CN105720817A - PFC soft switching circuit of BOOST circuit - Google Patents
PFC soft switching circuit of BOOST circuit Download PDFInfo
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- CN105720817A CN105720817A CN201610264747.7A CN201610264747A CN105720817A CN 105720817 A CN105720817 A CN 105720817A CN 201610264747 A CN201610264747 A CN 201610264747A CN 105720817 A CN105720817 A CN 105720817A
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
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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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a PFC soft switching circuit of a BOOST circuit. The PFC soft switching circuit comprises a switch SW4 and a freewheel diode D1 in the BOOST circuit, and also comprises an inductor L2, a capacitor C1, a capacitor C2, a diode D2, a diode D3 and a diode D4, wherein a branch formed by the capacitor C1 and the diode D2 homodromously connected in series is homodromously connected with the two ends of the freewheel diode D1 in parallel; the PFC soft switching circuit also comprises a freewheel diode D5, a switch SW1, an inductor L3, an inductor L4, a diode D5, a diode D7, a diode D8, a capacitor C4, a capacitor C5, a capacitor C6 and a resistor R6, wherein the negative pole of an input power VCC is connected with one end of the inductor L4, and the other end of the inductor L4 is connected with the cathode of the freewheel diode D5. The PFC soft switching circuit does not need the complex control technology, nor need the auxiliary IGBT, is simple and effective in implementation mode, and can always achieve useful effect from light load to heavy load.
Description
Technical field
The present invention relates to BOOST circuit support circuit field, particularly the PFC soft switch circuit of a kind of BOOST circuit.
Background technology
BOOST circuit is a kind of switch DC booster circuit, and it is mainly used in the fields such as Power Electronic Technique, switch power technology, new energy technology.At present, BOOST circuit substantially adopts and first then induction charging is released to the scheme of electric capacity to realize the lifting of voltage by the energy that inductance stores, but owing to the loss of switching device is high, and caloric value is relatively big, causes circuit conversion efficiency low, and circuit lifetime is short.
Sofe Switch: Sofe Switch English name " softswitching ", namely by rational circuit design, switching device is made to open and turn off transient state, it is in no-voltage/zero current turning-on/off state, the loss of switching device is reduced with this, improve system effectiveness, reduce devices switch transient state simultaneously and meet with stresses, increase system reliability.
Transistor as switching device be applied in instantly in electronic product more and more extensive, meanwhile, the change maked rapid progress along with science and technology and the development of human civilization, energy-conserving and environment-protective have been the inexorable trends under entire society's environmental development.As key technology various " Sofe Switch " circuit of power electronics aspect, owing to having higher efficiency, the advantages such as switch stress is less, and temperature rise is less, use in many transistor switching circuits.More existing " Sofe Switch " for BOOST booster circuit architecture design generally adopts the mode of auxiliary transistor circuit to realize, this " Sofe Switch " circuit is owing to increasing auxiliary transistor, necessarily there is drive circuit, and take the I/O interface of control chip, add the difficulty of control simultaneously, it is likely to when I/O interface is inadequate need to select more costly chip, there is certain limitation, it is achieved mode is more complicated.
Summary of the invention
For drawbacks described above, the no-voltage that it is an object of the invention to propose to realize switching device is opened, the zero-current switching of fly-wheel diode and reduce switching tube and turn off stress, it is not necessary to adopt complicated control technology, novel in design, realize simple, and system effectiveness and stability can be effectively improved.
For reaching this purpose, the present invention by the following technical solutions:
The PFC soft switch circuit of a kind of BOOST circuit, including the switch SW4 in BOOST circuit and sustained diode 1；Also include inductance L2, electric capacity C1, electric capacity C2, electrolytic capacitor filter C3, diode D2, diode D3, diode D4 and resistance R5, by the branch road of electric capacity C1 and diode D2 series aiding connection, be connected in parallel on the two ends of described sustained diode 1 in the same direction；
One end of described inductance L2 is connected to the positive pole of electric capacity C1, and the other end of inductance L2 is connected to the positive pole of described switch SW4；
One end of electric capacity C2 and the positive pole of diode D3 concatenate in the same direction as after branch road, and the negative pole of diode D3 is connected between electric capacity C1 and diode D2, and the other end of electric capacity C2 is connected to the negative pole of described switch SW4；
The positive pole of described diode D4 is connected between inductance L2 and described switch SW4, and the negative pole of described diode D4 is connected between electric capacity C2 and diode D3；
The positive pole of described electrolytic capacitor filter C3 is connected to the negative pole of diode D2, and the negative pole of electrolytic capacitor filter C3 is connected to the negative pole of described switch SW4；Resistance R5 is connected in the two ends of electrolytic capacitor filter C3 in parallel；
Also include sustained diode 5, switch SW1, inductance L3, diode D6, diode D7, diode D8, electric capacity C4, electric capacity C5, electrolytic capacitor filter C6 and resistance R6；
The branch road of described diode D6 and electric capacity C5 series aiding connection, and it is connected in parallel on the two ends of described sustained diode 5 in the same direction；
Described inductance L3 and switch SW1 concatenation are for after branch road, and an end of inductance L3 is connected to the cathode terminal of sustained diode 5, and one end of switch SW1 is connected with described switch SW4；
One end of electric capacity C4 and the negative pole concatenation of diode D7 are for after branch road, and the positive pole of diode D7 is connected between electric capacity C5 and diode D6, and the other end of electric capacity C4 is connected to the negative pole of described switch SW4；
The positive pole of described diode D8 is connected between electric capacity C4 and diode D7, and the negative pole of described diode D8 is connected between inductance L3 and described switch SW1；
The positive pole of described electrolytic capacitor filter C6 is connected to the negative pole of described switch SW4, and the negative pole of electrolytic capacitor filter C6 is connected to the positive pole of diode D6, and resistance R6 is connected in the two ends of electrolytic capacitor filter C6 in parallel.
Preferably, also include input power VCC, inductance L1 and inductance L4, the positive pole of described input power VCC is connected with one end of inductance L1, and the other end of inductance L1 is connected with the anode of described sustained diode 1, and the negative pole of described input power VCC is connected with the negative pole of described switch SW4；
The negative pole of input power VCC is connected with one end of inductance L4, the negative electrode of sustained diode 5 described in the other end of inductance L4.
Preferably, the inductance value of described inductance L2 is significantly smaller than the inductance value of inductance L1, i.e. L2 < < L1；The inductance value of inductance L3 is significantly smaller than inductance L4, i.e. L3 < < L4.
Preferably, the capacitance of described electrolytic capacitor filter C3 is noticeably greater than electric capacity C1 and the capacitance of electric capacity C2, i.e. C3 > > C1, C3 > > C2；
The capacitance of described electrolytic capacitor filter C6 is noticeably greater than electric capacity C4 and the capacitance of electric capacity C5, i.e. C6 > > C4, C6 > > C5.
Preferably, described switch SW4 is switch element or transistor device.
Preferably, also including an input current source and a voltage source, the positive pole of described input current source is connected with the anode of described sustained diode 1, and the negative pole of described input current source is connected with the negative pole of described sustained diode 5；
The positive pole of described voltage source is connected with the negative electrode of described sustained diode 1, and the negative pole of described voltage source is connected with the positive pole of described sustained diode 5.
Complexity is controlled for more existing " Sofe Switch " circuit, the problem not easily realized, this patent adopts a kind of new way, BOOST circuit " Sofe Switch " function is realized by the characteristic of inductance capacitance and diode reverse cutoff function, decrease the complexity of control, improve stability simultaneously, this patent realizes " Sofe Switch " function of transistor in BOOST circuit by ball bearing made, have low in energy consumption, efficiency is high, the advantages such as simple easily realization, drive circuit that need not be complicated, without auxiliary transistor, it is parallel in the middle of main circuit, Sofe Switch function can be realized from underloading to heavy duty, have the advantage that
1, without complicated controls technology, also without the IGBT of auxiliary, implementation simply effectively, and can useful effect from underloading to heavy duty；
2, the Sofe Switch of switching tube and fly-wheel diode can be realized, be effectively improved system effectiveness；
3, reduce the shutoff stress of switching tube and fly-wheel diode, improve system stability.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of one embodiment of the present of invention；
Fig. 2 is the circuit diagram of the breaker in middle SW4 of the present invention embodiment when opening moment；
Fig. 3 is the circuit diagram of embodiment during breaker in middle SW4 of the present invention shutoff.
Detailed description of the invention
Technical scheme is further illustrated below in conjunction with accompanying drawing and by detailed description of the invention.
As it is shown in figure 1, the PFC soft switch circuit of a kind of BOOST circuit, including the switch SW4 in BOOST circuit and sustained diode 1；Also include inductance L2, electric capacity C1, electric capacity C2, electrolytic capacitor filter C3, diode D2, diode D3, diode D4 and resistance R5, by the branch road of electric capacity C1 and diode D2 series aiding connection, be connected in parallel on the two ends of described sustained diode 1 in the same direction；
One end of described inductance L2 is connected to the positive pole of electric capacity C1, and the other end of inductance L2 is connected to the positive pole of described switch SW4；
One end of electric capacity C2 and the positive pole of diode D3 concatenate in the same direction as after branch road, and the negative pole of diode D3 is connected between electric capacity C1 and diode D2, and the other end of electric capacity C2 is connected to the negative pole of described switch SW4；
The positive pole of described diode D4 is connected between inductance L2 and described switch SW4, and the negative pole of described diode D4 is connected between electric capacity C2 and diode D3；
The positive pole of described electrolytic capacitor filter C3 is connected to the negative pole of diode D2, and the negative pole of electrolytic capacitor filter C3 is connected to the negative pole of described switch SW4；Resistance R5 is connected in the two ends of electrolytic capacitor filter C3 in parallel；
Also include sustained diode 5, switch SW1, inductance L3, diode D6, diode D7, diode D8, electric capacity C4, electric capacity C5, electrolytic capacitor filter C6 and resistance R6；
The branch road of described diode D6 and electric capacity C5 series aiding connection, and it is connected in parallel on the two ends of described sustained diode 5 in the same direction；
Described inductance L3 and switch SW1 concatenation are for after branch road, and an end of inductance L3 is connected to the cathode terminal of sustained diode 5, and one end of switch SW1 is connected with described switch SW4；
One end of electric capacity C4 and the negative pole concatenation of diode D7 are for after branch road, and the positive pole of diode D7 is connected between electric capacity C5 and diode D6, and the other end of electric capacity C4 is connected to the negative pole of described switch SW4；
The positive pole of described diode D8 is connected between electric capacity C4 and diode D7, and the negative pole of described diode D8 is connected between inductance L3 and described switch SW1；
The positive pole of described electrolytic capacitor filter C6 is connected to the negative pole of described switch SW4, and the negative pole of electrolytic capacitor filter C6 is connected to the positive pole of diode D6, and resistance R6 is connected in the two ends of electrolytic capacitor filter C6 in parallel.
Preferably, also include input power VCC, inductance L1 and inductance L4, the positive pole of described input power VCC is connected with one end of inductance L1, and the other end of inductance L1 is connected with the anode of described sustained diode 1, and the negative pole of described input power VCC is connected with the negative pole of described switch SW4；
The negative pole of input power VCC is connected with one end of inductance L4, the negative electrode of sustained diode 5 described in the other end of inductance L4.
Preferably, the inductance value of described inductance L2 is significantly smaller than the inductance value of inductance L1, i.e. L2 < < L1；The inductance value of inductance L3 is significantly smaller than inductance L4, i.e. L3 < < L4.
Preferably, the capacitance of described electrolytic capacitor filter C3 is noticeably greater than electric capacity C1 and the capacitance of electric capacity C2, i.e. C3 > > C1, C3 > > C2；
The capacitance of described electrolytic capacitor filter C6 is noticeably greater than electric capacity C4 and the capacitance of electric capacity C5, i.e. C6 > > C4, C6 > > C5.
Preferably, described switch SW4 is switch element or transistor device.
Preferably, also including an input current source and a voltage source, the positive pole of described input current source is connected with the anode of described sustained diode 1, and the negative pole of described input current source is connected with the negative pole of described sustained diode 5；
The positive pole of described voltage source is connected with the negative electrode of described sustained diode 1, and the negative pole of described voltage source is connected with the positive pole of described sustained diode 5.
Operation principle:
1, when, after plant-grid connection, inductance (L1/L4) and soft switch circuit inductance (L2/L3) being passed through and charge to electric capacity in soft switch circuit (C2/C4), (C2/C4) produces voltage；Described soft switch circuit electric capacity (C1/C5) is low due to the forward conduction voltage drop of fly-wheel diode (D1/D5), and therefore electric capacity (C1/C5) both end voltage is almost zero.
2, when switching (SW4/SW1) and opening simultaneously, input power VCC forms loop by inductance L1, soft switch circuit inductance L2, switch SW4, switch SW1, soft switch circuit inductance L3 and main circuit inductance L4, and input power is to inductance L1/L4 charging energy-storing；Existence due to soft inductance L2/L3, inductive impedance is much larger than the hindrance opened, therefore input pressure drop almost has Sofe Switch inductance to bear, switch (SW4/SW1) is the conducting of both end voltage almost no-voltage when conducting, it is achieved switch (SW4/SW1) no-voltage opens function (ZVS)；On the other hand, due to before switch (SW4/SW1) is opened, there is high voltage at soft switch circuit electric capacity (C2/C4) two ends, therefore can be charged to electric capacity (C1/C5) by Sofe Switch diode (D3/D7) in switch (SW4/SW1) opening process, by soft switch circuit inductance (L2/L3), switch (SW4/SW1) forms loop；Above, soft switch circuit electric capacity (C1/C5) charges, soft switch circuit inductance (L2/L3) energy storage, inductive current linear rise, when inductance (L2/L3) electric current rises to consistent with inductance (L1/L4), fly-wheel diode (D1/D5) will turn off, thus the Zero-current soft realizing fly-wheel diode turns off (ZCS), reduce the transient stress that diode bears when off, after this owing to Sofe Switch inductance (L2/L3) inductance value is little, by saturated work after switch (SW4/SW1) is opened, impedance reduces almost nil, inductance (L1/L4) and soft switch circuit inductance L2 tandem working.While above work process, load is powered by electrolytic capacitor filter C3/C6.
3, when switching (SW4/SW1) and turning off, soft switch circuit electric capacity (C1/C5) is owing to raising with soft switch circuit inductance (L2/L3) junction point current potential, the energy causing electric capacity (C1/C5) is charged to electric capacity C3 by D2/D6, until when C1 both end voltage is almost nil, sustained diode 1 turns on, input power VCC is charged to electrolytic capacitor filter (C3/C6) by inductance L1 and fly-wheel diode (D1/D5) simultaneously, gives load (R5/R6) power supply simultaneously；Electric capacity C2/C4 passes through Sofe Switch inductance (L2/L3), diode (D4/D8) forms loop with input power VCC and inductance (L1/L4), charge to electric capacity (C2/C4), and the effect due to electric capacity (C2/C4) and diode (D4/D8), due to voltage spikes can be less than normal when turning off transient state for switch (SW4/SW1), along with electric capacity (C2/C4) is fully charged, voltage will be lifted to slightly above electric capacity (C3/C6) both end voltage, can effectively suppress the peak voltage at switching tube two ends.
4, when switching SW1 length and opening, switch SW4 Guan Bi disconnects: when SW4 closes, input power VCC forms loop (inductance L3 is constantly in saturation conduction state owing to switch SW1 turns on for a long time) by inductance L1, soft switch circuit inductance L2, switch SW4, switch SW1, soft switch circuit inductance L3 and main circuit inductance L4, and input power is to inductance L1/L4 charging energy-storing；Existence due to soft inductance L2/L3, inductive impedance is much larger than the hindrance opened, therefore input pressure drop almost has Sofe Switch inductance to bear, switch (SW4/SW1) is the conducting of both end voltage almost no-voltage when conducting, it is achieved switch (SW4/SW1) no-voltage opens function (ZVS)；On the other hand, owing to, before switch SW4 opens, there is high voltage at soft switch circuit electric capacity C2 two ends, therefore being charged to electric capacity C1 by Sofe Switch diode D3 in switch SW4 opening process, by soft switch circuit inductance L2, switch SW4 forms loop；Above, soft switch circuit electric capacity C1 charges, soft switch circuit inductance L2 energy storage, inductive current linear rise, when inductance L2 electric current rises to consistent with inductance L1, sustained diode 1 will turn off, thus the Zero-current soft realizing fly-wheel diode turns off (ZCS), reduce the transient stress that diode bears when off, after this owing to Sofe Switch inductance L2 inductance value is little, by saturated work after switch SW4 opens, impedance is reduced to zero, inductance L1 and soft switch circuit inductance L2 tandem working.While above work process, load is powered by electrolytic capacitor filter C3/C6.
5, when switching SW1 length and opening, when switch SW4 turns off, soft switch circuit electric capacity C1 is owing to raising with soft switch circuit inductance L2 junction point current potential, the energy causing electric capacity C1 is charged to electric capacity C3 by D2, until when C1 both end voltage is almost nil, sustained diode 1 turns on, input power VCC gives electrolytic capacitor filter C3 charging by inductance L1 and sustained diode 1, switching SW1 by lower half, Sofe Switch inductance L3, the main inductance L4 of saturation conduction form loop, and load (R5/R6) is powered by electric capacity C3 and C6；Electric capacity C2 passes through Sofe Switch inductance L2, diode D4 and input power VCC and inductance L1 forms loop, charge to electric capacity C2, and the effect due to electric capacity C2 and diode D4, due to voltage spikes can be less than normal when turning off transient state for switch SW4, along with electric capacity C2 is fully charged, voltage will be lifted to slightly above electric capacity C3 both end voltage, can effectively suppress the peak voltage at switching tube two ends.
6, in like manner, switching in the long-term opening process of SW4 at upper half, lower half operation principle will such as the 4th and the 5th point.
There is the circuit of the principle of similitude as in figure 2 it is shown, when (now switch SW4 disconnects) after plant-grid connection, inductance L1 and inductance L2 can be passed through and charges to electric capacity C2, produce voltage at the two ends of electric capacity C2；Owing to the forward conduction voltage drop of sustained diode 1 is low, therefore the voltage at electric capacity C1 two ends is almost nil.
When switch SW4 opens moment, circuit turn-on situation is as shown in Figure 2, input power VCC forms loop by inductance L1, inductance L2, switch SW4, in circuit, electric current rises, simultaneously, effect due to inductance L2, switch SW4 is the almost nil voltage turn-on of both end voltage when conducting, thus the no-voltage of circuit realiration switch SW4 opens function (ZVS)；On the other hand, owing to, before switch SW4 opens, there is high voltage at electric capacity C2 two ends, and inductance L2, diode D4, diode D3 and electric capacity C1 form loop, and therefore electric capacity C2 is charged to electric capacity C1 by diode D3；Above, electric capacity C1 charges, inductance L2 energy storage, inductive current linear rise, when inductance L2 electric current rises to consistent with inductance L1, sustained diode 1 turns off, it is achieved thereby that the Zero-current soft of sustained diode 1 turns off (ZCS), reduce the transient stress that diode bears when off, after this inductance L1 and inductance L2 tandem working.And while above work process, load is powered by electrolytic capacitor filter C3.
When switching SW4 and turning off, workflow is as shown in Figure 3, electric capacity C1 is owing to raising with inductance L2 junction point current potential, the energy causing electric capacity C1 is charged to electric capacity C3 by diode D2, until when electric capacity C1 both end voltage is almost nil, sustained diode 1 turns on, input power VCC gives electrolytic capacitor filter C3 charging by inductance L1 and sustained diode 1, powers to load R5 simultaneously；Inductance L2, diode D4 form loop with input power VCC and inductance L1, charge to electric capacity C2, and the effect due to electric capacity C2 and diode D4, due to voltage spikes can be less than normal when turning off transient state for switch SW4, along with electric capacity C2 is fully charged, the voltage that voltage will be lifted to slightly above electric capacity C3 two ends, can effectively suppress the peak voltage of switch ends.
Complexity is controlled for more existing " Sofe Switch " circuit, the problem not easily realized, this patent adopts a kind of new way, BOOST circuit " Sofe Switch " function is realized by the characteristic of inductance capacitance and diode reverse cutoff function, decrease the complexity of control, improve stability simultaneously, this patent realizes " Sofe Switch " function of transistor in BOOST circuit by ball bearing made, have low in energy consumption, efficiency is high, the advantages such as simple easily realization, drive circuit that need not be complicated, without auxiliary transistor, it is parallel in the middle of main circuit, Sofe Switch function can be realized from underloading to heavy duty, have the advantage that
1, without complicated controls technology, also without the IGBT of auxiliary, implementation simply effectively, and can useful effect from underloading to heavy duty；
2, the Sofe Switch of switching tube and fly-wheel diode can be realized, be effectively improved system effectiveness；
3, reduce the shutoff stress of switching tube and fly-wheel diode, improve system stability.
The know-why of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explanation principles of the invention, and can not be construed to limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art need not pay performing creative labour can associate other detailed description of the invention of the present invention, and these modes fall within protection scope of the present invention.
Claims (6)
1. the PFC soft switch circuit of a BOOST circuit, including the switch SW4 in BOOST circuit and sustained diode 1, it is characterized in that: also include inductance L2, electric capacity C1, electric capacity C2, electrolytic capacitor filter C3, diode D2, diode D3, diode D4 and resistance R5, by the branch road of electric capacity C1 and diode D2 series aiding connection, it is connected in parallel on the two ends of described sustained diode 1 in the same direction；
One end of described inductance L2 is connected to the positive pole of electric capacity C1, and the other end of inductance L2 is connected to the positive pole of described switch SW4；
One end of electric capacity C2 and the positive pole of diode D3 concatenate in the same direction as after branch road, and the negative pole of diode D3 is connected between electric capacity C1 and diode D2, and the other end of electric capacity C2 is connected to the negative pole of described switch SW4；
The positive pole of described diode D4 is connected between inductance L2 and described switch SW4, and the negative pole of described diode D4 is connected between electric capacity C2 and diode D3；
The positive pole of described electrolytic capacitor filter C3 is connected to the negative pole of diode D2, and the negative pole of electrolytic capacitor filter C3 is connected to the negative pole of described switch SW4；Resistance R5 is connected in the two ends of electrolytic capacitor filter C3 in parallel；
Also include sustained diode 5, switch SW1, inductance L3, diode D6, diode D7, diode D8, electric capacity C4, electric capacity C5, electrolytic capacitor filter C6 and resistance R6；
The branch road of described diode D6 and electric capacity C5 series aiding connection, and it is connected in parallel on the two ends of described sustained diode 5 in the same direction；
Described inductance L3 and switch SW1 concatenation are for after branch road, and an end of inductance L3 is connected to the cathode terminal of sustained diode 5, and one end of switch SW1 is connected with described switch SW4；
One end of electric capacity C4 and the negative pole concatenation of diode D7 are for after branch road, and the positive pole of diode D7 is connected between electric capacity C5 and diode D6, and the other end of electric capacity C4 is connected to the negative pole of described switch SW4；
The positive pole of described diode D8 is connected between electric capacity C4 and diode D7, and the negative pole of described diode D8 is connected between inductance L3 and described switch SW1；
The positive pole of described electrolytic capacitor filter C6 is connected to the negative pole of described switch SW4, and the negative pole of electrolytic capacitor filter C6 is connected to the positive pole of diode D6, and resistance R6 is connected in the two ends of electrolytic capacitor filter C6 in parallel.
2. the PFC soft switch circuit of a kind of BOOST circuit according to claim 1, it is characterized in that: also include input power VCC, inductance L1 and inductance L4, the positive pole of described input power VCC is connected with one end of inductance L1, the other end of inductance L1 is connected with the anode of described sustained diode 1, and the negative pole of described input power VCC is connected with the negative pole of described switch SW4；
The negative pole of input power VCC is connected with one end of inductance L4, the negative electrode of sustained diode 5 described in the other end of inductance L4.
3. the PFC soft switch circuit of a kind of BOOST circuit according to claim 2, it is characterised in that: the inductance value of described inductance L2 is significantly smaller than the inductance value of inductance L1, i.e. L2 < < L1；The inductance value of inductance L3 is significantly smaller than inductance L4, i.e. L3 < < L4.
4. the PFC soft switch circuit of a kind of BOOST circuit according to claim 1, it is characterised in that: the capacitance of described electrolytic capacitor filter C3 is noticeably greater than electric capacity C1 and the capacitance of electric capacity C2, i.e. C3 > > C1, C3 > > C2；
The capacitance of described electrolytic capacitor filter C6 is noticeably greater than electric capacity C4 and the capacitance of electric capacity C5, i.e. C6 > > C4, C6 > > C5.
5. the PFC soft switch circuit of BOOST circuit according to claim 1, it is characterised in that: described switch SW4 is switch element or transistor device.
6. the PFC soft switch circuit of a kind of BOOST circuit according to claim 1, it is characterized in that: also include an input current source and a voltage source, the positive pole of described input current source is connected with the anode of described sustained diode 1, and the negative pole of described input current source is connected with the negative pole of described sustained diode 5；
The positive pole of described voltage source is connected with the negative electrode of described sustained diode 1, and the negative pole of described voltage source is connected with the positive pole of described sustained diode 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610264747.7A CN105720817A (en) | 2016-04-25 | 2016-04-25 | PFC soft switching circuit of BOOST circuit |
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| CN201610264747.7A CN105720817A (en) | 2016-04-25 | 2016-04-25 | PFC soft switching circuit of BOOST circuit |
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Cited By (7)
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| CN106877695A (en) * | 2017-03-21 | 2017-06-20 | 佛山市新光宏锐电源设备有限公司 | A kind of pair of Sofe Switch rectification charging multiplex circuit of boost structures |
| CN108418409A (en) * | 2018-03-19 | 2018-08-17 | 青岛大学 | Cache peak voltage switching tube and the Switching Power Supply topology with the switching tube |
| CN110350783A (en) * | 2018-04-08 | 2019-10-18 | 佛山科学技术学院 | A kind of boost module for UPS |
| CN110417257A (en) * | 2018-04-26 | 2019-11-05 | 广州道动新能源有限公司 | BUCK Sofe Switch module, BUCK circuit, "-" type and T font tri-level circuit |
| CN110649810A (en) * | 2019-08-15 | 2020-01-03 | 华为技术有限公司 | DC-DC conversion circuit |
| CN110957908A (en) * | 2019-12-18 | 2020-04-03 | 山东大学 | Bidirectional DC-DC soft switching circuit and wide-range soft switching control method |
| CN111509980A (en) * | 2019-01-31 | 2020-08-07 | 台达电子工业股份有限公司 | Power converter |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877695A (en) * | 2017-03-21 | 2017-06-20 | 佛山市新光宏锐电源设备有限公司 | A kind of pair of Sofe Switch rectification charging multiplex circuit of boost structures |
| CN108418409A (en) * | 2018-03-19 | 2018-08-17 | 青岛大学 | Cache peak voltage switching tube and the Switching Power Supply topology with the switching tube |
| CN110350783A (en) * | 2018-04-08 | 2019-10-18 | 佛山科学技术学院 | A kind of boost module for UPS |
| CN110417257A (en) * | 2018-04-26 | 2019-11-05 | 广州道动新能源有限公司 | BUCK Sofe Switch module, BUCK circuit, "-" type and T font tri-level circuit |
| CN110417257B (en) * | 2018-04-26 | 2021-04-23 | 广州道动新能源有限公司 | BUCK soft switch module, BUCK circuit, one-word type and T-word type three-level circuit |
| CN111509980A (en) * | 2019-01-31 | 2020-08-07 | 台达电子工业股份有限公司 | Power converter |
| CN111509980B (en) * | 2019-01-31 | 2021-04-13 | 台达电子工业股份有限公司 | Power converter |
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| CN110649810A (en) * | 2019-08-15 | 2020-01-03 | 华为技术有限公司 | DC-DC conversion circuit |
| US11894762B2 (en) | 2019-08-15 | 2024-02-06 | Huawei Digital Power Technologies Co., Ltd. | Direct current-direct current conversion circuit |
| CN110957908A (en) * | 2019-12-18 | 2020-04-03 | 山东大学 | Bidirectional DC-DC soft switching circuit and wide-range soft switching control method |
| CN110957908B (en) * | 2019-12-18 | 2020-10-30 | 山东大学 | Bidirectional DC-DC soft switching circuit and wide-range soft switching control method |
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