CN112713779A - Wide-voltage-range online gear switching method and system and direct-current module - Google Patents
Wide-voltage-range online gear switching method and system and direct-current module Download PDFInfo
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- CN112713779A CN112713779A CN202011484043.3A CN202011484043A CN112713779A CN 112713779 A CN112713779 A CN 112713779A CN 202011484043 A CN202011484043 A CN 202011484043A CN 112713779 A CN112713779 A CN 112713779A
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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
- H02M3/3353—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 at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The application relates to a wide voltage range on-line gear-switching method, a wide voltage range on-line gear-switching system and a wide voltage range on-line gear-switching DC module, wherein the DC module comprises a DC power supply, a switching circuit, a resonant circuit and a rectifying circuit, the resonant circuit comprises a resonant module and a transformer module, the switching circuit comprises a first switching module and a second switching module, the first switching module and the second switching module respectively comprise a plurality of switching tubes, a control device is used for monitoring the first voltage of a charging load in real time, under the condition that the first voltage is greater than the preset voltage upper limit value of the DC module or less than the preset voltage lower limit value, the control device sends a control signal to the switching circuit, the switching circuit enables the voltage of the DC module to be converted into the second voltage from the preset voltage by adjusting the driving of the switching tubes, and the problem that the traditional DC module needs to be shut down and reset to realize wide voltage switching is solved through the application, the wide voltage on-line switching of the direct current module is realized, and the charging efficiency of the direct current module is improved.
Description
Technical Field
The application relates to the field of electronic power, in particular to a wide-voltage-range online gear switching control method, a wide-voltage-range online gear switching control system and a direct current module.
Background
With the advent of various charging products, charging technologies corresponding to the charging products become mature day by day, and manufacturers of the charging products have different charging standards, for example, charging voltages of electric vehicles manufactured by different manufacturers are different, even if the electric vehicles are the same type, the charging voltages of the electric vehicles may be different, and a direct current module with a wide voltage range, which is generally used for charging, is configured to achieve constant power output by power-off reset, that is, in a charging process, when a working mode is switched, the direct current module is generally configured to be re-configured with the voltage range after power-off, and then is started. This may result in a reduction in charging efficiency, and may also create some additional risks.
In the related art, an effective solution is not provided at present for the problem that the charging efficiency is reduced due to the fact that a general direct current module with a wide voltage range realizes constant power output through shutdown reset.
Disclosure of Invention
The embodiment of the application provides a wide-voltage-range online gear-switching method, a wide-voltage-range online gear-switching system and a direct-current module, and aims to at least solve the problem that the charging efficiency is reduced because a common direct-current module realizes constant power output through shutdown reset in the related art.
In a first aspect, an embodiment of the present application provides a wide voltage range online gear-shifting dc module, where the dc module includes a dc power supply, a switching circuit, a resonant circuit, and a rectifying circuit, where the resonant circuit includes a resonant module and a transformer module, the switching circuit includes a first switching module and a second switching module, and each of the first switching module and the second switching module includes a plurality of switching tubes;
the control device monitors a first voltage of a charging load in real time, and sends a control signal to the switch circuit when the first voltage is larger than a preset voltage upper limit value or smaller than a preset voltage lower limit value of the direct current module, the switch circuit changes the number of turns of a secondary coil of the transformer module by adjusting the driving of the switch tube, and the voltage of the direct current module is converted into a second voltage from the preset voltage.
In some embodiments, in the case that the first switch module and the second switch module are full-bridge switch modules, the first switch module includes a first switch tube, a second switch tube, a third switch tube and a fourth switch tube, and the second switch module includes a fifth switch tube, a sixth switch tube, a seventh switch tube and an eighth switch tube;
the phase shift angle of the switching circuit is a first preset value, and the current working mode of the direct current module is a first working mode; in the case that the first voltage is greater than an upper limit value of the preset voltage, the changing, by the switching circuit, the number of turns of the secondary coil of the transformer module by adjusting the driving of the switching tube includes: enabling the first switching tube to be driven the same as the fifth switching tube, the second switching tube to be driven the same as the sixth switching tube, the third switching tube to be driven the same as the seventh switching tube, the fourth switching tube to be driven the same as the eighth switching tube, converting the voltage of the direct current module from the preset voltage to the second voltage, and switching the direct current module from the first working mode to the second working mode;
the phase shift angle of the switch circuit is a second preset value, and the current working mode of the direct current module is a second working mode; in the case that the first voltage is less than a lower limit value of the preset voltage, the changing, by the switching circuit, the number of turns of the secondary coil of the transformer module by adjusting the driving of the switching tube includes: the first switching tube and the fifth switching tube are driven to complement each other, the second switching tube and the sixth switching tube are driven to complement each other, the third switching tube and the seventh switching tube are driven to complement each other, the fourth switching tube and the eighth switching tube are driven to complement each other, the voltage of the direct current module is converted into the second voltage from the preset voltage, and the direct current module is switched into the first working mode from the second working mode.
In a second aspect, an embodiment of the present application provides a system for online gear shifting in a wide voltage range, where the system includes a dc module and a control device, where the dc module includes a dc power supply, a switching circuit, a resonant circuit, and a rectifying circuit, where the resonant circuit includes a resonant module and a transformer module, the switching circuit includes a first switching module and a second switching module, and each of the first switching module and the second switching module includes a plurality of switching tubes;
the control device monitors a first voltage of a charging load in real time, and sends a control signal to the switch circuit when the first voltage is larger than a preset voltage upper limit value or smaller than a preset voltage lower limit value of the direct current module, the switch circuit changes the number of turns of a secondary coil of the transformer module by adjusting the driving of the switch tube, and the voltage of the direct current module is converted into a second voltage from the preset voltage.
In some embodiments, the dc power supply includes a power factor corrector, and converting the voltage of the dc module from the preset voltage to a second voltage includes: and the control device calculates the output voltage of the direct current power supply according to the preset voltage and the coil turn ratio of the transformer module under the condition that the voltage of the direct current module is the second voltage, and sends the output voltage to the power factor corrector through a communication serial port, and the power factor corrector adjusts the output voltage of the direct current power supply to assist the voltage of the direct current module to be converted into the second voltage from the preset voltage. In a third aspect, an embodiment of the present application provides an online gear shifting method in a wide voltage range, where the method is applied to a dc module, and the dc module includes a dc power supply, a switching circuit, a resonant circuit, and a rectifying circuit, where the resonant circuit includes a resonant module and a transformer module, the switching circuit includes a first switching module and a second switching module, and each of the first switching module and the second switching module includes a plurality of switching tubes; the method comprises the following steps:
the control device monitors a first voltage of a charging load in real time, and sends a control signal to the switch circuit when the first voltage is larger than a preset voltage upper limit value or smaller than a preset voltage lower limit value of the direct current module, the switch circuit changes the number of turns of a secondary coil of the transformer module by adjusting the driving of the switch tube, and the voltage of the direct current module is converted into a second voltage from the preset voltage.
In some embodiments, in a case where the first switch module and the second switch module are full-bridge switch modules, the first switch module includes a first switch tube, a second switch tube, a third switch tube and a fourth switch tube, the second switch module includes a fifth switch tube, a sixth switch tube, a seventh switch tube and an eighth switch tube, and the method for changing the number of turns of the secondary coil of the transformer module by adjusting the driving of the switch tubes includes:
the phase shift angle of the switching circuit is a first preset value, and the current working mode of the direct current module is a first working mode; when the first voltage is greater than the upper limit value of the preset voltage, the control device sends a control signal to the switching circuit, and the switching circuit changes the number of turns of the secondary coil of the transformer module by adjusting the driving of the switching tube, wherein the control signal comprises: enabling the first switching tube to be driven the same as the fifth switching tube, the second switching tube to be driven the same as the sixth switching tube, the third switching tube to be driven the same as the seventh switching tube, the fourth switching tube to be driven the same as the eighth switching tube, converting the voltage of the direct current module from the preset voltage to the second voltage, and switching the current working mode from the first working mode to the second working mode;
the phase shift angle of the switching circuit is a second preset value, and the current working mode of the direct current module is a second working mode; in a case where the first voltage is less than a lower limit value of the preset voltage, the control device sends a control signal to the switching circuit, and the switching circuit changes the number of turns of the secondary coil of the transformer module by adjusting the driving of the switching tube includes: the first switching tube and the fifth switching tube are driven to complement each other, the second switching tube and the sixth switching tube are driven to complement each other, the third switching tube and the seventh switching tube are driven to complement each other, the fourth switching tube and the eighth switching tube are driven to complement each other, the voltage of the direct current module is converted into the second voltage from the preset voltage, and the current working mode is switched into the first working mode from the second working mode.
In some embodiments, the first preset value of the phase shift angle of the switching circuit is 180 degrees, and the preset voltage range of the dc module is 200 v to 335 v; a second preset value of the phase shift angle of the switching circuit is 0 degree, and the preset voltage range of the direct current module is 335 volts to 500 volts.
In some of these embodiments, the control device sending a control signal to the switching circuit includes: and after the first voltage is greater than the upper limit value of the preset voltage in the first working mode or the first voltage is less than the lower limit value of the preset voltage in the second working mode and lasts for a preset time period, the control device sends a control signal to the switch circuit.
In some embodiments, the controlling device monitoring the first voltage of the charging load in real time includes: the control device acquires the first voltage of the charging load through a battery management system for monitoring the charging load in real time.
In some embodiments, the dc power supply includes a power factor corrector, and converting the voltage of the dc module from the preset voltage to a second voltage includes: and the control device calculates the output voltage of the direct current power supply according to the preset voltage and the coil turn ratio of the transformer module under the condition that the voltage of the direct current module is the second voltage, and sends the output voltage to the power factor corrector through a communication serial port, and the power factor corrector adjusts the output voltage of the direct current power supply to assist the voltage of the direct current module to be converted into the second voltage from the preset voltage.
Compared with the prior art, the wide voltage range online gear switching method, the wide voltage range online gear switching system and the direct current module have the advantages that the first voltage of the charging load is monitored in real time through the control device, the control device sends the control signal to the switch circuit under the condition that the first voltage is larger than the upper limit value of the preset voltage of the direct current module or smaller than the lower limit value of the preset voltage, the number of turns of the secondary coil of the transformer module is changed by the switch circuit through adjusting the driving of the switch tube, the voltage of the direct current module is converted into the second voltage from the preset voltage, the problem that the traditional direct current module needs to be shut down and reset to achieve wide voltage switching is solved, the wide voltage online switching of the direct current module is achieved, and the charging efficiency of the direct current module is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a block diagram of a dc module according to an embodiment of the present application;
fig. 2 is a block diagram of a circuit structure of a dc module according to an embodiment of the present application;
FIG. 3 is a flow chart of wide voltage on-line switching of a DC module according to an embodiment of the present application;
FIG. 4 is a block diagram of a circuit configuration of a DC module according to a preferred embodiment of the present application;
fig. 5 is a flow chart of the dc module wide voltage on-line switching according to the preferred embodiment of the present application.
Description of the drawings: 11. a direct current power supply; 12. a switching circuit; 13. a resonant circuit; 14. a rectifying circuit; 15. A resonance module; 16. a transformer module; 17. a first switch module; 18. a second switch module; 21. a first switch tube; 22. a second switching tube; 23. a third switching tube; 24. a fourth switching tube; 25. a fifth switching tube; 26. a sixth switching tube; 27. a seventh switching tube; 28. an eighth switching tube; 29. a first transformer; 30. a second transformer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.
It is obvious that the drawings in the following description are only examples or embodiments of the present application, and that it is also possible for a person skilled in the art to apply the present application to other similar contexts on the basis of these drawings without inventive effort. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as referred to herein means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
The present embodiment provides a wide voltage range on-line gear shifting control direct current module, fig. 1 is a structural block diagram of a direct current module according to an embodiment of the present application, and as shown in fig. 1, the direct current module includes a direct current power supply 11, a switching circuit 12, a resonant circuit 13 and a rectification circuit 14, where the resonant circuit 13 includes a resonant module 15 and a transformer module 16, the switching circuit 12 includes a first switching module 17 and a second switching module 18, and each of the first switching module 17 and the second switching module 18 includes a plurality of switching tubes;
the control device monitors a first voltage of the charging load in real time, and sends a control signal to the switch circuit 12 when the first voltage is larger than a preset voltage upper limit value of the direct current module or smaller than a preset voltage lower limit value, the switch circuit 12 changes the number of turns of a secondary coil of the transformer module 16 by adjusting the driving of a switch tube, and the voltage of the direct current module is converted into a second voltage from the preset voltage, wherein the second voltage meets the first voltage requirement of the charging load.
Through the direct current module that this embodiment provided, this direct current module carries out the online switching of wide voltage through the drive of adjustment switch pipe under controlling means's monitoring control, has solved the problem that traditional direct current module need shut down the reset and realize wide voltage switching, has realized the online switching of wide voltage of direct current module, has improved direct current module's charge efficiency.
In some embodiments, fig. 2 is a block diagram of a circuit structure of a dc module according to an embodiment of the present application, and as shown in fig. 2, in a case that the first switch module 17 and the second switch module 18 are full-bridge switch modules, the first switch module 17 includes a first switch tube 21, a second switch tube 22, a third switch tube 23 and a fourth switch tube 24, the second switch module 18 includes a fifth switch tube 25, a sixth switch tube 26, a seventh switch tube 27 and an eighth switch tube 28, and the transformer module 16 includes a first transformer 29 and a second transformer 30;
the phase shift angle of the switch circuit 12 is a first preset value, and the current working mode of the direct current module is a first working mode; in the case that the first voltage is greater than the upper limit value of the preset voltage, the switching circuit 12 changes the number of turns of the secondary coil of the transformer module 16 by adjusting the driving of the switching tube, including: the first switch tube 21 and the fifth switch tube 25 are driven the same, the second switch tube 22 and the sixth switch tube 26 are driven the same, the third switch tube 23 and the seventh switch tube 27 are driven the same, the fourth switch tube 24 and the eighth switch tube 28 are driven the same, the voltage of the dc module is converted into the second voltage from the preset voltage, and the dc module is converted into the second working mode from the first working mode;
the phase shift angle of the switch circuit 12 is a second preset value, and the current working mode of the direct current module is a second working mode; in the case that the first voltage is smaller than the lower limit value of the preset voltage, the switching circuit 12 changes the number of turns of the secondary coil of the transformer module 16 by adjusting the driving of the switching tube, including: the first switch tube 21 and the fifth switch tube 25 are driven complementarily, the second switch tube 22 and the sixth switch tube 26 are driven complementarily, the third switch tube 23 and the seventh switch tube 27 are driven complementarily, the fourth switch tube 24 and the eighth switch tube 28 are driven complementarily, the voltage of the direct current module is converted into a second voltage from a preset voltage, and the direct current module is switched into a first working mode from a second working mode.
Through the direct current module that this embodiment provided, this direct current module has carried out the online switching of wide voltage gear, has solved the problem that traditional direct current module need shut down the reset and realize wide voltage gear and switch, has realized the online switching of the wide voltage gear of direct current module, has improved direct current module's charge efficiency.
The embodiment provides a system for online gear shifting in a wide voltage range, which comprises a direct current module and a control device, wherein the direct current module comprises a direct current power supply 11, a switching circuit 12, a resonant circuit 13 and a rectifying circuit 14, wherein the resonant circuit 13 comprises a resonant module 15 and a transformer module 16, the switching circuit 12 comprises a first switching module 17 and a second switching module 18, and the first switching module 17 and the second switching module 18 both comprise a plurality of switching tubes;
the control device monitors a first voltage of the charging load in real time, and sends a control signal to the switch circuit 12 when the first voltage is larger than a preset voltage upper limit value of the direct current module or smaller than a preset voltage lower limit value, the switch circuit 12 changes the number of turns of a secondary coil of the transformer module 16 by adjusting the driving of a switch tube, and the voltage of the direct current module is converted into a second voltage from the preset voltage.
Wherein, the dc power supply 11 includes a power factor corrector, and the converting the voltage of the dc module from the preset voltage to the second voltage includes: the control device calculates the output voltage of the direct current power supply 11 according to the preset voltage and the coil turn ratio of the transformer module 16 under the condition that the voltage of the direct current module is the second voltage, and sends the output voltage to the power factor corrector through the communication serial port, and the power factor corrector adjusts the output voltage of the direct current power supply 11 and assists the voltage of the direct current module to be converted into the second voltage from the preset voltage.
Through the system provided by the embodiment, the direct current module is driven by the adjusting switch tube to perform on-line switching of the wide voltage under the monitoring control of the control device, so that the problem that the traditional direct current module system needs to be shut down and reset to realize the on-line switching of the wide voltage is solved, the on-line switching of the wide voltage of the direct current module is realized, and the charging efficiency of the direct current module is improved.
The embodiment provides an online gear-shifting method with a wide voltage range, which is applied to a direct current module, wherein the direct current module comprises a direct current power supply 11, a switching circuit 12, a resonant circuit 13 and a rectifying circuit 14, the resonant circuit 13 comprises a resonant module 15 and a transformer module 16, the switching circuit 12 comprises a first switching module 17 and a second switching module 18, and the first switching module 17 and the second switching module 18 both comprise a plurality of switching tubes; fig. 3 is a flowchart of wide voltage on-line switching of a dc module according to an embodiment of the present application, and as shown in fig. 3, the method includes the following steps:
s302, monitoring a first voltage of a charging load in real time by a control device;
s304, when the first voltage is larger than the upper limit value of the preset voltage of the direct current module or smaller than the lower limit value of the preset voltage;
s306, the control device sends a control signal to the switch circuit 12, and the switch circuit 12 changes the number of turns of the secondary coil of the transformer module 16 by adjusting the driving of the switch tube;
s308, converting the voltage of the direct current module from a preset voltage to a second voltage;
and S310, completing the on-line gear switching of the direct current module.
Through steps S302 to S310 in this embodiment, the dc module performs online switching of the wide voltage by adjusting the driving of the switching tube under the monitoring control of the control device, which solves the problem that the conventional dc module needs to be shut down and reset to implement the wide voltage switching, implements the online switching of the wide voltage of the dc module, and improves the charging efficiency of the dc module.
In some embodiments, in the case that the first switch module 17 and the second switch module 18 are full-bridge switch modules, the first switch module 17 includes a first switch tube 21, a second switch tube 22, a third switch tube 23 and a fourth switch tube 24, the second switch module 18 includes a fifth switch tube 25, a sixth switch tube 26, a seventh switch tube 27 and an eighth switch tube 28, and the method for the switch circuit 12 to change the number of turns of the secondary coil of the transformer module 16 by adjusting the driving of the switch tubes includes:
the phase shift angle of the switch circuit 12 is a first preset value, and the current working mode of the direct current module is a first working mode; in the case that the first voltage is greater than the upper limit value of the preset voltage, the control device sends a control signal to the switching circuit 12, and the switching circuit 12 changes the number of turns of the secondary coil of the transformer module 16 by adjusting the driving of the switching tube includes: the first switch tube 21 and the fifth switch tube 25 are driven the same, the second switch tube 22 and the sixth switch tube 26 are driven the same, the third switch tube 23 and the seventh switch tube 27 are driven the same, the fourth switch tube 24 and the eighth switch tube 28 are driven the same, the voltage of the direct current module is converted into the second voltage from the preset voltage, and the current working mode is converted into the second working mode from the first working mode;
the phase shift angle of the switch circuit 12 is a second preset value, and the current working mode of the direct current module is a second working mode; in the case where the first voltage is less than the lower limit value of the preset voltage, the control device sends a control signal to the switching circuit 12, and the switching circuit 12 changes the number of turns of the secondary coil of the transformer module 16 by adjusting the driving of the switching tube includes: the first switching tube 21 and the fifth switching tube 25 are driven complementarily, the second switching tube 22 and the sixth switching tube 26 are driven complementarily, the third switching tube 23 and the seventh switching tube 27 are driven complementarily, the fourth switching tube 24 and the eighth switching tube 28 are driven complementarily, the voltage of the direct current module is converted into a second voltage from a preset voltage, and the current working mode is switched into the first working mode from the second working mode.
By the method provided by the embodiment, the direct current module performs on-line switching of the wide voltage gear, the problem that the traditional direct current module needs to be shut down and reset to realize the switching of the wide voltage gear is solved, the on-line switching of the wide voltage gear of the direct current module is realized, and the charging efficiency of the direct current module is improved.
Preferably, the first preset value of the phase shift angle of the switching circuit 12 is 180 degrees, and the preset voltage range of the dc module is 200 v to 335 v; the second preset value of the phase shift angle of the switching circuit 12 is 0 degrees, and the preset voltage range of the dc module is 335 volts to 500 volts.
Preferably, the control means sending the control signal to the switching circuit 12 comprises: after the first voltage is greater than the upper limit of the preset voltage in the first working mode or the first voltage is less than the lower limit of the preset voltage in the second working mode and lasts for the preset time period, the control device sends the control signal to the switch circuit 12.
Preferably, the controlling means monitoring the first voltage of the charging load in real time includes: the control device acquires a first voltage of the charging load through a battery management system for monitoring the charging load in real time.
Preferably, the transformer module 16 includes a first transformer 29 and a second transformer 30, the number of turns of the primary coil of the first transformer 29 is 11, the number of turns of the secondary primary coil is 7, and the number of turns of the secondary coil is 1; the secondary transformer 30 has 11 turns of the primary coil, 7 turns of the secondary primary coil, and 1 turn of the secondary coil.
The embodiments of the present application will be described and explained with reference to the preferred embodiments, and fig. 4 is a block diagram of a circuit structure of a dc module according to the preferred embodiments, as shown in fig. 4, in case the first and second switching modules 17 and 18 of the dc module are full bridge switching modules, the first switch module 17 comprises a first switch tube 21, a second switch tube 22, a third switch tube 23 and a fourth switch tube 24, the second switch module 18 comprises a fifth switch tube 25, a sixth switch tube 26, a seventh switch tube 27 and an eighth switch tube 28, the transformer module 16 comprises a first transformer 29 and a second transformer 30, the number of turns of a primary coil of the first transformer 29 is 11 turns, the number of turns of a secondary primary coil is 7 turns and the number of turns of a secondary coil is 1 turn, the number of turns of the primary coil of the second transformer 30 is 11 turns, the number of turns of the secondary primary coil is 7 turns and the number of turns of the secondary coil is 1 turn;
the first preset value of the phase shift angle of the switching circuit 12 is 180 degrees, namely the first switching tube 21 and the fifth switching tube 25 are driven complementarily, namely the second switching tube 22 and the sixth switching tube 26 are driven complementarily, the third switching tube 23 and the seventh switching tube 27 are driven complementarily, and the fourth switching tube 24 and the eighth switching tube 28 are driven complementarily, so that the ratio of the AB terminal voltage of the rectifier diode in the rectifying circuit 14 to the primary side voltage of the transformer is 1:11, the ratio of the BC terminal voltage to the primary side voltage of the transformer is 8:11, the ratio of the AC terminal voltage to the primary side voltage of the transformer is 0:11, the overall ratio of the AC terminal voltage to the primary side voltage of the transformer is 8:11, and the preset voltage range of the DC module is 200V to 335V; the second preset value of the phase shift angle of the switching circuit 12 is 0 degree, that is, the first switching tube 21 and the fifth switching tube 25 are driven the same, the second switching tube 22 and the sixth switching tube 26 are driven the same, the third switching tube 23 and the seventh switching tube 27 are driven the same, the fourth switching tube 24 and the eighth switching tube 28 are driven the same, so that the transformation ratio of the AB end voltage of the rectifier diode in the rectifying circuit 14 to the primary side voltage of the transformer is 6:11, the transformation ratio of the BC end voltage to the primary side voltage of the transformer is 6:11, the transformation ratio of the AC end voltage to the primary side voltage of the transformer is 12:11, the overall transformation ratio is 12:11, and the preset voltage range of the DC module is 335 v to 500 v;
fig. 5 is a flow chart of the dc module wide voltage on-line switching according to the preferred embodiment of the present application, which includes the following steps, as shown in fig. 5:
s502, monitoring a first voltage of a charging load in real time by a control device through a battery management system of the charging load;
s504, when the first voltage is larger than the preset voltage upper limit value 335V when the phase shift angle of the direct current module is 180 degrees, and the first voltage lasts for more than the preset time (when the phase shift angle is 180 degrees, the transformation ratio of the AB terminal voltage of the rectifier diode to the primary side voltage of the transformer is 1:11, the transformation ratio of the BC terminal voltage to the primary side voltage of the transformer is 8:11, the transformation ratio of the AC terminal voltage to the primary side voltage of the transformer is 0:11, the whole transformation ratio is 8:11, and the preset voltage range of the direct current module is 200V to 335V);
s506, calculating the output voltage of the dc power supply 11 according to the output voltage when the phase shift angle of the dc module is 180 degrees and the winding turns ratio of the transformer module 16 when the phase shift angle of the dc module is 0 degrees, and sending the output voltage to a Power Factor Corrector (PFC) through a communication serial interface (SCI), wherein the PFC adjusts the output voltage of the dc power supply 11;
s508, the control device adjusts the phase shift angle of the direct current module to 0 degree and sends a control signal to the switch circuit 12, the driving of the switch tube is adjusted step by step, the first switch tube 21 is driven as the same as the fifth switch tube 25, the second switch tube 22 is driven as the same as the sixth switch tube 26, the third switch tube 23 is driven as the same as the seventh switch tube 27, and the fourth switch tube 24 is driven as the eighth switch tube 28, so that the number of turns of the secondary coil of the transformer module 16 is changed, the ratio of the AB end voltage of the rectifier diode to the primary side voltage of the transformer is 6:11, the ratio of the BC end voltage to the primary side voltage of the transformer is 6:11, the ratio of the AC end voltage to the primary side voltage of the transformer is 12:11, the overall ratio is 12:11, and the preset voltage range of the direct current module is changed from 335V to 500V;
s510, judging that the phase shift angle of the direct current module is adjusted to be 0 degree, updating the current working gear, and initializing the parameter of the current gear by the control device;
s512, the direct current module completes on-line gear switching.
Through steps S502 to S512 in this embodiment, the dc module performs online switching of the wide voltage by adjusting the driving of the switching tube under the monitoring control of the control device, which solves the problem that the conventional dc module needs to be shut down and reset to implement the wide voltage switching, implements the online switching of the wide voltage of the dc module, and improves the charging efficiency of the dc module.
It should be understood by those skilled in the art that various features of the above-described embodiments can be combined in any combination, and for the sake of brevity, all possible combinations of features in the above-described embodiments are not described in detail, but rather, all combinations of features which are not inconsistent with each other should be construed as being within the scope of the present disclosure.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The direct current module of the wide voltage range online gear shifting method is characterized by comprising a direct current power supply, a switching circuit, a resonant circuit and a rectifying circuit, wherein the resonant circuit comprises a resonant module and a transformer module, the switching circuit comprises a first switching module and a second switching module, and the first switching module and the second switching module respectively comprise a plurality of switching tubes;
the control device monitors a first voltage of a charging load in real time, and sends a control signal to the switch circuit when the first voltage is larger than a preset voltage upper limit value or smaller than a preset voltage lower limit value of the direct current module, the switch circuit changes the number of turns of a secondary coil of the transformer module by adjusting the driving of the switch tube, and the voltage of the direct current module is converted into a second voltage from the preset voltage.
2. The direct current module according to claim 1, wherein in the case that the first switch module and the second switch module are full-bridge switch modules, the first switch module comprises a first switch tube, a second switch tube, a third switch tube and a fourth switch tube, and the second switch module comprises a fifth switch tube, a sixth switch tube, a seventh switch tube and an eighth switch tube;
the phase shift angle of the switching circuit is a first preset value, and the current working mode of the direct current module is a first working mode; in the case that the first voltage is greater than an upper limit value of the preset voltage, the changing, by the switching circuit, the number of turns of the secondary coil of the transformer module by adjusting the driving of the switching tube includes: enabling the first switching tube to be driven the same as the fifth switching tube, the second switching tube to be driven the same as the sixth switching tube, the third switching tube to be driven the same as the seventh switching tube, the fourth switching tube to be driven the same as the eighth switching tube, converting the voltage of the direct current module from the preset voltage to the second voltage, and switching the direct current module from the first working mode to the second working mode;
the phase shift angle of the switch circuit is a second preset value, and the current working mode of the direct current module is a second working mode; in the case that the first voltage is less than a lower limit value of the preset voltage, the changing, by the switching circuit, the number of turns of the secondary coil of the transformer module by adjusting the driving of the switching tube includes: the first switching tube and the fifth switching tube are driven to complement each other, the second switching tube and the sixth switching tube are driven to complement each other, the third switching tube and the seventh switching tube are driven to complement each other, the fourth switching tube and the eighth switching tube are driven to complement each other, the voltage of the direct current module is converted into the second voltage from the preset voltage, and the direct current module is switched into the first working mode from the second working mode.
3. The system for online gear shifting in a wide voltage range is characterized by comprising a direct current module and a control device, wherein the direct current module comprises a direct current power supply, a switching circuit, a resonant circuit and a rectifying circuit, the resonant circuit comprises a resonant module and a transformer module, the switching circuit comprises a first switching module and a second switching module, and the first switching module and the second switching module respectively comprise a plurality of switching tubes;
the control device monitors a first voltage of a charging load in real time, and sends a control signal to the switch circuit when the first voltage is larger than a preset voltage upper limit value or smaller than a preset voltage lower limit value of the direct current module, the switch circuit changes the number of turns of a secondary coil of the transformer module by adjusting the driving of the switch tube, and the voltage of the direct current module is converted into a second voltage from the preset voltage.
4. The system of claim 3, wherein the DC power supply comprises a power factor corrector, and wherein converting the voltage of the DC module from the predetermined voltage to a second voltage comprises: and the control device calculates the output voltage of the direct current power supply according to the preset voltage and the coil turn ratio of the transformer module under the condition that the voltage of the direct current module is the second voltage, and sends the output voltage to the power factor corrector through a communication serial port, and the power factor corrector adjusts the output voltage of the direct current power supply to assist the voltage of the direct current module to be converted into the second voltage from the preset voltage.
5. The method is characterized in that the method is applied to a direct current module, the direct current module comprises a direct current power supply, a switching circuit, a resonant circuit and a rectifying circuit, wherein the resonant circuit comprises a resonant module and a transformer module, the switching circuit comprises a first switching module and a second switching module, and a plurality of switching tubes are arranged in the first switching module and the second switching module; the method comprises the following steps:
the control device monitors a first voltage of a charging load in real time, and sends a control signal to the switch circuit when the first voltage is larger than a preset voltage upper limit value or smaller than a preset voltage lower limit value of the direct current module, the switch circuit changes the number of turns of a secondary coil of the transformer module by adjusting the driving of the switch tube, and the voltage of the direct current module is converted into a second voltage from the preset voltage.
6. The method of claim 5, wherein the first switch module comprises a first switch tube, a second switch tube, a third switch tube and a fourth switch tube, and the second switch module comprises a fifth switch tube, a sixth switch tube, a seventh switch tube and an eighth switch tube, when the first switch module and the second switch module are full-bridge switch modules, the method for changing the number of turns of the secondary coil of the transformer module by adjusting the driving of the switch tubes comprises:
the phase shift angle of the switching circuit is a first preset value, and the current working mode of the direct current module is a first working mode; when the first voltage is greater than the upper limit value of the preset voltage, the control device sends a control signal to the switching circuit, and the switching circuit changes the number of turns of the secondary coil of the transformer module by adjusting the driving of the switching tube, wherein the control signal comprises: enabling the first switching tube to be driven the same as the fifth switching tube, the second switching tube to be driven the same as the sixth switching tube, the third switching tube to be driven the same as the seventh switching tube, the fourth switching tube to be driven the same as the eighth switching tube, converting the voltage of the direct current module from the preset voltage to the second voltage, and switching the current working mode from the first working mode to the second working mode;
the phase shift angle of the switching circuit is a second preset value, and the current working mode of the direct current module is a second working mode; in a case where the first voltage is less than a lower limit value of the preset voltage, the control device sends a control signal to the switching circuit, and the switching circuit changes the number of turns of the secondary coil of the transformer module by adjusting the driving of the switching tube includes: the first switching tube and the fifth switching tube are driven to complement each other, the second switching tube and the sixth switching tube are driven to complement each other, the third switching tube and the seventh switching tube are driven to complement each other, the fourth switching tube and the eighth switching tube are driven to complement each other, the voltage of the direct current module is converted into the second voltage from the preset voltage, and the current working mode is switched into the first working mode from the second working mode.
7. The method of claim 6, wherein the first preset value of the phase shift angle of the switching circuit is 180 degrees, and the preset voltage range of the DC module is 200 volts to 335 volts; a second preset value of the phase shift angle of the switching circuit is 0 degree, and the preset voltage range of the direct current module is 335 volts to 500 volts.
8. The method of claim 6, wherein the control device sending a control signal to the switching circuit comprises: and after the first voltage is greater than the upper limit value of the preset voltage in the first working mode or the first voltage is less than the lower limit value of the preset voltage in the second working mode and lasts for a preset time period, the control device sends a control signal to the switch circuit.
9. The method of claim 5, wherein the controlling device monitoring the first voltage of the charging load in real time comprises: the control device acquires the first voltage of the charging load through a battery management system for monitoring the charging load in real time.
10. The method of claim 5, wherein the DC power supply comprises a power factor corrector, and wherein converting the voltage of the DC module from the predetermined voltage to a second voltage comprises: and the control device calculates the output voltage of the direct current power supply according to the preset voltage and the coil turn ratio of the transformer module under the condition that the voltage of the direct current module is the second voltage, and sends the output voltage to the power factor corrector through a communication serial port, and the power factor corrector adjusts the output voltage of the direct current power supply to assist the voltage of the direct current module to be converted into the second voltage from the preset voltage.
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| CN202011484043.3A CN112713779A (en) | 2020-12-15 | 2020-12-15 | Wide-voltage-range online gear switching method and system and direct-current module |
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| CN202011484043.3A CN112713779A (en) | 2020-12-15 | 2020-12-15 | Wide-voltage-range online gear switching method and system and direct-current module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113964923A (en) * | 2021-09-15 | 2022-01-21 | 许继电源有限公司 | High-power charger device based on gear-switching control and gear-switching control method thereof |
| WO2023015827A1 (en) * | 2021-08-13 | 2023-02-16 | 深圳市永联科技股份有限公司 | Charging method and charging apparatus |
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| CN109818504A (en) * | 2018-12-30 | 2019-05-28 | 杭州中恒电气股份有限公司 | A kind of controlled resonant converter of the series-parallel bumpless transfer of wide scope |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207184330U (en) * | 2017-08-14 | 2018-04-03 | 深圳市保益新能电气有限公司 | A kind of wide scope Sofe Switch DC transfer circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023015827A1 (en) * | 2021-08-13 | 2023-02-16 | 深圳市永联科技股份有限公司 | Charging method and charging apparatus |
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