CN110190740A - Fault-tolerant guard method, circuit and the air conditioner of pfc circuit - Google Patents
Fault-tolerant guard method, circuit and the air conditioner of pfc circuit Download PDFInfo
- Publication number
- CN110190740A CN110190740A CN201910544075.9A CN201910544075A CN110190740A CN 110190740 A CN110190740 A CN 110190740A CN 201910544075 A CN201910544075 A CN 201910544075A CN 110190740 A CN110190740 A CN 110190740A
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- pfc
- branch
- circuit
- pfc circuit
- fault
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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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The present invention provides fault-tolerant guard method, circuit and the air conditioner of a kind of pfc circuit, pfc circuit includes at least two PFC branches being connected in parallel, and every PFC branch is equipped with power switch tube；Fault-tolerant guard method includes the following steps: to disconnect automatically when PFC branch breaks down；The malfunction for detecting pfc circuit, the output power of the pfc circuit is reduced according to the malfunction of pfc circuit.The fault-tolerant guard method of pfc circuit provided by the invention; compared with prior art, the present invention disconnects the PFC branch to break down in time, detects the malfunction of pfc circuit in time; it reduces the output power of pfc circuit simultaneously and agrees with the fault degree of pfc circuit, so that load can also work on.Continue to break down according to original Power operation to prevent load to even result in safety hazards.Meet hommization and industrialization design, ensuring safety property improve serious forgiveness.
Description
Technical field
The invention belongs to pfc circuit technical fields, more specifically, be the fault-tolerant guard method for being related to a kind of pfc circuit,
Circuit and air conditioner.
Background technique
The full name in English of PFC be " Power Factor Correction ", mean " PFC ", power because
Number refers to relationships between effective power and total power consumption (apparent energy), that is, effective power divided by total power consumption (depending on
In power) ratio.Substantially power factor can measure the degree that electric power is used effectively, when power factor value is bigger, generation
Its electric power utilization rate of table is higher.Power factor is the parameter for measuring electrical equipment power consumption efficiency, and low power factor represents low
Electric power efficiency.PFC is known as in order to improve the technology of electrical equipment power factor.
Current some pfc circuits are Multi-channel type and interlaced distribution, after some power switch tube damage of PFC
Entire circuit causes mainboard to be unable to run extremely due to power switch tube short circuit.At this moment it can only be solved by replacement mainboard.
Pfc circuit is easy to cause pfc circuit constantly to break down to burn when encountering the above problem, and serious forgiveness is low.
Summary of the invention
It is existing to solve the purpose of the present invention is to provide fault-tolerant guard method, circuit and the air conditioner of a kind of pfc circuit
Pfc circuit present in technology constantly breaks down and burns, the low problem of serious forgiveness.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of fault-tolerant guard method of pfc circuit is provided,
The pfc circuit includes at least two PFC branches being connected in parallel, and every PFC branch is equipped with power switch tube；The appearance
Error protection method includes the following steps: to disconnect automatically when the PFC branch breaks down；Detect the failure shape of the pfc circuit
State reduces the output power of the pfc circuit according to the malfunction of the pfc circuit.
Further, when the PFC branch breaks down by with the concatenated protective tube of the power switch tube from dynamic circuit breaker
It opens.
Further, the failure that the PFC branch occurs is the power switch tube short circuit.
Further, after disconnecting failure PFC branch when PFC branch breaks down, the pfc circuit is turned off, with
Protection connects the load on the pfc circuit.
Further, it detects in the pfc circuit before the on off operating mode of each PFC branch, recloses the PFC electricity
Road.
Further, the malfunction of the detection pfc circuit includes: the logical of each PFC branch in the detection pfc circuit
Disconnected state, counts the available item number of normal PFC branch, according to the malfunction that can judge the pfc circuit with item number.
Further, the on off operating mode of each PFC branch includes: each PFC of detection in the detection pfc circuit
The electric current of branch, the PFC branch that electric current is not detected is failure PFC branch.
Further, the available item number of the normal PFC branch of statistics includes: total item of PFC branch in the pfc circuit
Number is n, and the total number of statistics failure PFC branch is m, then the available item number of normal PFC branch is (n-m) item.
Further, described its load reduction Power operation connected according to PFC failure of the current state limit includes:
The PFC control algolithm program of item number can be used by being preset with corresponding difference, obtain corresponding PFC according to the available item number counted
Control algolithm program, according to pfc circuit described in the PFC control algolithm process control, to limit the load reduction function that it is connected
Rate operation.
Another object of the present invention is to provide a kind of pfc circuits, comprising: what DSP module and at least two-way were connected in parallel
PFC branch, the PFC branch are equipped with power switch tube, and the DSP module controls the on off operating mode of the power switch tube, institute
The malfunction that DSP module detects the pfc circuit is stated, the pfc circuit is reduced according to the malfunction of the pfc circuit
Power.
Further, the PFC branch is additionally provided with switchs with the concatenated fault detection of the power switch tube, the PFC
The fault detection switch is automatic when branch failure disconnects, and the DSP module detects each PFC branch in the pfc circuit
On off operating mode and count the available item number of normal PFC branch, according to the failure shape that can judge the pfc circuit with item number
State.
Further, the fault detection switch is protective tube.
Further, the PFC branch is equipped with and the concatenated current measuring element of the power switch tube, the electric current inspection
It surveys element to connect with the DSP module, the DSP module is when electric current is not detected in the current measuring element, described in judgement
PFC branch where current measuring element breaks down.
Further, the current measuring element is sampling resistor.
Further, the DSP module is provided with control algolithm program module, and the control algolithm program module is stored with
Corresponding difference can use the PFC control algolithm program of item number.
Another object of the present invention is to provide a kind of air conditioner, including above-mentioned pfc circuit.
The beneficial effect of the fault-tolerant guard method of pfc circuit provided by the invention is: compared with prior art, the present invention
The PFC branch to break down is disconnected in time, detects the malfunction of pfc circuit in time, while reducing the output power of pfc circuit
And agree with the fault degree of pfc circuit, so that load can also work on.Continue to occur according to original Power operation to prevent load
Failure even results in safety hazards.Meet hommization and industrialization design, ensuring safety property improve serious forgiveness.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is PFC fault logic flow chart in the prior art；
Fig. 2 is the flow chart of the fault-tolerant guard method of pfc circuit provided in an embodiment of the present invention；
Fig. 3 is the pfc circuit figure of the prior art；
Fig. 4 is pfc circuit figure provided in an embodiment of the present invention, and part of module is not shown.
Wherein, each attached drawing main mark in figure:
1, power switch tube；2, protective tube；3, sampling resistor；4, inductance；5, diode；6, capacitor.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
Also referring to Fig. 1 and Fig. 2, now the fault-tolerant guard method of pfc circuit provided in an embodiment of the present invention is said
It is bright.Pfc circuit includes at least two PFC branches in parallel, and every PFC branch is equipped with power switch tube 1, the pfc circuit
Fault-tolerant guard method includes the following steps: to disconnect automatically when PFC branch breaks down；Usual PFC branch can be because power be held
It closes 1 short circuit of pipe and causes electric current excessive, so that PFC branch breaks down, therefore, disconnected automatically when PFC branch breaks down,
PFC branch to prevent not breaking down is affected persistently to break down so as to cause pfc circuit.Detect the failure of pfc circuit
State reduces the output power of pfc circuit according to the malfunction of pfc circuit, so that load can continue to work without by PFC
The influence of fault.
The fault-tolerant guard method of pfc circuit provided by the invention, compared with prior art, disconnection is broken down in time
PFC branch, detects the malfunction of pfc circuit in time, while reducing the output power of pfc circuit and agreeing with the event of pfc circuit
Barrier degree, so that load can also work on.Continue to break down according to original Power operation to prevent load to even result in safety
Sexual behavior event.Meet hommization and industrialization design, ensuring safety property improve serious forgiveness.
Further, a kind of specific embodiment party referring to Figure 2 together to Fig. 4, as pfc circuit provided by the invention
Formula realizes the automatic disconnection of PFC branch using protective tube 2, and protective tube 2 is common electric elements, and is easy to realize
The mode that circuit disconnects protects other electric elements.Certainly protective tube 2 can also be replaced using relay etc..
Preferably, please see Fig. 2 to Fig. 4, after PFC branch breaks down and disconnects, failure PFC branch is broken
It opens, and turns off pfc circuit, influenced with reaching protection load not by the disconnection of PFC branch.Safety is improved, hommization is met
And industrialization design.
Preferably, please see Fig. 2 to Fig. 4, before the on off operating mode for detecting each PFC branch, PFC electricity is reclosed
Road determines to be specifically which item or which pfc circuit disconnection are detected to facilitate.
Preferably, the malfunction for detecting pfc circuit includes: to detect the on off operating mode of each PFC branch in pfc circuit, system
The available item number for counting normal PFC branch, according to the malfunction that can judge the pfc circuit with item number.
Preferably, the on off operating mode of each PFC branch in the pfc circuit is detected specifically: if PFC branch road is not detected
To electric current, then the PFC branch breaks down, if being able to detect that electric current, PFC branch still be can work normally.Detect PFC
The on off operating mode of each PFC branch in circuit counts the available item number of PFC branch；Determine specifically break down be which or
Which PFC branch of person, and the item number of remaining PFC branch is counted, so that subsequent remaining PFC branch continues to operate normally.For
The pfc circuit subsequent output power that can continue to reduce pfc circuit to load output power to adapt to remaining available PFC,
So that load can continue to work.
Preferably, the available item number of normal PFC branch is counted specifically: the total number of PFC branch in the pfc circuit of design
For n, if the item number of statistics failure PFC branch is 1, the available item number of normal PFC branch is (n-1) item, if statistics failure PFC
The item number of branch is 2, then the available item number of normal PFC branch is (n-2) item；And so on, if the item of statistics failure PFC branch
Number is m, then the available item number of normal PFC branch is (n-m) item.
Preferably, the output power of the pfc circuit is reduced to adapt to remaining available PFC branch concrete operations are as follows: pre-
The PFC control algolithm program of item number can be used by first setting corresponding difference, and the item number of the available PFC branch counted is obtained and is corresponded to
PFC control algolithm program, pfc circuit opens remaining available PFC branch according to the PFC control algolithm program, to reach drop
The purpose of low output power.
The present invention also provides a kind of pfc circuits, please refer to Fig. 3 and 4, a kind of tool as pfc circuit provided by the invention
Body embodiment, including the PFC branch that DSP module and at least two-way are connected in parallel, PFC branch is equipped with power switch tube 1,
In, DSP module is used to control the on off operating mode of power switch tube 1, to realize the on-off of corresponding PFC branch.When PFC branch
Fault detection switch is automatic when failure disconnects, the power switch tube for the PFC branch road that subsequent DSP module control is broken down
1 disconnects；The on off operating mode of each branch is detected again, and counts the available item number of normal PFC branch；Normal PFC branch can be after
Continuous work, according to the output power that can reduce PFC circuit with item number.
Preferably as a kind of specific embodiment of pfc circuit provided by the invention, PFC is realized using protective tube 2
The automatic disconnection of branch, protective tube 2 are common electric elements, and are easy to protect other electricity in a manner of realizing that circuit disconnects
Device element.Certainly protective tube 2 can also be replaced using relay etc..
Preferably, PFC branch is equipped with current measuring element, and current measuring element and power switch tube 1 are connected, current detecting
Element is also connected with DSP module, and DSP module judges that event has occurred in the PFC branch when electric current is not detected in current measuring element
Hinder and closes the switching tube of the PFC branch road immediately to ensure that the PFC branch disconnects.
Preferably, it is that sampling resistor 3 in other embodiments, can also use other certainly that current measuring element, which is selected,
It can detecte the electric elements of electric current, such as ammeter, multimeter.
Further, DSP module is provided with algorithm routine module, and algorithm routine module is stored with corresponding different available item
Several algorithms controls program.After DSP detects the PFC branch specifically to break down and number, corresponding available PFC branch is selected
Road and its item number call corresponding control algolithm program, to achieve the purpose that reduce pfc circuit output power.
Preferably, Fig. 3 and Fig. 4 is please referred to, PFC branch further includes inductance 4, and inductance 4 and power switch tube 1, protective tube 2 are gone here and there
Connection.Inductance 4 is the common electric element in circuit, and details are not described herein.
Further, Fig. 3 and Fig. 4 is please referred to, PFC branch further includes diode 5, and for pfc circuit event occurs for diode 5
Branch, one of them branch of diode 5, power occur at the low potential for being located at inductance 4 for the recovery after barrier, PFC branch
Switching tube 1, protective tube 2, sampling resistor 3 are located in another branch.
Further, Fig. 3 and Fig. 4 is please referred to, pfc circuit further includes at least one capacitor 6, capacitor 6 and power switch tube
1 is in parallel.Capacitor 6 is the common electric element in circuit, and details are not described herein.
The present invention also provides a kind of air conditioner, the air conditioner includes above-mentioned pfc circuit.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (16)
- The fault-tolerant guard method of 1.PFC circuit, the pfc circuit includes at least two PFC branches being connected in parallel, described in every PFC branch is equipped with power switch tube；It is characterized in that,The fault-tolerant guard method includes the following steps: to disconnect automatically when the PFC branch breaks down；Detect the PFC electricity The malfunction on road reduces the output power of the pfc circuit according to the malfunction of the pfc circuit.
- 2. fault-tolerant guard method as described in claim 1, it is characterised in that: when the PFC branch breaks down by with institute The concatenated protective tube of power switch tube is stated to disconnect automatically.
- 3. fault-tolerant guard method as described in claim 1, it is characterised in that: the failure that the PFC branch occurs is the function Rate switchs tube short circuit.
- 4. fault-tolerant guard method as described in claim 1, it is characterised in that: disconnect the failure when PFC branch breaks down After PFC branch, the pfc circuit is turned off, to protect the load connected on the pfc circuit.
- 5. fault-tolerant guard method as claimed in claim 4, it is characterised in that: detect the logical of each PFC branch in the pfc circuit Before disconnected state, the pfc circuit is reclosed.
- 6. fault-tolerant guard method as described in claim 1, it is characterised in that: the malfunction of the detection pfc circuit includes: The on off operating mode for detecting each PFC branch in the pfc circuit counts the available item number of normal PFC branch, uses item according to described Number judges the malfunction of the pfc circuit.
- 7. fault-tolerant guard method as claimed in claim 6, which is characterized in that each PFC branch in the detection pfc circuit On off operating mode include: the electric current for detecting each PFC branch, be not detected electric current PFC branch be failure PFC branch.
- 8. fault-tolerant guard method as claimed in claims 6 or 7, which is characterized in that the available item of the normal PFC branch of statistics Number includes: that the total number of PFC branch in the pfc circuit is n, and the total number of statistics failure PFC branch is m, then normal PFC branch The available item number on road is (n-m) item.
- 9. fault-tolerant guard method as claimed in claim 8, which is characterized in that described according to PFC failure of the current state limit Its load reduction Power operation connected includes: to be preset with corresponding difference to use the PFC control algolithm program of item number, root The available item number gone out according to statistics obtains corresponding PFC control algolithm program, according to PFC described in the PFC control algolithm process control Circuit, to limit the load reduction Power operation that it is connected.
- 10.PFC circuit characterized by comprising the PFC branch that DSP module and at least two-way are connected in parallel, the PFC branch Equipped with power switch tube, the DSP module controls the on off operating mode of the power switch tube, and the DSP module detects the PFC The malfunction of circuit limits its load reduction Power operation connected according to the malfunction of the pfc circuit.
- 11. pfc circuit as claimed in claim 10, it is characterised in that: the PFC branch is additionally provided with and the power switch tube Concatenated fault detection switch, the PFC the branch automatic disconnection of fault detection switch, DSP module when breaking down It detects the on off operating mode of each PFC branch in the pfc circuit and counts the available item number of normal PFC branch, used according to described Item number judges the malfunction of the pfc circuit.
- 12. pfc circuit as claimed in claim 11, it is characterised in that: the fault detection switch is protective tube.
- 13. pfc circuit as claimed in claim 12, it is characterised in that: the PFC branch is equipped with and the power switch tube string The current measuring element of connection, the current measuring element are connect with the DSP module, and the DSP module is in the current detecting When electric current is not detected in element, the PFC branch where judging the current measuring element breaks down.
- 14. pfc circuit as claimed in claim 13, which is characterized in that the current measuring element is sampling resistor.
- 15. pfc circuit as claimed in claim 11, it is characterised in that: the DSP module is provided with control algolithm program mould Block, the control algolithm program module, which is stored with corresponding difference, can use the PFC control algolithm program of item number, the DSP module root The available item number gone out according to statistics obtains corresponding PFC control algolithm program, according to PFC described in the PFC control algolithm process control Circuit.
- 16. air conditioner, it is characterised in that: including the pfc circuit as described in any one of claim 10-15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910544075.9A CN110190740B (en) | 2019-06-21 | 2019-06-21 | Fault-tolerant protection method and circuit of PFC circuit and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910544075.9A CN110190740B (en) | 2019-06-21 | 2019-06-21 | Fault-tolerant protection method and circuit of PFC circuit and air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN110190740A true CN110190740A (en) | 2019-08-30 |
| CN110190740B CN110190740B (en) | 2020-11-24 |
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ID=67722792
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910544075.9A Active CN110190740B (en) | 2019-06-21 | 2019-06-21 | Fault-tolerant protection method and circuit of PFC circuit and air conditioner |
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| CN (1) | CN110190740B (en) |
Cited By (3)
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| CN112303865A (en) * | 2020-11-24 | 2021-02-02 | 珠海格力电器股份有限公司 | Air conditioner fault-tolerant circuit, air conditioning unit and control method |
| 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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| 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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| Publication number | Publication date |
|---|---|
| CN110190740B (en) | 2020-11-24 |
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