CN208094462U - A kind of inverter module - Google Patents
A kind of inverter module Download PDFInfo
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- CN208094462U CN208094462U CN201820492659.7U CN201820492659U CN208094462U CN 208094462 U CN208094462 U CN 208094462U CN 201820492659 U CN201820492659 U CN 201820492659U CN 208094462 U CN208094462 U CN 208094462U
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- power switch
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Abstract
The utility model discloses a kind of inverter modules, including：The topological structure of first, second, third, fourth switch module, clamp diode D671, D672, inductance L671, load circuit, first, second, third, fourth switch module is identical, and the first switch module includes：Inductance L71, L72, L73, resistance R71, capacitance C71, diode D71, D72, D73, power switch tube Q71.The inverter module that the utility model is created completes complicated reversals by the first, second, third, fourth switch module simple in structure, which can be used in UPS making, can greatly lower UPS complexities, reduce UPS costs of manufacture.
Description
Technical field
The utility model is related to switch power technology field, more particularly to a kind of inverter module.
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 UPS mostly uses greatly dsp controller and is used as control chip, to control other function modules, wherein
An important function module of the inverter module as UPS, input terminal connect the output end of boost module, and output end connects
User load end is connect, control terminal connects dsp controller.
The inverter module circuit structure of existing UPS is complicated, and cost of manufacture is high.
Utility model content
The utility model solve the technical issues of be：The inverter module circuit structure of existing UPS is complicated, cost of manufacture
It is high.
The solution that the utility model solves its technical problem is：A kind of inverter module, including：The first, second,
Three, the 4th switch module, clamp diode D671, D672, inductance L671, load circuit, the input terminal of first switch module with
One output end of boost module connects, and the output end of the 4th switch module and another output end of boost module connect, the
One, second, third, the control terminal of the 4th switch module connect respectively with the GPIO of dsp controller mouths, the clamp diode
The output end with first switch module, the input terminal of second switch module connect the cathode of D671 respectively, the clamp diode
The output end with third switch module, the input terminal of the 4th switch module connect the anode of D672 respectively, the clamp diode
The cathode of the anode of D671, clamp diode D672 connects over the ground respectively, one end of the inductance L671 respectively with second switch
The output end of module, the input terminal connection of third switch module, the other end of the inductance L671 and one end of load circuit connect
It connecing, the other end of the load circuit connects over the ground, and the topological structure of the first, second, third, fourth switch module is identical, the
One switch module includes：Inductance L71, L72, L73, resistance R71, capacitance C71, diode D71, D72, D73, power switch tube
One end of Q71, the inductance L71 are connected as a control terminal of first switch module and the GPIO mouths of dsp controller, the electricity
The other end of sense L71 respectively distinguish by the cathode with diode D71, one end connection of inductance L72, the other end of the inductance L72
With the anode of diode D71, the base stage of power switch tube Q71, one end connection of resistance R71, the collection of the power switch tube Q71
Electrode, the cathode of diode D72, the anode of diode D73, one end of inductance L73 respectively and connect, and contact is as first switch
The input terminal of module and an output end of boost module connect, and the other end of the inductance L73 is negative with diode D73 respectively
Pole, one end connection of capacitance C71, the other end of the resistance R71, the emitter of power switch tube Q71, diode D72 is just
The other end of pole, capacitance C71 connects together, and output end and second switch module of the contact as first switch module
Input terminal connects, and the output end of first switch module is simultaneously as another control terminal of first switch module and dsp controller
GPIO mouthfuls of connections.
Further, the FGY75N60SMD of the fairchild companies of the model U.S. of the power switch tube Q71.
Further, the model of described clamp diode D671, D672 are the 10uFAPT60D60BG of Meigo Sammy Co., Ltd.
Further, the PE-51512 of model Pusi Electronic Co., Ltd., Dongguan of the inductance L671.
Further, the capacitance C72 and resistance R72 that the load circuit includes and connects.
The utility model has the beneficial effects that：The inverter module of the invention by simple in structure first, second,
Third, the 4th switch module complete complicated reversals, which can be used in UPS making, can greatly lower
UPS complexities reduce UPS costs of manufacture.
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 block diagram of inverter module；
Fig. 2 is the circuit connection diagram of inverter module；
Fig. 3 is the pwm control signal schematic diagram that power switch tube receives；
Fig. 4 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 and Fig. 2, a kind of inverter module, including：First, second, third, fourth switch module
61,62,64,65, clamp diode D671, D672, inductance L671, load circuit 66, described first, second, third, fourth opens
It closes module 61,62,64,65 to concatenate, an output end+BUS connections of the input terminal and boost module of the first switch module 61,
Another output end-BUS connections of the output end and boost module of 4th switch module 65, described first, second, third,
The control terminal of 4th switch module 61,62,64,65 respectively with the GPIO of dsp controller mouths P1.0, P1.1, P1.2, P1.3,
P1.4, P1.5, P1.6, P1.7 are connected, GPIO mouths P1.0, P1.1 of dsp controller, P1.2, P1.3, P1.4, P1.5, P1.6,
P1.7 generates PWM wave to control the first, second, third, fourth switch module 61,62,64,65, the clamp diode D671
The cathode output end with first switch module 61 respectively, the input terminal connection of second switch module 62, the clamp diode
The output end with third switch module 64, the input terminal of the 4th switch module 65 connect the anode of D672 respectively, the clamper two
The cathode of the anode of pole pipe D671, clamp diode D672 connects over the ground respectively, and one end of the inductance L671 is respectively with second
The output end of switch module 62, the input terminal connection of third switch module 64, the other end and load circuit of the inductance L671
66 one end connection, the other end of the load circuit 66 connect 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, diode D71, D72, D73, the control of one end of power switch tube Q71, the inductance L71 as first switch module 61
The GPIO of end processed and dsp controller mouth P1.0 connections, the other end of the inductance L71 cathode with diode D71 respectively, inductance
One end of L72 connects, and the anode with diode D71, the base stage of power switch tube Q71 are electric respectively for the other end of the inductance L72
Hinder one end connection of R71, the collector of the power switch tube Q71, the cathode of diode D72, the anode of diode D73, electricity
Feel one end of L73 respectively and connect, and contact is as the input terminal of first switch module 61 and an output end+BUS of boost module
Connection, the cathode with diode D73, one end of capacitance C71 connect the other end of the inductance L73 respectively, the resistance R71's
The other end of the other end, the emitter of power switch tube Q71, the anode of diode D72, capacitance C71 connects together, and connects
Point is connect as the output end of first switch module 61 with the input terminal of second switch module 62, the output of first switch module 61
It holds while as the GPIO mouth P1.1 connections of another control terminal of first switch module 61 and dsp controller.As an optimization, described
The capacitance C72 and resistance R72 that load circuit 66 includes and connects.One end of the capacitance C72, one end of resistance R72 respectively with electricity
Feel the other end connection of L671, 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 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 3：
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.
The pwm control signal of four power switch tubes is all by the sinusoidal modulation wave and a triangular carrier phase of a standard
After generate, by taking output voltage positive half period as an example, appoint take one of carrier cycle signal to be analyzed.
With reference to figure 4, in output voltage positive half period：Power switch tube Q72 is often switched on, and power switch tube Q74 is often closed
Disconnected, power switch tube Q71 and power switch tube Q73 are switched in turn.Let d be duty ratio when power switch tube Q71 work, Ts
It is the work period of triangular wave carrier.In Ts, Vm is the average value of sine wave modulation wave.For sine wave modulation wave and triangle
Wave carrier signal, when the former average value is more than the average value of the latter, dsp controller just sends out high-level control signal to power switch
Pipe Q71 control it and is switched on；On the contrary, when the former average value is less than the average value of the latter, dsp controller 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 by dsp controller different
Control signal control its conducting dutycycle D to power switch tube Q71, finally can be obtained by the sine wave electricity that we want
Pressure.
Now analyze the groundwork process of the tri-level inversion structure：
(1) when the voltage of the output end+BUS from boost module is in positive half cycle, voltage Ua>0, power switch tube
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 toAnd inductance L671 is steady state value, therefore electric current ILIt can become larger, if power switch tube Q71
Switch periods are Ts, operative duty cycles D, then the time switched on of power switch tube Q71 is dt=Ts*D, then when opening
In, 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 of power switch tube Q71
Work period is Ts, and operative duty cycles are D, then the time switched on power switch tube Q71 is dt=D*Ts, is then opened in power
It closes 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, if 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.
The inverter module of the invention by simple in structure first, second, third, fourth light modules 61,62,
64,65, reversals are completed, which can be used in UPS making, can greatly lower UPS complexities, reduce UPS
Cost of manufacture.
As advanced optimizing for the above embodiment, the model U.S. fairchild of the power switch tube Q71 is public
The FGY75N60SMD of department.
As advanced optimizing for the above embodiment, the model of described clamp diode D671, D672 are Mei Gaosen
The 10uFAPT60D60BG of company of U.S..
As advanced optimizing for the above embodiment, model Pusi Electronic Co., Ltd., Dongguan of the inductance L671
PE-51512.
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 inverter module, which is characterized in that including：First, second, third, fourth switch module, clamp diode
D671, D672, inductance L671, load circuit, the input terminal of first switch module and an output end of boost module connect, and the 4th
The output end of switch module and another output end of boost module connect, the control of the first, second, third, fourth switch module
End is connect with the GPIO of dsp controller mouths respectively, and the cathode of the clamp diode D671 is defeated with first switch module respectively
Outlet, the input terminal connection of second switch module, the anode of the clamp diode D672 are defeated with third switch module respectively
Outlet, the input terminal connection of the 4th switch module, the anode of the clamp diode D671, the cathode point of clamp diode D672
It does not connect over the ground, one end of inductance L671 output end with second switch module respectively, the input terminal of third switch module
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
One, second, third, the topological structure of the 4th switch module it is identical, first switch module includes：Inductance L71, L72, L73, resistance
R71, capacitance C71, diode D71, D72, D73, power switch tube Q71, one end of the inductance L71 is as first switch module
A control terminal and the GPIO mouths of dsp controller connect, the other end of the inductance L71 cathode with diode D71 respectively, electricity
Feel one end connection of L72, the other end of the inductance L72 anode with diode D71 respectively, the base stage of power switch tube Q71,
One end of resistance R71 connects, the collector of the power switch tube Q71, the cathode of diode D72, the anode of diode D73,
One end of inductance L73 respectively and connects, and contact is connected as the input terminal of first switch module and an output end of boost module,
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 for the output end of first switch module, the output end conduct simultaneously of first switch module
Another control terminal of first switch module and the GPIO mouths of dsp controller connect.
2. a kind of inverter module according to claim 1, it is characterised in that：The model of the power switch tube Q71
The FGY75N60SMD of fairchild companies of the U.S..
3. a kind of inverter module according to claim 1 or 2, it is characterised in that：Described clamp diode D671, D672
Model be Meigo Sammy Co., Ltd 10uFAPT60D60BG.
4. a kind of inverter module according to claim 3, it is characterised in that：The model Dongguan of the inductance L671 is general
Think the PE-51512 of Electronics Co., Ltd..
5. a kind of inverter module according to claim 4, it is characterised in that：The capacitance that the load circuit includes and connects
C72 and resistance R72.
Priority Applications (1)
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| CN201820492659.7U CN208094462U (en) | 2018-04-08 | 2018-04-08 | A kind of inverter module |
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| CN201820492659.7U CN208094462U (en) | 2018-04-08 | 2018-04-08 | A kind of inverter module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350812A (en) * | 2018-04-08 | 2019-10-18 | 佛山科学技术学院 | A kind of inverter module for UPS |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350812A (en) * | 2018-04-08 | 2019-10-18 | 佛山科学技术学院 | A kind of inverter module for UPS |
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Granted publication date: 20181113 |