CN208094446U - A kind of high power UPS - Google Patents
A kind of high power UPS Download PDFInfo
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- CN208094446U CN208094446U CN201820492656.3U CN201820492656U CN208094446U CN 208094446 U CN208094446 U CN 208094446U CN 201820492656 U CN201820492656 U CN 201820492656U CN 208094446 U CN208094446 U CN 208094446U
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Abstract
The utility model discloses a kind of high power UPSs, including：Rectification module, boost module, inverter module, dsp controller；The dsp controller is connect with rectification module, boost module, inverter module respectively, the input terminal of the rectification module connects alternating current, the output end of the rectification module and the input terminal of boost module connect, the output end of the boost module and the output end of inverter module connect, the output end of the inverter module connects user load, to export the required sine wave of user.The uninterruptible power supply that the utility model is created is superior to existing uninterruptible power supply in each performance indicator, in particular, working efficiency therein is up to 93%, is higher by than the 89% of existing uninterruptible power supply very much.
Description
Technical field
The utility model is related to switch power technology field, more particularly to a kind of uninterruptible power supply.
Background technology
Uninterruptible power supply (UPS) is a kind of very important emergency service equipment in outside.When input alternating current interrupts,
UPS, which can be continued for a period of time, supplies electricity to other equipment such as office computer, enables us to have the sufficient time to go to be answered
It is right；Simultaneously when alternating current is abnormal, UPS can also effectively purify alternating current.Meanwhile uninterruptible power supply is as a kind of
Power electronic equipment, the inverter circuit with maintenance-free stored energy equipment and automatic control type also have analog circuit
And digital circuit.With the development of society, UPS, in factory, company, the even every field such as family have obtained widely answering
With the importance of UPS will obtain raising increasingly.
By the statistical data of Internet data center, because causing the failure of apparatus such as computer the problem of power supply, this ratio
Example accounts for about percent 45 or so.In addition, power supply also has the various kinds problems such as voltage transient is excessively high, input powers off, voltage ripple is excessive.
Simultaneously in China, the number that big city, medium-sized city and small city or villages and small towns averagely power off be respectively 0.5 time monthly, 2 times it is every
Month and 4 times monthly.From the above it can be seen that in order to solve the problems, such as power supply instability, one UPS of configuration to external equipment, this
It is very important.In addition, for high-end communication apparatus and the high-end network equipment, these cannot all allow have power-off
It happens；The especially heart in a network, is run using server as pith, such UPS, which just seems, more to be aggravated
It has wanted.Either common computer or expensive computer, with after a period of time, the file data in computer will seem
It is very valuable, so in order to prevent unexpected disappear of file data and configuring a uninterruptible power supply is necessary.
Existing uninterruptible power supply is mostly based on two level inverse conversion systems, for this uninterruptible power supply, the harmonic wave of output
Current distortion degree is in linear R CD outputs fully loaded lower generally 7%, and UPS machine systems working efficiency only up to reach
89%, working efficiency is not high.
Utility model content
The utility model solve the technical issues of be：Existing uninterruptible power supply working efficiency is not high.
The solution that the utility model solves its technical problem is：A kind of high power UPS, including：Rectification mould
Block, boost module, inverter module, dsp controller；
The rectification module includes：First, second optical coupling isolation circuit, switching tube VT1, VT2, the first, second filtered electrical
The control terminal on road, first, second optical coupling isolation circuit is connect with the GPIO of dsp controller mouths respectively, first optocoupler
The output end of isolation circuit is connect with the control terminal of switching tube VT1, the output end and switching tube of second optical coupling isolation circuit
The control terminal of VT2 connects, and one end of described switching tube VT1, VT2 are separately connected alternating current, the other end of described switching tube VT1, VT2
Be separately connected the input terminal of boost module, first filter circuit and switching tube VT1 simultaneously connect, second filter circuit with open
It closes pipe VT2 and connects, the topological structure of first, second optical coupling isolation circuit is identical；
The boost module includes：First, second BOOST type FPC soft switch circuits, the first, second BOOST types
The input terminal of FPC soft switch circuits is separately connected the output end of rectification module, the first, second BOOST type FPC Sofe Switch electricity
The output end on road is separately connected the input terminal of inverter module, the control of the first, second BOOST types FPC soft switch circuits
End is separately connected the GPIO mouths of dsp controller, and the topological structure of the first, second BOOST types FPC soft switch circuits is identical；
The inverter module includes：Including：First, second, third, fourth switch module, clamp diode D671,
D672, inductance L671, load circuit, the first, second, third, fourth switch module concatenation, the first switch module
One output end of input terminal and boost module connects, another output end of the output end and boost module of the 4th switch module
Connection, the control terminal of first, second, third, fourth switch module is connect with the GPIO of dsp controller mouths respectively, described
The output end with first switch module, the input terminal connection of second switch module are described respectively for the cathode of clamp diode D671
The output end with third switch module, the input terminal connection of the 4th switch module are described respectively for the anode of clamp diode D672
The cathode of the anode of clamp diode D671, clamp diode D672 connects over the ground respectively, one end difference of the inductance L671
It is connected with the input terminal of the output end of second switch module, third switch module, the other end and the load electricity of the inductance L671
The one end on road connects, and the other end of the load circuit connects over the ground, and first, second, third, fourth switch module is opened up
It is identical to flutter structure.
Further, the first optical coupling isolation circuit includes：Diode D21, capacitance C21, C22, C23, resistance R21, R22,
R23, R24, R25, photoelectrical coupler U21, the positive connection+15V power supplys of triode Q21, the diode D21, two pole
One end with capacitance C21, C22, the emitter of one end of resistance R21, triode Q21 connect the cathode of pipe D21 respectively, and described three
One end with capacitance C23, the control terminal of one end of resistance R25, switching tube VT1 connect the collector of pole pipe Q21 respectively, the electricity
One end of resistance R22 is connect with+12V power supplys, the other end of resistance R22 one end with resistance R23 respectively, photoelectrical coupler
The anode of U21 connects, the cathode of the photoelectrical coupler U21 other end with resistance R23 respectively, the GPIO mouths of dsp controller
Connection, the collector of the photoelectrical coupler U21 are connect with the base stage of triode Q21, the emitter of the photoelectrical coupler U21
It is connect with one end of resistance R24, the other end of the other end of described capacitance C21, C22, C23, resistance R21, R25 connects over the ground respectively
It connects.
Further, the first BOOST type FPC soft switch circuits include：Inductance L31, L32, L33, capacitance C31, C32, C33,
C34, C35, C36, resistance R31, R32, R33, R34, diode D31, D32, D33, D34, D35, D36, D37, power tube IG31,
The output end of one end of the inductance L31 and rectification module connects, the other end of the inductance L31 respectively with diode D31,
The anode of D32, one end of inductance L32, L33, one end connection of capacitance C31, C32, the other end difference of described capacitance C31, C32
With the anode of diode D33, the cathode of diode D34 connects, the anode of the diode D34 respectively with capacitance C33, C34
One end, the cathode connection of diode D35, the cathode of the anode difference diode D36 of the diode D35, inductance L32, L33's
The other end, the source electrode connection of power tube IG31, the grid of the power tube IG31 connect with one end of resistance R31, R32, R33 respectively
It connects, the other end of the resistance R31 is connect with the anode of diode D37, and the other end of the resistance R32 is with diode D37's
Cathode connects, and the anode of the diode D37 is connect with the GPIO of dsp controller mouths, the cathode of the diode D33 respectively with
One end of capacitance C35, C36, one end of resistance R34, the cathode of diode D31, D32, the input terminal connection of inverter module, institute
State the other end of resistance R33, R34, the drain electrode of power tube IG31, the other end of capacitance C33, C34, C35, C36 respectively with neutrality
Point connection.
Further, first switch module includes：Inductance L71, L72, L73, resistance R71, capacitance C71, diode D71,
D72, D73, the control terminal and dsp controller of one end of power switch tube Q71, the inductance L71 as first switch module
The connection of GPIO mouths, the cathode with diode D71, one end connection of inductance L72 are described respectively for the other end of the inductance L71
The anode with diode D71, one end of the base stage of power switch tube Q71, resistance R71 connect the other end of inductance L72 respectively, institute
The collector of power switch tube Q71 is stated, the cathode of diode D72, the anode of diode D73, one end difference of inductance L73 is simultaneously
It connects, and contact is connected as the input terminal of first switch module and an output end of boost module, the other end of the inductance L73
Respectively with the cathode of diode D73, one end of capacitance C71 connects, the other end of the resistance R71, the hair of power switch tube Q71
The other end of emitter-base bandgap grading, the anode of diode D72, capacitance C71 connects together, and output of the contact as first switch module
End is connect with the input terminal of second switch module, output end another control as first switch module simultaneously of first switch module
The GPIO of end processed and dsp controller mouths connect.
Further, the capacitance C72 and resistance R72 that the load circuit includes and connects.
The utility model has the beneficial effects that：The uninterruptible power supply of the invention each performance indicator be superior to it is existing not
Uninterruptible power is higher by many in particular, working efficiency therein is up to 93% than the 89% of existing uninterruptible power supply.
Description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described.Obviously, described attached drawing is a part of the embodiment of the utility model, rather than complete
Portion's embodiment, those skilled in the art without creative efforts, can also be obtained according to these attached drawings it
His design scheme and attached drawing.
Fig. 1 is the connection relationship diagram between each module of uninterruptible power supply of the invention；
Fig. 2 is the connection block diagram of rectification module；
Fig. 3 is the circuit connection diagram of rectification module；
Fig. 4 is the connection block diagram of boost module；
Fig. 5 is the circuit connection diagram of boost module；
Fig. 6 is the connection block diagram of inverter module；
Fig. 7 is the circuit connection diagram of inverter module；
The pwm control signal schematic diagram that Fig. 8 power switch tubes receive；
Fig. 9 is the compares figure of sinusoidal modulation wave signal and triangle carrier signal.
Specific implementation mode
The technique effect of the design of the utility model, concrete structure and generation is carried out below with reference to embodiment and attached drawing
It clearly and completely describes, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment
It is a part of the embodiment of the utility model, rather than whole embodiments, it is based on the embodiments of the present invention, the skill of this field
The other embodiment that art personnel are obtained without creative efforts belongs to the model of the utility model protection
It encloses.In addition, all connection/connection relations being previously mentioned in text, not singly refer to component and directly connect, and referring to can be according to specific reality
Situation is applied, by adding or reducing couple auxiliary, to form more preferably coupling structure.Each technology in the invention is special
Sign, can be with combination of interactions under the premise of not conflicting conflict.
Embodiment 1, with reference to figure 1, a kind of high power UPS, including：Rectification module 1, boost module 2, inverter
Module 3, dsp controller 4；The dsp controller 4 is connect with rectification module 1, boost module 2, inverter module 3 respectively, described
The input terminal of rectification module 1 connects alternating current, and the output end of the rectification module 1 is connect with the input terminal of boost module 2, the liter
The output end of die block 2 is connect with the output end of inverter module 3, and the output end of the inverter module 3 connects user load,
To export the required sine wave of user.Wherein, the dsp controller 4 is TMS320F28335 chips.
Referring to figs. 2 and 3, the rectification module 1 includes：First, second optical coupling isolation circuit 21,22, switching tube VT1,
The control terminal of VT2, the first, second filter circuit 23,24, first, second optical coupling isolation circuit 21,22 are controlled with DSP respectively
GPIO mouths signal1, signal2 connection of device 4 processed, the output end of first optical coupling isolation circuit 21 is with switching tube VT1's
Control terminal connects, and the output end of second optical coupling isolation circuit 22 is connect with the control terminal of switching tube VT2, the switching tube
One end of VT1, VT2 are separately connected alternating current, the other end of described switching tube VT1, VT2 be separately connected the input terminal of boost module 2+
IN ,-IN, first filter circuit 23 and switching tube VT1 simultaneously connect, and second filter circuit 24 and switching tube VT2 simultaneously connects, institute
The topological structure for stating the first, second optical coupling isolation circuit 21,22 is identical, and first optical coupling isolation circuit 21 includes：Diode
D21, capacitance C21, C22, C23, resistance R21, R22, R23, R24, R25, photoelectrical coupler U21, triode Q21, two pole
Positive connection+15V the power supplys of pipe D21, the cathode of diode D21 one end with capacitance C21, C22 respectively, resistance R21's
One end, the emitter connection of triode Q21, the collector of triode Q21 one end with capacitance C23 respectively, resistance R25's
One end, the control terminal connection of switching tube VT1, one end of the resistance R22 are connect with+12V power supplys, and the resistance R22's is another
End one end with resistance R23 respectively, the anode connection of photoelectrical coupler U21, the cathode of the photoelectrical coupler U21 respectively with electricity
Hinder the other end of R23, the GPIO mouth signal1 connections of dsp controller 4, the collector and triode of the photoelectrical coupler U21
The base stage of Q21 connects, and the emitter of the photoelectrical coupler U21 is connect with one end of resistance R24, the capacitance C21, C22,
The other end of the other end of C23, resistance R21, R25 connects over the ground respectively.The topology of first, second filter circuit 23,24
Structure is identical, and first filter circuit 23 includes：The resistance R26 and capacitance C24 of concatenation.Described switching tube VT1, VT2 are
Thyristor.
When rectification module 1 works, the GPIO mouths signal1 of the cathode reception dsp controller 4 of photoelectrical coupler U21 is sent out
Control signal, when it is low level to control signal, the primary side diode of photoelectrical coupler U21 is switched on, photoelectrical coupler U21
The gate potentials of the triode ON on secondary side, triode Q21 are switched on because dragging down, the voltage output of ﹢ 15V power supplys to switching tube
The gate pole of VT1, switching tube VT1 are switched on when alternating current is positive half cycle；Positive half cycle waveform is exported, which passes through first
The filtering of filter circuit 23 is formed in the input terminal+IN of DC supply input boost module 2.Rectification filter for the negative half period of alternating current
Wave, then by the second optical coupling isolation circuit 22, switching tube VT2, the second filter circuit is completed, operation principle and positive half cycle it is whole
Stream filtering is identical, is just not described in detail here.
With reference to figure 4, Fig. 5, in rectification module 1 transformed DC supply input to the input terminal of boost module 2, the boosting
Module 2 includes：First, second BOOST type FPC soft switch circuits 41,42, the first, second BOOST type FPC Sofe Switch electricity
The input terminal on road 41,42 is separately connected output end+the IN ,-IN of rectification module 1, the first, second BOOST types FPC Sofe Switch
The output end of circuit 41,42 is separately connected input terminal+the BUS ,-BUS of inverter module 3, the first, second BOOST types FPC
The control terminal of soft switch circuit 41,42 is separately connected GPIO mouths PWM1, PWM2 of dsp controller 4, first, second BOOST
The topological structure of type FPC soft switch circuits 41,42 is identical, and the first BOOST type FPC soft switch circuits 41 include：Inductance
L31, L32, L33, capacitance C31, C32, C33, C34, C35, C36, resistance R31, R32, R33, R34, diode D31, D32,
D33, D34, D35, D36, D37, power tube IG31, one end of the inductance L31 are connect with the output end+IN of rectification module 1, institute
State the other end of the inductance L31 anode with diode D31, D32 respectively, one end of inductance L32, L33, the one of capacitance C31, C32
End connection, the anode with diode D33, the cathode connection of diode D34 are described respectively for the other end of described capacitance C31, C32
One end with capacitance C33, C34, the cathode of diode D35 connect the anode of diode D34 respectively, and the diode D35 is just
Distinguish the cathode of diode D36, the other end of inductance L32, L33, the source electrode connection of power tube IG31, the power tube IG31 in pole
Grid connect respectively with one end of resistance R31, R32, R33, the anode of the other end of the resistance R31 and diode D37 are even
It connects, the other end of the resistance R32 is connect with the cathode of diode D37, anode and the dsp controller 4 of the diode D37
GPIO mouthfuls of PWM1 connections, the cathode of diode D33 one end with capacitance C35, C36 respectively, one end of resistance R34, two poles
The cathode of pipe D31, D32, the input terminal+BUS connections of inverter module 3, the other end of described resistance R33, R34, power tube
The other end of the drain electrode of IG31, capacitance C33, C34, C35, C36 is connect with neutral point n respectively.The capacitance of the capacitance C35 is
The capacitance of 1000uF, the capacitance C36 are 10uF.By the combination of small one and large one two kinds of capacitances, the output of boost module 2 can be reduced
Harmonic wave.
Since the operation principle of the first, second BOOST type FPC soft switch circuits 41,42 is identical, below with the first BOOST
The operation principle of type FPC soft switch circuits 41 is described.
The inductance L31, diode D31, D32, power tube IG31, capacitance C35, C36, resistance R34 are formed typically
BOOST type boost configurations, PWM1 mouthfuls of generation PWM waves of GPIO mouths of the dsp controller 4, the PWM wave are applied to power tube IG31
On, when power tube IG31 is switched on, the output end+IN of rectification module 1 charges to inductance L31, is flowed through in charging process
The electric current of inductance L31 is generally stablized in definite value；Simultaneously with this, capacitance C35, C36 supplies electricity to resistance R34, forms output voltage, defeated
Go out the input terminal+BUS that voltage is transported to inverter module 3, completes boost process.
It is the PFC Sofe Switch processes of the first BOOST type FPC soft switch circuits 41 below：
(1) when IG31 is connected, due to the presence of L32 and L333, IG31 no-voltages are open-minded.In inductance L32 and inductance L33
Increase in current, in two sub-sections：
First part：The shunting of inductance L32 and inductance L33, in inductance L32 and inductance L33 conductings, diode D31 and
Voltage on the left of diode D32 is very high.Inductance L32 and inductance L33 excitations at this time, electric current rise.
Second part：Since capacitance C31 and capacitance C32 both end voltages are close to 0, as capacitance C31 and the left sides capacitance C32 voltage
When reduction, capacitance C33 and capacitance C34 are put by diode D34, capacitance C31 and capacitance C32, inductance L32 and inductance L33
Electricity, energy transfer in capacitance C33 and inductance C34 to capacitance C31, C32, in inductance L32, L33.
In this process, capacitance C31, C32 charges, inductance L32, L33 accumulation of energy, when inductance L32, L33 electric current reaches stream
When value through inductance L31, the electric current of diode D31, D32 drop to 0, realize soft switching.
(2) when IGBT1 is turned off, the energy of inductance L32, L33 charges to capacitance C33, C34, inductance L31 to capacitance C31,
C32 discharges.The energy of capacitance C31, C32 are squeezed into the input terminal+BUS of inverter module 3.When the voltage of capacitance C31, C32 connect
When nearly 0, diode D31, D32 conducting.The energy of capacitance C33, C34 when next power tube IG31 is connected, go to capacitance C31,
C32 and inductance L32, L33.PFC is completed by above-mentioned simple PFC Sofe Switch.
With reference to figure 6 and Fig. 7, the inverter module 3 includes：First, second, third, fourth switch module 61,62,64,
65, clamp diode D671, D672, inductance L671, load circuit 66, first, second, third, fourth switch module 61,
62,64,65 concatenation, the input terminal of the first switch module 61 are connect with an output end+BUS of boost module 2, and the described 4th
The output end of switch module 65 is connect with another output end-BUS of boost module 2, first, second, third, fourth switch
The control terminal of module 61,62,64,65 respectively with the GPIO of dsp controller 4 mouths P1.0, P1.1, P1.2, P1.3, P1.4, P1.5,
P1.6, P1.7 are connected, and GPIO mouths P1.0, P1.1, P1.2, P1.3, P1.4, P1.5, P1.6, P1.7 of dsp controller 4 are generated
PWM wave is to control the first, second, third, fourth switch module 61,62,64,65, the cathode point of the clamp diode D671
Not with the output end of first switch module 61, the input terminal connection of second switch module 62, the clamp diode D672 is just
The output end with third switch module 64, the input terminal of the 4th switch module 65 connect respectively for pole, the clamp diode D671
Anode, the cathode of clamp diode D672 connects over the ground respectively, one end of the inductance L671 respectively with second switch module
62 output end, the input terminal connection of third switch module 64, one end of the other end and load circuit 66 of the inductance L671
Connection, the other end of the load circuit 66 connects over the ground, first, second, third, fourth switch module 61,62,64,
65 topological structure is identical, and the first switch module 61 includes：Inductance L71, L72, L73, resistance R71, capacitance C71, two poles
Pipe D71, D72, D73, one end of power switch tube Q71, the inductance L71 as first switch module 61 a control terminal with
The GPIO mouth P1.0 connections of dsp controller 4, the other end of the inductance L71 cathode with diode D71 respectively, inductance L72's
One end connects, the other end of the inductance L72 anode with diode D71 respectively, the base stage of power switch tube Q71, resistance R71
One end connection, the collector of the power switch tube Q71, the cathode of diode D72, the anode of diode D73, inductance L73
One end respectively and connect, and contact is connect as the input terminal of first switch module 61 with an output end+BUS of boost module 2,
The cathode with diode D73, one end of capacitance C71 connect the other end of the inductance L73 respectively, and the resistance R71's is another
End, the other end of the emitter of power switch tube Q71, the anode of diode D72, capacitance C71 connect together, and contact is made
It is connect with the input terminal of second switch module 62 for the output end of first switch module 61, the output end of first switch module 61 is same
Another control terminal of Shi Zuowei first switches module 61 is connect with the GPIO of dsp controller 4 mouths P1.1.As an optimization, described negative
Carry capacitance C72 and resistance R72 that circuit 66 includes and connects.One end of the capacitance C72, one end of resistance R72 respectively with inductance
The other end of L671 connects, and the other end of the capacitance C72, the other end of resistance R72 is connected to ground respectively.
First, second, third, fourth switch module 61,62,64,65, clamp diode D671, D672, inductance
L671, load circuit 66 constitute tri-level inversion structure.
Boost module 2 output end+BUS ,-BUS input voltage magnitude be 1/2Vin, power switch tube Q71, Q72,
The filter inductance of Q73, Q74, clamp diode D671, D672, output are inductance L671, and filter capacitor is capacitance C72, corresponding stream
Electric current through them is respectively ILAnd IC, the electric current of load is ILOAD；The voltage difference at the both ends inductance L671 is Uo；The both ends capacitance C72
Voltage difference be Ua.
The mathematical model that can obtain three-level inverter is：
The schematic diagram for the pwm control signal that four power switch tubes Q71, Q72, Q73, Q74 are received is as shown in Figure 8：
In output voltage positive half cycle：Power switch tube Q72 is often connected, and power switch tube Q74 is normally-off, power switch tube
Q71 and Q73 complementations are connected；
In output voltage negative half period：Power switch tube Q73 is often connected, and power switch tube Q71 is normally-off, power switch tube
Q72 and Q74 complementations are connected.
With reference to figure 9, the pwm control signals of four power switch tubes is all by the sinusoidal modulation wave of standard and one three
Angle carrier wave generates after comparing, and by taking output voltage positive half period as an example, appoints and one of carrier cycle signal is taken to be analyzed.
In output voltage positive half period：Power switch tube Q72 is often switched on, and power switch tube Q74 is often turned off, and power is opened
Pipe Q71 and power switch tube Q73 is closed to be switched in turn.Duty ratio when power switch tube Q71 work is let d be, Ts is triangular wave
The work period of carrier wave.In Ts, Vm is the average value of sine wave modulation wave.For sine wave modulation wave and triangular wave carrier,
When the former average value is more than the average value of the latter, dsp controller 4 just sends out high-level control signal to power switch tube Q71
Control it to be switched on；On the contrary, when the former average value is less than the average value of the latter, dsp controller 4 sends out low level control
Signal is carried out controlling it and is turned off to power switch tube Q71.Following mathematic(al) representation is obtained by the property of similar triangles：
I.e.：
By shown in formula (2.9), voltage Vt and cycle T s are always stationary value, and the average value Vm of sine wave modulation wave is with work(
The conducting dutycycle D of rate switching tube Q71 changes and changes, if D becomes smaller, also with becoming smaller, inverter circuit output voltage also becomes Vm
It is small；On the contrary, if D becomes larger, also with becoming larger, inverter circuit output voltage also becomes larger Vm.So being sent not by dsp controller 4
Same control signal controls its conducting dutycycle D to power switch tube Q71, finally can be obtained by the sine wave that we want
Voltage.
Now analyze the groundwork process of the tri-level inversion structure：
(1) when the voltage of the output end+BUS from boost module 2 is in positive half cycle, voltage Ua>0, power switch
Pipe Q71 is often switched on, and power switch tube Q74 is often turned off：
1. as the electric current I for flowing through inductance L671L>When 0, power switch tube Q71 conductings, power switch tube Q73 is turned off, then electric
Feel the electric current I of L671LIt successively flows through, power switch tube Q71, Q72, inductance L671, capacitance C72；
Circuit equation is at this time：
Due to and inductance L671 be steady state value, therefore electric current ILIt can become larger, if power switch tube Q71's opens
The pass period is Ts, operative duty cycles D, then the time switched on of power switch tube Q71 is dt=Ts*D, then in service time
It is interior, electric current ILRising value be：
Power switch tube Q71 shutdowns, power switch tube Q73 conductings；
Circuit equation is at this time：
By shown in formula (2.12), because of Ua>0, therefore ILIt can become smaller.If power switch tube Q73 takes turns with power switch tube Q71
Stream is switched on, and the conducting dutycycle of power switch tube Q71 is D, then the conducting dutycycle of power switch tube Q73 is 1-D, and power is opened
Turn-on time dt=(1-D) the * Ts for closing pipe Q73, in power switch tube Q73 turn-on times, electric current ILDrop-out value is：
2. as electric current IL<When 0, power switch tube Q71 conductings, power switch tube Q73 shutdowns；
Circuit equation is at this time：
Due toAnd inductance L671 is steady state value, therefore ILIt can become smaller.If the switch work of power switch tube Q71
It is Ts as the period, operative duty cycles are D, then the time switched on power switch tube Q71 is dt=D*Ts, then in power switch
In pipe Q71 service times, electric current ILDrop-out value be：
Power switch tube Q71 shutdowns, power switch tube Q73 conductings；
Circuit equation is at this time：
Because of Ua>0, therefore ILIt can become smaller, power switch tube Q73 is switched in turn with power switch tube Q71, power switch
The conducting dutycycle of pipe Q71 is D, then the conducting dutycycle of power switch tube Q73 is 1-D, the turn-on time of power switch tube Q73
Dt=(1-D) * Ts, in power switch tube Q73 turn-on times, electric current ILDrop-out value is：
(2) as output voltage negative half period, voltage Ua<0, power switch tube Q73 is often switched on, and power switch tube Q71 is normal
It is turned off：
1. as electric current IL>When 0, power switch tube Q74 conductings, power switch tube Q72 shutdowns；
Circuit equation is at this time：
Due toAnd inductance L671 is steady state value, ILIt can become smaller, if the switch work of power switch tube Q72
It is Ts as the period, operative duty cycles are that D, power switch tube Q72 and power switch tube Q74 are switched in turn, then power switch tube
Time switched on Q74 is dt=(1-D) * Ts, then within power switch tube Q74 service times, electric current ILDrop-out value be：
Power switch tube Q74 shutdowns, power switch tube Q72 conductings；
Circuit equation is at this time：
Because of Ua<0, therefore ILIt can become smaller, let d be the operative duty cycles of power switch tube Q72, power switch tube Q72's
Turn-on time dt=D*Ts, in power switch tube Q72 turn-on times, electric current ILRising value is：
2. as electric current IL<When 0, power switch tube Q74 conductings, power switch tube Q72 shutdowns；
Circuit equation is at this time：
Due toAnd inductance L671 is steady state value, ILIt can become smaller, if Ts is power switch tube Q72 switch works
Make the period, D is power switch tube Q72 operative duty cycles, and power switch tube Q72 is switched in turn with power switch tube Q74, then work(
The rate switching tube Q74 times switched on are dt=(1-D) * Ts, then within power switch tube Q74 service times, electric current ILDecline
Value is：
Power switch tube Q74 shutdowns, power switch tube Q72 conductings；
Circuit equation is at this time：
Because of Ua<0, therefore electric current ILIt can become smaller, let d be the operative duty cycles of power switch tube Q72, then power switch tube
The turn-on time dt=D*Ts of Q72, in power switch tube Q72 turn-on times, electric current ILDrop-out value is：
Above-mentioned is the entire three-level inverter course of work, includes (Ua>0,IL>0)、(Ua>0,IL<0)、(Ua<0,IL>
0)、(Ua<0,IL<0) these four inversion situations.
Test of reaching the standard grade is carried out to the uninterruptible power supply of the invention, obtains the pass of its output performance index and test result
It is table, as shown in table 1 below.
Table 1
As known from Table 1, each performance indicator of the invention is superior to existing uninterruptible power supply, in particular, work therein
Efficiency is up to 93%, is higher by than the 89% of existing uninterruptible power supply very much.
The better embodiment of the utility model is illustrated above, but the invention be not limited to it is described
Embodiment, those skilled in the art can also make various equivalent changes without departing from the spirit of the present invention
Type or replacement, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (5)
1. a kind of high power UPS, including：Rectification module, boost module, inverter module, dsp controller；Its feature
It is：
The rectification module includes：First, second optical coupling isolation circuit, switching tube VT1, VT2, the first, second filter circuit, institute
The control terminal for stating the first, second optical coupling isolation circuit is connect with the GPIO of dsp controller mouths respectively, the first light-coupled isolation electricity
The output end on road is connect with the control terminal of switching tube VT1, the control of the output end and switching tube VT2 of second optical coupling isolation circuit
End connection processed, one end of described switching tube VT1, VT2 are separately connected alternating current, and the other end of described switching tube VT1, VT2 connect respectively
Connect the input terminal of boost module, first filter circuit and switching tube VT1 simultaneously connect, second filter circuit and switching tube
VT2 simultaneously connects, and the topological structure of first, second optical coupling isolation circuit is identical；
The boost module includes：First, second BOOST type FPC soft switch circuits, the first, second BOOST types FPC are soft
The input terminal of switching circuit is separately connected the output end of rectification module, the first, second BOOST types FPC soft switch circuits
Output end is separately connected the input terminal of inverter module, the control terminal point of the first, second BOOST types FPC soft switch circuits
Not Lian Jie dsp controller GPIO mouths, the topological structure of the first, second BOOST types FPC soft switch circuits is identical；
The inverter module includes：Including：First, second, third, fourth switch module, clamp diode D671, D672,
Inductance L671, load circuit, the input terminal of the first switch module and an output end of boost module connect, and the described 4th opens
Another output end of the output end and boost module that close module connects, the control of first, second, third, fourth switch module
End processed is connect with the GPIO of dsp controller mouths respectively, the cathode of the clamp diode D671 respectively with first switch module
Output end, second switch module input terminal connection, the clamp diode D672 anode respectively with third switch module
Output end, the input terminal connection of the 4th switch module, the anode of the clamp diode D671, the cathode of clamp diode D672
It connects over the ground respectively, one end of inductance L671 output end with second switch module respectively, the input of third switch module
End connection, the other end of the inductance L671 and one end of load circuit connect, and the other end of the load circuit connects over the ground,
The topological structure of first, second, third, fourth switch module is identical.
2. a kind of high power UPS according to claim 1, it is characterised in that：First optical coupling isolation circuit packet
It includes：Diode D21, capacitance C21, C22, C23, resistance R21, R22, R23, R24, R25, photoelectrical coupler U21, triode Q21,
Positive connection+15V the power supplys of the diode D21, the cathode of diode D21 one end with capacitance C21, C22 respectively, electricity
Hinder one end of R21, the emitter connection of triode Q21, the collector of triode Q21 one end with capacitance C23 respectively, electricity
One end of R25, the control terminal connection of switching tube VT1 are hindered, one end of the resistance R22 is connect with+12V power supplys, the resistance R22
Other end one end with resistance R23 respectively, the anode connection of photoelectrical coupler U21, the cathode point of the photoelectrical coupler U21
Not with the other end of resistance R23, the GPIO mouths of dsp controller connect, the collector and triode of the photoelectrical coupler U21
The base stage of Q21 connects, and the emitter of the photoelectrical coupler U21 is connect with one end of resistance R24, the capacitance C21, C22,
The other end of the other end of C23, resistance R21, R25 connects over the ground respectively.
3. a kind of high power UPS according to claim 2, which is characterized in that the first BOOST type FPC Sofe Switch
Circuit includes：Inductance L31, L32, L33, capacitance C31, C32, C33, C34, C35, C36, resistance R31, R32, R33, R34, two poles
Pipe D31, D32, D33, D34, D35, D36, D37, power tube IG31, the output end of one end and rectification module of the inductance L31
Connection, the other end of the inductance L31 anode with diode D31, D32 respectively, one end of inductance L32, L33, capacitance C31,
One end of C32 connects, and the anode with diode D33, the cathode of diode D34 connect the other end of described capacitance C31, C32 respectively
It connects, one end with capacitance C33, C34, the cathode of diode D35 connect the anode of the diode D34 respectively, the diode
The cathode with diode D36, the other end of inductance L32, L33, the source electrode connection of power tube IG31 are described respectively for the anode of D35
The grid of power tube IG31 is connect with one end of resistance R31, R32, R33 respectively, the other end and diode of the resistance R31
The anode connection of D37, the other end of the resistance R32 connect with the cathode of diode D37, the diode D37 positive and
The GPIO mouths of dsp controller connect, the cathode of diode D33 one end with capacitance C35, C36 respectively, and the one of resistance R34
End, the cathode of diode D31, D32, the input terminal connection of inverter module, the other end of described resistance R33, R34, power tube
The other end of the drain electrode of IG31, capacitance C33, C34, C35, C36 is connect with neutral point respectively.
4. a kind of high power UPS according to claim 3, which is characterized in that first switch module includes：Electricity
Feel L71, L72, L73, resistance R71, capacitance C71, diode D71, D72, D73, power switch tube Q71, the one of the inductance L71
End as a control terminal of first switch module and the GPIO mouths connection of dsp controller, the other end of the inductance L71 respectively with
The cathode of diode D71, one end connection of inductance L72, the other end of the inductance L72 anode with diode D71 respectively, work(
The base stage of rate switching tube Q71, one end connection of resistance R71, the collector of the power switch tube Q71, diode D72's is negative
Pole, the anode of diode D73, one end of inductance L73 respectively and connect, and input terminal and boosting of the contact as first switch module
One output end of module connects, and the cathode with diode D73, one end of capacitance C71 connect the other end of the inductance L73 respectively
It connects, the other end of the resistance R71, the emitter of power switch tube Q71, the anode of diode D72, the other end of capacitance C71
It connects together, and contact is connect as the output end of first switch module with the input terminal of second switch module, first opens
The output end for closing module is connected as the GPIO mouths of another control terminal of first switch module and dsp controller simultaneously.
5. a kind of high power UPS according to claim 4, which is characterized in that the load circuit includes and connects
Capacitance C72 and resistance R72.
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| CN201820492656.3U CN208094446U (en) | 2018-04-08 | 2018-04-08 | A kind of high power UPS |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110365223A (en) * | 2018-04-08 | 2019-10-22 | 佛山科学技术学院 | A kind of 3-phase high power ups based on tri-level inversion technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110365223A (en) * | 2018-04-08 | 2019-10-22 | 佛山科学技术学院 | A kind of 3-phase high power ups based on tri-level inversion technology |
| CN110365223B (en) * | 2018-04-08 | 2024-02-13 | 佛山科学技术学院 | Three-phase high-power uninterrupted power supply based on three-level inversion technology |
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