CN104158243B - Uninterrupted power supply circuit and control method thereof - Google Patents
Uninterrupted power supply circuit and control method thereof Download PDFInfo
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- CN104158243B CN104158243B CN201410382382.9A CN201410382382A CN104158243B CN 104158243 B CN104158243 B CN 104158243B CN 201410382382 A CN201410382382 A CN 201410382382A CN 104158243 B CN104158243 B CN 104158243B
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Abstract
The invention discloses a kind of uninterrupted power supply circuit and control method thereof, belong to field of power supplies. Described circuit comprises: be connected in parallel on three bridge arm topological circuits and bus capacitor between BUS positive output end and BUS negative output terminal; With the two-way charger circuit being mounted on BUS positive output end and BUS negative output terminal; Two-way charger circuit, comprising: the first switching tube, second switch pipe, transformer and storage capacitor; Wherein, energy storage capacitor in series is connected between the positive pole and BUS positive output end of battery, and the negative pole of battery is directly connected with BUS negative output terminal; The first end on the former limit of transformer is connected with the positive pole of battery, and second end on the former limit of transformer is connected with BUS negative output terminal through the first switching tube; The first end of the secondary of transformer is connected with the positive pole of battery, and the second end of the secondary of transformer is connected with BUS positive output end through second switch pipe. The present invention has improved repeated use of device rate, has reduced circuit design redundancy, has reached and has reduced costs and volume, the object of increasing work efficiency.
Description
Technical field
The present invention relates to field of power supplies, particularly a kind of uninterrupted power supply circuit and control method thereof.
Background technology
UPS (Uninterruptiblepowersupply, uninterrupted power source) system has been widely used in various power supply occasions. UPS is mainly used in as load provides continual supply of electric power, and when civil power is inputted when normal, UPS can be supplied to load to use after civil power voltage stabilizing, and UPS is now exactly an electric main voltage-stablizer, and it also charges to self-contained battery simultaneously; In the time that the situation such as interruption occurs civil power, UPS starts self-contained battery immediately, and the electric energy that battery is provided carries out temporary power supply to load after boosting.
Please refer to Fig. 1, it shows the circuit diagram of the uninterrupted power supply circuit of relevant a kind of three bridge arm topologicals, and this uninterrupted power supply circuit comprises: three bridge arm topological circuits 12, charger circuit 14, amplifier circuit 16 and bus capacitor C1. Wherein, three bridge arm topological circuits 12 comprise: the first brachium pontis that the first switching tube Q1 and second switch pipe Q2 series connection form, is also called PFC (PowerFactorCorrection, PFC) side high frequency brachium pontis; The second brachium pontis that the 3rd switching tube Q3 and the 4th switching tube Q4 series connection form, is also called the shared power frequency brachium pontis of PFC and INV (Inverter, inverter); The 3rd brachium pontis that 5th switching tube Q5 and the six switching tube Q6 series connection is formed, is also known as the high frequency brachium pontis of INV side; And, the first inductance L1, the second inductance L2 and output capacitance Co. First brachium pontis, the second brachium pontis and the 3rd brachium pontis are also connected between BUS (bus) positive output end and BUS negative output terminal. The first inductance L 1 is the high-frequency inductor of PFC side; Second inductance L2 is the high-frequency inductor of INV side. Bus capacitor C1 and be connected in BUS positive output end and BUS negative output terminal between. In addition, charger circuit 14 and amplifier circuit 16 articulate respectively with BUS positive output end and BUS negative output terminal on.
Input when normal when civil power, this uninterrupted power supply circuit works in charger pattern, is also called Buck (step-down) pattern, and BUS voltage charges for battery BAT by charger circuit 14, and now amplifier circuit 16 is in idle condition; When situations such as civil power generation interruptions, this uninterrupted power supply circuit works in discharger pattern, is also known as Boost (boosting) pattern, and battery BAT is charged for BUS by amplifier circuit 16, and now charger circuit 14 is in idle condition.
Realizing in process of the present invention, inventor finds that above-mentioned technology at least exists following problem: in above-mentioned uninterrupted power supply circuit, need one independently charger circuit and one independently amplifier circuit respectively battery is carried out to charging and discharging, cause circuit level and devices use rate not high, increased circuit cost and volume simultaneously.
Summary of the invention
Not high in order to solve the circuit level that exists in above-mentioned technology and devices use rate, and circuit cost and the bigger problem of volume, embodiments provide a kind of uninterrupted power supply circuit and control method thereof. Described technical scheme is as follows:
First aspect, a kind of uninterrupted power supply circuit is provided, and described circuit comprises: be connected in parallel on three bridge arm topological circuits between bus BUS positive output end and BUS negative output terminal, be connected in parallel on the bus capacitor between described BUS positive output end and described BUS negative output terminal and be mounted on described BUS positive output end and described BUS negative output terminal on two-way charger circuit;
Described two-way charger circuit, comprising: the first switching tube, second switch pipe, transformer and storage capacitor;
Wherein, described energy storage capacitor in series is connected between the positive pole and described BUS positive output end of battery, and the negative pole of described battery is directly connected with described BUS negative output terminal; The first end on the former limit of described transformer is connected with the positive pole of described battery, and second end on the former limit of described transformer is connected with described BUS negative output terminal through described the first switching tube; The first end of the secondary of described transformer is connected with the positive pole of described battery, and the second end of the secondary of described transformer is connected with described BUS positive output end through described second switch pipe.
In the first possible embodiment of first aspect, described two-way charger circuit, also include: resonant inductance；And, the first resonant capacitance and/or the second resonant capacitance；
When the first end of described second switch pipe is the one end being connected with described BUS positive output end, and when the second end of described second switch pipe is the one end being connected with the second end of the secondary of described transformer, described resonant inductance series connection is between the second end of the secondary of described transformer and the second end of described second switch pipe;
Described first resonant capacitance and described first paralleled power switches；
Described the second resonant capacitance is in parallel with described second switch pipe.
In conjunction with the possible embodiment of the first of first aspect, in the possible embodiment of the second of first aspect,
Described resonant inductance is external inductance independently; Or described resonant inductance is the built-in induct of being realized by the leakage inductance of described transformer.
In conjunction with first aspect, in the third possible embodiment of first aspect, described two-way charger circuit, also comprises: the first electric capacity and the second electric capacity;
Described the first electric capacity and described the first paralleled power switches;
Described the second electric capacity is in parallel with described second switch pipe.
In conjunction with the third possible embodiment of first aspect, the first possible embodiment of first aspect, the possible embodiment of the second of first aspect or first aspect, in the 4th kind of possible embodiment of first aspect,
Described first switching tube and described second switch pipe are the semiconductor switch pipe without internal diode；
Or,
Described first switching tube and described second switch pipe are the semiconductor switch pipe with internal diode；
Or,
Described first switching tube and described second switch pipe are the reverse parallel connection of diode and semiconductor switch pipe and combine。
Second aspect, it is provided that the control method of a kind of uninterrupted power supply circuit, described method is for controlling the uninterrupted power supply circuit as described in first aspect and arbitrary possible embodiment thereof, and described method includes:
Under Buck pattern, charge for described battery by controlling described first switching tube and turning on and off of described second switch pipe；
Under Boost pattern, charge for described bus capacitor by controlling described first switching tube and turning on and off of described second switch pipe。
In the first possible embodiment of second aspect, described charge for described battery by controlling described first switching tube and turning on and off of described second switch pipe, including:
When described first switching tube and described second switch pipe are the semiconductor switch pipe without internal diode, or when described first switching tube and described second switch pipe are the semiconductor switch pipe with internal diode, or when described first switching tube and described second switch pipe are the reverse parallel connection combination of diode and semiconductor switch pipe, turn off open-minded with described second switch pipe by controlling described first switching tube, make described bus capacitor, described second switch pipe, the secondary of described transformator, the loop storage electric energy that described battery is formed, described electric energy is stored in the secondary of described transformator；Open and the shutoff of described second switch pipe by controlling described first switching tube, make described electric energy transfer that the secondary of described transformator stores to the former limit of described transformator, described battery, described first switching tube, described transformator to discharge described electric energy be the charging of described battery to the loop that formed, former limit；
Or,
When described first switching tube and described second switch pipe are the semiconductor switch pipe with internal diode, or when described first switching tube and described second switch pipe are the reverse parallel connection combination of diode and semiconductor switch pipe, turn off open-minded with described second switch pipe by controlling described first switching tube, making the loop storage electric energy that described bus capacitor, described second switch pipe, the secondary of described transformator, described battery are formed, described electric energy is stored in the secondary of described transformator；Turn off and the shutoff of described second switch pipe by controlling described first switching tube, make described electric energy transfer that the secondary of described transformator stores to the former limit of described transformator, described battery, the described diode that described first switching tube comprises, described transformator to discharge described electric energy be the charging of described battery to the loop that formed, former limit。
In conjunction with second aspect, in the embodiment that the second is possible, the described bus capacitor charging turned on and off as being connected in parallel between described BUS positive output end and described BUS negative output terminal by controlling described first switching tube and described second switch pipe, including:
When described first switching tube and described second switch pipe are the semiconductor switch pipe without internal diode, or when described first switching tube and described second switch pipe are the semiconductor switch pipe with internal diode, or when described first switching tube and described second switch pipe are the reverse parallel connection combination of diode and semiconductor switch pipe, open and the shutoff of described second switch pipe by controlling described first switching tube, make described battery, the former limit of described transformator, the loop storage electric energy that described first switching tube is formed, described electric energy is stored in the former limit of described transformator；Turn off open-minded with described second switch pipe by controlling described first switching tube, making described electric energy transfer that the former limit of described transformator stores to the secondary of described transformator, it is the charging of described bus capacitor that the loop that described battery, the secondary of described transformator, described second switch pipe, described bus capacitor are formed discharges described electric energy；
Or,
When described first switching tube and described second switch pipe are the semiconductor switch pipe with internal diode, or when described first switching tube and described second switch pipe are the reverse parallel connection combination of diode and semiconductor switch pipe, open and the shutoff of described second switch pipe by controlling described first switching tube, making the loop storage electric energy that described battery, the former limit of described transformator, described first switching tube are formed, described electric energy is stored in the former limit of described transformator；Turn off and the shutoff of described second switch pipe by controlling described first switching tube, making described electric energy transfer that the former limit of described transformator stores to the secondary of described transformator, it is the charging of described bus capacitor that the loop that the described diode that described battery, the secondary of described transformator, described second switch pipe comprise, described bus capacitor are formed discharges described electric energy。
The technical scheme that the embodiment of the present invention provides has the benefit that
By mounting two-way charger circuit on BUS positive output end and BUS negative output terminal, two-way charging circuit is utilized to realize the battery BAT in circuit is charged and discharged；Solve the circuit level existed in background technology and devices use rate is not high, and circuit cost and the bigger problem of volume；Compared to the uninterrupted power supply circuit related in background technology, charger circuit and amplifier circuit have been carried out multiplexing by the uninterrupted power supply circuit that the present embodiment provides, a transformator and a switching tube are at least saved, improve repeated use of device rate, reduce circuit design redundancy, reach the purpose reducing cost and volume, simultaneously raising circuit work efficiency。
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in the embodiment of the present invention, below the accompanying drawing used required during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings。
Fig. 1 is the circuit diagram of the uninterrupted power supply circuit of a kind of three bridge arm topologicals related in background technology；
Fig. 2 is the circuit diagram of the uninterrupted power supply circuit that one embodiment of the invention provides；
Fig. 3 A is the circuit diagram of the uninterrupted power supply circuit that another embodiment of the present invention provides；
Fig. 3 B is the current diagram of the uninterrupted power supply circuit of embodiment of the present invention offer first stage under Buck pattern；
Fig. 3 C is the current diagram of the uninterrupted power supply circuit of embodiment of the present invention offer second stage under Buck pattern；
Fig. 3 D is the current diagram of the uninterrupted power supply circuit of embodiment of the present invention offer phase III under Boost pattern；
Fig. 3 E is the current diagram of the uninterrupted power supply circuit of embodiment of the present invention offer fourth stage under Boost pattern；
Fig. 4 A is the circuit diagram of the uninterrupted power supply circuit that yet another embodiment of the invention provides；
Fig. 4 B is the circuit diagram of the uninterrupted power supply circuit that a further embodiment of the present invention provides；
Fig. 4 C is the circuit diagram of the uninterrupted power supply circuit that a further embodiment of the present invention provides；
Fig. 5 is the circuit diagram of the uninterrupted power supply circuit that a further embodiment of the present invention provides；
Fig. 6 is the method flow diagram of the control method of a kind of uninterrupted power supply circuit that one embodiment of the invention provides。
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail。
Refer to Fig. 2, it illustrates the circuit diagram of the uninterrupted power supply circuit that one embodiment of the invention provides。This uninterrupted power supply circuit includes: is connected in parallel on three bridge arm topological circuits 22 between BUS positive output end and BUS negative output terminal, the bus capacitor C1 being connected in parallel between BUS positive output end and BUS negative output terminal and is mounted on the two-way charger circuit 24 on BUS positive output end and BUS negative output terminal。
Two-way charger circuit 24, including: the first switching tube Q1, second switch pipe Q2, transformator TX1 and storage capacitor C2。
Wherein, storage capacitor C2 series connection is between the positive pole and BUS positive output end of battery BAT, and the negative pole of battery BAT is directly connected with BUS negative output terminal。
First end of former limit P1 of transformator TX1 is connected with the positive pole of battery BAT, and second end of the former limit P1 of transformator TX1 is connected through the first switching tube Q1 and BUS negative output terminal；First end of the secondary S1 of transformator TX1 is connected with the positive pole of battery BAT, and second end of the secondary S1 of transformator TX1 is connected through second switch pipe Q2 and BUS positive output end。
In sum, the uninterrupted power supply circuit that the present embodiment provides, by mounting two-way charger circuit on BUS positive output end and BUS negative output terminal, utilize two-way charging circuit to realize the battery BAT in circuit is charged and discharged；Solve the circuit level existed in background technology and devices use rate is not high, and circuit cost and the bigger problem of volume；Compared to the uninterrupted power supply circuit related in background technology, charger circuit and amplifier circuit have been carried out multiplexing by the uninterrupted power supply circuit that the present embodiment provides, a transformator and a switching tube are at least saved, improve repeated use of device rate, reduce circuit design redundancy, reach the purpose reducing cost and volume, simultaneously raising circuit work efficiency。
Refer to Fig. 3 A, it illustrates the circuit diagram of the uninterrupted power supply circuit that another embodiment of the present invention provides。This uninterrupted power supply circuit includes: is connected in parallel on three bridge arm topological circuits 22 between BUS positive output end and BUS negative output terminal, the bus capacitor C1 being connected in parallel between BUS positive output end and BUS negative output terminal and is mounted on the two-way charger circuit 24 on BUS positive output end and BUS negative output terminal。
Three bridge arm topological circuits 22, including: the first brachium pontis that the 3rd switching tube Q3 and the four switching tube Q4 series connection is formed, the second brachium pontis that the 5th switching tube Q5 and the six switching tube Q6 series connection is formed, the 3rd brachium pontis that the 7th switching tube Q7 and the eight switching tube Q8 series connection is formed。Above-mentioned first brachium pontis, the second brachium pontis and the 3rd brachium pontis are connected in parallel between BUS positive output end and BUS negative output terminal。
Concrete, the first brachium pontis is also known as PFC side high frequency brachium pontis。The first termination BUS positive output end of the 3rd switching tube Q3, first end of second termination the 4th switching tube Q4 of the 3rd switching tube Q3, the second termination BUS negative output terminal of the 4th switching tube Q4。The common port that 3rd switching tube Q3 and the four switching tube Q4 connects is called the midpoint of the first brachium pontis。
Second brachium pontis is also known as PFC and the INV power frequency brachium pontis shared。The first termination BUS positive output end of the 5th switching tube Q5, first end of second termination the 6th switching tube Q6 of the 5th switching tube Q5, the second termination BUS negative output terminal of the 6th switching tube Q6。The common port that 5th switching tube Q5 and the six switching tube Q6 connects is called the midpoint of the second brachium pontis。
3rd brachium pontis is also known as INV side high frequency brachium pontis。The first termination BUS positive output end of the 7th switching tube Q7, first end of second termination the 8th switching tube Q8 of the 7th switching tube Q7, the second termination BUS negative output terminal of the 8th switching tube Q8。The common port that 7th switching tube Q7 and the eight switching tube Q8 connects is called the midpoint of the 3rd brachium pontis。
As shown in Figure 3A, three bridge arm topological circuits 22, also include: the first inductance L1, the second inductance L2 and output capacitance Co。
First inductance L1 is PFC side high-frequency inductor。The midpoint of first termination first brachium pontis of the first inductance L1, AC_L (live wire) end of the second termination alternating current power supply AC of the first inductance L1。
The midpoint of the second brachium pontis connects AC_N (zero line) end of alternating current power supply AC。
Second inductance L2 is INV side high-frequency inductor。The midpoint of first termination the 3rd brachium pontis of the second inductance L2, second termination output loading and the output capacitance C of the second inductance L2oThe first end, output capacitance CoSecond termination alternating current power supply AC AC_N end。
As shown in Figure 3A, two-way charger circuit 24, including: the first switching tube Q1, second switch pipe Q2, transformator TX1 and storage capacitor C2。
Wherein, storage capacitor C2 series connection is between the positive pole and BUS positive output end of battery BAT, and the negative pole of battery BAT is directly connected with BUS negative output terminal。
First end of former limit P1 of transformator TX1 is connected with the positive pole of battery BAT, and second end of the former limit P1 of transformator TX1 is connected through the first switching tube Q1 and BUS negative output terminal；First end of the secondary S1 of transformator TX1 is connected with the positive pole of battery BAT, and second end of the secondary S1 of transformator TX1 is connected through second switch pipe Q2 and BUS positive output end。
Concrete, first end of former limit P1 of transformator TX1 is connected with the positive pole of battery BAT, and second end of the former limit P1 of transformator TX1 and first end of the first switching tube Q1 are connected, and second end of the first switching tube Q1 is connected with BUS negative output terminal。First end of the secondary S1 of transformator TX1 is connected with the positive pole of battery BAT, and second end of the secondary S1 of transformator TX1 is connected with second end of second switch pipe Q2, and first end of second switch pipe Q2 is connected with BUS positive output end。
Additionally, this uninterrupted power supply circuit also includes control circuit (not shown), this control circuit can produce control signal in the control pole of the first switching tube Q1 and second switch pipe Q2, this control circuit can control the first switching tube Q1 and second switch pipe Q2 and switch between different opening states and off state according to predetermined policy, to be embodied as battery BAT charging or to discharge for battery BAT。
Concrete, when civil power is normal, by controlling turning on and off of the first switching tube Q1 and second switch pipe Q2 so that two-way charger circuit 24 works in Buck pattern, by being that battery BAT charges from power taking BUS on；When the situation such as interrupting, voltage is relatively low at civil power, by controlling turning on and off of the first switching tube Q1 and second switch pipe Q2 so that two-way charger circuit 24 works in Boost pattern, by from battery BAT power taking being the bus capacitor C1 charging on BUS。
It addition, the first switching tube Q1 and second switch pipe Q2 is the semiconductor switch pipe without internal diode；Or, the first switching tube Q1 and second switch pipe Q2 is the semiconductor switch pipe with internal diode；Or, the first switching tube Q1 and second switch pipe Q2 is the reverse parallel connection of diode and semiconductor switch pipe and combines。
Concrete, when the first switching tube Q1 and second switch pipe Q2 is the semiconductor switch pipe without internal diode, first switching tube Q1 and second switch pipe Q2 can be transistor, can also be the insulated gate bipolar transistor IGBT without internal diode, it is also possible to be the metal-oxide semiconductor (MOS) metal-oxide-semiconductor without internal diode。
When the first switching tube Q1 and second switch pipe Q2 is the semiconductor switch pipe with internal diode, the first switching tube Q1 and second switch pipe Q2 can be the IGBT with internal diode, it is also possible to be the MOSFET with internal diode。Wherein, when the first switching tube Q1 and second switch pipe Q2 is the IGBT with internal diode, IGBT includes an audion and a diode；The colelctor electrode of audion is connected with the negative electrode of diode, constitutes first end of IGBT；The emitter stage of audion is connected with the anode of diode, constitutes second end of IGBT。When the first switching tube Q1 and second switch pipe Q2 is the MOSFET with internal diode, MOSFET includes a metal-oxide-semiconductor and a diode；The source electrode of metal-oxide-semiconductor is connected with the negative electrode of diode, constitutes first end of MOSFET；The drain electrode of metal-oxide-semiconductor is connected with the anode of diode, constitutes second end of MOSFET。
When the first switching tube Q1 and second switch pipe Q2 is the reverse parallel connection combination of diode and semiconductor switch pipe, diode and semiconductor switch pipe connected mode in circuit are referred to the above-mentioned IGBT with internal diode or the MOSFET with internal diode, repeat no more。
Different with the composition structure of second switch pipe Q2 according to the first switching tube Q1, present embodiments provide the following two kinds possible implementation and UPS circuit is controlled:
In the implementation that the first is possible, the first switching tube Q1 and diode can be comprised in second switch pipe Q2, it is also possible to do not comprise diode。Now, under Buck pattern, the process for battery BAT charging can be divided into first stage and second stage；Under Boost pattern, the process for bus capacitor C1 charging can be divided into phase III and fourth stage。Wherein:
First stage is: the first switching tube Q1 turns off and second switch pipe Q2 is open-minded。Now, the loop that bus capacitor C1, second switch pipe Q2, the secondary S1 of transformator TX1, battery BAT are formed stores electric energy, and electric energy is stored in the secondary S1 of transformator TX1。As shown in Figure 3 B, the current direction in circuit is: the secondary S1 of bus capacitor C1 → second switch pipe Q2 → transformator TX1 → battery BAT → bus capacitor C1, constitutes the tank circuit of Buck pattern。
Second stage is: the first switching tube Q1 opens and second switch pipe Q2 turns off。Now, the electric energy transfer of the secondary S1 storage of transformator TX1 is that battery BAT charges to the former limit P1 of the former limit P1, battery BAT of transformator TX1, the first switching tube Q1, the transformator TX1 loop formed release electric energy。As shown in Figure 3 C, the current direction in circuit is: the former limit P1 of the former limit P1 of transformator TX1 → battery BAT → the first switching tube Q1 → transformator TX1, constitutes the continuous current circuit of Buck pattern。
First stage under above-described Buck pattern and second stage constitute the charging process of battery BAT。
Phase III is: the first switching tube Q1 opens and second switch pipe Q2 turns off。Now, the loop storage electric energy that battery BAT, the former limit P1 of transformator TX1, the first switching tube Q1 are formed, electric energy is stored in the former limit P1 of transformator TX1。As shown in Figure 3 D, the current direction in circuit is: the former limit P1 → the first switching tube Q1 → battery BAT of battery BAT → transformator TX1, constitutes the tank circuit of Boost pattern。
Fourth stage is: the first switching tube Q1 turns off and second switch pipe Q2 is open-minded。Now, the electric energy transfer of the former limit P1 storage of transformator TX1 is bus capacitor C1 charging to the loop release electric energy that the secondary S1, battery BAT of transformator TX1, the secondary S1 of transformator TX1, second switch pipe Q2, bus capacitor C1 are formed。As shown in FIGURE 3 E, the current direction in circuit is: the secondary S1 of battery BAT → transformator TX1 → second switch pipe Q2 → bus capacitor C1 → battery BAT, constitutes the continuous current circuit of Boost pattern。
Phase III under above-described Boost pattern and fourth stage constitute the discharge process of battery BAT。
In the implementation that the second is possible, the first switching tube Q1 and include diode in second switch pipe Q2, this diode can be the internal diode of semiconductor switch pipe, it is also possible to be the independent diode with semiconductor switch pipe reverse parallel connection。Now, under Buck pattern, the process for battery BAT charging can be divided into the 5th stage and the 6th stage；Under Boost pattern, the process for bus capacitor C1 charging can be divided into the 7th stage and the 8th stage。Wherein:
5th stage was: the first switching tube Q1 turns off and second switch pipe Q2 is open-minded。Now the current direction in circuit is as shown in Figure 3 B: the secondary S1 of bus capacitor C1 → second switch pipe Q2 → transformator TX1 → battery BAT → bus capacitor C1, constitutes the tank circuit of Buck pattern。
6th stage was: the first switching tube Q1 turns off and second switch pipe Q2 turns off。Now the current direction in circuit is as shown in Figure 3 C: the former limit P1 of diode → transformator TX1 that the former limit P1 of transformator TX1 → battery BAT → the first switching tube Q1 comprises, and constitutes the continuous current circuit of Buck pattern。
7th stage was: the first switching tube Q1 opens and second switch pipe Q2 turns off。Now the current direction in circuit is as shown in Figure 3 D: the former limit P1 → the first switching tube Q1 → battery BAT of battery BAT → transformator TX1, constitutes the tank circuit of Boost pattern。
8th stage was: the first switching tube Q1 turns off and second switch pipe Q2 turns off。Now the current direction in circuit is as shown in FIGURE 3 E: the diode that the secondary S1 of battery BAT → transformator TX1 → second switch pipe Q2 comprises → bus capacitor C1 → battery BAT, constitutes the continuous current circuit of Boost pattern。
In sum, the uninterrupted power supply circuit that the present embodiment provides, by mounting two-way charger circuit on BUS positive output end and BUS negative output terminal, utilize two-way charging circuit to realize the battery BAT in circuit is charged and discharged；Solve the circuit level existed in background technology and devices use rate is not high, and circuit cost and the bigger problem of volume；Compared to the uninterrupted power supply circuit related in background technology, charger circuit and amplifier circuit have been carried out multiplexing by the uninterrupted power supply circuit that the present embodiment provides, a transformator and a switching tube are at least saved, improve repeated use of device rate, reduce circuit design redundancy, reach the purpose reducing cost and volume, simultaneously raising circuit work efficiency。
Additionally, the uninterrupted power supply circuit that the present embodiment provides, switches between different opening states and off state also by controlling the first switching tube Q1 and second switch pipe Q2, when civil power is normal, make two-way charger circuit work in Buck pattern, by from power taking on BUS be battery BAT charging；When the situation such as interrupting, voltage is relatively low at civil power, two-way charger circuit is made to work in Boost pattern, by from battery BAT power taking being the bus capacitor C1 charging on BUS, achieve two-way charger circuit carry out stable between Buck pattern and Boost pattern and switch efficiently, the reliability and stability of circuit are fully ensured that, improve the power density of circuit, it is achieved that effective integrated UPS design。
Refer to Fig. 4 A, it illustrates the circuit diagram of the uninterrupted power supply circuit that yet another embodiment of the invention provides。This uninterrupted power supply circuit includes: is connected in parallel on three bridge arm topological circuits 22 between BUS positive output end and BUS negative output terminal, the bus capacitor being connected in parallel between described BUS positive output end and described BUS negative output terminal and is mounted on the two-way charger circuit 24 on BUS positive output end and BUS negative output terminal。
The circuit structure of three bridge arm topological circuits 22 is discussed in detail in Fig. 3 A illustrated embodiment, and referring specifically to Fig. 3 A illustrated embodiment, the present embodiment repeats no more。
As shown in Figure 4 A, two-way charger circuit 24, including: the first switching tube Q1, second switch pipe Q2, transformator TX1 and storage capacitor C2。
Wherein, storage capacitor C2 series connection is between the positive pole and BUS positive output end of battery BAT, and the negative pole of battery BAT is directly connected with BUS negative output terminal。
First end of former limit P1 of transformator TX1 is connected with the positive pole of battery BAT, and second end of the former limit P1 of transformator TX1 is connected through the first switching tube Q1 and BUS negative output terminal；First end of the secondary S1 of transformator TX1 is connected with the positive pole of battery BAT, and second end of the secondary S1 of transformator TX1 is connected through second switch pipe Q2 and BUS positive output end。
Wherein, the first switching tube Q1 and second switch pipe Q2 is used for realizing two-way charging circuit 24 and switches between Buck pattern and Boost pattern。Storage capacitor C2 both can play energy storage effect, can play again the effect of filtering as filter capacitor。
As shown in Figure 4 A, two-way charger circuit 24, also include: resonant inductance Lf；And, the first resonant capacitance C3 and the second resonant capacitance C4。
When first end of second switch pipe Q2 is the one end being connected with BUS positive output end, and the second end that second end of second switch pipe Q2 is secondary S1 with transformator TX1 be connected one end time, resonant inductance Lf series connection is between second end and second end of second switch pipe Q2 of the secondary S1 of transformator TX1。First resonant capacitance C3 and the first switching tube Q1 is in parallel。Second resonant capacitance C4 is in parallel with second switch pipe Q2。
In the present embodiment, LLC resonant tank is constituted by resonant inductance Lf, transformator TX1, the first resonant capacitance C3 and the second resonant capacitance C4, the first switching tube Q1 and second switch pipe Q2 is made to be capable of turning on and off of no-voltage or zero current, namely " Sofe Switch ", switching loss and electromagnetic interference can be eliminated, improve charger efficiency。
It addition, as shown in figs. 4 b and 4 c, in the embodiment that other is possible, LLC resonant tank can save a first resonant capacitance C3, or save a second resonant capacitance C4。Now the first switching tube Q1 and second switch pipe Q2 is capable of turning on and off of no-voltage or zero current namely " Sofe Switch " equally。
It should be noted is that: in above-mentioned Fig. 4 A, Fig. 4 B and Fig. 4 C illustrated embodiment, be only illustrated with resonant inductance Lf for independent external inductance。In the embodiment that other is possible, it is also possible to utilizing the leakage inductance of transformator TX1 to replace resonant inductance Lf, the leakage inductance by means of transformator TX1 forms LLC resonant tank。
It addition, the different operating mode of circuit, switching in above-mentioned Fig. 3 A illustrated embodiment between Buck pattern and Boost pattern is discussed in detail, and referring specifically to Fig. 3 A illustrated embodiment, the present embodiment repeats no more。
In sum, the uninterrupted power supply circuit that the present embodiment provides, by mounting two-way charger circuit on BUS positive output end and BUS negative output terminal, utilize two-way charging circuit to realize the battery BAT in circuit is charged and discharged；Solve the circuit level existed in background technology and devices use rate is not high, and circuit cost and the bigger problem of volume；Compared to the uninterrupted power supply circuit related in background technology, charger circuit and amplifier circuit have been carried out multiplexing by the uninterrupted power supply circuit that the present embodiment provides, a transformator and a switching tube are at least saved, improve repeated use of device rate, reduce circuit design redundancy, reach the purpose reducing cost and volume, simultaneously raising circuit work efficiency。
Additionally, the uninterrupted power supply circuit that the present embodiment provides, also by arranging resonant inductance Lf, the first resonant capacitance C3 and the second resonant capacitance C4 in two-way charger circuit, the first switching tube Q1 and second switch pipe Q2 is made to be capable of turning on and off of no-voltage or zero current, namely " Sofe Switch ", eliminate switching loss and electromagnetic interference, improve charger efficiency。
Also need to illustrate a bit: above-mentioned Fig. 4 A, Fig. 4 B and Fig. 4 C illustrated embodiment only with pass through resonant inductance Lf, the first resonant capacitance C3 and the second resonant capacitance C4 are set in two-way charger circuit 24, to constitute LLC resonant tank so that the first switching tube Q1 and second switch pipe Q2 is capable of Sofe Switch and controls to be illustrated。
As it is shown in figure 5, in the embodiment that other is possible, two-way charger circuit 24 can only include: the first electric capacity C5 and the second electric capacity C6。Wherein, the first electric capacity C5 and the first switching tube Q1 is in parallel, and the second electric capacity C6 is in parallel with second switch pipe Q2。Now, although LLC resonant tank cannot be formed, but the first switching tube Q1 and second switch pipe Q2 remains able to normal operation under hard switching pattern。In the present embodiment, the first electric capacity C5 and the second electric capacity C6, for absorbing the first switching tube Q1 and the shutoff due to voltage spikes of second switch pipe Q2, reduces the turn-off power loss of switching tube, improves charger efficiency。
Refer to Fig. 6, it illustrates the method flow diagram of the control method of a kind of uninterrupted power supply circuit that one embodiment of the invention provides, the method is for controlling the uninterrupted power supply circuit related in above-mentioned Fig. 2, Fig. 3 A, Fig. 4 A or embodiment illustrated in fig. 5, and the method includes:
Step 602, under Buck pattern, charges for battery by controlling the first switching tube and turning on and off of second switch pipe。
In the implementation that the first is possible, when the first switching tube and second switch pipe are the semiconductor switch pipe without internal diode, or when the first switching tube and second switch pipe are the semiconductor switch pipe with internal diode, or when the first switching tube and second switch pipe are the reverse parallel connection combination of diode and semiconductor switch pipe, turn off open-minded with second switch pipe by controlling the first switching tube, making the loop storage electric energy that bus capacitor, second switch pipe, the secondary of transformator, battery are formed, electric energy is stored in the secondary of transformator；By controlling the first switching tube and open and second switch pipe turning off so that the electric energy transfer of the secondary of transformator storage is to the former limit of transformator, and battery, the first switching tube, loop release electric energy that the former limit of transformator is formed are battery charging。
In the implementation that the second is possible, when the first switching tube and second switch pipe are the semiconductor switch pipe with internal diode, or when the first switching tube and second switch pipe are the reverse parallel connection combination of diode and semiconductor switch pipe, turn off open-minded with second switch pipe by controlling the first switching tube, making the loop storage electric energy that bus capacitor, second switch pipe, the secondary of transformator, battery are formed, electric energy is stored in the secondary of transformator；Turn off and the shutoff of second switch pipe by controlling the first switching tube so that the electric energy transfer of the secondary storage of transformator is to the former limit of transformator, and diode, the loop release electric energy of the former limit formation of transformator that battery, the first switching tube comprise are battery charging。
Step 604, under Boost pattern, charges for bus capacitor by controlling the first switching tube and turning on and off of second switch pipe。
Corresponding to the first possible implementation above-mentioned, when the first switching tube and second switch pipe are the semiconductor switch pipe without internal diode, or when the first switching tube and second switch pipe are the semiconductor switch pipe with internal diode, or when the first switching tube and second switch pipe are the reverse parallel connection combination of diode and semiconductor switch pipe, open and the shutoff of second switch pipe by controlling the first switching tube, making the loop storage electric energy that battery, the former limit of transformator, the first switching tube are formed, electric energy is stored in the former limit of transformator；Turn off open-minded with second switch pipe by controlling the first switching tube so that the electric energy transfer of the former limit storage of transformator is to the secondary of transformator, and the loop release electric energy that battery, the secondary of transformator, second switch pipe, bus capacitor are formed is bus capacitor charging。
Corresponding to the implementation that above-mentioned the second is possible, when the first switching tube and second switch pipe are the semiconductor switch pipe with internal diode, or when the first switching tube and second switch pipe are the reverse parallel connection combination of diode and semiconductor switch pipe, open and the shutoff of second switch pipe by controlling the first switching tube, making the loop storage electric energy that battery, the former limit of transformator, the first switching tube are formed, electric energy is stored in the former limit of transformator；Turn off and the shutoff of second switch pipe by controlling the first switching tube, making electric energy transfer that the former limit of transformator stores to the secondary of transformator, the loop release electric energy that diode that battery, the secondary of transformator, second switch pipe comprise, bus capacitor are formed is bus capacitor charging。
Above-mentioned control method has been discussed in detail in Fig. 3 A illustrated embodiment and has illustrated, referring specifically to Fig. 3 A illustrated embodiment, repeats no more in the present embodiment。
It should be appreciated that it is used in the present context, unless exceptional case clearly supported in context, singulative " " (" a ", " an ", " the ") is intended to also include plural form。It is to be further understood that "and/or" used herein refer to one or the more than one project listed explicitly arbitrarily and likely combine。
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment。
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can be completed by hardware, can also be completed by the hardware that program carrys out instruction relevant, described program can be stored in a kind of computer-readable recording medium, storage medium mentioned above can be read only memory, disk or CD etc.。
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention。
Claims (8)
1. a uninterrupted power supply circuit, it is characterized in that, described circuit includes: the bus capacitor that be connected in parallel on three bridge arm topological circuits between bus BUS positive output end and BUS negative output terminal, is connected in parallel between described BUS positive output end and described BUS negative output terminal and be mounted on the two-way charger circuit on described BUS positive output end and described BUS negative output terminal；
Described two-way charger circuit, including: the first switching tube, second switch pipe, transformator and storage capacitor；
Wherein, described energy storage capacitor in series is connected between the positive pole of battery and described BUS positive output end, and the negative pole of described battery is directly connected with described BUS negative output terminal；First end on the former limit of described transformator is connected with the positive pole of described battery, and second end on the former limit of described transformator is connected with described BUS negative output terminal through described first switching tube；First end of the secondary of described transformator is connected with the positive pole of described battery, and the second end of the secondary of described transformator is connected with described BUS positive output end through described second switch pipe。
2. uninterrupted power supply circuit according to claim 1, it is characterised in that described two-way charger circuit, also includes: resonant inductance；And, the first resonant capacitance and/or the second resonant capacitance；
When the first end of described second switch pipe is the one end being connected with described BUS positive output end, and the second end that the second end of described second switch pipe is secondary with described transformator be connected one end time, described resonant inductance series connection is between second end and the second end of described second switch pipe of the secondary of described transformator；
Described first resonant capacitance and described first paralleled power switches；
Described second resonant capacitance is in parallel with described second switch pipe。
3. uninterrupted power supply circuit according to claim 2, it is characterised in that
Described resonant inductance is independent external inductance；Or, described resonant inductance is the built-in inductance realized by the leakage inductance of described transformator。
4. uninterrupted power supply circuit according to claim 1, it is characterised in that described two-way charger circuit, also includes: the first electric capacity and the second electric capacity；
Described first electric capacity and described first paralleled power switches；
Described second electric capacity is in parallel with described second switch pipe。
5. according to the arbitrary described uninterrupted power supply circuit of Claims 1-4, it is characterised in that
Described first switching tube and described second switch pipe are the semiconductor switch pipe without internal diode；
Or,
Described first switching tube and described second switch pipe are the semiconductor switch pipe with internal diode；
Or,
Described first switching tube and described second switch pipe are the reverse parallel connection of diode and semiconductor switch pipe and combine。
6. the control method of a uninterrupted power supply circuit, it is characterised in that described method for control as arbitrary in claim 1 to 5 as described in uninterrupted power supply circuit, described method includes:
Under Buck pattern, charge for described battery by controlling described first switching tube and turning on and off of described second switch pipe；
Under Boost pattern, charge for described bus capacitor by controlling described first switching tube and turning on and off of described second switch pipe。
7. method according to claim 6, it is characterised in that described charge for described battery by controlling described first switching tube and turning on and off of described second switch pipe, including:
When described first switching tube and described second switch pipe are the semiconductor switch pipe without internal diode, or when described first switching tube and described second switch pipe are the semiconductor switch pipe with internal diode, or when described first switching tube and described second switch pipe are the reverse parallel connection combination of diode and semiconductor switch pipe, turn off open-minded with described second switch pipe by controlling described first switching tube, make described bus capacitor, described second switch pipe, the secondary of described transformator, the loop storage electric energy that described battery is formed, described electric energy is stored in the secondary of described transformator；Open and the shutoff of described second switch pipe by controlling described first switching tube, make described electric energy transfer that the secondary of described transformator stores to the former limit of described transformator, described battery, described first switching tube, described transformator to discharge described electric energy be the charging of described battery to the loop that formed, former limit；
Or,
When described first switching tube and described second switch pipe are the semiconductor switch pipe with internal diode, or when described first switching tube and described second switch pipe are the reverse parallel connection combination of diode and semiconductor switch pipe, turn off open-minded with described second switch pipe by controlling described first switching tube, making the loop storage electric energy that described bus capacitor, described second switch pipe, the secondary of described transformator, described battery are formed, described electric energy is stored in the secondary of described transformator；Turn off and the shutoff of described second switch pipe by controlling described first switching tube, make described electric energy transfer that the secondary of described transformator stores to the former limit of described transformator, described battery, the described diode that described first switching tube comprises, described transformator to discharge described electric energy be the charging of described battery to the loop that formed, former limit。
8. method according to claim 6, it is characterised in that the described bus capacitor charging turned on and off as being connected in parallel between described BUS positive output end and described BUS negative output terminal by controlling described first switching tube and described second switch pipe, including:
When described first switching tube and described second switch pipe are the semiconductor switch pipe without internal diode, or when described first switching tube and described second switch pipe are the semiconductor switch pipe with internal diode, or when described first switching tube and described second switch pipe are the reverse parallel connection combination of diode and semiconductor switch pipe, open and the shutoff of described second switch pipe by controlling described first switching tube, make described battery, the former limit of described transformator, the loop storage electric energy that described first switching tube is formed, described electric energy is stored in the former limit of described transformator；Turn off open-minded with described second switch pipe by controlling described first switching tube, making described electric energy transfer that the former limit of described transformator stores to the secondary of described transformator, it is the charging of described bus capacitor that the loop that described battery, the secondary of described transformator, described second switch pipe, described bus capacitor are formed discharges described electric energy；
Or,
When described first switching tube and described second switch pipe are the semiconductor switch pipe with internal diode, or when described first switching tube and described second switch pipe are the reverse parallel connection combination of diode and semiconductor switch pipe, open and the shutoff of described second switch pipe by controlling described first switching tube, making the loop storage electric energy that described battery, the former limit of described transformator, described first switching tube are formed, described electric energy is stored in the former limit of described transformator；Turn off and the shutoff of described second switch pipe by controlling described first switching tube, making described electric energy transfer that the former limit of described transformator stores to the secondary of described transformator, it is the charging of described bus capacitor that the loop that the described diode that described battery, the secondary of described transformator, described second switch pipe comprise, described bus capacitor are formed discharges described electric energy。
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| CN104467169B (en) * | 2014-12-26 | 2016-10-05 | 深圳警翼数码科技有限公司 | A kind of uninterrupted power supply device |
| CN104682705B (en) * | 2015-02-13 | 2017-06-20 | 华为技术有限公司 | A kind of DC two-way changing circuit and power supply |
| DE102016005079A1 (en) * | 2016-04-27 | 2017-11-02 | Finepower Gmbh | Device and method for mains current storage and stand-alone grid generation with shared switching elements for half-wave polarity switching |
| CN106208700A (en) * | 2016-08-30 | 2016-12-07 | 长沙广义变流技术有限公司 | A kind of two-way DC/DC Sofe Switch control system, method and the hybrid power system of port machine |
| CN107733236B (en) * | 2017-10-27 | 2019-11-12 | 深圳市保益新能电气有限公司 | A kind of two-way Sofe Switch DC transfer circuit of wide scope and its control method |
| CN110425174A (en) * | 2019-07-24 | 2019-11-08 | 许继电源有限公司 | Fan speed regulating circuit, multi-channel parallel fan speed regulating circuit |
| CN115136443A (en) * | 2020-05-22 | 2022-09-30 | 广州视源电子科技股份有限公司 | Three-bridge-arm topology device, control method, inversion system and uninterruptible power supply system |
| CN111478408A (en) * | 2020-05-22 | 2020-07-31 | 广州视源电子科技股份有限公司 | Three-bridge-arm topology device, control method and uninterruptible power supply system |
| CN212210538U (en) * | 2020-05-22 | 2020-12-22 | 广州视源电子科技股份有限公司 | Three-bridge-arm topology device and uninterruptible power supply system |
| CN112467989B (en) * | 2020-10-29 | 2022-01-07 | 杭州电子科技大学 | Quasi-single-stage high-power-factor alternating current-direct current converter |
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| CN1074600C (en) * | 1998-08-31 | 2001-11-07 | 深圳市安圣电气有限公司 | Topologic circuit of DC-DC soft switch power change |
| US7193396B2 (en) * | 2003-12-24 | 2007-03-20 | Potentia Semiconductor Corporation | DC converters having buck or boost configurations |
| CN101222148A (en) * | 2008-01-25 | 2008-07-16 | 华为技术有限公司 | Power supplying method and device of uninterrupted power supply |
| CN102163918B (en) * | 2010-09-13 | 2013-05-08 | 南京航空航天大学 | Bi-directional direct current (DC) converter with active clamping ZVS (zero voltage switch) |
| CN103683473B (en) * | 2013-12-11 | 2015-11-25 | 华为技术有限公司 | A kind of three bridge arm topological circuits and control method, uninterruptible power system |
| CN103780099A (en) * | 2014-01-21 | 2014-05-07 | 广东易事特电源股份有限公司 | Bi-directional direct current switching circuit and switching power supply |
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