CN108089111A - Interleaved PFC fault detection method and device - Google Patents
Interleaved PFC fault detection method and device Download PDFInfo
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- CN108089111A CN108089111A CN201711084576.0A CN201711084576A CN108089111A CN 108089111 A CN108089111 A CN 108089111A CN 201711084576 A CN201711084576 A CN 201711084576A CN 108089111 A CN108089111 A CN 108089111A
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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
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Abstract
The invention discloses a kind of interleaved PFC fault detection method and device.Wherein, interleaved PFC circuit includes main phase pfc circuit and secondary phase pfc circuit, and this method includes：Obtain the current value of secondary phase pfc circuit to be detected；Judge the current value of secondary phase pfc circuit to be detected whether less than predetermined current threshold；In the case where the current value for judging secondary phase pfc circuit to be detected is less than predetermined current threshold, determine that secondary phase pfc circuit to be detected breaks down.The present invention solves and the technical issues of secondary staggered formula pfc circuit breaks down can not be effectively detected in correlation technique.
Description
Technical field
The present invention relates to circuit detection field, in particular to a kind of interleaved PFC fault detection method and dress
It puts.
Background technology
In correlation technique, interleaved PFC circuit is widely used, and is applied especially to load (such as：Transformer, motor etc.) electricity
Pressure request is high, high-power occasion, pfc circuit whether can normal operation directly affect the reliably working of successive load, alternating expression
Pfc circuit can generally include two phase control circuit of major-minor, will if main phase pfc circuit or secondary phase pfc circuit operation irregularity
The operation of other loads is influenced, and exception occurs for secondary phase pfc circuit, can cause all power that will be carried out by main phase PFC
Consumption can cause main phase PFC and be damaged because of overheat, and the use currently for interleaved PFC circuit does not carry out coherent detection
Operation, detection work are detected generally by artificial mode, by way of artificially detecting, can not examine effectively, in time
Measure the situation of pfc circuit failure.
The technical issues of for can not effectively detect secondary staggered formula pfc circuit failure in above-mentioned correlation technique,
Currently no effective solution has been proposed.
The content of the invention
An embodiment of the present invention provides a kind of interleaved PFC fault detection method and device, at least to solve correlation
The technical issues of secondary staggered formula pfc circuit breaks down can not be effectively detected in technology.
One side according to embodiments of the present invention provides a kind of interleaved PFC fault detection method, wherein,
Interleaved PFC circuit includes main phase pfc circuit and secondary phase pfc circuit, including：Obtain the electric current of secondary phase pfc circuit to be detected
Value；Judge the current value of the secondary phase pfc circuit to be detected whether less than predetermined current threshold；Judge it is described to be detected
Secondary phase pfc circuit current value less than in the case of the predetermined current threshold, determine the secondary phase pfc circuit to be detected
It breaks down.
Further, after judging whether the secondary phase pfc circuit to be detected is less than predetermined current threshold, including：
In the current value for judging the secondary phase pfc circuit to be detected not less than in the case of predetermined current threshold, treated described in acquisition
The current value of the secondary phase pfc circuit of detection is not less than the duration of the predetermined current threshold；Judging the duration is
It is no to be less than the first preset time period；If the duration is less than first preset time period, the pair to be detected is determined
Phase pfc circuit breaks down.
Further, obtaining the current value of secondary phase pfc circuit to be detected includes：Gather the secondary phase PFC to be detected
The voltage signal at preset resistance both ends in circuit；According to the voltage signal at the preset resistance both ends collected, determine to flow through
The current value of the preset resistance；Electric current of the current value as secondary phase pfc circuit to be detected of the preset resistance will be flowed through
Value.
Further, according to the voltage signal at the preset resistance both ends collected, determine to flow through the preset resistance
Current value include：It gathers and preset resistance both ends in the secondary phase pfc circuit to be detected is flowed through in the second preset time period
Multiple voltage signals, wherein, second preset time period is more than the first preset time period；Believed according to the multiple voltages collected
Number and default filter type, determine to flow through the current value of the preset resistance in second preset time period.
Further, after determining that the secondary phase pfc circuit to be detected breaks down, the method further includes：Hair
Preset alarm information is sent, wherein, the preset alarm information is used to inform that the secondary phase pfc circuit breaks down；According to described
Preset alarm information controls main phase pfc circuit and late-class circuit equipment corresponding with main phase pfc circuit to be stopped.
Another aspect according to embodiments of the present invention additionally provides a kind of interleaved PFC circuit fault detecting apparatus,
In, interleaved PFC circuit includes main phase pfc circuit and secondary phase pfc circuit, which includes：Acquiring unit, it is to be checked for obtaining
The current value of the secondary phase pfc circuit of survey；Judging unit, for whether judging the current value of the secondary phase pfc circuit to be detected
Less than predetermined current threshold；Determination unit, for judging the current value of the secondary phase pfc circuit to be detected less than described
In the case of predetermined current threshold, determine that the secondary phase pfc circuit to be detected breaks down.
Further, which further includes：Acquisition module, for whether judging the secondary phase pfc circuit to be detected
After predetermined current threshold, it is not less than predetermined current threshold in the current value for judging the secondary phase pfc circuit to be detected
In the case of value, obtain the current value of the secondary phase pfc circuit to be detected not less than the predetermined current threshold it is lasting when
It is long；Judgment module, for judging the duration whether less than the first preset time period；Determining module, if being held for described
Continuous duration determines that the secondary phase pfc circuit to be detected breaks down less than first preset time period.
Further, the acquiring unit includes：Submodule is gathered, for gathering the secondary phase pfc circuit to be detected
The voltage signal at middle preset resistance both ends；First determination sub-module, for the electricity according to the preset resistance both ends collected
Signal is pressed, determines to flow through the current value of the preset resistance；Second determination sub-module, for the electricity of the preset resistance will to be flowed through
Current value of the flow valuve as secondary phase pfc circuit to be detected.
Another aspect according to embodiments of the present invention, additionally provides a kind of storage medium, and the storage medium includes storage
Program, wherein, equipment where the storage medium is controlled when described program is run performs the friendship described in above-mentioned any one
Wrong formula pfc circuit fault detection method.
Another aspect according to embodiments of the present invention additionally provides a kind of processor, and the processor is used for operation program,
Wherein, the interleaved PFC fault detection method described in above-mentioned any one is performed when described program is run.
In embodiments of the present invention, it can realize the current value by obtaining secondary phase pfc circuit to be detected, then should
Whether current value judges the current value of secondary phase pfc circuit to be detected less than predetermined current compared with predetermined current threshold
Threshold value, and determined to be detected less than in the case of predetermined current threshold in the current value for judging secondary phase pfc circuit to be detected
Secondary phase pfc circuit break down.In this embodiment it is possible to after pfc circuit startup, secondary phase PFC electricity is detected in real time
Whether road breaks down, and compared with artificially carrying out the mode that pfc circuit carries out fault detect, can timely find pfc circuit
Failure, and then solve effectively detect the technical issues of secondary staggered formula pfc circuit breaks down in correlation technique, reach fast
Whether speed, the secondary staggered formula pfc circuit of effective detection break down, and avoid successive load and main phase pfc circuit because secondary
Phase pfc circuit failure causes the effect of operation irregularity.
Description of the drawings
Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description does not constitute improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of interleaved PFC fault detection method according to embodiments of the present invention；
Fig. 2 is a kind of schematic diagram of interleaved PFC fault detection method according to embodiments of the present invention；
Fig. 3 is the schematic diagram of another interleaved PFC fault detection method according to embodiments of the present invention；
Fig. 4 is the structure chart of interleaved PFC circuit fault detecting apparatus according to embodiments of the present invention
Specific embodiment
In order to which those skilled in the art is made to more fully understand the present invention program, below in conjunction in the embodiment of the present invention
The technical solution in the embodiment of the present invention is clearly and completely described in attached drawing, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's all other embodiments obtained without making creative work should all belong to the model that the present invention protects
It encloses.
It should be noted that term " first " in description and claims of this specification and above-mentioned attached drawing, "
Two " etc. be the object for distinguishing similar, without being used to describe specific order or precedence.It should be appreciated that it so uses
Data can exchange in the appropriate case, so as to the embodiment of the present invention described herein can with except illustrating herein or
Order beyond those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment
Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product
Or the intrinsic other steps of equipment or unit.
For the ease of user understand the present invention, the part term involved in the embodiment of the present invention and title are made below as
Lower explanation：
PFC, English full name are " Power Factor Correction ", mean " PFC ", power factor
Refer to the relation between effective power and total power consumption (apparent energy), that is, effective power divided by total power consumption (apparent
Power) ratio.Phase difference between electric current and voltage can cause to exchange the loss of power, just pfc circuit be needed to carry at this time
High Power Factor exchanges the loss of power with compensation.
EMI, electromagnetic interference, electromagnetic wave and the interference phenomenon generated after electronic component effect.
EMC, Electro Magnetic Compatibility, electromagnetic energy caused by equipment neither generates interference to miscellaneous equipment, also from other
The ability of the electromagnetic energy interference of equipment.
Ohm's law refers in same circuit, and the electric current in conductor is directly proportional with the voltage at conductor both ends, with the electricity of conductor
Resistance is inversely proportional.
According to embodiments of the present invention, a kind of embodiment of interleaved PFC fault detection method is provided, it is necessary to illustrate
, step shown in the flowchart of the accompanying drawings can hold in the computer system of such as a group of computer-executable instructions
Row, although also, show logical order in flow charts, it in some cases, can be to be different from order herein
Perform shown or described step.
Following embodiment can be applied in various interleaved PFC circuits, and main phase can be included in the interleaved PFC circuit
Pfc circuit and secondary phase pfc circuit, wherein, when circuit works, since the phase difference between electric current and voltage can cause circuit to transport
The loss of capable exchange power, power factor can be improved by the pfc circuit, so as to reduce the exchange power of circuit operation
Loss.It can include a variety of PFC in related PFC technologies, for example, passive PFC (also referred to as passive PFC) and active PFC are (also referred to as
Active PFC), wherein, passive PFC generally divides " inductance compensation formula " and " valley fill circuit formula ", and " inductance compensation formula " is to make friendship
Phase difference reduces to improve power factor between flowing the fundamental current and voltage of input.
The effect of pfc circuit in the present invention is not only to improve the power factor of circuit or system, can also solve electromagnetism
(EMI) and electromagnetic compatibility (EMC) problem of interference.
Following pfc circuits can be applied in a variety of power equipments, which can include but is not limited to：It is empty
Tune, refrigerator, washing machine, electric cooker etc., wherein, the frequency conversion equipment in power equipment can widely apply the present invention, for example, for
Convertible frequency air-conditioner can set interleaved PFC circuit, by the content in following embodiments, can directly detect interleaved PFC
Whether circuit breaks down, so as to when circuit breaks down, solve fault in time, to reduce due to pfc circuit failure
Caused by supply harmonic interference it is abnormal, electromagnetic interference.Due in correlation technique, for major-minor circuitry phase therefore
Barrier detection is all artificially to be detected afterwards, can not when pfc circuit failure occurs (as secondary phase pfc circuit breaks down)
Timely processing eventually results in whole power equipment and breaks down, for example, when secondary phase pfc circuit breaks down, compensation electricity
The function of road operation power can be transferred completely into main phase pfc circuit, when main phase pfc circuit load power factor is excessive, just
Whole pfc circuit can be caused to damage, finally due to the reduction of power back-off, power equipment operation carrying can be caused excessive, led
The damage of power equipment is caused, and artificial detection can not in time be handled when the secondary phase pfc circuit most started breaks down,
Post-processing can only be carried out when equipment breaks down, such processing mode can cause equipment damage, circuit burnout.And pass through
Following embodiments of the present invention, can finally obtain the electricity of circuit by setting current detecting equipment or voltage detection device
Situation of change is flowed, so as to detect whether circuit breaks down in real time, timely processing failure event occurs in secondary phase pfc circuit
During barrier, the operation of successive load can be stopped in time.
Can be a variety of loads that circuit operation includes for the load in example below, wherein, which can be with
Including but not limited to：Motor, aperture valve, lighting apparatus (such as street lamp), transformer.The working voltage of each load can be
Different, the voltage of load can be higher, and it is larger to run power.
With reference to preferred implementation steps, the present invention will be described, and Fig. 1 is alternating expression according to embodiments of the present invention
The flow chart of pfc circuit fault detection method, wherein, interleaved PFC circuit includes main phase pfc circuit and secondary phase pfc circuit, such as
Shown in Fig. 1, this method comprises the following steps：
Step S102 obtains the current value of secondary phase pfc circuit to be detected.
It can include major-minor phase pfc circuit in pfc circuit in the present invention, which can improve simultaneously
Power factor.Wherein, secondary phase pfc circuit can be understood as that main phase pfc circuit is aided in work.Major-minor phase pfc circuit is not only
The power factor of circuit operation can be improved, the electromagnetic interference (EMI) in circuit operational process can also be solved, reaches circuit fortune
The compatibility of row and electromagnetic wave, i.e., to electromagnetic compatibility (EMC).
After pfc circuit is started, the voltage of circuit can constantly rise, at this point it is possible to pass through default current detecting equipment
To detect the current value or voltage signal of major-minor phase pfc circuit in real time, wherein, for the secondary phase pfc circuit that detects
Current value can carry out analytical judgment use, to determine whether secondary phase pfc circuit breaks down.
In the present invention, a resistance can be set in secondary phase pfc circuit to be detected, pass through the voltage to resistance both ends
It detects to obtain the current value of secondary phase pfc circuit to be detected, alternatively, a high-precision current detector is set, with direct
Get the current value of secondary phase pfc circuit to be detected.
The current value of above-mentioned secondary phase pfc circuit, different load equipments, current value may be different, for example, at one
In equipment, current value is constantly risen by 0A to 1A.
Whether step S104 judges the current value of secondary phase pfc circuit to be detected less than predetermined current threshold.
Predetermined current threshold in the step can be pre-set according to each different load equipment or circuit
Current threshold is not specifically limited for the predetermined current threshold in the present invention, for example, predetermined current threshold is 0.6A, 1A etc..
Step S106, in the case where the current value for judging secondary phase pfc circuit to be detected is less than predetermined current threshold,
Determine that secondary phase pfc circuit to be detected breaks down.
Can be after startup power supply, detection within a predetermined period of time flows through the electric current of secondary phase pfc circuit in above-mentioned steps
The size of value, and judge current value whether less than current threshold.Predetermined amount of time can be that user is voluntarily set, for predetermined
The specific scope of period does not limit, and such as sets predetermined amount of time in 5S, 1 minute etc..After startup power supply, PFC electricity is flowed through
The phenomenon that lasting rising can be presented in the voltage on road, at this moment, it can be determined that in uphill process, if reach predetermined current threshold, with
Determine whether the pfc circuit operation of pair phase is normal.In the case of the current value got is less than predetermined current threshold, it may be determined that
The pfc circuit breaks down, it is necessary to repair secondary phase pfc circuit failure, causes main phase to avoid due to secondary phase pfc circuit failure
Pfc circuit operation power it is excessively high cause circuit damage the occurrence of.
Wherein, obtained in the current value for judging secondary phase pfc circuit to be detected not less than in the case of predetermined current threshold
The current value of secondary phase pfc circuit to be detected is taken to be not less than the duration of predetermined current threshold；Judge whether duration is low
In the first preset time period；If duration is less than the first preset time period, determine that event occurs in secondary phase pfc circuit to be detected
Barrier.
The above embodiment is to be not less than the feelings of predetermined current threshold for the current value of secondary phase pfc circuit to be detected
Condition after the current value for determining secondary phase pfc circuit to be detected is not less than predetermined current threshold, can restart to obtain and treat
The secondary phase PFC current values of detection are not less than the duration of predetermined current threshold, which can be directed to start to examine
The duration of predetermined amount of time after survey for example, after startup power supply, determines the predetermined amount of time of detection as 5s, is determining
After the current value of secondary phase pfc circuit to be detected is not less than predetermined current threshold, its duration can be detected, and with first in advance
If the period is compared, determine the current value of the secondary phase pfc circuit to be detected not less than predetermined current threshold it is lasting when
It is long whether to be less than the first preset time period, in the case where determining to be less than, it can also determine that event occurs in pfc circuit to be detected
Barrier.Wherein, the first preset time period can be that user determines according to the total duration of detection, for example, the first preset time period is
1s.For in pfc circuit boost process, if detecting, secondary phase PFC current values to be detected are not less than holding for predetermined current threshold
Continuous duration is more than the first preset time period, then can determine that the pair phase pfc circuit works normally.
By above-mentioned steps, the current value by obtaining secondary phase pfc circuit to be detected can be realized, then by the electric current
Value judges whether the current value of secondary phase pfc circuit to be detected is less than predetermined current threshold compared with predetermined current threshold,
And pair to be detected is determined less than in the case of predetermined current threshold in the current value for judging secondary phase pfc circuit to be detected
Phase pfc circuit breaks down.In this embodiment it is possible to after pfc circuit startup, detect that secondary phase pfc circuit is in real time
No failure compared with artificially carrying out the mode that pfc circuit carries out fault detect, can timely find pfc circuit failure,
And then solve effectively detect the technical issues of secondary staggered formula pfc circuit breaks down in correlation technique, reach quick, have
Whether the secondary staggered formula pfc circuit of the detection of effect breaks down, and avoids successive load and main phase pfc circuit because secondary phase PFC
Fault causes the effect of operation irregularity.
Wherein, in above-mentioned steps S102, can include：Gather preset resistance both ends in secondary phase pfc circuit to be detected
Voltage signal；According to the voltage signal at the preset resistance both ends collected, determine to flow through the current value of preset resistance；It will flow through pre-
If current value of the current value of resistance as secondary phase pfc circuit to be detected.
Can when obtaining the current value of secondary phase pfc circuit to be detected, can by determine to set preset resistance come
Determine current value.It is of course also possible to the current value of preset resistance is flowed through directly to detect by other current detectors.For
In the above embodiment, according to the voltage signal at the preset resistance both ends collected, determine to flow through the current value of preset resistance, it can
To include：It carries out being converted to electric current by the information of voltage at preset resistance both ends of the default electric current conversion regime to collecting
Value is not specifically limited in of the invention for default electric current conversion regime, for example, Ohm's law.It is converted by predetermined current
The voltage conversion at the preset resistance both ends detected is current value by mode, so that it is determined that the electric current of whole secondary phase pfc circuit
Value.
Optionally, in the voltage signal according to the preset resistance both ends collected, determine to flow through the current value of preset resistance
It can include：Gather multiple voltages that preset resistance both ends in secondary phase pfc circuit to be detected are flowed through in the second preset time period
Signal, wherein, the second preset time period is more than the first preset time period；According to the multiple voltage signals collected and default filtering
Mode determines to flow through the current value of preset resistance in the second preset time period.
Second preset time period is the detection total duration after above-mentioned electric power starting, for example, 5s.When second is default
Between can continue the voltage signal at detection preset resistance both ends in section, and after definite current value is more than predetermined current threshold, examine
It surveys whether its duration is more than the first preset time period, thus can accurately determine whether secondary phase pfc circuit occurs
Failure.
For above-mentioned default filter type, different filtered voltage signal modes can be set to different circuits, it should
Default filter type can include but is not limited to：Digital filtering mode, sliding window filtering mode, wherein, digital filtering mode can be with
It is interpreted as taking multiple voltage values of acquisition, takes and average.It, can be more by continual acquisition in the second preset time period
A voltage value, so as to average after cumulative voltage value；Can be the voltage value that quantity is preset in acquisition for sliding window filtering mode
(such as 4) keep collection voltages value quantity consistent, and the newest voltage value that collects once is being inputted average value every time
It is calculated, and deletes the voltage value most started in default quantity, to carry out mean value calculation, so as to according to default filtering
Mode handles the voltage signal collected, to obtain flowing through the current value of preset resistance.
Optionally, after determining that secondary phase pfc circuit to be detected breaks down, can also include：Send preset alarm
Information, wherein, preset alarm information is used to inform that secondary phase pfc circuit breaks down；According to preset alarm information, main phase is controlled
Pfc circuit and late-class circuit equipment corresponding with main phase pfc circuit are stopped.
Both after can breaking down determining secondary phase pfc circuit, main phase pfc circuit and late-class circuit equipment work can be stopped
Make, at this point, work about electric power personnel can overhaul secondary phase pfc circuit, to repair secondary phase pfc circuit, ensure whole electricity
Road operating status.
It explains with reference to another optional embodiment to the present invention.
Fig. 2 is a kind of schematic diagram of interleaved PFC fault detection method according to embodiments of the present invention, such as Fig. 2 institutes
Show, be that BOOST inductance boost circuits are detected in the fault detect, wherein, the resistance corresponding to U is set to carry out voltage letter
Number acquisition, to obtain the voltage sampling signal of circuit, and voltage sampling signal is sent in acquisition chip, passes through acquisition chip
Determine whether circuit boosting is normal, and it is normal in circuit boosting, determine that test passes through, and in the abnormal situation of boosting
Under, fault alarm information is sent, to allow staff's handling failure circuit in time.
This fault detection method can obtain real-time PFC current values by specific current sampling circuit, according to electricity
The situation of change of stream judges whether pfc circuit is working properly, can be accurately judged to the work shape of pfc circuit according to the method
State, so as to effectively protect successive load (explanation：Successive load can be the institutes such as motor or aperture valve, lighting apparatus, transformer
Have electrical equipment) reliably working.
Fig. 3 is the schematic diagram of another interleaved PFC fault detection method according to embodiments of the present invention, this method
It can be applied in fault detect shown in Fig. 2, as shown in figure 3, this method is including as follows：
31, secondary phase pfc circuit is started to work.
32, acquisition chip starts to gather the voltage signal at preset resistance both ends and starts detection time timing.Wherein, this hair
Total detection time in bright embodiment can be 3s, but not be limited to the time.
33, judge whether detection time reaches total detection time.
If so, step 36 is performed, if it is not, performing step 34.
34, judge whether the electric current of secondary phase pfc circuit maintains more than 1s in more than 0.6A.
If so, step 35 is performed, if it is not, performing step 36.
35, secondary phase pfc circuit is normal, works on.
36, secondary phase pfc circuit is abnormal, is stopped.
Meanwhile in the case of secondary phase pfc circuit exception, stop the work of main phase pfc circuit and the work of successive load.
Wherein, above-mentioned fault detection method needs certain secondary phase PFC current collection circuits, electric for acquisition in of the invention
Flow device or current acquisition method do not limit, and can include but is not limited to：High-precision current acquisition equipment is (as using electricity
Current transformer etc.) and high-precision high-power sampling resistor carry out current acquisition, wherein, precision resister acquisition electric current realize ratio
It is relatively simple, and cost is minimum, by gathering the voltage signal at sampling resistor both ends, can be determined by voltage signal using ohm
Rule converses the current value for flowing through resistance, this Acquisition Circuit topology and structure are unlimited, as long as electric current can be gathered effectively.Separately
Outside, after voltage signal is collected, the analog signal of acquisition can be filtered by default filtering mode, this hair
The mode of filtering involved in bright includes：Digital filtering mode and sliding window filtering mode.Wherein, common digital filtering algorithm can
To use average value filtering, that is, the voltage value in a period of time is gathered, is averaged again after summation；Sliding window can also be used to filter
Ripple is always ensured that certain sampling number, newest sampled result once is added in the calculating of average value every time, and simultaneously
The sampled result most started once is given up to fall.By presetting filtering mode, it can effectively prevent interference from causing sampling is inaccurate to ask
Topic；After ensure that sampled signal is accurate.
Optionally, above-described embodiment needs the sampling A/D chip of certain sampling precision or the sampling list with certain processing logic
Voltage analog signal rapidly can be converted to digital signal and then record and analyze the real time value of electric current, for example, in pair by member
After phase pfc circuit is opened, start timing and detect the numerical value of secondary phase current in real time, always a length of 3s during detection, when secondary mutually electricity in 3s
Stream starts timing again when being more than 0.6A, if always detected in 3s duration, electric current, which maintains more than 0.6A, can continue more than 1s
Thinking that secondary phase pfc circuit boosting is normal, complete machine can normally work on, if always detected in 3s duration, secondary phase PFC electricity
Stream can not maintain 1s in more than 0.6A, then think PFC boost circuit abnormality.
Judge secondary phase PFC boost fault, need to overhaul immediately, while suspend main phase pfc circuit and rear class is born
The work of load.
Above-mentioned fault detection method secondary phase PFC suitable for interleaved PFC technology has the topology of independent current sample, and
And high-precision current sampling circuit is needed, optimal embodiment is the sampling resistor of high-precision high-power, and cost is minimum, and
Fast response time.The chip of certain acquisition rate is needed simultaneously, for handling sampling resistor both end voltage signal and being scaled electricity
Flow valuve to determine whether secondary phase pfc circuit breaks down, in the case where secondary phase pfc circuit breaks down, can send alarm
Information, to suspend the work of main phase pfc circuit and successive load.
Optionally, in embodiments of the present invention, can above-mentioned fault detection method be handled by preinstalled circuit processing chip,
Booster circuit processing chip can be integrated with system control chip or independent control chip, can be according to reality
Border demand is adjusted, if independent control chip, then needs to establish signal contact with system control chip, when generation event
The loaded driving of system control chip pause institute can be rapidly informed during barrier, and is waited to be repaired.A certain range can be gathered
Voltage, and the voltage data after sampling can be rapidly processed and be scaled current data, recorded, while breaking down in real time
When successive load, Guarantee control system reliability can be rapidly closed.
Above-described embodiment passes through simple current sample means (explanation：Current value is continuously detected in fixed time period to be more than
Certain certain value), the fault detect of secondary circuitry phase in interleaved PFC circuit is realized, has been provided for successive load reliably working
The guarantee of effect.Successive load and main phase pfc circuit are effectively prevented because of operation irregularity caused by secondary phase pfc circuit failure
Problem.
Fig. 4 is the structure chart of interleaved PFC circuit fault detecting apparatus according to embodiments of the present invention, wherein, alternating expression
Pfc circuit includes main phase pfc circuit and secondary phase pfc circuit, as shown in figure 4, the device can include：Acquiring unit 41, is used for
Obtain the current value of secondary phase pfc circuit to be detected；Judging unit 43, for judging the electric current of secondary phase pfc circuit to be detected
Whether value is less than predetermined current threshold；Determination unit 45, for being less than in the current value for judging secondary phase pfc circuit to be detected
In the case of predetermined current threshold, determine that secondary phase pfc circuit to be detected breaks down.
In above-mentioned detection device, the current value of secondary phase pfc circuit to be detected can be obtained by acquiring unit 41, so
Afterwards by the current value compared with predetermined current threshold, the electricity of secondary phase pfc circuit to be detected is judged using judging unit 43
Whether flow valuve passes through determination unit 45 and is judging the current value of secondary phase pfc circuit to be detected less than predetermined current threshold
In the case of less than predetermined current threshold, determine that secondary phase pfc circuit to be detected breaks down.In this embodiment it is possible to
It after pfc circuit starts, detects whether secondary phase pfc circuit breaks down in real time, failure inspection is carried out with the artificial pfc circuit that carries out
The mode of survey is compared, and can timely find pfc circuit failure, and then solves effectively detect in correlation technique secondary staggered
The technical issues of formula pfc circuit breaks down, reaches whether the secondary staggered formula pfc circuit of fast and effectively detection breaks down,
Successive load and main phase pfc circuit are avoided because secondary phase pfc circuit failure causes the effect of operation irregularity.
Wherein, which further includes：Acquisition module, for judging secondary phase pfc circuit to be detected whether less than default
After current threshold, in the current value for judging secondary phase pfc circuit to be detected not less than in the case of predetermined current threshold, obtain
The current value of secondary phase pfc circuit to be detected is taken to be not less than the duration of predetermined current threshold；Judgment module, for judging to hold
Whether continuous duration is less than the first preset time period；Determining module, if determining to treat less than the first preset time period for duration
The secondary phase pfc circuit of detection breaks down.
For above-described embodiment, acquiring unit 41 includes：Submodule is gathered, for gathering secondary phase pfc circuit to be detected
The voltage signal at middle preset resistance both ends；First determination sub-module, for according to the voltage at the preset resistance both ends collected letter
Number, it determines to flow through the current value of preset resistance；Second determination sub-module, for the current value of preset resistance will to be flowed through as to be checked
The current value of the secondary phase pfc circuit of survey.
Above-mentioned interleaved PFC circuit fault detecting apparatus can also include processor and memory, above-mentioned acquiring unit
41st, judging unit 43, determination unit 45 etc. store in memory as program unit, and storage is stored in by processor execution
Above procedure unit in device realizes corresponding function.
Comprising kernel in processor, gone in memory to transfer corresponding program unit by kernel.Kernel can set one
Or more, detect whether secondary phase pfc circuit breaks down by adjusting kernel parameter, to carry out troubleshooting in time.
Memory may include computer-readable medium in volatile memory, random access memory (RAM) and/
Or the forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM), memory includes at least one deposit
Store up chip.
Another aspect according to embodiments of the present invention, additionally provides a kind of storage medium, and storage medium includes the journey of storage
Sequence, wherein, equipment where controlling storage medium when program is run performs the interleaved PFC fault inspection of above-mentioned any one
Survey method.
Another aspect according to embodiments of the present invention additionally provides a kind of processor, and processor is used for operation program,
In, program performs the interleaved PFC fault detection method of above-mentioned any one when running.
An embodiment of the present invention provides a kind of equipment, equipment includes processor, memory and storage on a memory and can
The program run on a processor, processor realize following steps when performing program：Obtain the electricity of secondary phase pfc circuit to be detected
Flow valuve；Judge the current value of secondary phase pfc circuit to be detected whether less than predetermined current threshold；Judging secondary phase to be detected
In the case that the current value of pfc circuit is less than predetermined current threshold, determine that secondary phase pfc circuit to be detected breaks down.
Optionally, when above-mentioned processor performs program, the current value of secondary phase pfc circuit to be detected can also be being judged
In the case of not less than predetermined current threshold, the current value for obtaining secondary phase pfc circuit to be detected is not less than predetermined current threshold
Duration；Judge duration whether less than the first preset time period；If duration is less than the first preset time period, really
Fixed secondary phase pfc circuit to be detected breaks down.
Optionally, when above-mentioned processor performs program, preset resistance two in secondary phase pfc circuit to be detected can also be gathered
The voltage signal at end；According to the voltage signal at the preset resistance both ends collected, determine to flow through the current value of preset resistance；It will stream
Current value of the current value through preset resistance as secondary phase pfc circuit to be detected.
Optionally, when above-mentioned processor performs program, it can also gather and pair to be detected is flowed through in the second preset time period
Multiple voltage signals at preset resistance both ends in phase pfc circuit, wherein, the second preset time period is more than the first preset time period；
According to the multiple voltage signals and default filter type collected, determine to flow through the electric current of preset resistance in the second preset time period
Value.
Optionally, when above-mentioned processor performs program, preset alarm information can also be sent, wherein, preset alarm information
For informing that secondary phase pfc circuit breaks down；According to preset alarm information, control main phase pfc circuit and with main phase pfc circuit pair
The late-class circuit equipment answered is stopped.
It is first when being performed on data processing equipment, being adapted for carrying out present invention also provides a kind of computer program product
The program of beginningization there are as below methods step：Obtain the current value of secondary phase pfc circuit to be detected；Judge secondary phase PFC to be detected
Whether the current value of circuit is less than predetermined current threshold；Judging the current value of secondary phase pfc circuit to be detected less than default
In the case of current threshold, determine that secondary phase pfc circuit to be detected breaks down.
Optionally, when above computer program product performs program, secondary phase pfc circuit to be detected can also be being judged
Current value not less than in the case of predetermined current threshold, obtaining the current value of secondary phase pfc circuit to be detected not less than default
The duration of current threshold；Judge duration whether less than the first preset time period；If duration is default less than first
Period determines that secondary phase pfc circuit to be detected breaks down.
Optionally, when above computer program product performs program, can also gather pre- in secondary phase pfc circuit to be detected
If the voltage signal at resistance both ends；According to the voltage signal at the preset resistance both ends collected, determine to flow through the electricity of preset resistance
Flow valuve；Current value of the current value as secondary phase pfc circuit to be detected of preset resistance will be flowed through.
Optionally, when above computer program product performs program, it can also gather to flow through in the second preset time period and treat
Multiple voltage signals at preset resistance both ends in the secondary phase pfc circuit of detection, wherein, it is default that the second preset time period is more than first
Period；According to the multiple voltage signals and default filter type collected, determine to flow through default electricity in the second preset time period
The current value of resistance.
Optionally, when above computer program product performs program, preset alarm information can also be sent, wherein, it presets
Warning message is used to inform that secondary phase pfc circuit breaks down；According to preset alarm information, main phase pfc circuit and and main phase are controlled
The corresponding late-class circuit equipment of pfc circuit is stopped.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
In the above embodiment of the present invention, all emphasize particularly on different fields to the description of each embodiment, do not have in some embodiment
The part of detailed description may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of the unit, Ke Yiwei
A kind of division of logic function, can there is an other dividing mode in actual implementation, for example, multiple units or component can combine or
Person is desirably integrated into another system or some features can be ignored or does not perform.Another, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
It connects, can be electrical or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
The component shown may or may not be physical location, you can be located at a place or can also be distributed to multiple
On unit.Some or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
That unit is individually physically present, can also two or more units integrate in a unit.Above-mentioned integrated list
The form that hardware had both may be employed in member is realized, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is independent production marketing or use
When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part to contribute in other words to the prior art or all or part of the technical solution can be in the form of software products
It embodies, which is stored in a storage medium, is used including some instructions so that a computer
Equipment (can be personal computer, server or network equipment etc.) perform each embodiment the method for the present invention whole or
Part steps.And foregoing storage medium includes：USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can to store program code
Medium.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of interleaved PFC fault detection method, wherein, interleaved PFC circuit includes main phase pfc circuit and secondary phase
Pfc circuit, which is characterized in that including：
Obtain the current value of secondary phase pfc circuit to be detected；
Judge the current value of the secondary phase pfc circuit to be detected whether less than predetermined current threshold；
In the current value for judging the secondary phase pfc circuit to be detected less than in the case of the predetermined current threshold, determine
The secondary phase pfc circuit to be detected breaks down.
2. according to the method described in claim 1, it is characterized in that, judging whether the secondary phase pfc circuit to be detected is low
After predetermined current threshold, including：
In the current value for judging the secondary phase pfc circuit to be detected not less than in the case of predetermined current threshold, institute is obtained
The current value for stating secondary phase pfc circuit to be detected is not less than the duration of the predetermined current threshold；
Judge the duration whether less than the first preset time period；
If the duration is less than first preset time period, determine that the secondary phase pfc circuit to be detected breaks down.
3. according to the method described in claim 1, it is characterized in that, obtaining the current value of secondary phase pfc circuit to be detected includes：
Gather the voltage signal at preset resistance both ends in the secondary phase pfc circuit to be detected；
According to the voltage signal at the preset resistance both ends collected, determine to flow through the current value of the preset resistance；
Current value of the current value as secondary phase pfc circuit to be detected of the preset resistance will be flowed through.
4. according to the method described in claim 3, it is characterized in that, believed according to the voltage at the preset resistance both ends collected
Number, the current value for determining to flow through the preset resistance includes：
Gather multiple voltages letter that preset resistance both ends in the secondary phase pfc circuit to be detected are flowed through in the second preset time period
Number, wherein, second preset time period is more than the first preset time period；
According to the multiple voltage signals and default filter type collected, determine to flow through in second preset time period described pre-
If the current value of resistance.
5. according to the method described in claim 1, it is characterized in that, determining the secondary phase pfc circuit appearance event to be detected
After barrier, the method further includes：
Preset alarm information is sent, wherein, the preset alarm information is used to inform that the secondary phase pfc circuit breaks down；
According to the preset alarm information, main phase pfc circuit and late-class circuit equipment corresponding with main phase pfc circuit is controlled to stop
Work.
6. a kind of interleaved PFC circuit fault detecting apparatus, wherein, interleaved PFC circuit includes main phase pfc circuit and secondary phase
Pfc circuit, which is characterized in that including：
Acquiring unit, for obtaining the current value of secondary phase pfc circuit to be detected；
Judging unit, for judging the current value of the secondary phase pfc circuit to be detected whether less than predetermined current threshold；
Determination unit, for being less than the predetermined current threshold in the current value for judging the secondary phase pfc circuit to be detected
In the case of, determine that the secondary phase pfc circuit to be detected breaks down.
7. device according to claim 6, which is characterized in that including：
Acquisition module, for after judging whether the secondary phase pfc circuit to be detected is less than predetermined current threshold, judging
Go out the current value of the secondary phase pfc circuit to be detected not less than in the case of predetermined current threshold, obtain described to be detected
The current value of secondary phase pfc circuit is not less than the duration of the predetermined current threshold；
Judgment module, for judging the duration whether less than the first preset time period；
Determining module, if determining the secondary phase PFC to be detected less than first preset time period for the duration
Circuit breaks down.
8. device according to claim 6, which is characterized in that the acquiring unit includes：
Submodule is gathered, for gathering the voltage signal at preset resistance both ends in the secondary phase pfc circuit to be detected；
First determination sub-module for the voltage signal according to the preset resistance both ends collected, determines to flow through described pre-
If the current value of resistance；
Second determination sub-module, for electricity of the current value of the preset resistance as secondary phase pfc circuit to be detected will to be flowed through
Flow valuve.
9. a kind of storage medium, which is characterized in that the storage medium includes the program of storage, wherein, it is run in described program
When control the storage medium where interleaved PFC fault inspection in equipment perform claim requirement 1 to 5 described in any one
Survey method.
10. a kind of processor, which is characterized in that the processor is used for operation program, wherein, right of execution when described program is run
Profit requires the interleaved PFC fault detection method described in any one in 1 to 5.
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| CN201711084576.0A CN108089111A (en) | 2017-11-06 | 2017-11-06 | Interleaved PFC fault detection method and device |
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| CN111023403A (en) * | 2019-10-21 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | PFC control method and air conditioner |
| CN111337815A (en) * | 2018-12-19 | 2020-06-26 | 比亚迪股份有限公司 | Electric automobile, vehicle-mounted charger and fault detection method and device thereof |
| CN111404373A (en) * | 2020-03-25 | 2020-07-10 | 广州华凌制冷设备有限公司 | Voltage doubling circuit, fault detection method, air conditioner and readable storage medium |
| CN112688551A (en) * | 2020-12-02 | 2021-04-20 | 青岛海尔空调电子有限公司 | Interleaved PFC circuit failure control method, system and device |
| CN112688550A (en) * | 2020-11-20 | 2021-04-20 | 青岛海尔空调电子有限公司 | Method, system and device for judging failure of interleaved PFC circuit |
| CN113394963A (en) * | 2020-03-11 | 2021-09-14 | 上海海立（集团）股份有限公司 | PFC circuit detection method and device and readable storage medium |
| CN114362498A (en) * | 2021-11-24 | 2022-04-15 | 漳州科华技术有限责任公司 | Control method and device of three-phase PFC circuit, control equipment and storage medium |
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| CN112688550A (en) * | 2020-11-20 | 2021-04-20 | 青岛海尔空调电子有限公司 | Method, system and device for judging failure of interleaved PFC circuit |
| CN112688551A (en) * | 2020-12-02 | 2021-04-20 | 青岛海尔空调电子有限公司 | Interleaved PFC circuit failure control method, system and device |
| CN112688551B (en) * | 2020-12-02 | 2023-11-24 | 青岛海尔空调电子有限公司 | Interleaved PFC circuit failure control method, system and device |
| CN114362498A (en) * | 2021-11-24 | 2022-04-15 | 漳州科华技术有限责任公司 | Control method and device of three-phase PFC circuit, control equipment and storage medium |
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Application publication date: 20180529 |