CN114362562A - Control method of three-phase PFC circuit, terminal and storage medium - Google Patents
Control method of three-phase PFC circuit, terminal and storage medium Download PDFInfo
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Abstract
The invention provides a control method of a three-phase PFC circuit, a terminal and a storage medium. The method comprises the following steps: acquiring working parameters of a three-phase PFC circuit; if the working parameters of the three-phase PFC circuit meet a first preset condition, controlling one phase of the three-phase PFC circuit to stop working, and simultaneously controlling the remaining two phases of the three-phase PFC circuit to continue working; one phase of the three-phase PFC circuit is any one phase of the three-phase PFC circuit or one phase determined according to a first preset rotation sequence. The invention can control one phase not to work when the three-phase PFC circuit is lightly loaded, can save energy by supplying power to the load through two phases, and can select a certain phase which stops working according to the first preset alternate sequence, thereby enabling each phase to alternately work, ensuring the service life balance of each corresponding device and improving the availability of the three-phase PFC circuit.
Description
Technical Field
The present invention relates to the field of circuit control technologies, and in particular, to a control method, a terminal, and a storage medium for a three-phase PFC circuit.
Background
A three-phase PFC (Power Factor Correction) circuit may also be referred to as a three-phase AC-DC converter. When a three-phase PFC circuit operates, generally, three phases thereof are in an operating state. However, this operation mode is prone to cause energy waste in a light load state, and the three phases are all in an operating state for a long time, which is prone to cause equipment damage and reduces the usability of the three-phase PFC circuit.
Disclosure of Invention
The embodiment of the invention provides a control method, a terminal and a storage medium of a three-phase PFC circuit, and aims to solve the problems that energy waste is easily caused and the usability of the three-phase PFC circuit is easily reduced in the prior art.
In a first aspect, an embodiment of the present invention provides a method for controlling a three-phase PFC circuit, including:
acquiring working parameters of a three-phase PFC circuit;
if the working parameters of the three-phase PFC circuit meet a first preset condition, controlling one phase of the three-phase PFC circuit to stop working, and simultaneously controlling the remaining two phases of the three-phase PFC circuit to continue working;
one phase of the three-phase PFC circuit is any one phase of the three-phase PFC circuit or one phase determined according to a first preset rotation sequence.
In one possible implementation manner, controlling one phase of the three-phase PFC circuit to stop operating and controlling the remaining two phases of the three-phase PFC circuit to continue operating includes:
if the three-phase PFC circuit is a three-phase four-wire PFC circuit, stopping sending the driving signal to one corresponding switching tube of the three-phase PFC circuit, and meanwhile continuing sending the driving signal to the remaining two corresponding switching tubes of the three-phase PFC circuit;
if the three-phase PFC circuit is a three-phase three-wire PFC circuit, the driving signal is stopped being sent to one corresponding switching tube of the three-phase PFC circuit, and meanwhile, the current phases of the remaining two phases of the three-phase PFC circuit are adjusted by adjusting the duty ratio of the driving signals of the corresponding switching tubes of the remaining two phases of the three-phase PFC circuit, so that the remaining two phases of the three-phase PFC circuit work in a single-phase PFC mode.
In one possible implementation, the operating parameter of the three-phase PFC circuit includes an input current of the three-phase PFC circuit;
the first preset condition is that the input current of the three-phase PFC circuit is smaller than a first preset current threshold value.
In a possible implementation manner, the first preset condition is that the input current of the three-phase PFC circuit is smaller than a first preset current threshold, and a duration that the input current of the three-phase PFC circuit is smaller than the first preset current threshold is longer than a first preset duration.
In one possible implementation manner, after obtaining the operating parameters of the three-phase PFC circuit, the method for controlling the three-phase PFC circuit further includes:
if the working parameters of the three-phase PFC circuit meet a second preset condition and the three-phase PFC circuit is a three-phase four-wire PFC circuit, controlling two phases of the three-phase PFC circuit to stop working and simultaneously controlling the rest of the three-phase PFC circuit to continuously work;
wherein, two phases of the three-phase PFC circuit are any two phases of the three-phase PFC circuit or two phases of the three-phase PFC circuit determined according to a second preset rotation sequence.
In one possible implementation, controlling two of the phases of the three-phase PFC circuit to stop operating while controlling the remaining one of the phases of the three-phase PFC circuit to continue operating includes:
and stopping sending the driving signals to the corresponding switching tubes of two of the three-phase PFC circuit, and simultaneously continuing sending the driving signals to the corresponding remaining switching tubes of the three-phase PFC circuit.
In one possible implementation, the operating parameter of the three-phase PFC circuit includes an input current of the three-phase PFC circuit;
the second preset condition is that the input current of the three-phase PFC circuit is smaller than a second preset current threshold.
In a possible implementation manner, the second preset condition is that the input current of the three-phase PFC circuit is smaller than a second preset current threshold, and a duration that the input current of the three-phase PFC circuit is smaller than the second preset current threshold is longer than a second preset duration.
In a second aspect, an embodiment of the present invention provides a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method for controlling a three-phase PFC circuit according to the first aspect or any one of the possible implementations of the first aspect when executing the computer program.
In a third aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored, and the computer program, when executed by a processor, implements the steps of the method for controlling a three-phase PFC circuit according to the first aspect or any one of the possible implementation manners of the first aspect.
The embodiment of the invention provides a control method, a terminal and a storage medium of a three-phase PFC circuit, wherein by acquiring working parameters of the three-phase PFC circuit, when the working parameters of the three-phase PFC circuit are detected to meet a first preset condition, one phase of the three-phase PFC circuit is controlled to stop working, and the remaining two phases of the three-phase PFC circuit are controlled to continue working, so that when the three-phase PFC circuit is lightly loaded, one phase of the three-phase PFC circuit is controlled to not work, power is supplied to a load through the two phases, energy can be saved, and the service life of corresponding equipment can be prolonged in a mode that a certain phase does not work; in addition, one phase of the three-phase PFC circuit is any one phase of the three-phase PFC circuit or one phase determined according to a first preset rotation sequence, and a certain phase which stops working is selected according to the first preset rotation sequence, so that each phase of rotation does not work, the service life of each corresponding device is ensured to be balanced, and the availability of the three-phase PFC circuit is improved.
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 embodiments or the prior art descriptions will be briefly described 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 inventive exercise.
Fig. 1 is a flowchart illustrating an implementation of a control method of a three-phase PFC circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a three-phase four-wire PFC circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a three-phase three-wire PFC circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of the current phase of the three-phase three-wire PFC circuit before and after the V-phase is turned off according to the embodiment of the present invention;
fig. 5 is a schematic diagram of the current phases of a three-phase four-wire PFC circuit before and after the V-phase and W-phase are turned off according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a control device of a three-phase PFC circuit according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a terminal 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 particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the 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 make the objects, technical solutions and advantages of the present invention more apparent, the following description is made by way of specific embodiments with reference to the accompanying drawings.
Referring to fig. 1, it shows a flowchart of an implementation of a control method of a three-phase PFC circuit according to an embodiment of the present invention, where an execution main body of the control method of the three-phase PFC circuit may be a terminal, and the terminal may be a controller.
Referring to fig. 1, the control method of the three-phase PFC circuit is detailed as follows:
in S101, operating parameters of the three-phase PFC circuit are acquired.
The embodiment can acquire the working parameters of the three-phase PFC circuit in real time, and judge whether the three-phase PFC circuit is in a light load state by detecting the working parameters of the three-phase PFC circuit, so as to judge whether one-phase or two-phase work can be stopped.
The operating parameter of the three-phase PFC circuit may include at least one of an input current, an input voltage, an output current, and an output voltage of the three-phase PFC circuit.
In S102, if the operating parameter of the three-phase PFC circuit satisfies a first preset condition, controlling one phase of the three-phase PFC circuit to stop operating, and simultaneously controlling the remaining two phases of the three-phase PFC circuit to continue operating;
one phase of the three-phase PFC circuit is any one phase of the three-phase PFC circuit or one phase determined according to a first preset rotation sequence.
In this embodiment, if it is detected that the operating parameter of the three-phase PFC circuit satisfies the first preset condition, it may be determined that the three-phase PFC circuit is in a light-load state, at this time, one phase of the three-phase PFC circuit may be controlled not to operate, the other two phases may continue to operate, and power is supplied to the load through the remaining two phases. Illustratively, the U phase can be controlled not to work, and the V phase and the W phase can be controlled to work continuously.
In a possible implementation manner, if the working parameters of the three-phase PFC circuit satisfy a first preset condition, any one phase of the three-phase PFC circuit is selected, the phase is controlled not to work, and simultaneously the remaining two phases are controlled to continue to work.
In a possible implementation manner, if the working parameters of the three-phase PFC circuit satisfy a first preset condition, one of the phases is selected according to a first preset rotation sequence, the phase is controlled not to work, and simultaneously the remaining two phases are controlled to continue to work.
The first preset rotation order may be set according to actual requirements, and for example, the first preset rotation order may be U, V, W, or U, W, V, and the like, and is not limited herein.
Through first preset in turn order, can control different looks inoperative at every turn to can make each corresponding equipment rest in turn, improve its life-span. For example, assuming that the first preset rotation order is U, V, W, this time U-phase is selected to stop working, the next time V-phase is selected to stop working according to the order, and so on.
As can be seen from the above description, in this embodiment, by obtaining the working parameters of the three-phase PFC circuit, when it is detected that the working parameters of the three-phase PFC circuit satisfy the first preset condition, one phase of the three-phase PFC circuit is controlled to stop working, and meanwhile, the remaining two phases of the three-phase PFC circuit are controlled to continue working, so that when the three-phase PFC circuit is lightly loaded, one phase of the three-phase PFC circuit is controlled to not work, power is supplied to the load through the two phases, energy can be saved, and the service life of the corresponding device can be prolonged by making one phase not work; in addition, one phase of the three-phase PFC circuit is any one phase of the three-phase PFC circuit or one phase determined according to a first preset rotation sequence, and a certain phase which stops working is selected according to the first preset rotation sequence, so that each phase of rotation does not work, the service life of each corresponding device is ensured to be balanced, and the availability of the three-phase PFC circuit is improved.
In some embodiments, the step of controlling one phase of the three-phase PFC circuit to stop operating and controlling the remaining two phases of the three-phase PFC circuit to continue operating in S102 may include:
if the three-phase PFC circuit is a three-phase four-wire PFC circuit, stopping sending the driving signal to one corresponding switching tube of the three-phase PFC circuit, and meanwhile continuing sending the driving signal to the remaining two corresponding switching tubes of the three-phase PFC circuit;
if the three-phase PFC circuit is a three-phase three-wire PFC circuit, the driving signal is stopped being sent to one corresponding switching tube of the three-phase PFC circuit, and meanwhile, the current phases of the remaining two phases of the three-phase PFC circuit are adjusted by adjusting the duty ratio of the driving signals of the corresponding switching tubes of the remaining two phases of the three-phase PFC circuit, so that the remaining two phases of the three-phase PFC circuit work in a single-phase PFC mode.
The three-phase four-wire PFC circuit is a three-phase PFC circuit with a zero line (N line), and its structure is shown in fig. 2. The three-phase four-wire PFC circuit includes ports U, V, W and N for connection to an input power source, inductors L1, L2 and L3, capacitors C1, C2, C3, C4 and C5, and switching tubes S1, S2, S3, S4, S5 and S6. The two ends of the capacitor C4 are respectively connected with BUS + and NBUS, and the two ends of the capacitor C5 are respectively connected with NBUS and BUS-. The specific connection relationship of the circuit can be seen in fig. 2, and is not described in detail.
Because each phase of the three-phase four-wire PFC circuit can form a loop with a zero line, the three phases are not influenced mutually, any one phase or any two phases can be controlled to stop working, the remaining two phases or the remaining one phase can be controlled to continuously work, and the normal work can be realized without adjusting the phase.
The three-phase PFC circuit needs to continuously send a driving signal to each corresponding switching tube to enable each phase to work. Therefore, when the three-phase PFC circuit is a three-phase four-wire PFC circuit, the phase can stop working only by stopping sending the driving signal to one corresponding switching tube of the three-phase PFC circuit, and the remaining two phases can continue working by continuously keeping sending the driving signal to the corresponding switching tubes of the remaining two phases. In the three-phase four-wire PFC circuit, the driving signals sent to the switching tubes corresponding to the remaining two phases and the driving signals sent to the switching tubes when the three phases work together can be kept unchanged without adjustment.
Referring to fig. 2, U corresponds to switching tubes S1 and S2, V corresponds to switching tubes S3 and S4, and W corresponds to switching tubes S5 and S6. When the control V phase does not operate, the transmission of the driving signals to S3 and S4 is stopped, and the transmission of the driving signals to S1, S2, S5, and S6 is continued.
The above-described continuation of the transmission of the drive signals to the switching tubes corresponding to the remaining two phases of the three-phase PFC circuit does not mean the transmission of the same drive signals to the switching tubes corresponding to the remaining two phases of the three-phase PFC circuit, but means the continuation of the transmission of the drive signals.
The three-phase three-wire PFC circuit is a PFC circuit without a zero wire, and the structure of the three-phase three-wire PFC circuit is shown in fig. 3. The three-phase three-wire PFC circuit includes ports U, V and W for connection with an input power source, inductors L1, L2 and L3, capacitors C1, C2, C3 and C4, and switching tubes S1, S2, S3, S4, S5 and S6. The two ends of the capacitor C4 are respectively connected with BUS + and BUS-. The specific connection relationship of the circuit can be seen in fig. 3, and is not described in detail.
Since the three-phase three-wire PFC has no neutral line, at least two phases are required to form the circuit. That is, the three-phase three-wire PFC can only control one phase to stop working at most, and cannot control two phases to stop working. When two phases of the three-phase three-wire PFC circuit are controlled to stop working, the circuit can not continue to work normally.
In the three-phase three-wire PFC circuit, one phase is controlled to stop working, and the remaining two phases are controlled to continue working, so that the driving of one phase needing to stop working is required to be turned off, and the duty ratios of driving signals of corresponding switch tubes of the remaining two phases are required to be adjusted, so that the current phases of the remaining two phases are adjusted, and the remaining two phases of the three-phase PFC circuit work in a single-phase PFC mode. The single-phase PFC mode refers to a single-phase PFC operation mode, and the driving signal sent to each switching tube to be operated in the single-phase PFC operation mode is different from the driving signal sent to the switching tube to be operated in the three-phase PFC operation mode, so that the duty ratios of the driving signals of the remaining two corresponding switching tubes need to be adjusted.
Referring to fig. 3, it is assumed that the V phase stops operating, the U phase and the V phase continue operating sequentially, and the three-phase three-wire PFC circuit at this time is equivalent to a single-phase PFC composed of UW and needs to operate in a single-phase PFC mode. For example, the U-phase may be regarded as an L-line, and the W-phase may be regarded as an N-line, which corresponds to a single-phase PFC of L-N.
Referring to fig. 4, the left side of fig. 4 shows the current phases of the three phases when the three phases of the three-phase three-wire PFC circuit are all in operation, and the right side of fig. 4 shows the current phase of the single-phase PFC composed of U, W phases with the V-phase being closed, which is changed by 30 degrees compared with the current phase of the original U-phase. The change can be realized by adjusting the duty ratio of the driving signal of the corresponding switching tube, and the change can be specifically adjusted by adopting the existing method and is not repeated.
In some embodiments, the operating parameter of the three-phase PFC circuit comprises an input current of the three-phase PFC circuit;
the first preset condition is that the input current of the three-phase PFC circuit is smaller than a first preset current threshold value.
In the embodiment, whether the three-phase PFC circuit is in the light-load state is judged through the input current, and when the input current is smaller than a first preset current threshold value, the three-phase PFC circuit is determined to be in the light-load state, one phase of the three-phase PFC circuit is controlled to stop working, and meanwhile, the rest two phases of the three-phase PFC circuit are controlled to continue working.
The first preset current threshold may be set according to actual requirements, and is not particularly limited.
In some embodiments, the first preset condition is that the input current of the three-phase PFC circuit is less than a first preset current threshold, and the duration of the input current of the three-phase PFC circuit being less than the first preset current threshold is greater than a first preset duration.
In this embodiment, in order to prevent erroneous determination or prevent control of repeated switching between an operating state and an inoperative state of one of the phases, an additional condition is added on the basis of determining that the input current is smaller than the first preset current threshold, and meanwhile, whether the duration of the input current smaller than the first preset current threshold is longer than the first preset duration is determined, if both the duration and the duration are satisfied, the three-phase PFC circuit is determined to be in a light-load state, one of the phases of the three-phase PFC circuit is controlled to stop operating, and meanwhile, the remaining two phases of the three-phase PFC circuit are controlled to continue operating.
The first preset time period may be set according to an actual requirement, and may be, for example, 5 seconds, 10 seconds, and the like.
In some embodiments, after obtaining the operating parameters of the three-phase PFC circuit, the method for controlling the three-phase PFC circuit further includes:
if the working parameters of the three-phase PFC circuit meet a second preset condition and the three-phase PFC circuit is a three-phase four-wire PFC circuit, controlling two phases of the three-phase PFC circuit to stop working and simultaneously controlling the rest of the three-phase PFC circuit to continuously work;
wherein, two phases of the three-phase PFC circuit are any two phases of the three-phase PFC circuit or two phases of the three-phase PFC circuit determined according to a second preset rotation sequence.
And when the working parameters of the three-phase PFC circuit meet the second preset condition and the working parameters of the three-phase PFC circuit meet the first preset condition, the three-phase PFC circuit is in a light load state of different degrees. And the load rate of the three-phase PFC circuit when the working parameters of the three-phase PFC circuit meet the second preset condition is smaller than the load rate of the three-phase PFC circuit when the working parameters of the three-phase PFC circuit meet the first preset condition.
For example, when the working parameters of the three-phase PFC circuit satisfy a first preset condition, the load factor of the three-phase PFC circuit is 50%; and when the working parameters of the three-phase PFC circuit meet a second preset condition, the load rate of the three-phase PFC circuit is 30%.
Since the three-phase four-wire PFC circuit can keep only one phase operating, when the circuit satisfies the second preset condition, two phases of the circuit can be controlled to stop operating while the remaining one is controlled to operate successively.
The second preset rotation sequence may be the same as or different from the first preset rotation sequence, and is not limited herein.
In some embodiments, controlling two of the phases of the three-phase PFC circuit to cease operation while controlling the remaining one of the phases of the three-phase PFC circuit to continue operation includes:
and stopping sending the driving signals to the corresponding switching tubes of two of the three-phase PFC circuit, and simultaneously continuing sending the driving signals to the corresponding remaining switching tubes of the three-phase PFC circuit.
According to the foregoing description, any two phases of the three-phase four-wire PFC circuit do not affect each other. Therefore, two phases of the power supply are controlled to stop working, the driving of the switch tubes corresponding to the two phases is directly closed, and the driving of the switch tube of the remaining one phase is continuously maintained.
Referring to fig. 5, the left side of fig. 5 shows the current phase of the three phases when the three phases of the three-phase four-wire PFC circuit are all working, the right side of fig. 5 shows the current phase of the U phase after the three-phase four-wire PFC circuit closes the V and W phases, and the zero line exists, so that the V and W phases are closed, the phase of the U-phase current is not affected, and the current flows from U to N.
In some embodiments, the operating parameter of the three-phase PFC circuit comprises an input current of the three-phase PFC circuit;
the second preset condition is that the input current of the three-phase PFC circuit is smaller than a second preset current threshold. At this time, the first preset condition is that the input current of the three-phase PFC circuit is smaller than a first preset current threshold and not smaller than a second preset current threshold.
And the second preset current threshold is smaller than the first preset current threshold. The second preset current threshold may be set according to actual requirements, and is not particularly limited herein.
In some embodiments, the second preset condition is that the input current of the three-phase PFC circuit is smaller than a second preset current threshold, and the duration of the input current of the three-phase PFC circuit being smaller than the second preset current threshold is longer than a second preset duration. At this time, the first preset condition is that the input current of the three-phase PFC circuit is smaller than a first preset current threshold and not smaller than a second preset current threshold, and the duration of the input current of the three-phase PFC circuit being smaller than the first preset current threshold and not smaller than the second preset current threshold is longer than a first preset duration.
The first preset time period and the second preset time period may be equal to or unequal to each other, and are not particularly limited. The second preset time period may be set according to actual requirements, and may be 5 seconds, 10 seconds, and the like, for example.
In a possible implementation manner, after the controlling two phases of the three-phase PFC circuit stop operating and simultaneously control the remaining one of the three-phase PFC circuit to operate successively, the method for controlling the three-phase PFC circuit further includes:
if the three-phase PFC circuit is a three-phase four-wire PFC circuit, the working parameters of the three-phase PFC circuit do not meet the second preset condition, and the working parameters of the three-phase PFC circuit meet the first preset condition, controlling any one of two phases which stop working to resume working, or controlling both two phases (two phases of the three-phase PFC circuit) which stop working to resume working, and simultaneously controlling one phase (the rest one phase of the three-phase PFC circuit) which is working to stop working;
and if the three-phase PFC circuit is a three-phase four-wire PFC circuit, the working parameters of the three-phase PFC circuit do not meet the second preset condition, and the working parameters of the three-phase PFC circuit do not meet the first preset condition, controlling the two phases which stop working to recover to work, namely controlling the three phases to work.
In a possible implementation manner, after the step S102 of controlling one phase of the three-phase PFC circuit to stop operating and simultaneously controlling the remaining two phases of the three-phase PFC circuit to continue operating, the method for controlling the three-phase PFC circuit further includes:
and if the working parameters of the three-phase PFC circuit do not meet the first preset condition and the working parameters of the three-phase PFC circuit do not meet the second preset condition, controlling one phase of the three-phase PFC circuit, which stops working, to recover to work, namely controlling the three phases to work.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
The following are embodiments of the apparatus of the invention, reference being made to the corresponding method embodiments described above for details which are not described in detail therein.
Fig. 6 is a schematic structural diagram of a control device of a three-phase PFC circuit according to an embodiment of the present invention, and for convenience of description, only the portions related to the embodiment of the present invention are shown, and detailed descriptions are as follows:
as shown in fig. 6, the control device 100 of the three-phase PFC circuit includes: an acquisition module 101 and a first control module 102.
An obtaining module 101, configured to obtain working parameters of a three-phase PFC circuit;
the first control module 102 is configured to control one phase of the three-phase PFC circuit to stop working and control the remaining two phases of the three-phase PFC circuit to continue working if the working parameter of the three-phase PFC circuit meets a first preset condition;
one phase of the three-phase PFC circuit is any one phase of the three-phase PFC circuit or one phase determined according to a first preset rotation sequence.
In one possible implementation, the first control module 102 is specifically configured to:
if the three-phase PFC circuit is a three-phase four-wire PFC circuit, stopping sending the driving signal to one corresponding switching tube of the three-phase PFC circuit, and meanwhile continuing sending the driving signal to the remaining two corresponding switching tubes of the three-phase PFC circuit;
if the three-phase PFC circuit is a three-phase three-wire PFC circuit, the driving signal is stopped being sent to one corresponding switching tube of the three-phase PFC circuit, and meanwhile, the current phases of the remaining two phases of the three-phase PFC circuit are adjusted by adjusting the duty ratio of the driving signals of the corresponding switching tubes of the remaining two phases of the three-phase PFC circuit, so that the remaining two phases of the three-phase PFC circuit work in a single-phase PFC mode.
In one possible implementation, the operating parameter of the three-phase PFC circuit includes an input current of the three-phase PFC circuit;
the first preset condition is that the input current of the three-phase PFC circuit is smaller than a first preset current threshold value.
In a possible implementation manner, the first preset condition is that the input current of the three-phase PFC circuit is smaller than a first preset current threshold, and a duration that the input current of the three-phase PFC circuit is smaller than the first preset current threshold is longer than a first preset duration.
In one possible implementation, the control apparatus 100 of the three-phase PFC circuit further includes: and a second control module.
The second control module is used for controlling two phases of the three-phase PFC circuit to stop working and simultaneously controlling the rest of the three-phase PFC circuit to continuously work if the working parameters of the three-phase PFC circuit meet a second preset condition and the three-phase PFC circuit is a three-phase four-wire PFC circuit;
wherein, two phases of the three-phase PFC circuit are any two phases of the three-phase PFC circuit or two phases of the three-phase PFC circuit determined according to a second preset rotation sequence.
In a possible implementation manner, the second control module is specifically configured to:
and stopping sending the driving signals to the corresponding switching tubes of two of the three-phase PFC circuit, and simultaneously continuing sending the driving signals to the corresponding remaining switching tubes of the three-phase PFC circuit.
In one possible implementation, the operating parameter of the three-phase PFC circuit includes an input current of the three-phase PFC circuit;
the second preset condition is that the input current of the three-phase PFC circuit is smaller than a second preset current threshold.
In a possible implementation manner, the second preset condition is that the input current of the three-phase PFC circuit is smaller than a second preset current threshold, and a duration that the input current of the three-phase PFC circuit is smaller than the second preset current threshold is longer than a second preset duration.
Fig. 7 is a schematic diagram of a terminal according to an embodiment of the present invention. As shown in fig. 7, the terminal 11 of this embodiment includes: a processor 110, a memory 111 and a computer program 112 stored in said memory 111 and executable on said processor 110. The processor 110, when executing the computer program 112, implements the steps in the control method embodiments of the respective three-phase PFC circuits described above, such as S101 to S102 shown in fig. 1. Alternatively, the processor 110, when executing the computer program 112, implements the functions of each module/unit in the above-mentioned device embodiments, for example, the functions of the modules/units 101 to 102 shown in fig. 6.
Illustratively, the computer program 112 may be partitioned into one or more modules/units that are stored in the memory 111 and executed by the processor 110 to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 112 in the terminal 11. For example, the computer program 112 may be divided into the modules/units 101 to 102 shown in fig. 6.
The terminal 11 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal 11 may include, but is not limited to, a processor 110, a memory 111. Those skilled in the art will appreciate that fig. 7 is merely an example of a terminal 11 and does not constitute a limitation of terminal 11 and may include more or less components than those shown, or combine certain components, or different components, e.g., the terminal may also include input-output devices, network access devices, buses, etc.
The Processor 110 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 111 may be an internal storage unit of the terminal 11, such as a hard disk or a memory of the terminal 11. The memory 111 may also be an external storage device of the terminal 11, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the terminal 11. Further, the memory 111 may also include both an internal storage unit and an external storage device of the terminal 11. The memory 111 is used for storing the computer program and other programs and data required by the terminal. The memory 111 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
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 implementation. 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 invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other ways. For example, the above-described apparatus/terminal embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the above embodiments may be implemented by a computer program, which may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the steps of the control method embodiments of the three-phase PFC circuit may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A control method of a three-phase PFC circuit is characterized by comprising the following steps:
acquiring working parameters of the three-phase PFC circuit;
if the working parameters of the three-phase PFC circuit meet a first preset condition, controlling one phase of the three-phase PFC circuit to stop working, and simultaneously controlling the remaining two phases of the three-phase PFC circuit to continue working;
one phase of the three-phase PFC circuit is any one phase of the three-phase PFC circuit or one phase determined according to a first preset rotation sequence.
2. The method as claimed in claim 1, wherein the controlling of one of the phases of the three-phase PFC circuit to stop operating while controlling the remaining two phases of the three-phase PFC circuit to continue operating comprises:
if the three-phase PFC circuit is a three-phase four-wire PFC circuit, stopping sending a driving signal to one corresponding switching tube of the three-phase PFC circuit, and meanwhile, continuously sending the driving signal to the remaining two corresponding switching tubes of the three-phase PFC circuit;
if the three-phase PFC circuit is a three-phase three-wire PFC circuit, the driving signal is stopped being sent to one corresponding switching tube of the three-phase PFC circuit, and meanwhile, the current phases of the remaining two phases of the three-phase PFC circuit are adjusted by adjusting the duty ratios of the driving signals of the corresponding switching tubes of the remaining two phases of the three-phase PFC circuit, so that the remaining two phases of the three-phase PFC circuit work in a single-phase PFC mode.
3. The method of claim 1, wherein the operating parameters of the three-phase PFC circuit include an input current of the three-phase PFC circuit;
the first preset condition is that the input current of the three-phase PFC circuit is smaller than a first preset current threshold value.
4. The method as claimed in claim 3, wherein the first predetermined condition is that the input current of the three-phase PFC circuit is less than a first predetermined current threshold, and the duration of the input current of the three-phase PFC circuit being less than the first predetermined current threshold is longer than a first predetermined duration.
5. The method for controlling a three-phase PFC circuit according to any one of claims 1 to 4, further comprising, after the obtaining of the operating parameters of the three-phase PFC circuit:
if the working parameters of the three-phase PFC circuit meet a second preset condition and the three-phase PFC circuit is a three-phase four-wire PFC circuit, controlling two phases of the three-phase PFC circuit to stop working and simultaneously controlling the rest of the three-phase PFC circuit to continuously work;
wherein two phases of the three-phase PFC circuit are any two phases of the three-phase PFC circuit or two phases of the three-phase PFC circuit determined according to a second preset rotation sequence.
6. The method of claim 5, wherein the controlling two phases of the three-phase PFC circuit to cease operation while controlling the remaining one of the three-phase PFC circuit to continue operation comprises:
and stopping sending the driving signal to the corresponding switch tubes of two of the three-phase PFC circuit, and simultaneously continuing sending the driving signal to the corresponding switch tube of the rest of the three-phase PFC circuit.
7. The method of claim 5, wherein the operating parameters of the three-phase PFC circuit include an input current of the three-phase PFC circuit;
the second preset condition is that the input current of the three-phase PFC circuit is smaller than a second preset current threshold value.
8. The method of claim 7, wherein the second predetermined condition is that the input current of the three-phase PFC circuit is less than a second predetermined current threshold, and the duration of the input current of the three-phase PFC circuit being less than the second predetermined current threshold is longer than a second predetermined duration.
9. A terminal 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 control method of the three-phase PFC circuit according to any of the preceding claims 1 to 8 when executing the computer program.
10. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the steps of the method of controlling a three-phase PFC circuit according to any one of claims 1 to 8 above.
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| CN202111408418.2A CN114362562A (en) | 2021-11-24 | 2021-11-24 | Control method of three-phase PFC circuit, terminal and storage medium |
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