CN109861519A - Power circuit and air conditioner - Google Patents
Power circuit and air conditioner Download PDFInfo
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- CN109861519A CN109861519A CN201910065203.1A CN201910065203A CN109861519A CN 109861519 A CN109861519 A CN 109861519A CN 201910065203 A CN201910065203 A CN 201910065203A CN 109861519 A CN109861519 A CN 109861519A
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- mould group
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- power supply
- power circuit
- voltage
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- 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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Abstract
The present invention provides a kind of power circuit and air conditioners, wherein power circuit includes: voltage detecting mould group, and for detecting ac signal with the corresponding power supply parameter information of determination, the input terminal of voltage detecting mould group is connected to the input terminal side of rectification mould group；Mould group is controlled, is adjusted for receiving power supply parameter information, and according to operating parameter of the power supply parameter information to PFC mould group, control mould group is connected to the output end of voltage detecting mould group and the control terminal of PFC mould group.According to the technical solution of the present invention, on the one hand, improve the reliability and accuracy of acquisition power supply parameter information, and then improve the reliability of PFC mould group, on the other hand, the Voltage Drop that ac signal occurs, another further aspect can be detected much sooner, simplify interference of the rectification mould group to PFC mould group, thereby reduce power circuit layout and in terms of complexity.
Description
Technical field
The present invention relates to power circuit technical fields, in particular to a kind of power circuit and a kind of air conditioner.
Background technique
For household appliance powerful for air conditioner, washer and refrigerator etc., the reliable sexual intercourse of power circuit
To motor (such as blower and compressor) maintainability, therefore, it is necessary to monitor the alternating current of load condition and input in real time
Signal, in particular for the distortion of ac signal, ripple signal, surging signal, short circuit, open circuit, stall and load-side power down
Situations such as, to reduce electrical hidden danger and failure rate.
In the related technology, rectification mould group, the PFC (Power of electrical connection are usually set gradually in a power
Factor Correction, PFC) mould group, electrolytic capacitor mould group and inverter bridge mould group, wherein in rectification mould group
Sample detecting mould group is set between PFC mould group, and to monitor ac signal, still, above-mentioned detection mode at least exists following
Technological deficiency:
(1) in the sampling electric signal of rectification mould group rear class acquisition, need to determine the phase of ac signal by estimating,
PFC mould group determines the zero-acrross ing moment of ac signal according to calculated value, still, due between calculated value and actual value not there is only
Time delay, and there are calculating errors, can seriously affect the reliability and accuracy of PFC mould group.
(2) when ac signal powers off suddenly, since there are time delays for rectification mould group, therefore, it is impossible to detect electricity
Pressure moment is fallen, namely cannot achieve the real-time guard to motor.
(3) in the connection line between rectifier bridge mould group and PFC mould group, it usually needs the capacitor that low capacity is added (holds
Value ranges preferably from 200nF~2uF) filtering is to reduce ripple current, still, if loading to be lightly loaded, and the value of above-mentioned capacitor
Bigger, then PFC mould group is bigger according to the voltage wave shape distortion of sampled signal adjustment output.
Summary of the invention
The present invention is directed at least solve one of above-mentioned technical problems existing in the prior art or related technologies.
For this purpose, an object of the present invention is to provide a kind of power circuits.
It is another object of the present invention to propose a kind of air conditioner.
To achieve the above object, according to the embodiment of the first aspect of the invention, a kind of power circuit is proposed, comprising:
Voltage detecting mould group, for detecting the ac signal with the corresponding power supply parameter information of determination, the voltage detecting mould group
Input terminal be connected to it is described rectification mould group input terminal side；Mould group is controlled, for receiving the power supply parameter information, and root
It is adjusted according to operating parameter of the power supply parameter information to the PFC mould group, the control mould group is connected to
The control terminal of the output end of the voltage detecting mould group and the PFC mould group, wherein the power supply parameter information
It comprises at least one of the following: when the corresponding voltage magnitude of the ac signal, voltage-phase, electric voltage frequency and voltage zero-cross
It carves.
Power circuit according to an embodiment of the present invention, by the input terminal one that voltage detecting mould is mounted on to rectification mould group
Side at least realizes the following technical effect being expected:
(1) the obtained power supply parameter information of detection there's almost no time delay, also reduce calculated value and estimated value it
Between deviation, be conducive to promoted PFC mould group reliability and accuracy.
(2) it is able to detect that the Voltage Drop of ac signal, and then realizes the real-time guard to load (such as motor).
(3) it does not need that small capacitances are arranged between rectifier bridge mould group and PFC mould group, not only reduces circuit cost and debugging
Complexity, moreover, reducing the wave distortion of PFC mould group output voltage adjusted.
In the related technology, during carrying out rectification processing to ac signal due to rectification mould group, rectification mould group is intrinsic
Turn-on time and conduction voltage drop, result in the wave distortion of sampled signal, therefore, the corresponding power supply parameter information of sampled signal
It is also inaccuracy, which results in the wave distortions of PFC output voltage adjusted.
Specifically, the application rectifies the input terminal side of mould group, voltage detecting mould group by the way that voltage detecting mould to be mounted on
The power supply parameter information acquired before rectification is handled feeds back to control mould group, controls mould group to adjust the operating parameter of PFC, in turn
The reliability of output to the power supply signal loaded can effectively be promoted.
Wherein, control mould group includes processor, controller, logical operation device and embedded device etc., but not limited to this.
Power circuit according to the above embodiment of the present invention, it is preferable that the voltage detecting mould group specifically includes: amplifier mould
Group for detecting the ac signal with the corresponding power supply parameter information of determination, and the power supply parameter information is transmitted to
The first input end of the control mould group, wherein the ac signal accesses to the rectification mould group, institute by network system
The input terminal for stating amplifier mould group is connected to the network system, and the processing result of the amplifier mould group corresponds to the power supply parameter
Information.
Power circuit according to an embodiment of the present invention has by the way that voltage detecting mould group is arranged including amplifier mould group, wherein
Amplifier mould group generally includes the multistage direct-coupled circuit of high voltage gain, high input resistance and low output resistance, at least wraps
Two input ports are included to detect the corresponding difference sampled signal of ac signal, amplifier mould group continue to difference sampled signal into
After row amplification, output to control mould group, for the switching frequency of control mould group adjustment PFC mould group, on the one hand, be based on power supply parameter
Voltage magnitude in information carries out voltage control (being mainly applied to boost phase) and is on the other hand based on power supply parameter information
In the voltage zero-cross moment PFC duty ratio exported is adjusted, and then realize calibration to power factor.
Power circuit according to the above embodiment of the present invention, it is preferable that the voltage detecting mould group is specific further include: sampling
Resistive mode group, for detecting the ac signal with the corresponding power supply parameter information of determination, and by the power supply parameter information
It is transmitted to the control mould group, wherein the sampling resistor mould group is connected to the input terminal of the rectification mould group, samples the friendship
The corresponding electric current of galvanic electricity signal, and corresponding voltage input is converted to the control mould group.
Power circuit according to an embodiment of the present invention specifically further includes sampling resistor mould by setting voltage detecting mould group
Group after sampling resistor accesses ac signal, converts electrical current into branch pressure voltage to get electric to the corresponding sampling of ac signal
Pressure, since sampling resistor mould group there's almost no time delay, almost without phase between sampled voltage and ac signal
Difference, therefore, PFC mould group are based on sampled voltage and carry out voltage control (being mainly applied to boost phase) and cross the accurate of zero adjustment
Property and reliability are higher, and the cost of sampling resistor mould group is lower compared with for amplifier mould group, and advantageously reduces power circuit tune
The difficulty and complexity of examination.
Power circuit according to the above embodiment of the present invention, it is preferable that further include: electrolytic capacitor mould group, for filtering out
Ac signal is stated to the noise signal occurred during load supplying, the electrolytic capacitor mould group also provides for the load
Starting voltage, wherein the electrolytic capacitor mould group is connected to the input terminal of the PFC mould group and the load
Between, the ac signal is converted to half-wave electric signal through the rectification mould group, the half-wave electric signal through the power because
After number straightening die group processing, continues on through the electrolytic capacitor mould group and export to the load.
Power circuit according to an embodiment of the present invention, by the way that electrolytic capacitor mould group is arranged, on the one hand, can be filled when powering on
Electricity is to provide the starting voltage of load, and on the other hand, electrolytic capacitor mould group can be effectively reduced to be carried in ac signal
Ripple signal, to reduce interference of the ripple signal to load, in another aspect, electrolytic capacitor mould group can when loading unexpected power down
The surging signal that absorbing load side occurs, to reduce interference and impact to power circuit.
Power circuit according to the above embodiment of the present invention, it is preferable that the PFC mould group specifically includes: electricity
Inductor component for the half-wave electric signal of the rectification mould group output to be converted to DC signal, and is also used to being input to
The electric signal of the electrolytic capacitor mould group carries out boosting processing or decompression processing；Switching device, for controlling the inductance component
Carry out the boosting processing or decompression processing；One way conducting device, for treated that electric signal is unidirectional by the inductance component
It is conducted to the electrolytic capacitor mould group, wherein the inductance component and the one way conducting device are sequentially connected in series in the rectification
In high-tension line between mould group and the electrolytic capacitor mould group, it is equipped between the inductance component and the one way conducting device
One common end, the switching device are series between the common end and low-voltage circuit, the switch device conductive, described unidirectional
Conduction device cut-off, the electric signal that the inductance component storage flows through, i.e., to the electric signal for being input to the electrolytic capacitor mould group
Carry out decompression processing, the switching device cut-off, the one way conducting device conducting, the telecommunications of the inductance component release storage
Number, i.e., boosting processing is carried out to the electric signal for being input to the electrolytic capacitor mould group.
Power circuit according to an embodiment of the present invention, by including in the manner described above in setting PFC mould group
Inductance component, switching device and the one way conducting device being attached, the turn-on frequency of switching device be by control mould group according to
What power supply parameter information determined, and acquisition is detected before rectifying mould group just because of the power supply parameter information of the application, almost
Non-time delay and phase difference, it is therefore, higher to the reliability and accuracy of the conducting control of switching device, namely comprehensive promotion
The reliability and accuracy of PFC mould group can control especially when Voltage Drop occurs in ac signal
Switching device acts immediately, to promote the reliability and timeliness that carry out power down protection to load.
Power circuit according to the above embodiment of the present invention, it is preferable that the driving end of the switching device is the power
The control terminal of factor correcting group, the turn-on frequency of the switching device are the switching frequency of the PFC mould group,
Wherein, the switching frequency of the PFC mould group is configured as being adjusted according to the power supply parameter information.
The switching frequency of power circuit according to an embodiment of the present invention, PFC mould group is configured as according to
Power supply parameter information is adjusted, and for example, overvoltage protection is carried out according to the voltage magnitude of detection, according to voltage-phase and voltage
Zero-acrross ing moment come control PFC mould group output duty ratio.
Power circuit according to the above embodiment of the present invention, it is preferable that the switching device comprises at least one of the following: absolutely
Edge fence gate gated transistors, MOS transistor and triode.
Power circuit according to an embodiment of the present invention, the control terminal of insulated gate gate transistors are grid, metal oxide
The control terminal of transistor is grid, and the control terminal of triode is base stage.
Power circuit according to the above embodiment of the present invention, it is preferable that further include: current limiting device is series at the electrolysis
In the low-voltage circuit of the input terminal side of electric capacity module, for carrying out current limliting processing to the electric signal for flowing through the low-voltage circuit.
By including current limiting device in setting power circuit, and limit is arranged in power circuit according to an embodiment of the present invention
Stream device carries out current limliting processing, the line that can be effectively reduced in power circuit bus to the electric signal for flowing through the low-voltage circuit
It is interfered caused by wave electric current and surging signal.
Power circuit according to the above embodiment of the present invention, it is preferable that further include: inverter bridge mould group is connected to the electricity
The output end side for solving electric capacity module, for being converted to the electric signal of the output of electrolytic capacitor mould group with designated phase difference
Power supply signal, and it is input to the load.
Power circuit according to an embodiment of the present invention is connected to the electrolytic capacitor mould group by the way that inverter bridge mould group is arranged
Output end side, and the electric signal of the output of electrolytic capacitor mould group is converted into the power supply signal with designated phase difference, and
It is input to the load, with the reliability of effectively proof load, for example, and for threephase load, the output of inverter bridge mould group
Power supply signal phase difference be 120 °.
Embodiment according to the second aspect of the invention, it is also proposed that a kind of air conditioner, comprising: such as any of the above-described technology
Scheme limits power circuit；Motor, the output end of the power circuit is connected to as load, and the power circuit is used for institute
It states ac signal and is converted to power supply signal, the power supply signal is configured as that the motor is driven to operate.
Air conditioner according to an embodiment of the present invention has whole technical effects of above-mentioned power circuit, and details are not described herein.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 shows the schematic block diagram of power circuit according to an embodiment of the invention；
Fig. 2 shows the topological schematic diagrames of power circuit according to another embodiment of the invention；
Fig. 3 shows the topological schematic diagram of power circuit according to another embodiment of the invention；
Fig. 4 shows the topological schematic diagram of power circuit according to another embodiment of the invention；
Fig. 5 shows the schematic block diagram of air conditioner according to an embodiment of the invention.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
It is specifically described below with reference to power circuit of the Fig. 1 to Fig. 4 to embodiment according to the present invention.
Fig. 2 shows the topological schematic diagrames of power circuit according to another embodiment of the invention.
Fig. 3 shows the topological schematic diagram of power circuit according to another embodiment of the invention.
Fig. 4 shows the topological schematic diagram of power circuit according to another embodiment of the invention.
Fig. 1 shows the schematic diagram of the power circuit of embodiment according to the present invention.
As shown in Figure 1, the power circuit 100 of embodiment according to the present invention, comprising: voltage detecting mould group, for detecting
The ac signal AC is connected to described whole with the corresponding power supply parameter information of determination, the input terminal of the voltage detecting mould group
Flow the input terminal side of mould group；Mould group is controlled, for receiving the power supply parameter information, and according to the power supply parameter information pair
The operating parameter of the PFC mould group is adjusted, and the control mould group is connected to the defeated of the voltage detecting mould group
The control terminal of outlet and the PFC mould group, wherein the power supply parameter information comprises at least one of the following: described
The corresponding voltage magnitude of ac signal AC, voltage-phase, electric voltage frequency and voltage zero-cross moment.
Power circuit 100 according to an embodiment of the present invention, by the input terminal that voltage detecting mould is mounted on to rectification mould group
Side at least realizes the following technical effect being expected:
(1) the obtained power supply parameter information of detection there's almost no time delay, also reduce calculated value and estimated value it
Between deviation, be conducive to promoted PFC mould group reliability and accuracy.
(2) it is able to detect that the Voltage Drop of ac signal AC, and then realizes the real-time guard to load (such as motor).
(3) it does not need that small capacitances are arranged between rectifier bridge mould group and PFC mould group, not only reduces circuit cost and debugging
Complexity, moreover, reducing the wave distortion of PFC mould group output voltage adjusted.
In the related technology, during carrying out rectification processing to ac signal AC due to rectification mould group, rectification mould group is solid
Some turn-on times and conduction voltage drop result in the wave distortion of sampled signal, therefore, the corresponding power supply parameter letter of sampled signal
Breath is also inaccuracy, and which results in the wave distortions of PFC output voltage adjusted.
Specifically, the application rectifies the input terminal side of mould group, voltage detecting mould group by the way that voltage detecting mould to be mounted on
The power supply parameter information acquired before rectification is handled feeds back to control mould group, controls mould group to adjust the operating parameter of PFC, in turn
The reliability of output to the power supply signal loaded can effectively be promoted.
Wherein, control mould group includes processor, controller, logical operation device and embedded device etc., but not limited to this.
Power circuit 100 according to the above embodiment of the present invention, it is preferable that the voltage detecting mould group specifically includes: fortune
Mould group is put, for detecting the ac signal AC with the corresponding power supply parameter information of determination, and by the power supply parameter information
It is transmitted to the first input end of the control mould group, wherein the ac signal AC is connect by high-tension line and low-voltage circuit
Enter to the rectification mould group, the input terminal of the amplifier mould group is connected to the network system, the processing knot of the amplifier mould group
Fruit corresponds to the power supply parameter information.
Power circuit 100 according to an embodiment of the present invention has by the way that voltage detecting mould group is arranged including amplifier mould group,
In, amplifier mould group generally includes the multistage direct-coupled circuit of high voltage gain, high input resistance and low output resistance, at least
Including two input ports to detect the corresponding difference sampled signal of ac signal AC, amplifier mould group, which continues to sample difference, to be believed
After number amplifying, output to control mould group, for the switching frequency of control mould group adjustment PFC mould group, on the one hand, based on power supply
Voltage magnitude in parameter information carries out voltage control (being mainly applied to boost phase) and is on the other hand based on power supply parameter
The PFC duty ratio exported is adjusted in the voltage zero-cross moment in information, and then realizes the calibration to power factor.
Wherein, network system carries ac signal by setting high-tension line and low-voltage circuit.
Power circuit 100 according to the above embodiment of the present invention, it is preferable that the voltage detecting mould group is specific further include:
Sampling resistor mould group is joined for detecting the ac signal AC with the corresponding power supply parameter information of determination, and by the power supply
Number information is transmitted to the control mould group, wherein the sampling resistor mould group is connected to the input terminal of the rectification mould group, sampling
The corresponding electric current of the ac signal AC, and corresponding voltage input is converted to the control mould group.
Power circuit 100 according to an embodiment of the present invention specifically further includes sampling resistor by setting voltage detecting mould group
Mould group after sampling resistor accesses ac signal AC, converts electrical current into branch pressure voltage to get corresponding to ac signal AC
Sampled voltage, since sampling resistor mould group there's almost no time delay, several between sampled voltage and ac signal AC
Without phase difference, therefore, PFC mould group is based on sampled voltage and carries out voltage control (being mainly applied to boost phase) and cross acyclic homologically trioial
The accuracy and reliability of section is higher, and the cost of sampling resistor mould group is lower compared with for amplifier mould group, and advantageously reduces electricity
The difficulty and complexity that source circuit 100 is debugged.
Power circuit 100 according to the above embodiment of the present invention, it is preferable that further include: electrolytic capacitor mould group C, for filtering
Except the ac signal AC is to the noise signal occurred during load supplying, the electrolytic capacitor mould group C is also provided for
The starting voltage of the load, wherein the electrolytic capacitor mould group C is connected to the PFC mould group and the load
Input terminal between, the ac signal AC is converted to half-wave electric signal through the rectification mould group, the half-wave electric signal warp
After the PFC mould group processing, continues on through the electrolytic capacitor mould group C and export to the load.
Power circuit 100 according to an embodiment of the present invention, by the way that electrolytic capacitor mould group C is arranged, on the one hand, can power on
When charging to provide the starting voltage of load, on the other hand, electrolytic capacitor mould group C can be effectively reduced in ac signal AC
The ripple signal of carrying, to reduce interference of the ripple signal to load, in another aspect, when loading unexpected power down, electrolytic capacitor mould
Group C is capable of the surging signal of absorbing load side appearance, to reduce interference and impact to power circuit 100.
Power circuit 100 according to the above embodiment of the present invention, it is preferable that the PFC mould group is specifically wrapped
Include: inductance component L for the half-wave electric signal of the rectification mould group output to be converted to DC signal, and is also used to pair
The electric signal for being input to the electrolytic capacitor mould group C carries out boosting processing or decompression processing；Switching device, for controlling the electricity
Inductor component L carries out the boosting processing or decompression processing；One way conducting device D, for by the inductance component L treated electricity
Signal one-way conduction is to the electrolytic capacitor mould group C, wherein the inductance component L and the one way conducting device D are sequentially connected in series
In high-tension line between the rectification mould group and the electrolytic capacitor mould group C, the inductance component L and the one-way conduction
A common end is equipped between device D, the switching device is series between the common end and low-voltage circuit, the switching device
Conducting, the one way conducting device D cut-off, the electric signal that the inductance component L storage flows through are that is, electric to the electrolysis is input to
The electric signal of molar group C carries out decompression processing, the switching device cut-off, the one way conducting device D conducting, the inductor
The electric signal of part L release storage, i.e., carry out boosting processing to the electric signal for being input to the electrolytic capacitor mould group C.
Power circuit 100 according to an embodiment of the present invention, by including according to above-mentioned in setting PFC mould group
Inductance component L, switching device and the one way conducting device D that mode is attached, the turn-on frequency of switching device are by control mould
Group is determined according to power supply parameter information, and is detected and obtained before rectifying mould group just because of the power supply parameter information of the application
, almost non-time delay and phase difference, therefore, higher to the reliability and accuracy of the conducting control of switching device, namely
Synthesis improves the reliability and accuracy of PFC mould group, especially Voltage Drop occurs in ac signal AC
When, can control switch device act immediately, with promoted to load carry out power down protection reliability and timeliness.
Power circuit 100 according to the above embodiment of the present invention, it is preferable that the driving end of the switching device is the function
The control terminal of rate factor correcting group, the turn-on frequency of the switching device are the switch frequency of the PFC mould group
Rate, wherein the switching frequency of the PFC mould group is configured as being adjusted according to the power supply parameter information.
The switching frequency of power circuit 100 according to an embodiment of the present invention, PFC mould group is configured as basis
The power supply parameter information is adjusted, and for example, carries out overvoltage protection according to the voltage magnitude of detection, according to voltage-phase and
The voltage zero-cross moment controls the duty ratio of PFC mould group output.
Power circuit 100 according to the above embodiment of the present invention, it is preferable that the switching device includes following at least one
Kind: insulated gate gate transistors, MOS transistor and triode.
Power circuit 100 according to an embodiment of the present invention, the control terminal of insulated gate gate transistors are grid, metal oxidation
The control terminal of object transistor is grid, and the control terminal of triode is base stage.
Power circuit 100 according to the above embodiment of the present invention, it is preferable that further include: current limiting device R is series at described
In the low-voltage circuit of the input terminal side of electrolytic capacitor mould group C, for carrying out current limliting to the electric signal for flowing through the low-voltage circuit
Processing.
Power circuit 100 according to an embodiment of the present invention, by including current limiting device R in setting power circuit 100, and
Current limiting device R is set, current limliting processing is carried out to the electric signal for flowing through the low-voltage circuit, power circuit 100 can be effectively reduced
It is interfered caused by ripple current and surging signal in bus.
Power circuit 100 according to the above embodiment of the present invention, it is preferable that further include: inverter bridge mould group is connected to described
The output end side of electrolytic capacitor mould group C, for being converted to the electric signal of the output of electrolytic capacitor mould group C with designated phase
The power supply signal of difference, and it is input to the load.
Power circuit 100 according to an embodiment of the present invention is connected to the electrolytic capacitor mould by the way that inverter bridge mould group is arranged
The output end side of group C, and the electric signal of the output of electrolytic capacitor mould group C is converted to designated phase difference for telecommunications
Number, and it is input to the load, with the reliability of effectively proof load, for example, for threephase load, inverter bridge mould group
The phase difference of the power supply signal of output is 120 °.
Fig. 5 shows the schematic block diagram of air conditioner according to an embodiment of the invention.
As shown in figure 5, air conditioner 300 according to an embodiment of the invention, comprising: such as any of the above-described technical solution
Limit power circuit 100；Motor 200 is connected to the output end of the power circuit 100, the power circuit 100 as load
For the ac signal to be converted to power supply signal, the power supply signal is configured as that the motor 200 is driven to operate.
Air conditioner according to an embodiment of the present invention has whole technical effects of above-mentioned power circuit, and details are not described herein.
The technical scheme of the present invention has been explained in detail above with reference to the attached drawings, it is contemplated that in the related technology the technical issues of, this
Invention proposes a kind of power circuit and air conditioner, by the way that voltage detecting mould to be mounted on to the input terminal side of rectification mould group, until
Realize the following technical effect being expected less: (1) the power supply parameter information that detection obtains there's almost no time delay,
The deviation between calculated value and estimated value is reduced, the reliability and accuracy that promote PFC mould group are conducive to；(2) it is able to detect
To the Voltage Drop of ac signal, and then realize the real-time guard to load (such as motor)；(3) it does not need in rectifier bridge mould group
Small capacitances are set between PFC mould group, not only reduce the complexity of circuit cost and debugging, moreover, reducing PFC mould group tune
The wave distortion of output voltage after whole.
Step in the method for the present invention can be sequentially adjusted, combined, and deleted according to actual needs.
Unit in apparatus of the present invention can be combined, divided, and deleted according to actual needs.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium include read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory,
RAM), programmable read only memory (Programmable Read-only Memory, PROM), erasable programmable is read-only deposits
Reservoir (Erasable Programmable Read Only Memory, EPROM), disposable programmable read-only memory (One-
Time Programmable Read-Only Memory, OTPROM), the electronics formula of erasing can make carbon copies read-only memory
(Electrically-Erasable Programmable Read-Only Memory, EEPROM), CD-ROM (Compact
Disc Read-Only Memory, CD-ROM) or other disc memories, magnetic disk storage, magnetic tape storage or can
For carrying or any other computer-readable medium of storing data.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of power circuit, the power circuit is equipped with the rectification mould group and PFC mould group of electrical connection, described whole
Stream mould group is configured as carrying out rectification processing to ac signal, which is characterized in that the power circuit includes:
Voltage detecting mould group, for detecting the ac signal with the corresponding power supply parameter information of determination, the voltage detecting
The input terminal of mould group is connected to the input terminal side of the rectification mould group；
Mould group is controlled, for receiving the power supply parameter information, and according to the power supply parameter information to the power factor school
The operating parameter of holotype group is adjusted, and the control mould group is connected to the output end and the power of the voltage detecting mould group
The control terminal of factor correcting group,
Wherein, the power supply parameter information comprises at least one of the following: the corresponding voltage magnitude of the ac signal, voltage phase
Position, electric voltage frequency and voltage zero-cross moment.
2. power circuit according to claim 1, which is characterized in that the voltage detecting mould group specifically includes:
Amplifier mould group, for detecting the ac signal with the corresponding power supply parameter information of determination, and by the power supply parameter
Information is transmitted to the first input end of the control mould group,
Wherein, the ac signal accesses to the rectification mould group by network system, and the input terminal of the amplifier mould group connects
It is connected to the network system, the processing result of the amplifier mould group corresponds to the power supply parameter information.
3. power circuit according to claim 1, which is characterized in that the voltage detecting mould group is specific further include:
Sampling resistor mould group, for detecting the ac signal with the corresponding power supply parameter information of determination, and by the power supply
Parameter information is transmitted to the control mould group,
Wherein, the sampling resistor mould group is connected to the input terminal of the rectification mould group, and it is corresponding to sample the ac signal
Electric current, and corresponding voltage input is converted to the control mould group.
4. power circuit according to any one of claim 1 to 3, which is characterized in that further include:
Electrolytic capacitor mould group, for filtering out the ac signal to the noise signal occurred during load supplying, the electricity
Solution electric capacity module also provides for the starting voltage of the load,
Wherein, the electrolytic capacitor mould group is connected between the PFC mould group and the input terminal of the load, institute
It states ac signal and is converted to half-wave electric signal through the rectification mould group, the half-wave electric signal is through the PFC mould
After group processing, continues on through the electrolytic capacitor mould group and export to the load.
5. power circuit according to claim 4, which is characterized in that the PFC mould group specifically includes:
Inductance component for the half-wave electric signal of the rectification mould group output to be converted to DC signal, and is also used to pair
The electric signal for being input to the electrolytic capacitor mould group carries out boosting processing or decompression processing；
Switching device carries out the boosting processing or decompression processing for controlling the inductance component；
One way conducting device, for by the inductance component treated electric signal one-way conduction to the electrolytic capacitor mould group,
Wherein, the inductance component and the one way conducting device are sequentially connected in series in the rectification mould group and the electrolytic capacitor mould
In high-tension line between group, a common end, the derailing switch are equipped between the inductance component and the one way conducting device
Part is series between the common end and low-voltage circuit, the switch device conductive, the one way conducting device cut-off, the electricity
The electric signal that inductor component storage flows through carries out decompression processing to the electric signal for being input to the electrolytic capacitor mould group, described to open
Close device cut-off, one way conducting device conducting, the electric signal of the inductance component release storage, i.e., to being input to the electricity
The electric signal of solution electric capacity module carries out boosting processing.
6. power circuit according to claim 5, which is characterized in that
The driving end of the switching device is the control terminal of the PFC mould group, the turn-on frequency of the switching device
For the switching frequency of the PFC mould group,
Wherein, the switching frequency of the PFC mould group is configured as being adjusted according to the power supply parameter information.
7. power circuit according to claim 5 or 6, which is characterized in that
The switching device comprises at least one of the following: insulated gate gate transistors, MOS transistor and triode.
8. power circuit according to claim 4, which is characterized in that further include:
Current limiting device is series in the low-voltage circuit of the input terminal side of the electrolytic capacitor mould group, for described low to flowing through
The electric signal on crimping road carries out current limliting processing.
9. power circuit according to claim 4, which is characterized in that further include:
Inverter bridge mould group is connected to the output end side of the electrolytic capacitor mould group, for by the output of electrolytic capacitor mould group
Electric signal is converted to the power supply signal with designated phase difference, and is input to the load.
10. a kind of air conditioner characterized by comprising
Power circuit as claimed in any one of claims 1-9 wherein；
Motor, the output end of the power circuit is connected to as load, and the power circuit is used for the ac signal
Power supply signal is converted to, the power supply signal is configured as that the motor is driven to operate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910065203.1A CN109861519A (en) | 2019-01-23 | 2019-01-23 | Power circuit and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910065203.1A CN109861519A (en) | 2019-01-23 | 2019-01-23 | Power circuit and air conditioner |
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| Publication Number | Publication Date |
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| CN109861519A true CN109861519A (en) | 2019-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910065203.1A Pending CN109861519A (en) | 2019-01-23 | 2019-01-23 | Power circuit and air conditioner |
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| CN (1) | CN109861519A (en) |
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| CN111245262A (en) * | 2020-03-17 | 2020-06-05 | 美的集团股份有限公司 | Buck-boost driving circuit, air conditioner, method and computer-readable storage medium |
| CN111342685A (en) * | 2020-03-17 | 2020-06-26 | 美的集团股份有限公司 | Buck-boost driving circuit, method, air conditioner and computer readable storage medium |
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Application publication date: 20190607 |