CN115313870A - Soft start pre-charging control method, device, equipment and storage medium - Google Patents
Soft start pre-charging control method, device, equipment and storage medium Download PDFInfo
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- CN115313870A CN115313870A CN202210970126.6A CN202210970126A CN115313870A CN 115313870 A CN115313870 A CN 115313870A CN 202210970126 A CN202210970126 A CN 202210970126A CN 115313870 A CN115313870 A CN 115313870A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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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
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a soft start pre-charging control method, a soft start pre-charging control device, soft start pre-charging equipment and a storage medium. The method comprises the following steps: acquiring the voltage of a suspension capacitor of a target suspension capacitor in a target circuit; when the voltage of the suspension capacitor is smaller than a pre-charging threshold value, determining the maximum duty ratio of a target electrifying driving signal in the current pre-charging period according to the electrical parameters of the target circuit; determining a target duty ratio by combining the maximum duty ratio based on a duty ratio selection rule; and triggering the target electrifying driving signal according to the target duty ratio in the current pre-charging period so as to realize the soft start pre-charging of the target suspension capacitor. The invention solves the problems that the floating capacitor can not be charged in the parallel connection scene of the conventional FC-Boost circuit, the power circuit is over-voltage and over-current damaged and the like, and effectively controls the pre-charging of the floating capacitor in the FC-Boost circuit on the premise of not increasing the cost of a hardware circuit.
Description
Technical Field
The invention relates to the technical field of electrical design, in particular to a soft start pre-charging control method, a soft start pre-charging control device, soft start pre-charging equipment and a storage medium.
Background
With the development of the photovoltaic converter technology, the application of the FC-Boost three-level circuit is mature and popular day by day. Fig. 1a shows a circuit schematic of a prior art FC-Boost circuit.
In the field of photovoltaic, the parallel application of a plurality of Boost circuits is very common. However, in parallel application, if the output end of the circuit is powered first and the output voltage is too low, the floating capacitor in the circuit may not be charged, and if the photovoltaic module is directly started without being controlled, problems such as overvoltage and overcurrent damage of the power circuit may be caused. Fig. 1b shows a schematic diagram of a principle of FC-Boost circuit reverse charging, as shown in fig. 1b, under the condition of 1500V output voltage, the potential of the clamping point is 750V, if the input voltage is greater than 750V, no current flows through the floating capacitor Cf reverse charging loop, that is, the floating capacitor pre-charging cannot be realized, and in an extreme case, the voltage of the floating capacitor is 0, which easily causes circuit damage.
Disclosure of Invention
The invention provides a soft-start pre-charging control method, a soft-start pre-charging control device, soft-start pre-charging equipment and a storage medium, which are used for effectively controlling the pre-charging of a floating capacitor in an FC-Boost circuit.
According to an aspect of the present invention, there is provided a soft-start precharge control method, the method including:
acquiring the voltage of a suspension capacitor of a target suspension capacitor in a target circuit;
when the voltage of the suspension capacitor is smaller than a pre-charging threshold value, determining the maximum duty ratio of a target electrifying driving signal in the current pre-charging period according to the electrical parameters of the target circuit;
determining a target duty ratio by combining the maximum duty ratio based on a duty ratio selection rule;
and triggering the target electrifying driving signal according to the target duty ratio in the current pre-charging period so as to realize the soft start pre-charging of the target suspension capacitor.
Optionally, the determining the maximum duty ratio of the target power-on driving signal in the current precharge period according to the electrical parameter of the target circuit includes:
collecting the electrical parameters of the target circuit at the current moment;
determining an achievable duty cycle of a target power-on drive signal in the target circuit according to the electrical parameter;
and taking the achievable duty ratio as the maximum duty ratio of the target electrifying driving signal in the current pre-charging period.
Optionally, the determining a target duty ratio based on the duty ratio selection rule in combination with the maximum duty ratio includes:
and acquiring a duty ratio selection ratio, and taking the product of the maximum duty ratio and the duty ratio selection ratio as a target duty ratio.
Optionally, after obtaining the floating capacitor voltage of the target floating capacitor in the target circuit, the method further includes:
and when the voltage of the floating capacitor is greater than or equal to the pre-charging threshold value, stopping the soft-start pre-charging operation of the target floating capacitor.
According to another aspect of the present invention, there is provided a soft start precharge control device, including:
the suspended capacitor voltage acquisition module is used for acquiring the suspended capacitor voltage of a target suspended capacitor in a target circuit;
the maximum duty ratio determining module is used for determining the maximum duty ratio of a target electrifying driving signal in the current pre-charging period according to the electrical parameters of the target circuit when the voltage of the suspension capacitor is smaller than a pre-charging threshold value;
the target duty ratio selection module is used for determining a target duty ratio by combining the maximum duty ratio based on a duty ratio selection rule;
and the soft start pre-charging triggering module is used for triggering the target electrifying driving signal according to the target duty ratio in the current pre-charging period so as to realize the soft start pre-charging of the target suspension capacitor.
Optionally, the maximum duty ratio determining module includes:
the electric parameter acquisition unit is used for acquiring the electric parameters of the target circuit at the current moment when the voltage of the suspension capacitor is smaller than a pre-charging threshold value;
an achievable duty ratio determination unit configured to determine an achievable duty ratio of a target energization driving signal in the target circuit based on the electrical parameter;
a maximum duty ratio determination unit configured to use the achievable duty ratio as a maximum duty ratio of the target energization driving signal in a current precharge period.
Optionally, the target duty ratio selecting module is specifically configured to:
and acquiring a duty ratio selection ratio, and taking the product of the maximum duty ratio and the duty ratio selection ratio as a target duty ratio.
Optionally, the apparatus further comprises:
and the soft start pre-charging stopping module is used for stopping the soft start pre-charging operation of the target floating capacitor when the voltage of the floating capacitor is greater than or equal to the pre-charging threshold value.
According to another aspect of the present invention, there is provided a soft start pre-charge control apparatus including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform a soft start precharge control method according to any of the embodiments of the present invention.
According to another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions for causing a processor to implement a soft-start precharge control method according to any one of the embodiments of the present invention when executed.
According to the technical scheme of the embodiment of the invention, the voltage of the floating capacitor of the target floating capacitor in the target circuit is obtained; when the voltage of the suspension capacitor is smaller than a pre-charging threshold value, determining the maximum duty ratio of a target power-on driving signal in the current pre-charging period according to the electrical parameters of a target circuit; determining a target duty ratio by combining the maximum duty ratio based on a duty ratio selection rule; in the current pre-charging period, a target power-on driving signal is triggered according to a target duty ratio to achieve soft-start pre-charging of a target floating capacitor.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1a shows a circuit schematic of a prior art FC-Boost circuit;
FIG. 1b shows a schematic diagram of the reverse charging of an FC-Boost circuit;
FIG. 2 is a flowchart of a soft-start precharge control method according to an embodiment of the present invention;
FIG. 3a is a schematic diagram of a circuit current path under a first power-on driving signal in a soft-start precharge control method according to an embodiment of the present invention;
FIG. 3b is a schematic diagram of a circuit current path under a second energization driving signal in a soft start precharge control method according to an embodiment of the present invention;
FIG. 3c is a schematic diagram of a current path of a circuit under a third energizing driving signal in a soft start pre-charge control method according to an embodiment of the present invention;
FIG. 3d is a schematic diagram of a current path of a fourth four-way driving signal in a soft start pre-charge control method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a soft start precharge control device according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a soft-start precharge control device implementing the soft-start precharge control method according to the embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," "object," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
Fig. 2 is a flowchart of a soft-start precharge control method according to an embodiment of the present invention, where the embodiment is applicable to a case of performing soft-start precharge on a floating capacitor in an FC-Boost circuit, and the method may be performed by a soft-start precharge control device, where the soft-start precharge control device may be implemented in a form of hardware and/or software, and the soft-start precharge control device may be configured in a photovoltaic module. As shown in fig. 2, the method includes:
and S110, acquiring the voltage of a floating capacitor of a target floating capacitor in the target circuit.
The soft-start pre-charging control method provided by the embodiment can be applied to a scene of performing soft-start pre-charging on a floating capacitor in a photovoltaic module FC-Boost circuit, in the scene, a target circuit can be the FC-Boost circuit, and a target floating capacitor can be a floating capacitor Cf in the FC-Boost circuit.
In practical applications, the energizing driving signal can be periodically controlled to charge the target floating capacitor. In a pre-charging period, the floating capacitor voltage of the target floating capacitor in the target circuit may be obtained, and when the floating capacitor voltage is smaller than the pre-charging threshold, it may be considered that the pre-charging of the target floating capacitor is not completed, and at this time, S120 may be continued.
And S120, when the voltage of the floating capacitor is smaller than the pre-charging threshold value, determining the maximum duty ratio of the target electrifying driving signal in the current pre-charging period according to the electrical parameters of the target circuit.
In this embodiment, the precharge threshold may be understood as a floating capacitor voltage when the floating capacitor completes the precharge, that is, when the floating capacitor voltage of the target floating capacitor is less than the precharge threshold, the precharge of the target floating capacitor may be considered as not completed, and when the floating capacitor voltage of the target floating capacitor is greater than or equal to the precharge threshold, the precharge of the target floating capacitor may be considered as completed.
When the voltage of the floating capacitor is smaller than the pre-charging threshold value, the target floating capacitor needs to be continuously charged, and at the moment, the maximum duty ratio of the current pre-charging period can be determined according to electrical parameters of each component and circuit in the target circuit.
Optionally, the determining the maximum duty ratio of the target power-on driving signal in the current precharge period according to the electrical parameter of the target circuit may be implemented in the following specific manner: collecting the electrical parameters of a target circuit at the current moment; determining an achievable duty cycle of a target energization driving signal in a target circuit according to the electrical parameter; the achievable duty ratio is taken as the maximum duty ratio of the target energization driving signal in the current precharge period.
In this embodiment, the current time may be the start time of the current precharge period. By collecting the electrical parameters of the target circuit at the current moment, the achievable maximum duty ratio of the target power-on driving signal in the current pre-charging period can be calculated.
For example, fig. 3a to fig. 3d provide schematic diagrams of circuit current paths under four types of energization driving signals, and in practical applications, the energization states of T1 and T2 may be controlled to implement a switching state of an FC-Boost three-level circuit. The case where T1 is not energized and T2 is not energized may be referred to as a "00" switch state; the case where T1 is energized and T2 is not energized is referred to as "10" switch state; the case where T1 is not energized and T2 is energized is referred to as "01" switch state; the case of the T1 energization and the T2 energization is referred to as "11" switch state. In fig. 3 a-3 d, the black dashed line may represent a current path. As shown in fig. 3a, when the FC-Boost circuit is in the "00" switch state, the current does not pass through the branch of the target floating capacitor Cf, and cannot precharge the target floating capacitor Cf; as shown in fig. 3b, when the FC-Boost circuit is in the "10" switching state, the current passes through the branch of the target floating capacitor Cf to discharge the target floating capacitor Cf; as shown in fig. 3c, when the FC-Boost circuit is in the "01" switch state, the current passes through the branch of the target floating capacitor Cf, and the target floating capacitor Cf may be precharged; as shown in fig. 3d, when the FC-Boost circuit is in the "11" switch state, the current does not pass through the branch of the target floating capacitor Cf, and the target floating capacitor Cf cannot be precharged. Therefore, the electric signals that drive the T1 non-energization and the T2 energization can be determined as the target energization driving signals.
Optionally, after obtaining the floating capacitor voltage of the target floating capacitor in the target circuit, the soft start precharge control method provided in this embodiment may further include the following steps: and when the voltage of the floating capacitor is greater than or equal to the pre-charging threshold value, stopping the soft start pre-charging operation of the target floating capacitor.
In practical application, when the voltage of the floating capacitor is greater than or equal to the pre-charging threshold, the pre-charging of the target floating capacitor can be considered to be completed, and at this time, the soft-start pre-charging operation of the target floating capacitor is stopped.
And S130, determining a target duty ratio by combining the maximum duty ratio based on a duty ratio selection rule.
In the embodiment, in order to prevent the problems of overvoltage, overcurrent damage and the like of the power circuit, the energizing duty ratio can be properly reduced in one pre-charging period so as to realize the soft-start pre-charging of the target floating capacitor.
Optionally, S130 may be implemented in the following specific manner: and acquiring a duty ratio selection ratio, and taking the product of the maximum duty ratio and the duty ratio selection ratio as a target duty ratio.
In this embodiment, the duty ratio may be preset, and the specific ratio may be adjusted according to an actual application scenario, for example, set to 90%,80%, and the like. In a pre-charging period, the maximum duty ratio is multiplied by the duty ratio selection ratio, and the target duty ratio of the target power-on driving signal in the current pre-charging period can be obtained.
And S140, in the current pre-charging period, triggering a target power-on driving signal according to the target duty ratio so as to realize the soft start pre-charging of the target floating capacitor.
In this embodiment, when the target duty ratio of the target energization driving signal in the current precharge period is obtained, the driving duration of the target energization driving signal may be controlled according to the target duty ratio, so as to accurately control the precharge operation of the target floating capacitor, and implement soft-start precharge of the target floating capacitor.
According to the embodiment of the invention, the voltage of the floating capacitor of the target floating capacitor in the target circuit is obtained; when the voltage of the suspension capacitor is smaller than a pre-charging threshold value, determining the maximum duty ratio of a target power-on driving signal in the current pre-charging period according to the electrical parameters of a target circuit; determining a target duty ratio by combining the maximum duty ratio based on a duty ratio selection rule; in the current pre-charging period, a target power-on driving signal is triggered according to a target duty ratio to achieve soft-start pre-charging of a target floating capacitor.
Example two
Fig. 4 is a schematic structural diagram of a soft start pre-charge control device according to a second embodiment of the present invention. As shown in fig. 4, the apparatus includes:
the floating capacitor voltage obtaining module 210 is configured to obtain a floating capacitor voltage of a target floating capacitor in a target circuit.
And a maximum duty ratio determining module 220, configured to determine, according to the electrical parameter of the target circuit, a maximum duty ratio of the target power-on driving signal in the current precharge period when the voltage of the floating capacitor is smaller than the precharge threshold.
And a target duty ratio selecting module 230, configured to determine a target duty ratio based on a duty ratio selecting rule in combination with the maximum duty ratio.
And a soft start pre-charging triggering module 240, configured to trigger the target power-on driving signal according to the target duty ratio in the current pre-charging period, so as to implement soft start pre-charging of the target floating capacitor.
Optionally, the maximum duty ratio determining module 220 includes:
the electric parameter acquisition unit is used for acquiring the electric parameters of the target circuit at the current moment when the voltage of the suspension capacitor is smaller than a pre-charging threshold value;
an achievable duty ratio determination unit configured to determine an achievable duty ratio of a target energization driving signal in the target circuit based on the electrical parameter;
a maximum duty ratio determination unit configured to use the achievable duty ratio as a maximum duty ratio of the target energization driving signal in a current precharge period.
Optionally, the target duty ratio selecting module 230 is specifically configured to:
and acquiring a duty ratio selection ratio, and taking the product of the maximum duty ratio and the duty ratio selection ratio as a target duty ratio.
Optionally, the apparatus further comprises:
and the soft start pre-charging stopping module is used for stopping the soft start pre-charging operation of the target floating capacitor when the voltage of the floating capacitor is greater than or equal to the pre-charging threshold value.
The soft start pre-charging control device provided by the embodiment of the invention can execute the soft start pre-charging control method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
EXAMPLE III
FIG. 5 illustrates a schematic diagram of a soft start precharge control device 10 that may be used to implement an embodiment of the present invention. The soft start pre-charge control device is intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other suitable computers. The soft-start pre-charge control device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 5, the soft-start precharge control device 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, and the like, wherein the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various suitable actions and processes, such as the soft-start precharge control method described above, according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data necessary for the soft-start precharge control device 10 to operate can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
In some embodiments, the soft-start precharge control method may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as the memory cell 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the soft start pre-charge control device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the soft-start precharge control method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the soft-start precharge control method by any other suitable means (e.g., by means of firmware).
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired result of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A soft-start pre-charge control method is characterized by comprising the following steps:
acquiring the voltage of a suspension capacitor of a target suspension capacitor in a target circuit;
when the voltage of the suspension capacitor is smaller than a pre-charging threshold value, determining the maximum duty ratio of a target electrifying driving signal in the current pre-charging period according to the electrical parameters of the target circuit;
determining a target duty ratio by combining the maximum duty ratio based on a duty ratio selection rule;
and triggering the target electrifying driving signal according to the target duty ratio in the current pre-charging period so as to realize the soft start pre-charging of the target suspension capacitor.
2. The method of claim 1, wherein determining a maximum duty cycle of a target power-on drive signal for a current precharge period based on an electrical parameter of the target circuit comprises:
collecting the electrical parameters of the target circuit at the current moment;
determining an achievable duty cycle of a target power-on drive signal in the target circuit according to the electrical parameter;
and taking the achievable duty ratio as the maximum duty ratio of the target electrifying driving signal in the current pre-charging period.
3. The method of claim 1, wherein determining a target duty cycle in combination with the maximum duty cycle based on a duty cycle selection rule comprises:
and acquiring a duty ratio selection ratio, and taking the product of the maximum duty ratio and the duty ratio selection ratio as a target duty ratio.
4. The method of claim 1, after obtaining the floating-capacitor voltage of the target floating capacitor in the target circuit, further comprising:
and when the voltage of the floating capacitor is greater than or equal to the pre-charging threshold value, stopping the soft-start pre-charging operation of the target floating capacitor.
5. A soft start precharge control device, comprising:
the suspended capacitor voltage acquisition module is used for acquiring the suspended capacitor voltage of a target suspended capacitor in a target circuit;
the maximum duty ratio determining module is used for determining the maximum duty ratio of a target electrifying driving signal in the current pre-charging period according to the electrical parameters of the target circuit when the voltage of the suspension capacitor is smaller than a pre-charging threshold value;
the target duty ratio selection module is used for determining a target duty ratio by combining the maximum duty ratio based on a duty ratio selection rule;
and the soft start pre-charging triggering module is used for triggering the target electrifying driving signal according to the target duty ratio in the current pre-charging period so as to realize the soft start pre-charging of the target suspension capacitor.
6. The apparatus of claim 5, wherein the maximum duty cycle determination module comprises:
the electric parameter acquisition unit is used for acquiring the electric parameters of the target circuit at the current moment when the voltage of the suspension capacitor is smaller than a pre-charging threshold value;
an achievable duty ratio determination unit configured to determine an achievable duty ratio of a target energization driving signal in the target circuit based on the electrical parameter;
a maximum duty ratio determination unit configured to use the achievable duty ratio as a maximum duty ratio of the target energization driving signal in a current precharge period.
7. The apparatus of claim 5, wherein the target duty cycle selection module is specifically configured to:
and acquiring a duty ratio selection ratio, and taking the product of the maximum duty ratio and the duty ratio selection ratio as a target duty ratio.
8. The apparatus of claim 5, further comprising:
and the soft start pre-charging stopping module is used for stopping the soft start pre-charging operation of the target floating capacitor when the voltage of the floating capacitor is greater than or equal to the pre-charging threshold value.
9. A soft start precharge control apparatus, said apparatus comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein, the first and the second end of the pipe are connected with each other,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the soft start precharge control method of any one of claims 1-4.
10. A computer readable storage medium having stored thereon computer instructions for causing a processor to execute a soft start precharge control method as claimed in any one of claims 1 to 4.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116247917A (en) * | 2023-05-10 | 2023-06-09 | 深圳市首航新能源股份有限公司 | Flying capacitor three-level Boost balance circuit and control method |
-
2022
- 2022-08-12 CN CN202210970126.6A patent/CN115313870A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116247917A (en) * | 2023-05-10 | 2023-06-09 | 深圳市首航新能源股份有限公司 | Flying capacitor three-level Boost balance circuit and control method |
| CN116247917B (en) * | 2023-05-10 | 2023-08-29 | 深圳市首航新能源股份有限公司 | Flying capacitor three-level Boost balance circuit and control method |
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