CN206894273U - A kind of piecewise linearity capacitor constant-current charging power - Google Patents
A kind of piecewise linearity capacitor constant-current charging power Download PDFInfo
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- CN206894273U CN206894273U CN201720475427.6U CN201720475427U CN206894273U CN 206894273 U CN206894273 U CN 206894273U CN 201720475427 U CN201720475427 U CN 201720475427U CN 206894273 U CN206894273 U CN 206894273U
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Abstract
The utility model discloses a kind of piecewise linearity capacitor constant-current charging power, including primary side full-bridge series resonance module, secondary rectification module, measurement sampling module, double-closed-loop control module, controller and drive module；The measurement sampling module is made up of the Hall current ring for sample rate current and the first voltage grading resistor R1 for sampled voltage, the second voltage grading resistor R2；The double-closed-loop control module uses voltage and current Dual-loop feedback control mode；The controller connection double-closed-loop control module and drive module, for power source charges to be divided into quick charge region and soft charge region, the controlling dead error time produces drive signal and start charging shutdown stops filling operation；The drive module connection controller and primary side full-bridge series resonance module.The utility model can realize piecewise linearity constant-current charge, can effectively prevent charging overvoltage, power supply is improved the precision of charging under conditions of charge rate is not lost, and meet the different requirements of those skilled in the art.
Description
Technical field
The utility model belongs to high-voltage capacitor charging technical field, specially a kind of piecewise linearity capacitor constant-current charge electricity
Source.
Background technology
Traditional energy system is typically using capacitor as core energy storage device, therefore the research tool to capacitor charging power supply
There is important value and significance.
At present, series resonance capacitor charge power supply, abbreviation series resonance CCPS, because it has anti-loading short-circuit capacity
By force, the advantages of constant output current, it is widely used in high-voltage capacitor charging field.In high repetition frequency charging field
Close, usually using resonant operational mode is owed, the series resonance CCPS worked under deficient resonance manner has easy series resonance CCPS
In realizing the characteristics of zero current turning-on turns off, mean charging current is constant, switching loss and electromagnetic interference can be effectively reduced,
Especially suitable for high repetition frequency charging occasion.But this power supply is directly charged by the way of open loop mostly, charging current
Speed can not be controlled.Especially, in large current charge, because charge rate is especially fast, charging voltage mistake can be caused
Punching, cause being reduced up to value precision for energy resource system, or even damage energy resource system.
Utility model content
The utility model is not high and overcharge in order to solve the problems, such as existing capacitor charging power supply precision in quick charge,
A kind of piecewise linearity capacitor constant-current charging power is provided.
Technical scheme is as follows：
A kind of piecewise linearity capacitor constant-current charging power, including primary side full-bridge series resonance module, secondary rectification module,
Measure sampling module, double-closed-loop control module, controller and drive module；The primary side full-bridge series resonance module is by the first work(
Rate switching tube S1, the second power switch tube S 2, the 3rd power switch tube S 3, the 4th power switch tube S 4, resonant inductance Lr, resonance
Electric capacity CrComposition；The secondary rectification module is by the first commutation diode D1, the second commutation diode D2, the 3rd commutation diode
D3, the 4th commutation diode D4, energy-storage capacitor CqComposition；The measurement sampling module is by the Hall current for sample rate current
Ring Rwsi and the first voltage grading resistor R1, the second voltage grading resistor R2 composition for sampled voltage, Hall current ring are connected on
In the resonance circuit of primary side full-bridge series resonance module；It is in parallel after first voltage grading resistor R1, the second voltage grading resistor R2 series connection
In the energy-storage capacitor C of secondary rectification moduleqBoth ends；The double-closed-loop control module connection measurement sampling module and controller,
Using voltage and current Dual-loop feedback control mode, for will measure the sample rate current of sampling module collection, sampled voltage is sent into control
Device processed；The controller connection double-closed-loop control module and drive module, for power source charges to be divided into quick charge region
With soft charge region, the controlling dead error time produces drive signal and start charging shutdown stops filling operation；The drive module connection
Controller and primary side full-bridge series resonance module, for amplifying drive signal caused by controller and being sent to primary side full-bridge string
Join resonance modules.
The double-closed-loop control module also includes being used to produce the voltage comparator up to value signal, voltage comparator output end
It is connected with controller, input is connected to the centre of the first divider resistance R1 and the second divider resistance R2 series connection, voltage comparator
Input be also associated with power source charges reference voltage Uref。
The controller is additionally operable to soft charge region division being more than 1 into n sections, n.
A kind of piecewise linearity capacitor constant-current charging circuit, including by 4 1~S4 of power switch tube S and 4 diode D5
The full bridge inverter of~D8 compositions, LC resonance circuits, transformer T, the full-bridge rectification electricity being made up of 4 diode D1~D4
Road, energy-storage capacitor Cq, by Hall current ring Rwsi, the first voltage grading resistor R1, the second voltage grading resistor R2 and voltage ratio compared with
The feedback circuit of device composition and the control circuit that is made up of controller and driver, DC power anode connect full bridge inverter the
One power switch tube S 1, the second power switch tube S 2 drain, and DC power cathode connects the power switch pipe of full bridge inverter the 3rd
S3, the 4th power switch tube S 4 source electrode；The source electrode of first power switch tube S 1 connects the drain electrode of the 3rd power switch tube S 3, second
The source electrode of power switch tube S 2 connects the drain electrode of the 4th power switch tube S 4；First to fourth diode D5~D8 difference inverse parallels exist
In first to fourth 1~S4 of power switch tube S drain electrode and source electrode；The source electrode of first power switch tube S 1 is sequentially connected resonance electricity
Feel Lr, transformer T primary coils, resonant capacitance CrThe source electrode of the second power switch tube S 2 is connected to afterwards；Hall in feedback circuit
Electric current loop Rwsi is connected in a resonant circuit, and Hall current ring Rwsi output end is connected in the controller of control circuit；Become
Depressor T secondary meets the ac input end of full bridge rectifier, the direct current output termination energy-storage capacitor C of full bridge rectifierq
Both ends, feedback circuit the first voltage grading resistor R1, the second voltage grading resistor R2 series connection after be connected in parallel on energy-storage capacitor Cq's
Both ends；The input that wiring is connected to voltage comparator is drawn between first voltage grading resistor R1, the second voltage grading resistor R2
End, another input termination power source charges reference voltage U of voltage comparatorref, the output end Access Control electricity of voltage comparator
In the controller on road, the controller connection driver of control circuit exports four tunnel control circuits using bus and is respectively connecting to first
To the 4th 1~S4 of power switch tube S grid.
First to fourth 1~S4 of power switch tube S in the full bridge inverter is N-channel enhancement mode FET.
The driving chip model IR2112 of driver in the control circuit.
Compared with conventional art, the utility model uses the technical scheme of voltage and current double closed-loop feedback, can be to charging
Speed carries out Discrete control and realizes piecewise linearity constant-current charge, can effectively prevent charging overvoltage, while power supply is not being lost
The precision of charging is improved under conditions of charge rate, meets the different requirements of those skilled in the art.
Brief description of the drawings
Fig. 1 is a kind of structural representation of piecewise linearity capacitor constant-current charging power.
Fig. 2 is the control flow chart of one embodiment of the utility model.
Fig. 3 is one embodiment of the utility model and conventional power source charging effect comparison diagram.
In figure, T：Step-up transformer；S1~S4：First to fourth power switch pipe；D5~D8：First to fourth 2 poles
Pipe；Lr：Resonant inductance；Cr：Resonant capacitance；D1~D4：First to fourth commutation diode；Cq：Energy-storage capacitor；R1, R2：The
One, the second voltage grading resistor；Uq：Sampled voltage；ir：Sample rate current；Rwsi：Hall current ring；DZXH：Up to value signal；Uref：Electricity
Source charge reference voltage；Controller：Controller；Driver：Drive module.
In Fig. 3, A：Conventional power source charging technique charging curve；B：The utility model one embodiment charging curve；Q_C：
Quick charge region；S_C1：Soft charge region 1；S_C2：Soft charge region 2；S_C3：Soft charge region 3.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, in conjunction with drawings and Examples,
The utility model is further elaborated.Obviously, described embodiment is only that the utility model part is implemented
Example, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making wound
The every other embodiment obtained under the premise of the property made work, belong to the scope of the utility model protection.
As shown in figure 1, a kind of piecewise linearity capacitor constant-current charging power, including primary side full-bridge series resonance module, pair
Side rectification module, measurement sampling module, double-closed-loop control module, controller and drive module；The primary side full-bridge series resonance
Module is by the first power switch tube S 1, the second power switch tube S 2, the 3rd power switch tube S 3, the 4th power switch tube S 4, humorous
Shake inductance Lr, resonant capacitance CrComposition；The secondary rectification module is by the first commutation diode D1, the second commutation diode D2,
Three commutation diode D3, the 4th commutation diode D4, energy-storage capacitor CqComposition；The measurement sampling module is by for sampling electricity
The Hall current ring Rwsi of stream and the first voltage grading resistor R1, the second voltage grading resistor R2 composition for sampled voltage, Hall
Electric current loop is connected in the resonance circuit of primary side full-bridge series resonance module；First voltage grading resistor R1, the second voltage grading resistor
The energy-storage capacitor C of secondary rectification module is parallel to after R2 series connectionqBoth ends；The double-closed-loop control module connection measurement sampling mould
Block and controller, using voltage and current Dual-loop feedback control mode, for sample rate current, the sampling of sampling module collection will to be measured
Voltage is sent into controller；The controller connection double-closed-loop control module and drive module, for power source charges to be divided into soon
Fast charged area and soft charge region, the controlling dead error time produces drive signal and start charging shutdown stops filling operation；The drive
Dynamic model block connects controller and primary side full-bridge series resonance module, for amplifying and being sent to drive signal caused by controller
Primary side full-bridge series resonance module.
The double-closed-loop control module also includes being used to produce the voltage comparator up to value signal, voltage comparator output end
It is connected with controller, input is connected to the centre of the first divider resistance R1 and the second divider resistance R2 series connection, voltage comparator
Input be also associated with power source charges reference voltage Uref。
Sampling module is measured using the first voltage grading resistor R1, the second voltage grading resistor R2 collection sampled voltage Uq, utilize
Hall current ring collection sample rate current ir, double-closed-loop control module is on the one hand by sampled voltage Uq, sample rate current irIt is transmitted directly to
Controller, controller set power source charges reference voltage Uref, initial charge current Iavg, divide quick charge region and soft charge
The spacing voltage U in region in regions1, controller is according to sampled voltage UqWith the spacing voltage U in soft charge regions1Comparative result sentence
Region belonging to disconnected power source charges, and then gradually change dead time and reduce charging current, the change of dead time is controller
According to initial charge current IavgWith sample rate current irBetween error signal carry out PI control realize, pass through send driving letter
The work of primary side full-bridge series resonance module is driven number after drive module is amplified, changes charging current so that charging voltage is stable
Reach power source charges reference voltage level, realize the function of piecewise linearity constant-current charge；On the other hand will be adopted by voltage comparator
Sample voltage UqWith power source charges reference voltage UrefIt is compared, as sampled voltage UqMore than power source charges reference voltage UrefWhen produce
Raw to reach value signal DZXH input controllers, controller, which receives, to carry out shutdown up to value signal DZXH and stops filling operation.
Initial stage, sampled voltage U was set in power source chargesq=[0, Us1] it is quick charge region, wherein, Us1=k*Uref；K is
Fast charge coefficient 0<k<1, UrefFor power source charges reference voltage, smaller dead time is set, using large current charge.When sampling electricity
Press Uq>Us1When, power source charges enter soft charge region, and controller is spacing into n sections, each section of region of setting soft charge region division
Magnitude of voltage is Us1, Us2…Usn, controller is gradually reduced the charging current in every section of region by increasing dead time, gradual to drop
Low charge rate, charging voltage is set smoothly to reach power source charges reference voltage level, so as to change the size of charging current with this
Reach the purpose for changing charge rate.Specific dead time is by those skilled in the art according to actual determination.Initial charge current
IavgSize and dead time tdRelation such as formula (1) shown in.
In formula, Cr、Lr、UiRespectively resonant capacitance, resonant inductance, input voltage.
Hall current ring sampling charging current ir, by initial charge current IavgWith sample rate current irIt can obtain error signal such as
Shown in formula (2).
E (t)=Iavg-ir (2)
Dead time is adjusted to realize the function of linear constant current charging by the PI controls shown in formula (3).
In formula, KpFor proportionality coefficient, TIFor integral coefficient.
Controller is according to as the dead time t shown in formula (3)dWith as the ON time t shown in formula (4)rFor series resonance electricity
Road produces required drive signal, shown in time such as formula (5), so as to realize that piecewise linearity charges.
TD=td+tr (5)
Specific embodiment is as follows：As shown in Figure 1 and Figure 2, a kind of piecewise linearity capacitor constant-current charging power of the present embodiment is adopted
With a kind of piecewise linearity capacitor constant-current charging circuit.Set dc source Ui=320V, first to fourth power switch pipe
S1~S4 type selectings are N-channel enhancement mode FET, and transformer T no-load voltage ratios are 40, resonant inductance LrValue be 40uH, resonant capacitance
CrValue for 0.1uF form series resonant tank, D1~D4 composition full bridge rectifier, D5~D8 is first to fourth 2 poles
Pipe, CqFor energy-storage capacitor, the model IR2112 of driver driving chip.
First, initialization operation is carried out to controller, power source charges reference voltage U is setrefWith initial charge current Iavg,
Charged area is divided.Power source charges reference voltage U is setref=9kV, Iavg=15A, fast charge coefficient k=0.67, then
The spacing voltage U in soft charge regions1=6kV, Uq=[0,6kV] is quick charge region, and charging current is protected always in the region
Hold maximum.As sampled voltage UqVoltage U spacing more than soft charge regions1When power supply enter soft charge region, by soft charge area
Domain is divided into 3 sections：It is soft to fill 1：Us1<Uq<Us2, it is soft to fill 2：Us2<Uq<Us3, it is soft to fill 3：Us3<Uq<Uref, the spacing voltage in 3 regions
Value is respectively Us1=6kV, Us2=7kV, Us3=8kV.
Then, start shooting sampled voltage UqWith the power source charges reference voltage U of settingref, 3 spacing electricity in soft charge region
Pressure value Us1, Us2, Us3Make comparisons respectively, judge that power supply is in which of charged area, in quick charge region, controller in stage
Choose smaller dead time td=3us, charging current is set to keep higher value, quick charge, when can obtain resonance according to above-mentioned formula
Between tr=25us, driving time TD=28us.When entering soft charge region, controller judges which rank into soft charge region
Section, the dead time in every section of region is controlled gradually to increase, charging current is gradually reduced, and is gradually reduced the speed of charging, is made to fill
Piezoelectric voltage smoothly reaches power source charges reference voltage level, so as to improve the precision of charging.When power supply enter it is soft fill 1 region when,
Adjust dead time td=5us, setting initial charge current Iavg=13A；When power supply enter it is soft fill 2 region when, adjust dead band when
Between td=8us, setting initial charge current Iavg=10A；When power supply enter it is soft fill 3 region when, adjust dead time td=10us,
Set initial charge current Iavg=8A；As sampled voltage UqMore than or equal to power source charges reference voltage UrefDuring=9kV, two close cycles
Control module produces up to value signal DZXH and is sent into controller, and controller, which receives, to carry out shutdown up to value signal and stop filling operation.
The charging effect of the utility model one embodiment is as shown in the B curves in Fig. 3, with conventional power source charging technique phase
For example shown in the A curves in Fig. 3, piecewise linearity capacitor charging power supply provided by the utility model can realize that piecewise linearity is filled
Electricity, at the initial stage of charging, capacitance voltage rapid increase is consistent with tradition charging.It is gradual in latter stage of charging, the capacitance voltage rate of climb
Reduce, realize steadily up to the purpose of value.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (3)
1. a kind of piecewise linearity capacitor constant-current charging power, including primary side full-bridge series resonance module, secondary rectification module, survey
Measure sampling module, double-closed-loop control module, controller and drive module；The primary side full-bridge series resonance module is by the first power
Switching tube S1, the second power switch tube S 2, the 3rd power switch tube S 3, the 4th power switch tube S 4, resonant inductance Lr, resonance electricity
Hold CrComposition；The secondary rectification module is by the first commutation diode D1, the second commutation diode D2, the 3rd commutation diode
D3, the 4th commutation diode D4, energy-storage capacitor CqComposition；It is characterized in that：The measurement sampling module is by for sampling electricity
The Hall current ring Rwsi of stream and the first voltage grading resistor R1, the second voltage grading resistor R2 composition for sampled voltage, Hall
Electric current loop is connected in the resonance circuit of primary side full-bridge series resonance module；First voltage grading resistor R1, the second voltage grading resistor
The energy-storage capacitor C of secondary rectification module is parallel to after R2 series connectionqBoth ends；The double-closed-loop control module connection measurement sampling mould
Block and controller, using voltage and current Dual-loop feedback control mode, for sample rate current, the sampling of sampling module collection will to be measured
Voltage is sent into controller；The controller connection double-closed-loop control module and drive module, for power source charges to be divided into soon
Fast charged area and soft charge region, the controlling dead error time produces drive signal and start charging shutdown stops filling operation；The drive
Dynamic model block connects controller and primary side full-bridge series resonance module, for amplifying and being sent to drive signal caused by controller
Primary side full-bridge series resonance module.
A kind of 2. piecewise linearity capacitor constant-current charging power according to claim 1, it is characterised in that：The two close cycles
Control module also includes being used to produce the voltage comparator up to value signal, and voltage comparator output end is connected with controller, inputs
End is connected to the centre of the first divider resistance R1 and the second divider resistance R2 series connection, and the input of voltage comparator is also associated with electricity
Source charge reference voltage Uref。
A kind of 3. piecewise linearity capacitor constant-current charging power according to claim 1 or 2, it is characterised in that：The control
Device processed is additionally operable to soft charge region division being more than 1 into n sections, n.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040022A (en) * | 2017-05-02 | 2017-08-11 | 中国工程物理研究院激光聚变研究中心 | A kind of piecewise linearity capacitor constant-current charging power |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107040022A (en) * | 2017-05-02 | 2017-08-11 | 中国工程物理研究院激光聚变研究中心 | A kind of piecewise linearity capacitor constant-current charging power |
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