CN114301279A - Switching modulation method and device for boost converter - Google Patents

Abstract

The application provides a switch modulation method and device of a boost converter, a storage medium and electronic equipment. The method comprises the steps of determining charge and discharge state information of a boost converter, wherein the charge and discharge state information at least comprises the following steps: a first charge-discharge state of the target phase main circuit, a second charge-discharge state of the slave circuit corresponding to the target phase main circuit, a third charge-discharge state of the other main circuits except the target phase main circuit, and a fourth charge-discharge state of the other slave circuits; and adjusting the state of the switches arranged on the bridge arms connected with the target phase main loop based on the first charge-discharge state, and adjusting the state of the switches arranged on other bridge arms based on the second charge-discharge state, the third charge-discharge state and the fourth charge-discharge state. The purpose of simultaneously controlling the charging and discharging of a plurality of inductors is achieved, and therefore the technical effect of improving the working efficiency of the boost converter is achieved.

Description

Switching modulation method and device for boost converter

technical field

The present invention relates to the field of converter control, in particular, to a switching modulation method, device, storage medium and electronic equipment of a boost converter.

Background technique

The switching modulation method of the interleaved converter in the prior art is mainly applied to the traditional two-phase interleaved parallel boost converter, single-phase stacked interleaved boost converter, etc. As shown in Figures 1 and 2, each switch controls a The charging state or the discharging state of the inductance, the above method needs to gradually analyze the inductance state to obtain the state of the switch, and the working efficiency of the interleaved converter is low.

For the above problems, no effective solution has been proposed yet.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a switching modulation method, device, storage medium, and electronic device for a boost converter, so as to at least solve the problem in the prior art that the switching modulation method of an interleaved boost converter needs to charge multiple inductors. The problem of low working efficiency of the converter caused by the step-by-step analysis of the discharge.

According to an aspect of the embodiments of the present invention, there is provided a switching modulation method of a boost converter, the method being applied to a multi-phase stacked interleaved boost converter, the boost converter comprising a first number of master loops, slave loops, and A bridge arm, wherein a second number of switches are arranged on each of the bridge arms, including: determining the charge and discharge state information of the boost converter, wherein the charge and discharge state information at least includes: the target phase main circuit The first charge and discharge state, the second charge and discharge state of the slave circuit corresponding to the target phase master circuit, the third charge and discharge state of the other master circuits except the target phase master circuit, and the fourth charge and discharge state of the other slave circuits charge and discharge state; adjust the state of the switch provided on the bridge arm connected to the target phase main circuit based on the first charge and discharge state, and based on the second charge and discharge state, the third charge and discharge state and all The fourth charge-discharge state adjusts the states of switches provided on other bridge arms.

Further, determining the charge-discharge state information of the boost converter includes: determining that the first charge-discharge state is opposite to the second charge-discharge state and the third charge-discharge state; determining the first charge-discharge state The state is the same as the fourth charge and discharge state.

其中，S₁₁、S₁₂为第一桥臂开关，S₂₁、S₂₂为第二桥臂开关，S₃₁、S₃₂为第三桥臂开关，通过控制S₁₁、S₁₂、S₂₁、S₂₂、S₃₁、S₃₂的断开与闭合以控制三相主回路的充放电状态以及三相从回路的充放电状态。Further, the boost converter is a three-phase boost converter, and the sequence of switches set on the bridge arm of the three-phase boost converter is expressed as

Among them, _S11 , _S12 are the first bridge arm switches, S21, _S22 are the second bridge arm switches, _S31 , _S32 are the third bridge arm switches, by controlling _S11 , _S12 , _S21 , _{S 22} , _S31 , _S32 are opened and closed to control the charge and discharge state of the three-phase main circuit and the charge and discharge state of the three-phase slave circuit.

Further, determining the charge-discharge state information of the boost converter includes: controlling the switches S ₁₁ and S ₁₂ of the first bridge arm to be closed, so that the first-phase main circuit is in a charging state; controlling the third bridge arm The switch _S32 is turned off, so that the first phase slave loop is in a discharge state; the second bridge arm switch S22 is controlled to be closed, the _second bridge arm switch S21 is _turned off, and the third bridge arm switch _S31 Disconnect to control the second-phase main circuit and the third-phase main circuit to be in a discharge state, and the second-phase slave circuit and the third-phase slave circuit to be in a charged state.

Further, determining the charge and discharge state information of the boost converter includes: controlling the second bridge arm switches S ₂₁ and S ₂₂ to be closed, so that the second-phase main circuit is in a charging state; controlling the first bridge arm The switch _S12 is turned off, so that the second phase slave loop is in a discharge state; the third bridge arm switch _S32 is controlled to be closed, the first bridge arm switch _S11 is turned off, and the third bridge arm switch _S31 Disconnect to control the first-phase main circuit and the third-phase main circuit to be in a discharge state, and the first-phase slave circuit and the third-phase slave circuit to be in a charged state.

Further, determining the charge-discharge state information of the boost converter includes: controlling the third bridge arm switches S ₃₁ and S ₃₂ to be closed, so that the third-phase main circuit is in a charging state; controlling the second bridge arm The switch _S22 is turned off, so that the third-phase slave loop is in a discharge state; the first bridge arm switch _S12 is controlled to be closed, the second bridge arm switch S21 is _turned off, and the second bridge arm switch _S21 It is disconnected to control the first-phase main circuit and the second-phase main circuit to be in a discharging state, and the first-phase slave circuit and the second-phase slave circuit are in a charging state.

Further, determining the charge and discharge state information of the boost converter includes: controlling the first bridge arm switch S ₁₂ , the second bridge arm switch S ₂₂ , and the third bridge arm switch S ₃₂ to be closed, and Control the first bridge arm switch S ₁₁ , the second bridge arm switch S ₂₁ , and the third bridge arm switch S ₃₁ to be disconnected, so that the three-phase main circuit is in a discharge state, and the three-phase slave circuits are charging.

与目标相从回路连接的桥臂开关状态为

所述其他桥臂的开关状态为

所述目标相从回路是与所述目标相主回路对应的从回路。Further, when S _i,j =1 (i=1,2; j=1,2,3), the bridge arm switch is in a closed state; when S _i,j =0, the bridge arm switch In the disconnected state, if the main circuit of the target phase is in the charging state, the switch state of the bridge arm connected to the main circuit of the target phase is:

The state of the bridge arm switch connected to the target phase slave circuit is

The switch states of the other bridge arms are

The target phase slave circuit is a slave circuit corresponding to the target phase master circuit.

According to another aspect of the embodiments of the present invention, a switching modulation device of a boost converter is provided, the device is applied to a multi-phase stacked interleaved boost converter, and the boost converter includes a first number of main loops, slave loops and a bridge arm, wherein each of the bridge arms is provided with a second number of switches, including: a determination module for determining charge and discharge state information of the boost converter, wherein the charge and discharge state information at least includes : the first charge and discharge state of the main circuit of the target phase, the second charge and discharge state of the slave circuit corresponding to the target phase main circuit, the third charge and discharge state of the other main circuits except the target phase main circuit, and the fourth charge-discharge state of other slave circuits; an adjustment module for adjusting the state of the switch provided on the bridge arm connected to the target-phase master circuit based on the first charge-discharge state, and based on the second charge-discharge state The state, the third charge-discharge state, and the fourth charge-discharge state adjust the states of switches provided on other bridge arms.

According to yet another aspect of the embodiments of the present invention, a non-volatile storage medium is provided, the non-volatile storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing any one of the instructions. The switching modulation method of the described converter.

According to yet another aspect of the embodiments of the present invention, there is provided an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to execute any one of the The switching modulation method of the described converter.

By applying this solution, the charge and discharge state information of the boost converter is determined, wherein the charge and discharge state information at least includes: the first charge and discharge state of the main circuit of the target phase, and the slave circuit corresponding to the main circuit of the target phase. The second charge and discharge state of the target phase, the third charge and discharge state of other main circuits except the target phase main circuit, and the fourth charge and discharge state of other slave circuits; based on the first charge and discharge state adjustment and the target phase The state of the switch provided on the bridge arm connected to the phase main circuit, and the state of the switch provided on the other bridge arms is adjusted based on the second charge and discharge state, the third charge and discharge state, and the fourth charge and discharge state. The purpose of controlling the charging and discharging of multiple inductors at the same time is achieved, thereby achieving the technical effect of improving the working efficiency of the boost converter.

Description of drawings

The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

Figure 1 shows a schematic diagram of a standard two-phase interleaved parallel boost converter;

Figure 2 shows a schematic diagram of a single-phase stacked interleaved boost converter;

Figure 3 shows a multiphase stacked interleaved boost converter;

4 shows a flowchart of a switching modulation method for a boost converter according to an embodiment of the present application;

FIG. 5 shows a three-phase stacked interleaved boost converter according to an embodiment of the present application;

FIG. 6 shows a two-phase stacked interleaved boost converter according to an embodiment of the present application;

FIG. 7 shows a schematic diagram of a switching modulation device of a boost converter according to an embodiment of the present application.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

Example 1

The switching modulation method of the interleaved boost converter mainly involves three kinds of converters, namely the traditional two-phase interleaved parallel boost converter, the single-phase stacked interleaved boost converter, and the multi-phase stacked interleaved boost converter.

Figure 1 is a schematic diagram of the circuit structure of a traditional two-phase interleaved parallel boost converter. As shown in Figure 1, the switching sequence is [S ₁₁ S ₂₁ ], the switch S ₁₁ controls the charging and discharging of the inductor Lp, and the switch S ₂₁ controls The charging and discharging of the inductor Ls. A single switch controls the charging and discharging of a single inductor, so for the switch state, it is necessary to obtain the switch state through further analysis of the inductor state, which reduces the working efficiency.

Figure 2 is a schematic diagram of the circuit structure of a single-phase stacked interleaved converter. As shown in Figure 2, the switching sequence is [S ₁₁ S ₂₁ ], the switch S ₁₁ controls the charging and discharging of the inductor Lp, and the switch S ₂₁ controls the inductor Ls. charge and discharge. A single switch controls the charging and discharging of a single inductor, and each switch only controls the state of one inductor. Therefore, for the switch state, it is necessary to further analyze the inductor state to obtain the switch state, which reduces the work efficiency.

Figure 3 is a schematic diagram of the circuit structure of a multi-phase stacked interleaved converter. As shown in Figure 3, different from single-phase stacked interleaved, one switch of multi-phase stacked interleaved can control the charging or discharging of two inductors, so when determining The inductance must be analyzed one by one in the switching state, which takes a lot of time and greatly reduces the work efficiency.

In view of the above shortcomings, the present invention proposes a parallel staggered switch modulation method based on the multi-phase boost stack staggered topology structure, which can control the charging and discharging of multiple inductors by controlling the switching of the switches, thereby saving the time of analyzing the switching state. time, and greatly improve the working efficiency of the converter.

According to an embodiment of the present invention, an embodiment of a method for switching modulation of a boost converter is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings may be executed in a computer system such as a set of computer-executable instructions, Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that herein.

According to an embodiment of the present invention, an embodiment of a method for switching modulation of a boost converter is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings may be executed in a computer system such as a set of computer-executable instructions. and, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that herein.

FIG. 4 is a switching modulation method of a boost converter according to an embodiment of the present invention. As shown in FIG. 4 , the method is applied to a multi-phase stacked interleaved boost converter, and the boost converter includes a first number of main loops, slave A loop and a bridge arm, wherein each bridge arm is provided with a second number of switches, including:

Step S102, determining the charge and discharge state information of the boost converter, wherein the charge and discharge state information at least includes: the first charge and discharge state of the main circuit of the target phase, and the first charge and discharge state of the slave circuit corresponding to the main circuit of the target phase; Two charge and discharge states, a third charge and discharge state of other main loops except the target phase main loop, and a fourth charge and discharge state of other slave loops;

Step S104, adjusting the state of the switch provided on the bridge arm connected to the target phase main loop based on the first charge and discharge state, and based on the second charge and discharge state, the third charge and discharge state and the The fourth charge-discharge state adjusts the states of switches provided on other bridge arms.

By applying this solution, the charge and discharge state information of the boost converter is determined, wherein the charge and discharge state information at least includes: the first charge and discharge state of the main circuit of the target phase, and the slave circuit corresponding to the main circuit of the target phase. The second charge and discharge state of the target phase, the third charge and discharge state of other main circuits except the target phase main circuit, and the fourth charge and discharge state of other slave circuits; based on the first charge and discharge state adjustment and the target phase The state of the switch provided on the bridge arm connected to the phase main circuit, and the state of the switch provided on the other bridge arms is adjusted based on the second charge and discharge state, the third charge and discharge state, and the fourth charge and discharge state. The purpose of controlling the charging and discharging of multiple inductors at the same time is achieved, thereby achieving the technical effect of improving the working efficiency of the boost converter.

In an optional embodiment, determining the charge-discharge state information of the boost converter includes: determining that the first charge-discharge state is opposite to the second charge-discharge state and the third charge-discharge state; It is determined that the first charge and discharge state is the same as the fourth charge and discharge state.

其中，S₁₁、S₁₂为第一桥臂开关，S₂₁、S₂₂为第二桥臂开关，S₃₁、S₃₂为第三桥臂开关，通过控制S₁₁、S₁₂、S₂₁、S₂₂、S₃₁、S₃₂的断开与闭合以控制三相主回路的充放电状态以及三相从回路的充放电状态。In an optional embodiment, as shown in FIG. 5 , the boost converter is a three-phase boost converter, and the sequence of switches provided on the bridge arms of the three-phase boost converter is expressed as

Among them, _S11 , _S12 are the first bridge arm switches, S21, _S22 are the second bridge arm switches, _S31 , _S32 are the third bridge arm switches, by controlling _S11 , _S12 , _S21 , _{S 22} , _S31 , _S32 are opened and closed to control the charge and discharge state of the three-phase main circuit and the charge and discharge state of the three-phase slave circuit.

其中，1表示闭合，0表示断开。In an optional embodiment, determining the charge-discharge state information of the boost converter includes: controlling the first bridge arm switches S ₁₁ and S ₁₂ to be closed, so that the first-phase main circuit is in a charge state; Control the third bridge arm switch S ₃₂ to open, so that the first phase slave loop is in a discharge state; control the second bridge arm switch S ₂₂ to close, the second bridge arm switch S ₂₁ to open, the The third bridge arm switch S31 is _turned off to control the second-phase main circuit and the third-phase main circuit to be in a discharging state, and the second-phase slave circuit and the third-phase slave circuit are in a charging state. The state of the switch in this state is expressed as

Among them, 1 means closed, 0 means open.

其中，1表示闭合，0表示断开。In an optional embodiment, determining the charge-discharge state information of the boost converter includes: controlling the second bridge arm switches S ₂₁ and S ₂₂ to be closed, so that the second-phase main circuit is in a charge state; The first bridge arm switch _S12 is controlled to be turned off, so that the second phase slave loop is in a discharge state; the third bridge arm switch _S32 is controlled to be closed, the first bridge arm switch _S11 is turned off, and the The third bridge arm switch S31 is _turned off to control the first-phase main circuit and the third-phase main circuit to be in a discharging state, and the first-phase slave circuit and the third-phase slave circuit are in a charging state. The state of the switch in this state is expressed as

Among them, 1 means closed, 0 means open.

其中，1表示闭合，0表示断开。In an optional embodiment, determining the charge-discharge state information of the boost converter includes: controlling the third bridge arm switches S ₃₁ and S ₃₂ to be closed, so that the third-phase main circuit is in a charge state; The second bridge arm switch _S22 is controlled to be turned off, so that the third-phase slave loop is in a discharge state; the first bridge arm switch _S12 is controlled to be closed, the second bridge arm switch S21 is _turned off, and the The second bridge arm switch S21 is _turned off to control the first-phase main circuit and the second-phase main circuit to be in a discharging state, and the first-phase slave circuit and the second-phase slave circuit are in a charging state. The state of the switch in this state is expressed as

Among them, 1 means closed, 0 means open.

其中，1表示闭合，0表示断开。In an optional embodiment, determining the charge and discharge state information of the boost converter includes controlling the first bridge arm switch S ₁₂ , the second bridge arm switch S ₂₂ , and the third bridge arm The switch S ₃₂ is closed, and the first bridge arm switch S ₁₁ , the second bridge arm switch S ₂₁ , and the third bridge arm switch S ₃₁ are controlled to be turned off, so that the three-phase main circuits are in the discharge state, The three-phase slave circuits are all in the charging state, and the state of the switch in this state is expressed as

Among them, 1 means closed, 0 means open.

与目标相从回路连接的桥臂开关状态为

所述其他桥臂的开关状态为

所述目标相从回路是与所述目标相主回路对应的从回路。In an optional embodiment, when Si _,j =1 (i=1,2; j=1,2,3), the bridge arm switch is in a closed state; when Si _,j =0 When the bridge arm switch is in the off state, if the target phase main circuit is in the charging state, the bridge arm switch connected to the target phase main circuit is in the state of

The state of the bridge arm switch connected to the target phase slave circuit is

The switch states of the other bridge arms are

The target phase slave circuit is a slave circuit corresponding to the target phase master circuit.

分为如下几种情形：The embodiment shown in FIG. 6 shows a two-phase stacked interleaved boost converter, and the switches of the two bridge arms are distributed as follows:

Divided into the following situations:

其中，1表示闭合，0表示断开；1) The first-phase main circuit is charged, the first-phase slave circuit is discharged, the second-phase main circuit is discharged, and the second-phase slave circuit is charged. In this state, the state of the switch is expressed as

Among them, 1 means closed, 0 means open;

其中，1表示闭合，0表示断开；2) The second-phase main circuit is charged, the second-phase slave circuit is discharged, the first-phase main circuit is discharged, and the first-phase slave circuit is charged. In this state, the state of the switch is expressed as

Among them, 1 means closed, 0 means open;

其中，1表示闭合，0表示断开；3) When both the first-phase main circuit and the second-phase main circuit are discharged, both slave circuits are charged, and the state of the switch in this state is expressed as

Among them, 1 means closed, 0 means open;

与这一相从回路连接的桥臂的开关状态为

其他桥臂的开关状态为

In summary, the modulation method of the switch can be obtained: which phase main circuit is charged, the switch state of the bridge arm connected to the main circuit of this phase is

The switch state of the bridge arm connected to the slave loop of this phase is

The switch states of the other bridge arms are

Example 2

According to an embodiment of the present invention, an embodiment of an apparatus for implementing the switching modulation method of a boost converter is also provided. FIG. 7 is a schematic structural diagram of a switching modulation apparatus for a boost converter according to an embodiment of the present invention. As shown in FIG. 7 , the switching modulation device of the above-mentioned converter is applied to a multi-phase stacked interleaved boost converter. The boost converter includes a first number of main loops, slave loops and bridge arms, wherein each of the The bridge arm is provided with a second number of switches, including:

The determining module 71 is configured to determine the charge and discharge state information of the boost converter, wherein the charge and discharge state information at least includes: a first charge and discharge state of the main circuit of the target phase, a slave corresponding to the main circuit of the target phase the second charge and discharge state of the loop, the third charge and discharge state of the other main loops except the target phase main loop, and the fourth charge and discharge state of the other slave loops;

The adjustment module 72 is configured to adjust the state of the switch provided on the bridge arm connected to the target phase main circuit based on the first charge and discharge state, and based on the second charge and discharge state and the third charge and discharge state and the fourth charge-discharge state to adjust the states of switches provided on other bridge arms.

It should be noted that the above modules can be implemented by software or hardware. For example, the latter can be implemented in the following ways: the above modules can be located in the same processor; or, the above modules can be arbitrarily combined. in different processors.

It should be noted that, for optional or preferred implementations of this embodiment, reference may be made to the relevant descriptions in Embodiment 1, and details are not repeated here.

The switch modulation device of the above-mentioned converter may also include a processor and a memory, and the above-mentioned determination module 71, adjustment module 72, etc. are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize the corresponding. Function.

The processor includes a kernel, and the kernel calls the corresponding program unit from the memory, and one or more of the above-mentioned kernels can be set. Memory may include non-persistent memory in computer readable media, random access memory (RAM) and/or non-volatile memory, such as read only memory (ROM) or flash memory (flash RAM), the memory including at least one memory chip.

According to the embodiments of the present application, an embodiment of a non-volatile storage medium is also provided. Optionally, in this embodiment, the above-mentioned non-volatile storage medium includes a stored program, wherein when the above-mentioned program runs, the device where the above-mentioned non-volatile storage medium is located is controlled to execute any one of the above-mentioned switching modulation methods of the converter. .

Optionally, in this embodiment, the above-mentioned non-volatile storage medium may be located in any computer terminal in the computer terminal group in the computer network, or in any mobile terminal in the mobile terminal group, the above-mentioned non-volatile storage medium Sexual storage media include stored programs.

Optionally, when the program is running, the device where the non-volatile storage medium is located is controlled to perform the following function: determining the charge and discharge state information of the boost converter, wherein the charge and discharge state information at least includes: A charge and discharge state, a second charge and discharge state of the slave circuit corresponding to the target phase master circuit, a third charge and discharge state of other master circuits except the target phase master circuit, and a fourth charge and discharge state of other slave circuits Discharge state; adjust the state of the switch provided on the bridge arm connected to the target phase main circuit based on the first charge and discharge state, and based on the second charge and discharge state, the third charge and discharge state and the The fourth charge-discharge state adjusts the states of switches provided on other bridge arms.

According to an embodiment of the present application, an embodiment of a processor is also provided. Optionally, in this embodiment, the above-mentioned processor is used to run a program, wherein when the above-mentioned program is running, any one of the above-mentioned switching modulation methods of the converter is executed.

According to an embodiment of the present application, an embodiment of a computer program product is also provided, which, when executed on a data processing device, is adapted to execute a program initialized with the steps of the switching modulation method of any one of the above converters.

Optionally, the above computer program product, when executed on a data processing device, is adapted to execute a program initialized with the following method steps: determining charge and discharge state information of the boost converter, wherein the charge and discharge state information at least Including: the first charge and discharge state of the main circuit of the target phase, the second charge and discharge state of the slave circuit corresponding to the target phase main circuit, the third charge and discharge state of the other main circuits except the target phase main circuit, and the fourth charge and discharge state of other slave circuits; adjust the state of the switch set on the bridge arm connected to the target phase main circuit based on the first charge and discharge state, and based on the second charge and discharge state, the The third charge-discharge state and the fourth charge-discharge state adjust the states of switches provided on other bridge arms.

According to an embodiment of the present application, there is also provided an embodiment of an electronic device, including a memory and a processor, where a computer program is stored in the memory, and the processor is configured to run the computer program to execute any one of the above The switching modulation method of the converter.

The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages or disadvantages of the embodiments.

In the above-mentioned embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are only illustrative, for example, the division of the units may be a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components may be combined or Integration into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of units or modules, and may be in electrical or other forms.

The units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable non-volatile storage medium. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the prior art, or all or part of the technical solution can be stored in a non-volatile In a non-volatile storage medium, several instructions are included to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned non-volatile storage media include: U disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), removable hard disk, magnetic disk or optical disk and other various storage media medium of program code.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (11)

1. A method of switching modulation for a boost converter, the method being applied to a multiphase stacked interleaved boost converter, the boost converter including a first number of master loops, slave loops, and legs, wherein each of the legs has a second number of switches disposed thereon, comprising:

determining charge and discharge state information of the boost converter, wherein the charge and discharge state information at least comprises: a first charge-discharge state of a target phase main circuit, a second charge-discharge state of a slave circuit corresponding to the target phase main circuit, a third charge-discharge state of a master circuit other than the target phase main circuit, and a fourth charge-discharge state of other slave circuits;

and adjusting the state of switches arranged on the bridge arm connected with the target phase main loop based on the first charge-discharge state, and adjusting the state of switches arranged on other bridge arms based on the second charge-discharge state, the third charge-discharge state and the fourth charge-discharge state.

2. The method of claim 1, wherein determining charge and discharge state information of the boost converter comprises:

determining that the first charge-discharge state is opposite to the second charge-discharge state and the third charge-discharge state;

and determining that the first charge-discharge state is the same as the fourth charge-discharge state.

3. The method of claim 1, wherein the boost converter is a three-phase boost converter, and the sequence of switches arranged on the legs of the three-phase boost converter is represented as

Wherein S is₁₁、S₁₂Is a first bridge arm switch, S₂₁、S₂₂Is a second leg switch, S₃₁、S₃₂For the third arm switch by controlling S₁₁、S₁₂、S₂₁、S₂₂、S₃₁、S₃₂To control the charge and discharge state of the three-phase main circuit and the charge and discharge state of the three-phase slave circuit.

4. The method of claim 3, wherein determining charge and discharge state information of the boost converter comprises:

controlling the first bridge arm switch S₁₁、S₁₂Closing to enable the first phase main loop to be in a charging state;

controlling the third bridge arm switch S₃₂Disconnecting to make the first phase in a discharging state from the loop;

controlling the second bridge arm switch S₂₂Closed, the second leg switch S₂₁Off, the third arm switch S₃₁And disconnecting the circuit to control the second-phase main circuit and the third-phase main circuit to be in a discharging state, and the second-phase slave circuit and the third-phase slave circuit to be in a charging state.

5. The method of claim 3, wherein determining charge and discharge state information of the boost converter comprises:

controlling the second bridge arm switch S₂₁、S₂₂Closing to enable the second phase main loop to be in a charging state;

controlling the first bridge arm switch S₁₂Disconnecting to make the second phase in a discharging state from the loop;

controlling the third bridge arm switch S₃₂Closed, the first bridge arm switch S₁₁Off, the third arm switch S₃₁And disconnecting the first phase main circuit and the third phase main circuit to control the first phase main circuit and the third phase main circuit to be in a discharging state, and controlling the first phase slave circuit and the third phase slave circuit to be in a charging state.

6. The method of claim 3, wherein determining charge and discharge state information of the boost converter comprises:

controlling the third bridge arm switch S₃₁、S₃₂Closing to enable the third phase main loop to be in a charging state;

controlling the second bridge arm switch S₂₂Disconnecting to make the third phase in a discharging state from the loop;

controlling the first bridge arm switch S₁₂Closed, the second leg switch S₂₁Off, the second bridge arm switch S₂₁And disconnecting the first phase main loop and the second phase main loop to control the first phase main loop and the second phase main loop to be in a discharging state, and controlling the first phase slave loop and the second phase slave loop to be in a charging state.

7. The method of claim 3, wherein determining charge and discharge state information of the boost converter comprises:

controlling the first bridge arm switch S₁₂The second bridge arm switch S₂₂The third bridge arm switch S₃₂Closed and controls the first bridge arm switch S₁₁The second bridge arm switch S₂₁The third bridge arm switch S₃₁And disconnecting the three-phase main loop and the three-phase auxiliary loop so that the three-phase main loop and the three-phase auxiliary loop are in a discharging state and a charging state respectively.

8. The method according to any one of claims 3 to 7, wherein S is measured as_i,jWhen the value is 1(i is 1, 2; j is 1,2,3), the bridge arm switch is in a closed state; when S is_i,jWhen the target phase main loop is in a charging state, the bridge arm switch connected with the target phase main loop is in a disconnected state

The bridge arm connected with the target phase slave loop has a switch state of

The switching states of the other bridge arms are

The target phase slave circuit is a slave circuit corresponding to the target phase master circuit.

9. A switching modulation apparatus for a boost converter, the apparatus being applied to a multiphase stacked interleaved boost converter, the boost converter including a first number of master loops, slave loops, and legs, wherein each of the legs has a second number of switches disposed thereon, comprising:

a determining module, configured to determine charge and discharge state information of the boost converter, where the charge and discharge state information at least includes: a first charge-discharge state of a target phase main circuit, a second charge-discharge state of a slave circuit corresponding to the target phase main circuit, a third charge-discharge state of a master circuit other than the target phase main circuit, and a fourth charge-discharge state of other slave circuits;

and the adjusting module is used for adjusting the state of the switch arranged on the bridge arm connected with the target phase main loop based on the first charging and discharging state and adjusting the state of the switch arranged on other bridge arms based on the second charging and discharging state, the third charging and discharging state and the fourth charging and discharging state.

10. A non-volatile storage medium, characterized in that it stores a plurality of instructions adapted to be loaded by a processor and to execute the method of switching modulation of a converter according to any one of claims 1 to 8.

11. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and the processor is configured to execute the computer program to perform the method of switching modulation of a converter according to any one of claims 1 to 8.

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