CN113394963B - PFC circuit detection method and device and readable storage medium - Google Patents
PFC circuit detection method and device and readable storage medium Download PDFInfo
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- CN113394963B CN113394963B CN202010167114.0A CN202010167114A CN113394963B CN 113394963 B CN113394963 B CN 113394963B CN 202010167114 A CN202010167114 A CN 202010167114A CN 113394963 B CN113394963 B CN 113394963B
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- 238000001514 detection method Methods 0.000 title claims abstract description 59
- 238000004590 computer program Methods 0.000 claims description 17
- 238000003745 diagnosis Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 14
- 238000010586 diagram Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2843—In-circuit-testing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention discloses a PFC circuit detection method and device and a readable storage medium, which aim at a PFC circuit comprising at least two PFC sub-circuits, and detect a first output voltage and a first power of the PFC circuit when the at least two PFC sub-circuits are started at the same time. Comparing the first output voltage with the first threshold value, and if the first output voltage exceeds the range of the first threshold value, turning off the PFC circuit to protect the PFC circuit; if the range of the first threshold is not exceeded, the second output voltage and the second power of the PFC sub-circuit are detected in sequence to further judge whether the PFC sub-circuit in the PFC circuit fails, and if the second output voltage and the second power of a certain path of PFC sub-circuit are found to be unequal to the first output voltage and the first power in the detection process, the PFC circuit is turned off to protect the PFC circuit.
Description
Technical Field
The invention relates to the technical field of PFC (Power Factor Correction) circuits, in particular to a PFC circuit detection method and device and a readable storage medium.
Background
In the related art, the technology of the high-frequency multipath PFC circuit is more and more widely applied, and is especially applied to occasions with high load voltage requirements and high power, whether the PFC circuit can normally operate directly influences the reliable operation of a subsequent load. At present, related PFC technologies mainly comprise a hardware PFC technology and a software PFC technology, and the software PFC technology has a great design difficulty, but gradually becomes an industry development trend due to obvious cost advantages. The software PFC technology needs to ensure the integrity and accuracy of a hardware circuit, and once a part of a hardware circuit fails, the hardware circuit cannot be timely judged, so that the PFC function is invalid.
The existing software PFC technology utilizes the detection principle of hardware circuits to inject test voltage into the PFC circuits, and then judges whether the PFC circuits have faults or not according to the variation of inductance current. If the hardware circuit is a two-way PFC circuit or other multi-way PFC circuit, if one of the two-way PFC circuit or other multi-way PFC circuit fails or the reactor is not connected, the two-way PFC circuit or other multi-way PFC circuit can work theoretically. If the detection method in the prior art is used, it is very likely to show that the two-way PFC circuit or other multi-way PFC circuits are normal, but in fact, only one working corresponding power is half of the rated power, and hardware damage can be caused if the power exceeds the rated power. Therefore, the technical scheme based on the prior art cannot play a role in detecting faults when the hardware circuit is a two-way PFC circuit or a multi-way PFC circuit.
It should be noted that the information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a PFC circuit detection method and device and a readable storage medium, which are used for solving the problem that the technical scheme in the prior art cannot play a role in detecting faults when a hardware circuit is a two-way PFC circuit or a multi-way PFC circuit.
In order to solve the technical problems, the invention provides a PFC circuit detection method, wherein the PFC circuit includes at least two PFC sub-circuits, an output voltage range of the PFC circuit during normal operation is a first threshold, and the PFC circuit detection method includes the following steps:
simultaneously starting the at least two PFC sub-circuits;
detecting a first output voltage and a first power of the PFC circuit;
judging whether the first output voltage exceeds the range of the first threshold value, if so, turning off the PFC circuit;
if not, sequentially detecting a second output voltage and a second power of the PFC sub-circuit, and if the second output voltage is not equal to the first output voltage or the second power is not equal to the first power, turning off the PFC sub-circuit, wherein only one PFC sub-circuit is kept in an on state every time.
Optionally, the method further comprises the following steps:
and if the second output voltages of the at least two PFC sub-circuits are equal to the first output voltage and the second power is equal to the first power, starting the at least two PFC sub-circuits.
Optionally, if the first output voltage exceeds the range of the first threshold, it is determined that the PFC circuit fails.
Optionally, if the second output voltage is not equal to the first output voltage or the second power is not equal to the first power, determining that the PFC sub-circuit currently detected is faulty.
Optionally, the PFC circuit is further connected to a driver for driving the PFC circuit, and the simultaneously turning on the at least two PFC sub-circuits specifically includes the following steps:
judging whether the motion power of the driver is larger than the minimum power of the normal operation of the PFC circuit;
if yes, the at least two PFC sub-circuits are started at the same time.
Based on the same inventive concept, the invention also provides a PFC circuit detection device, comprising:
the starting module is configured to simultaneously start the at least two PFC sub-circuits;
a PFC circuit detection module configured to detect a first output voltage and a first power of the PFC circuit;
the judging module is configured to judge whether the first output voltage exceeds the range of the first threshold value, and if so, the PFC circuit is turned off;
the PFC sub-circuit detection module is configured to sequentially detect a second output voltage and a second power of the PFC sub-circuit, wherein only one PFC sub-circuit keeps an on state after each detection;
a turn-off module configured to turn off the PFC circuit when the first output voltage exceeds a range of the first threshold or when the second output voltage is not equal to the first output voltage or when the second power is not equal to the first power.
Optionally, the starting module is configured to start the at least two PFC sub-circuits when the second output voltages of the at least two PFC sub-circuits are both equal to the first output voltage and the second powers are both equal to the first power.
Optionally, the method further comprises:
and the fault diagnosis module is configured to judge that the PFC circuit breaks down if the first output voltage exceeds the range of the first threshold value.
Optionally, the fault diagnosis module is further configured to determine that the PFC sub-circuit currently detected is faulty if the second output voltage is not equal to the first output voltage or the second power is not equal to the first power.
Based on the same inventive concept, the present invention also proposes a readable storage medium having stored thereon a computer program which, when executed by a processor, is capable of implementing the PFC circuit detection method according to any of the above-mentioned feature descriptions.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the invention provides a PFC circuit detection method and device and a readable storage medium, which aim at a PFC circuit comprising at least two PFC sub-circuits, and detect a first output voltage and a first power of the PFC circuit when the at least two PFC sub-circuits are started at the same time. Comparing the first output voltage with the first threshold value, and if the first output voltage exceeds the range of the first threshold value, turning off the PFC circuit to protect the PFC circuit; if the range of the first threshold is not exceeded, the second output voltage and the second power of the PFC sub-circuit are detected in sequence to further judge whether the PFC sub-circuit in the PFC circuit fails, and if the second output voltage and the second power of a certain path of PFC sub-circuit are found to be unequal to the first output voltage and the first power in the detection process, the PFC circuit is turned off to protect the PFC circuit. Based on the technical scheme of the invention, the PFC circuit avoids the phenomenon of missing connection of the reactor in the production process, and can effectively judge the specific fault cause in the load test process, thereby being perfect in time. And the after-sale service time is shortened in the time of after-sale, and the working efficiency is effectively improved.
Drawings
Fig. 1 is a flowchart of a PFC circuit detection method according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a dual-path PFC circuit according to an embodiment of the present invention;
fig. 3 is a flowchart of a PFC circuit detection method according to the present invention;
fig. 4 is a schematic diagram of a PFC circuit detection device according to another embodiment of the present invention;
wherein, in fig. 2: t1-a first PFC sub-circuit, T2-a second PFC sub-circuit;
in fig. 4: the device comprises a 10-PFC circuit detection device, a 100-on module, a 101-PFC circuit detection module, a 102-judging module, a 103-PFC sub-circuit detection module and a 104-off module.
Detailed Description
Specific embodiments of the present invention will be described in more detail below with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
Referring to fig. 1, an embodiment of the present invention provides a PFC circuit detection method, wherein the PFC circuit includes at least two PFC sub-circuits, an output voltage range of the PFC circuit during normal operation is a first threshold, and the PFC circuit detection method includes the following steps:
s1: simultaneously starting the at least two PFC sub-circuits;
s2: detecting a first output voltage and a first power of the PFC circuit;
s3: judging whether the first output voltage exceeds the range of the first threshold value, if so, turning off the PFC circuit;
s4: if not, sequentially detecting a second output voltage and a second power of the PFC sub-circuit, and if the second output voltage is not equal to the first output voltage or the second power is not equal to the first power, turning off the PFC sub-circuit, wherein only one PFC sub-circuit is kept in an on state every time.
Compared with the prior art, the technical scheme provided by the embodiment of the invention aims at the PFC circuit comprising at least two PFC sub-circuits, and when the at least two PFC sub-circuits are simultaneously started, the first output voltage and the first power of the PFC circuit are detected. Comparing the first output voltage with the first threshold value, and if the first output voltage exceeds the range of the first threshold value, turning off the PFC circuit to protect the PFC circuit; if the range of the first threshold is not exceeded, the second output voltage and the second power of the PFC sub-circuit are detected in sequence to further judge whether the PFC sub-circuit in the PFC circuit fails, and if the second output voltage and the second power of a certain path of PFC sub-circuit are found to be unequal to the first output voltage and the first power in the detection process, the PFC circuit is turned off to protect the PFC circuit. Based on the technical scheme of the invention, the PFC circuit avoids the phenomenon of missing connection of the reactor in the production process, and can effectively judge the specific fault cause in the load test process, thereby being perfect in time. And the after-sale service time is shortened in the time of after-sale, and the working efficiency is effectively improved.
In the embodiment of the present invention, taking a two-way PFC circuit as an example, referring to fig. 2, a circuit diagram of the two-way PFC circuit is shown, a first PFC sub-circuit T1 and a second PFC sub-circuit T2 are turned on simultaneously, a first output voltage and a first power of the two-way PFC circuit after the PFC boost is turned on are detected, and whether the first output voltage is within a range of the first threshold is determined, where the first threshold is U 0 ，U 0 The method is obtained according to the following formula:where U is the voltage value of the ac input voltage of the PFC circuit, upfc is the boost value of the PFC circuit, and Δu is the allowable error size, which is generally ±1v. The first power is P0, P0 is obtained according to the following formula, p0=u 0 2/R+DeltaP, wherein R is the resistance value of a PFC circuit sampling resistor, deltaP is the allowable error value of power. Referring to FIG. 3, if the first output voltage exceeds U 0 And if the range of +delta U is within the range, the two-way PFC circuit is turned off, and the output is stopped to protect the two-way PFC circuit. If the first output voltage is U 0 In the range of +Δu, the second output voltages and the second power of the first PFC sub-circuit T1 and the second PFC sub-circuit T2 are further detected. Firstly, turning off a second PFC sub-circuit T2, only keeping the first PFC sub-circuit T1 in an on state, and detecting a second output voltage and a second output voltage of the first PFC sub-circuit T1And the second power is used for comparing the second output voltage with the first output voltage and comparing the second power with the first power respectively, judging whether the second output voltage and the first power are equal to each other or not, and if any one of the second output voltage and the first output voltage is not equal to each other, turning off the two-way PFC circuit and stopping outputting so as to protect the two-way PFC circuit. If the two output voltages are equal to each other, the first PFC sub-circuit T1 is closed, the second PFC sub-circuit T2 is opened, the second output voltage and the second power of the second PFC sub-circuit T2 are detected, the second output voltage is compared with the first output voltage and the second power is compared with the first power respectively, whether the two output voltages are equal to each other or not is judged, if any two output voltages are not equal to each other, the two-way PFC circuit is closed, and the output is stopped to protect the two-way PFC circuit. It should be noted that in the embodiment of the present invention, only a detection method of the two-way PFC circuit is provided, and detection methods of other multi-way PFC circuits are similar to the detection method, and are not described in detail herein. In addition, in the embodiment of the present invention, the first PFC sub-circuit T1 is detected first, and then the second PFC sub-circuit T2 is detected, and in other embodiments, the first PFC sub-circuit T1 may be detected first, and then the second PFC sub-circuit T2 may be detected, which is not limited herein. In other methods for detecting multiple PFC circuits, the first threshold and the first power may also be the same as the first threshold and the first power of the two-way PFC circuit in the embodiments of the present invention.
Optionally, the PFC circuit detection method further includes the steps of:
s5: and if the second output voltages of the at least two PFC sub-circuits are equal to the first output voltage and the second power is equal to the first power, starting the at least two PFC sub-circuits.
And when judging that the at least two PFC sub-circuits have no faults, starting all the PFC sub-circuits at the same time, and enabling the PFC circuits to work normally. Specifically, the two-way PFC circuit may be illustrated by taking the two-way PFC circuit as an example, and the first PFC sub-circuit T1 and the second PFC sub-circuit T2 may be respectively detected, and if the second output voltage is equal to the first output voltage and the second power is equal to the first power, that is, if the first PFC sub-circuit T1 and the second PFC sub-circuit T2 have no fault, the first PFC sub-circuit T1 and the second PFC sub-circuit T2 may be simultaneously turned on, and the two-way PFC circuit may normally operate. The PFC normal work is started after the hardware circuit is complete and accurate, and the product is effectively protected.
Further, if the first output voltage exceeds the range of the first threshold, the PFC circuit is judged to be faulty. If the first output voltage and the first power of the PFC circuit are detected in the step S2, and the first output voltage is found not to be within the range of the first threshold, a corresponding fault instruction can be sent to the outside in addition to the shutdown of the PFC circuit, so as to remind a technician that the PFC circuit is faulty, so that the PFC circuit can be maintained and processed in time.
Preferably, if the second output voltage is not equal to the first output voltage or the second power is not equal to the first power, then the PFC sub-circuit currently detected is judged to be faulty. If the second output voltage and the second power of the PFC sub-circuit are detected in the step S4, and the second output voltage is not equal to the first output voltage or the second power is not equal to the first power, a corresponding fault instruction can be sent to the outside in addition to the switching off of the PFC sub-circuit, so that a technician is reminded of the fault of the PFC sub-circuit currently detected, and therefore, the fault of which path is determined to be in order to maintain in time can be determined. Taking the two-way PFC circuit as an example, if the second output voltage of the first PFC sub-circuit T1 is not equal to the first output voltage or the second power is not equal to the first power, an instruction of the failure of the first PFC sub-circuit T1 is sent. And if the second output voltage of the second PFC sub-circuit T2 is not equal to the first output voltage or the second power is not equal to the first power, sending an instruction of the second PFC sub-circuit T2 fault. Please refer to fig. 3.
Further, the PFC circuit is further connected to a driver for driving the PFC circuit, and the simultaneously turning on the at least two PFC sub-circuits specifically includes the following steps:
judging whether the motion power of the driver is larger than the minimum power of the normal operation of the PFC circuit;
if yes, the at least two PFC sub-circuits are started at the same time.
Referring to fig. 4, based on the same inventive concept, an embodiment of the present invention further provides a PFC circuit detection device 10, including:
a start-up module 100 configured to simultaneously start up the at least two PFC sub-circuits;
a PFC circuit detection module 101 configured to detect a first output voltage of the PFC circuit and a first power;
a determining module 102 configured to determine whether the first output voltage exceeds the range of the first threshold, and if so, turn off the PFC circuit;
a PFC sub-circuit detection module 103 configured to sequentially detect a second output voltage and a second power of the PFC sub-circuit, wherein only one of the PFC sub-circuits remains in an on state for each detection;
a shutdown module 104 configured to shut down the PFC circuit when the first output voltage is outside the range of the first threshold or when the second output voltage is not equal to the first output voltage or when the second power is not equal to the first power.
It is understood that the turning-on module 100, the PFC circuit detection module 101, the judging module 102, the PFC sub-circuit detection module 103, and the turning-off module 104 may be combined in one device, or any one of the modules may be split into a plurality of sub-modules, or at least part of functions of one or more of the turning-on module 100, the PFC circuit detection module 101, the judging module 102, the PFC sub-circuit detection module 103, and the turning-off module 104 may be combined with at least part of functions of other modules and implemented in one functional module. According to an embodiment of the present invention, at least one of the turn-on module 100, the PFC circuit detection module 101, the decision module 102, the PFC sub-circuit detection module 103, and the turn-off module 104 may be implemented at least in part as hardware circuitry, such as a Field Programmable Gate Array (FPGA), a Programmable Logic Array (PLA), a system-on-chip, a system-on-substrate, a system-on-package, an Application Specific Integrated Circuit (ASIC), or any other reasonable way of integrating or packaging a circuit, or as hardware or firmware, or as a suitable combination of three implementations of software, hardware, and firmware. Alternatively, at least one of the turn-on module 100, the PFC circuit detection module 101, the determination module 102, the PFC sub-circuit detection module 103, and the turn-off module 104 may be at least partially implemented as a computer program module, which may perform the functions of the corresponding module when the program is run by a computer.
Optionally, the turning-on module 100 is configured to turn on the at least two PFC circuits when the second output voltages of the at least two PFC sub-circuits are both equal to the first output voltage and the second powers are both equal to the first power.
Further, the method further comprises the following steps:
and the fault diagnosis module is configured to judge that the PFC circuit breaks down if the first output voltage exceeds the range of the first threshold value.
Preferably, the fault diagnosis module is further configured to determine that the PFC sub-circuit currently detected is faulty if the second output voltage is not equal to the first output voltage or the second power is not equal to the first power.
Based on the same inventive concept, the present invention also proposes a readable storage medium having stored thereon a computer program which, when executed by a processor, is capable of implementing the PFC circuit detection method according to any of the above-mentioned feature descriptions. The readable storage medium may be a tangible device that can hold and store instructions for use by an instruction execution device, such as, but not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the preceding. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: portable computer disks, hard disks, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static Random Access Memory (SRAM), portable compact disk read-only memory (CD-ROM), digital Versatile Disks (DVD), memory sticks, floppy disks, mechanical coding devices, punch cards or in-groove structures such as punch cards or grooves having instructions stored thereon, and any suitable combination of the foregoing. The computer program described herein may be downloaded from a readable storage medium to a respective computing/processing device or to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmissions, wireless transmissions, routers, firewalls, switches, gateway computers and/or edge servers. The network interface card or network interface in each computing/processing device receives the computer program from the network and forwards the computer program for storage in a readable storage medium in the respective computing/processing device. Computer programs for carrying out operations of the present invention may be assembly instructions, instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, c++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer program may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, aspects of the present invention are implemented by personalizing electronic circuitry, such as programmable logic circuits, field Programmable Gate Arrays (FPGAs), or Programmable Logic Arrays (PLAs), with state information for a computer program, which can execute computer-readable program instructions.
Aspects of the present invention are described herein with reference to flowchart illustrations and/or block diagrams of methods, systems, and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer programs. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the programs, when executed by the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer programs may also be stored in a readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the readable storage medium storing the computer program includes an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
The computer program may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the computer program which is executed on the computer, other programmable apparatus or other devices implements the functions/acts specified in the flowchart and/or block diagram block or blocks.
In summary, according to the PFC circuit detection method and apparatus and the readable storage medium provided by the present invention, when at least two PFC sub-circuits are turned on simultaneously, a first output voltage and a first power of the PFC circuit are detected for the PFC circuit including the at least two PFC sub-circuits. Comparing the first output voltage with the first threshold value, and if the first output voltage exceeds the range of the first threshold value, turning off the PFC circuit to protect the PFC circuit; if the range of the first threshold is not exceeded, the second output voltage and the second power of the PFC sub-circuit are detected in sequence to further judge whether the PFC sub-circuit in the PFC circuit fails, and if the second output voltage and the second power of a certain path of PFC sub-circuit are found to be unequal to the first output voltage and the first power in the detection process, the PFC circuit is turned off to protect the PFC circuit. Based on the technical scheme of the invention, the PFC circuit avoids the phenomenon of missing connection of the reactor in the production process, and can effectively judge the specific fault cause in the load test process, thereby being perfect in time. And the after-sale service time is shortened in the time of after-sale, and the working efficiency is effectively improved.
In the description of the present specification, a description of the terms "one embodiment," "some embodiments," "examples," or "particular examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any person skilled in the art will make any equivalent substitution or modification to the technical solution and technical content disclosed in the invention without departing from the scope of the technical solution of the invention, and the technical solution of the invention is not departing from the scope of the invention.
Claims (10)
1. The PFC circuit detection method is characterized in that the PFC circuit comprises at least two PFC sub-circuits, the output voltage range of the PFC circuit in normal operation is a first threshold value, and the PFC circuit detection method comprises the following steps:
simultaneously starting the at least two PFC sub-circuits;
detecting a first output voltage and a first power of the PFC circuit;
judging whether the first output voltage exceeds the range of the first threshold value, if so, turning off the PFC circuit;
if not, sequentially detecting a second output voltage and a second power of the PFC sub-circuit, and if the second output voltage is not equal to the first output voltage or the second power is not equal to the first power, turning off the PFC sub-circuit, wherein only one PFC sub-circuit is kept in an on state every time.
2. The PFC circuit detection method of claim 1, further comprising the steps of:
and if the second output voltages of the at least two PFC sub-circuits are equal to the first output voltage and the second power is equal to the first power, starting the at least two PFC sub-circuits.
3. The PFC circuit detection method of claim 1 wherein if the first output voltage exceeds the first threshold, determining that the PFC circuit is malfunctioning.
4. The PFC circuit detection method according to claim 1, wherein if the second output voltage is not equal to the first output voltage or the second power is not equal to the first power, determining that the PFC sub-circuit currently detected is malfunctioning.
5. The PFC circuit detection method of claim 1 wherein the PFC circuit is further coupled to a driver for driving the PFC circuit, the simultaneously turning on the at least two PFC sub-circuits comprising:
judging whether the motion power of the driver is larger than the minimum power of the normal operation of the PFC circuit;
if yes, the at least two PFC sub-circuits are started at the same time.
6. A PFC circuit detection device, characterized by comprising:
the starting module is configured to simultaneously start at least two PFC sub-circuits;
a PFC circuit detection module configured to detect a first output voltage and a first power of the PFC circuit;
the judging module is configured to judge whether the first output voltage exceeds the range of a first threshold value, and if so, the PFC circuit is turned off;
the PFC sub-circuit detection module is configured to sequentially detect a second output voltage and a second power of the PFC sub-circuit, wherein only one PFC sub-circuit keeps an on state after each detection;
a turn-off module configured to turn off the PFC circuit when the first output voltage exceeds a range of the first threshold or when the second output voltage is not equal to the first output voltage or when the second power is not equal to the first power.
7. The PFC circuit detection device according to claim 6, wherein the turn-on module is configured to turn on the at least two PFC sub-circuits when the second output voltages of the at least two PFC sub-circuits are both equal to the first output voltage and the second power is both equal to the first power.
8. The PFC circuit detection device according to claim 6, further comprising:
and the fault diagnosis module is configured to judge that the PFC circuit breaks down if the first output voltage exceeds the range of the first threshold value.
9. The PFC circuit detection device according to claim 8, wherein the fault diagnosis module is further configured to determine that the currently detected PFC sub-circuit is faulty if the second output voltage is not equal to the first output voltage or the second power is not equal to the first power.
10. A readable storage medium having stored thereon a computer program, which when executed by a processor is capable of implementing the PFC circuit detection method according to any of claims 1 to 5.
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