CN108075640A - EMI suppression circuits, Switching Power Supply, DC power supply and household electrical appliance - Google Patents
EMI suppression circuits, Switching Power Supply, DC power supply and household electrical appliance Download PDFInfo
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- CN108075640A CN108075640A CN201611015587.9A CN201611015587A CN108075640A CN 108075640 A CN108075640 A CN 108075640A CN 201611015587 A CN201611015587 A CN 201611015587A CN 108075640 A CN108075640 A CN 108075640A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Dc-Dc Converters (AREA)
Abstract
The embodiment of the present invention provides a kind of EMI suppression circuits, Switching Power Supply, DC power supply and household electrical appliance for DC power supply, belongs to electromagnetic interference and inhibits field.The Switching Power Supply is used to the alternating current from AC power being converted to direct current electricity output, and wherein the EMI suppression circuits include：Filter capacitor, the first end of filter capacitor are connected to ground terminal, and second end is connected to the output terminal of DC DC converting units；First capacitance, the first end of the first capacitance are connected to the first end of filter capacitor, the second capacitance, and the second capacitance first end is connected to the second end of filter capacitor；And first capacitance second end and the second end of the second capacitance one of be wherein connected to the cathode output end of rectification module, another one is connected at one in following many places：The direct current cathode output end of rectification module, the zero curve of AC power, firewire.Thereby, it is possible to provide a kind of scheme of effective control EMI ground connection, the EMI problems of Switching Power Supply can be effectively eliminated.
Description
Technical field
The present invention relates to electromagnetic interference suppression technology fields, and in particular, to a kind of EMI for DC power supply inhibits electricity
Road, Switching Power Supply, DC power supply and household electrical appliance.
Background technology
Due to linear power supply transfer efficiency it is low the defects of so that the higher Switching Power Supply of transfer efficiency has obtained numerous family expenses
The pro-gaze of electric appliance production firm and popularization and application.
The operation principle of Switching Power Supply is：Alternating current is directly made into DC current by Switching Power Supply in input terminal, and
Under the action of high-frequency oscillating circuits, with the break-make of switch controlled electric current, high-frequency pulse current is formed, then again in the side of inductance
It helps down, exports stable low-voltage dc power supply.Leading to common switching tube has transistor, silicon-controlled, magnetic switch etc..Switching tube works
When cut-off region, the disconnection of mechanical switch is equivalent to；When switching tube is operated in saturation region, mechanical switch is equivalent to
Closure.
But when Switching Power Supply is operated in cut-off and saturation region repeatedly, switchs and constantly disconnect closure, in PN junction
In constantly form di/dt and du/dt energy accumulatings, these transient energies have little time to guide, can in the form of an electromagnetic wave to sky
Between radiate, formed tens million to hundreds of million wideband radiation electromagnetic interference so that current household appliances have jointly
Electromagnetic interference (EMI) problem.
In the prior art in order to solve the problems, such as that Conducted EMI is exceeded, it will usually be set using close to power port one side
Common mode interference signal wave filter, to inhibit to common-mode signal.When the electric power of household appliances is bigger, this can be caused
Kind EMI solutions usually have the shortcomings that following apparent：
Firstth, common mode inhibition device head is bigger, it is necessary to occupy circuit board larger space, is unfavorable for the design of circuit board
And layout；
Secondth, the cost of common mode inhibition device is higher；
3rd, common mode inhibition device heating amount is big, causes the reduction of complete machine thermal conversion efficiency.
A kind of cheap, design is simply as a result, occupancy is small, thermal losses is low and can effectively inhibit Switching Power Supply
The EMI suppression circuits of EMI problems are current industry technical barriers urgently to be resolved hurrily.
It is found it is pointed out that more than technical problem is the present inventor during the present invention is put into practice
's.
The content of the invention
The purpose of one side of the embodiment of the present invention be to provide it is a kind of it is cheap, design is simple, occupies small, thermal losses
The EMI suppression circuits for DC power supply that are low and can effectively inhibiting switch power supply EMI problem；The mesh of another aspect of the present invention
Be to provide a kind of Switching Power Supply comprising above-mentioned EMI suppression circuits, a kind of DC power supply and one for including above-mentioned Switching Power Supply
The household electrical appliance of above-mentioned DC power supply kind are included, the technical issues of at least to solve to illustrate in background technology.
To achieve these goals, on the one hand the embodiment of the present invention provides a kind of EMI suppression circuits for DC power supply,
The DC power supply includes non-isolated Switching Power Supply and rectification module, and wherein the non-isolated Switching Power Supply is included and is linked in sequence
AC-DC converting units, transformer, the first rectifier diode and DC-DC converting units, the non-isolated Switching Power Supply be used for will
High Level AC Voltage from AC power is converted to low-voltage DC and is exported via above-mentioned DC-DC converting units, the rectification mould
Block is used to the High Level AC Voltage from AC power being converted to high voltage direct current and via the direct-flow positive pole of above-mentioned rectification module
It is exported with cathode output end, which includes：
Filter capacitor, the first end of above-mentioned filter capacitor are connected to ground terminal, and it is single that second end is connected to above-mentioned DC-DC conversions
The output terminal of member；
First capacitance, the first end of above-mentioned first capacitance are connected to the above-mentioned first end of above-mentioned filter capacitor, the second capacitance,
Above-mentioned second capacitance first end is connected to the above-mentioned second end of above-mentioned filter capacitor；And
The second end of above-mentioned first capacitance and the second end of above-mentioned second capacitance one of are wherein connected to above-mentioned rectification mould
The cathode output end of block, another one are connected to one of following more persons：The direct current cathode output end of above-mentioned rectification module, exchange
Zero curve, the firewire of power supply.
Preferably, above-mentioned first capacitance and/or above-mentioned second capacitance are ceramic disc capacitor.
Preferably, the pressure voltage of above-mentioned first capacitance and/or above-mentioned second capacitance is 220-3000VAC.
Preferably, the capacitance size of above-mentioned first capacitance and/or above-mentioned second capacitance is 101-104.
Another aspect of the present invention provides a kind of non-isolated Switching Power Supply, including：
AC-DC converting units, transformer, the first rectifier diode and the DC-DC converting units being linked in sequence, this is non-isolated
Formula Switching Power Supply is used to the High Level AC Voltage from AC power being converted to low-voltage DC and be converted via above-mentioned DC-DC single
Member output；
EMI suppression circuits described above.
Preferably, which also includes：Second and third rectifier diode, second and third rectifier diode
Anode is respectively connected to the firewire and zero curve of alternating voltage, and cathode connects the input terminal of above-mentioned AC-DC converting units.
Preferably, above-mentioned DC-DC converting units are exported comprising one or more, wherein each output is equipped with institute above
The EMI suppression circuits stated.
Another aspect of the invention provides a kind of DC power supply, including：
Non-isolated Switching Power Supply described above, for the High Level AC Voltage of AC power to be converted to low-voltage DC
Output；And
Rectification module, for the High Level AC Voltage of above-mentioned AC power to be converted to high voltage direct current electricity output.
Preferably, above-mentioned rectification module is rectifier bridge.
Further aspect of the embodiment of the present invention provides a kind of household electrical appliance, including according to above-mentioned DC power supply.
Preferably, which is the household electrical appliances such as electromagnetic oven, electric cooker.
In the EMI suppression circuits that the invention described above technical solution is provided, filtered by being bridged in switched power output
Capacitance, and distinguish flying capcitor in the both sides of the filter capacitor, thus a kind of control EMI ground connection can be effectively provided using above-mentioned
Scheme can effectively eliminate the EMI problems of Switching Power Supply；Common utilization EMI filter circuit is to solve in compared with the prior art
The certainly EMI problems of Switching Power Supply, the EMI suppression circuits of the earthing mode provided by the present invention can more thoroughly eliminate electricity
The problem of magnetic disturbance；And the electronic component employed in the EMI suppression circuits is simple, of low cost, is advantageously implemented this
EMI suppression circuits are widelyd popularize, and are particluarly suitable for promoting and applying in all household electrical appliance.
The other feature and advantage of the embodiment of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is that the embodiment of the present invention is further understood for providing, and a part for constitution instruction, under
The specific embodiment in face is together for explaining the embodiment of the present invention, but do not form the limitation to the embodiment of the present invention.Attached
In figure：
Fig. 1 is illustrated that the structure diagram of the DC power supply of first embodiment of the invention；
Fig. 2 is illustrated that the structure diagram of the DC power supply of second embodiment of the invention；
Fig. 3 is illustrated that the structure diagram of the DC power supply of third embodiment of the invention；
Fig. 4 is illustrated that the structure diagram of the DC power supply of fourth embodiment of the invention；
Fig. 5 is illustrated that the structure diagram of the DC power supply of fifth embodiment of the invention；
Fig. 6 is illustrated that when not including the EMI suppression circuits in the embodiment of the present invention in Switching Power Supply circuit, for opening
The EMI test results of powered-down resource loop；
Fig. 7 is illustrated that when including the EMI suppression circuits in the embodiment of the present invention in Switching Power Supply circuit, for switch
The EMI test results of electric power loop.
Reference sign
ACL AC power firewire ACN AC power zero curves
10A-10E EMI suppression circuits C1、C2Capacitance
C3Filter capacitor VOSwitched power output
20A-20E Switching Power Supplies D1、D2、D3Rectifier diode
AC rectifier bridge input terminal V+, V- rectification bridge output ends
Tr transformer 30A-30E DC power supplies
Specific embodiment
The specific embodiment of the present invention is described in detail below in conjunction with attached drawing.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
Those skilled in the art of the present technique are appreciated that the wording " comprising " used in the specification of the present invention refers to that there are upper
Feature, integer, step, operation, element and/or component are stated, but it is not excluded that other one or more features of presence or addition,
Integer, step, operation, element, component and/or their group.It should be understood that when we claim element be " connected " or " coupled " to
During another element, it can be directly connected or coupled to other elements or there may also be intermediary elements.In addition, make here
" connection " or " coupling " can include wireless connection or wireless coupling.Wording "and/or" used herein include one or
The whole or any cell of more associated list items and all combination.
Referring to Fig. 1-5 be shown respectively be DC power supply under different embodiments of the invention structure diagram, wherein should
DC power supply 30A-30E includes non-isolated Switching Power Supply 20A-20E respectively, and in each non-isolated Switching Power Supply 20A-
Using there is the EMI suppression circuits that the embodiment of the present invention is provided in 20D, as can be seen from the figure using the EMI suppression circuits
Switching Power Supply is connected to the firewire and zero curve of AC power, the AC-DC converting units that are linked in sequence, transformer Tr, the first rectification
Diode D1With DC-DC converting units, which is used to be converted to the alternating current from AC power directly
Galvanic electricity is simultaneously exported via the DC-DC converting units, can the alternating current that AC power exports be converted to direct current, rectification
Bridge, for the High Level AC Voltage from AC power to be converted to high voltage direct current and via the direct-flow positive pole V+ of rectifier bridge and negative
Pole output terminal V- is exported.On the more specific structure of EMI suppression circuits, as shown in Figure 1, EMI suppression circuits 10A is included
Have：Filter capacitor C3, capacitance C1, capacitance C2；Filter capacitor C3One end be connected to ground terminal, filter capacitor C3The other end connection
To the output terminal of DC-DC converting units；Capacitance C1One end be connected to filter capacitor C3It is connected to one end of ground terminal, the other end
It is connected to the firewire ACL of AC power；Capacitance C2One end be connected to the direct current cathode output end V- of rectifier bridge, other end connection
One end of the output terminal of DC-DC converting units is connected to filter capacitor.As shown in Fig. 2, EMI suppression circuits 10B includes：
Filter capacitor C3, capacitance C1, capacitance C2；Filter capacitor C3One end be connected to ground terminal, filter capacitor C3The other end be connected to
The output terminal of DC-DC converting units；Capacitance C1One end be connected to filter capacitor C3One end of ground terminal is connected to, the other end connects
It is connected to the zero curve ACN of AC power；Capacitance C2One end be connected to the direct current cathode output end V- of rectifier bridge, the other end is connected to
Filter capacitor is connected to one end of the output terminal of DC-DC converting units.As shown in figure 3, EMI suppression circuits 10C includes：Filter
Ripple capacitance C3, capacitance C1, capacitance C2；Filter capacitor C3One end be connected to ground terminal, filter capacitor C3The other end be connected to DC-
The output terminal of DC converting units；Capacitance C1One end be connected to filter capacitor C3One end of ground terminal is connected to, the other end is connected to
The direct current cathode output end V- of rectifier bridge；Capacitance C2One end be connected to the firewire ACL of AC power, the other end is connected to filtering
Capacitance connection is to one end of the output terminal of DC-DC converting units.As shown in figure 4, EMI suppression circuits 10D includes：Filtered electrical
Hold C3, capacitance C1, capacitance C2；Filter capacitor C3One end be connected to ground terminal, filter capacitor C3The other end be connected to DC-DC turn
Change the output terminal of unit；Capacitance C1One end be connected to filter capacitor C3One end of ground terminal is connected to, the other end is connected to rectification
The direct current cathode output end V- of bridge；Capacitance C2One end be connected to the zero curve ACN of AC power, the other end is connected to filter capacitor
It is connected to one end of the output terminal of DC-DC converting units.As shown in figure 5, EMI suppression circuits 10E includes：Filter capacitor
C3, capacitance C1, capacitance C2；Filter capacitor C3One end be connected to ground terminal, filter capacitor C3The other end be connected to DC-DC conversion
The output terminal of unit；Capacitance C1One end be connected to filter capacitor C3One end of ground terminal is connected to, the other end is connected to rectifier bridge
Direct current cathode output end V-；Capacitance C2One end be connected to the direct current cathode output end V- of rectifier bridge, the other end is connected to filter
Ripple capacitance C3It is connected to one end of the output terminal of DC-DC converting units.It is understood that in EMI suppression circuits 10A-10E
The connection of electronic component and AC power firewire ACL or zero curve ACN should be indirectly connected with, and more specifically the electronic component can
To be based on being realized and AC power firewire ACL or zero curve ACN for being connected to the power interface of firewire ACL or zero curve ACN
Connection.In the present embodiment, it is possible to using by C1、C2、C3With ground terminal effectively by the interference signal of Switching Power Supply incoming end with
The mode of ground connection is filtered out, and thus eliminates Switching Power Supply generated powerful electromagnetic interference signal during the work time, especially
It is 30MHz-230MHz that it, which can be eliminated using the reluctant band limits of filtering EMI suppression circuits of the prior art,
Interference signal.In some optional embodiments of the invention, the carrier of above-mentioned EMI suppression circuits is PCB circuit board, and the PCB is electric
Road plate is single sided board or multi-layer board, and when the carrier uses multi-layer board, the ground terminal in the present embodiment should individually define Horizon
Face, when the carrier uses lamina, the ground terminal in the present embodiment should schedule out special earth-return；It is dry thus, it is possible to realize
The rapid grounding of signal is disturbed, improves the elimination efficiency of interference signal.
The type selecting parameter of each component in the EMI suppression circuits will be continued to disclose below：Capacitance C1With capacitance C2To be high pressure resistant
Capacitance is preferably ceramic disc capacitor, should require capacitance C1Pressure voltage at least can be more than AC power voltage value；When should
When EMI suppression circuits are applied in household appliances, the pressure voltage of capacitance should be set to 220-3000VAC.Capacitance C1Capacitance
Amount size is 101-104, it is to be understood that the method for expressing of the capacitance should be well-known to those skilled in the art, electricity
Amount of capacity 101 means that 10 multiply 10 first power PF, and capacitance size 104 represents that 10 multiply 10 biquadratic PF；Thus, it is possible to
Ensure that Switching Power Supply can work normally, without being burned.Filter capacitor C in the embodiment of the present invention3Model and capacitance
It does not limit herein, because connecting filter capacitor C by the output terminal in Switching Power Supply in the embodiment of the present invention3, realize interference
The coupling grounding of signal.
In order to prove that the EMI suppression circuits that the embodiment of the present invention is provided are directed to electromagnetic interference with good inhibition effect
Fruit, inventor employ control experiment also directed to the embodiment of the present invention, and the wherein reference object in control experiment is：Not comprising having
The Switching Power Supply circuit for the EMI suppression circuits that the embodiment of the present invention is provided；Experimental subjects is：The switch identical with reference object
Electric power loop differs only in experimental subjects and employs the EMI suppression circuits 10A-10E that the embodiment of the present invention is provided.Fig. 6 and
The EMI supplemental characteristics that Fig. 7 was represented respectively is reference object and experimental subjects is exported, by correction data, with reference to right
The super normal EMI indexs of EMI parameters of elephant are up to 16dB, and the EMI parameters of experimental subjects also leave compared to normal EMI indexs
The surplus of 3dB.Therefore can intuitively determine very much：The EMI suppression circuits that the embodiment of the present invention is provided significantly can effectively press down
The EMI problems in Switching Power Supply circuit processed.
With continued reference to Fig. 1-Fig. 5, the concrete structure of wherein Unisolated switch power supply 20A-20E is：Comprising above-mentioned above
EMI suppression circuits 10A-10E and the AC-DC converting units being linked in sequence, transformer Tr, the first rectifier diode D1And DC-
DC converting units, the non-isolated Switching Power Supply are used to the alternating current from AC power being converted to direct current and via this
DC-DC converting units export, and can the alternating current that AC power exports be converted to direct current；Above-mentioned EMI wherein above
Suppression circuit is connected to the output terminal of the DC-DC converting units, to realize to interference signal caused by Switching Power Supply work
Inhibit.Wherein the AC-DC converting units include AC-DC chips, and the alternating current from AC power is converted to direct current
Export VO, the VOGenerally low pressure out-put supply, for the low-voltage control circuit (not shown) power supply being connected with Switching Power Supply；It needs
Illustrate, as low voltage control load circuit and VODuring connection, capacitor C3Loop is formed with load circuit so that in C3It is upper
All there is noise end and lower end, although C3Here it is filter circuit, but because the presence of the loop, causes C3Above and below both ends
There is noise, and noise intensity differs under normal circumstances, is easy in C3Place forms EMI radiation source again；Therefore pass through this reality
Example is applied in C3Both ends capacitance C is set respectively1With capacitance C2So that C3The noise at both ends is grounded rapidly and eliminates EMI noise.
In some alternative embodiments of the present invention, Switching Power Supply 20A-20D also includes the second rectification diode D2With the 3rd rectification two level
Pipe D3, rectifier diode D2、D3Anode be connected to AC power firewire ACL, rectifier diode D2、D3Cathode be connected to
AC power zero curve ACN is achieved in the rectification of the input current for AC-DC converting units, and can ensure that AC-DC conversions are single
The voltage V that member is exportedOQuality and transfer efficiency.In some optional embodiments of the present invention, when above-mentioned low voltage control
Circuit need AC-DC converting units have multiplex operation export (not shown) when, be correspondingly each output of AC-DC converting units
The EMI suppression circuits being fitted in foregoing embodiments are carried out from there through by the electromagnetic interference signal in each branch
It filters out, can more effectively reduce the electromagnetic interference (EMI) emissions in Switching Power Supply circuit.With continued reference to Fig. 1-4, wherein DC power supply
Respectively comprising Switching Power Supply 20A-20D and rectifier bridge, the output terminal V+ and V- of the rectifier bridge are used to export high voltage direct current 30A-30D
Electricity output works for high-voltage load.It is thus achieved that by low voltage control end high-voltage load circuit being controlled to work, reduce low
Generated electromagnetic interference when pressure side controls work.It should be noted that the rectifier bridge in the embodiment of the present invention can also be by it
The rectification module that he has rectification function is replaced, and all should be to belong to the protection domain that the present invention is covered.
In an alternative embodiment of the invention, a kind of household electrical appliance are also provided, which includes DC power supply.On straight
The structure in galvanic electricity source is referred to above-described embodiment, therefore not in this to go forth.By being equipped with the DC power supply for household electrical appliance,
The electromagnetic interference (EMI) emissions of household electrical appliance can effectively be reduced.More specifically, the household electrical appliance can be electromagnetic oven, electric cooker or its
His household appliances, thus, it is possible to reduce the electromagnetic interference (EMI) emissions of household appliances.
The optional embodiment of example of the present invention, still, the embodiment of the present invention and unlimited are described in detail above in association with attached drawing
Detail in the above embodiment, can be to the embodiment of the present invention in the range of the technology design of the embodiment of the present invention
Technical solution carry out a variety of simple variants, these simple variants belong to the protection domain of the embodiment of the present invention.
It is further to note that the specific technical features described in the above specific embodiments, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the embodiment of the present invention pair
Various combinations of possible ways no longer separately illustrate.
It will be appreciated by those skilled in the art that it is that can pass through to implement the method for the above embodiments
Program instructs relevant hardware to complete, which uses including some instructions so that one in a storage medium
A (can be microcontroller, chip etc.) or processor (processor) perform the whole of each embodiment above method of the application
Or part steps.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
In addition, it can also be combined between a variety of embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is run counter to, should equally be considered as disclosure of that of the embodiment of the present invention.
Claims (11)
1. a kind of EMI suppression circuits for DC power supply, which includes non-isolated Switching Power Supply and rectification mould
Block, the wherein non-isolated Switching Power Supply include be linked in sequence AC-DC converting units, transformer, the first rectifier diode and
DC-DC converting units, the non-isolated Switching Power Supply are used to the High Level AC Voltage from AC power being converted to low-voltage direct
Electricity is simultaneously exported via the DC-DC converting units, which is used to be converted to the High Level AC Voltage from AC power
High voltage direct current is simultaneously exported via the direct-flow positive pole and cathode output end of the rectification module, which is characterized in that the EMI inhibits electricity
Road includes：
Filter capacitor, the first end of the filter capacitor are connected to ground terminal, and second end is connected to the DC-DC converting units
Output terminal；
First capacitance, the first end of first capacitance are connected to the first end of the filter capacitor；And
Second capacitance, the first end of second capacitance are connected to the second end of the filter capacitor,
The second end of first capacitance and the second end of second capacitance one of are wherein connected to the rectification module
Cathode output end, another one are connected to one of following more persons：The direct current cathode output end of the rectification module, AC power
Zero curve, firewire.
2. EMI suppression circuits according to claim 1, it is characterised in that：
First capacitance and/or second capacitance are ceramic disc capacitor.
3. EMI suppression circuits according to claim 1 or 2, it is characterised in that：
The pressure voltage of first capacitance and/or second capacitance is 220-3000VAC.
4. EMI suppression circuits according to claim 1 or 2, it is characterised in that：
The capacitance size of first capacitance and/or second capacitance is 101-104.
5. a kind of non-isolated Switching Power Supply, which is characterized in that including：
AC-DC converting units, transformer, the first rectifier diode and the DC-DC converting units being linked in sequence, this is non-isolated to open
Powered-down source is used to the High Level AC Voltage from AC power being converted to low-voltage DC and defeated via the DC-DC converting units
Go out；
Claim 1-4 any one of them EMI suppression circuits.
6. non-isolated Switching Power Supply according to claim 5, which is characterized in that the Switching Power Supply also includes：
Second and third rectifier diode, the anode of second and third rectifier diode are respectively connected to the firewire of alternating voltage
And zero curve, cathode connect the input terminal of the AC-DC converting units.
7. non-isolated Switching Power Supply according to claim 5, which is characterized in that the DC-DC converting units include one
Road or multiple-channel output, wherein each output is equipped with according to claim 1-4 any one of them EMI suppression circuits.
8. a kind of DC power supply, which is characterized in that including：
The non-isolated Switching Power Supply of claim 5-7 any one of them, for the High Level AC Voltage of AC power to be converted to
Low-voltage direct electricity output；And
Rectification module, for the High Level AC Voltage of the AC power to be converted to high voltage direct current electricity output.
9. DC power supply according to claim 8, it is characterised in that：
The rectification module is rectifier bridge.
10. a kind of household electrical appliance, which is characterized in that including DC power supply according to claim 8 or claim 9.
11. household electrical appliance according to claim 10, which is characterized in that the household electrical appliance are the families such as electromagnetic oven, electric cooker
Electricity.
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| CN201611015587.9A CN108075640B (en) | 2016-11-18 | 2016-11-18 | EMI suppression circuit, switching power supply, direct current power supply and household appliance |
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| CN201611015587.9A CN108075640B (en) | 2016-11-18 | 2016-11-18 | EMI suppression circuit, switching power supply, direct current power supply and household appliance |
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| Publication number | Publication date |
|---|---|
| CN108075640B (en) | 2020-07-14 |
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