CN107359790A - A kind of electromagnetic compatibility circuit, TV power supply and television set - Google Patents
A kind of electromagnetic compatibility circuit, TV power supply and television set Download PDFInfo
- Publication number
- CN107359790A CN107359790A CN201710736002.0A CN201710736002A CN107359790A CN 107359790 A CN107359790 A CN 107359790A CN 201710736002 A CN201710736002 A CN 201710736002A CN 107359790 A CN107359790 A CN 107359790A
- Authority
- CN
- China
- Prior art keywords
- circuit
- coil
- diode
- electric capacity
- compatible sub
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a kind of electromagnetic compatibility circuit, TV power supply and television set.Wherein, the electromagnetic compatibility circuit includes an at least level electromagnetic compatible sub-circuit.First level electromagnetic compatible sub-circuit includes：Common mode disturbances suppression module, including a common mode inductance, the common mode inductance includes coiling first coil in opposite direction and the second coil, the both ends of the first coil electrically connect with the first power signal line respectively, and the both ends of second coil electrically connect with second source signal wire respectively；DM EMI suppression module, including the first differential mode inductance and the second differential mode inductance, the first end of first differential mode inductance electrically connect with the first end of the first coil, and the first end of second differential mode inductance electrically connects with the first end of second coil.To solve the problems, such as that electromagnetic interference present in TV power supply is larger, reached suppress electromagnetic interference in power circuit ability it is strong and the effect of the dc source of stable performance is provided.
Description
Technical field
The present embodiments relate to electronic circuit technology, more particularly to a kind of electromagnetic compatibility circuit, TV power supply and TV
Machine.
Background technology
As television screen size the more is done the more big, resolution ratio more and more higher, there is higher requirement to power supply, there is provided property
It is an important factor for realizing high-quality display that energy is stable, small large power supply is lost.
The rectifier bridge of conventional rectification filter circuit only can just turn on when input sine wave voltage is close to peak value, result in
The serious non-sine of input current, a large amount of harmonic current compositions are generated, reduce the utilization rate of power network, while had potential dry
Disturb the possibility of other electrical equipment.PFC (Power Factor Correction, PFC) is carried out to input AC electric current
" shaping ", makes input current approximate and input voltage same-phase so that input power factor is close to 1.Therefore, pfc circuit is one
Kind effectively solves the problems, such as the circuit of electric network pollution caused by conventional rectifier circuit.It can be met greatly using non-bridge PFC circuits scheme
The requirement of power, high efficiency and small power attenuation.But high current all in traditional Boost circuit all flows
Rectified bridge, it is excessive to thereby result in the loss of rectifier bridge, and heating is serious.It can reduce conventional rectifier band using non-bridge PFC circuits
The loss come, but bigger difficulty is brought to electromagnetic interference (Electromagnetic Interference, EMI) design,
Make larger electromagnetic interference in TV power supply circuit be present.
The content of the invention
The present invention provides a kind of electromagnetic compatibility circuit, TV power supply and television set, electric present in TV power supply to solve
The problem of magnetic disturbance is larger, reach suppress electromagnetic interference in power circuit ability it is strong and the dc source of stable performance is provided
Purpose.
In a first aspect, the embodiments of the invention provide a kind of electromagnetic compatibility circuit, including at least level electromagnetic compatible electricity
Road, wherein, the first level electromagnetic compatible sub-circuit includes：
Common mode disturbances suppression module, the common mode disturbances suppression module include a common mode inductance, and the common mode inductance includes
Coiling first coil in opposite direction and the second coil, the both ends of the first coil are electrically connected with the first power signal line respectively
Connect, the both ends of second coil electrically connect with second source signal wire respectively；
DM EMI suppression module, the DM EMI suppression module include the first differential mode inductance and the second differential mode inductance,
First differential mode inductance is connected in series with first power signal line, and second differential mode inductance is believed with the second source
Number line is connected in series, and the first end of first differential mode inductance electrically connects with the first end of the first coil, and described second
The first end of differential mode inductance electrically connects with the first end of second coil.
Alternatively, the common mode disturbances suppression module also includes：
First electric capacity, the first end of first electric capacity and first power signal line, and with the first coil
First end electrically connects, the second end of first electric capacity and the second source signal wire, and with the first of second coil
End electrical connection.
Alternatively, described electromagnetic compatibility circuit also includes radiation interference suppression module, the radiation interference suppression module
Including the first magnetic bead and the second magnetic bead；
The first end of first magnetic bead and first power signal line, and be electrically connected with the first end of the first coil
Connect, the second end ground connection of first magnetic bead；
The first end of second magnetic bead and the second source signal wire, and be electrically connected with the first end of second coil
Connect, the second end ground connection of second magnetic bead.
Alternatively, the ground connection is the ground connection by adding magnet ring.
Alternatively, the radiation interference suppression module also includes：
Second electric capacity, second electric capacity are series between first magnetic bead and the ground；
3rd electric capacity, the 3rd electric capacity are series between second magnetic bead and the ground.
Alternatively, in the first level electromagnetic compatible sub-circuit, the second end of first differential mode inductance passes through the first electricity
Source signal input line is electrically connected with the first power supply signal input, and the second end of second differential mode inductance is believed by second source
Number input line electrically connects with second source signal input part；
The first level electromagnetic compatible sub-circuit also includes：4th electric capacity and the 5th electric capacity, the first of the 4th electric capacity
End electrically connects with first power supply signal input, the second end ground connection of the 4th electric capacity, and the first of the 5th electric capacity
End electrically connects with the second source signal input part, the second end ground connection of the 5th electric capacity.
Alternatively, other level electromagnetic compatible sub-circuits in addition to the first level electromagnetic compatible sub-circuit are done including the common mode
Disturb suppression module, and in upper level electromagnetic compatibility sub-circuit first coil the second end, and in next level electromagnetic compatible sub-circuit
First coil first end electrical connection, and in upper level electromagnetic compatibility sub-circuit the second coil the second end, with next stage electricity
The first end electrical connection of second coil in magnetic compatibility sub-circuit.
Alternatively, it is dry also to include the radiation for other level electromagnetic compatible sub-circuits in addition to the first level electromagnetic compatible sub-circuit
Disturb suppression module, and the first end of the first magnetic bead and in same level electromagnetic compatible sub-circuit the in same level electromagnetic compatible sub-circuit
The first end of one coil electrically connects, the first end of the second magnetic bead and same level electromagnetic compatible in same level electromagnetic compatible sub-circuit
The first end electrical connection of second coil in circuit.
Alternatively, other level electromagnetic compatible sub-circuits in addition to the first level electromagnetic compatible sub-circuit also include the described first electricity
Hold, and the described in the first end of the first electric capacity described in same level electromagnetic compatible sub-circuit and same level electromagnetic compatible sub-circuit
The first end electrical connection of one coil, the second end of the first electric capacity described in same level electromagnetic compatible sub-circuit and same one-level electromagnetism are simultaneous
Hold the first end electrical connection of the second coil described in sub-circuit.
Alternatively, the series of the electromagnetic compatibility sub-circuit is 4 grades.
Alternatively, described electromagnetic compatibility circuit also includes：Fuse, the fuse are series at the second source letter
Number between input and the 5th electric capacity, and the second source signal wire is live wire.
Any described electromagnetic compatibility circuit of second aspect, a kind of TV power supply, including the embodiment of the present invention, Yi Jishuan
Boost Bridgeless power factor circuit for rectifying；
The output end of the input and the electromagnetic compatibility circuit of double Boost Bridgeless power factors circuit for rectifying is electrically connected
Connect.
Alternatively, double Boost Bridgeless power factors circuit for rectifying include：First inductance and the first diode, it is described
First inductance and first Diode series are on first power signal line, and the anode of first diode and institute
The electrical connection of the first inductance is stated, the negative electrode of first diode electrically connects with the first output signal line；
3rd diode, the both ends of the 3rd diode respectively with double Boost Bridgeless power factors circuit for rectifying
The second output signal line and the second source signal wire electrical connection, and the negative electrode of the 3rd diode with described second electricity
Source signal line electrically connects；
First switch pipe, the input and output end of the first switch pipe respectively with the anode of first diode and
The second output signal line electrical connection；
6th electric capacity, the both ends of the 6th electric capacity respectively with first output signal line and second output signal
Line electrically connects；
Second inductance and the second diode, second inductance and second Diode series are believed in the second source
On number line, and the anode of second diode electrically connects with second inductance, the negative electrode of second diode with it is described
First output signal line electrically connects；
4th diode, the both ends of the 4th diode respectively with second output signal line and first power supply
Signal wire electrically connects, and the negative electrode of the 4th diode electrically connects with first power signal line；
Second switch pipe, the input and output end of the second switch pipe respectively with the anode of second diode and
The second output signal line electrical connection.
Alternatively, simultaneously the first ceramic disc capacitor, and described between the input of the first switch pipe and output end
Between the input and output end of second switch pipe and the second ceramic disc capacitor.
Alternatively, the 3rd diode and the described 4th 2 in double Boost Bridgeless power factors circuit for rectifying
Pole pipe is silicon carbide diode.
The third aspect, the embodiment of the present invention additionally provide a kind of television set, including any described electricity of the embodiment of the present invention
Depending on power supply.
The embodiments of the invention provide one kind to include an at least level electromagnetic compatible sub-circuit electromagnetic compatibility circuit, wherein, the
One level electromagnetic compatible sub-circuit includes common mode disturbances suppression module and DM EMI suppression module.Solve in TV power supply and exist
Electromagnetic interference it is larger the problem of, realize suppress electromagnetic interference in power circuit ability it is strong and the straight of stable performance is provided
Flow the effect of power supply.
Brief description of the drawings
Fig. 1 is a kind of circuit diagram of electromagnetic compatibility circuit provided in an embodiment of the present invention；
Fig. 2 is the circuit diagram of another electromagnetic compatibility circuit provided in an embodiment of the present invention；
Fig. 3 is a kind of circuit diagram of double Boost non-bridge PFC circuits provided in an embodiment of the present invention.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Fig. 1 show a kind of circuit diagram of electromagnetic compatibility circuit provided in an embodiment of the present invention, and the present embodiment is applicable to
Large power supply occasion, the electromagnetic compatibility circuit are specific as follows：
Including an at least level electromagnetic compatible sub-circuit, wherein, the first level electromagnetic compatible sub-circuit 110 includes：
Common mode disturbances suppression module 111, common mode disturbances suppression module 111 include a common mode inductance LF2, common mode inductance LF2
Both ends including coiling first coil N1 in opposite direction and the second coil N2, first coil N1 respectively with the first power signal line
Electrical connection, the second coil N2 both ends electrically connect with second source signal wire respectively；
DM EMI suppression module 112, DM EMI suppression module 112 include the first differential mode inductance L6 and the second differential mode electricity
Feel L5, the first differential mode inductance L6 is connected in series with the first power signal line, and the second differential mode inductance is connected with second source signal wire
Connection, and the first differential mode inductance L6 first end electrically connects with first coil N1 first end, the first of the first differential mode inductance L5
End electrically connects with the second coil N2 first end.
The operation principle of first level electromagnetic compatible sub-circuit 110 is：Disturb electromagnetic field it is online-ground between produce common mode electricity
Stream, common mode current produce differential mode voltage in load, cause interference, and here it is the earth loop interference of common mode.Believe in the first power supply
The first coil N1 and second in opposite direction of coiling in common mode inductance LF2 is connected in series respectively on number line and second source signal wire
Coil N2.When the normal current in circuit flows through common mode inductance LF2, electric current produces instead in the inductance coil of same-phase coiling
To magnetic field and cancel out each other, now normal current is mainly influenceed by coil resistance, when there is common mode current flowing through coil, by
In the same tropism of common mode current, magnetic field in the same direction can be produced in coil and increases the induction reactance of coil, coil is shown as high resistant
It is anti-, stronger damping is produced, the effect for making caused common mode disturbances in common mode current decay, effective suppression circuit is reached with this
Fruit.
In addition, interference electromagnetic field it is online-line between produce differential-mode current, interference is caused in load, here it is differential mode to do
Disturb.It is connected in series the first differential mode inductance L6 and the second differential mode inductance respectively on the first power signal line and second source signal wire
L5.First differential mode inductance L6 and the second differential mode inductance L5 preferably can be that sensibility reciprocal is identical, differential mode inductance of positional symmetry.First is poor
Mould inductance L6 and the second differential mode inductance L5 are big to the induction reactance of differential mode High-frequency Interference, so as to which caused differential mode is done in effective suppression circuit
Disturb.
The technical scheme of the present embodiment is a kind of including at least level electromagnetic compatible sub-circuit electromagnetic compatibility electricity by providing
Road, wherein, the first level electromagnetic compatible sub-circuit includes common mode disturbances suppression module and DM EMI suppression module.Solves TV
The problem of electromagnetic interference is larger present in power supply, realize suppress electromagnetic interference in power circuit ability is strong and offer property
The effect in energy galvanic current source.
Specifically, on the basis of above-described embodiment, common mode disturbances suppression module 111 also includes：
First electric capacity CX1, the first electric capacity CX1 first end and the first power signal line, and with the first of first coil N1
End electrical connection, the first electric capacity CX1 the second end and second source signal wire, and electrically connected with the second coil N2 first end.
Common mode inductance LF2 both ends electrically connect the first electric capacity CX1, can preferably filter out electromagnetic interference.
On the basis of above-described embodiment, electromagnetic compatibility circuit also includes radiation interference suppression module 113, radiation interference suppression
Molding block 113 includes the first magnetic bead LB28 and the second magnetic bead LB27；
First magnetic bead LB28 first end and the first power signal line, and electrically connected with first coil N1 first end, the
One magnetic bead LB28 the second end ground connection；
Second magnetic bead LB27 first end and second source signal wire, and electrically connected with the second coil N2 first end, the
Two magnetic bead LB27 the second end ground connection.
Radiation interference suppression module 113 also includes：
Second electric capacity CY11, the second electric capacity CY11 are series between the first magnetic bead LB28 and ground；
3rd electric capacity CY9, the 3rd electric capacity CY9 are series between the second magnetic bead LB27 and ground.
Caused voltage and/or current interference signal are transmitted to another circuitry by Space Coupling in power circuit,
Miscellaneous equipment circuit is set to produce unwanted voltage and/or electric current, resulting interference is referred to as radiation interference.Pressed down by radiation interference
Molding block 113 sets the first magnetic bead LB28, the second magnetic bead LB27 and the second electric capacity CY11, the 3rd electric capacity CY9 effectively to suppress
Radiation interference caused by power circuit.
In addition, machine metal shell good earth and ground connection is used to suppress for the ground connection by adding magnet ring
High-frequency noise on ground wire, effectively suppress radiation interference caused by power circuit.
On the basis of above-described embodiment, in the first level electromagnetic compatible sub-circuit 110, the first differential mode inductance L6 the second end
Electrically connected by the first power supply signal input line with the first power supply signal input, the first differential mode inductance L5 the second end passes through
Two power supply signal input lines electrically connect with second source signal input part；
First level electromagnetic compatible sub-circuit 110 also includes：4th electric capacity CY3 and the 5th electric capacity CY4, the 4th electric capacity CY3's
First end electrically connects with the first power supply signal input, the 4th electric capacity CY3 the second end ground connection, the 5th electric capacity CY4 first end
Electrically connected with second source signal input part, the 5th electric capacity CY4 the second end ground connection.Power circuit generation can further be suppressed
Electromagnetic interference.
Fig. 2 show the circuit diagram of another electromagnetic compatibility circuit provided in an embodiment of the present invention, and electromagnetic compatibility circuit removes
Other level electromagnetic compatible sub-circuits outside first level electromagnetic compatible sub-circuit 110 include common mode disturbances suppression module 111, and on
In one level electromagnetic compatible sub-circuit in first coil N1 the second end, with next level electromagnetic compatible sub-circuit first coil N1
One end electrically connect, and in upper level electromagnetic compatibility sub-circuit the second coil N2 the second end, with next level electromagnetic compatible electricity
Second coil N2 first end electrical connection in road.
For example, the output end of the first level electromagnetic compatible sub-circuit and the input of the second pole electromagnetic compatibility sub-circuit are electrically connected
Connect, the first coil N1 of the common mode inductance LF2 in the first level electromagnetic compatible sub-circuit the second end, with the second level electromagnetic compatible
The first end electrical connection of common mode inductance LF3 first coils N1 in circuit, and the common mode in the first level electromagnetic compatible sub-circuit
The second coils of inductance LF2 N2 the second end, with the second coils of common mode inductance LF3 N2 in the second level electromagnetic compatible sub-circuit
One end electrically connects.
Other level electromagnetic compatible sub-circuits of electromagnetic compatibility circuit in addition to the first level electromagnetic compatible sub-circuit also include radiation
AF panel module 113, and the first end of the first magnetic bead and same level electromagnetic compatible electricity in same level electromagnetic compatible sub-circuit
First coil N1 first end electrical connection in road, in same level electromagnetic compatible sub-circuit the first end of the second magnetic bead with one-level electricity
Second coil N2 first end electrical connection in magnetic compatibility sub-circuit.
Other level electromagnetic compatible sub-circuits of electromagnetic compatibility circuit in addition to the first level electromagnetic compatible sub-circuit 110 also include the
One electric capacity CX, and in same level electromagnetic compatible sub-circuit the in the first electric capacity CX first end and same level electromagnetic compatible sub-circuit
One coil N1 first end electrically connects, and the first electric capacity CX the second end and same one-level electromagnetism are simultaneous in same level electromagnetic compatible sub-circuit
Hold the first end electrical connection of the second coil N2 in sub-circuit.
In a power, because the main body of rear class non-bridge PFC circuits is all after high-frequency inductor, relative to the electricity of the earth
Position is to change at a high speed, the problem of producing very big electromagnetic interference.Meanwhile the switching tube and diode of non-bridge PFC circuits exist
To be produced during work it is a large amount of it is poor touch interference, and DM EMI signal and common mode interference signal can be converted mutually.The present embodiment is adopted
DM EMI is filtered out with one-level DM EMI suppression module, is disturbed using multistage common mode disturbances suppression module filtering common mode, so as to
Reach the effect for filtering out stronger electromagnetic interference.
On the basis of above-described embodiment, the series of the electromagnetic compatibility sub-circuit of electromagnetic compatibility circuit is 4 grades.Use one
Level differential mode AF panel module filters out DM EMI, is disturbed using 4 grades of common mode disturbances suppression module filtering common modes, so as to which economy has
Filter out electromagnetic interference caused by rear class non-bridge PFC circuits to effect.
On the basis of above-described embodiment, electromagnetic compatibility circuit also includes：Fuse F4, fuse F4 are series at the second electricity
Between source signal input and the 5th electric capacity CY4, and second source signal wire is live wire.Fuse F4 series connection is connected into live wire letter
Number input.Fuse F4 in power circuit just when electric current is too high, cut off by fuse F4 temperature rise, its own fusing
Electric current, it can be run with protection power source circuit safety, play overload protective function.
The present embodiment can be based on above-described embodiment, there is provided a kind of TV power supply, the TV power supply include：This hair
The electromagnetic compatibility circuit that bright any embodiment is provided, and double Boost non-bridge PFC circuits.Double Boost non-bridge PFC circuits
Input electrically connects with the output end of electromagnetic compatibility circuit.
Fig. 3 show a kind of circuit diagram of double Boost non-bridge PFC circuits provided in an embodiment of the present invention, and double Boost are without bridge
Pfc circuit includes：
First inductance L1 and the first diode D1, the first inductance L1 and the first diode D1 are series at the first power signal line
On, and the anode of the first diode electrically connects with the first inductance L1, the first diode D1 negative electrode and the first output signal line electricity
Connection；
3rd diode D3, the 3rd diode D3 both ends the second output signal with double Boost non-bridge PFC circuits respectively
Line and the electrical connection of second source signal wire, and the 3rd diode D3 negative electrode electrically connects with second source signal wire；
First switch pipe VT1, first switch pipe VT1 input and output end respectively with the first diode D1 anode and
Second output signal line electrically connects；
6th electric capacity C6, the 6th electric capacity C6 both ends are electrically connected with the first output signal line and the second output signal line respectively
Connect；
Second inductance L2 and the second diode D2, the second inductance L2 and the second diode D2 are series at second source signal wire
On, and the anode of the second diode electrically connects the negative electrode and the first output signal line electricity of the second diode D2 with the second inductance
Connection；
4th diode D4, the 4th diode D4 both ends are electric with the second output signal line and the first power signal line respectively
Connection, and the 4th diode D4 negative electrode electrically connects with the first power signal line；
Second switch pipe VT2, second switch pipe VT2 input and output end respectively with the second diode D2 anode and
Second output signal line electrically connects.
The course of work of double Boost non-bridge PFC circuits is：In the positive half cycle of input input ac voltage, the three or two pole
Pipe D3 is turned on.If first switch pipe VT1 is open-minded, the first inductance L1 energy storage, while the voltage output on the 6th electric capacity C6, to load
Power supply.At the same time, second switch pipe VT2 can be opened, increases loaded continuous current circuit, due to second switch pipe VT2 resistance
It is anti-to be less than the 3rd diode D3, there is more electric current to be flowed through from second switch pipe VT2.If first switch pipe VT1 is turned off, input
Input voltage and the first inductance L1 charged jointly to the 6th electric capacity C6, and power to the load.In input input ac voltage
During negative half period, the course of work is similar.Thus, in a work period of double Boost non-bridge PFC circuits, only in switching tube
During shut-off, electric current all can just flow through from low speed commutation diode, reduce the use of low speed commutation diode, effectively reduce
The heating of circuit, improves power consumption efficiency.Meanwhile the circuit can eliminate the need for larger fin, reduce power panel
Size, adapt to a variety of modeling requirements such as television set narrow frame.
Double Boost non-bridge PFC circuits in the course of the work, during the positive half cycle of input input ac voltage, second source letter
Number line is with being electrically connected to ground；During input input ac voltage negative half period, the first power signal line is with being electrically connected to ground.Can have
Effect is avoided in input AC negative half period, the electromagnetic interference that second source signal wire is connected to the electrical voltage point of high frequency bounce and brought
The problem of larger.Reduce the electromagnetic interference in non-bridge PFC circuits, so as to reduce the suppression series of electromagnetic compatibility circuit, subtract
The number of elements of electromagnetic interference circuit is lacked.
The control model of double Boost non-bridge PFC circuits is continuous conduction mode (Continuous Conduction
Mode, CCM).Using Voltage loop sample input and output voltage, by the reference current of multiplier calculating current ring, then by with
The actual current waveform of sampling is compared, and produces the control signal of switching tube, so as to realize the correction to current waveform.Example
Such as, the power factor correction chip UCC28070 of TI companies can be used to be controlled double Boost non-bridge PFC circuits.
On the basis of above-described embodiment, in the first switch pipe VT1 of double Boost non-bridge PFC circuits input and defeated
Go out between end and between the first ceramic disc capacitor C1, and second switch pipe VT2 input and output end and the second ceramics
Electric capacity C2.Caused high-frequency noise during so as to absorb by switching tube speed-sensitive switch, reduce radiation interference.
On the basis of above-described embodiment, the 3rd diode D3 and the 4th diode D4 in double Boost non-bridge PFC circuits
For silicon carbide diode.Using silicon carbide diode without reverse recovery time, caused by reducing during Reverse recovery
Big reverse current can produce extra loss and disturb the risk of circuit.
The present embodiment can be based on above-described embodiment, there is provided a kind of television set, the television set include the present invention and appointed
The TV power supply that meaning embodiment is provided.Above-mentioned television set possesses the included corresponding functional module of TV power supply and beneficial to effect
Fruit.
Pay attention to, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (16)
- A kind of 1. electromagnetic compatibility circuit, it is characterised in that including an at least level electromagnetic compatible sub-circuit, wherein, first order electromagnetism Compatible sub-circuit includes：Common mode disturbances suppression module, the common mode disturbances suppression module include a common mode inductance, and the common mode inductance includes coiling First coil in opposite direction and the second coil, the both ends of the first coil electrically connect with the first power signal line respectively, institute The both ends for stating the second coil electrically connect with second source signal wire respectively；DM EMI suppression module, the DM EMI suppression module includes the first differential mode inductance and the second differential mode inductance, described First differential mode inductance is connected in series with first power signal line, second differential mode inductance and the second source signal wire It is connected in series, and the first end of first differential mode inductance electrically connects with the first end of the first coil, second differential mode The first end of inductance electrically connects with the first end of second coil.
- 2. electromagnetic compatibility circuit according to claim 1, it is characterised in that the common mode disturbances suppression module also includes：First electric capacity, the first end of first electric capacity and first power signal line, and with the first of the first coil End electrical connection, the second end of first electric capacity and the second source signal wire, and it is electric with the first end of second coil Connection.
- 3. electromagnetic compatibility circuit according to claim 1, it is characterised in that described also including radiation interference suppression module Radiation interference suppression module includes the first magnetic bead and the second magnetic bead；The first end of first magnetic bead and first power signal line, and electrically connected with the first end of the first coil, The second end ground connection of first magnetic bead；The first end of second magnetic bead and the second source signal wire, and electrically connected with the first end of second coil, The second end ground connection of second magnetic bead.
- 4. electromagnetic compatibility circuit according to claim 3, it is characterised in that the ground connection is the ground wire by adding magnet ring Ground connection.
- 5. electromagnetic compatibility circuit according to claim 3, it is characterised in that the radiation interference suppression module also includes：Second electric capacity, second electric capacity are series between first magnetic bead and the ground；3rd electric capacity, the 3rd electric capacity are series between second magnetic bead and the ground.
- 6. electromagnetic compatibility circuit according to claim 3, it is characterised in that in the first level electromagnetic compatible sub-circuit, Second end of first differential mode inductance is electrically connected by the first power supply signal input line with the first power supply signal input, described Second end of the second differential mode inductance is electrically connected by second source signal input line with second source signal input part；The first level electromagnetic compatible sub-circuit also includes：4th electric capacity and the 5th electric capacity, the first end of the 4th electric capacity with First power supply signal input electrical connection, the second end ground connection of the 4th electric capacity, the first end of the 5th electric capacity with The second source signal input part electrical connection, the second end ground connection of the 5th electric capacity.
- 7. electromagnetic compatibility circuit according to claim 3, it is characterised in that its in addition to the first level electromagnetic compatible sub-circuit His level electromagnetic compatible sub-circuit includes the common mode disturbances suppression module, and first coil in upper level electromagnetic compatibility sub-circuit The second end, electrically connected with the first end of first coil in next level electromagnetic compatible sub-circuit, and upper level electromagnetic compatibility Second end of the second coil in circuit, is electrically connected with the first end of the second coil in next level electromagnetic compatible sub-circuit.
- 8. electromagnetic compatibility circuit according to claim 7, it is characterised in that its in addition to the first level electromagnetic compatible sub-circuit His level electromagnetic compatible sub-circuit also includes the radiation interference suppression module, and the first magnetic bead in same level electromagnetic compatible sub-circuit First end electrically connected with the first end of first coil in same level electromagnetic compatible sub-circuit, in same level electromagnetic compatible sub-circuit The first end of second magnetic bead electrically connects with the first end of the second coil in same level electromagnetic compatible sub-circuit.
- 9. electromagnetic compatibility circuit according to claim 7, it is characterised in that its in addition to the first level electromagnetic compatible sub-circuit His level electromagnetic compatible sub-circuit also includes first electric capacity, and of the first electric capacity described in same level electromagnetic compatible sub-circuit One end electrically connects with the first end of first coil described in same level electromagnetic compatible sub-circuit, in same level electromagnetic compatible sub-circuit Second end of first electric capacity electrically connects with the first end of the second coil described in same level electromagnetic compatible sub-circuit.
- 10. electromagnetic compatibility circuit according to claim 1, it is characterised in that the series of the electromagnetic compatibility sub-circuit is 4 Level.
- 11. electromagnetic compatibility circuit according to claim 6, it is characterised in that also include：Fuse, the fuse string It is coupled between the second source signal input part and the 5th electric capacity, and the second source signal wire is live wire.
- A kind of 12. TV power supply, it is characterised in that including：Electromagnetic compatibility circuit as described in claim any one of 1-11, with And double Boost Bridgeless power factors circuit for rectifying；The input of double Boost Bridgeless power factors circuit for rectifying electrically connects with the output end of the electromagnetic compatibility circuit.
- 13. TV power supply according to claim 12, it is characterised in that double Boost Bridgeless power factors correction electricity Road includes：First inductance and the first diode, first inductance and first Diode series are believed in first power supply On number line, and the anode of first diode electrically connects with first inductance, the negative electrode and first of first diode Output signal line electrically connects；3rd diode, the both ends of the 3rd diode respectively with double Boost Bridgeless power factors circuit for rectifying Two output signal lines and second source signal wire electrical connection, and the negative electrode of the 3rd diode is believed with the second source The electrical connection of number line；First switch pipe, the input and output end of the first switch pipe respectively with the anode of first diode and described Second output signal line electrically connects；6th electric capacity, the both ends of the 6th electric capacity are electric with first output signal line and second output signal line respectively Connection；Second inductance and the second diode, second inductance and second Diode series are in the second source signal wire On, and the anode of second diode electrically connects with second inductance, the negative electrode of second diode and described first Output signal line electrically connects；4th diode, the both ends of the 4th diode respectively with second output signal line and first power supply signal Line electrically connects, and the negative electrode of the 4th diode electrically connects with first power signal line；Second switch pipe, the input and output end of the second switch pipe respectively with the anode of second diode and described Second output signal line electrically connects.
- 14. TV power supply according to claim 13, it is characterised in that input and output in the first switch pipe First ceramic disc capacitor in parallel between end, and the second ceramics electricity in parallel between the input of the second switch pipe and output end Hold.
- 15. TV power supply according to claim 13, it is characterised in that double Boost Bridgeless power factors correction electricity The 3rd diode and the 4th diode in road are silicon carbide diode.
- 16. a kind of television set, it is characterised in that including the TV power supply as described in claim any one of 12-15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710736002.0A CN107359790A (en) | 2017-08-24 | 2017-08-24 | A kind of electromagnetic compatibility circuit, TV power supply and television set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710736002.0A CN107359790A (en) | 2017-08-24 | 2017-08-24 | A kind of electromagnetic compatibility circuit, TV power supply and television set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107359790A true CN107359790A (en) | 2017-11-17 |
Family
ID=60290113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710736002.0A Pending CN107359790A (en) | 2017-08-24 | 2017-08-24 | A kind of electromagnetic compatibility circuit, TV power supply and television set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107359790A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208632A (en) * | 2019-07-09 | 2019-09-06 | 深圳创维数字技术有限公司 | A kind of method, system and storage medium for electromagnetic compatibility testing |
| CN112671381A (en) * | 2020-12-11 | 2021-04-16 | 华东师范大学 | Broadband radio frequency switch and edge optimization method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931319A (en) * | 2009-06-08 | 2010-12-29 | 康舒科技股份有限公司 | Non-bridge type power factor correction circuit |
| CN203645532U (en) * | 2013-12-16 | 2014-06-11 | 重庆长安汽车股份有限公司 | Electromagnetic compatible filter circuit of high voltage part for new energy vehicle |
| CN203933387U (en) * | 2014-06-16 | 2014-11-05 | 邯郸美的制冷设备有限公司 | A kind of for suppressing filter circuit and the air conditioner of electromagnetic interference |
-
2017
- 2017-08-24 CN CN201710736002.0A patent/CN107359790A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931319A (en) * | 2009-06-08 | 2010-12-29 | 康舒科技股份有限公司 | Non-bridge type power factor correction circuit |
| CN203645532U (en) * | 2013-12-16 | 2014-06-11 | 重庆长安汽车股份有限公司 | Electromagnetic compatible filter circuit of high voltage part for new energy vehicle |
| CN203933387U (en) * | 2014-06-16 | 2014-11-05 | 邯郸美的制冷设备有限公司 | A kind of for suppressing filter circuit and the air conditioner of electromagnetic interference |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208632A (en) * | 2019-07-09 | 2019-09-06 | 深圳创维数字技术有限公司 | A kind of method, system and storage medium for electromagnetic compatibility testing |
| CN112671381A (en) * | 2020-12-11 | 2021-04-16 | 华东师范大学 | Broadband radio frequency switch and edge optimization method thereof |
| CN112671381B (en) * | 2020-12-11 | 2023-02-28 | 华东师范大学 | Broadband radio frequency switch and edge optimization method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104702093B (en) | Bridgeless power factor circuit correcting circuit | |
| CN105790614B (en) | A kind of non-bridge PFC switching power circuit | |
| CN105305855B (en) | Three-phase isolation type bidirectional AC-DC converter and its control method | |
| CN201436615U (en) | Single-phase bridgeless power factor correction circuit | |
| TW201438387A (en) | Filter device, power converter and common mode noises suppression method | |
| CN103580468B (en) | Passive Power Factor Correction Circuit | |
| CN104638891B (en) | A kind of common-mode voltage suppression system for photovoltaic combining inverter | |
| Basu et al. | A novel common power factor correction scheme for homes and offices | |
| CN206100548U (en) | Electrical power generating system based on ARM control system realizes drive of single -stage PFCLED | |
| CN107359790A (en) | A kind of electromagnetic compatibility circuit, TV power supply and television set | |
| CN110299859A (en) | A kind of Three phase voltage-source recitifier | |
| CN206585481U (en) | PFC PFC rectification circuits, electromagnetic heating system and electromagnetic oven | |
| CN105915033A (en) | LCL filterer passive resonance damping circuit and method | |
| CN105958809A (en) | Filter with coupled inductor and parameter determining method of filter | |
| CN103856176A (en) | LCL filter with coupled inductors | |
| CN104702092B (en) | The circuit of power factor correction of power supply changeover device | |
| CN203747679U (en) | Power adapter circuit resistant to high-frequency interference | |
| CN202906742U (en) | Fly-back power source with power factor correction function | |
| CN108649816A (en) | A kind of current rectifying and wave filtering circuit | |
| CN105429452A (en) | Common-mode rejection dual-Boost bridgeless PFC converter | |
| CN2476134Y (en) | On-off power supply single phase input filter | |
| Suzuki et al. | Experimental studies on active and passive PFC circuits | |
| CN206628990U (en) | PFC PFC rectification circuits, electromagnetic heating system and electromagnetic oven | |
| CN209299137U (en) | Power factor correction circuit and equipment | |
| CN206164353U (en) | Electricity -saving device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171117 |
|
| RJ01 | Rejection of invention patent application after publication |