CN108418423A - DC booster converter control method based on electric voltage feed forward - Google Patents
DC booster converter control method based on electric voltage feed forward Download PDFInfo
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- CN108418423A CN108418423A CN201810155243.0A CN201810155243A CN108418423A CN 108418423 A CN108418423 A CN 108418423A CN 201810155243 A CN201810155243 A CN 201810155243A CN 108418423 A CN108418423 A CN 108418423A
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The DC booster converter control method based on electric voltage feed forward that the present invention provides a kind of, the control method include the following steps：Detect input voltage, output voltage, input current and the output current of DC booster converter；It calculates electric voltage feed forward duty ratio and uses PI closed loop algorithm calculating current duty ratios；Judge whether electric voltage feed forward duty ratio is less than the maximum voltage duty ratio of setting；If judging result is "Yes", final duty ratio is calculated according to current duty cycle and electric voltage feed forward duty ratio；If judging result is "No", final duty ratio is calculated according to current duty cycle and maximum voltage duty ratio and power tube based on final Duty ratio control DC booster converter switchs.The advantages of this method, is：Voltage feedforward control is increased on the basis of traditional electric current PI closed-loop control DC booster converters, it is suppressed that interference of the fuel cell output voltage fluctuation to electric current PI closed-loop controls improves the reaction speed of DC booster converter.
Description
Technical field
The present invention relates to a kind of control methods, in particular to a kind of DC booster converter based on electric voltage feed forward
Control method.
Background technology
Hydrogen fuel cell be it is a kind of hydrogen is reacted with oxygen generate chemical energy electric energy is directly changed by electrochemical reaction
Power generator, have many advantages, such as generating efficiency height, environmental pollution is small, is therefore widely used in automotive field.But hydrogen fires
Expect that the voltage of battery output is relatively low, needs to bring the voltage up by DC booster converter and provide power to meet for vehicle
Demand.DC booster converter should ensure that hydrogen fuel cell output is stablized, with support vehicles even running.Existing DC boosting
The method that converter uses current closed-loop feedback control ensures that hydrogen fuel cell electric current stablizes smooth output.Current closed-loop is anti-
The core of feedback control is that electric current PI is adjusted.Electric current PI is adjusted with the defeated of output current, that is, DC booster converter of hydrogen fuel cell
Enter the object that electric current is adjusted as loop PI, is converted by DC boosting while ensureing that hydrogen fuel cell stablizes output current
Device increases voltage output.This current closed-loop feedback control has in the case where power cell of vehicle scope range of the fluctuation of voltage is little
Preferable inhibition and reaction speed.
And in vehicle travel process, many extraneous factors, such as road conditions, vehicle braking, it all can be to power battery busbar
On voltage generate large effect, the input current in turn resulting in DC booster converter fluctuates.If power battery
Performance degradation it is serious, the maximum fluctuation range of output voltage can reach 100V or more, and current DC booster converter
The current closed-loop feedback control that the conventional current PI used is adjusted is when in face of power battery scope range of the fluctuation of voltage big situation, no
It can make a response in time to the variation of output voltage, cause hydrogen fuel cell that can not provide stable output current.
In summary, it is desirable to provide a kind of DC booster converter control method based on electric voltage feed forward has and inhibits
The characteristics of ability is strong, fast response time.
Invention content
The present invention is intended to provide a kind of DC booster converter control method based on electric voltage feed forward, can overcome existing
The defect of technology.The goal of the invention of the present invention is achieved by the following technical programs.
An embodiment of the invention provides a kind of DC booster converter control method based on electric voltage feed forward,
Described in control method include multiple steps：
Step 1：Detect input voltage V_in, the output voltage V_out of DC booster converter, input current I_in and defeated
Go out electric current I_out；
Step 2：Electric voltage feed forward duty ratio D_v is calculated, and uses PI closed loop algorithm calculating current duty ratios D_i；
Step 3：Judge whether electric voltage feed forward duty ratio D_v is less than the maximum voltage duty ratio D_max of setting；
Step 4：When the judging result of step 3 is "Yes", according to current duty cycle D_i and electric voltage feed forward duty ratio D_v
Calculate final duty ratio D；When the judging result of step 3 is "No", according to current duty cycle D_i and maximum voltage duty ratio D_
Max calculates final duty ratio D；
Step 5：The power tube switch of DC booster converter is controlled based on final duty ratio D.
The DC booster converter controlling party based on electric voltage feed forward that said one embodiment according to the present invention provides
Method, wherein the calculation formula of the electric voltage feed forward duty ratio D_v is D_v=(V_out -3.4 × V_in)/V_out.
The DC booster converter controlling party based on electric voltage feed forward that said one embodiment according to the present invention provides
Method, wherein the calculation formula of the current duty cycle D_i is Wherein Kp and Ki
For preset constant value, k indicates the number of current detection, and e (i) indicates target current value and input current when ith detection
Difference, e (k) indicate the difference of target current value and input current when current detection.
The DC booster converter controlling party based on electric voltage feed forward that said one embodiment according to the present invention provides
Method, when the judging result of step 3 is "Yes", the calculation formula of the final duty ratio D is D=D_v+D_i.
The DC booster converter controlling party based on electric voltage feed forward that said one embodiment according to the present invention provides
Method, when the judging result of step 3 is "No", the calculation formula of the final duty ratio D is D=D_max.
The DC booster converter controlling party based on electric voltage feed forward that said one embodiment according to the present invention provides
Method, wherein the DC booster converter includes concatenated prime booster circuit and rear class booster circuit, prime boosting electricity
Road is used to input voltage boosting to medium voltage, and rear class booster circuit is used to medium voltage being increased to output voltage, prime
In booster circuit, the both ends bridging of input voltage has prime input capacitance, the first inductance of prime and concatenated prime first switch
Across the both ends of input voltage, the first inductance of prime is connected across defeated with the first diode of concatenated prime and prime output capacitance at end
Enter the both ends of voltage, the second inductance of prime and concatenated prime second switch end across the both ends of input voltage, the second electricity of prime
Across the both ends of input voltage, rear class booster circuit includes first for sense and the second diode of concatenated prime and prime output capacitance
Mirror image circuit and the second mirror image circuit, the first mirror image circuit and the second mirror image circuit are connected across medium voltage two in a mirror-image fashion
End, in the first mirror image circuit, the first inductance of rear class is connected across the both ends of medium voltage with concatenated rear class first switch, rear class the
The output capacitance of one inductance and the first diode of concatenated rear class and the first mirror image circuit is connected across the both ends of medium voltage；Second
In mirror image circuit, the second inductance of rear class is connected across the both ends of medium voltage, the second inductance of rear class with concatenated rear class second switch
The both ends of medium voltage are connected across with the output capacitance of the second diode of concatenated rear class and the second mirror image circuit.
The DC booster converter controlling party based on electric voltage feed forward that said one embodiment according to the present invention provides
Method, wherein the rear class booster circuit conveys output voltage by rear class output capacitance.
The DC booster converter controlling party based on electric voltage feed forward that said one embodiment according to the present invention provides
Method, wherein the rear class booster circuit conveys output by the first output capacitance of rear class and the second output capacitance of rear class in parallel
Voltage.
The DC booster converter controlling party based on electric voltage feed forward that said one embodiment according to the present invention provides
Method is connected across medium voltage both ends wherein the prime booster circuit includes multiple prime output capacitances in parallel.
The DC booster converter controlling party based on electric voltage feed forward that said one embodiment according to the present invention provides
It is negative with medium voltage to be connected across output voltage anode wherein first mirror image circuit includes the output capacitance of multiple parallel connections for method
Between pole.
The DC booster converter controlling party based on electric voltage feed forward that said one embodiment according to the present invention provides
Method is connected across medium voltage anode and negative pole of output end wherein second mirror image circuit includes the output capacitance of multiple parallel connections
Between.
The DC booster converter controlling party based on electric voltage feed forward that said one embodiment according to the present invention provides
Method, wherein the output voltage passes through formula:Vout/Vin=1/ (1-Dq1) × (1+Dh3)/(1-Dh3) is calculated, wherein
Vin is input voltage, and Vout is output voltage, and Dq1 is the duty ratio of prime first switch, the duty ratio of prime second switch with
The duty ratio of prime first switch is equal, and Dh3 is the duty ratio of rear class first switch, the duty ratio and rear class of rear class second switch
The duty ratio of first switch is equal.
The DC booster converter controlling party based on electric voltage feed forward that said one embodiment according to the present invention provides
Method, wherein the inductance value of the first inductance of the prime is identical as the inductance value of the second inductance of prime, the inductance of the first inductance of prime
Amount and the size Lq of the inductance value of the second inductance of prime pass through formula:Vin=Lq × Δ iq/Dq carries out initial option, wherein Vin
For input voltage, Δ iq is the inductive current variable quantity for flowing through one of inductance, and Dq is that prime switchs in prime booster circuit
Turn-on time.
The DC booster converter controlling party based on electric voltage feed forward that said one embodiment according to the present invention provides
Method, wherein the inductance value of the first inductance of the rear class is identical as the inductance value of the second inductance of rear class, the inductance of the first inductance of rear class
Amount and the size Lh of the inductance value of the second inductance of rear class pass through formula:Vc=Lh × Δ ih/Dh carries out initial option, and wherein Vc is
Medium voltage, Δ ih are the current change quantity for flowing through wherein a inductance in rear class booster circuit, Dh be in rear class booster circuit after
The turn-on time of grade switch, medium voltage pass through formula:Vc/Vin=1/ (1-Dq1) is calculated, and Vin is input voltage, Dq1
Duty ratio for the duty ratio of prime first switch, prime second switch is equal with the duty ratio of prime first switch.
The advantages of DC booster converter control method based on electric voltage feed forward, is：In traditional electric current PI closed loop controls
Voltage feedforward control is increased on the basis of DC booster converter processed, and external environment pair is inhibited by voltage feedforward control
The interference of electric current PI closed-loop controls；When because of external environment big ups and downs occur for the output voltage of fuel cell, improve straight
The reaction speed for flowing booster converter, ensure that the steady output current of DC booster converter and voltage.
Description of the drawings
With reference to attached drawing, the disclosure will be easier to understand.Skilled addressee readily understands that be：This
A little attached drawings are used only for the technical solution illustrated the present invention, and are not intended to and are construed as limiting to protection scope of the present invention.
In figure：
Fig. 1 shows DC booster converter according to one embodiment of the present invention.
Fig. 2 shows the DC booster converter control methods based on electric voltage feed forward according to one embodiment of the present invention
Flow chart.
Specific implementation mode
Fig. 1-2 and following description describe the present invention optional embodiment to instruct how those skilled in the art implement
It is of the invention with reproducing.In order to instruct technical solution of the present invention, some conventional aspects are simplified or have been omitted.Those skilled in the art
It should be appreciated that modification or replacement from these embodiments will be within the scope of the present invention.Those skilled in the art answer
The understanding following characteristics can be combined in various ways to form multiple modifications of the present invention.As a result, the invention is not limited in
Following optional embodiments, and be only limited by the claims and their equivalents.
Fig. 1 shows DC booster converter according to one embodiment of the present invention.As shown in Figure 1, DC boosting becomes
Parallel operation includes concatenated prime booster circuit and rear class booster circuit, and wherein prime booster circuit is used for input voltage vin liter
It is pressed onto medium voltage Vc, rear class booster circuit is used to medium voltage Vc being increased to output voltage Vo.Prime input capacitance Cin across
The both ends of input voltage vin are connected on, prime the first inductance L1 and concatenated prime the first power tube switch sw1 is connected across input electricity
The both ends of Vin, prime the first inductance Ll and concatenated prime the first diode D1 and the first capacitance of prime Cl are pressed to be connected across input
The both ends of voltage Vin, prime the second inductance L2 are connected across input voltage vin with the ends concatenated prime the second power tube switch sw2
Both ends, prime the second inductance L2 and concatenated prime the second diode D2 and the first capacitance of prime C1 are connected across input voltage
The both ends of Vin, the second capacitance of prime C2, prime third capacitance C3, the 4th capacitance C4 of prime, the 5th capacitance C5 of prime and prime
Six capacitance C6 are in parallel with prime the first capacitance Cl and are connected across between the anode of medium voltage Vc and the cathode of input voltage vin,
Prime booster circuit may include that more prime capacitances are in parallel with prime the first capacitance C1 and be connected across the both ends of medium voltage Vc.
Prime input capacitance Cin is used to press progress voltage stabilizing and filtering to input dc power and to the current stabilization of input current, preceding
Grade the first power tube switch sw1 and the first diode of prime D1 for prime the first inductance L1 and prime the first capacitance C1 to preceding
The on and off of the 6th capacitance C6 of grade, prime the second power tube switch sw2 and the second diode of prime D2 are for prime the
The on and off of two inductance L2 and prime the first capacitance C1 to the 6th capacitance C6 of prime, the first capacitance of prime C1, prime second
Capacitance C2, prime third capacitance C3, the 4th capacitance C4 of prime, prime the 5th capacitance C5 and the 6th capacitance C6 of prime are used for prime
The voltage stabilizing and filtering of the output voltage of booster circuit simultaneously carry out current stabilization to output current.
Rear class booster circuit includes the first mirror image circuit, and the second mirror image circuit and rear class output capacitance group, wherein rear class are defeated
Go out capacitance group for conveying output voltage, the first mirror image circuit, the second mirror image circuit are connected across medium voltage Vc in a mirror-image fashion
Both ends, rear class output capacitance group is connected across the both ends of output voltage Vo, and the both ends of output voltage Vo can connect load.First
In mirror image circuit, rear class the first inductance L3 and concatenated rear class the first power tube switch sw3 is connected across the both ends of medium voltage Vc,
First capacitance Cx1 of rear class the first inductance L3 and concatenated rear class the first diode D3 and the first mirror image circuit is connected across intermediate electricity
Press the both ends of Vc, the second capacitance Cx2 and third capacitance Cx3 of the first mirror image circuit and the first capacitance Cx1 of the first mirror image circuit
In parallel and be connected across between the anode of output voltage Vo and the cathode of medium voltage Vc, the first mirror image circuit may include more
Capacitance it is in parallel with the first capacitance of the first mirror image circuit and be connected across the anode and the cathode of medium voltage Vc of output voltage Vo
Between.
In second mirror image circuit, rear class the second inductance L4 and concatenated rear class the second power tube switch sw4 are connected across centre
The both ends of voltage Vc, the first capacitance of rear class the second inductance L4 and concatenated rear class the second diode D4 and the second mirror image circuit
Cy1 is connected across the both ends of medium voltage Vc, the second capacitance Cy2 and third capacitance Cy3 of the second mirror image circuit and the second mirror image electricity
The first capacitance Cy1 on road is in parallel and is connected across between the anode of output voltage Vc and the cathode of medium voltage Vo, the second mirror image
Circuit may include that more capacitances are in parallel with the first capacitance of the second mirror mirror image circuit and be connected across the anode of medium voltage Vc
Between the cathode of output voltage Vo.
Rear class output capacitance group rear class the first output capacitance Col and rear class the second output capacitance Co2, the first output capacitance
The both ends of output voltage Vo are connected across after Col and rear class the second output capacitance Co2 parallel connections, rear class output capacitance group may include more
More rear class output capacitances is in parallel with the first output capacitance Col and is connected across the both ends of output voltage Vo, output voltage Vout's
Both ends can connect load.
Rear class the first power tube switch sw3 and the first diode of rear class D3 be used for rear class the first inductance L3 and with the first mirror
As the on and off of the first capacitance Cx1 to third capacitance Cx3 of circuit, rear class the second power tube switch sw4 and rear class second
Diode D4 be used for conducting to the first capacitance Cy1 to third capacitance Cy3 of rear class the second inductance L4 and the second mirror image circuit and
Cut-off.The first capacitance Cx1, the second capacitance Cx2, the third capacitance Cx3 of first mirror image circuit are used for the defeated of the first mirror image circuit
Go out voltage to carry out voltage stabilizing and filtering and carry out current stabilization to output current.The first capacitance Cy1, the second capacitance of second mirror image circuit
Cy2 and third capacitance Cy3 is used to carry out voltage stabilizing and filtering to the output voltage output voltage of the second mirror image circuit and to output electricity
Stream carries out current stabilization.The the first output capacitance Co1 and the second output capacitance Co2 of rear class output capacitance group are used for rear class booster circuit
Output DC voltage Vo carry out voltage stabilizing and filtering and current stabilization carried out to output current.
In DC booster converter shown in Fig. 1, the corresponding duty ratios of prime the first power tube switch sw1 are D1, preceding
The corresponding duty ratios of the second power tube switch sw2 of grade are 180 ° of D2, wherein D1=D2=64% and phase difference, the first work(of rear class
The corresponding duty ratios of rate pipe switch sw3 are D3, and the corresponding duty ratios of rear class the second power tube switch sw4 are D4, wherein D3=D4
=55% and phase differ 180 °, D1 is identical as the phase of D3.
In DC booster converter shown in Fig. 1, medium voltage Vc is boosted by input voltage vin, according to corresponding public affairs
Formula 1：Vc/Vin=1/ (1-D1) show that output voltage Vo is boosted by medium voltage Vc, according to correspondence formula 2：Vo/Vc=
(1+D3)/(1-D3's) goes out, according to the correspondence formula 3 of formula 1 and 2 output voltage Vo of formula and input voltage vin：
Vo/Vin=(1+D3)/(1-D3)/(1-D1) is indicated.
Fig. 2 shows the DC booster converter controlling parties based on electric voltage feed forward according to one embodiment of the present invention
Method, including multiple steps：
Step 1：Detect input voltage V_in, the output voltage V_out of DC booster converter, input current I_in and defeated
Go out electric current I_out；
Step 2：Electric voltage feed forward duty ratio D_v is calculated, calculation formula is D_v=(V_out -3.4 × V_in)/V_out, and
Using PI closed loop algorithm calculating current duty ratio D_i, calculation formula is Wherein
Kp and Ki is preset constant value, and k indicates that the number of current detection, e (i) indicate target current value and input when ith detection
The difference of electric current, e (k) indicate the difference of target current value and input current when current detection；
Step 3：Judge whether electric voltage feed forward duty ratio D_v is less than the maximum voltage duty ratio D_max of setting；
Step 4：When the judging result of step 3 is "Yes", according to current duty cycle D_i and electric voltage feed forward duty ratio D_v
Calculate final duty ratio D, calculation formula D=D_v+D_i；
Step 5：When the judging result of step 3 is "No", according to current duty cycle D_i and maximum voltage duty ratio D_
Max calculates final duty ratio D, calculation formula D=D_max；
Step 6：The power tube switch of DC booster converter is controlled based on final duty ratio D.
The advantages of DC booster converter control method based on electric voltage feed forward, is：In traditional electric current PI closed loop controls
Voltage feedforward control is increased on the basis of DC booster converter processed, and external environment pair is inhibited by voltage feedforward control
The interference of electric current PI closed-loop controls；When because of external environment big ups and downs occur for the output voltage of fuel cell, improve straight
The reaction speed for flowing booster converter, ensure that the steady output current of DC booster converter and voltage.
Indeed, it will be appreciated that although the description of front has been carried out in example through the invention, the present invention is done
Go out will be apparent to those skilled in the science it is such and other improvement and change be deemed to fall such as set forth herein
Broad range of the present invention in.Therefore, although the present invention reference has been made to preferred embodiment and be described, meaning
It is not that the equipment of tool novelty is made to be restricted therefrom, on the contrary, it is intended to include meeting part disclosed above, claim
Broad range within various improvement and equivalent modifications.
Claims (14)
1. a kind of DC booster converter control method based on electric voltage feed forward, which is characterized in that the control method includes more
A step：
Step 1：Detect input voltage V_in, the output voltage V_out of DC booster converter, input current I_in and output electricity
Flow I_out；
Step 2：Electric voltage feed forward duty ratio D_v is calculated, and uses PI closed loop algorithm calculating current duty ratios D_i；
Step 3：Judge whether electric voltage feed forward duty ratio D_v is less than the maximum voltage duty ratio D_max of setting；
Step 4：When the judging result of step 3 is "Yes", calculated according to current duty cycle D_i and electric voltage feed forward duty ratio D_v
Final duty ratio D；When the judging result of step 3 is "No", according to current duty cycle D_i and maximum voltage duty ratio D_max
Calculate final duty ratio D；
Step 5：The power tube switch of DC booster converter is controlled based on final duty ratio D.
2. the DC booster converter control method based on electric voltage feed forward as described in claim 1, which is characterized in that the electricity
The calculation formula of pressure feedforward duty ratio D_v is D_v=(V_out -3.4 × V_in)/V_out.
3. the DC booster converter control method based on electric voltage feed forward as described in claim 1, which is characterized in that the electricity
The calculation formula of stream duty ratio D_i isWherein Kp and Ki is preset constant
Value, k indicate that the number of current detection, e (i) indicate that the difference of target current value and input current, e (k) are indicated when ith detection
The difference of target current value and input current when current detection.
4. the DC booster converter control method based on electric voltage feed forward as described in claim 1, which is characterized in that work as step
When 3 judging result is "Yes", the calculation formula of the final duty ratio D is D=D_v+D_i.
5. the DC booster converter control method based on electric voltage feed forward as described in claim 1, which is characterized in that work as step
When 3 judging result is "No", the calculation formula of the final duty ratio D is D=D_max.
6. the DC booster converter control method based on electric voltage feed forward as described in claim 1, which is characterized in that described straight
Stream booster converter includes concatenated prime booster circuit and rear class booster circuit, and prime booster circuit will be for that will input electricity
Pressure boosts to medium voltage, and rear class booster circuit is used to medium voltage being increased to output voltage, in prime booster circuit, input
The both ends bridging of voltage has prime input capacitance, the first inductance of prime and concatenated prime first switch end across input voltage
Both ends, the first inductance of prime is connected across the both ends of input voltage with the first diode of concatenated prime and prime output capacitance, preceding
The second inductance of grade and concatenated prime second switch end are across the both ends of input voltage, the second inductance of prime and concatenated prime the
Across the both ends of input voltage, rear class booster circuit includes the first mirror image circuit and the second mirror for two diodes and prime output capacitance
As circuit, the first mirror image circuit and the second mirror image circuit are connected across medium voltage both ends in a mirror-image fashion, in the first mirror image circuit,
The first inductance of rear class is connected across the both ends of medium voltage, the first inductance of rear class and concatenated rear class with concatenated rear class first switch
The output capacitance of first diode and the first mirror image circuit is connected across the both ends of medium voltage；In second mirror image circuit, rear class
Two inductance are connected across the both ends of medium voltage, the second inductance of rear class and concatenated rear class the two or two with concatenated rear class second switch
Pole pipe and the output capacitance of the second mirror image circuit are connected across the both ends of medium voltage.
7. the DC booster converter control method based on electric voltage feed forward as claimed in claim 6, which is characterized in that after described
Grade booster circuit conveys output voltage by rear class output capacitance.
8. the DC booster converter control method based on electric voltage feed forward as claimed in claim 7, which is characterized in that after described
Grade booster circuit conveys output voltage by the first output capacitance of rear class and the second output capacitance of rear class in parallel.
9. the DC booster converter control method based on electric voltage feed forward as claimed in claim 6, which is characterized in that before described
Grade booster circuit includes multiple prime output capacitances of parallel connection, is connected across medium voltage both ends.
10. the DC booster converter control method based on electric voltage feed forward as claimed in claim 6, which is characterized in that described
First mirror image circuit includes the output capacitance of multiple parallel connections, is connected across between output voltage anode and medium voltage cathode.
11. the DC booster converter control method based on electric voltage feed forward as claimed in claim 6, which is characterized in that described
Second mirror image circuit includes the output capacitance of multiple parallel connections, is connected across between medium voltage anode and negative pole of output end.
12. the DC booster converter control method based on electric voltage feed forward as claimed in claim 6, which is characterized in that described
Output voltage passes through formula:Vout/Vin=1/ (1-Dq1)×(1+Dh3)/(1-Dh3) calculated, wherein VinFor input voltage,
VoutFor output voltage, Dq1For the duty ratio of prime first switch, the duty ratio of prime second switch and accounting for for prime first switch
Sky is than equal, Dh3For the duty ratio of rear class first switch, the duty ratio of the duty ratio and rear class first switch of rear class second switch
It is equal.
13. the DC booster converter control method based on electric voltage feed forward as claimed in claim 6, which is characterized in that described
The inductance value of the first inductance of prime is identical as the inductance value of the second inductance of prime, inductance value and the prime second of the first inductance of prime
The size L of the inductance value of inductanceqPass through formula:Vin=Lq×Δiq/DqCarry out initial option, wherein VinFor input voltage, Δ iq
To flow through the inductive current variable quantity of one of inductance, DqThe turn-on time switched for prime in prime booster circuit.
14. the DC booster converter control method based on electric voltage feed forward as claimed in claim 6, which is characterized in that described
The inductance value of the first inductance of rear class is identical as the inductance value of the second inductance of rear class, inductance value and the rear class second of the first inductance of rear class
The size L of the inductance value of inductancehPass through formula:Vc=Lh×Δih/DhCarry out initial option, wherein VcFor medium voltage, Δ ih
To flow through the current change quantity of wherein a inductance in rear class booster circuit, DhFor in rear class booster circuit rear class switch conducting when
Between, medium voltage passes through formula:Vc/Vin=1/ (1-Dq1) calculated, VinFor input voltage, Dq1For prime first switch
The duty ratio of duty ratio, prime second switch is equal with the duty ratio of prime first switch.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492551A (en) * | 2019-07-02 | 2019-11-22 | 珠海格力电器股份有限公司 | Fuel cell output circuit and its control method and control device |
| CN110970972A (en) * | 2019-11-22 | 2020-04-07 | 珠海格力电器股份有限公司 | Control method and device of DCDC converter, storage medium and power supply |
| CN113169358A (en) * | 2019-01-31 | 2021-07-23 | 潍柴动力股份有限公司 | Power control method and fuel cell control system |
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| CN105490527A (en) * | 2015-12-22 | 2016-04-13 | 西北工业大学 | Method for restraining 4-order Boost converter resonance |
| CN106787714A (en) * | 2017-01-06 | 2017-05-31 | 北京亿华通科技股份有限公司 | For tandem type hydrogen fuel cell DC booster converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113169358A (en) * | 2019-01-31 | 2021-07-23 | 潍柴动力股份有限公司 | Power control method and fuel cell control system |
| CN113169358B (en) * | 2019-01-31 | 2023-05-23 | 潍柴动力股份有限公司 | Power control method and fuel cell control system |
| CN110492551A (en) * | 2019-07-02 | 2019-11-22 | 珠海格力电器股份有限公司 | Fuel cell output circuit and its control method and control device |
| CN110970972A (en) * | 2019-11-22 | 2020-04-07 | 珠海格力电器股份有限公司 | Control method and device of DCDC converter, storage medium and power supply |
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