CN110289756A - A kind of electric appliance and its standby power - Google Patents
A kind of electric appliance and its standby power Download PDFInfo
- Publication number
- CN110289756A CN110289756A CN201910562925.8A CN201910562925A CN110289756A CN 110289756 A CN110289756 A CN 110289756A CN 201910562925 A CN201910562925 A CN 201910562925A CN 110289756 A CN110289756 A CN 110289756A
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- Prior art keywords
- capacitor
- alternating current
- controllable switch
- switch
- standby power
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- 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
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Rectifiers (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of standby powers, including fairing, for the alternating current of alternating current to be converted to Rectified alternating current；Processor, when being lower than preset threshold for the voltage in Rectified alternating current, control controllable switch conducting, when the voltage of Rectified alternating current is higher than preset threshold, control controllable switch is disconnected；The controllable switch being connect respectively with fairing, processor and linear voltage regulator；With the linear voltage regulator of load connection, in preset voltage value and load is supplied to for will be less than the voltage stabilization of Rectified alternating current of preset threshold when controllable switch is connected.Since the pulsating direct current electric frequency after rectifying to alternating current is usually 50Hz or 100Hz, preset threshold switch controllable switch at most only need to each 100 times in one second, and switching frequency is lower, and EMI is smaller, there is no need to which the special circuit for inhibiting EMI is arranged, reduce costs.The invention also discloses a kind of electric appliances, have the identical beneficial effect of standby power as above.
Description
Technical field
The present invention relates to power technique fields, and more particularly to a kind of standby power, the invention further relates to a kind of electric appliances.
Background technique
The electric appliances such as household electrical appliance are frequently necessary to work in the standby state, need standby power to provide for it lower standby
Voltage, standby power in the prior art first rectify the alternating current of alternating current, are then depressured using BUCK circuit
And powering load, the switching tube inside BUCK circuit usually require work in higher switching frequency range, usually thousand
Hertz rank, therefore standby power in the prior art can generate stronger EMI (Electromagnetic
Interference, electromagnetic interference), the corresponding circuit for needing the setting inhibition EMI in standby power, and under normal conditions
The higher cost of EMI suppression circuit, increases cost.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that those skilled in the art need to solve at present
Problem.
Summary of the invention
The object of the present invention is to provide a kind of standby powers, and switching frequency is lower, can be controllable with slower speed control
The EMI of switch on and off, generation is smaller, there is no need to which the special circuit for inhibiting EMI is arranged, reduces costs；Of the invention is another
One purpose is to provide a kind of electric appliance including above-mentioned standby power, and switching frequency is lower, can be controllable with slower speed control
The EMI of switch on and off, generation is smaller, there is no need to which the special circuit for inhibiting EMI is arranged, reduces costs.
In order to solve the above technical problems, the present invention provides a kind of standby powers, comprising:
Fairing, for the alternating current of alternating current to be converted to Rectified alternating current；
Processor, when being lower than preset threshold for the voltage in the Rectified alternating current, control controllable switch conducting, in institute
When stating the voltage of Rectified alternating current higher than preset threshold, controls the controllable switch and disconnect；
The controllable switch being connect respectively with the fairing, the processor and linear voltage regulator；
The linear voltage regulator connected with load, for will be less than the preset threshold in controllable switch conducting
The voltage stabilization of the Rectified alternating current in preset voltage value and be supplied to the load.
Preferably, the standby power further include:
Respectively with the condenser type charge-discharge circuit of the linear voltage regulator and the load connection, it is used for described controllable
When switch conduction, the capacitor of therein stores the Rectified alternating current, when the controllable switch disconnects, the institute of therein
State the electric energy of capacitor release storage.
Preferably, the condenser type charge-discharge circuit includes first capacitor, the second capacitor, first switch device, second opens
Close device, third switching device and resistance；
The first end of the resistance is connect with the first end of the controllable switch, the second end of the resistance and described first
The cathode of the first end of capacitor, the first end of the linear voltage regulator and the second switch device connects, first electricity
The second end of appearance is connect with the cathode of the positive and described third switching device of the first switch device respectively, and described second
The anode of switching device is connect with the first end of the cathode of the first switch device and second capacitor respectively, described negative
The cathode of load, the third switching device the second end of positive and described second capacitor be grounded, the linear voltage regulator
The anode of output end and the load connect；
Wherein, the switch state of the first switch device is consistent with the switch state of the controllable switch, and described second
Switching device and the third switching device are turned off when the controllable switch is connected, to be the first capacitor and institute
The second capacitor charging is stated, is connected in controllable switch shutdown, so that the first capacitor and second capacitor are to institute
State linear voltage regulator power supply.
Preferably, which further includes third capacitor；
The first end of the third capacitor connects with the output end of the linear voltage regulator and the anode of the load respectively
It connects, the second end of the second end of the third capacitor and positive, described second capacitor of the third switching device and described
The cathode of load is altogether.
Preferably, at least one of the first capacitor, second capacitor and described third capacitor are polarity electricity
Hold.
Preferably, the first capacitor, second capacitor and the third capacitor are electrolytic capacitor.
Preferably, the linear voltage regulator is low pressure difference linear voltage regulator LDO.
Preferably, the controllable switch is Metal Oxide Semiconductor Field Effect Transistor metal-oxide-semiconductor.
Preferably, the fairing is any one in bridge rectifier, half-wave rectifier and full-wave rectifier.
In order to solve the above technical problems, the present invention also provides a kind of electric appliances, including as above described in any item to electromechanics
Source.
The present invention provides a kind of standby powers, including fairing, straight for the alternating current of alternating current to be converted to pulsation
Galvanic electricity；Processor, when being lower than preset threshold for the voltage in Rectified alternating current, control controllable switch conducting, in pulsating direct current
When the voltage of electricity is higher than preset threshold, control controllable switch is disconnected；Connect respectively with fairing, processor and linear voltage regulator
The controllable switch connect；The linear voltage regulator connected with load, for will be less than the pulsation of preset threshold when controllable switch is connected
The voltage stabilization of direct current is in preset voltage value and is supplied to load.
As it can be seen that waveform is since the pulsating direct current electric frequency after rectifying to alternating current is usually 50Hz or 100Hz
Steamed bun wave above X-axis is opened correspondingly, preset threshold switch controllable switch at most only need to each 100 times in one second
It is lower to close frequency, can be with slower speed control controllable switch on-off, the EMI of generation is smaller, special there is no need to be arranged
The circuit for inhibiting EMI, reduces costs.
The present invention also provides a kind of electric appliances, have the identical beneficial effect of standby power as above.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of standby power provided by the invention；
Fig. 2 is the structural schematic diagram of another standby power provided by the invention；
Fig. 3 a is a kind of structural schematic diagram of the standby power of halfwave rectifier provided by the invention；
Fig. 3 b is a kind of structural schematic diagram of the standby power of bridge rectifier provided by the invention；
Fig. 3 c is a kind of structural schematic diagram of the standby power of full-wave rectification provided by the invention.
Specific embodiment
Core of the invention is to provide a kind of standby power, and switching frequency is lower, can be controllable with slower speed control
The EMI of switch on and off, generation is smaller, there is no need to which the special circuit for inhibiting EMI is arranged, reduces costs；Of the invention is another
One core is to provide a kind of electric appliance including above-mentioned standby power, and switching frequency is lower, can be controllable with slower speed control
The EMI of switch on and off, generation is smaller, there is no need to which the special circuit for inhibiting EMI is arranged, reduces costs.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is a kind of structural schematic diagram of standby power provided by the invention, comprising:
Fairing 1, for the alternating current of alternating current to be converted to Rectified alternating current；
Processor 2, when being lower than preset threshold for the voltage in Rectified alternating current, control controllable switch 3 is connected, and is being pulsed
When the voltage of direct current is higher than preset threshold, control controllable switch 3 is disconnected；
The controllable switch 3 being connect respectively with fairing 1, processor 2 and linear voltage regulator 4；
The linear voltage regulator 4 connected with load, for will be less than the pulsating direct current of preset threshold when controllable switch 3 is connected
The voltage stabilization of electricity in preset voltage value and is supplied to load.
Specifically, Rectified alternating current is steamed bun wave, size has periodic variation, appropriate default by being arranged
Threshold value can control the conducting when the voltage of Rectified alternating current is lower than preset threshold of controllable switch 3, and voltage is lower than default threshold at this time
The Rectified alternating current of value can flow to linear voltage regulator 4 by controllable switch 3, and linear voltage regulator 4 is lower than the voltage received
The Rectified alternating current of preset threshold can power to the load after carrying out pressure stabilizing.
Wherein, linear voltage regulator 4 can be greater than itself minimum requirements by voltage lower than in the Rectified alternating current of preset threshold
The Rectified alternating current of input voltage carry out voltage drop reduction process, and export it with preset voltage value, to provide to load
The direct current of voltage stabilization, wherein preset voltage value can be multiple types, such as can be 5V and 3.3V etc., the present invention
Embodiment is it is not limited here.
Specifically, preset threshold can independently be set, such as it can be set to linear voltage regulator 4 and allow to input electricity
Any voltage value etc. in range is pressed, such as 20V etc., the embodiment of the present invention is it is not limited here.
Specifically, standby power in the application voltage can be converted to lower than the Rectified alternating current of preset threshold it is default
The voltage of voltage value is supplied to load, since preset threshold can be set lower, helps to improve the electricity in the application
Can transfer efficiency, saved electric energy, and the switching frequency of the controllable switch 3 in the application at most with the frequency phase of Rectified alternating current
Together, i.e. 100Hz, therefore the controllable switch 3 in the application can be significantly reduced and controllably be opened with slower speed control on-off
The EMI that 3 generate is closed to reduce costs there is no need to which additional EMI suppression circuit is arranged.
The present invention provides a kind of standby powers, including fairing, straight for the alternating current of alternating current to be converted to pulsation
Galvanic electricity；Processor, when being lower than preset threshold for the voltage in Rectified alternating current, control controllable switch conducting, in pulsating direct current
When the voltage of electricity is higher than preset threshold, control controllable switch is disconnected；Connect respectively with fairing, processor and linear voltage regulator
The controllable switch connect；The linear voltage regulator connected with load, for will be less than the pulsation of preset threshold when controllable switch is connected
The voltage stabilization of direct current is in preset voltage value and is supplied to load.
As it can be seen that waveform is since the pulsating direct current electric frequency after rectifying to alternating current is usually 50Hz or 100Hz
Steamed bun wave above X-axis is opened correspondingly, preset threshold switch controllable switch at most only need to each 100 times in one second
It is lower to close frequency, can be with slower speed control controllable switch on-off, the EMI of generation is smaller, special there is no need to be arranged
The circuit for inhibiting EMI, reduces costs.
On the basis of the above embodiments:
Embodiment as one preferred, the standby power further include:
Respectively with the condenser type charge-discharge circuit 5 of linear voltage regulator 4 and load connection, it is used to be connected in controllable switch 3
When, the capacitor of therein stores Rectified alternating current, when controllable switch 3 disconnects, the electricity of the capacitor release storage of therein
Energy.
In order to be preferably illustrated to the embodiment of the present invention, referring to FIG. 2, Fig. 2 be it is provided by the invention it is another to
The structural schematic diagram of electromechanical source.
Specifically, in view of when the pulsating direct current using voltage lower than preset threshold supplies electricity to the power supply of linear voltage regulator 4
It waits, since voltage is 0 to preset threshold lower than the voltage of the Rectified alternating current of preset threshold, it means that wherein necessarily there is electricity
It forces down in the Rectified alternating current of the minimum requirements voltage value of linear voltage regulator 4, when this part, Rectified alternating current is input to linear steady
When depressor 4, linear voltage regulator 4 can not carry out boosting and to it with preset voltage value output, this part Rectified alternating current
Just naturally it is wasted, and voltage can be lower than default threshold by the condenser type charge-discharge circuit 5 in inventive embodiments
The arbitrary portion of the Rectified alternating current of value is stored, and does not have the waste of electric energy, then releases all electric energy that itself is stored
It puts to linear voltage regulator 4 to be powered to load, improves energy conversion efficiency, saved electric energy.
Wherein, since the capacity of the storage electric energy of capacitor is greater than inductance, there is no need to high as inductance type charge and discharge
Controllable switch 3 is switched fastly, also therefore would not increase EMI.
Specifically, need to ensure the capacitor inside condenser type charge-discharge circuit 5 when charging to condenser type charge-discharge circuit 5
The voltage at both ends be higher than linear voltage regulator 4 it is minimum can operating voltage, so that linear voltage regulator 4 is in condenser type charge-discharge circuit 5
Work is carried out when electric discharge and is load supplying, wherein ensures that 5 internal capacitance both end voltage of condenser type charge-discharge circuit can be higher than
Linear voltage regulator 4 it is minimum can the mode of operating voltage can be size that preset threshold is controlled by processor 2, in ensuring
The voltage at portion capacitor both ends be higher than it is minimum can operating voltage, the embodiment of the present invention is it is not limited here.
Embodiment as one preferred, condenser type charge-discharge circuit 5 include first capacitor C1, the second capacitor C2, first
Switching device K1, second switch device K2, third switching device K3 and resistance R1；
The first end of resistance R1 and the first end of controllable switch connect, the second end of resistance R1 and the first of first capacitor C1
The cathode connection at end, the first end of linear voltage regulator and second switch device K2, the second end of first capacitor C1 is respectively with the
The connection of the cathode of the anode of one switching device K1 and third switching device K3, the anode of second switch device K2 is respectively with first
The connection of the first end of the cathode of switching device K1 and the second capacitor C2, the cathode of load, third switching device K3 anode with
And second the second end of capacitor C2 be grounded, the output end of linear voltage regulator is connect with the anode of load；
Wherein, the switch state of first switch device and the switch state of controllable switch are consistent, second switch device K2 with
And third switching device K3 is turned off when controllable switch 3 is connected, to charge for first capacitor C1 and the second capacitor C2, can
Control switch 3 is connected when turning off, so that first capacitor C1 and the second capacitor C2 powers to linear voltage regulator 4.
In order to preferably be illustrated to the embodiment of the present invention, Fig. 3 a, Fig. 3 b and Fig. 3 c, Fig. 3 a are please referred to as the present invention
A kind of structural schematic diagram of the standby power of the halfwave rectifier provided, Fig. 3 b are a kind of the standby of bridge rectifier provided by the invention
The structural schematic diagram of power supply, Fig. 3 c are a kind of structural schematic diagram of the standby power of full-wave rectification provided by the invention, wherein electricity
It include two capacitors in appearance formula charge-discharge circuit 5, and the two capacitors can be electrically charged in the form of concatenated, and with parallel connection
Mode discharge linear voltage regulator 4, in such cases, condenser type charge-discharge circuit 5 can have bigger capacity, and
It is discharged with lesser discharge voltage linear voltage regulator 4.
Wherein, controllable switch 3 is the metal-oxide-semiconductor Q1 in figure.
Wherein, the quantity of capacitor can independently be set according to actual needs in condenser type charge-discharge circuit 5, such as
It can be set to any amount etc. more than or equal to 1, the embodiment of the present invention is it is not limited here.
Specifically, the setting of resistance R1 can limit the electric current in charge circuit, prevent electric in charge circuit
It flows through greatly, resistance value can independently be set according to actual needs, it is of course also possible to be not provided with resistance R1, the present invention is implemented
Example is it is not limited here.
Wherein, first switch device K1, second switch device K2 and third switching device K3 all can be multiple types,
Such as it can be for Schottky diode etc., in addition, second switch device K2 and third switching device K3 can also be with controllably opening
It closes pipe to replace, such as metal-oxide-semiconductor etc., correspondingly, needing when second switch device K2 and third switching device K3 is metal-oxide-semiconductor
Control K2 and K3 shutdown when Q1 is connected, the control K2 and K3 conducting in Q1 shutdown, when the embodiment of the present invention does not limit herein
It is fixed.
Wherein, when K2 and K3 is metal-oxide-semiconductor, processor can control K2 and K3 by route shown in Fig. 3
Open and turn off.
Specifically, the condenser type charge-discharge circuit 5 in Fig. 3 is during the charging process, Rectified alternating current by controllable switch 3,
First capacitor C1, first switch device K1, the second capacitor C2 and resistance R1 fill for first capacitor C1 and the second capacitor C2
Electricity, during discharge, the electric energy in first capacitor C1 can directly be discharged to linear voltage regulator 4, and in the second capacitor C2
Electric energy can be discharged to linear voltage regulator 4 in parallel by being discharged after second switch device K2 to linear voltage regulator 4.
Certainly, other than the specific pattern of the condenser type charge-discharge circuit 5 in the embodiment of the present invention, condenser type charge and discharge electricity
Road 5 can also be other diversified forms, and the embodiment of the present invention is it is not limited here.
Specifically, each device in the embodiment of the present invention can integrate, in IC, (Integrated Circuit is integrated
Circuit) chip inside, such as can by Fig. 3 second switch device K2, third switching device K3 and controllable switch 3,
Processor 2 and linear voltage regulator 4 are integrated in inside IC chip, keep circuit more succinct, convenient for mass production etc..
Embodiment as one preferred, the standby power further include third capacitor C3；
The first end of third capacitor C3 is connect with the output end of linear voltage regulator 4 and the anode of load respectively, third electricity
The cathode of the second end and the anode of third switching device K3, the second end of the second capacitor C2 and load of holding C3 is altogether.
Specifically, third capacitor C3 can be after the electric energy that linear voltage regulator 4 exports preset voltage value, to defeated with reference to Fig. 3
Electric energy out is delivered to load after being filtered again, in such cases, is conducive to improve the power quality that load-receipt arrives, be convenient for
Load is protected, the service life of load is extended.
Embodiment as one preferred, at least one of first capacitor C1, the second capacitor C2 and third capacitor C3
For polar capacitor.
Specifically, polar capacitor has many advantages, such as that capacity is big and performance is good.
Certainly, other than polar capacitor, first capacitor C1, the second capacitor C2 and third capacitor C3 can also be respectively non-
Polar capacitor etc., the embodiment of the present invention is it is not limited here.
Embodiment as one preferred, first capacitor C1, the second capacitor C2 and third capacitor C3 are electrolytic capacitor.
Specifically, electrolytic capacitor capacity is larger, price is lower, and service life is longer.
Certainly, other than being electrolytic capacitor, three may be used also by first capacitor C1, the second capacitor C2 and third capacitor C3
Think other kinds of polar capacitor, the embodiment of the present invention is it is not limited here.
Embodiment as one preferred, linear voltage regulator 4 are low pressure difference linear voltage regulator LDO (Low Dropout
Regulator, low pressure difference linear voltage regulator).
Specifically, LDO has many advantages, such as that minimum input voltage value is lower, long service life and cheap.
Certainly, other than LDO, linear voltage regulator 4 can also be other types, and the embodiment of the present invention is it is not limited here.
Embodiment as one preferred, controllable switch 3 are MOS (Metal-Oxide-Semiconductor Field-
Effect Transistor, Metal Oxide Semiconductor Field Effect Transistor) pipe Q1.
Specifically, metal-oxide-semiconductor Q1 has the advantages that structure is simple, small in size and price is low etc..
Certainly, other than metal-oxide-semiconductor Q1, controllable switch 3 can also be other types, such as triode etc., present invention implementation
Example is it is not limited here.
Embodiment as one preferred, fairing 1 are in bridge rectifier, half-wave rectifier and full-wave rectifier
Any one.
Specifically, half-wave rectifier can export the Rectified alternating current of 50Hz, bridge rectifier and full-wave rectifier are equal
The Rectified alternating current that can be 100Hz by commercial power rectification, can according to actual needs select the type of rectifier, this hair
Bright embodiment is it is not limited here.
Wherein, the half-wave rectifier in Fig. 3 is diode D1, further includes protective tube F1 in circuit.
The present invention also provides a kind of electric appliances, including the standby power in such as previous embodiment.
The embodiment of standby power above-mentioned is please referred to for the introduction of electric appliance provided in an embodiment of the present invention, the present invention is real
Applying example, details are not described herein.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.It should also be noted that, in this theory
In bright book, relational terms such as first and second and the like be used merely to by an entity or operation with another entity or
Operation distinguishes, without necessarily requiring or implying between these entities or operation there are any this actual relationship or
Sequentially.Moreover, the terms "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that
Process, method, article or equipment including a series of elements not only includes those elements, but also including being not explicitly listed
Other element, or further include for elements inherent to such a process, method, article, or device.Do not limiting more
In the case where system, the element that is limited by sentence "including a ...", it is not excluded that including process, method, the object of the element
There is also other identical elements in product or equipment.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of standby power characterized by comprising
Fairing, for the alternating current of alternating current to be converted to Rectified alternating current；
Processor, when being lower than preset threshold for the voltage in the Rectified alternating current, control controllable switch conducting, in the arteries and veins
When the voltage of dynamic direct current is higher than preset threshold, controls the controllable switch and disconnect；
The controllable switch being connect respectively with the fairing, the processor and linear voltage regulator；
The linear voltage regulator connected with load, for will be less than the institute of the preset threshold in controllable switch conducting
The voltage stabilization of Rectified alternating current is stated in preset voltage value and is supplied to the load.
2. standby power according to claim 1, which is characterized in that the standby power further include:
Respectively with the condenser type charge-discharge circuit of the linear voltage regulator and the load connection, it is used in the controllable switch
When conducting, the capacitor of therein stores the Rectified alternating current, when the controllable switch disconnects, the electricity of therein
Hold the electric energy of release storage.
3. standby power according to claim 2, which is characterized in that the condenser type charge-discharge circuit includes the first electricity
Appearance, the second capacitor, first switch device, second switch device, third switching device and resistance；
The first end of the resistance is connect with the first end of the controllable switch, the second end of the resistance and the first capacitor
First end, the first end of the linear voltage regulator and the second switch device cathode connection, the first capacitor
Second end is connect with the cathode of the positive and described third switching device of the first switch device respectively, the second switch
The anode of device is connect with the first end of the cathode of the first switch device and second capacitor respectively, the load
Cathode, the third switching device the second end of positive and described second capacitor be grounded, the linear voltage regulator it is defeated
Outlet is connect with the anode of the load；
Wherein, the switch state of the first switch device is consistent with the switch state of the controllable switch, the second switch
Device and the third switching device are turned off when the controllable switch is connected, to be the first capacitor and described
Two capacitor chargings are connected in controllable switch shutdown, so that the first capacitor and second capacitor are to the line
Property voltage-stablizer power supply.
4. standby power according to claim 3, which is characterized in that the standby power further includes third capacitor；
The first end of the third capacitor is connect with the output end of the linear voltage regulator and the anode of the load respectively, institute
State the second end and the load of the second end of third capacitor and positive, described second capacitor of the third switching device
Cathode is altogether.
5. standby power according to claim 4, which is characterized in that the first capacitor, second capacitor and institute
Stating at least one of third capacitor is polar capacitor.
6. standby power according to claim 5, which is characterized in that the first capacitor, second capacitor and institute
Stating third capacitor is electrolytic capacitor.
7. standby power according to claim 1, which is characterized in that the linear voltage regulator is low pressure difference linear voltage regulator
LDO。
8. standby power according to claim 1, which is characterized in that the controllable switch is MOS field
Effect transistor metal-oxide-semiconductor.
9. standby power according to any one of claims 1 to 8, which is characterized in that the fairing is bridge rectifier
Any one in device, half-wave rectifier and full-wave rectifier.
10. a kind of electric appliance, which is characterized in that including standby power as described in any one of claim 1 to 9.
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Application publication date: 20190927 |