CN110994956B - Charging circuit of electrolytic capacitor, control method and control device thereof - Google Patents
Charging circuit of electrolytic capacitor, control method and control device thereof Download PDFInfo
- Publication number
- CN110994956B CN110994956B CN201911300574.XA CN201911300574A CN110994956B CN 110994956 B CN110994956 B CN 110994956B CN 201911300574 A CN201911300574 A CN 201911300574A CN 110994956 B CN110994956 B CN 110994956B
- Authority
- CN
- China
- Prior art keywords
- electrolytic capacitor
- switch
- resistor
- controlling
- closed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 262
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000001514 detection method Methods 0.000 claims description 10
- 230000007613 environmental effect Effects 0.000 abstract description 8
- 230000008569 process Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000004590 computer program Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 102100027206 CD2 antigen cytoplasmic tail-binding protein 2 Human genes 0.000 description 2
- 101000914505 Homo sapiens CD2 antigen cytoplasmic tail-binding protein 2 Proteins 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application discloses a charging circuit of an electrolytic capacitor, a control method and a control device thereof, relates to the technical field of electric appliances, and is used for solving the problem of circuit reliability caused by environmental influence in the prior art and reducing the potential safety hazard of the charging circuit of the electrolytic capacitor. The device includes: a first switch and a resistance module; the first switch is connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor; the resistance module is connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor; the second end of the electrolytic capacitor is connected with the zero line end of the alternating current power supply; the resistance module is connected with the control device, and the control device is used for detecting the ambient temperature, controlling the first switch to be switched off in the first stage and controlling the first switch to be switched on in the second stage. The embodiment of the application is applied to the control of the charging circuit of the electrolytic capacitor.
Description
Technical Field
The present disclosure relates to the field of electrical devices, and in particular, to a charging circuit for an electrolytic capacitor, a control method thereof, and a control device thereof.
Background
With the improvement of science and technology and the improvement of living standard of people, a series of temperature-controlled electric products such as air conditioners, refrigerators and the like gradually enter the lives of people and become necessary articles for life. In the outdoor unit ac input circuit, when a Micro Control Unit (MCU) of the main control circuit is powered on, the MCU controls the relay switch K1 to be closed, an electrolytic capacitor of a Power Factor Correction (PFC) circuit is charged through a Positive Temperature Coefficient (PTC) thermistor, after a period of time, the MCU of the main control circuit controls the relay switch K2 to be closed to short the PTC thermistor, the PTC thermistor is continuously charged, and finally the relay switch K1 is disconnected, thereby completing the charging process of the electrolytic capacitor.
In the control process of the existing outdoor unit alternating current input circuit, when the environmental temperature is high, the resistance value of the PTC thermistor can be increased, at the moment, once the input voltage is low, the charging time of the electrolytic capacitor can be slow, the electric quantity in the electrolytic capacitor can be very low in the period of closing the relay switch K1, when the relay switch K2 is closed, the current passing through the alternating current input circuit can be very large, therefore, the potential safety hazard is very large, and the service life of the electrolytic capacitor of the PFC circuit can be influenced. When the environmental temperature is lower, the resistance value of the PTC thermistor is very low, the relay switch K1 is closed when the power is on, and the electrolytic capacitor of the PFC circuit is charged through the PTC thermistor. Therefore, under certain circumstances, the reliability of the entire ac input circuit may be reduced, and the potential safety hazard may be increased.
Disclosure of Invention
The embodiment of the application provides a charging circuit of an electrolytic capacitor, a control method and a control device thereof, which are used for solving the problem of circuit reliability caused by environmental influence in the prior art and reducing the potential safety hazard of the charging circuit of the electrolytic capacitor.
In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:
in a first aspect, an embodiment of the present application provides a charging circuit for an electrolytic capacitor, where the electrolytic capacitor is used in a PFC circuit of an electrical device, and the charging circuit includes:
a first switch and a resistance module; the first switch is connected between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor in series; the resistance module is connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor; the second end of the electrolytic capacitor is connected with the zero line end of the alternating current power supply; the resistance module is connected with the control device, the control device is used for detecting the ambient temperature, controlling the first switch to be switched off in a first stage, and controlling the resistance value between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor in series according to the ambient temperature to charge the electrolytic capacitor; the control device is also used for controlling the first switch to be closed in the second stage; wherein the resistance value is such that the difference between the charging current of the first-stage electrolytic capacitor and the charging current of the second-stage electrolytic capacitor is less than or equal to a predetermined value.
The charging circuit of the electrolytic capacitor provided by the embodiment of the application comprises a first switch and a resistance module; the first switch is connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor; the resistance module is connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor; the second end of the electrolytic capacitor is connected with the zero line end of the alternating current power supply; the resistance module is connected with the control device, the control device is used for detecting the ambient temperature, controlling the first switch to be switched off in a first stage, and controlling the resistance value between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor in series according to the ambient temperature to charge the electrolytic capacitor; the control device is also used for controlling the first switch to be closed in the second stage; wherein the resistance value is such that the difference between the charging current of the first-stage electrolytic capacitor and the charging current of the second-stage electrolytic capacitor is less than or equal to a predetermined value. Therefore, the control device connected with the resistance module can control the resistance value of the resistance module connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor according to the environmental temperature, and realize the dynamic control of the resistance value of the resistance module connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor, so that the control device can further control the difference value between the charging current of the electrolytic capacitor in the first stage and the charging current of the electrolytic capacitor in the second stage, and the difference value is smaller than or equal to a preset value, thereby increasing the reliability of the charging circuit of the electrolytic capacitor and reducing the risk existing in the charging circuit of the electrolytic capacitor during charging.
In a second aspect, an embodiment of the present application provides a control method for a charging circuit of an electrolytic capacitor, applied to the charging circuit of the electrolytic capacitor as in the first aspect, the method including:
detecting the ambient temperature; controlling the first switch to be switched off in a first stage, and controlling the resistance value of the resistance module which is connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor according to the environmental temperature to charge the electrolytic capacitor; the first switch is controlled to close in the second phase.
In a third aspect, an embodiment of the present application provides a control device for a charging circuit of an electrolytic capacitor, applied to the charging circuit of the electrolytic capacitor as in the first aspect, including:
the detection module is used for detecting the ambient temperature; the control module is used for controlling the first switch to be switched off in a first stage, controlling the resistance value of the resistance module which is connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor according to the environment temperature detected by the detection module, and charging the electrolytic capacitor; the first switch is controlled to close in the second phase.
In a fourth aspect, an embodiment of the present application provides an electrical apparatus, including: a PFC circuit, wherein the PFC circuit includes an electrolytic capacitor; the control device further comprises a charging circuit for the electrolytic capacitor according to the first aspect and a charging circuit for the electrolytic capacitor according to the third aspect.
In a fifth aspect, an embodiment of the present application provides a control device for a charging circuit of an electrolytic capacitor, including: and a processor executing a computer to execute instructions to cause the control device of the charging circuit of the electrolytic capacitor to execute the control method of the charging circuit of the electrolytic capacitor as described in the second aspect above when the control device of the charging circuit of the electrolytic capacitor is operated.
In a sixth aspect, embodiments of the present application provide a computer-readable storage medium storing one or more programs, the one or more programs including instructions, which when executed by a computer, cause the computer to perform the method of controlling the charging circuit for an electrolytic capacitor as described in the second aspect above.
In a seventh aspect, embodiments of the present application provide a computer program product containing instructions which, when run on a computer, cause the computer to execute the method for controlling a charging circuit for an electrolytic capacitor as described in the second aspect above.
It can be understood that, the control method of the charging circuit of the electrolytic capacitor and the control device of the charging circuit of the electrolytic capacitor provided above are both used for controlling the charging circuit of the electrolytic capacitor of the first aspect, the electrical device includes the charging circuit of the electrolytic capacitor of the first aspect, the control device of the charging circuit of the electrolytic capacitor, and the PFC circuit, and the computer storage medium or the computer program product is used for executing the control method of the charging circuit of the electrolytic capacitor provided above, so that the beneficial effects that can be achieved by the control method of the charging circuit of the electrolytic capacitor of the first aspect above and the beneficial effects of the corresponding schemes in the following detailed description are referred to, and are not repeated herein.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a charging circuit of an electrolytic capacitor according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a control relationship structure of an ac input circuit according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a charging circuit for an electrolytic capacitor according to another embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a charging circuit for an electrolytic capacitor according to another embodiment of the present application;
fig. 5 is a schematic diagram of a control relationship structure of an ac input circuit according to another embodiment of the present application;
FIG. 6 is a schematic diagram of a circuit network according to an embodiment of the present application;
FIG. 7 is a flowchart illustrating a method for controlling a charging circuit of an electrolytic capacitor according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a control device of a charging circuit of an electrolytic capacitor according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The charging circuit of the electrolytic capacitor is shown in fig. 1, and includes an ac power supply 11, a charging circuit 12, and a PFC circuit (not shown). Specifically, the ac power supply 11 includes a fuse (fuse) F, a resistor VA1, a resistor VA2, a capacitor C1, a capacitor C2, a capacitor C3, and a vacuum discharge tube SA; the live wire input end LIN1 of the alternating current power supply 11 is connected with the live wire output end LOUT1 of the alternating current power supply 11 through a fuse F, a resistor VA1 is connected in series between the live wire output end LOUT1 and a zero line end NIN, a capacitor C1 is connected in series between the live wire output end LOUT1 and the zero line end NIN, a capacitor C2 is connected in series between the zero line end NIN and a ground wire end EARTH, and a capacitor C3 is connected in series between the live wire output end LOUT1 and the ground wire end EARTH; vacuum discharge tube SA has a first end connected to neutral terminal NIN via resistor VA2 and a second end connected to ground terminal EARTH. The charging circuit 12 comprises a switch K1, a switch K2, and a PTC thermistor, wherein a first end of the switch K2 is connected to a live output terminal LOUT1 of the ac power source (wherein, an input terminal of the charging circuit 12 in fig. 1 is electrically connected to the live output terminal LOUT1 of the ac power source), and a second end is connected to a first end of an electrolytic capacitor of the PFC circuit 13 (as shown in fig. 1, the switch K2 is connected to a live output terminal LOUT2 of the charging circuit 12, two ends of the electrolytic capacitor are respectively connected to the LOUT2 and a zero line output terminal NOUT2 of the charging circuit 12, wherein, the zero line output terminal NOUT2 of the charging circuit 12 is connected to the zero line output terminal NOUT1 of the ac power source 11; the first end of the switch K1 is connected to the live wire output terminal LOUT1 of the ac power supply 11, and the second end is connected to the first end of the electrolytic capacitor of the PFC circuit through the PTC thermistor. The PFC circuit comprises an electrolytic capacitor, and the second end of the electrolytic capacitor is connected with the zero line end NIN of the alternating current power supply 11. Among them, the switches K1 and K2 may adopt relay switches, as shown in fig. 1, when K1 inputs a voltage Vcc1 (where Vdd1 is a signal terminal), the first terminal and the second terminal of K1 may be controlled to be closed, similarly, when K2 inputs a voltage Vcc2 (where Vdd2 is a signal terminal), the first terminal and the second terminal of K2 may be controlled to be closed, and exemplarily, when the switches K1 and K2 are relay switches, the input voltage of Vcc1-Vcc2 is 12V. The MCU of the main control circuit in the ac input circuit controls the charging circuit of the electrolytic capacitor to charge the electrolytic capacitor of the PFC circuit by controlling the on-states of the relay switches K1 and K2, as shown in fig. 2, the ac power supply directly supplies power to the charging circuit of the electrolytic capacitor through the relay switches K1 and K2, and supplies power to the MCU of the main control circuit through the power switch. In the first stage, the MCU of the main control circuit controls the relay switch K1 to be closed, and the electrolytic capacitor of the PFC circuit is charged through the PTC thermistor; in the second stage, the MCU of the main control circuit controls the relay switch K2 to be closed, the PTC thermistor is short-circuited, the electrolytic capacitor of the PFC circuit is continuously charged, and finally the relay switch K1 is disconnected, so that the charging process of the electrolytic capacitor is completed.
The charging circuit of the electrolytic capacitor shown in fig. 1 is controlled under the control relationship of the alternating current input circuit shown in fig. 2, when the temperature is high outdoors in summer, the resistance value of the PTC thermistor is increased due to the influence of the temperature, the relay switch K1 is closed during the first stage of power-on, the electrolytic capacitor of the PFC circuit is charged through the PTC thermistor, and as the resistance value of the PTC thermistor is larger at the high temperature and the resistance value of the PTC thermistor is larger and larger after the power-on, the current of the electrolytic capacitor passing through the PFC circuit is smaller and smaller, the charging of the electrolytic capacitor is slower, and the electric quantity in the electrolytic capacitor is very low. When the second phase is reached, relay switch K2 is closed, completing the remaining charge of the electrolytic capacitor. At this time, since the PTC thermistor is short-circuited, the current of the ac input circuit is large without the limitation of the PTC thermistor, so that there is a great safety hazard and the service life of the electrolytic capacitor of the PFC circuit is also affected. Under extreme conditions, if outdoor temperature is very high, PTC thermistor's resistance is great, and when input voltage was very low, at this moment electrolytic capacitor's charge time can become slower, and the electric quantity in the electrolytic capacitor can be lower in this period of closed relay switch K1, and when closed relay switch K2, the electric current through exchanging input circuit can be bigger, and the potential safety hazard also can be higher, influences the life of components and parts, reduces the reliability of circuit. When the outdoor temperature is low in winter, the resistance of the PTC thermistor is reduced under the influence of the temperature, the relay switch K1 is closed when the PTC thermistor is electrified in the first stage, the electrolytic capacitor of the PFC circuit is charged through the PTC thermistor, and because the resistance of the PTC thermistor is low at low temperature, a large current can be generated at the moment of electrification, at the moment, the alternating current input circuit also has great potential safety hazards, and the service life of the electrolytic capacitor in the PFC circuit can be influenced by the large current. Under extreme conditions, when outdoor environment temperature is very low, the resistance of PTC thermistor is very low, and alternating current input voltage is very high, at the moment of power-on, when relay switch K1 is closed, the instantaneous current through alternating current input circuit can be very big, also can increase alternating current input circuit's potential safety hazard equally, influences the life of components and parts, reduces the reliability of circuit.
In view of the above-described problems with the ac input circuit, the present application provides a charging circuit for an electrolytic capacitor. The charging circuit of the electrolytic capacitor is applied to electrical equipment which can be an air conditioner or a refrigerator. The embodiment of the present application takes the electrical equipment as an air conditioner as an example for explanation.
Referring to fig. 3, the PFC circuit for an air conditioner using an electrolytic capacitor includes:
a first switch 31 and a resistance module 32; the first switch 31 is connected in series between the live line output terminal LOUT1 of the ac power supply (in fig. 3, the live line input terminal of the charging circuit of the electrolytic capacitor is electrically connected to the live line output terminal LOUT1 of the ac power supply) and the first terminal of the electrolytic capacitor; the resistance module 32 is connected in series between the live wire output end LOUT1 of the alternating current power supply and the first end of the electrolytic capacitor; the second end of the electrolytic capacitor is connected with a zero line end NIN of the alternating current power supply (as shown in fig. 3, two ends of the electrolytic capacitor are respectively connected with a live line output end LOUT2 of the charging circuit of the electrolytic capacitor and a zero line output end NOUT2 of the charging circuit of the electrolytic capacitor, wherein the zero line output end NOUT2 of the charging circuit of the electrolytic capacitor is connected with a zero line output end NOUT1 of the alternating current power supply); the resistance module 32 is connected to the control device. The control device is used for detecting the ambient temperature, controlling the first switch 31 to be switched off in the first stage, and controlling the resistance value of the resistance module 32 which is connected in series between the live wire output end LOUT1 of the alternating current power supply and the first end of the electrolytic capacitor according to the ambient temperature to charge the electrolytic capacitor; the control means is also used to control the first switch 31 to close in the second phase; wherein the resistance value is such that the difference between the charging current of the first-stage electrolytic capacitor and the charging current of the second-stage electrolytic capacitor is less than or equal to a predetermined value. The resistor module 32 may be a resistor network composed of resistors and switches, and the control device may control the on state of the switches to realize that the resistors form the resistor network with different resistances in different forms; for another example, the resistor module 32 may be a varistor box, and the control device may write a specific program to control the resistance of the varistor box.
The charging circuit of the electrolytic capacitor provided by the embodiment of the application comprises a first switch and a resistance module; the first switch is connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor; the resistance module is connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor; the second end of the electrolytic capacitor is connected with the zero line end of the alternating current power supply; the resistance module is connected with the control device, the control device is used for detecting the ambient temperature, controlling the first switch to be switched off in a first stage, and controlling the resistance value between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor in series according to the ambient temperature to charge the electrolytic capacitor; the control device is also used for controlling the first switch to be closed in the second stage; wherein the resistance value is such that the difference between the charging current of the first-stage electrolytic capacitor and the charging current of the second-stage electrolytic capacitor is less than or equal to a predetermined value. Therefore, the control device connected with the resistance module can control the resistance value of the resistance module connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor according to the environmental temperature, and realize the dynamic control of the resistance value of the resistance module connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor, so that the control device can further control the difference value between the charging current of the electrolytic capacitor in the first stage and the charging current of the electrolytic capacitor in the second stage, and the difference value is smaller than or equal to a preset value, thereby increasing the reliability of the charging circuit of the electrolytic capacitor and reducing the risk existing in the charging circuit of the electrolytic capacitor during charging.
The present application provides a specific form of the resistor module, and as shown in fig. 4, the resistor module 43 includes a second switch K2, a third switch K3, a fourth switch K4, a first resistor R1, and a second resistor PTC; a first end of the first resistor R1 is connected to the live line output terminal LOUT1 of the ac power supply (wherein, the input end of the charging circuit of the electrolytic capacitor in fig. 4 is electrically connected to the live line output terminal LOUT1 of the ac power supply), a second end of the first resistor R1 is connected to the first end of the electrolytic capacitor through a fourth switch K4 (as shown in fig. 4, the fourth switch K4 is connected to the live line output terminal LOUT2 of the charging circuit of the electrolytic capacitor, two ends of the electrolytic capacitor are respectively connected to the LOUT2 and the zero line output terminal NOUT2 of the charging circuit of the electrolytic capacitor, wherein the zero line output terminal NOUT2 of the charging circuit of the electrolytic capacitor is connected to the zero line output terminal NOUT1 of the ac power supply; a first end of the second switch K2 is connected to a live wire output end LOUT1 of the alternating current power supply, and a second end of the second switch K2 is connected to a first end of the electrolytic capacitor through a second resistor PTC; the first end of the third switch K3 is connected to the second end of the first resistor R1, and the second end of the third switch K3 is connected to the second end of the second switch K2. Illustratively, one or more of the first switch 42, the second switch K2, the third switch K3, and the fourth switch K4 are relay switches, and as shown in fig. 4, when the first switch 42 inputs a voltage Vcc1 (where Vdd1 is a signal terminal), the first and second ends of the first switch 42 may be controlled to be closed, similarly, when the K2 inputs a voltage Vcc2 (where Vdd2 is a signal terminal), the first and second ends of K2 may be controlled to be closed, when the K3 inputs a voltage Vcc3 (where Vdd3 is a signal terminal), the first and second ends of K3 may be controlled to be closed, when the K4 inputs a voltage Vcc4 (where Vdd4 is a signal terminal), the first and second ends of K4 may be controlled to be closed, and illustratively, when one or more of the first switch 42, the second switch K2, the third switch K3, and the fourth switch K4 is one or more of the relay switches K1-Vcc 4. Illustratively, the first resistor R1 is a power resistor, wherein the power resistor can be selected from a PTC thermistor, an NTC thermistor, a cement resistor, etc. according to specific situations; the second resistor PTC is a PTC thermistor.
Further, the charging circuit of the electrolytic capacitor further includes an ac power supply 41, and as shown in fig. 4, the ac power supply 41 includes: a fuse F1, a third resistor VA1, a fourth resistor VA2, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a vacuum discharge tube SA; the live wire input end LIN1 of the alternating current power supply 41 is connected with the live wire output end LOUT1 of the alternating current power supply 41 through a fuse F1; a live wire output end LOUT1 of the alternating current power supply 41 is connected with a zero line end NIN of the alternating current power supply 41 through a third resistor VA1, and a live wire output end LOUT1 of the alternating current power supply 41 is connected with the zero line end NIN of the alternating current power supply 41 through a first capacitor C1; a live wire output end LOUT1 of the alternating current power supply 41 is connected with a ground wire end EARTH of the alternating current power supply 41 through a third capacitor C3; the zero line end NIN of the alternating current power supply 41 is connected with the ground line end EARTH of the alternating current power supply 41 through a second capacitor C2; the first end of the vacuum discharge tube SA is connected to the neutral terminal NIN of the ac power source 41 through a fourth resistor VA2, and the second end is connected to the ground terminal EARTH of the ac power source 41. Illustratively, the third resistor VA1 and the fourth resistor VA2 are piezoresistors.
The control device controls the on state of the switch in the charging circuit of the electrolytic capacitor to charge the electrolytic capacitor of the PFC circuit, and as shown in FIG. 5, the application provides a control relationship of an AC input circuit, an AC power supply directly supplies power to a first resistor and a second resistor in the charging circuit of the electrolytic capacitor, and in a first stage, the control device controls the resistance values of the first resistor and the second resistor to charge the electrolytic capacitor by controlling the on states of the second switch, the third switch and the fourth switch; and in the second stage, the control device controls the first switch to be closed, the first resistor and the second resistor are in short circuit, and the electrolytic capacitor is continuously charged, so that the charging process of the electrolytic capacitor is completed.
Specifically, the control device is used for controlling the second switch and the fourth switch to be closed when the environment temperature is determined to be greater than the first threshold value, so that the first resistor and the second resistor are connected in parallel to charge the electrolytic capacitor. The first-stage charging of the electrolytic capacitor of the PFC circuit is performed quickly without causing a large input current. And in the second stage, the control device controls the first switch to be closed to finish the charging in the second stage, and finally the second switch and the fourth switch are switched off to finish the charging process of the electrolytic capacitor. Therefore, in the case of an excessively high outdoor temperature, the parallel connection of the first resistor and the second resistor lowers the input resistance, the electrolytic capacitor is rapidly charged in the first stage, and the remaining charge is completed when the first switch is closed. The voltage jump of the electrolytic capacitor in the charging process of the second stage caused by insufficient charging of the electrolytic capacitor in the first stage can be avoided, and the input current of the charging circuit of the electrolytic capacitor is effectively reduced. Or, the control device is used for controlling the third switch to be closed when the temperature of the environment is determined to be less than the second threshold value, so that the first resistor and the second resistor are connected in series to charge the electrolytic capacitor, for example, when the outdoor environment temperature in winter is lower, the resistance value of the second resistor is very low, the control device controls the third switch to be closed, the first resistor and the second resistor are connected in series, the resistance value of the resistor module is increased, the alternating current input resistor reaches an optimal value, the current of the electrolytic capacitor during charging in the first stage can be reduced while the charging speed is ensured, and then the first switch is closed to finish charging of the electrolytic capacitor in the second stage. Therefore, the charging circuit of the electrolytic capacitor can be effectively protected, and the reliability of the charging circuit of the electrolytic capacitor is improved. Or, the control device is configured to control the second switch to be closed and charge the electrolytic capacitor through the second resistor when it is determined that the temperature of the environment is greater than the second threshold and smaller than the first threshold, for example, when the outdoor environment temperature is within a normal range, in a first stage, the control device controls the second switch to be closed and directly charge the electrolytic capacitor through the second resistor; and in the second stage, the first switch is closed, the second resistor is short-circuited, the electrolytic capacitor is charged, and the charging of the electrolytic capacitor is completed. Or, in another alternative, the control device may be further configured to control the fourth switch to be turned on and turned off when it is determined that the temperature of the environment is greater than the second threshold and smaller than the first threshold, and charge the electrolytic capacitor through the first resistor, for example, when the outdoor environment temperature is within a normal range, in the first stage, the control device controls the fourth switch to be turned on and turned off, and charge the electrolytic capacitor directly through the first resistor; and in the second stage, the first switch is closed, the first resistor is short-circuited, the electrolytic capacitor is charged, and the charging of the electrolytic capacitor is completed. Optionally, the control device is further configured to detect a voltage value of the live wire output end and the zero line end of the ac power supply, and control the first switch to be turned off in a first stage, and control a resistance value of the resistance module, which is connected in series between the live wire output end of the ac power supply and the first end of the electrolytic capacitor, according to the ambient temperature and the voltage value of the live wire output end and the zero line end of the ac power supply, to charge the electrolytic capacitor. Specifically, the control device is specifically configured to: when the environment temperature is determined to be greater than the third threshold value and the voltage value is determined to be smaller than the rated input voltage, the second switch and the fourth switch are controlled to be switched on and off, so that the first resistor and the second resistor are connected in parallel to charge the electrolytic capacitor; or when the temperature of the environment is determined to be smaller than the fourth threshold value and the voltage value is larger than the rated input voltage, controlling the third switch to be closed, so that the first resistor and the second resistor are connected in series to charge the electrolytic capacitor; or when the temperature of the environment is determined to be greater than the fourth threshold and smaller than the third threshold and the voltage value is the rated input voltage, controlling the second switch to be closed, and charging the electrolytic capacitor through the second resistor; or, in another alternative, the control device may be further configured to control the fourth resistor to be turned on and off to charge the electrolytic capacitor through the first resistor when it is determined that the temperature of the environment is greater than the fourth threshold and less than the third threshold, and the voltage value is the rated input voltage. The rated input voltage is the rated voltage between the live wire output end and the zero line end of the alternating current power supply.
Further, the control device may be a main control circuit 61, such as an MCU, a single chip microcomputer, a field-programmable gate array (FPGA), or other logic processing circuit, where as shown in fig. 6, the present application provides a circuit network where the control device is located, including the main control circuit 61, a driving circuit 65, an ac power supply 62, a switching power supply 63, a serial port 67, an ambient temperature sensor 64, and a voltage detection circuit 66, where the switching power supply 63 is connected to the ac power supply 62, the main control circuit 61, and the driving circuit 65, and the switching power supply 63 is configured to convert an ac voltage output by the ac power supply 62 into a dc voltage and output the dc voltage to the main control circuit 61 and the driving circuit 65, so as to supply power to the main control circuit 61 and the driving circuit 65. The voltage detection circuit 66 is connected to the driving circuit 65, the voltage detection circuit 66 is directly connected to the live wire output end and the zero line end of the ac power supply 62, and the driving circuit 65 drives the voltage detection circuit 66 to detect the voltages of the live wire output end and the zero line end of the ac power supply 62, so as to generate a voltage value. The main control circuit 61 and the drive circuit 65 are connected through a serial port 67; the ambient temperature sensor 64 is connected to the main control circuit 61. The driving circuit 65 can forward the voltage value to the main control circuit 61 after acquiring the voltage value, for example, transmit the voltage value to the main control circuit 61 through the serial port 67. The main control circuit 61 can acquire the ambient temperature collected by the ambient temperature sensor 64 and the voltage value received by the serial port 67, and can control the first switch to be turned off in the first stage, control the resistance value between the live wire output end of the resistor module connected in series with the alternating current power supply 62 and the first end of the electrolytic capacitor according to the ambient temperature, and control the first switch to be turned on in the second stage, so as to realize the charging of the electrolytic capacitor of the PFC circuit. Of course, fig. 6 shows only one example, and the main control circuit 61 and the driving circuit 65 may be integrated together as a control device in one possible implementation.
The present application provides a method for controlling a charging circuit for an electrolytic capacitor based on the above charging circuit for an electrolytic capacitor, as shown in fig. 7, including:
701. and detecting the ambient temperature.
702. And in the first stage, the first switch is controlled to be switched off, and the resistance value of the resistance module which is connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor is controlled according to the environmental temperature to charge the electrolytic capacitor.
The resistance module comprises a second switch, a third switch, a fourth switch, a first resistor and a second resistor.
Specifically, when the ambient temperature is determined to be greater than the first threshold value, the second switch and the fourth switch are controlled to be switched on and off, so that the first resistor and the second resistor are connected in parallel to charge the electrolytic capacitor; or when the temperature of the environment is determined to be smaller than a second threshold value, controlling the third switch to be closed, so that the first resistor and the second resistor are connected in series to charge the electrolytic capacitor; or when the temperature of the environment is determined to be greater than the second threshold and smaller than the first threshold, controlling the second switch to be closed, and charging the electrolytic capacitor through the second resistor; or, in another alternative, when the temperature of the environment is determined to be greater than the second threshold and less than the first threshold, the fourth switch is controlled to be switched on, and the electrolytic capacitor is charged through the first resistor.
703. The first switch is controlled to close in the second phase.
Further, the method for controlling the charging circuit of the electrolytic capacitor further comprises the following steps: the voltage values of the live wire output end and the zero line end of the alternating current power supply are detected, the first switch is controlled to be switched off in a first stage, and the resistance value of the resistor module connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor is controlled according to the environment temperature and the voltage values of the live wire output end and the zero line end of the alternating current power supply to charge the electrolytic capacitor.
Specifically, when the environment temperature is determined to be greater than the third threshold value and the voltage value is determined to be less than the rated input voltage, the second switch and the fourth switch are controlled to be switched on and off, so that the first resistor and the second resistor are connected in parallel to charge the electrolytic capacitor; or when the temperature of the environment is determined to be smaller than the fourth threshold value and the voltage value is larger than the rated input voltage, controlling the third switch to be closed, so that the first resistor and the second resistor are connected in series to charge the electrolytic capacitor; or when the temperature of the environment is determined to be greater than the fourth threshold and smaller than the third threshold and the voltage value is the rated input voltage, controlling the second switch to be closed, and charging the electrolytic capacitor through the second resistor; or, in another alternative scheme, when the temperature of the environment is determined to be greater than the fourth threshold and less than the third threshold, and the voltage value is the rated input voltage, the fourth switch is controlled to be switched on, and the electrolytic capacitor is charged through the first resistor.
In the embodiment of the present invention, the control device of the charging circuit of the electrolytic capacitor may be divided into functional blocks according to the above-described embodiment of the method for controlling the charging circuit of the electrolytic capacitor, for example, each functional block may be divided according to each function, or two or more functions may be integrated into one processing block. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
The present application provides a control device for a charging circuit of an electrolytic capacitor, as shown in fig. 8, including: a detection module 81 for detecting an ambient temperature; the control module 82 is configured to control the first switch to be turned off in a first stage, and control a resistance value of the resistor module, which is connected in series between the live wire output end of the ac power supply and the first end of the electrolytic capacitor, according to the ambient temperature detected by the detection module 81, so as to charge the electrolytic capacitor; and controlling the first switch to be closed in the second stage.
Optionally, the resistance module includes a second switch, a third switch, a fourth switch, a first resistance, and a second resistance; the control module 82 is specifically configured to, when it is determined that the ambient temperature is greater than a first threshold, control the second switch and the fourth switch to be closed, so that the first resistor and the second resistor are connected in parallel, and charge the electrolytic capacitor; or, the control module 82 is specifically configured to, when it is determined that the temperature of the environment is less than the second threshold, control the third switch to be closed, so that the first resistor and the second resistor are connected in series to charge the electrolytic capacitor; or, the control module 82 is specifically configured to, when it is determined that the temperature of the environment is greater than a second threshold and smaller than a first threshold, control the second switch to be closed, and charge the electrolytic capacitor through the second resistor.
Optionally, the control module 82 is further configured to detect a voltage value of the live wire output end and the zero line end of the ac power supply, control the first switch to be turned off in a first stage, and control the resistance module to be connected in series with a resistance value between the live wire output end of the ac power supply and the first end of the electrolytic capacitor according to the ambient temperature and the voltage value of the live wire output end and the zero line end of the ac power supply, so as to charge the electrolytic capacitor.
Optionally, the resistance module includes a second switch, a third switch, a fourth switch, a first resistance, and a second resistance; the control module 82 is specifically configured to, when it is determined that the ambient temperature is greater than a third threshold and the voltage value is less than the rated input voltage, control the second switch and the fourth switch to be closed, so that the first resistor and the second resistor are connected in parallel to charge the electrolytic capacitor; or, the control module 82 is specifically configured to, when it is determined that the temperature of the environment is less than the fourth threshold and the voltage value is greater than the rated input voltage, control the third switch to be closed, so that the first resistor and the second resistor are connected in series to charge the electrolytic capacitor; or, the control module 82 is specifically configured to, when it is determined that the temperature of the environment is greater than a fourth threshold and smaller than a third threshold, and the voltage value is a rated input voltage, control the second switch to be closed, and charge the electrolytic capacitor through the second resistor.
In the case of an integrated module, the control device of the charging circuit of the electrolytic capacitor comprises: the device comprises a storage unit, a processing unit and an interface unit. The processing unit is used for controlling and managing the action of a control device of the charging circuit of the electrolytic capacitor. And the interface unit is used for the information interaction between the control device of the charging circuit of the electrolytic capacitor and other equipment. And the storage unit is used for storing program codes and data of a control device of the charging circuit of the electrolytic capacitor.
Wherein, the processing unit may be a processor, the storage unit may be a memory, and the interface unit may be a communication interface.
The control device of the charging circuit of the electrolytic capacitor comprises a processor, and the processor is used for executing application program codes so as to realize the method in the embodiment of the application.
The processor may be a general-purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more ics for controlling the execution of programs in accordance with the teachings of the present disclosure.
The control device of the charging circuit of the electrolytic capacitor may further include a memory.
The memory may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that may store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disk read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be self-contained and coupled to the processor via a bus. The memory may also be integral to the processor.
The memory is used for storing application program codes for executing the scheme of the application and is controlled by the processor to execute. The control device of the charging circuit of the electrolytic capacitor may further comprise a communication interface. The communication interface, the processor, the memory may be coupled to each other, for example, via a bus.
The communication interface is used for information interaction with other equipment, for example, the control device of the charging circuit supporting the electrolytic capacitor interacts with the information of the other equipment, for example, data is acquired from the other equipment or data is sent to the other equipment.
Further, there is also provided a calculation storage medium (or medium) including instructions which, when executed, perform the control method operations of the charging circuit of the electrolytic capacitor in the above-described embodiments. Additionally, a computer program product is also provided, comprising the above-described computing storage medium (or media).
Based on the charging circuit of the electrolytic capacitor and the control device of the charging circuit of the electrolytic capacitor, the application provides an electric appliance, which comprises a PFC circuit, wherein the PFC circuit comprises the electrolytic capacitor; the device also comprises a charging circuit of the electrolytic capacitor and a control device of the charging circuit of the electrolytic capacitor. The electrical appliance may be a refrigerator, an air conditioner, or the like.
All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and the function thereof is not described herein again.
It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A charging circuit for an electrolytic capacitor used in a PFC circuit of an electrical device, comprising:
a first switch and a resistance module;
the first switch is connected between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor in series; the resistance module is connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor; the second end of the electrolytic capacitor is connected with the zero line end of the alternating current power supply;
the resistance module is connected with a control device, wherein the control device is used for detecting the ambient temperature, controlling the first switch to be switched off in a first stage, and controlling the resistance value of the resistance module, which is connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor, according to the ambient temperature to charge the electrolytic capacitor; the control device is also used for controlling the first switch to be closed in the second stage; wherein the resistance value is such that a difference between a charging current of the electrolytic capacitor in the first stage and a charging current of the electrolytic capacitor in the second stage is less than or equal to a predetermined value.
2. The charging circuit of the electrolytic capacitor as claimed in claim 1, wherein the resistance module comprises a second switch, a third switch and a fourth switch, a first resistance and a second resistance; the first end of the first resistor is connected with the live wire output end of the alternating current power supply, and the second end of the first resistor is connected with the first end of the electrolytic capacitor through the fourth switch;
the first end of the second switch is connected with the live wire output end of the alternating current power supply, and the second end of the second switch is connected to the first end of the electrolytic capacitor through the second resistor; the first end of the third switch is connected with the second end of the first resistor, and the second end of the third switch is connected with the second end of the second switch;
the control device is specifically configured to: when the environment temperature is determined to be greater than a first threshold value, controlling the second switch and the fourth switch to be closed, so that the first resistor and the second resistor are connected in parallel to charge the electrolytic capacitor;
or,
when the temperature of the environment is determined to be smaller than a second threshold value, controlling the third switch to be closed, so that the first resistor and the second resistor are connected in series to charge the electrolytic capacitor;
or,
and when the temperature of the environment is determined to be greater than a second threshold value and smaller than a first threshold value, controlling the second switch to be closed, and charging the electrolytic capacitor through the second resistor.
3. The charging circuit of electrolytic capacitor according to claim 2,
the control device is also used for detecting the voltage values of the live wire output end and the zero line end of the alternating current power supply;
when the environment temperature is determined to be greater than a third threshold value and the voltage value is smaller than the rated input voltage, controlling the second switch and the fourth switch to be closed, so that the first resistor and the second resistor are connected in parallel, and charging the electrolytic capacitor;
or,
when the temperature of the environment is determined to be smaller than a fourth threshold value and the voltage value is larger than the rated input voltage, controlling the third switch to be closed, so that the first resistor and the second resistor are connected in series to charge the electrolytic capacitor;
or,
and when the temperature of the environment is determined to be greater than a fourth threshold value and smaller than a third threshold value, and the voltage value is the rated input voltage, controlling the second switch to be closed, and charging the electrolytic capacitor through the second resistor.
4. A method of controlling a charging circuit for an electrolytic capacitor according to any one of claims 1 to 3, comprising:
detecting the ambient temperature;
controlling the first switch to be switched off in a first stage, and controlling the resistance value of the resistance module, which is connected in series between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor, according to the ambient temperature to charge the electrolytic capacitor;
and controlling the first switch to be closed in the second stage.
5. The method for controlling the charging circuit of the electrolytic capacitor as claimed in claim 4, wherein the resistance module comprises a second switch, a third switch and a fourth switch, a first resistance and a second resistance;
according to the ambient temperature control the resistance module is connected in series with the resistance value between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor, and the electrolytic capacitor is charged with the resistance value, including:
when the environment temperature is determined to be greater than a first threshold value, controlling the second switch and the fourth switch to be closed, so that the first resistor and the second resistor are connected in parallel to charge the electrolytic capacitor;
or,
when the temperature of the environment is determined to be smaller than a second threshold value, controlling the third switch to be closed, so that the first resistor and the second resistor are connected in series to charge the electrolytic capacitor;
or,
and when the temperature of the environment is determined to be greater than a second threshold value and smaller than a first threshold value, controlling the second switch to be closed, and charging the electrolytic capacitor through the second resistor.
6. The method for controlling the charging circuit of the electrolytic capacitor according to claim 5, further comprising:
detecting voltage values of a live wire output end and a zero line end of the alternating current power supply; when the environment temperature is determined to be greater than a third threshold value and the voltage value is smaller than the rated input voltage, controlling the second switch and the fourth switch to be closed, so that the first resistor and the second resistor are connected in parallel, and charging the electrolytic capacitor;
or,
when the temperature of the environment is determined to be smaller than a fourth threshold value and the voltage value is larger than the rated input voltage, controlling the third switch to be closed, so that the first resistor and the second resistor are connected in series to charge the electrolytic capacitor;
or,
and when the temperature of the environment is determined to be greater than a fourth threshold value and smaller than a third threshold value, and the voltage value is the rated input voltage, controlling the second switch to be closed, and charging the electrolytic capacitor through the second resistor.
7. A control device for a charging circuit of an electrolytic capacitor according to any one of claims 1 to 3, comprising:
the detection module is used for detecting the ambient temperature;
the control module is used for controlling the first switch to be switched off in a first stage, controlling the resistance value of the resistance module which is connected between the live wire output end of the alternating current power supply and the first end of the electrolytic capacitor in series according to the environment temperature detected by the detection module, and charging the electrolytic capacitor; and controlling the first switch to be closed in the second stage.
8. The control device of the charging circuit of the electrolytic capacitor as claimed in claim 7, wherein the resistance module comprises a second switch, a third switch and a fourth switch, a first resistance and a second resistance;
the control module is specifically configured to, when it is determined that the ambient temperature is greater than a first threshold, control the second switch and the fourth switch to be closed, so that the first resistor and the second resistor are connected in parallel, and charge the electrolytic capacitor;
or,
the control module is specifically configured to control the third switch to be closed when it is determined that the temperature of the environment is less than a second threshold value, so that the first resistor and the second resistor are connected in series to charge the electrolytic capacitor;
or,
the control module is specifically configured to control the second switch to be closed and charge the electrolytic capacitor through the second resistor when it is determined that the temperature of the environment is greater than a second threshold and smaller than a first threshold.
9. The control device for the charging circuit of electrolytic capacitors as claimed in claim 8,
the control module is also used for detecting the voltage values of the live wire output end and the zero line end of the alternating current power supply;
the control module is further configured to control the second switch and the fourth switch to be closed when it is determined that the ambient temperature is greater than a third threshold and the voltage value is less than a rated input voltage, so that the first resistor and the second resistor are connected in parallel to charge the electrolytic capacitor;
or,
the control module is further configured to control the third switch to be closed when it is determined that the temperature of the environment is smaller than a fourth threshold and the voltage value is larger than a rated input voltage, so that the first resistor and the second resistor are connected in series to charge the electrolytic capacitor;
or,
the control module is further configured to control the second switch to be closed and charge the electrolytic capacitor through the second resistor when it is determined that the temperature of the environment is greater than a fourth threshold and less than a third threshold and the voltage value is a rated input voltage.
10. An electrical device, comprising: a PFC circuit, wherein the PFC circuit includes an electrolytic capacitor; a control device comprising a charging circuit for an electrolytic capacitor according to any one of claims 1 to 3 and a charging circuit for an electrolytic capacitor according to any one of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911300574.XA CN110994956B (en) | 2019-12-17 | 2019-12-17 | Charging circuit of electrolytic capacitor, control method and control device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911300574.XA CN110994956B (en) | 2019-12-17 | 2019-12-17 | Charging circuit of electrolytic capacitor, control method and control device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110994956A CN110994956A (en) | 2020-04-10 |
| CN110994956B true CN110994956B (en) | 2021-04-30 |
Family
ID=70094629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911300574.XA Active CN110994956B (en) | 2019-12-17 | 2019-12-17 | Charging circuit of electrolytic capacitor, control method and control device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110994956B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128993A (en) * | 2010-12-03 | 2011-07-20 | 海信（山东）空调有限公司 | Working condition verifying circuit of current-limiting resistor and verifying method thereof |
| CN102198799A (en) * | 2010-03-27 | 2011-09-28 | 三洋电机株式会社 | Power supply device for vehicle and vehicle equipped with the power supply device |
| CN106712232A (en) * | 2016-12-27 | 2017-05-24 | 池州学院 | Charging circuit with over-current protection and overvoltage protection |
| CN109936204A (en) * | 2017-12-18 | 2019-06-25 | 现代自动车株式会社 | Charging system and diagnostic application with sensor diagnostic function are in the method for its sensor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009258430A (en) * | 2008-04-17 | 2009-11-05 | Sony Corp | Discharge apparatus, method of controlling discharge apparatus, and imaging apparatus |
| JP2016073044A (en) * | 2014-09-29 | 2016-05-09 | 株式会社オートネットワーク技術研究所 | Charge/discharge control circuit |
| CN109936203A (en) * | 2017-12-18 | 2019-06-25 | 奥克斯空调股份有限公司 | A kind of air-conditioning charging circuit, charge control method and air-conditioning with the circuit |
-
2019
- 2019-12-17 CN CN201911300574.XA patent/CN110994956B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102198799A (en) * | 2010-03-27 | 2011-09-28 | 三洋电机株式会社 | Power supply device for vehicle and vehicle equipped with the power supply device |
| CN102128993A (en) * | 2010-12-03 | 2011-07-20 | 海信（山东）空调有限公司 | Working condition verifying circuit of current-limiting resistor and verifying method thereof |
| CN106712232A (en) * | 2016-12-27 | 2017-05-24 | 池州学院 | Charging circuit with over-current protection and overvoltage protection |
| CN109936204A (en) * | 2017-12-18 | 2019-06-25 | 现代自动车株式会社 | Charging system and diagnostic application with sensor diagnostic function are in the method for its sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110994956A (en) | 2020-04-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4108705B2 (en) | Power supply device and control method of power supply device | |
| CN110474420B (en) | Control method, control device and control terminal of multi-system uninterruptible power supply | |
| CN104678143A (en) | Air conditioner as well as method and device for detecting power consumption of air conditioner | |
| CN101651335B (en) | Electronic equipment protection device and electronic equipment | |
| CN108895634B (en) | Compressor control method and device | |
| CN206272217U (en) | High-low voltage protection circuit | |
| CN108488991B (en) | Air conditioner fault detection method and device, air conditioner and storage medium | |
| CN110994956B (en) | Charging circuit of electrolytic capacitor, control method and control device thereof | |
| CN108196136B (en) | Three-phase electricity detection method and device and air conditioner outdoor unit | |
| CN108458443B (en) | Air conditioner fault detection method and device, air conditioner and storage medium | |
| CN109149751A (en) | Power supply continues control circuit | |
| EP3565076A1 (en) | Protection circuit and air conditioner | |
| CN112134270B (en) | Direct current power supply system and control method thereof | |
| CN205017095U (en) | Power supply circuit of RTC circuit of air conditioner display and air conditioner control system | |
| CN103107577B (en) | Battery management circuit and terminal | |
| CN112018872B (en) | UPS control method and UPS | |
| CN110333828B (en) | EEPROM data storage method, controller and system | |
| CN208190512U (en) | Switching power supply and cooking equipment | |
| CN108054902B (en) | DC/DC converter, control method and device thereof, storage medium and processor | |
| CN105134570A (en) | Control method and system for starting fixed-frequency compressor | |
| CN107408828A (en) | Control the equipment comprising battery and associated component of the supply of electric power of the circuit of vehicle | |
| CN205336113U (en) | Voltage conversion circuit of liquid crystal display module test usefulness | |
| CN104600797A (en) | Battery management circuit and terminal | |
| CN218771403U (en) | Power supply circuit and electronic cooking equipment | |
| CN113824300B (en) | Discharging circuit for blocking bus capacitor and electrical equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |