, and according to the dutycycle of the first pwm signal of regulation or the pulse in real time of concentration error and first phase error
Frequency so that inverter circuit is according to the first pwm signal output AC voltage.Because inverter circuit is coupled with LLC booster circuits,
LLC booster circuits are coupled with ozone generator, and then the alternating voltage exported by inverter circuit can just adjust LLC boosting electricity
The electric frequency of high-voltage alternating of road output, makes the voltage and the same same phase of frequency of electric current coupled to ozone generator, and then eliminate ozone hair
The concentration error and first phase of raw device are poor, ozone generator is reached maximum output efficiency, it is to avoid power-supply system is sent out with ozone
Off resonance occurs for raw device, reduces the power attenuation of ozone generator, improves the delivery efficiency of power-supply system, extends making for power-supply system
Use the life-span；Further, since the PCU Power Conditioning Unit is believed according to ozone concentration signal, generator current signal and generator voltage
Number, it is automatically generated for eliminating the first pwm signal of concentration error and first phase difference, can not only improves the regulation of power-supply system
Precision, additionally it is possible to liberate manpower, improves the operational efficiency of PCU Power Conditioning Unit, so avoid because manual adjustment brought it is high into
Originally, low reliability and unsafe factor.
As the improvement of such scheme, first controller includes：
Ozone concentration error calculating module, for calculating the ozone concentration signal and the default ozone reference concentration
Between difference；
Reference voltage generation module, for according between the concentration error and generator reference voltage pre-established
Corresponding relation, generates corresponding generator reference voltage；
Reference current generation module, for passing through formula I=Km(V1×V2)/Vrms 2, calculating obtains normalized with reference to electricity
Signal I is flowed, wherein, KmFor normalization factor, V1 is that generator reference voltage, V2 are generator voltage signal, VrmsFor generator
The virtual value of voltage signal；
First phase difference computing module, for calculating between the reference current signal and the generator current signal
Phase difference, obtains the first phase poor；
First pwm signal output module, for exporting first pwm signal according to first phase difference.
As the improvement of such scheme, first controller also includes：
First determination module, for judging whether the concentration error and first phase difference meet preparatory condition, and
And first pwm signal is preserved when meeting the preparatory condition；Wherein described preparatory condition is that the concentration error is located at
Default concentration range and the first phase difference be located at default phase range in；
First regulation starting module, for when the ozone generator starts, first determination module to be preserved
First pwm signal is exported to the inverter circuit.
As the improvement of such scheme, the PCU Power Conditioning Unit also includes：
Active PFC circuit, is connected between rectification circuit and the inverter circuit, for by the electricity after line voltage rectification
Pressure signal is converted to DC voltage；
Filter capacitor, the output end with the active PFC is in parallel, for being filtered place by the DC voltage
Reason.
As the improvement of such scheme, the PCU Power Conditioning Unit, in addition to：
Secondary signal sampler, input voltage signal, input current signal and institute for the active PFC circuit of sampling
State the DC voltage of active PFC circuit conversion；
Second controller, is connected between the secondary signal sampler and the active PFC circuit；
The second controller exports the 2nd PWM letters according to voltage error and second phase difference to the active PFC circuit
Number, and then adjust the power output of the active PFC circuit；Wherein, the voltage error exports DC voltage and pre- to be described
If PFC reference voltages between voltage difference, second phase difference is that the input voltage signal and the input current are believed
Phase difference between number.
As the improvement of such scheme, the second controller includes：
Voltage error computing module, for calculating between the default PFC reference voltages and the input voltage signal
Voltage difference；
Module is normalized, for the voltage error to be normalized, normalized parameter is obtained；
PFC reference current generation modules, for passing through formula IPFC=(C × VPFC)/VPo 2, calculate and obtain normalized PFC
Reference current signal IPFC, wherein, C is normalized parameter, VPFCFor input voltage signal, VPoFor input voltage signal virtual value；
Second phase difference computing module, for calculating between the PFC reference current signals and the input current signal
Phase difference；
Second pwm signal output module, for generating second pwm signal according to second phase difference so that institute
Active PFC circuit is stated according to second pwm signal, it is with frequency to adjust the input voltage signal with the input current signal
Same phase, and then adjust the output to the power of the inverter circuit.
As the improvement of such scheme, the second controller also includes：
Second determination module, for judging whether the voltage error is located in default error range, and described
When voltage error is located in default error range, second pwm signal is preserved；
Second regulation starting module, for when the ozone generator starts, second determination module to be preserved
Second pwm signal is exported to the active PFC circuit.
As the improvement of such scheme, the active PFC power supplys are two-phase active PFC circuit, the active PFC electricity of two-phase
Road includes first switch pipe and second switch pipe；
The secondary signal sampler connects with the source electrode of the first switch pipe and the source electrode of the second switch pipe respectively
Connect, with the switching current for the first switch pipe of sampling and the switching current of the second switch pipe；
The second controller also includes the second pwm signal adjustment module, for adjusting described second according to current error
Pwm signal, to balance the switching current of the first switch pipe and the switching current of the second switch pipe；Wherein, the electricity
Stream error for the first switch pipe switching current and the second switch pipe switching current difference between current.
As the improvement of such scheme, the inverter circuit is full-bridge topology inverter circuit, half-bridge topology inverter circuit, just
Swash topology inverter circuit or flyback topologies inverter circuit.
In order to solve the above technical problems, the present invention also provides a kind of power-supply system, including any of the above-described described power is adjusted
Regulating device.
Brief description of the drawings
Fig. 1 is the structural representation of ozone generating-device in the prior art of the invention.
Fig. 2 is the structural representation of power-supply system in the prior art of the invention.
Fig. 3 is a kind of structural representation of PCU Power Conditioning Unit of the embodiment of the present invention 1.
Fig. 4 is the structural representation of the first controller in the embodiment of the present invention 1.
Fig. 5 is the relation between the delivery efficiency of ozone generator in the embodiment of the present invention and pulse width, pulse frequency
Curve map.
Fig. 6 is a kind of structural representation of PCU Power Conditioning Unit of the embodiment of the present invention 2.
Fig. 7 is the structural representation of second controller in the embodiment of the present invention 2.
Fig. 8 is the structural representation of the first configuration example in the embodiment of the present invention 2.
Fig. 9 is the structural representation of the second configuration example in the embodiment of the present invention 2.
Figure 10 is the structural representation of second controller in the second configuration example in the embodiment of the present invention 2.
Embodiment
Many details are elaborated in the following description to fully understand the present invention.But the present invention can be with
Much it is different from the other modes of this description to implement, those skilled in the art can be in the case of without prejudice to intension of the present invention
Similar popularization is done, therefore the present invention is not limited by following public specific embodiment.
Clear, complete description is carried out to technical scheme with reference to specific embodiments and the drawings.
Embodiment 1
As shown in figure 3, a kind of PCU Power Conditioning Unit of the present invention, including：First signal sampler 1, with ozone generator
200 connections, ozone concentration signal, generator voltage signal and generator electric current for real-time sampling ozone generator 200 are believed
Number；First controller 2, is connected with the first signal sampler 1, poor to calculate concentration error and first phase；Wherein, concentration error
For the difference between ozone concentration signal and default ozone reference concentration, first phase difference is generator voltage signal and generation
The phase difference of device current signal；Inverter circuit 3, is connected with the first controller 2；LLC booster circuits 4, are connected with inverter circuit 3；
First controller 2 is poor according to concentration error and first phase, generates the first pwm signal so that inverter circuit 3 is according to the first PWM
Signal output alternating voltage, to adjust the output to the power of LLC booster circuits 4；LLC booster circuits 4 respectively with inverter circuit 3 and
Ozone generator 200 is coupled；The electric frequency of high-voltage alternating that LLC booster circuits 4 adjust output according to alternating voltage, to eliminate concentration
Error and first phase are poor, and then cause the voltage and the same same phase of frequency of electric current coupled to ozone generator 200, realize and ozone is sent out
The power adjusting of raw device 200.
Compared with prior art, PCU Power Conditioning Unit of the invention passes through the first signal sampler 1 sampling ozone generator
200 ozone concentration signal, generator voltage signal and generator current signal, calculates what is collected by the first controller 2
Concentration error between ozone concentration signal and default ozone reference concentration, and generator voltage signal and generator electric current
First phase between signal is poor, and according to the dutycycle of concentration error and first phase error the first pwm signal of real-time regulation
Or pulse frequency so that inverter circuit 3 is according to the first pwm signal output AC voltage.Because inverter circuit 3 and LLC boost electric
Road 4 is coupled, and LLC booster circuits 4 are coupled with ozone generator 200, and then the alternating voltage exported by inverter circuit 3 just can be with
The electric frequency of high-voltage alternating of the output of LLC booster circuits 4 is adjusted, makes voltage and electric current coupled to ozone generator 200 same with frequency
Concentration error and first phase in phase, and then elimination ozone generator 200 is poor, ozone generator 200 is reached maximum output
Efficiency, it is to avoid with ozone generator 200 off resonance occurs for power-supply system, reduces the power attenuation of ozone generator 200, improves power supply
The delivery efficiency of system, extends the service life of power-supply system；Further, since the PCU Power Conditioning Unit is believed according to ozone concentration
Number, generator current signal and generator voltage signal, be automatically generated for eliminating the first of concentration error and first phase difference
Pwm signal, can not only improve the degree of regulation of power-supply system, additionally it is possible to liberate manpower, improve the operation effect of PCU Power Conditioning Unit
Rate, and then avoid because of high cost, low reliability and the unsafe factor that manual adjustment is brought.
Wherein, as shown in figure 4, the first controller 2 includes：Ozone concentration error calculating module 21, it is dense for calculating ozone
The difference spent between signal and default ozone reference concentration；Reference voltage generation module 22, for dense according to what is pre-established
The corresponding relation spent between error and generator reference voltage, generates corresponding generator reference voltage；Reference current generates mould
Block 23, for passing through formula I=Km(V1×V2)/Vrms 2, calculate and obtain normalized reference current signal I, wherein, KmTo return
One changes the factor, and V1 is that generator reference voltage, V2 are generator voltage signal, VrmsFor the virtual value of generator voltage signal；The
One phase difference calculating module 24, for calculating the phase difference between reference current signal and generator current signal, and then is obtained
First phase is poor；First pwm signal output module 25, for according to first phase difference adjust the first pwm signal dutycycle or
Pulse frequency is simultaneously exported so that inverter circuit 3 adjusts alternating current voltage frequency according to the first pwm signal.
Specifically, when first phase difference is less than 0, i.e., the voltage delay of ozone generator 200 is in ozone generator 200
Electric current, then the first pwm signal of the first pwm signal output module 25 output gradually increased dutycycle at predetermined intervals
Or pulse frequency is gradually reduced at predetermined intervals, until first phase difference is 0；It is smelly when first phase difference is more than 0
The voltage of Oxygen Generator 200 is ahead of the electric current of ozone generator 200, then the first of the first pwm signal output module 25 output
Pwm signal is gradually reduced dutycycle or gradually increases pulse frequency at predetermined intervals at predetermined intervals, directly
It is 0 to first phase difference.Due to being preset with corresponding relation, therefore first between ozone concentration error and generator reference voltage
Pwm signal output module 25 can eliminate the ozone concentration error and the of ozone generator 200 automatically by adjusting the first pwm signal
One phase difference, reduces the power attenuation of ozone generator 200.
Further, in order to improve the regulation efficiency of PCU Power Conditioning Unit, as shown in Figure 3 and Figure 4, first controller 2
Also include：First determination module 26, for judging whether concentration error and first phase difference meet preparatory condition, and is meeting
Corresponding first pwm signal is preserved during preparatory condition；Wherein preparatory condition is that concentration error is located at default concentration range and the
One phase difference is located in default phase range；First regulation starting module 27, for when ozone generator 200 starts, inciting somebody to action
The first pwm signal that first determination module 26 is preserved is exported to inverter circuit 3, and then can keep ozone generator 200 in startup
When just can reach maximum output efficiency, lift life-span and the operational efficiency of ozone generator 200.
In specific implementation process, as shown in Figure 3 and Figure 5, when the dutycycle of the first pwm signal is fixed, the first PWM letters
The modulating frequency for the first pwm signal that number output module 25 is exported constantly increases so that concentration error and first phase difference first subtract
It is small to increase again, and then cause the delivery efficiency of ozone generator 200 first increases to reduce again, it thus can obtain ozone generator 200
Maximum output efficiency.
Embodiment 2
As shown in Figure 6 and Figure 7, another PCU Power Conditioning Unit of the invention, except including whole parts in embodiment 1
Outside, in addition to：Active PFC circuit 5, is connected between rectification circuit 12 and inverter circuit 3, for the electricity for exporting power network 8
Voltage signal after the electric rectification of pressuring meridian rectification circuit 12 of net is converted to DC voltage；Filter capacitor 6, with active PFC circuit 5 simultaneously
Connection, for being filtered processing to the voltage after being changed through active PFC circuit 5.
It is preferred that the PCU Power Conditioning Unit also includes：Secondary signal sampler 7, for the defeated of active PFC circuit 5 of sampling
Enter the DC voltage after voltage signal, input current signal and active PFC circuit 5 are changed；Secondary signal sampler 7 and active
Pfc circuit 5 is connected with second controller 8 respectively so that second controller 8 is according to voltage error and second phase difference generation second
Pwm signal, it is poor to eliminate the second phase between the input voltage signal of active PFC circuit 5 and input current signal, reduce active
The power attenuation of pfc circuit 5, and then improve the power factor of power-supply system；Simultaneously as second controller 8 can pass through second
Signal sampler 7 obtains the input voltage signal and input current signal of active PFC circuit 5, can according to the electric power thus supplied of power network 8
The power output of regulation active PFC circuit 5, and then the power efficiency of power-supply system can be improved in real time, it is to avoid load pollution power network；
Wherein, voltage error is the voltage difference between output DC voltage and default PFC reference voltages, and second phase difference is input electricity
Press the phase difference between signal and input current signal.
Wherein, as shown in fig. 7, the second controller 8 also includes：Voltage error computing module 81, it is default for calculating
Voltage difference between PFC reference voltages and PFC DC voltages；Module 82 is normalized, for voltage error to be normalized into place
Reason, obtains normalized parameter；PFC reference currents generation module 83, for passing through formula IPFC=(C × VPFC)/VPo 2, calculate
To normalized PFC reference current signals IPFC, wherein, C is normalized parameter, VPFCFor input voltage signal, VPoFor input electricity
Press the virtual value of signal；Second phase difference computing module 84, for calculating between PFC reference current signals and input current signal
Phase difference；Second pwm signal output module 85, for according to second phase difference the second pwm signal of generation so that active PFC
Circuit 5 is with same phase, and then adjust the output to frequently with input current signal according to the second pwm signal, regulation input voltage signal
The power of inverter circuit 3.
Specifically, when second phase error is less than 0, i.e. the input voltage of active PFC circuit 5 lags behind input current,
Then the second pwm signal output module 85 generation the second pwm signal at predetermined intervals gradually increase dutycycle or with
Default time interval is gradually reduced pulse frequency, until second phase error is 0；It is active when second phase error is more than 0
The input voltage of pfc circuit 5 is ahead of input current, then the second pwm signal of the second pwm signal output module 85 generation is with pre-
If time interval be gradually reduced dutycycle or gradually increase pulse frequency at predetermined intervals, until second phase miss
Difference is 0.
Further, in order to increase the regulation efficiency of PCU Power Conditioning Unit, the second controller 8 also includes：Second judges
Module 86, for judging whether voltage error is located in default error range, and it is default judging that voltage error is located at
When in error range, corresponding second pwm signal is preserved；Second regulation starting module 87, for starting in ozone generator 200
When, the second pwm signal that the second determination module 86 is preserved is exported to active PFC circuit 5.
In the above-described embodiments, active PFC circuit 5 is that single-phase active pfc circuit, two-phase active PFC circuit or multiphase have
Source pfc circuit.
Further, inverter circuit 3 is full-bridge topology inverter circuit, half-bridge topology inverter circuit, forward topology inversion electricity
Road or flyback topologies inverter circuit.
It is preferred that being in series with overvoltage crowbar, anti-surge circuit or overcurrent protection electricity between power network and rectification circuit
Road, prevents power network abnormal electrical power supply, to protect the active PFC circuit 5 of rear class.Wherein, current foldback circuit is by relay and fusing
Device is composed in parallel；Surging prevention resistance is in parallel by relay and negative tempperature coefficient thermistor；Overvoltage crowbar is by relay
Device is composed in parallel with piezo-resistance.
It is preferred that as shown in fig. 6, being connected between the first signal sampler 1 and the first controller 2 for shaping filter
The first plastic filter circuit 9；For shaping filter is connected between secondary signal sampler 7 and second controller 8
Two plastic filter circuits 10, to reduce sampling interference.
Further, the first signal sampler 1 includes the voltage transformer or partial pressure for sample generator voltage signal
Sampling resistor, current transformer or sampling resistor for sample generator current signal；Secondary signal sampler 7 includes being used for
The voltage transformer or partial pressure sampling resistor of sampled input voltage signal, for input current signal of sampling current transformer or
Sampling resistor.
Embodiment 3
As shown in figure 8, being the first exemplary construction schematic diagram of PCU Power Conditioning Unit in embodiment 2.
Inverter circuit 3 is configured to full bridge inverter, and the full bridge inverter includes first switch pipe 31, second switch pipe
32nd, the 3rd switching tube 33 and the 4th switching tube 34；Wherein, the of the first output end of first switch pipe 31 and the 3rd switching tube 33
One output end is connected with one end of filter capacitor 6, the second output end of second switch pipe 32 and the second of the 4th switching tube 34 defeated
Go out end to be connected with the other end of filter capacitor 6；Second output end of first switch pipe 31 and the first output of second switch pipe 32
End connection, and the second efferent duct of first switch and the tie point of the first output end of second switch pipe 32 and LLC series resonances
The input connection of circuit 41；Second output end of the 3rd switching tube 33 and the first output end connection of the 4th switching tube 34,
And the 3rd switching tube 33 the second output end and the 4th switching tube 34 the first output end tie point and LLC series resonant circuits
41 another input connection；First switch pipe 31, second switch pipe 32, the input of the 3rd switching tube 33 and the 4th switching tube 34
End is connected with the first controller 2 so that the switching tube 34 of first switch pipe 31 and the 4th is simultaneously turned on or cut according to the first pwm signal
Only, and the switching tube 33 of second switch pipe 32 and the 3rd is also resulted in or ended according to the first pwm signal, and then the full-bridge is promoted
The stable alternating voltage of the output of inverter circuit 3, improves the electromagnetic interference problem of PCU Power Conditioning Unit, moreover it is possible to improve full-bridge inverting electricity
The topological efficiency on road 3.Due to the first pwm signal according to the ozone concentration signal of ozone generator 200, generator voltage signal,
Generator current signal and the generation of default ozone reference concentration, therefore full-bridge inverting electricity can adjust by the first pwm signal
The frequency of 3 output AC voltages in road, so as to adjust the resonant frequency of LLC series resonant circuits 41 so that boosted by high frequency
Device 42 reduces the power attenuation of ozone generator 200, improved coupled to the same same phase of frequency of voltage and current of ozone generator 200
The delivery efficiency of ozone generator 200, realizes that power-supply system and the load characteristic of ozone generator 200 are matched.
It is to be appreciated that above-mentioned inverter circuit 3 is only described in detail by taking full bridge inverter as an example, inverter circuit 3
Half-bridge topology inverter circuit, forward topology inverter circuit or flyback topologies inverter circuit are can also be, is not repeated one by one herein.
Active PFC circuit 5 is configured to single-phase active pfc circuit, and the single-phase active pfc circuit includes the first inductance 51, the
One switching tube 52 and the first commutation diode 53；Wherein, first switch pipe 52 can be MOSFET, BJT, IGBT or other types
Switching device, below by first switch pipe 52 be MOSFET exemplified by illustrate.
One end of first inductance 51 and the output end of overvoltage crowbar are connected, and the other end of the first inductance 51 is opened with first
Close the drain electrode of pipe 52 and the positive pole of the first commutation diode 53 is connected respectively；The source electrode of first switch pipe 52 and the pole of the first rectification two
The negative pole of pipe 53 is connected respectively with the two ends of filter capacitor 6；The grid of first switch pipe 52 is connected with second controller 8 so that
First switch pipe 52 adjusts the input voltage of the single-phase active pfc circuit and defeated according to the second pwm signal on or off
It is that, with the same phase of frequency, can improve the delivery efficiency of power-supply system to enter electric current, it is to avoid pollution power network；Simultaneously as the active PFC circuit
5 realize ZVT using second controller 8, moreover it is possible to greatly reduce switching loss.
In the present embodiment, LLC booster circuits 4 include LLC series resonant circuits 41 and high frequency booster 42；Wherein, LLC
Series resonant circuit 41 includes the first resonant inductance 411, is sequentially connected in series the resonant capacitance 412 coupled with the first resonant inductance 411
With the second resonant inductance 413；The input of transformer 4 is in parallel with the second resonant inductance 413.
Embodiment 4
As shown in figure 9, being the second exemplary construction schematic diagram of PCU Power Conditioning Unit in embodiment 2.
Inverter circuit is identical with the inverter circuit in embodiment 3, is again arranged as full bridge inverter.Difference exists
In it is two-phase active PFC circuit that active PFC circuit 5 is configured in the embodiment.The two-phase active PFC circuit includes the first inductance
511st, the second inductance 521, first switch pipe 512, second switch pipe 522, the first commutation diode 513 and the second commutation diode
523；Wherein, first switch pipe 512 and second switch 522 can be MOSFET, BJT, IGBT or other kinds of switching device,
It is described in detail below so that first switch pipe 512 and second switch 522 are MOSFET as an example.
The series arm of first inductance 511 and the first commutation diode 513 be connected to the output end of surge protection circuit with
Between the positive ends of filter capacitor 6, the series arm of the second inductance 521 and the second commutation diode 523 and the first inductance 511
Series arm with the first commutation diode 513 is in parallel；First inductance 511 and the tie point of the first commutation diode 513 and
The drain electrode connection of one switching tube 512, the source electrode of first switch pipe 512 is connected with the negative polarity end of filter capacitor 6；Second inductance
521 are connected with the tie point of the second commutation diode 523 with the drain electrode of second switch pipe 522, the source electrode of second switch pipe 522 with
The negative polarity end connection of filter capacitor 6；The grid of first switch pipe 512 and second switch pipe 522 is connected with second controller 8,
So that first switch pipe 512 and second switch pipe 522 can carry out alternation according to the pwm signal of two-way second, the two-phase is adjusted
The input voltage and input current of active PFC circuit 5 are that, with the same phase of frequency, can improve the delivery efficiency of power-supply system, it is to avoid pollution
Power network, simultaneously as first switch pipe 512 and the alternation of second switch pipe 522, moreover it is possible to further reduce first switch pipe
512 and the energy consumption of second switch pipe 522 so that the PCU Power Conditioning Unit is applied to high-power ozone generator.
In this embodiment, as shown in Figure 9 and Figure 10, the secondary signal sampler 7 of PCU Power Conditioning Unit, is additionally operable to sampling
The switching current of first switch pipe 512 and the switching current of second switch pipe 522.For example, secondary signal sampler 7 also includes electricity
Current transformer or sampling resistor, are illustrated so that secondary signal sampler 7 includes current transformer as an example below.
First current transformer is connected between the source electrode of first switch pipe 512 and the negative polarity end of filter capacitor 7, to adopt
The switching current of sample first switch pipe 512；Second current transformer is connected to the source electrode and filter capacitor 7 of second switch pipe 522
Negative polarity end between, with the switching current for second switch pipe 522 of sampling；Controller also includes the second pwm signal adjustment module
106, for calculating the current error between the switching current of first switch pipe 512 and the switching current of second switch pipe 522, and
The dutycycle or pulse width of any pwm signal of road second are adjusted according to the current error, the 2nd PWM after adjusting all the way is exported
Signal, the second pwm signal and the second pwm signal after the regulation can eliminate current error so that first switch pipe 512 and second
The current balance type of switching tube 522, prevents any one in first switch pipe 512 and second switch pipe 522 because electric current is excessive and loses
Weighing apparatus.
In the present embodiment, LLC booster circuits 4 include LLC antiresonant circuits 43 and high frequency booster 44；Wherein, LLC
Resonant capacitance 432 and resonance electricity that antiresonant circuit 43 includes the first resonant inductance 431, connected with the first resonant inductance 431
Hold 432 second resonant inductances 433 in parallel；The input side of high frequency booster 44 is in parallel with the second resonant inductance 433.
It is to be appreciated that in embodiment 3 and embodiment 4 respectively using single-phase active pfc circuit, two-phase active PFC circuit as
Example is illustrated to active PFC circuit 5, and active PFC circuit 5 of the invention can also be multiphase active PFC circuit, due to many
The implementation of phase active PFC circuit is similar to two-phase active PFC circuit, does not repeat one by one herein.
The present invention also provides a kind of power-supply system, including any of the above-described kind of PCU Power Conditioning Unit.
The present invention also provides a kind of ozone generating-device, including above-mentioned power-supply system.
The above described is only a preferred embodiment of the present invention, any formal limitation not is done to the present invention, therefore
All contents without departing from technical solution of the present invention, the technical spirit according to the present invention any is simply repaiied to made for any of the above embodiments
Change, equivalent variations and modification, in the range of still falling within technical solution of the present invention.
Claims (10)
1. a kind of PCU Power Conditioning Unit, it is characterised in that including：
First signal sampler, ozone concentration signal, generator voltage signal and generation for real-time sampling ozone generator
Device current signal；
First controller, is connected with first signal sampler, poor to calculate concentration error and first phase；Wherein, it is described
Concentration error is the difference between the ozone concentration signal and default ozone reference concentration, and the first phase difference is described
The phase difference of generator voltage signal and the generator current signal；
Inverter circuit, the LLC booster circuits being sequentially connected with first controller；Wherein, the LLC booster circuits with it is described
Ozone generator is coupled；
First controller is poor according to the concentration error and the first phase, generates the first pwm signal so that described inverse
Become circuit according to the first pwm signal output AC voltage, and then adjust the output to the power of the LLC booster circuits；
The LLC booster circuits produce high-voltage alternating electricity according to the alternating voltage resonance so that occur coupled to the ozone
The voltage and current of device is poor to eliminate the concentration error and the first phase with the same phase of frequency, realizes and the ozone occurs
The power adjusting of device.
2. PCU Power Conditioning Unit as claimed in claim 1, it is characterised in that first controller includes：
Ozone concentration error calculating module, for calculating between the ozone concentration signal and the default ozone reference concentration
Difference；
Reference voltage generation module, for according to corresponding between the concentration error and generator reference voltage pre-established
Relation, generates corresponding generator reference voltage；
Reference current generation module, for passing through formula I=Km(V1×V2)/Vrms 2, calculate and obtain normalized reference current letter
Number I, wherein, KmFor normalization factor, V1 is that generator reference voltage, V2 are generator voltage signal, VrmsFor generator voltage
The virtual value of signal；
First phase difference computing module, for calculating the phase between the reference current signal and the generator current signal
Difference, obtains the first phase poor；
First pwm signal output module, for exporting first pwm signal according to first phase difference.
3. PCU Power Conditioning Unit as claimed in claim 2, it is characterised in that first controller also includes：
First determination module, for judging whether the concentration error and first phase difference meet preparatory condition, and
Corresponding first pwm signal is preserved when meeting the preparatory condition；Wherein described preparatory condition is that the concentration error is located in advance
If concentration range and the first phase difference be located at default phase range in；
First regulation starting module, for when the ozone generator starts, by the first of first determination module preservation
Pwm signal is exported to the inverter circuit.
4. PCU Power Conditioning Unit as claimed in claim 1, it is characterised in that also include：
Active PFC circuit, is connected between rectification circuit and the inverter circuit, for the voltage after line voltage rectification to be believed
Number be converted to DC voltage；
Filter capacitor, the output end with the active PFC is in parallel, for being filtered processing by the DC voltage.
5. PCU Power Conditioning Unit as claimed in claim 4, it is characterised in that also include：
Secondary signal sampler, for the input voltage signal for the active PFC circuit of sampling, input current signal and described has
The DC voltage of source pfc circuit conversion；
Second controller, is connected between the secondary signal sampler and the active PFC circuit；
The second controller exports the second pwm signal according to voltage error and second phase difference to the active PFC circuit, enters
And adjust the power output of the active PFC circuit；Wherein, the voltage error exports DC voltage and default to be described
Voltage difference between PFC reference voltages, second phase difference for the input voltage signal and the input current signal it
Between phase difference.
6. PCU Power Conditioning Unit as claimed in claim 5, it is characterised in that the second controller includes：
Voltage error computing module, for calculating the electricity between the default PFC reference voltages and the input voltage signal
Pressure difference；
Module is normalized, for the voltage error to be normalized, normalized parameter is obtained；
PFC reference current generation modules, for passing through formula IPFC=(C × VPFC)/VPo 2, calculate and obtain normalized PFC references
Current signal IPFC, wherein, C is normalized parameter, VPFCFor input voltage signal, VPoFor the virtual value of input voltage signal；
Second phase difference computing module, for calculating the phase between the PFC reference current signals and the input current signal
Potential difference；
Second pwm signal output module, for generating second pwm signal according to second phase difference so that described to have
Source pfc circuit is according to second pwm signal, and it is same with frequency to adjust the input voltage signal with the input current signal
Phase, and then adjust the output to the power of the inverter circuit.
7. PCU Power Conditioning Unit as claimed in claim 6, it is characterised in that the second controller also includes：
Second determination module, for judging whether the voltage error is located in default error range, and in the voltage
When error is located in default error range, corresponding second pwm signal is preserved；
Second regulation starting module, for when the ozone generator starts, by the second of second determination module preservation
Pwm signal is exported to the active PFC circuit.
8. PCU Power Conditioning Unit as claimed in claim 6, it is characterised in that the active PFC power supplys are the active PFC electricity of two-phase
Road, the two-phase active PFC circuit includes first switch pipe and second switch pipe；
The secondary signal sampler is connected with the source electrode of the first switch pipe and the source electrode of the second switch pipe respectively, with
Sample the switching current of the first switch pipe and the switching current of the second switch pipe；
The second controller also includes the second pwm signal adjustment module, believes for adjusting the 2nd PWM according to current error
Number, to balance the switching current of the first switch pipe and the switching current of the second switch pipe；Wherein, the current error
The difference between current of the switching current of switching current and the second switch pipe for the first switch pipe.
9. PCU Power Conditioning Unit as claimed in claim 1, it is characterised in that the inverter circuit is full-bridge topology inversion electricity
Road, half-bridge topology inverter circuit, forward topology inverter circuit or flyback topologies inverter circuit.
10. a kind of power-supply system, it is characterised in that including PCU Power Conditioning Unit such as according to any one of claims 1 to 9.
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| CN107276425B (en) | 2019-03-19 |
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