CN113691105B - Balance bridge voltage equalizing control method and power supply - Google Patents
Balance bridge voltage equalizing control method and power supply Download PDFInfo
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- CN113691105B CN113691105B CN202110859723.7A CN202110859723A CN113691105B CN 113691105 B CN113691105 B CN 113691105B CN 202110859723 A CN202110859723 A CN 202110859723A CN 113691105 B CN113691105 B CN 113691105B
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Classifications
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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
- H02M1/00—Details of apparatus for conversion
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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
- 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
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Abstract
The invention is applicable to the technical field of power supplies, and provides a balance bridge voltage equalizing control method and a power supply, wherein the method comprises the following steps: acquiring the pressure difference between the positive bus and the negative bus corresponding to the balance bridge; determining a duty ratio adjustment amount according to the pressure difference between the positive bus and the negative bus; if the duty ratio adjustment quantity is larger than a preset threshold value, controlling the upper bridge arm switching tube of the balance bridge to act according to the duty ratio adjustment quantity; if the duty ratio adjustment quantity is not greater than the preset threshold value, controlling the action of a lower bridge arm switch tube of the balance bridge according to the duty ratio adjustment quantity; the upper bridge arm switching tube and the lower bridge arm switching tube are conducted in a non-complementary mode. According to the invention, the upper bridge arm or the lower bridge arm of the balance bridge is controlled according to the pressure difference between the positive bus and the negative bus by referring to the actual demand, and the upper bridge arm and the lower bridge arm do not need to be controlled complementarily, so that the current flowing through the inductance of the balance bridge is reduced, and the loss of the inductance of the balance bridge is reduced.
Description
Technical Field
The invention belongs to the technical field of power supplies, and particularly relates to a balance bridge voltage equalizing control method and a power supply.
Background
In order to prevent the busbar voltage of the power supply from deviating, a balance bridge is generally arranged between the positive busbar and the negative busbar to perform voltage equalizing on the positive busbar and the negative busbar, and refer to fig. 1.
In the prior art, the duty ratio of the switching tubes of the upper bridge arm and the lower bridge arm of the balance bridge is generally set to be about 50%, and the upper bridge arm and the lower bridge arm are complementarily output. For example, when the positive bus voltage is higher, the turn-on time of the upper bridge arm switching tube is increased, and the turn-on time of the lower bridge arm switching tube is reduced. Otherwise, the opening time of the upper bridge arm switching tube is reduced, and the opening time of the lower bridge arm switching tube is increased.
The duty ratio of the switching tubes of the upper bridge arm and the lower bridge arm is set to be about 50%, so that the current flowing through the balance bridge inductor is larger, and the balance bridge inductor loss is large.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a balanced bridge voltage equalizing control method and a power supply, which are used for solving the problem that the inductance loss of a balanced bridge is large because the duty ratio of the switching tubes of the upper bridge arm and the lower bridge arm of the balanced bridge in the prior art is about 50%.
A first aspect of an embodiment of the present invention provides a balanced bridge voltage equalizing control method, including:
Acquiring the pressure difference between the positive bus and the negative bus corresponding to the balance bridge;
determining a duty ratio adjustment amount according to the pressure difference between the positive bus and the negative bus;
If the duty ratio adjustment quantity is larger than a preset threshold value, controlling the switching tube of the upper bridge arm of the balance bridge to act according to the duty ratio adjustment quantity;
If the duty ratio adjustment amount is not greater than the preset threshold value, controlling the action of the lower bridge arm switch tube of the balance bridge according to the duty ratio adjustment amount
The upper bridge arm switching tube and the lower bridge arm switching tube are conducted in a non-complementary mode.
A second aspect of the embodiments of the present invention provides a power supply control apparatus, including a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the balanced bridge voltage equalizing control method as provided in the first aspect of the embodiments of the present invention when the computer program is executed by the processor.
A third aspect of the embodiments of the present invention provides a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the balanced bridge voltage equalizing control method as provided in the first aspect of the embodiments of the present invention.
A fourth aspect of an embodiment of the present invention provides a power supply, comprising: positive bus, negative bus, positive bus capacitor, negative bus capacitor, balance bridge inductance and power control device according to the second aspect of the embodiment of the invention;
The first end of the positive bus capacitor is connected with the positive bus, and the second end of the positive bus capacitor is connected with the first end of the negative bus capacitor; the second end of the negative bus capacitor is connected with the negative bus;
the balance bridge is connected with the positive bus at the first end, the negative bus at the second end and the midpoint through the balance bridge inductor;
the power control device is connected with the balance bridge.
The embodiment of the invention provides a balance bridge voltage equalizing control method and a power supply, wherein the method comprises the following steps: acquiring the pressure difference between the positive bus and the negative bus corresponding to the balance bridge; determining a duty ratio adjustment amount according to the pressure difference between the positive bus and the negative bus; if the duty ratio adjustment quantity is larger than a preset threshold value, controlling the switching tube of the upper bridge arm of the balance bridge to act according to the duty ratio adjustment quantity; and if the duty ratio adjustment quantity is not greater than the preset threshold value, controlling the lower bridge arm switching tube of the balance bridge to act according to the duty ratio adjustment quantity. According to the embodiment of the invention, the upper bridge arm or the lower bridge arm of the balance bridge is controlled according to the pressure difference between the positive bus and the negative bus and further according to the pressure difference between the positive bus and the negative bus in combination with actual requirements, and the upper bridge arm and the lower bridge arm do not need to be controlled in a complementary manner, so that the current flowing through the balance bridge inductor is reduced, and the loss of the balance bridge inductor is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a topology of a balanced bridge;
FIG. 2 is a graph of modulated waveforms corresponding to a prior art balanced bridge equalization control method;
fig. 3 is a schematic implementation flow chart of a balancing bridge equalizing control method according to an embodiment of the present invention;
fig. 4 is a modulation waveform diagram corresponding to a balanced bridge equalizing control method according to an embodiment of the present invention;
FIG. 5 is a modulated waveform diagram corresponding to another method for controlling a balance bridge according to an embodiment of the present invention;
Fig. 6 is a schematic diagram of a balancing bridge equalizing control device according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a power control apparatus provided by an embodiment of the present invention;
fig. 8 is a schematic diagram of a power supply according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to illustrate the technical scheme of the invention, the following description is made by specific examples.
Referring to fig. 1, fig. 1 shows a topology of a balanced bridge 1.
When the upper bridge arm switch tube Q1 of the balance bridge 1 is conducted, the positive BUS BUS+ charges the negative BUS capacitor C2 through the balance bridge inductor L1, the absolute value of the negative BUS voltage is increased, and the absolute value of the positive BUS voltage is reduced. When the lower bridge arm switching tube Q2 is conducted, the negative bus capacitor C2 discharges through the lower bridge arm switching tube Q2, the absolute value of the positive bus voltage is increased, and the absolute value of the negative bus voltage is reduced.
In the prior art, the duty ratio of the upper and lower bridge arm switching tubes (Q1 and Q2) of the balance bridge 1 is generally set to about 50%, the upper and lower bridge arms complement each other to output, and the bus voltage is subjected to voltage equalizing control. For example, referring to fig. 2, when the absolute value of the positive BUS voltage is high, the on time of the upper arm switching tube Q1 is increased, the on time of the lower arm switching tube Q2 is reduced, the electric energy of the positive BUS bus+ is transferred to the negative BUS-, and the absolute value of the positive BUS voltage is reduced. Conversely, when the absolute value of the negative bus voltage is higher, the turn-on time of the upper bridge arm switching tube Q1 is reduced, and the turn-on time of the lower bridge arm switching tube Q2 is increased.
The duty ratio of the switching tubes (Q1 and Q2) of the upper bridge arm and the lower bridge arm is about 50%, so that the duty ratio is larger, the regulating quantity is large, the current flowing through the balance bridge inductor L1 is larger, and the balance bridge inductor L1 is large in loss. Meanwhile, the ripple wave of the current flowing through the balance bridge inductance L1 is large, so that the fluctuation of the neutral point voltage of the bus is also large and unstable.
Based on the above problems, referring to fig. 3, an embodiment of the present invention provides a balanced bridge voltage equalizing control method, including:
s101: acquiring the pressure difference between the positive bus and the negative bus corresponding to the balance bridge;
s102: determining a duty ratio adjustment amount according to the pressure difference between the positive bus and the negative bus;
S103: if the duty ratio adjustment quantity is larger than a preset threshold value, controlling the switching tube of the upper bridge arm of the balance bridge to act according to the duty ratio adjustment quantity;
s104: if the duty ratio adjustment quantity is not greater than the preset threshold value, controlling the lower bridge arm switching tube of the balance bridge to act according to the duty ratio adjustment quantity; the upper bridge arm switching tube and the lower bridge arm switching tube are conducted in a non-complementary mode.
According to the embodiment of the invention, the differential pressure of the positive bus and the negative bus is determined, the duty ratio adjustment quantity is determined according to the differential pressure of the positive bus and the negative bus, only the upper bridge arm is adjusted according to the duty ratio adjustment quantity, or only the lower bridge arm is adjusted, the upper bridge arm switching tube Q1 and the lower bridge arm switching tube Q2 do not need to be conducted in a complementary mode, the opening time of the switching tube can be effectively reduced, the current flowing through the balance bridge inductor is reduced, the loss of the balance bridge inductor is reduced, and the cost of the inductor is reduced. Meanwhile, the duty ratio of the upper tube and the lower tube of the balance bridge is smaller, the current ripple of the inductance of the balance bridge is smaller, the neutral point potential of the bus is more stable, and the stability of the power supply is improved.
In some embodiments, S102 may include:
s1021: acquiring an inductance current value of a balance bridge inductance corresponding to a flowing balance bridge;
s1022: and determining the duty ratio adjustment quantity according to the inductance current value and the pressure difference between the positive bus and the negative bus.
According to the principle of the balance bridge, the duty ratio adjustment quantity is determined by combining the inductance current value and the pressure difference between the positive bus and the negative bus, the result of the duty ratio adjustment quantity is more accurate, and the control of the balance bridge is more accurate.
In some embodiments, S1022 may include:
1. Inputting the pressure difference between the positive bus and the negative bus into a first controller to obtain a reference current value;
2. and subtracting the inductance current value from the reference current value to obtain a current error value, and inputting the current error value into the second controller to obtain the duty ratio adjustment quantity.
In the embodiment of the invention, the inverter is regulated by adopting double loop control, and the current flowing through the balance bridge inductor is regulated according to the actual energy requirement, so that the control is more accurate.
In some embodiments, the preset threshold may be 0.
In the embodiment of the invention, when the duty ratio adjustment amount is positive, the switching tube Q1 of the upper bridge arm is controlled to be conducted; when the duty ratio adjustment amount is negative, the lower bridge arm switching tube Q2 is controlled to be conducted; according to the actual requirements, only the upper bridge arm switching tube Q1 is controlled to be conducted, or the lower bridge arm switching tube Q2 is controlled to be conducted, the duty ratio of the switching tube is not required to be opened to about 50%, and the corresponding switching tube is only required to be controlled to be conducted according to the pressure difference between the positive bus and the negative bus. For example, referring to fig. 4, when the absolute value of the positive bus voltage is large, the upper arm switching tube Q1 is controlled to be turned on only with a duty ratio of 15%, the electric energy of the positive bus is transferred to the negative bus, and the absolute value of the positive bus voltage is reduced to reach equilibrium. When the absolute value of the negative bus voltage is large, the lower bridge arm switch tube Q2 is controlled to be conducted only with the duty ratio of 15%, and the absolute value of the negative bus voltage is reduced to reach balance.
According to the embodiment of the invention, the duty ratio of the upper bridge arm switch tube (Q1) and the lower bridge arm switch tube (Q2) of the balance bridge is set to be about 0%, complementary conduction is not needed, the current flowing through the balance bridge inductor is greatly reduced, and the loss of the balance bridge inductor is reduced. Meanwhile, the duty ratio of the switching tube is small, the energy exchange between the positive bus and the negative bus is more gentle, so that the adjustment is more accurate, the current ripple wave flowing through the balance bridge inductor is smaller, the potential at the midpoint of the bus is more stable, and the stability of the whole power supply is improved.
In some embodiments, S103 may include:
S1031: performing pulse width modulation by taking the duty cycle adjustment amount as a first target duty cycle to generate a first driving signal; the first driving signal is used for indicating an upper bridge arm switching tube of the balance bridge to act according to a first target duty ratio;
s104 may include:
S1041: performing pulse width modulation by taking the absolute value of the duty ratio adjustment amount as a second target duty ratio to generate a second driving signal; the second driving signal is used for indicating the lower bridge arm switching tube of the balance bridge to act according to a second target duty ratio.
Further, in order to improve control accuracy, the duty ratio adjustment amount may be multiplied by a carrier period (may be a power frequency period or a high frequency period) to obtain a first conduction time, and the upper bridge arm switching tube is controlled to switch multiple times in a period according to the first switching conduction time, so that the total conduction time of the upper bridge arm switching tube in one carrier period is equal to the first conduction time. The lower bridge arm switch tube is controlled by adopting the same method. Referring to fig. 5, in the embodiment of the invention, the switching tube is controlled to be conducted for multiple times in one carrier period, so that the energy of the positive bus and the energy of the negative bus are exchanged more stably, the current ripple wave of the balance bridge inductance is further reduced, and the adjustment of the neutral point potential of the bus is more stable. The switching times of the switching tube in one carrier period can be set according to practical application requirements.
In some embodiments, the first controller and the second controller may each be a proportional-integral controller.
In some embodiments, before S101, the method may further include:
S105: obtaining the grounding voltage of a positive bus corresponding to the balance bridge and the grounding voltage of a negative bus;
S106: and subtracting the absolute value of the ground voltage of the negative bus from the ground voltage of the positive bus to obtain the pressure difference between the positive bus and the negative bus.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
Corresponding to the above embodiment, referring to fig. 6, an embodiment of the present invention further provides a balanced bridge equalizing control apparatus, including:
The differential pressure acquisition module 21 is used for acquiring the differential pressure between the positive bus and the negative bus corresponding to the balance bridge;
An adjustment amount determination module 22 for determining a duty cycle adjustment amount according to a pressure difference between the positive and negative bus bars;
the first control module 23 is configured to control the switching tube of the upper bridge arm of the balance bridge to act according to the duty cycle adjustment amount if the duty cycle adjustment amount is greater than a preset threshold;
The second control module 24 is configured to control the lower bridge arm switching tube of the balance bridge to act according to the duty cycle adjustment amount if the duty cycle adjustment amount is not greater than the preset threshold; the upper bridge arm switching tube and the lower bridge arm switching tube are conducted in a non-complementary mode.
In some embodiments, the adjustment amount determination module 22 may include:
An inductor current obtaining unit 221, configured to obtain an inductor current value of the balance bridge inductor corresponding to the balance bridge;
the adjustment amount determining unit 222 is configured to determine a duty cycle adjustment amount according to the inductance current value and the voltage difference between the positive and negative bus bars.
In some embodiments, the adjustment amount determination unit 222 is specifically configured to:
1. Inputting the pressure difference between the positive bus and the negative bus into a first controller to obtain a reference current value;
2. and subtracting the inductance current value from the reference current value to obtain a current error value, and inputting the current error value into the second controller to obtain the duty ratio adjustment quantity.
In some embodiments, the preset threshold is 0.
In some embodiments, the first control module 23 is specifically configured to:
Performing pulse width modulation by taking the duty cycle adjustment amount as a first target duty cycle to generate a first driving signal; the first driving signal is used for indicating an upper bridge arm switching tube of the balance bridge to act according to a first target duty ratio;
The second control module 24 is specifically configured to:
Performing pulse width modulation by taking the absolute value of the duty ratio adjustment amount as a second target duty ratio to generate a second driving signal; the second driving signal is used for indicating the lower bridge arm switching tube of the balance bridge to act according to a second target duty ratio.
In some embodiments, the first controller and the second controller are each proportional-integral controllers.
In some embodiments, the apparatus may further include:
the positive and negative bus voltage acquisition module 25 is used for acquiring the ground voltage of the positive bus and the ground voltage of the negative bus corresponding to the balance bridge;
the differential pressure determining module 26 is configured to subtract the absolute value of the voltage to ground of the negative bus from the voltage to ground of the positive bus to obtain a differential pressure between the positive bus and the negative bus.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional units and modules, that is, the internal structure of the power control apparatus is divided into different functional units or modules, so as to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above device may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
Fig. 7 is a schematic block diagram of a power control apparatus provided in an embodiment of the present invention. As shown in fig. 7, the power supply control apparatus 4 of this embodiment includes: one or more processors 40, a memory 41, and a computer program 42 stored in the memory 41 and executable on the processor 40. The steps of the various embodiments of the balanced bridge balancing control method described above, such as steps S101 to S104 shown in fig. 3, are implemented when the processor 40 executes the computer program 42. Or the processor 40, when executing the computer program 42, performs the functions of the modules/units of the embodiment of the balancing bridge pressure equalizing control apparatus described above, such as the functions of the modules 21 to 24 shown in fig. 6.
Illustratively, the computer program 42 may be partitioned into one or more modules/units, which are stored in the memory 41 and executed by the processor 40 to complete the present application. One or more of the modules/units may be a series of computer program instruction segments capable of performing a specific function, which instruction segments are used to describe the execution of the computer program 42 in the power control device 4. For example, the computer program 42 may be divided into the differential pressure acquisition module 21, the adjustment amount determination module 22, the first control module 23, and the second control module 24.
The differential pressure acquisition module 21 is used for acquiring the differential pressure between the positive bus and the negative bus corresponding to the balance bridge;
An adjustment amount determination module 22 for determining a duty cycle adjustment amount according to a pressure difference between the positive and negative bus bars;
the first control module 23 is configured to control the switching tube of the upper bridge arm of the balance bridge to act according to the duty cycle adjustment amount if the duty cycle adjustment amount is greater than a preset threshold;
The second control module 24 is configured to control the lower bridge arm switching tube of the balance bridge to act according to the duty cycle adjustment amount if the duty cycle adjustment amount is not greater than the preset threshold; the upper bridge arm switching tube and the lower bridge arm switching tube are conducted in a non-complementary mode.
Other modules or units are not described in detail herein.
The power control device 4 includes, but is not limited to, a processor 40, a memory 41. It will be appreciated by those skilled in the art that fig. 7 is only one example of a power control device and does not constitute a limitation of the power control device 4, and may include more or less components than illustrated, or may combine certain components, or different components, e.g., the power control device 4 may also include an input device, an output device, a network access device, a bus, etc.
The Processor 40 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 41 may be an internal storage unit of the power control device, such as a hard disk or a memory of the power control device. The memory 41 may also be an external storage device of the power supply control device, such as a plug-in hard disk provided on the power supply control device, a smart memory card (SMART MEDIA CARD, SMC), a Secure Digital (SD) card, a flash memory card (FLASH CARD), or the like. Further, the memory 41 may also include both an internal storage unit of the power supply control device and an external storage device. The memory 41 is used to store a computer program 42 and other programs and data required by the power supply control device. The memory 41 may also be used to temporarily store data that has been output or is to be output.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed power control apparatus and method may be implemented in other manners. For example, the above-described embodiments of the power control device are merely illustrative, e.g., the division of modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present application may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, and the computer program may be stored in a computer readable storage medium, where the computer program, when executed by a processor, may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, executable files or in some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the content of the computer readable medium can be appropriately increased or decreased according to the requirements of the jurisdiction's jurisdiction and the patent practice, for example, in some jurisdictions, the computer readable medium does not include electrical carrier signals and telecommunication signals according to the jurisdiction and the patent practice.
Corresponding to the above embodiments, referring to fig. 8, an embodiment of the present invention further provides a power supply, including: positive bus+, negative BUS-, positive BUS capacitor C1, negative BUS capacitor C2, balance bridge 1, balance bridge inductance L1, and power control device 4 provided as in the above embodiment;
The first end of the positive BUS capacitor C1 is connected with the positive BUS BUS+, and the second end of the positive BUS capacitor C1 is connected with the first end of the negative BUS capacitor C2; the second end of the negative BUS capacitor C2 is connected with the negative BUS BUS;
The balance bridge 1 is connected with the positive BUS BUS+ at a first end, connected with the negative BUS BUS-at a second end, and connected with a connecting point of the positive BUS capacitor C1 and the negative BUS capacitor C2 at a midpoint through a balance bridge inductor L1;
the power control device 4 is connected to the balance bridge 1.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (8)
1. A balanced bridge equalization control method, comprising:
Acquiring the pressure difference between the positive bus and the negative bus corresponding to the balance bridge;
Determining a duty ratio adjustment amount according to the pressure difference between the positive bus and the negative bus;
If the duty ratio adjustment quantity is larger than a preset threshold value, controlling the upper bridge arm switching tube of the balance bridge to act according to the duty ratio adjustment quantity;
if the duty ratio adjustment quantity is not greater than the preset threshold value, controlling the action of a lower bridge arm switch tube of the balance bridge according to the duty ratio adjustment quantity;
the upper bridge arm switching tube and the lower bridge arm switching tube are conducted in a non-complementary mode;
the step of controlling the action of the upper bridge arm switch tube of the balance bridge according to the duty ratio adjustment quantity comprises the following steps:
Multiplying the duty cycle adjustment amount by a carrier period to obtain a first conduction time; generating a first driving signal according to the first on time; the first driving signal is used for indicating the upper bridge arm switching tube of the balance bridge to switch for a plurality of times in each carrier period; the total conduction time of the upper bridge arm switch tube of the balance bridge in any carrier period is the first conduction time;
the step of controlling the action of the lower bridge arm switch tube of the balance bridge according to the duty ratio adjustment quantity comprises the following steps:
Multiplying the absolute value of the duty cycle adjustment amount by the carrier period to obtain a second conduction time; generating a second driving signal according to the second on time; the second driving signal is used for indicating the lower bridge arm switching tube of the balance bridge to switch for a plurality of times in each carrier period; the total conduction time of the lower bridge arm switch tube of the balance bridge in any carrier period is the second conduction time;
the method for determining the duty ratio adjustment amount according to the pressure difference between the positive bus and the negative bus comprises the following steps:
Acquiring an inductance current value of a balance bridge inductance corresponding to the balance bridge;
and determining the duty ratio adjustment amount according to the inductance current value and the pressure difference between the positive bus and the negative bus.
2. The balance bridge equalizing control method according to claim 1, wherein said determining said duty ratio adjustment amount according to said inductance current value and a pressure difference between said positive and negative bus bars comprises:
Inputting the pressure difference between the positive bus and the negative bus into a first controller to obtain a reference current value;
And subtracting the inductance current value from the reference current value to obtain a current error value, and inputting the current error value into a second controller to obtain the duty cycle adjustment quantity.
3. The balance bridge equalization control method of claim 2, wherein said preset threshold is 0.
4. The balanced bridge voltage equalizing control method of claim 2, wherein the first controller and the second controller are each proportional-integral controllers.
5. The balance bridge equalization control method of any of claims 1-4, wherein prior to said deriving a differential pressure between the corresponding positive and negative bus bars of the balance bridge, said method further comprises:
Obtaining the grounding voltage of a positive bus and the grounding voltage of a negative bus corresponding to the balance bridge;
and subtracting the absolute value of the ground voltage of the negative bus from the ground voltage of the positive bus to obtain the pressure difference between the positive bus and the negative bus.
6. A power control device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the balanced bridge voltage equalizing control method according to any one of claims 1 to 5 when executing the computer program.
7. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the balance bridge equalizing control method according to any one of claims 1 to 5.
8. A power supply, comprising: a positive bus, a negative bus, a positive bus capacitor, a negative bus capacitor, a balance bridge inductance, and the power control apparatus according to claim 6;
The first end of the positive bus capacitor is connected with the positive bus, and the second end of the positive bus capacitor is connected with the first end of the negative bus capacitor; the second end of the negative bus capacitor is connected with the negative bus;
the first end of the balance bridge is connected with the positive bus, the second end of the balance bridge is connected with the negative bus, and the midpoint of the balance bridge is connected with the connection point of the positive bus capacitor and the negative bus capacitor through the balance bridge inductor;
the power control device is connected with the balance bridge.
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| CN114629224A (en) * | 2022-03-24 | 2022-06-14 | 漳州科华电气技术有限公司 | Neutral point balance control method for direct current bus voltage of UPS system and inverter |
| CN115622435B (en) * | 2022-12-13 | 2023-04-28 | 麦田能源有限公司 | Inverter control method and device based on scene observation and inverter system |
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| CN116760042B (en) * | 2023-08-15 | 2023-11-03 | 锦浪科技股份有限公司 | Bus voltage balance control system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904892A (en) * | 2014-04-18 | 2014-07-02 | 南京航空航天大学 | Self-voltage-sharing two-tube high-gain converter and control method thereof |
| CN112187077A (en) * | 2020-09-25 | 2021-01-05 | 西安班特利奥能源科技有限公司 | Voltage balancing method and system for three-level inverter circuit direct current side series capacitor |
| CN113162589A (en) * | 2021-02-23 | 2021-07-23 | 潍坊歌尔微电子有限公司 | Timing adjustment method, terminal device and storage medium |
-
2021
- 2021-07-28 CN CN202110859723.7A patent/CN113691105B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904892A (en) * | 2014-04-18 | 2014-07-02 | 南京航空航天大学 | Self-voltage-sharing two-tube high-gain converter and control method thereof |
| CN112187077A (en) * | 2020-09-25 | 2021-01-05 | 西安班特利奥能源科技有限公司 | Voltage balancing method and system for three-level inverter circuit direct current side series capacitor |
| CN113162589A (en) * | 2021-02-23 | 2021-07-23 | 潍坊歌尔微电子有限公司 | Timing adjustment method, terminal device and storage medium |
Non-Patent Citations (1)
| Title |
|---|
| 李会南."基于T型三电平双模式逆变器的控制技术研究".《中国优秀硕士学位论文全文数据库（工程科技II辑）》.2015,(第2015年第10期期),20-21页. * |
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