CN104467388B - Power supply based on the conduction type harmonics restraint of PFC - Google Patents
Power supply based on the conduction type harmonics restraint of PFC Download PDFInfo
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- CN104467388B CN104467388B CN201410735061.2A CN201410735061A CN104467388B CN 104467388 B CN104467388 B CN 104467388B CN 201410735061 A CN201410735061 A CN 201410735061A CN 104467388 B CN104467388 B CN 104467388B
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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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
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- Power Engineering (AREA)
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Abstract
The present invention provides a kind of power supply of the conduction type harmonics restraint based on PFC, and which includes rectifier bridge, controller, Boost circuit, filter circuit, accessory power supply, current-limiting circuit, filtering energy storage, first voltage detection circuit, current detection circuit, second voltage detection circuit；Rectifier bridge one end is electrically connected with AC power, and its other end is electrically connected with Boost circuit, filter circuit, current-limiting circuit, filtering energy storage successively；Controller is electrically connected with one end of accessory power supply, first voltage detection circuit, current detection circuit, second voltage detection circuit respectively；The accessory power supply other end is connected electrically between filter circuit and current-limiting circuit, from the end power taking of power supply intergrade VR；The other end of first voltage detection circuit is connected electrically between rectifier bridge and Boost circuit；The other end of current detection circuit is electrically connected with Boost circuit.
Description
Technical field
The present invention relates to the power technique fields of harmonics restraint, more particularly to a kind of conduction type harmonics restraint based on PFC
Power supply.
Background technology
With the development of Power Electronic Technique, increasing power electronic equipment accesses operation of power networks.These equipment
Input side mostly adopts bridge rectifier filter circuit, and its diode is only just led when input voltage is more than VD
Logical, the time is very short.Therefore, input current is peaked wave, causes AC input current Severe distortion, thus produces substantial amounts of harmonic wave
Injection electrical network.Mains by harmonics electric current not only cause transformer and supply line overheated, affect the performance of electrical equipment, and produce electromagnetism
Interference, affects other electronic equipments normally to run.
At present, the main method of suppression harmonic wave has passive filtering and two kinds of active correction.Passive filtering be exactly in main circuit
In seal in LC wave filter, its filter effect is relevant with electric network impedance, frequency, bad dynamic performance, also exist in parallel with electrical network generation
Resonance, the shortcomings of wave filter volume is big.Active correction is between rectifier bridge and filter capacitor plus one-level PFC ring
Section so that input current waveform tracks input voltage waveform, reduces the humorous of input current while improving electrical source power factor
Ripple content.
For meeting the index of correlation of the military electromagnetic compatibility standard of national military standard GJB151, current harmonic suppression technique passes through
The energy storage inductor amount reduced in Boost circuit is taken in active power factor corrector (PFC), increases its switch operating frequency,
Reduce the measures such as the front end direct current filtering capacitance of pfc circuit, Zero-crossing Distortion and the tip distortion of input current can be reduced, but
While can also increase inrush current, reduce stability of power supply and reliability.
Content of the invention
Method inrush current for solving the suppression harmonic wave of prior art is big, the stability of power supply and poor reliability
Problem, it is necessary to which a kind of power supply of the conduction type harmonics restraint based on PFC is provided.
A kind of power supply of the conduction type harmonics restraint based on PFC, it include rectifier bridge, controller, Boost circuit,
Filter circuit, accessory power supply, current-limiting circuit, filtering energy storage, first voltage detection circuit, current detection circuit, second voltage inspection
Slowdown monitoring circuit；
Rectifier bridge one end is electrically connected with AC power, its other end successively with Boost circuit, filter circuit, current limliting
Circuit, filtering energy storage electrical connection；
Controller detects circuit with accessory power supply, first voltage detection circuit, current detection circuit, second voltage respectively
One end electrically connects；The accessory power supply other end is connected electrically between filter circuit and current-limiting circuit, from the end power taking of power supply intergrade VR；
The other end of first voltage detection circuit is connected electrically between rectifier bridge and Boost circuit；Current detection circuit another
End is electrically connected with Boost circuit；
Rectifier bridge is used for be used for for the alternating current of input switching to unidirectional direct current, and by direct current electricity output to Boost
Booster circuit；
Boost circuit is used for raising direct current after the conversion that rectifier bridge is exported；
Filter circuit is used for filtering the ripple in rectifier bridge output DC voltage, and the direct current electricity output after filtration is given
Current-limiting circuit；
Accessory power supply is used for from the end power taking of power supply intergrade VR, is that controller provides primary power, power supply intergrade VR end
Between filter circuit and current-limiting circuit；
Current-limiting circuit is used for the inrush current suppressed in accessory power supply；
Filtering energy storage is used for electric charge of the storage after current-limiting circuit current limliting, powers to external loading；
The DC voltage value that first voltage detection circuit is used for exporting rectifier bridge is converted into first voltage amount and exports
To controller；
The DC current flow value that current detection circuit is used for exporting rectifier bridge is converted into second voltage amount and exports to control
Device processed；
Second voltage detection circuit is used for the DC voltage of filtering energy storage output to be converted into tertiary voltage amount and exported
To controller；
Controller is used for receiving first voltage amount, second voltage amount, tertiary voltage amount, and according to first voltage amount, second
Voltage, tertiary voltage amount are adjusted to the power of the conduction type harmonics restraint based on PFC.
The power supply of the conduction type harmonics restraint based on PFC that the present invention is provided, by using controller and with reference to Boost liter
Input AC electricity is converted into direct current by volt circuit so that input current waveform tracks input voltage waveform, and is reduced with this defeated
Enter the harmonic content in electric current.Input AC electricity enters the power of controller and Boost circuit composition after rectifier bridge
Factor corrector, AC conversion is become direct current.The auxiliary electricity of controller is first from the pre- steady level VR end power taking of power supply, to be controlled
From on the inductance of Boost circuit using ancillary coil and high-frequency rectification circuit power taking after device normal work.Pre- steady level VR end
Powering load after filter bank energy is entered after current-limiting circuit.
Meanwhile, detect that circuit, current detection circuit, second voltage detect that circuit will be input into electricity using by first voltage
Pressure, input current and output voltage are input in controller after being converted into voltage.
A kind of advantage of the conduction type harmonics restraint power supply based on PFC of the present invention is：
1) electrical source power factor is improve, while reducing the harmonic content of mains input current.
2) pass through current-limiting circuit, inrush current is restrained effectively, improves the reliability of Switching Power Supply.
Description of the drawings
Fig. 1 is the structured flowchart of the power supply of the conduction type harmonics restraint based on PFC that embodiment of the present invention is provided；
Fig. 2 is the circuit diagram of current-limiting circuit in Fig. 1；
Fig. 3 is the circuit diagram of flow equalizing circuit in Fig. 1；
Fig. 4 a, Fig. 4 b, Fig. 4 c are the circuit diagrams of overvoltage crowbar in Fig. 1.
In accompanying drawing：1- rectifier bridge, 2- controller, 3-Boost booster circuit, 4- filter circuit, 5- accessory power supply, 6- current limliting
Circuit, 7- filtering energy storage, 8- first voltage detection circuit, 9- current detection circuit, 10- second voltage detection circuit, 11- overvoltage
Protection circuit, 12- flow equalizing circuit, 13- power sense circuit, 14- overheating protection circuit.
Specific embodiment
As shown in figure 1, the embodiment of the present invention provides a kind of power supply of the conduction type harmonics restraint based on PFC, which includes whole
Stream bridge 1, controller 2, Boost circuit 3, filter circuit 4, accessory power supply 5, current-limiting circuit 6, filtering energy storage 7, first voltage
Detection circuit 8, current detection circuit 9, second voltage detection circuit 10.
1 one end of rectifier bridge is electrically connected with AC power, its other end successively with Boost circuit 2, filter circuit 4, limit
Current circuit 6, filtering energy storage 7 are electrically connected.
Controller 2 detects circuit 8, current detection circuit 9, second voltage detection electricity respectively with accessory power supply 5, first voltage
One end electrical connection on road 10；5 other end of accessory power supply is connected electrically between filter circuit 4 and current-limiting circuit 6, from power supply intergrade
The power taking of VR end；The other end of first voltage detection circuit 8 is connected electrically between rectifier bridge 1 and Boost circuit 3；Electric current is examined
The other end of slowdown monitoring circuit 9 is electrically connected with Boost circuit 3.
Rectifier bridge 1 is used for be used for for the alternating current of input switching to unidirectional direct current, and by direct current electricity output to Boost
Booster circuit 3.
Boost circuit 3 is used for raising direct current after the conversion that rectifier bridge 1 is exported.
Filter circuit 4 is used for filtering the ripple that rectifier bridge 1 is exported in DC voltage, and by the direct current electricity output after filtration
To current-limiting circuit 6.
Accessory power supply 5 is used for from the end power taking of power supply intergrade VR, is that controller 2 provides primary power, power supply intergrade VR
End is between filter circuit 4 and current-limiting circuit 6.
Current-limiting circuit 6 is used for the inrush current suppressed in accessory power supply 5.
Filtering energy storage 7 is used for electric charge of the storage after 6 current limliting of current-limiting circuit, powers to external loading.
First voltage detection circuit 8 is used for the DC voltage value that exports rectifier bridge 1 and is converted into first voltage amount defeated
Go out to controller 2.
Current detection circuit 9 be used for DC current flow value that rectifier bridge 1 is exported be converted into second voltage amount and export to
Controller 2.
Second voltage detection circuit 10 is used for for the filtering DC voltage that exports of energy storage 7 being converted into tertiary voltage amount defeated
Go out to controller 2.
Controller 2 is used for receiving first voltage amount, second voltage amount, tertiary voltage amount, and according to first voltage amount, second
Voltage, tertiary voltage amount are adjusted to the power of the conduction type harmonics restraint based on PFC.
The power supply of the conduction type harmonics restraint based on PFC provided in an embodiment of the present invention, by using controller 2 and combining
Input AC electricity is converted into direct current by Boost circuit 3 so that input current waveform tracking input voltage waveform, and with
This reduces the harmonic content in input current.Input AC electricity enters controller 2 and Boost circuit after rectifier bridge 1
The power factor corrector of 3 compositions, AC conversion is become direct current.The auxiliary electricity of controller 2 is first from pre- steady level VR of power supply
End power taking, from the inductance of Boost circuit 3 using ancillary coil and high-frequency rectification circuit after 2 normal work of device to be controlled
Power taking.Pre- steady level VR end enters powering load after filter bank energy 7 after current-limiting circuit 6.
Meanwhile, detect that circuit 8, current detection circuit 9, second voltage detect that circuit 10 will input using by first voltage
Voltage, input current and output voltage are input to after being converted into voltage in controller 2.
A kind of advantage of the conduction type harmonics restraint power supply based on PFC of the present invention is：
1) electrical source power factor is improve, while reducing the harmonic content of mains input current.
2) pass through current-limiting circuit, inrush current is restrained effectively, improves the reliability of Switching Power Supply.
Alternatively, controller 2 can be UC3854 control chip.
Alternatively, Boost circuit 3 can be booster type (Boost) power factor corrector (PFC) circuit.
Alternatively, in the power supply based on the conduction type harmonics restraint of PFC of the present invention, which also includes flow equalizing circuit
12nd, power sense circuit 13 and overheating protection circuit 14；
One end of flow equalizing circuit 12, power sense circuit 13 and overheating protection circuit 14 is all electrically connected with the controller；
12 other end of flow equalizing circuit is electrically connected with exterior PC；13 other end of power sense circuit and verification enable port PENA
Electrical connection.
In the present embodiment, flow equalizing circuit 12 can be band parallel connected end automatic load flow equalizing circuit, and which can apply to directly
The parallel connection of stream power supply, to realize powerful power-supply system.
Alternatively, as shown in Fig. 2 in the power supply based on the conduction type harmonics restraint of PFC of the present invention, current limliting is electric
Road 6 includes photoelectric isolating coupler U1 (U1 can be photoelectric isolating coupler TLP191), (Q1 can be three to NPN triode Q1
Pole pipe S9013), N-channel MosFET pipe M1, controllable silicon Q2, voltage-stabiliser tube Z1, resistance R1, resistance R2, resistance R3, resistance R4, resistance
R5；
One end of resistance R1 is connected with accessory power supply anode (positive terminal voltage can be 15V), its other end and the first of U1
Pin connects；One end of resistance R2 and the 9th pin (reference voltage REF) of controller (controller can be UC3854 chip)
Connect, the R2 other end is connected with the base stage of Q1；The emitter stage of Q1 connects the power source reference ground of the conduction type harmonics restraint based on PFC,
The colelctor electrode of Q1 is connected with the second pin of U1；3rd pin of U1 and the positive pole of voltage-stabiliser tube Z1, one end of resistance R3, electric capacity C1
One end, one end of resistance R5, the gate pole of the source electrode of M1 and Q2 connect, the 4th pin of U1 and the negative pole of Z1, resistance R3 another
The gate pole of one end, the other end of electric capacity C1 and M1 connects；The other end of resistance R5 and the negative electrode of Q2, the output end vo ut phase of power supply
Connect；The drain electrode of M1 is connected with one end of resistance R4, and the other end of R4 is connected with the pre- steady step voltage VR of the anode of Q2, power supply.
In the present embodiment, current-limiting circuit 6 can suppress the defect of inrush current present in power supply.
Alternatively, as shown in figure 3, the present invention implement in the power supply based on the conduction type harmonics restraint of PFC in, all flow
Circuit 12 includes second controller U2 (U2 can be LM324), resistance R1a, resistance R2a, resistance R3a, resistance R4a, resistance
R5a, resistance R6a, resistance R7a, resistance R8a, electric capacity C1a；
4th pin of U2 is connected with accessory power supply anode, and the 11st pin of U2 is connected with accessory power supply reference ground；Electricity
The magnitude of voltage Vin collected on one end of resistance R1a and the electric power outputting current sampling resistor based on the conduction type harmonics restraint of PFC
Connect, the resistance R1a other end is connected with the 13rd pin of U2；One end of one end of resistance R2a and electric capacity C1a, the tenth of U2 the
Three pins are connected, and the resistance R2a other end is connected with the other end of electric capacity C1a, the 14th pin of U2；12nd pin of U2 with
Accessory power supply reference ground connects；14th pin of U2 is connected with the 3rd pin of U2；The second pin of U2 is drawn with the first of U2
Pin, one end of resistance R3a, one end of resistance R4a connect；One end of the other end of resistance R3a and resistance R5a, the biography based on PFC
The power sources in parallel signal Vp of conductivity type harmonics restraint connects；6th pin of the other end of resistance R5a and U2, one end of resistance R6a
Connect；The other end of resistance R6a is connected with the 7th pin of U2, one end of resistance R8a；The of the other end of resistance R4a and U2
Five pins, one end of resistance R7a connect；The other end of resistance R7a is connected with the 9th pin of U2, the 8th pin of U2；Resistance
Tenth pin of the other end of R8a and U2, controller (can be UC3854) the 11st pin (voltage feedback signal Vsense)
Connect.
In the present embodiment, flow equalizing circuit 12 can be band parallel connected end automatic load flow equalizing circuit, can be applicable to direct current
The parallel connection in source, to realize powerful power-supply system.
Alternatively, in the power supply based on the conduction type harmonics restraint of PFC of the present invention, which also includes overvoltage protection
Circuit 11；11 one end of overvoltage crowbar is electrically connected with controller 2, and its other end is electrically connected with the output end of filtering energy storage 7.
Alternatively, in the power supply based on the conduction type harmonics restraint of PFC of the present invention, overvoltage crowbar 11 is
Two grades of output overvoltage protection circuits.
In the present embodiment, what overvoltage crowbar 11 can improve the power supply of the conduction type harmonics restraint based on PFC can
By property and the precision of voltage regulation.
Alternatively, as shown in Fig. 4 a, 4b, 4c, in the power supply of the conduction type harmonics restraint based on PFC of the present invention
In, two grades of output overvoltage protection circuits include resistance R1b, resistance R2b, resistance R3b, resistance R4b, resistance R5b, resistance R6b, electricity
Resistance R7b, resistance R8b, resistance R9b, resistance R10b, resistance R11b, the 3rd controller U3, triode Q1b, triode Q2b, two poles
Pipe D1b, diode D2b, diode D3b, voltage-stabiliser tube Z1b, electric capacity C1b；
Fig. 4 a is to carry out two-stage partial pressure sampling to output voltage, and it is to adopt that sampled signal is Vref2 and Vref3, Fig. 4 b respectively
Voltage signal Vref3 big for sampled value in Fig. 4 a is compared with the reference voltage signal Vref1 for setting with hysteresis comparator
Afterwards recoverable protection is implemented to power supply, Fig. 4 c be using positive feedback comparator by voltage signal little for sampled value in Fig. 4 a
Vref2 implements expendable protection to power supply after being compared with the reference voltage Vref 1 for setting.
3rd pin of U3 (U3 be voltage comparator Lm339) connects with accessory power supply anode, the 12nd pin of U3 and
Connect to power source reference；
Power output end Vout is connected with one end of R1b, the other end of R1b and the big voltage of one end of R2b and sampled value
Signal Vref3 connects, and the other end of the R2b voltage signal Vref2 little with one end of R3b and sampled value connects, and resistance R3b
The other end is connected with power source reference ground.
Vref3 is connected with one end of resistance R4b, and the other end of R4b is connected with the 5th pin of one end of R5b and U3；R5b
The other end connect with one end of the second pin of U3, one end of R6b and R7b；4th pin of U3 and the reference voltage for setting
Vref1 connects；The other end of R7b is connected with the base stage of Q1b, and the emitter stage of Q1b is connected with power source reference ground, the colelctor electrode of Q1b
Connect with the tenth pin (the enable signal ENA of control chip UC3854) of controller.
Vref2 is connected with the 7th pin of U3, and Vref1 is connected with one end of resistance R8b, the other end of R8b and the sun of D1b
6th pin of pole and U3 connects, the negative electrode of D1b and the colelctor electrode of Q2b, the 16th pin of controller and one end phase of R10b
Connect, the other end of R10b is connected with the negative electrode of D2b, (control chip UC3854 makes the tenth pin of the anode of D2b and controller
Energy signal ENA) connect；The base stage of Q2b is connected with the anode of one end of R11b and Z1b, the emitter stage of Q2b and the other end of R11b
With power source reference connect, the negative electrode of Z1b is connected with the negative electrode of one end of C1b and D3b, the other end of C1b and power source reference ground
Connect, the anode of D3b is connected with first pin of one end of R9b and U3, and the other end of R9b is connected with accessory power supply anode.
The step of method described in conjunction with the embodiments described herein or algorithm, directly can be held with hardware, processor
Capable software module, or the combination of the two is implementing.Software module can be placed in random access memory, internal memory, read-only storage,
Electrically programmable ROM, electricity can sassafras except in programming ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field institute public
In the storage medium of any other forms that knows.
It is understood that for the person of ordinary skill of the art, can be done with technology according to the present invention design
Go out other various corresponding changes and deformation, and all these changes should all belong to the protection model of the claims in the present invention with deformation
Enclose.
Claims (6)
1. a kind of power supply of the conduction type harmonics restraint based on PFC, it is characterised in that：Which includes rectifier bridge, controller, Boost
Booster circuit, filter circuit, accessory power supply, current-limiting circuit, filtering accumulator, first voltage detection circuit, current detecting electricity
Road, second voltage detection circuit；
Rectifier bridge one end is electrically connected with AC power, its other end successively with Boost circuit, filter circuit, current-limiting circuit,
Filtering accumulator electrical connection；
Controller adopt UC3854 chip, controller respectively with accessory power supply, first voltage detection circuit, current detection circuit,
One end electrical connection of second voltage detection circuit；The accessory power supply other end is connected electrically between filter circuit and current-limiting circuit, from
The end power taking of power supply intergrade VR；The other end of first voltage detection circuit is connected electrically between rectifier bridge and Boost circuit；
The other end of current detection circuit is electrically connected with Boost circuit；Rectifier bridge is unidirectional for switching to the alternating current of input
Direct current, and by direct current electricity output to Boost circuit；
Boost circuit is used for raising direct current after the conversion that rectifier bridge is exported；Filter circuit is used for filtering rectifier bridge output
Ripple in DC voltage, and by the direct current electricity output after filtration to current-limiting circuit；
Accessory power supply is used for from the end power taking of power supply intergrade VR, is that controller provides primary power, and power supply intergrade VR end is located at
Between filter circuit and current-limiting circuit；
Current-limiting circuit is used for the inrush current suppressed in accessory power supply；Current-limiting circuit includes photoelectric isolating coupler U1, NPN
Triode Q1, N-channel MosFET pipe M1, controllable silicon Q2, voltage-stabiliser tube Z1, resistance R1, resistance R2, resistance R3, resistance R4, resistance
R5；One end of resistance R1 is connected with accessory power supply anode, and its other end is connected with first pin of U1；One end of resistance R2 and control
9th pin of device processed connects, and the R2 other end is connected with the base stage of Q1；The emitter stage of Q1 connects the conduction type harmonics restraint based on PFC
Power source reference ground, the colelctor electrode of Q1 connected with the second pin of U1；3rd pin of U1 and the positive pole of voltage-stabiliser tube Z1, resistance R3
One end, one end of electric capacity C1, one end of resistance R5, the gate pole of the source electrode of M1 and Q2 connect, the 4th pin of U1 is negative with Z1
The gate pole of pole, the other end of resistance R3, the other end of electric capacity C1 and M1 connects；The other end of resistance R5 and the negative electrode of Q2, power supply
Output end vo ut connect；The drain electrode of M1 is connected with one end of resistance R4, the other end of R4 and the anode of Q2, the pre- steady level of power supply
Voltage VR connects；
Filtering accumulator is used for electric charge of the storage after current-limiting circuit current limliting, powers to external loading；
The DC voltage value that first voltage detection circuit is used for exporting rectifier bridge is converted into first voltage amount and exports to control
Device processed；
The DC current flow value that current detection circuit is used for exporting rectifier bridge is converted into second voltage amount and exports to controller；
Second voltage detection circuit is used for the DC voltage of filtering energy storage circuit output to be converted into tertiary voltage amount and exported
To controller；
Controller is used for receiving first voltage amount, second voltage amount, tertiary voltage amount, and according to first voltage amount, second voltage
Amount, tertiary voltage amount are adjusted to the power of the conduction type harmonics restraint based on PFC.
2. the power supply of the conduction type harmonics restraint based on PFC as claimed in claim 1, it is characterised in which also includes all to flow
Circuit, power sense circuit and overheating protection circuit；One end of flow equalizing circuit, power sense circuit and overheating protection circuit
All it is electrically connected with the controller；The flow equalizing circuit other end is electrically connected with exterior PC；The power sense circuit other end and verification Enable Pin
Mouth PENA electrical connection.
3. the power supply of the conduction type harmonics restraint based on PFC as claimed in claim 1 or 2, it is characterised in that flow equalizing circuit bag
Include second controller U2, resistance R1a, resistance R2a, resistance R3a, resistance R4a, resistance R5a, resistance R6a, resistance R7a, resistance
R8a, electric capacity C1a；
Second controller U2 adopts LM324 chip, and the 4th pin of U2 connects with accessory power supply anode, the 11st pin of U2 and
Accessory power supply reference ground connects；One end of resistance R1a is electric with the electric power outputting current sampling of the conduction type harmonics restraint based on PFC
The magnitude of voltage Vin collected in resistance connects, and the resistance R1a other end is connected with the 13rd pin of U2；One end of resistance R2a and electricity
Hold one end of C1a, the 13rd pin of U2 to be connected, the other end of the resistance R2a other end and electric capacity C1a, the 14th pin of U2
Connect；12nd pin of U2 is connected with accessory power supply reference ground；14th pin of U2 is connected with the 3rd pin of U2；U2's
First pin of second pin and U2, one end of resistance R3a, one end of resistance R4a connect；The other end of resistance R3a and resistance
One end of R5a, connected based on the power sources in parallel signal Vp of the conduction type harmonics restraint of PFC；The of the other end of resistance R5a and U2
Six pins, one end of resistance R6a connect；The other end of resistance R6a is connected with the 7th pin of U2, one end of resistance R8a；Resistance
The other end of R4a is connected with the 5th pin of U2, one end of resistance R7a；9th pin of the other end of resistance R7a and U2, U2
The 8th pin connect；Tenth pin of the other end of resistance R8a and U2, the 11st pin of controller connect.
4. the power supply of the conduction type harmonics restraint based on PFC as claimed in claim 2, it is characterised in which also includes overvoltage
Protection circuit；Overvoltage crowbar one end is electrically connected with the controller, and its other end is electrically connected with the output end of filtering accumulator.
5. the power supply of the conduction type harmonics restraint based on PFC as claimed in claim 4, it is characterised in that overvoltage crowbar
For two grades of output overvoltage protection circuits.
6. the power supply of the conduction type harmonics restraint based on PFC as claimed in claim 5, it is characterised in that two grades of output overvoltages
Protection circuit include resistance R1b, resistance R2b, resistance R3b, resistance R4b, resistance R5b, resistance R6b, resistance R7b, resistance R8b,
Resistance R9b, resistance R10b, resistance R11b, the 3rd controller U3, triode Q1b, triode Q2b, diode D1b, diode
D2b, diode D3b, voltage-stabiliser tube Z1b, electric capacity C1b；
3rd controller U3 is connected with accessory power supply anode for the 3rd pin of voltage comparator LM339, U3, and the 12nd of U3 draws
Pin is connected with power source reference ground；Power output end Vout is connected with one end of R1b, the other end of R1b and one end of R2b and sampling
The big voltage signal Vref3 of value connects, and the other end of the R2b voltage signal Vref2 little with one end of R3b and sampled value connects,
And the other end of resistance R3b is connected with power source reference ground；Vref3 is connected with one end of resistance R4b, and the other end of R4b is with R5b's
5th pin of one end and U3 connects；The other end of R5b is connected with one end of the second pin of U3, one end of R6b and R7b；U3
The 4th pin with set reference voltage Vref 1 connect；The other end of R7b is connected with the base stage of Q1b, the emitter stage of Q1b with
Connect to power source reference, the colelctor electrode of Q1b is connected with the tenth pin of controller；
Vref2 is connected with the 7th pin of U3, and Vref1 is connected with one end of resistance R8b, the other end of R8b and the anode of D1b and
6th pin of U3 connects, and the negative electrode of D1b is connected with one end of the colelctor electrode of Q2b, the 16th pin of controller and R10b,
The other end of R10b is connected with the negative electrode of D2b, and the anode of D2b is connected with the tenth pin of controller；The base stage of Q2b is with R11b's
The anode of one end and Z1b connects, and the emitter stage of Q2b and the other end of R11b and power source reference ground connect, the negative electrode of Z1b and C1b
One end and the negative electrode of D3b connect, the other end of C1b is connected with power source reference ground, the anode of D3b and one end of R9b and U3's
First pin connects, and the other end of R9b is connected with accessory power supply anode.
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| CN104467388B true CN104467388B (en) | 2017-03-08 |
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| CN108666979B (en) * | 2018-04-24 | 2019-09-13 | 湖北三江航天万峰科技发展有限公司 | A kind of high-voltage switch power supply real-time protection circuit |
| CN110504847A (en) * | 2018-05-18 | 2019-11-26 | 龙海特尔福汽车电子研究所有限公司 | A kind of AC-DC converter based on PFC+LLC topology |
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|---|---|---|---|---|
| CN101263439A (en) * | 2005-09-15 | 2008-09-10 | 皇家飞利浦电子股份有限公司 | Improved inrush current limiter device and power factor control circuit having the same |
| CN201408996Y (en) * | 2008-10-07 | 2010-02-17 | 厦门科华恒盛股份有限公司 | Three-phase input equal current-sharing controller with power factor correction |
| CN201805362U (en) * | 2010-09-29 | 2011-04-20 | 航天科工惯性技术有限公司 | Step current limiting circuit used for aviation AC/DC conversion |
| CN102176807A (en) * | 2011-03-08 | 2011-09-07 | 河海大学常州校区 | Self-protective variable frequency modulation ICP (Inductively Coupled Plasma) ballast |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101436829B (en) * | 2003-04-22 | 2011-08-10 | 三垦电气株式会社 | Power factor improving circuit |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101263439A (en) * | 2005-09-15 | 2008-09-10 | 皇家飞利浦电子股份有限公司 | Improved inrush current limiter device and power factor control circuit having the same |
| CN201408996Y (en) * | 2008-10-07 | 2010-02-17 | 厦门科华恒盛股份有限公司 | Three-phase input equal current-sharing controller with power factor correction |
| CN201805362U (en) * | 2010-09-29 | 2011-04-20 | 航天科工惯性技术有限公司 | Step current limiting circuit used for aviation AC/DC conversion |
| CN102176807A (en) * | 2011-03-08 | 2011-09-07 | 河海大学常州校区 | Self-protective variable frequency modulation ICP (Inductively Coupled Plasma) ballast |
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