CN111786566A - Control circuit for wide voltage range output of charging pile - Google Patents
Control circuit for wide voltage range output of charging pile Download PDFInfo
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- CN111786566A CN111786566A CN202010720537.0A CN202010720537A CN111786566A CN 111786566 A CN111786566 A CN 111786566A CN 202010720537 A CN202010720537 A CN 202010720537A CN 111786566 A CN111786566 A CN 111786566A
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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
- H02M3/33569—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
- H02M3/33584—Bidirectional converters
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- 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
- B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
- H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
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- 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
- B60L2210/00—Converter types
- B60L2210/10—DC to DC converters
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The utility model provides a control circuit for filling wide voltage range output that simple structure just can adopt a machine to carry out safe charge-discharge for the car of many gears rated charging voltage under the condition that does not increase too many fund input. The high-low voltage switching network is arranged between the secondary transformer and the secondary resonant network, and can output 250-1000V voltage to the power output network in an adjustable manner through the secondary resonant network and the secondary switching network. The bidirectional charge-discharge conversion circuit can realize bidirectional charge-discharge conversion of wide voltage and constant power, is compatible with various mainstream electric vehicle types, and can realize that the power converter works in a narrower switching frequency range through intelligent identification and flexible switching of the system, reduce the loss of various power devices in the converter and improve the system efficiency and the reliability of the converter.
Description
Technical Field
The invention relates to an automobile charging pile, in particular to a circuit for controlling voltage output in the charging pile.
Background
With the rapid increase of the reserve of new energy automobiles, the scale of storable electric energy is huge, the electric automobiles are not only vehicles but also energy devices, the energy internet of motor vehicles is established, the bidirectional interaction of the automobile network is realized, and the electric automobiles can play a huge role in the dual regulation of the power and the energy of the power grid, wherein the research on charging and discharging equipment becomes the key point of the research of all countries. At present, electric automobiles are divided into a small car, a middle bus and a big bus, the voltages of batteries adopted by the small car, the middle bus and the big bus are different and are generally distributed in the voltage ranges of several gears of 300-350V,400-500V and 550-700V, and the traditional charging and discharging equipment selects different voltage output control circuits according to the constant power voltage ranges of different car types, so that the bidirectional wide-range constant power conversion cannot be realized, and the defects of limited equipment use, large capital investment of the charging equipment and the like are caused.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a control circuit for charging pile wide voltage range output, which is simple in structure and can safely charge and discharge a multi-gear rated charging voltage automobile by adopting one machine under the condition of not increasing too much capital investment.
In order to solve the technical problems, the invention adopts the technical scheme that:
the invention discloses a control circuit for wide voltage range output of a charging pile, which comprises an input power supply network, a primary side switch network, a primary side resonant network, a primary side transformer, a secondary side resonant network, a secondary side switch network and a power supply output network which are connected in sequence, and is characterized in that: and a high-low voltage switching network is arranged between the secondary transformer and the secondary resonant network, and the high-low voltage switching network can output 250-1000V voltage to the power output network in an adjustable manner through the secondary resonant network and the secondary switch network.
The high-low voltage switching network is composed of a switch group which is composed of three switches, the secondary side transformer is composed of two coil windings connected in series, wherein,
the switch K1 is connected between the different name end of the first coil winding and the same name end of the second coil winding of the secondary transformer;
a switch K2 connected between the dotted terminal of the first coil winding and the dotted terminal of the second coil winding;
and a switch K3 connected between the different name terminal of the first coil winding and the different name terminal of the second coil winding.
The primary side switch network, the primary side resonance network, the primary side transformer, the secondary side transformer, the high-low voltage switching network, the secondary side resonance network and the secondary side switch network are divided into two groups, wherein the two groups of primary side switch networks are connected in parallel, and the two groups of secondary side switch networks are connected in series.
The high-low voltage switching network consists of three switch groups, each switch group consists of three switches, the secondary transformer consists of four coil windings connected in series, wherein,
in the first switch group:
the switch K11 is connected between the different name end of the first coil winding and the same name end of the second coil winding of the secondary transformer;
a switch K12 connected between the dotted terminal of the first coil winding and the dotted terminal of the second coil winding;
a switch K13 connected between the synonym terminal of the first coil winding and the synonym terminal of the fourth coil winding, the switch K13 being further connected to the synonym terminal of the second coil winding and the synonym terminal of the third coil winding through a switch K23 in the second switch group and a switch K33 in the third switch group, respectively;
in the second switch group:
the switch K21 is connected between the synonym end of the second coil winding and the synonym end of the third coil winding of the secondary transformer;
the switch K22 is connected between the homonymous terminal of the first coil winding and the homonymous terminal of the third coil winding, and the switch K22 is also connected to the homonymous terminal of the second coil winding and the homonymous terminal of the fourth coil winding respectively through a switch K12 in the first switch group and a switch K32 in the third switch group;
a switch K23 connected between the synonym terminal of the second coil winding and the synonym terminal of the fourth coil winding, the switch K23 being further connected to the synonym terminal of the first coil winding and the synonym terminal of the third coil winding through a switch K13 in the first switch group and a switch K33 in the third switch group, respectively;
in the third switch group:
the switch K31 is connected between the synonym end of the third coil winding and the synonym end of the fourth coil winding of the secondary transformer;
the switch K32 is connected between the homonymous terminal of the first coil winding and the homonymous terminal of the fourth coil winding, and the switch K32 is also connected to the homonymous terminal of the second coil winding and the homonymous terminal of the third coil winding through the switch K12 in the first switch group and the switch K22 in the second switch group respectively;
and the switch K33 is connected between the synonym terminal of the third coil winding and the synonym terminal of the fourth coil winding, and the switch K33 is also connected to the synonym terminal of the first coil winding and the synonym terminal of the second coil winding respectively through the switch K13 in the first switch group and the switch K23 in the second switch group.
The primary side switch network and the secondary side switch network are both H-bridge circuits formed by four N-type MOS tubes.
Traditional two-way charge and discharge equipment will select different circuit structures according to the constant power voltage range of the motorcycle type of difference, can only realize narrow range constant power charge and discharge, is difficult to realize the constant power of wider scope and fills and discharge, and the main bottleneck lies in: traditional series resonance technique realizes the voltage output of wider range, must want higher switching frequency, leads to resonant current wave form poor, and magnetic core and wire winding loss increase, a series of problems such as the turn-off loss increase of switch, and system stability has very big risk.
The invention overcomes the limitation of narrow constant power voltage working range of the traditional bidirectional charge and discharge equipment, realizes the bidirectional charge and discharge conversion of wide voltage and constant power, is compatible with various mainstream electric vehicle types, realizes the work of the power converter in a narrower switching frequency range through intelligent identification and flexible switching of the system, has the waveform of the resonant current of a sine wave, reduces the loss of various power devices in the converter, and improves the system efficiency and the reliability of the converter. The output voltage can be adjusted in a wider range through a high-low voltage switching network.
Drawings
Fig. 1 is a block diagram of a control circuit of the present invention.
Fig. 2 is a schematic diagram of a control circuit of embodiment 1.
Fig. 3 is a schematic diagram of a control circuit of embodiment 2.
Fig. 4 is a schematic diagram of a control circuit of embodiment 3.
Detailed Description
As shown in fig. 1, the control circuit (also called converter) for wide voltage range output of the charging pile of the present invention is composed of an input power network, a primary switch network, a primary resonant network, a primary transformer, a secondary transformer, a high-low voltage switching network, a secondary resonant network, a secondary switch network, and a power output network, which are connected in sequence.
The input power supply network is used for accessing the voltage required by the control circuit.
The primary side switching network consists of an H-bridge circuit composed of four N-type MOS transistors, which are respectively S1, S2, S3, and S4, and the connection structure thereof is shown in fig. 2 and 3.
The primary resonant network consists of a filter inductor Lr1, a filter capacitor Cr1 and inductors Lm1, Lm2, Lm3 and Lm4 which are connected in parallel with the coil windings of the primary transformer, and the connection mode is shown in figures 2, 3 and 4.
The primary transformer and the secondary transformer each comprise at least two coil windings, as shown in fig. 2, 3 and 4.
The secondary side resonant network is composed of a resonant inductor Lr2 and a resonant capacitor Cr2, and the connection mode is shown in fig. 2, 3 and 4.
The secondary side switch network is composed of an H-bridge circuit composed of four N-type MOS transistors, which are respectively S5, S6, S7, and S8, and the connection structure thereof is shown in fig. 2 and 3.
The power output network is used for outputting voltage, and the output voltage is the terminal voltage of the load resistor Rout.
The invention is characterized in that: and a high-low voltage switching network is arranged between the secondary transformer and the secondary resonant network, and the high-low voltage switching network can output 250-1000V voltage to the power output network in an adjustable manner through the secondary resonant network and the secondary switch network.
The invention intelligently identifies the voltage of the rechargeable battery of the automobile to be charged, and utilizes the switch matrix to flexibly switch, so that the switch converter works at the optimal resonance working point.
There are several examples of the following:
example 1
As shown in fig. 2, the high-low voltage switching network is composed of a switch group composed of three switches, the secondary transformer is composed of two coil windings connected in series, wherein,
the switch K1 is connected between the different name end of the first coil winding and the same name end of the second coil winding of the secondary transformer;
a switch K2 connected between the end of the first coil winding Tr1 and the end of the second coil winding Tr 2;
the switch K3 is connected between the different-name terminal of the first coil winding Tr1 and the different-name terminal of the second coil winding Tr 2.
The output voltage of the power supply output network is controlled by controlling the opening and closing of the switch K1, the switch K2 and the switch K3 in the switch group.
When the output voltage needs to be set in a low-voltage mode (namely when the charging voltage required by the corresponding automobile battery to be charged is low), the switch K1 is switched off, the switch K2 and the switch K3 are switched on, at the moment, the primary windings of the transformer are connected in series, and the secondary windings are connected in parallel, according to a formula related to the transformer principle: uo & N & Ui, N & N2/N1 (where Uo is the transformer secondary output dc voltage, Ui is the transformer primary input voltage, N1, N2 are the turns of the transformer primary and secondary windings, respectively), the output voltage is lower than before the secondary winding is connected in parallel;
when the output voltage needs to be set in a high-voltage mode, the switch K1 is closed, the switch K2 and the switch K3 are disconnected, the primary windings of the transformer are connected in series, the secondary windings of the transformer are connected in series, and the output voltage is higher than the output voltage under the condition that the secondary windings are connected in parallel.
Example 2
As shown in fig. 3, in this embodiment, the number of the coil windings of the primary transformer and the number of the coil windings of the secondary transformer are four, and the connection manner between the four coil windings of the primary transformer and the corresponding inductors is shown in fig. 3. In this embodiment, the high-low voltage switching network is composed of three switch groups, each switch group is composed of three switches, the secondary side transformer is composed of four coil windings connected in series, wherein,
in the first switch group:
a switch K11 connected between the different name terminal of the first coil winding Tr1 and the same name terminal of the second coil winding Tr2 of the secondary transformer;
a switch K12 connected between the end of the first coil winding Tr1 and the end of the second coil winding Tr 2;
a switch K13 connected between the synonym terminal of the first coil winding Tr1 and the synonym terminal of the fourth coil winding Tr4, the switch K13 being further connected to the synonym terminal of the second coil winding Tr2 and the synonym terminal of the third coil winding Tr3 through a switch K23 in the second switch group and a switch K33 in the third switch group, respectively;
in the second switch group:
a switch K21 connected between the different name terminal of the second coil winding Tr2 and the same name terminal of the third coil winding Tr3 of the secondary transformer;
a switch K22 connected between the end of the first coil winding Tr1 and the end of the third coil winding Tr3, the switch K22 being further connected to the end of the second coil winding Tr2 and the end of the fourth coil winding Tr4, respectively, through a switch K12 in the first switch group and a switch K32 in the third switch group;
a switch K23 connected between the synonym terminal of the second coil winding Tr2 and the synonym terminal of the fourth coil winding Tr4, the switch K23 being further connected to the synonym terminal of the first coil winding Tr1 and the synonym terminal of the third coil winding Tr3 through a switch K13 in the first switch group and a switch K33 in the third switch group, respectively;
in the third switch group:
a switch K31 connected between the different name end of the third coil winding Tr3 and the same name end of the fourth coil winding Tr4 of the secondary transformer;
a switch K32 connected between the end of the first coil winding Tr1 and the end of the fourth coil winding Tr4, the switch K32 being further connected to the end of the second coil winding Tr2 and the end of the third coil winding Tr3, respectively, through a switch K12 in the first switch group and a switch K22 in the second switch group;
and a switch K33 connected between the different-name terminal of the third coil winding Tr3 and the different-name terminal of the fourth coil winding Tr4, wherein the switch K33 is further connected to the different-name terminal of the first coil winding Tr1 and the different-name terminal of the second coil winding Tr2 through a switch K13 in the first switch group and a switch K23 in the second switch group, respectively.
The electric vehicle will be developed in a higher voltage direction in the future, and if the output voltage meets the requirement of 1500V grade according to the voltage of the battery to be charged, the embodiment can realize the working target of wider range of constant power.
The present embodiment can obtain output voltages of three voltages, namely low voltage, medium voltage and high voltage as required, and the opening or closing mode of each switch is as follows:
1) when the output voltage needs to output a low-voltage mode, K11, K21 and K31 are disconnected, K12, K22, K32, K13, K23 and K33 are closed, primary windings of the transformers are connected in series, four coil windings of a secondary side are connected in parallel, and low voltage is output.
2) When the output voltage needs a medium-voltage mode, K11, K22, K23 and K31 are closed, K12, K13, K21, K32 and K33 are opened, primary windings of the transformer are connected in series, a first coil winding Tr1 and a second coil winding Tr2 are connected in series in four coil windings on a secondary side, a third coil winding Tr3 and a fourth coil winding Tr4 are connected in series, and then the two series circuits are connected in parallel through the closing of K22 and K23 to output the medium-voltage.
3) When the output voltage needs a high-voltage mode, K11, K21 and K31 are closed, K12, K22, K32, K13, K23 and K33 are opened, primary windings of the transformer are connected in series, four coil windings of a secondary side are connected in series, and high voltage is output.
Example 3
As shown in fig. 4, this embodiment is composed of two sets of control circuits described in embodiment 1, that is, the primary side switch network, the primary side resonant network, the primary side transformer, the secondary side transformer, the high-low voltage switching network, the secondary side resonant network, and the secondary side switch network are two sets, which are respectively called a first set of control circuit and a second set of control circuit, in the two sets of control circuits, two primary side switch networks are connected in parallel, and two secondary side switch networks are connected in series.
S1, S2, S3 and S4 in the first group of control circuits form a first primary side switch network, Lr1, Cr1, Lm 1-Lm 2 form a first primary side resonance network, Tr 1-Tr 2 and K1-K3 form a first secondary side transformer high-low voltage switching network, Cr _ sec, Lr _ sec and Tr 1-Tr 2 form a first secondary side resonance network, and S5, S6, S7 and S8 form a first secondary side switch network;
S9-S12 in the second group of control circuits form a second primary side switch network, Lr2, Cr2, Lm 3-Lm 4 form a second primary side resonance network, Tr 3-Tr 4 and K4-K6 form a second secondary side transformer high-low voltage switching network, Cr _ sec1, Lr _ sec1 and Tr 3-Tr 4 form a second secondary side resonance network, and S13, S14, S15 and S16 form a second secondary side switch network;
co, Co1 and Rout form the power output network of the circuit of this embodiment.
The first primary side switch network and the second primary side switch network work in a staggered mode of 180 degrees.
When the output power supply needs to be set in a low-voltage mode, K1 and K4 are switched off, K2, K3, K5 and K6 are switched on, two coil windings of a secondary side transformer of the first group of control circuits and the second group of control circuits are connected in parallel, and at the moment, the output voltage is Uo-n-Ui (n is the transformer pound ratio, and Uin is the input voltage);
when the output power supply needs to be set in the high-voltage mode, K1 and K4 are closed, K2, K3, K5 and K6 are opened, and two coil windings of the secondary side transformer of the first group of control circuits and the second group of control circuits are connected in series, so that the output voltage is Uo-2-n-Ui.
The invention changes the gain of a specific voltage area by adjusting the input voltage, the working frequency and controlling the continuous conduction of the switches (the relay and the switch tube), thereby improving the comprehensive conversion efficiency of the converter and realizing the effect of wide-range constant-power bidirectional direct current conversion. Therefore, the operation cost of operators can be reduced, and the energy waste is reduced.
Theoretically, when the LLC operates in a region near the resonant frequency, the conversion efficiency is the highest, and a high-efficiency voltage output region can be formed by adjusting the input voltage and the operating frequency.
Specifically, the input voltage range of the control circuit is set to be Uin _ min-Uin _ max, and the output voltage range is set to be Uo _ min-Uo _ max. When the converter works in the area near the resonant frequency, the optimal efficiency output voltage interval of the converter is Ua-Ub. When the converter works in a high-voltage mode, Ua is 0.5Uo _ max, Ub is Uo _ max, and when the converter works in a low-voltage mode, corresponding optimal efficiency working voltages of 0.5 Ua-0.5 Ub are obtained.
Claims (5)
1. The utility model provides a control circuit for filling output of electric pile wide voltage range, includes input power supply network, former limit switching network, former limit resonant network, former limit transformer, vice limit resonant network, vice limit switching network and the power output network that meets in proper order, its characterized in that: and a high-low voltage switching network is arranged between the secondary transformer and the secondary resonant network, and the high-low voltage switching network can output 250-1000V voltage to the power output network in an adjustable manner through the secondary resonant network and the secondary switch network.
2. The control circuit for charging pile wide voltage range output of claim 1, characterized in that: the high-low voltage switching network is composed of a switch group which is composed of three switches, the secondary side transformer is composed of two coil windings connected in series, wherein,
the switch K1 is connected between the different name end of the first coil winding and the same name end of the second coil winding of the secondary transformer;
a switch K2 connected between the dotted terminal of the first coil winding and the dotted terminal of the second coil winding;
and a switch K3 connected between the different name terminal of the first coil winding and the different name terminal of the second coil winding.
3. The control circuit for charging pile wide voltage range output of claim 2, characterized in that: the primary side switch network, the primary side resonance network, the primary side transformer, the secondary side transformer, the high-low voltage switching network, the secondary side resonance network and the secondary side switch network are divided into two groups, wherein the two groups of primary side switch networks are connected in parallel, and the two groups of secondary side switch networks are connected in series.
4. The control circuit for charging pile wide voltage range output of claim 1, characterized in that: the high-low voltage switching network consists of three switch groups, each switch group consists of three switches, the secondary transformer consists of four coil windings connected in series, wherein,
in the first switch group:
the switch K11 is connected between the different name end of the first coil winding and the same name end of the second coil winding of the secondary transformer;
a switch K12 connected between the dotted terminal of the first coil winding and the dotted terminal of the second coil winding;
a switch K13 connected between the synonym terminal of the first coil winding and the synonym terminal of the fourth coil winding, the switch K13 being further connected to the synonym terminal of the second coil winding and the synonym terminal of the third coil winding through a switch K23 in the second switch group and a switch K33 in the third switch group, respectively;
in the second switch group:
the switch K21 is connected between the synonym end of the second coil winding and the synonym end of the third coil winding of the secondary transformer;
the switch K22 is connected between the homonymous terminal of the first coil winding and the homonymous terminal of the third coil winding, and the switch K22 is also connected to the homonymous terminal of the second coil winding and the homonymous terminal of the fourth coil winding respectively through a switch K12 in the first switch group and a switch K32 in the third switch group;
a switch K23 connected between the synonym terminal of the second coil winding and the synonym terminal of the fourth coil winding, the switch K23 being further connected to the synonym terminal of the first coil winding and the synonym terminal of the third coil winding through a switch K13 in the first switch group and a switch K33 in the third switch group, respectively;
in the third switch group:
the switch K31 is connected between the synonym end of the third coil winding and the synonym end of the fourth coil winding of the secondary transformer;
the switch K32 is connected between the homonymous terminal of the first coil winding and the homonymous terminal of the fourth coil winding, and the switch K32 is also connected to the homonymous terminal of the second coil winding and the homonymous terminal of the third coil winding through the switch K12 in the first switch group and the switch K22 in the second switch group respectively;
and the switch K33 is connected between the synonym terminal of the third coil winding and the synonym terminal of the fourth coil winding, and the switch K33 is also connected to the synonym terminal of the first coil winding and the synonym terminal of the second coil winding respectively through the switch K13 in the first switch group and the switch K23 in the second switch group.
5. The control circuit for charging pile wide voltage range output according to any one of claims 1-4, characterized in that: the primary side switch network and the secondary side switch network are both H-bridge circuits formed by four N-type MOS tubes.
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| CN202010720537.0A CN111786566A (en) | 2020-07-24 | 2020-07-24 | Control circuit for wide voltage range output of charging pile |
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| CN112583134A (en) * | 2020-12-01 | 2021-03-30 | 浙江大学 | Variable circuit topology capable of switching wireless power transmission coil and compensation capacitor |
| CN113839557A (en) * | 2021-08-24 | 2021-12-24 | 深圳航天科技创新研究院 | Wide voltage range boost conversion topology |
| CN113890367A (en) * | 2021-08-25 | 2022-01-04 | 深圳航天科技创新研究院 | Reconfigurable resonance type wide-voltage-range power converter circuit |
| CN114244172A (en) * | 2021-12-03 | 2022-03-25 | 合肥科威尔电源***股份有限公司 | Power grid simulation power supply and use method thereof |
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| CN112583134A (en) * | 2020-12-01 | 2021-03-30 | 浙江大学 | Variable circuit topology capable of switching wireless power transmission coil and compensation capacitor |
| CN113839557A (en) * | 2021-08-24 | 2021-12-24 | 深圳航天科技创新研究院 | Wide voltage range boost conversion topology |
| CN113839557B (en) * | 2021-08-24 | 2024-04-09 | 深圳航天科技创新研究院 | Boost conversion topology with wide voltage range |
| CN113890367A (en) * | 2021-08-25 | 2022-01-04 | 深圳航天科技创新研究院 | Reconfigurable resonance type wide-voltage-range power converter circuit |
| CN114244172A (en) * | 2021-12-03 | 2022-03-25 | 合肥科威尔电源***股份有限公司 | Power grid simulation power supply and use method thereof |
| CN114244172B (en) * | 2021-12-03 | 2023-06-20 | 科威尔技术股份有限公司 | Power grid analog power supply |
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