CN111769743A - Double-circuit charging circuit controlled by one transformer and control method thereof - Google Patents
Double-circuit charging circuit controlled by one transformer and control method thereof Download PDFInfo
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- CN111769743A CN111769743A CN202010633936.3A CN202010633936A CN111769743A CN 111769743 A CN111769743 A CN 111769743A CN 202010633936 A CN202010633936 A CN 202010633936A CN 111769743 A CN111769743 A CN 111769743A
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- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims description 26
- 238000004804 winding Methods 0.000 claims description 23
- 230000000295 complement effect Effects 0.000 claims description 16
- 230000009977 dual effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 210000004899 c-terminal region Anatomy 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33561—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having more than one ouput with independent control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- 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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
-
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention relates to the technical field of a whole electric vehicle charging control system, in particular to a transformer-controlled double-circuit charging circuit, which comprises an a-end conversion circuit, a b-end conversion circuit, a c-end conversion circuit and a transformer T connected with the three circuits, and also discloses a control method of the transformer-controlled double-circuit charging circuit, which comprises the following steps: s1: the controller compares the output voltage and the output current of the b terminal with given output values respectively and inputs the output voltage and the output current into a three-pole three-zero digital compensator network, and a result value is obtained, wherein the result value changes the switching period of the a terminal power switch tube and is used for controlling the on-off of the first group of power switches Q1 and Q4 and the second group of power switches Q2 and Q3 respectively; the invention can flexibly control the voltage of two ports by adopting one transformer, has accurate voltage regulation and strong anti-interference capability; meanwhile, the device has the advantages of small volume, low cost and light weight.
Description
Technical Field
The invention relates to the technical field of a whole electric vehicle charging control system, in particular to a transformer-controlled double-circuit charging circuit and a control method thereof.
Background
In recent years, new energy electric vehicles are used in large scale in the market, but still face the problems of high cost and short endurance mileage. Because the two charging systems are isolated, the voltage/current of the two ports is respectively controlled by 2 transformers in the prior art, and the problems of high cost and heavy weight are solved. Therefore, there is a need in the art to develop a charging circuit and a control method that can simultaneously control two isolated outputs with one transformer.
Disclosure of Invention
The present invention is directed to a transformer-controlled dual-path charging circuit and a control method thereof, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a transformer-controlled two-way charging circuit comprises an a-end conversion circuit, a b-end conversion circuit, a c-end conversion circuit, a transformer T connected with the three circuits, and controllers of all switches;
the a-end conversion circuit comprises a first pair of switching tubes in a region a, a second pair of switching tubes in a region a, a resonant capacitor Ca, a resonant inductor La and a voltage collector Va, wherein the first pair of switching tubes in the region a is Q1 and Q4, the second pair of switching tubes in the region a is Q2 and Q3, the Q1 and the Q3 are connected to one end of the resonant capacitor Ca, the other end of the resonant capacitor Ca is connected with one end of a-end circuit side winding Ta of the transformer T through the resonant inductor La, and the other end of Ta is respectively connected with Q2 and Q4;
the b-end conversion circuit comprises a first pair of switching tubes in a b area, a second pair of switching tubes in the b area, a resonant capacitor Cb, a resonant inductor Lb and a voltage acquisition and output current acquisition Vb, wherein the first pair of switching tubes in the b area are Q5 and Q8, the second pair of switching tubes in the b area are Q6 or Q7, the Q5 and the Q7 are connected to one end of the resonant capacitor Cb, the other end of the resonant capacitor Cb is connected with one end of a b-end circuit side winding Tb of the transformer T through the resonant inductor Lb, and the other end of the Tb is respectively connected with Q6 and Q8;
the C-end conversion circuit comprises a voltage acquisition unit, an output current acquisition unit, a capacitor C3 and a resonant inductor Lc, and further comprises a pair of follow current complementary switching tubes and a pair of output adjusting switching tubes, wherein the follow current complementary switching tubes are a switch Q10 and a switch Q9, the output adjusting switching tubes are a switch Q11 and a switch Q12, the Q11 and the Q12 are connected to the capacitor Lc, the Q11 is connected with the Q9, one end of the Q9, far away from the Q11, is sequentially connected with a circuit side winding Tc of a transformer T, a circuit side winding Td and a Q10, and one end of the Q10, far away from the circuit side winding Td, is connected with the Q12;
the controllers are electrically connected to Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, and Q12, respectively.
A control method of a transformer-controlled dual-path charging circuit comprises the following steps:
s1: the controller compares the output voltage and the output current of the b terminal with given output values respectively and inputs the output voltage and the output current into a three-pole three-zero digital compensator network, and a result value is obtained, wherein the result value changes the switching period of the a terminal power switch tube and is used for controlling the on-off of the first group of power switches Q1 and Q4 and the second group of power switches Q2 and Q3 respectively;
s2: the controller compares the collected C end output voltage and output current with given output values respectively, inputs the output voltage and output current into the three-pole three-zero digital compensator network, uses the obtained result value to take the minimum value, then uses the minimum value to compare with the winding current Ic collected by the C end, and inputs the difference value into the other three-pole three-zero digital compensator network, wherein a result value is obtained, and the Q11 turn-off time of the result value is determined.
Preferably, the loop compensation adopts 3P3Z (three-pole three-zero) loop compensation.
Preferably, the first pair of switch tubes in the a-zone is complementary to the second pair of switch tubes in the a-zone.
Preferably, the first pair of switch tubes in the b-area is complementary to the second pair of switch tubes in the b-area.
Compared with the prior art, the invention has the beneficial effects that: the invention can flexibly control the voltage of two ports by adopting one transformer, has accurate voltage regulation and strong anti-interference capability; meanwhile, the device has the advantages of small volume, low cost and light weight.
Drawings
FIG. 1 is a hardware circuit diagram of the present invention;
FIG. 2 is a control schematic of the present invention;
FIG. 3 is a timing diagram of wave generation according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
The invention provides a technical scheme that: a transformer-controlled two-way charging circuit comprises an a-end conversion circuit, a b-end conversion circuit, a c-end conversion circuit, a transformer T connected with the three circuits, and controllers of all switches;
the a-end conversion circuit comprises a first pair of switching tubes in a region a, a second pair of switching tubes in a region a, a resonant capacitor Ca, a resonant inductor La and a voltage collector Va, wherein the first pair of switching tubes in the region a is Q1 and Q4, the second pair of switching tubes in the region a is Q2 and Q3, Q1 and Q3 are connected to one end of the resonant capacitor Ca, the other end of the resonant capacitor Ca is connected with one end of a-end circuit side winding Ta of the transformer T through the resonant inductor La, and the other end of Ta is respectively connected with Q2 and Q4;
the b-end conversion circuit comprises a first pair of switching tubes in a b area, a second pair of switching tubes in the b area, a resonant capacitor Cb, a resonant inductor Lb and a voltage acquisition and output current acquisition Vb, wherein the first pair of switching tubes in the b area are Q5 and Q8, the second pair of switching tubes in the b area are Q6 or Q7, Q5 and Q7 are connected to one end of the resonant capacitor Cb, the other end of the resonant capacitor Cb is connected with one end of a b-end circuit side winding Tb of the transformer T through the resonant inductor Lb, and the other end of Tb is respectively connected with Q6 and Q8; the C-end conversion circuit comprises a voltage acquisition and output current acquisition Vc, a capacitor C3 and a resonant inductor Lc, the C-end conversion circuit further comprises a pair of follow current complementary switch tubes and a pair of output adjusting switch tubes, the follow current complementary switch tubes are a switch Q10 and a switch Q9, the output adjusting switch tubes are a switch Q11 and a switch Q12, Q11 and Q12 are connected to the Lc, the Q11 is connected with the Q9, one end, far away from the Q11, of the Q9 is sequentially connected with a circuit side winding Tc of a transformer T, a circuit side winding Td and a Q10, and one end, far away from the circuit side winding Td, of the Q10 is connected with the Q12;
the controller is electrically connected to Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, and Q12, respectively.
A control method of a transformer-controlled dual-path charging circuit comprises the following steps:
s1: the controller compares the output voltage and the output current of the b terminal with given output values respectively and inputs the output voltage and the output current into a three-pole three-zero digital compensator network, and a result value is obtained, wherein the result value changes the switching period of the a terminal power switch tube and is used for controlling the on-off of the first group of power switches Q1 and Q4 and the second group of power switches Q2 and Q3 respectively;
s2: the controller compares the collected C end output voltage and output current with given output values respectively, inputs the output voltage and output current into the three-pole three-zero digital compensator network, uses the obtained result value to take the minimum value, then uses the minimum value to compare with the winding current Ic collected by the C end, and inputs the difference value into the other three-pole three-zero digital compensator network, wherein a result value is obtained, and the Q11 turn-off time of the result value is determined.
Wherein: the loop compensation adopts 3P3Z (three-pole three-zero) loop compensation. The first pair of switch tubes in the area a is complementary with the second pair of switch tubes in the area a. The first pair of switch tubes in the b area is complementary with the second pair of switch tubes in the b area.
Referring to fig. 1, a hardware circuit diagram is shown, which includes an a-terminal converting circuit, a b-terminal converting circuit, a c-terminal converting circuit, and a transformer T connecting the three circuits; the circuit of b end of this charging circuit will charge for high-voltage power battery, and the circuit of c end also will be supplied power for interior low pressure 14V consumer of car simultaneously.
The a-terminal conversion circuit is provided with a first pair of switching tubes Q1 and Q4 in a region a and a second pair of switching tubes Q2 and Q3 in a region a, and the two groups of power switches are driven to be complementary; the b end is provided with a first pair of switching tubes Q5 and Q8 in a b area and a second pair of switching tubes Q6 and Q7 in a b area, and the two groups of power switching tubes are driven to be complementary; the c-side circuit has a switch Q10 and a switch Q9 that drives the complement.
In fig. 1, Q5, Q6, Q7 and Q8 are switching tubes in a b-end circuit, Ca and La are resonant capacitors and resonant inductors in an a-end conversion circuit, Cb and Lb are resonant capacitors and resonant inductors in a b-end conversion circuit, and Lc and C3 are inductors and capacitors in a C-end conversion circuit.
T1 is a transformer, where Ta is a-end circuit side winding, Tb is b-end circuit side winding, Tc and Td are c-end circuit side windings, and La in fig. 1 can be the leakage inductance of T1.
Referring to the control schematic diagram shown in fig. 2, the controller compares the output voltage and output current at the b terminal with the given output values respectively, inputs the output voltage and output current into the three-pole three-zero digital compensator network, uses the obtained result value to obtain the minimum value, and uses the minimum value and the a terminal to collect
Comparing the current Ia of the incoming winding, inputting the difference into another three-pole three-zero digital compensator network, and obtaining a result value, wherein the result value changes the switching period of the power switch tube at the a end, but the duty ratio is fixed to be 50%, and is respectively used for controlling the on-off of the first group of power switches Q1 and Q4 and the second group of power switches Q2 and Q3;
referring to the timing diagram of the wave generation shown in fig. 3, the driving of the first and second sets of power switches are complementary. The controller determines the turn-on time of Q5 and Q8 by adding a delay time to the turn-on time of the first group of power switches Q1 and Q4, and determines the turn-off time of Q5 and Q8 by subtracting a delay time from the turn-off time of the first group of power switches Q1 and Q4; similarly, the on and off timings of the second set of power switches Q2, Q3 determine the on and off timings of Q6, Q7.
In the C-terminal output circuit, referring to the wave-generating time sequence diagram shown in fig. 3, the on and off timings of the switching tubes Q9 and Q10 correspond to the timings of Q5 and Q6, respectively, the on timing of the switching tube Q11 is the same as the on timings of Q9 and Q10, the output voltage and the output current of the C terminal are acquired and compared with the given output values, and then input to the digital compensator network of the three-pole three-zero point, the minimum value is obtained by using the acquired result value, then the minimum value is compared with the winding current Ic acquired by the C terminal, and the difference value is input to the digital compensator network of the other three-pole three-zero point, wherein a result value is obtained, which determines the off timing of Q11, and the on and off timings of Q12 are opposite to those of Q11.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A transformer controlled dual-path charging circuit, comprising: the transformer T comprises an a-end conversion circuit, a b-end conversion circuit, a c-end conversion circuit, a transformer T connected with the three circuits, and a controller of each switch;
the a-end conversion circuit comprises a first pair of switching tubes in a region a, a second pair of switching tubes in a region a, a resonant capacitor Ca, a resonant inductor La and a voltage collector Va, wherein the first pair of switching tubes in the region a is Q1 and Q4, the second pair of switching tubes in the region a is Q2 and Q3, the Q1 and the Q3 are connected to one end of the resonant capacitor Ca, the other end of the resonant capacitor Ca is connected with one end of a-end circuit side winding Ta of the transformer T through the resonant inductor La, and the other end of Ta is respectively connected with Q2 and Q4;
the b-end conversion circuit comprises a first pair of switching tubes in a b area, a second pair of switching tubes in the b area, a resonant capacitor Cb, a resonant inductor Lb and a voltage acquisition and output current acquisition Vb, wherein the first pair of switching tubes in the b area are Q5 and Q8, the second pair of switching tubes in the b area are Q6 or Q7, the Q5 and the Q7 are connected to one end of the resonant capacitor Cb, the other end of the resonant capacitor Cb is connected with one end of a b-end circuit side winding Tb of the transformer T through the resonant inductor Lb, and the other end of the Tb is respectively connected with Q6 and Q8;
the C-end conversion circuit comprises a voltage acquisition unit, an output current acquisition unit, a capacitor C3 and a resonant inductor Lc, and further comprises a pair of follow current complementary switching tubes and a pair of output adjusting switching tubes, wherein the follow current complementary switching tubes are a switch Q10 and a switch Q9, the output adjusting switching tubes are a switch Q11 and a switch Q12, the Q11 and the Q12 are connected to the capacitor Lc, the Q11 is connected with the Q9, one end of the Q9, far away from the Q11, is sequentially connected with a circuit side winding Tc of a transformer T, a circuit side winding Td and a Q10, and one end of the Q10, far away from the circuit side winding Td, is connected with the Q12;
the controllers are electrically connected to Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, and Q12, respectively.
2. A method of controlling a transformer controlled dual charging circuit according to claim 1, comprising the steps of:
s1: the controller compares the output voltage and the output current of the b terminal with given output values respectively and inputs the output voltage and the output current into a three-pole three-zero digital compensator network, and a result value is obtained, wherein the result value changes the switching period of the a terminal power switch tube and is used for controlling the on-off of the first group of power switches Q1 and Q4 and the second group of power switches Q2 and Q3 respectively;
s2: the controller compares the collected C end output voltage and output current with given output values respectively, inputs the output voltage and output current into the three-pole three-zero digital compensator network, uses the obtained result value to take the minimum value, then uses the minimum value to compare with the winding current Ic collected by the C end, and inputs the difference value into the other three-pole three-zero digital compensator network, wherein a result value is obtained, and the Q11 turn-off time of the result value is determined.
3. A transformer controlled two-way charging circuit according to claim 1, wherein: the loop compensation adopts 3P3Z (three-pole three-zero) loop compensation.
4. A transformer controlled two-way charging circuit according to claim 1, wherein: the first pair of switch tubes in the area a is complementary with the second pair of switch tubes in the area a.
5. A transformer controlled two-way charging circuit according to claim 1, wherein: the first pair of switch tubes in the b area is complementary with the second pair of switch tubes in the b area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010633936.3A CN111769743A (en) | 2020-07-02 | 2020-07-02 | Double-circuit charging circuit controlled by one transformer and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010633936.3A CN111769743A (en) | 2020-07-02 | 2020-07-02 | Double-circuit charging circuit controlled by one transformer and control method thereof |
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| CN111769743A true CN111769743A (en) | 2020-10-13 |
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