CN102832688A - Uninterruptible power supply - Google Patents
Uninterruptible power supply Download PDFInfo
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- CN102832688A CN102832688A CN2011101638270A CN201110163827A CN102832688A CN 102832688 A CN102832688 A CN 102832688A CN 2011101638270 A CN2011101638270 A CN 2011101638270A CN 201110163827 A CN201110163827 A CN 201110163827A CN 102832688 A CN102832688 A CN 102832688A
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Abstract
The invention discloses an uninterruptible power supply which comprises a subunit and a switch tube driving module, wherein the subunit comprises a first bridge arm formed by a first controllable switch and a second controllable switch, a second bridge arm formed by a third controllable switch and a fourth controllable switch, a third bridge arm formed by a fifth controllable switch and a sixth controllable switch, a first inductor, a bus capacitor, a second inductor, a second capacitor, a first switch and a second switch; the uninterruptible power supply also comprises a battery; a positive pole of the battery is coupled with a first end of the second switch, a second end of the second switch is coupled with a first end of the first inductor, and a negative pole of the battery is coupled with a negative pole of the bus capacitor; or the positive pole of the battery is coupled with a positive pole of the bus capacitor, the negative pole of the battery is coupled with the first end of the second switch, and the second end of the second switch is coupled with the first end of the first inductor. Due to the improvement in the hanging connection type of the battery, a circuit can work in a mode of the battery, and the control algorithm of the two controllable switches in the second bridge arm can be simplified.
Description
[technical field]
The present invention relates to power electronic device, particularly relate to a kind of uninterrupted power supply.
[background technology]
As shown in Figure 1, be the existing uninterrupted power supply circuit diagram of (Uninterruptible Power Supply is called for short UPS); Among the figure, UPS comprises subelement, and subelement comprises first brachium pontis that the first gate-controlled switch Q1, the second gate-controlled switch Q2 link to each other and form; Second brachium pontis that the 3rd gate-controlled switch Q3, the 4th gate-controlled switch Q4 link to each other and form; The 3rd brachium pontis that the 5th gate-controlled switch Q5, the 6th gate-controlled switch Q6 link to each other and form, first inductance L 1, bus capacitor DC1; Second inductance L, 2, the second capacitor C 2, first switch S 1 and second switch S2; First end of first switch S 1 and civil power input coupling; First end coupling of second end of first switch S 1 and first inductance L 1; Second end of first inductance L 1 and the coupling of the mid point of first brachium pontis; First brachium pontis, second brachium pontis and the 3rd brachium pontis are connected across positive pole and the negative pole of bus capacitor DC1 respectively, and the mid point of second brachium pontis is coupled to center line N, first end coupling of the mid point of the 3rd brachium pontis and second inductance L 2; First end coupling of second end of second inductance L 2 and second capacitor C 2, second end of second capacitor C 2 is coupled to center line N.Also comprise battery BATTERY among the UPS, the positive pole of battery BATTERY is through first end coupling of the second switch S2 and first inductance L 1, and the negative pole of battery BATTERY and center line are coupled.
In the above-mentioned UPS circuit; First inductance L 1; Diode composition power factor correction (Power Factor Correction is called for short PFC) circuit in the body of diode and the 4th gate-controlled switch Q4 in the body of the first gate-controlled switch Q1, the second gate-controlled switch Q2, the 3rd gate-controlled switch Q3.The 3rd gate-controlled switch Q3, the 4th gate-controlled switch Q4, the 5th gate-controlled switch Q5, the 6th gate-controlled switch Q6 and second inductance L 2, second capacitor C 2 are formed full bridge inverters.After the power factor correction of pfc circuit; Its input current becomes with input synchronous sine wave of civil power and harmonic content less; Pfc circuit is made the AC/DC converter simultaneously; With importing the direct voltage that civil power converts bus capacitor DC1 two ends into, full bridge inverter is that high-quality sinusoidal voltage offers load with the direct voltage inversion at bus capacitor DC1 two ends then.In the circuit, because second brachium pontis of the 3rd gate-controlled switch Q3, the 4th gate-controlled switch Q4 composition is shared by pfc circuit and full bridge inverter, so has used less switching tubes in the circuit, the cost of circuit is lower.Simultaneously because the inverter current of the rectified current of pfc circuit and inverter circuit in the opposite direction through the gate-controlled switch (Q3 or Q4) of second brachium pontis in most cases; Can offset major part; So the electric current of flowing through among the 3rd gate-controlled switch Q3 and the 4th gate-controlled switch Q4 is little; Loss power above that is just little, so the loss of circuit is also less.
Yet foregoing circuit; Realize operate as normal; The drive signal that needs complicated each gate-controlled switch of control algolithm generation is to control the operating state of each gate-controlled switch; Especially the 3rd gate-controlled switch Q3 of second brachium pontis and the 4th gate-controlled switch Q4 in the circuit, shared by pfc circuit and full bridge inverter because of second brachium pontis of its composition, the drive controlling algorithm that two controlled switches are corresponding is complicated.
In addition, existing UPS also comprises the switching tube driver module except that comprising above-mentioned subelement.As shown in Figure 2; Circuit diagram for the switching tube driver module; The switching tube driver module comprises front-end filtering module 1, intermediate isolating coupling module 2 and rear end driver module 3; The switching tube drive control signal DRV1 of the input receiving key pipe driver module previous stage output of front-end filtering module 1 carries out Filtering Processing to it, and first output terminals A of front-end filtering module 1 connects the first input end C of intermediate isolating coupling module 2; The second output B of front-end filtering module 1 also is the second input D that earth terminal connects intermediate isolating coupling module 2.The first output F of intermediate isolating coupling module 2 connects the input I of rear end driver module 3, and the second output E connects the positive power line V+ of rear end driver module 3, and the 3rd output G connects the negative power line V-of rear end driver module 3.The drive signal output L of rear end driver module 3 connects the control end that is positioned at the switching tube (like the second gate-controlled switch Q2, the 4th gate-controlled switch Q4 and the 6th gate-controlled switch Q6) of brachium pontis lower end in the UPS subelement, the negative pole of the center line M connection bus electric capacity DC1 of rear end driver module 3.
How the switching tube driver module being improved, to reduce the device cost of whole UPS, also is the direction that those skilled in the art make great efforts.
[summary of the invention]
Technical problem to be solved by this invention is: remedy the deficiency of above-mentioned prior art, propose a kind of uninterrupted power supply, can simplify the 3rd gate-controlled switch Q3 in second brachium pontis and the corresponding drive controlling algorithm of the 4th gate-controlled switch Q4 in the circuit relatively.
The further technical problem to be solved of the present invention is: remedy the deficiency of above-mentioned prior art, propose a kind of uninterrupted power supply, through to the improvement of switching tube driver module to reduce the device cost of whole UPS.
Technical problem of the present invention solves through following technical scheme:
A kind of uninterrupted power supply comprises subelement and switching tube driver module, and said subelement comprises first brachium pontis that first gate-controlled switch links to each other with second gate-controlled switch and forms; Second brachium pontis that the 3rd gate-controlled switch links to each other with the 4th gate-controlled switch and forms; The 3rd brachium pontis that the 5th gate-controlled switch links to each other with the 6th gate-controlled switch and forms, first inductance, bus capacitor; Second inductance, second electric capacity, first switch and second switch; First end of said first switch and civil power input coupling; Second end of said first switch and the coupling of first end of said first inductance; Second end of said first inductance and the coupling of the mid point of said first brachium pontis; Said first brachium pontis, second brachium pontis and the 3rd brachium pontis are connected across the positive pole and the negative pole of said bus capacitor respectively, and the mid point of said second brachium pontis is coupled to center line, first end coupling of the mid point of said the 3rd brachium pontis and said second inductance; Second end of said second inductance and the coupling of first end of said second electric capacity, second end of said second electric capacity is coupled to center line; It is characterized in that: said uninterrupted power supply also comprises battery; First end coupling of the positive pole of said battery and said second switch, second end of said second switch and the coupling of first end of said first inductance, the negative pole of said battery and the coupling of the negative pole of said bus capacitor; Or, the positive pole of said battery and the coupling of the positive pole of said bus capacitor, first end coupling of the negative pole of said battery and said second switch, second end of said second switch and the coupling of first end of said first inductance.
In the optimized technical scheme,
Said subelement also comprises first electric capacity, the negative pole coupling of positive pole coupling, second end and the said battery of said first electric capacity, first end and said battery.
In the further optimized technical scheme,
Said subelement also comprises the 3rd inductance, and the mid point of said second brachium pontis is inductively coupled to center line through the said the 3rd.
Said switching tube driver module comprises front-end filtering module and rear end driver module; First output of said front-end filtering module connects the input of said rear end driver module; The earth terminal of said front-end filtering module directly links to each other with the center line of said rear end driver module, the negative pole coupling of the center line of said rear end driver module and the bus capacitor (DC1) in the said subelement.
The beneficial effect of the present invention and prior art contrast is:
Uninterrupted power supply of the present invention; Through battery being articulated the improvement of form; Make when circuit is worked under battery mode; Come out from pfc circuit fully by " release " for two gate-controlled switches (Q3, Q4) in second brachium pontis; Then when circuit was worked down from civil power mode switch to battery mode, the control algolithm that no longer need change two gate-controlled switches (Q3, Q4) was burnt to avoid it, and the control algolithm of gate-controlled switch under battery mode (Q3, Q4) still can be prolonged with the control algolithm under city's power mode; Both do not comprised that control algolithm also comprised control algolithm two parts content under the battery mode under city's power mode during the control algolithm of gate-controlled switch (Q3, Q4) is existing for another example, only comprised this part content of control algolithm under city's power mode but be reduced to.Moreover; Because under the battery mode; Come out from pfc circuit fully by " release " for two gate-controlled switches (Q3, Q4); Even still distinguish the two-part control algolithm of design according to city's power mode and battery mode, because two controlled switches (Q3, Q4) only need be responsible for the work of inverter circuit under the battery mode, the control algolithm in the relative prior art of control algolithm that then two controlled switches (Q3, Q4) battery mode is corresponding down under the battery mode is also simplified a lot; Even by the designing two portions control algolithm, control algolithm integral body also can obtain simplifying.Further, uninterrupted power supply of the present invention, the switching tube driver module among the UPS, the earth terminal of front-end filtering module is connected with the center line of rear end driver module altogether, can save the use of intermediate isolating coupling module, reduces the device cost of whole UPS.
[description of drawings]
Fig. 1 is the circuit diagram of uninterrupted power supply in the prior art;
Fig. 2 is the switching tube driver module circuit diagram in the uninterrupted power supply in the prior art;
Fig. 3 is the circuit diagram of uninterrupted power supply in the specific embodiment of the invention one;
Fig. 4 a is power mode current direction figure during first inductive energy storage in pfc circuit when down the positive half cycle of input is exported positive half cycle in uninterrupted power supply city in the specific embodiment of the invention one;
Fig. 4 b is the current direction figure of uninterrupted power supply city power mode when first inductive energy storage is transferred to bus capacitor in the pfc circuit when down the positive half cycle of input is exported positive half cycle in the specific embodiment of the invention one;
Fig. 4 c is the current direction figure of uninterrupted power supply city power mode when inverter circuit median generatrix capacitance energy storage is transferred to second inductance when down the positive half cycle of input is exported positive half cycle in the specific embodiment of the invention one;
Fig. 4 d is the current direction figure of uninterrupted power supply city power mode when second inductive energy storage is transferred to second electric capacity in the inverter circuit when down the positive half cycle of input is exported positive half cycle in the specific embodiment of the invention one;
Fig. 5 a is the power mode following current direction figure during first inductive energy storage in pfc circuit during input negative half period output negative half period in uninterrupted power supply city in the specific embodiment of the invention one;
Fig. 5 b is the current direction figure when first inductive energy storage was transferred to bus capacitor in the pfc circuit when uninterrupted power supply city power mode was imported negative half period output negative half period down in the specific embodiment of the invention one;
Fig. 5 c is the current direction figure when inverter circuit median generatrix capacitance energy storage was transferred to second inductance when uninterrupted power supply city power mode was imported negative half period output negative half period down in the specific embodiment of the invention one;
Fig. 5 d is the current direction figure when second inductive energy storage was transferred to second electric capacity in the inverter circuit when uninterrupted power supply city power mode was imported negative half period output negative half period down in the specific embodiment of the invention one;
Fig. 6 a is the current direction figure during first inductive energy storage of the pfc circuit under the uninterrupted power supply battery mode in the prior art;
Fig. 6 b is the current direction figure when being transferred to bus capacitor during first inductive energy storage of the pfc circuit under the uninterrupted power supply battery mode in the prior art;
Fig. 7 a is the current direction figure during first inductive energy storage of the pfc circuit under the uninterrupted power supply battery mode in the specific embodiment of the invention one;
Fig. 7 b is the current direction figure when first inductive energy storage of the pfc circuit under the uninterrupted power supply battery mode is transferred to bus capacitor in the specific embodiment of the invention one;
Fig. 8 is the circuit diagram of uninterrupted power supply in the specific embodiment of the invention two;
Fig. 9 a is the current direction figure during first inductive energy storage of the pfc circuit under the uninterrupted power supply battery mode in the specific embodiment of the invention two;
Fig. 9 b is the current direction figure when first inductive energy storage of the pfc circuit under the uninterrupted power supply battery mode is transferred to bus capacitor in the specific embodiment of the invention two;
Figure 10 is the circuit diagram of uninterrupted power supply in the specific embodiment of the invention three;
Figure 11 is the circuit diagram of uninterrupted power supply in the specific embodiment of the invention four;
Figure 12 is the circuit diagram of uninterrupted power supply in the specific embodiment of the invention five;
Figure 13 is the circuit diagram of uninterrupted power supply in the specific embodiment of the invention six;
Figure 14 is the circuit diagram of uninterrupted power supply in the specific embodiment of the invention seven;
Figure 15 is the circuit diagram of uninterrupted power supply in the specific embodiment of the invention eight;
Figure 16 is the circuit diagram of uninterrupted power supply in the specific embodiment of the invention nine;
Figure 17 is the circuit diagram of uninterrupted power supply in the specific embodiment of the invention ten;
Figure 18 is the switching tube driver module circuit diagram in the uninterrupted power supply in the specific embodiment of the invention 11.
[embodiment]
Below in conjunction with embodiment and contrast accompanying drawing the present invention is explained further details.
Embodiment one
As shown in Figure 3, be the circuit diagram of uninterrupted power supply in this embodiment, uninterrupted power supply comprises switching tube driver module (not shown), subelement 100 and battery BATTERY.Subelement 100 comprises first brachium pontis that the first gate-controlled switch Q1 links to each other with the second gate-controlled switch Q2 and forms; Second brachium pontis that the 3rd gate-controlled switch Q3 links to each other with the 4th gate-controlled switch Q4 and forms; The 3rd brachium pontis that the 5th gate-controlled switch Q5 links to each other with the 6th gate-controlled switch Q6 and forms, first inductance L 1, bus capacitor DC1; Second inductance L, 2, the second capacitor C 2, first switch S 1 and second switch S2.In the subelement 100; First end of first switch S 1 and civil power input coupling; First end coupling of second end of first switch S 1 and first inductance L 1, second end of first inductance L 1 and the coupling of the mid point of first brachium pontis, first brachium pontis, second brachium pontis and the 3rd brachium pontis are connected across positive pole and the negative pole of bus capacitor DC1 respectively; The mid point of second brachium pontis is coupled to center line N; First end coupling of the mid point of the 3rd brachium pontis and second inductance L 2, first end coupling of second end of second inductance L 2 and second capacitor C 2, second end of second capacitor C 2 is coupled to center line N.The annexation of battery BATTERY and subelement is first end coupling of the positive pole of battery BATTERY and second switch S2, first end coupling of second end of second switch S2 and first inductance L 1, the negative pole coupling of the negative pole of battery BATTERY and bus capacitor DC1.With respect to existing UPS circuit, the negative pole of battery BATTERY no longer is articulated on the center line, but directly is connected on the negative pole of bus capacitor DC1.
The above-mentioned first gate-controlled switch Q1, the second gate-controlled switch Q2, the 3rd gate-controlled switch Q3, the 4th gate-controlled switch Q4, the 5th gate-controlled switch Q5 and the 6th gate-controlled switch Q6 are the gate-controlled switch of same type; The gate-controlled switch of said same type can be metal oxide semiconductor field effect tube, insulated gate bipolar transistor, power transistor, turn-off thyristor, MOS (Metal-Oxide-Semiconductor, Metal-oxide-semicondutor) control thyristor, static induction transistor, static induction thyristor or integrated gate commutated thyristor etc.
In the above-mentioned subelement circuit, diode composition pfc circuit in the body of diode and the 4th gate-controlled switch Q4 in the body of first inductance L, 1, the first gate-controlled switch Q1, the second gate-controlled switch Q2, the 3rd gate-controlled switch Q3.The 3rd gate-controlled switch Q3, the 4th gate-controlled switch Q4, the 5th gate-controlled switch Q5, the 6th gate-controlled switch Q6 and second inductance L 2, second capacitor C 2 are formed inverter circuits.The circuit structure of pfc circuit and inverter circuit and operation principle are all identical with existing UPS, do not do repeat specification at this.
Foregoing circuit is as being operated in city's power mode following time, and is identical among the state of a control of each gate-controlled switch and the existing UPS, only does simple the description as follows.
When civil power was imported positive half cycle, circuit output also be positive half cycle, and then pfc circuit is operated in the positive half cycle, and inverter circuit also is operated in the positive half cycle, then need control: first gate-controlled switch Q1 shutoff; The second gate-controlled switch Q2 is according to the pulse-width signal high frequency chopping of PFC controlled quentity controlled variable and carrier wave generation; The 3rd gate-controlled switch Q3 turn-offs; The 4th gate-controlled switch Q4 conducting; The 5th gate-controlled switch Q5 is according to the drive signal high frequency chopping of inversion control amount and carrier wave generation, and the 6th gate-controlled switch Q6 and the 5th gate-controlled switch Q5 are complementary to work.In the pfc circuit, current circuit is shown in dotted arrow among Fig. 4 a during 1 energy storage of first inductance L, and current circuit was shown in dotted arrow among Fig. 4 b when energy storage was transferred to bus capacitor DC1 in first inductance L 1; In the inverter circuit, current circuit was shown in dotted arrow among Fig. 4 c when energy storage was released into second inductance L 2 among the bus capacitor DC1, and current circuit was shown in dotted arrow among Fig. 4 d when energy storage was released into second capacitor C 2 in second inductance L 2.
During civil power input negative half period, circuit output also is negative half period, and then pfc circuit is operated in the negative half period, and inverter circuit also is operated in the negative half period, then need control: the first gate-controlled switch Q1 is according to the pulse-width signal high frequency chopping of PFC controlled quentity controlled variable and carrier wave generation; The second gate-controlled switch Q2 turn-offs; The 3rd gate-controlled switch Q3 conducting; The 4th gate-controlled switch Q4 turn-offs; The 6th gate-controlled switch Q6 is according to the drive signal high frequency chopping of inversion control amount and carrier wave generation, and the 5th gate-controlled switch Q5 and the 6th gate-controlled switch Q6 are complementary to work.In the pfc circuit, current circuit is shown in dotted arrow among Fig. 5 a during 1 energy storage of first inductance L, and current circuit was shown in dotted arrow among Fig. 5 b when energy storage was transferred to bus capacitor DC1 in first inductance L 1; In the inverter circuit, current circuit was shown in dotted arrow among Fig. 5 c when energy storage was released into second inductance L 2 among the bus capacitor DC1, and current circuit was shown in dotted arrow among Fig. 5 d when energy storage was released into second capacitor C 2 in second inductance L 2.
Foregoing circuit is as working under the battery mode, the work of each gate-controlled switch of inverter circuit part still with existing UPS in identical in the inverter circuit, in the pfc circuit work of each gate-controlled switch then with existing UPS in different in the pfc circuit.
In the existing UPS circuit under the battery mode in the pfc circuit current direction figure as shown in Figure 6.Fig. 6 a is existing UPS current direction figure during 1 energy storage of first inductance L in the pfc circuit under battery mode.At this moment, electric current is 1 energy storage of first inductance L along battery BATTERY positive pole → second switch S2 → first inductance L, 1 → the second gate-controlled switch Q2 → the 4th gate-controlled switch Q4 → center line N → battery BATTERY negative pole.Fig. 6 b is existing UPS current direction figure when 1 energy storage of first inductance L is released into bus capacitor DC1 in the pfc circuit under battery mode.At this moment, electric current is bus capacitor DC1 charging along battery BATTERY positive pole → second switch S2 → first inductance L, 1 → the first gate-controlled switch Q1 → bus capacitor DC1 → the 4th gate-controlled switch Q4 → center line N → battery BATTERY negative pole.
And in this embodiment in the UPS circuit under the battery mode in the pfc circuit current direction figure as shown in Figure 7.Among Fig. 7 a UPS circuit current direction figure during 1 energy storage of first inductance L in the pfc circuit under battery mode in this embodiment.At this moment, electric current is 1 energy storage of first inductance L along battery BATTERY positive pole → second switch S2 → first inductance L, 1 → the second gate-controlled switch Q2 → battery BATTERY negative pole.Among Fig. 7 b current direction figure when 1 energy storage of first inductance L is released into bus capacitor DC1 in the pfc circuit under the battery mode.At this moment, electric current is bus capacitor DC1 charging along battery BATTERY positive pole → second switch S2 → first inductance L, 1 → the first gate-controlled switch Q1 → bus capacitor DC1 → battery BATTERY negative pole.
Comparison diagram 6 can be known with the current circuit among Fig. 7; UPS in this embodiment is in battery mode following time; No longer need the participation of two gate-controlled switches (Q3, Q4) in second brachium pontis in the pfc circuit; The task that two gate-controlled switches (Q3, Q4) only need be born in the inverter circuit gets final product, and can simplify the corresponding drive controlling algorithm of the 3rd gate-controlled switch Q3 and the 4th gate-controlled switch Q4 so relatively.Concrete analysis is:
Reason to the 3rd gate-controlled switch Q3 and the 4th gate-controlled switch Q4 control algolithm are very complicated in the existing UPS circuit is analyzed; On the one hand; Because second brachium pontis that the 3rd gate-controlled switch Q3, the 4th gate-controlled switch Q4 form is shared by pfc circuit and full bridge inverter; Make two controlled switches all " hold " two duties; Being input as the positive half cycle power supply of civil power or directly battery-powered, be output as under the situation of the positive half cycle of inversion, need the 4th gate-controlled switch Q4 to take into account the work in pfc circuit and the inverter circuit simultaneously; Being input as civil power negative half period power supply or directly battery-powered, be output as under the situation of inversion negative half period, need the 3rd gate-controlled switch Q3 to take into account the work of pfc circuit and inverter circuit simultaneously.Therefore, because of the 3rd gate-controlled switch Q3, the 4th gate-controlled switch Q4 " hold " " dual identity " of two duties, other gate-controlled switch (Q1, Q2, Q3 and Q4) is complicated relatively for the corresponding control algolithm content of two controlled switches (Q3, Q4).On the other hand; When needs are worked circuit down from civil power mode switch to battery mode; For the long-time conducting of avoiding the 3rd gate-controlled switch Q3 and the 4th gate-controlled switch Q4 is burnt, need reset the drive controlling algorithm of the correspondence of the 3rd gate-controlled switch Q3 and the 4th gate-controlled switch Q4, and also promptly the control algolithm of the 3rd gate-controlled switch Q3 and the 4th gate-controlled switch Q4 comprises two parts; Work during a part corresponding city power mode, the work during the corresponding battery mode of another part.Therefore, also the control algolithm content of other gate-controlled switch is more relatively for the content of the 3rd gate-controlled switch Q3 and the 4th gate-controlled switch Q4 control algolithm.In sum, the control algolithm of the 3rd gate-controlled switch Q3, the 4th gate-controlled switch Q4 is complicated, and comprises two parts content and cause its control algolithm comparatively complicated.Articulate the change of form through battery in this embodiment; Make UPS in battery mode following time; No longer need the participation of two gate-controlled switches (Q3, Q4) in second brachium pontis in the pfc circuit; The task that two gate-controlled switches (Q3, Q4) only need be born in the inverter circuit gets final product, and then the control algolithm complexity reduces relatively.Simultaneously; Pfc circuit does not relate to the 3rd gate-controlled switch Q3 and the 4th gate-controlled switch Q4 during because of battery mode; Battery mode needn't burn for the long-time conducting of avoiding the 3rd gate-controlled switch Q3 and the 4th gate-controlled switch Q4 down and reset control algolithm like this; Still can continue to use the control algolithm under city's power mode under the battery mode, the content of control algolithm is reduction relatively also.Promptly articulate the change of form, and then simplified the 3rd gate-controlled switch Q3 and the corresponding drive controlling algorithm of the 4th gate-controlled switch Q4 relatively from algorithm complex and algorithm content aspect through battery.
Embodiment two
As shown in Figure 8; This embodiment is with the difference of execution mode one: the positive pole coupling of the positive pole of battery BATTERY and bus capacitor DC1; First end coupling of the negative pole of battery BATTERY and second switch S2, first end coupling of second end of second switch S2 and first inductance L 1.The battery of this kind form articulates, and equally also can realize simplifying the purpose of the corresponding drive controlling algorithm of the 3rd gate-controlled switch Q3 and the 4th gate-controlled switch Q4.
As shown in Figure 8, be the circuit diagram of uninterrupted power supply in this embodiment, comprise subelement 100 and battery BATTERY.Subelement 100 comprises first brachium pontis that the first gate-controlled switch Q1 links to each other with the second gate-controlled switch Q2 and forms; Second brachium pontis that the 3rd gate-controlled switch Q3 links to each other with the 4th gate-controlled switch Q4 and forms; The 3rd brachium pontis that the 5th gate-controlled switch Q5 links to each other with the 6th gate-controlled switch Q6 and forms, first inductance L 1, bus capacitor DC1; Second inductance L, 2, the second capacitor C 2, first switch S 1 and second switch S2.In the subelement 100; First end of first switch S 1 and civil power input coupling; First end coupling of second end of first switch S 1 and first inductance L 1, second end of first inductance L 1 and the coupling of the mid point of first brachium pontis, first brachium pontis, second brachium pontis and the 3rd brachium pontis are connected across positive pole and the negative pole of bus capacitor DC1 respectively; The mid point of second brachium pontis is coupled to center line N; First end coupling of the mid point of the 3rd brachium pontis and second inductance L 2, first end coupling of second end of second inductance L 2 and second capacitor C 2, second end of second capacitor C 2 is coupled to center line N.The annexation of battery BATTERY and subelement is the positive pole coupling of the positive pole of battery BATTERY and bus capacitor DC1, first end coupling of the negative pole of battery BATTERY and second switch S2, first end coupling of second end of second switch S2 and first inductance L 1.
In this embodiment in the UPS circuit under the battery mode in the pfc circuit current direction figure as shown in Figure 9.Among Fig. 9 a UPS circuit current direction figure during 1 energy storage of first inductance L in the pfc circuit under battery mode in this embodiment.At this moment, electric current is 1 energy storage of the → inductance L along the battery BATTERY positive pole → first gate-controlled switch Q1 → first inductance L, 1 → second switch S2 → battery BATTERY negative pole.Among Fig. 9 b current direction figure when 1 energy storage of first inductance L is released into bus capacitor DC1 in the pfc circuit under the battery mode.At this moment, electric current is bus capacitor DC1 charging along battery BATTERY positive pole → bus capacitor DC1 → second gate-controlled switch Q2 → first inductance L, 1 → second switch S2 → battery BATTERY negative pole.
From current direction figure shown in Figure 9; Can know that this battery articulates under the form; UPS does not need the participation of two gate-controlled switches (Q3, Q4) in second brachium pontis equally in battery mode following time in the pfc circuit, the task that two gate-controlled switches (Q3, Q4) only need be born in the inverter circuit gets final product; So also can simplify the corresponding drive controlling algorithm of the 3rd gate-controlled switch Q3 and the 4th gate-controlled switch Q4 relatively with in the execution mode one.
Embodiment three
Shown in figure 10, this embodiment is with the difference of execution mode one: subelement also comprises the positive pole coupling of first end and the battery BATTERY of first capacitor C, 1, the first capacitor C 1, the negative pole coupling of second end and battery BATTERY.
In this embodiment, connect first capacitor C 1, can effectively avoid the electric capacity position to place the total harmonic distortion of the improper UPS input current that causes (Total Harmonic Distortion of Current is called for short THDi) according to aforesaid way.This be because, common electric capacity connects method and is, first kind connects method: first capacitor C, 1 first end is linked to each other with first inductance L, 1 first end, and second end links to each other with center line N; Or the do improvement obtains second kind and connects method slightly, and first capacitor C, 1 first end is linked to each other with first inductance L, 1 first end, and second end links to each other with the bus capacitor negative pole.Above-mentioned two kinds connect in the method usually, and all there is the improper THDi index variation that is easy to cause UPS in the electric capacity position.
After connecing method and insert first capacitor C 1 according to first kind; Under the battery mode; Be prone to open loop of moment formation at the 3rd gate-controlled switch Q3, this loop is: bus capacitor DC1 positive pole → the 3rd gate-controlled switch Q3 → center line N → first capacitor C, 1 → second switch S2 → battery BATTERY positive pole → battery BATTERY negative pole → bus capacitor DC1 negative pole.
After connecing method and insert first capacitor C 1 according to first kind; Under the battery mode; Also be prone to open loop of moment formation at the 4th gate-controlled switch Q4, this loop is: battery BATTERY positive pole → second switch S2 → first capacitor C, 1 → center line N → the 4th gate-controlled switch Q4 → battery BATTERY negative pole.
After connecing method and insert the → capacitor C 1 according to second kind; Under city's power mode; When civil power is imported from positive half cycle to the negative half period zero passage; Also be prone to open loop of moment formation at the 3rd gate-controlled switch Q3, this loop is: mains electricity input end → first capacitor C, 1 → bus capacitor DC1 negative pole → bus capacitor DC1 positive pole → the 3rd gate-controlled switch Q3 → center line N.
After connecing method and insert first capacitor C 1 according to second kind, under city's power mode, the civil power input is during from negative half period to positive half cycle zero passage, also is prone to open moment at the 4th gate-controlled switch Q4 and constitutes a loop.This loop is: center line N → the 4th gate-controlled switch Q4 → first capacitor C, 1 → mains electricity input end.Simultaneously, also be easy to this moment open loop of moment formation at the second gate-controlled switch Q2, this loop is: first capacitor C, 1 → the first inductance L, 1 → the second gate-controlled switch Q2 → first capacitor C 1.
Form electric current in the loop that said circumstances constitutes down, this formation electric current promptly causes the input current waveform distortion of UPS, causes the THDi index variation of UPS.And after inserting first capacitor C 1 according to the mode in this embodiment, the connection of first capacitor C 1 can't constitute above-mentioned loop, therefore can avoid forming the THDi index variation that electric current causes UPS.Though to connect method less with the distinctive points that connects method usually for improved first capacitor C 1 in this embodiment, can overcome those skilled in the art's technological prejudice.
Embodiment four
Shown in figure 11, this embodiment is with the difference of execution mode two: subelement also comprises the positive pole coupling of first end and the battery BATTERY of first capacitor C, 1, the first capacitor C 1, the negative pole coupling of second end and battery BATTERY.Connect on the basis of battery in embodiment two, connect first capacitor C 1 according to aforesaid way again, can avoid first capacitor C 1 to connect improper formation loop equally and form the THDi index variation that electric current causes UPS.
Embodiment five
Shown in figure 12, this embodiment is with the difference of execution mode one: subelement comprises that also the mid point of the 3rd inductance L 3, the second brachium pontis is coupled to center line N through the 3rd inductance L 3.Through setting up the 3rd inductance L 3, can reduce the coupling of UPS importation and output.
Embodiment six
Shown in figure 13, this embodiment is with the difference of execution mode two: subelement comprises that also the mid point of the 3rd inductance L 3, the second brachium pontis is coupled to center line N through the 3rd inductance L 3.Through setting up the 3rd inductance L 3, can reduce the coupling of UPS importation and output.
Embodiment seven
As an embodiment; Shown in figure 14; This embodiment is with the difference of execution mode one: subelement also comprises the 3rd switch S 3; First end coupling of the positive pole of battery BATTERY and second switch S2, first end coupling of second end of second switch S2 and first inductance L 1, the negative pole of battery BATTERY is through the negative pole coupling of the 3rd switch S 3 with bus capacitor DC1.
Embodiment eight
As an embodiment; Shown in figure 15; This embodiment is with the difference of execution mode two: subelement also comprises the 3rd switch S 3; The positive pole of battery BATTERY is through the positive pole coupling of the 3rd switch S 3 with bus capacitor DC1, first end coupling of the negative pole of battery BATTERY and second switch S2, first end coupling of second end of second switch S2 and first inductance L 1.
Embodiment nine
Shown in figure 16, this embodiment is with the difference of execution mode one: comprise three sub-cells, be respectively first subelement, 100, the second subelements, 200, the three subelements 300.The structure of each subelement is with the subelement in the embodiment one.Wherein, First end of second switch S2 in the positive pole of battery BATTERY and first subelement 100, the second switch S12 in second subelement 200, the second switch S22 in the 3rd subelement 300 is coupled respectively, and the negative pole of the bus capacitor DC1 in the negative pole of battery BATTERY and first subelement 100, the bus capacitor DC11 in second subelement 200, the bus capacitor DC21 in the 3rd subelement 300 is coupled respectively.UPS in this embodiment is 3 UPS in the execution mode one and is connected in parallel, and realizes the application of the public battery BATTERY of 3 sub-cells parallel operation, reduces system cost, can obtain 3 times power output simultaneously.
Embodiment ten
Shown in figure 17, this embodiment is with the difference of execution mode one: comprise three sub-cells, be respectively first subelement, 100, the second subelements, 200, the three subelements 300.The structure of each subelement is with the subelement in the embodiment two.Wherein, The positive pole of bus capacitor DC1 in the positive pole of battery BATTERY and first subelement 100, the bus capacitor DC11 in second subelement 200, the bus capacitor DC21 in the 3rd subelement 300 is coupled respectively, and first end of the second switch S2 in the negative pole of battery BATTERY and first subelement 100, the second switch S12 in second subelement 200, the second switch S22 in the 3rd subelement 300 is coupled respectively.UPS in this embodiment is 3 UPS in the execution mode two and is connected in parallel, and realizes the application of the public battery BATTERY of 3 sub-cells parallel operation, reduces system cost, can obtain 3 times power output simultaneously.
UPS in this embodiment makes improvement to the switching tube driver module.Shown in figure 18, be the circuit diagram of the switching tube driver module among the UPS in this embodiment.The switching tube driver module comprises front-end filtering module 1 and rear end driver module 3; First output terminals A of front-end filtering module 1 connects the input I of rear end driver module 3; The second output B of front-end filtering module 1; Also be earth terminal, be connected to the negative pole of the bus capacitor DC1 in the UPS subelement after direct center line M with end driver module 3 links to each other.Also be; The center line M of the earth terminal of front-end filtering module 1 and rear end driver module 3 (negative pole of common bus electric capacity DC1 is as the ground end) altogether is connected; Therefore the use that can save the intermediate isolating coupling module with respect to switching tube driver module of the prior art in the switching tube driver module in this embodiment reduces the device cost of whole UPS.Use the switching tube driver module in three these embodiments to drive the switching tube that is positioned at the brachium pontis lower end in the UPS subelement respectively; The i.e. second gate-controlled switch Q2, the 4th gate-controlled switch Q4 and the 6th gate-controlled switch Q6; Can save the use of 3 isolation coupling modules, realize low-cost.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, make some substituting or obvious modification under the prerequisite of the present invention design not breaking away from, and performance or purposes are identical, all should be regarded as belonging to protection scope of the present invention.
Claims (9)
1. a uninterrupted power supply comprises subelement and switching tube driver module, and said subelement comprises first brachium pontis that first gate-controlled switch (Q1) links to each other with second gate-controlled switch (Q2) and forms; Second brachium pontis that the 3rd gate-controlled switch (Q3) links to each other with the 4th gate-controlled switch (Q4) and forms; The 3rd brachium pontis that the 5th gate-controlled switch (Q5) links to each other with the 6th gate-controlled switch (Q6) and forms, first inductance (L1), bus capacitor (DC1); Second inductance (L2), second electric capacity (C2), first switch (S1) and second switch (S2); First end of said first switch (S1) and civil power input coupling; First end coupling of second end of said first switch (S1) and said first inductance (L1); Second end of said first inductance (L1) and the coupling of the mid point of said first brachium pontis; Said first brachium pontis, second brachium pontis and the 3rd brachium pontis are connected across the positive pole and the negative pole of said bus capacitor (DC1) respectively, and the mid point of said second brachium pontis is coupled to center line (N), first end coupling of the mid point of said the 3rd brachium pontis and said second inductance (L2); First end coupling of second end of said second inductance (L2) and said second electric capacity (C2), second end of said second electric capacity (C2) is coupled to center line (N); It is characterized in that: said uninterrupted power supply also comprises battery;
First end coupling of the positive pole of said battery and said second switch (S2), first end coupling of second end of said second switch (S2) and said first inductance (L1), the negative pole coupling of the negative pole of said battery and said bus capacitor (DC1);
Or,
The positive pole coupling of the positive pole of said battery and said bus capacitor (DC1), first end coupling of the negative pole of said battery and said second switch (S2), first end coupling of second end of said second switch (S2) and said first inductance (L1).
2. uninterrupted power supply according to claim 1 is characterized in that: said subelement also comprises first electric capacity (C1), the negative pole coupling of positive pole coupling, second end and the said battery of said first electric capacity (C1) first end and said battery.
3. uninterrupted power supply according to claim 1 is characterized in that: said subelement also comprises the 3rd inductance (L3), and the mid point of said second brachium pontis is coupled to center line (N) through said the 3rd inductance (L3).
4. uninterrupted power supply according to claim 1; It is characterized in that: said subelement also comprises the 3rd switch (S3); When first end coupling of the positive pole of said battery and said second switch (S2), when first end of second end of said second switch (S2) and said first inductance (L1) is coupled
The negative pole of said battery is through the negative pole coupling of said the 3rd switch (S3) with said bus capacitor (DC1).
5. uninterrupted power supply according to claim 1; It is characterized in that: said subelement also comprises the 3rd switch (S3); When first end coupling of the negative pole of said battery and said second switch (S2), when first end of second end of said second switch (S2) and said first inductance (L1) is coupled
The positive pole of said battery is through the positive pole coupling of said the 3rd switch (S3) with said bus capacitor (DC1).
6. uninterrupted power supply according to claim 1; It is characterized in that: said first gate-controlled switch (Q1), second gate-controlled switch (Q2), the 3rd gate-controlled switch (Q3), the 4th gate-controlled switch (Q4), the 5th gate-controlled switch (Q5) and the 6th gate-controlled switch (Q6) are the gate-controlled switch of same type, and the gate-controlled switch of said same type is metal oxide semiconductor field effect tube, insulated gate bipolar transistor, power transistor, turn-off thyristor, MOS control thyristor, static induction transistor, static induction thyristor or integrated gate commutated thyristor.
7. uninterrupted power supply according to claim 1; It is characterized in that: said uninterrupted power supply comprises at least two said subelements; First end of the positive pole of said battery and the second switch of each sub-cells (S2) is coupled respectively, and the negative pole of the negative pole of said battery and the bus capacitor of each sub-cells (DC1) is coupled respectively.
8. uninterrupted power supply according to claim 1; It is characterized in that: said uninterrupted power supply comprises at least two said subelements; The positive pole of the positive pole of said battery and the bus capacitor of each sub-cells (DC1) is coupled respectively, and first end of the negative pole of said battery and the second switch of each sub-cells (S2) is coupled respectively.
9. uninterrupted power supply according to claim 1; It is characterized in that: said switching tube driver module comprises front-end filtering module and rear end driver module; First output of said front-end filtering module connects the input of said rear end driver module; The earth terminal of said front-end filtering module directly links to each other with the center line of said rear end driver module, the negative pole coupling of the center line of said rear end driver module and the bus capacitor (DC1) in the said subelement.
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| US10615637B2 (en) | 2017-12-25 | 2020-04-07 | Delta Electronics, Inc. | Uninterruptable power supply apparatus with shared electronic components |
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| CN110545029A (en) * | 2019-08-28 | 2019-12-06 | 深圳市法拉第电驱动有限公司 | Driving device of high-power electric energy converter |
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