CN209250520U - A kind of novel two-way DC-AC conversion equipment and inversion system, commutation system - Google Patents
A kind of novel two-way DC-AC conversion equipment and inversion system, commutation system Download PDFInfo
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Abstract
A kind of novel two-way DC-AC conversion equipment and inversion system, commutation system, the two-way DC-AC conversion equipment includes reversing unit, switch unit, filter unit and control unit.Single-phase full bridge controlable electric current is combined with buck-boost circuit in the technical solution of the application, copped wave is carried out by buck-boost circuit in reversals, form SPWM waveform, so that direct current is converted to single-phase alternating current by single-phase full bridge controlable electric current, it can effectively reduce the loss of field-effect tube during this, improve the utilization rate of filter inductance, while reducing the EMI of device；Buck-boost circuit is matched with filter inductance in switching process, when single-phase full bridge controlable electric current does power frequency switching, conducive to buck-boost circuit as PFC and control output voltage, the EMI interference for additionally aiding and reducing the loss of field-effect tube, reduce device, so as to improve DC side output characteristics.
Description
Technical field
The present invention relates to circuit structures, and in particular to a kind of novel two-way DC-AC conversion equipment and inversion system, rectification
System.
Background technique
Inverter circuit is usually used in constituting various AC power sources, is used widely in the industry.Currently, inverter circuit is adopted more
With full-bridge or the circuit structure of semibridge system, it is mainly used to realize direct current to the conversion process exchanged.Such bridge inverter main circuit
Switch state usually determined by the voltage signal for being added on its control electrode, the defeated of output end is determined by the conversion frequency of voltage signal
Frequency out, to achieve the purpose that inversion.It is open-minded due to field-effect tube when using bipolar modulation in reversals
Turn-off characteristic is inconsistent, it may appear that the phenomenon that straight-through field-effect tube is damaged, and when using unipolarity modulation, continuous current circuit increases
Add, EMI (Electromagnetic Interference, electromagnetic interference) interference is larger.
Rectification circuit is corresponding with inverter circuit, alternating current is become the process of direct current.Rectification circuit is often by two poles
Pipe as rectifier cell, according to the rectifier systems such as halfwave rectifier, full-wave rectification, bridge rectifier, anomalous rectification and payload size into
The selection of row model.Specifically, rectification circuit is to be become the alternating voltage of positive and negative variation using the unilateral conduction of diode
The circuit of unidirectional voltage, under the action of AC power source, rectifier diode periodically on and off makes load obtain direct current
Electricity.In switching process, since entire circuit is in uncontrollable rectifier state, power factor is very low, while can also generate biggish
Harmonic wave, to influence properties of product.
Since inverter circuit has the characteristics that circuit structure is similar with rectification circuit, in actually utilizing, often formed inverse
Become the two-way changing circuit that rectification is integrated.Currently, this two-way changing circuit mostly uses full-bridge circuit structure, it is seen that Fig. 1.When
When inverter mode, inductance L1, capacitor C2 carry out work according to timing requirements as inversion output filter circuit, field-effect tube Q3, Q4
Frequency switches, and executes commutation and needs, and field-effect tube Q5, Q6 carries out high frequency switching, executes sinusoidal copped wave；When rectification state, utilize
For inductance L1 as PFC (Power Factor Correction, PFC) inductance, the action mode of field-effect tube is same
Inverter mode.The structure of such circuit is simple, is only able to achieve inversion rectification application of less demanding, however it remains afterflow is returned
Road is long, loss is big, EMC (Electro Magnetic Compatibility, Electro Magnetic Compatibility) difference problem.
Summary of the invention
The present invention solves the technical problem of existing inversion rectification circuits there are continuous current circuit length, big lack is lost
Point.To solve the above problems, this application provides a kind of novel bi-directional conversion devices.
According in a first aspect, providing a kind of novel two-way DC-AC conversion equipment in a kind of embodiment, comprising:
Reversing unit, including inversion rectification circuit and the first sending end being connect with the inversion rectification circuit, second
Sending end and control terminal；
Switch unit, including buck-boost circuit and with the first connecting pin of the buck-boost circuit connection,
Second connection end and control terminal, first connecting pin for connecting DC power supply or DC load, the second connection end with
First sending end connection in the reversing unit；
In filter unit, including third connecting pin and the 4th connecting pin, the third connecting pin and the reversing unit
The second sending end connection, the 4th connecting pin is for connecting AC power source or AC load；
Control unit is connect, for controlling respectively with the control terminal of the control terminal of the reversing unit and the switch unit
The inversion timing or rectification timing of the inversion rectification circuit in the reversing unit are made, and for controlling the switch unit
In the buck-boost circuit direct current on off operating mode.
The inversion rectification circuit is single-phase bridge controlable electric current, and the DC terminal of the single-phase bridge controlable electric current forms institute
The first sending end is stated, exchange end forms second sending end, and the control terminal of the single-phase bridge controlable electric current forms described change
To the control terminal of unit.
The single-phase bridge controlable electric current includes field-effect tube Q3, field-effect tube Q4, field-effect tube Q5 and field-effect tube Q6,
The input, output end of the field-effect tube Q3 respectively with the input terminal of the field-effect tube Q5, the field-effect tube Q4 it is defeated
Enter end connection, the input, output end of the field-effect tube Q6 respectively with the output end of the field-effect tube Q4, the field-effect
The output end of pipe Q5 connects；
The cooperation of the output end of the input terminal of the field-effect tube Q3 and the field-effect tube Q4 constitutes the single-phase bridge can
The DC terminal of circuit is controlled, the output end cooperation of the output end of the field-effect tube Q3 and the field-effect tube Q5 constitute described single-phase
The exchange end of bridge-type controlable electric current, each automatic control of the field-effect tube Q3, field-effect tube Q4, field-effect tube Q5 and field-effect tube Q6
End cooperation processed constitutes the control terminal of the single-phase bridge controlable electric current.
The buck-boost circuit includes field-effect tube Q1 and field-effect tube Q2, the output end of the field-effect tube Q1 with
The input terminal connection of the input terminal of the field-effect tube Q2, the field-effect tube Q3, the output end of the field-effect tube Q2 and institute
State the output end connection of field-effect tube Q4；
The input terminal of the field-effect tube Q1, the field-effect tube Q2 output end cooperatively form in the switch unit
First connecting pin, the output end of the field-effect tube Q1, the field-effect tube Q2 output end cooperatively form the switch unit
In second connection end.
The switch unit further includes capacitor C1, and the capacitor C1 is connected in parallel on described in the buck-boost circuit
On one connecting pin, one end of the capacitor C1 is connect with the input terminal of the field-effect tube Q1, the other end and the field-effect tube
The output end of Q2 connects.
The filter unit includes inductance L1 and capacitor C2, the output of one end of the inductance L1 and the field-effect tube Q5
End connection, the other end are connect with one end of the capacitor C2, the output of the other end of the capacitor C2 and the field-effect tube Q3
End connection；
One end of the inductance L1 cooperatively forms the third in the filter unit with the other end of the capacitor C2 and connects
End, the both ends of the capacitor C2 cooperatively form the 4th connecting pin in the filter unit.
Described control unit includes multiple enable ends, respectively with the field-effect tube Q3, field-effect tube Q4, field-effect tube
The respective control terminal connection of Q5, field-effect tube Q6, and connect respectively with the respective control terminal of the field-effect tube Q1, field-effect tube Q2
It connects；
Described control unit by the field-effect tube Q3, field-effect tube Q4, field-effect tube Q5, field-effect tube Q6 it is each
It is single to control the inversion timing of the inversion rectification circuit or rectification timing, the control to send enable signal respectively from control terminal
Member controls the buck- by sending enable signal respectively to the respective control terminal of the field-effect tube Q1, field-effect tube Q2
The direct current on off operating mode of boost circuit.
According to second aspect, a kind of DC-AC inversion system is provided in a kind of embodiment, comprising:
The two-way DC-AC conversion equipment as described in above-mentioned first aspect, including the first connecting pin and the 4th connecting pin；
DC power supply and AC load are connect with the first connecting pin and the 4th of the two-way DC-AC conversion equipment respectively
End connection；
The two-way DC-AC conversion equipment receives the direct current of the DC power supply, is single phase ac by DC inverter
The AC load is delivered to after electricity.
According to the third aspect, a kind of AC-DC commutation system is provided in a kind of embodiment, comprising:
Two-way DC-AC conversion equipment as described in above-mentioned first aspect, including the first connecting pin and the 4th connecting pin；
AC power source and DC load are connect with the 4th connecting pin and first of the two-way DC-AC conversion equipment respectively
End connection；
The two-way DC-AC conversion equipment receives the single-phase alternating current of the AC power source, and single-phase alternating current is rectified into
The DC load is delivered to after direct current.
One kind of above-described embodiment novel two-way DC-AC conversion equipment and inversion system, commutation system, described is two-way
DC-AC conversion equipment includes reversing unit, switch unit, filter unit and control unit.It will be single in the technical solution of the application
Phase full-bridge controlable electric current is combined with buck-boost circuit, carries out copped wave by buck-boost circuit in reversals,
SPWM waveform is formed, so that direct current is converted to single-phase alternating current by single-phase full bridge controlable electric current, this in the process can be effective
It reduces the loss of field-effect tube, improve the utilization rate of filter inductance, while reducing the EMI of device；By buck- in switching process
Boost circuit is matched with filter inductance, when single-phase full bridge controlable electric current does power frequency switching, is conducive to buck-boost circuit and is made
For PFC and control output voltage, the EMI interference for additionally aiding and reducing the loss of field-effect tube, reduce device, so as to improve direct current
Side output characteristics.
Detailed description of the invention
Fig. 1 is the structure chart of existing two-way changing circuit；
Fig. 2 is the structural schematic diagram of two-way DC-AC conversion equipment in an embodiment；
Fig. 3 is the circuit diagram of two-way DC-AC conversion equipment in an embodiment；
Fig. 4 is one of two-way DC-AC conversion equipment inversion working principle diagram；
Fig. 5 is the two of two-way DC-AC conversion equipment inversion working principle diagram；
Fig. 6 is the three of two-way DC-AC conversion equipment inversion working principle diagram；
Fig. 7 is the four of two-way DC-AC conversion equipment inversion working principle diagram；
Fig. 8 is that two-way DC-AC conversion equipment rectifies one of working principle diagram；
Fig. 9 is that two-way DC-AC conversion equipment rectifies the two of working principle diagram；
Figure 10 is that two-way DC-AC conversion equipment rectifies the three of working principle diagram；
Figure 11 is that two-way DC-AC conversion equipment rectifies the four of working principle diagram；
Figure 12 is the circuit diagram of DC-AC inversion system in an embodiment；
Figure 13 is the circuit diagram of AC-DC commutation system in an embodiment.
Specific embodiment
Below by specific embodiment combination attached drawing, invention is further described in detail.Wherein different embodiments
Middle similar component uses associated similar element numbers.In the following embodiments, many datail descriptions be in order to
The application is better understood.However, those skilled in the art can recognize without lifting an eyebrow, part of feature
It is dispensed, or can be substituted by other elements, material, method in varied situations.In some cases, this Shen
Please it is relevant it is some operation there is no in the description show or describe, this is the core in order to avoid the application by mistake
More descriptions are flooded, and to those skilled in the art, these relevant operations, which are described in detail, not to be necessary, they
Relevant operation can be completely understood according to the general technology knowledge of description and this field in specification.
It is formed respectively in addition, feature described in this description, operation or feature can combine in any suitable way
Kind embodiment.Meanwhile each step in method description or movement can also can be aobvious and easy according to those skilled in the art institute
The mode carry out sequence exchange or adjustment seen.Therefore, the various sequences in the description and the appended drawings are intended merely to clearly describe a certain
A embodiment is not meant to be necessary sequence, and wherein some sequentially must comply with unless otherwise indicated.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).
Embodiment one:
Referring to FIG. 2, the application discloses a kind of novel two-way DC-AC conversion equipment 1 comprising reversing unit 11 is opened
Unit 12, filter unit 13 and control unit 14 are closed, is illustrated separately below.
Reversing unit 11 include inversion rectification circuit (unmarked in figure) and connect with the inversion rectification circuit first
Sending end 111, the second sending end 112 and control terminal 113.In one embodiment, inversion rectification circuit here is single-phase bridge
Controlable electric current, and the DC terminal of single-phase bridge controlable electric current forms the first sending end 111, exchange end forms the second sending end 112,
The control terminal of single-phase bridge controlable electric current forms the control terminal 113 of reversing unit 11.
In one embodiment, see that Fig. 3, single-phase bridge controlable electric current (unmarked in figure) include field-effect tube Q3, field
Effect pipe Q4, field-effect tube Q5 and field-effect tube Q6.The input, output end of field-effect tube Q3 is defeated with field-effect tube Q5 respectively
Enter the input terminal connection at end, field-effect tube Q4, the output with field-effect tube Q4 respectively of the input, output end of field-effect tube Q6
The output end connection at end, field-effect tube Q5.So that the output end cooperation of the input terminal and field-effect tube Q4 of field-effect tube Q3
Constitute the DC terminal (i.e. the first sending end 111) of the single-phase bridge controlable electric current, the output end and field-effect tube of field-effect tube Q3
The output end cooperation of Q5 constitutes the exchange end (i.e. the second sending end 112) of the single-phase bridge controlable electric current, field-effect tube Q3, field effect
Should the respective control terminal cooperation of pipe Q4, field-effect tube Q5 and field-effect tube Q6 constitute the control terminal of the single-phase bridge controlable electric current
(i.e. control terminal 113).
Can refer to Fig. 2 and Fig. 3, switch unit 12 include buck-boost circuit (unmarked in figure) and with the buck-
The first connecting pin 121, second connection end 122 and the control terminal 123 of boost circuit connection, the first connecting pin 121 here are used for
DC power supply or DC load are connected, and second connection end 122 is connect with the first sending end 111 in reversing unit 11.
In one embodiment, see that Fig. 3, buck-boost circuit include field-effect tube Q1 and field-effect tube Q2, field effect
Should the output end of pipe Q1 connect with the input terminal of the input terminal of field-effect tube Q2, field-effect tube Q3, the output end of field-effect tube Q2
It is connect with the output end of field-effect tube Q4.So that the output end of the input terminal of field-effect tube Q1, field-effect tube Q2 cooperate shape
At the first connecting pin 121 in switch unit 12, the output end of field-effect tube Q1, the output end of field-effect tube Q2 are cooperatively formed out
Close the second connection end 122 in unit 121.
Further, see that Fig. 3, switch unit 12 further include capacitor C1, capacitor C1 is connected in parallel in buck-boost circuit
The first connecting pin 121 on, one end of capacitor C1 is connect with the input terminal of field-effect tube Q1, and the other end is defeated with field-effect tube Q2's
Outlet connection.
It should be noted that Buck-Boost circuit belongs to common circuit structure, also referred to as step-down/up type converter, it is one
Kind of output voltage, which both can be lower than or be higher than, is input into the single tube of voltage not isolated DC converter, but the polarity of its output voltage with
It is opposite to be input into voltage.Buck-Boost circuit can regard that Buck converter and Boost are connected in series as, incorporate field effect
It answers Guan Eryi, output voltage U0 to be more than or less than and is input into voltage Ui, polarity is on the contrary, inductive transmission.Buck converter also known as drops
Chopper is pressed, output even voltage U0, which is less than, is input into voltage Ui, and polarity is identical；And Boost is also known as boost chopper,
It exports even voltage U0 greater than voltage Ui is input into, and polarity is identical.
It can refer to Fig. 2 and Fig. 3, filter unit 13 includes third connecting pin 131 and the 4th connecting pin 132, third connecting pin
131 connect with the second sending end 112 in reversing unit 11, and the 4th connecting pin 132 is negative for connecting AC power source or exchange
It carries.
In one embodiment, see that Fig. 3, filter unit 13 include inductance L1 and capacitor C2, one end and field of inductance L1
The output end of effect pipe Q5 connects, and the other end is connect with one end of capacitor C2, and the other end of capacitor C2 is with field-effect tube Q3's
Output end connection.So that one end of inductance L1 and the other end of capacitor C2 cooperatively form the company of the third in filter unit 13
End 131 is connect, the both ends of capacitor C2 cooperatively form the 4th connecting pin 132 in filter unit 13.
It should be noted that filter unit 13 here is regarded as a kind of passive PFC circuit structure, mainly using passive
Device (inductance, capacitor etc.) changes input power factor, reduces current harmonics, to meet filtering requirements.This kind of passive PFC
The characteristics of circuit is that structure is simple, adaptable without control.
It can refer to Fig. 2 and Fig. 3, the control with the control terminal 113 of reversing unit 11 and switch unit 12 respectively of control unit 14
End 123 processed connects, for controlling the inversion timing or rectification timing of the inversion rectification circuit in reversing unit 11, and for controlling
The direct current on off operating mode of buck-boost circuit in switch unit 12.
In one embodiment, see Fig. 3, control unit 14 includes multiple enable ends (unmarked in figure), respectively with field
Effect pipe Q3, field-effect tube Q4, field-effect tube Q5, field-effect tube Q6 respective control terminal connection, and respectively with field-effect tube Q1,
The respective control terminal of field-effect tube Q2 connects.So that control unit 14 is by field-effect tube Q3, field-effect tube Q4, field
Effect pipe Q5, field-effect tube Q6 respective control terminal send enable signal respectively control the inversion timing of inversion rectification circuit or
Rectify timing, control unit 14 by the respective control terminal of field-effect tube Q1, field-effect tube Q2 send respectively enable signal come
Control the direct current on off operating mode of buck-boost circuit.
It should be noted that in a first aspect, inversion rectification circuit (i.e. field-effect tube Q3, Q4, Q5, Q6 institute composition part)
Inversion timing or rectification timing already belong to it is known in industry, can be by periodically adjusting field-effect tube Q4, Q5 (or field
Effect pipe Q3, Q6) on off operating mode carry out the flow direction of switching current in the line, so that direct current is converted to exchange, or will hand over
Circulation is changed to direct current.Since the inversion timing and rectification timing of the part belong to the prior art, will no longer carry out here in detail
Describe in detail it is bright, moreover, the waveform state (such as sine wave, PWM wave, SPWM wave) of used enable signal is also no longer limited.
The direct current on off operating mode of second aspect, buck-boost circuit (i.e. field-effect tube Q1, Q2 institute composition part) also already belongs to go
In the industry known, can determine the on off operating mode of field-effect tube Q1, Q2, the direct current by the enable signal of voltage or current forms
Existing control technology can be used in the control mode of on-off, and the control technology of the following appearance can also be used, here no longer to its into
Row limits.
For support technician it is accurate, clearly understand the invention, below in conjunction with Fig. 4-Fig. 7 to above-mentioned two-way DC-
The inversion working principle of AC conversion equipment 1 is described in detail, and combines Fig. 8-Figure 11 to the whole of two-way DC-AC conversion equipment 1
Stream working principle is described in detail.
It can refer to Fig. 4-Fig. 7, it should be by the first connecting pin 121 of two-way DC-AC conversion equipment 1 and a DC power supply Vdc
Connection, the 4th connecting pin 132 is connect with an AC load, and control unit 14 is sent out to reversing unit 11, switch unit 12 respectively
Enable signal is sent, so that two-way DC-AC conversion equipment 1 enters inversion working condition.
When being in inversion positive half period, control field-effect tube Q1 is in high frequency debugging mode, controls field-effect tube Q4, Q5
In constant conduction state, while controlling field-effect tube Q2, Q3, Q6 and being in and continuing off state.At this point, if field-effect tube Q1 tune
Examination conducting, then electric current successively pass through field-effect tube Q1, Q5, inductance L1, AC load, field-effect tube Q4 circuit be back to direct current
Power supply Vdc so that inductance L1, capacitor C2 charge, and externally provides energy, specific energy stream by inductance L1, capacitor C2
To seeing Fig. 4；If the body diode of field-effect tube Q1 debugging shutdown, field-effect tube Q5 and field-effect tube Q3 provide continuous for inductance L1
Road is flowed back to, specific energy flow direction is shown in Fig. 5.
When being in inversion negative half-cycle, control field-effect tube Q1 is in high frequency debugging mode, controls field-effect tube Q3, Q6
In constant conduction state, while controlling field-effect tube Q2, Q4, Q5 and being in and continuing off state.At this point, if field-effect tube Q1 tune
Examination conducting, then electric current successively pass through field-effect tube Q1, Q3, AC load, inductance L1, field-effect tube Q6 circuit be back to direct current
Power supply Vdc so that inductance L1, capacitor C2 charge, and externally provides energy, specific energy stream by inductance L1, capacitor C2
To seeing Fig. 6；If field-effect tube Q1 debugging shutdown, the body diode of field-effect tube Q5 provide continuous current circuit for inductance L1, specifically
Energy flow direction see Fig. 7.
By the principles of reversals explanation it is found that when inversion, inductance described in inversion and inductance L1 (or PFC inductance) are altogether
With it is abundant with single-phase full bridge controlable electric current to have played buck circuit in buck-boost circuit (i.e. circuit shown in field-effect tube Q1)
In conjunction with advantage, so that buck circuit generates SPWM, single-phase full bridge controlable electric current realizes commutation function, so that switching loss is reduced,
The anti-emi properties (i.e. electromagnetism interference characteristic) of lifting device.
It can refer to Fig. 8-Figure 11, it should be by the 4th connecting pin 132 of two-way DC-AC conversion equipment 1 and an AC power source
First connecting pin 121 is connect by Vac connection with a DC load, and control unit 14 is respectively to reversing unit 11, switch unit 12
Enable signal is sent, so that two-way DC-AC conversion equipment 1 enters rectification working condition.
When in rectification positive half period, control field-effect tube Q2 is in high frequency debugging mode, controls field-effect tube Q4, Q5
In constant conduction state, while controlling field-effect tube Q1, Q3, Q6 and being in and continuing off state.At this point, if field-effect tube Q2 tune
Examination conducting, then electric current successively passes through inductance L1, the circuit of field-effect tube Q5, Q2, Q4 are back to AC power source Vac, so that inductance
L1, capacitor C2 charging, specific energy flow direction are shown in Fig. 8；If field-effect tube Q2 debugging shutdown, two pole of body of field-effect tube Q1
Pipe, capacitor C1 and field-effect tube Q4, Q5 provide continuous current circuit for inductance L1, and inductance L1 discharges electric energy, and specific energy flow direction is shown in
Fig. 9.
When being in inversion negative half-cycle, control field-effect tube Q2 is in high frequency debugging mode, controls field-effect tube Q3, Q6
In constant conduction state, while controlling field-effect tube Q2, Q4, Q5 and being in and continuing off state.At this point, if field-effect tube Q2 tune
Examination conducting, then electric current successively pass through field-effect tube Q3, Q2, Q6, inductance L1 circuit be back to AC power source Vac so that inductance
L1, capacitor C2 charging, specific energy flow direction are shown in Figure 10；If field-effect tube Q1 debugging shutdown, two pole of body of field-effect tube Q5
Pipe, capacitor C1 and field-effect tube Q3, Q6 provide continuous current circuit for inductance L1, and inductance L1 releases energy, specific energy flow direction
See Figure 11.
By the principle explanation of switching process it is found that when rectifying, the inductance and inductance L1 (or PFC inductance) are rectified altogether
With having played boost circuit in buck-boost circuit (i.e. circuit shown in field-effect tube Q2) and filled with single-phase full bridge controlable electric current
Divide the advantage of combining, so that boost circuit realizes commutation function as PFC and control output voltage, single-phase full bridge controlable electric current, from
And switching loss is reduced, the anti-emi properties (i.e. electromagnetism interference characteristic) of lifting device promotes DC side output performance.
Embodiment two:
Figure 12 is please referred to, correspondingly, the application discloses a kind of DC-AC inversion system 2 comprising two-way in embodiment one
DC-AC conversion equipment 1, DC power supply Power1 and AC load Load1.
Two-way DC-AC conversion equipment 1 includes the first connecting pin 121 and the 4th connecting pin 132, is converted about two-way DC-AC
Specific structure and inversion the working principle explanation of device 1 can refer to related content in embodiment one, and which is not described herein again.
DC power supply Power1 and AC load Load1 respectively with the first connecting pin 121 of two-way DC-AC conversion equipment 1
It is connected with the 4th connecting pin 132.Two-way DC-AC conversion equipment 1 can receive the direct current of DC power supply Power1, and direct current is inverse
Become being delivered to AC load Load1 after single-phase alternating current.
Embodiment three:
Correspondingly, a kind of AC-DC commutation system 3 is also disclosed in the application comprising the two-way DC-AC conversion in embodiment one
Device 1, AC power source Power2 and DC load Load2.
Two-way DC-AC conversion equipment 1 includes the first connecting pin 121 and the 4th connecting pin 132, is converted about two-way DC-AC
The specific structure and rectification working principle explanation of device 1 can refer to related content in embodiment one, and which is not described herein again.
The 4th connecting pin 132 with two-way DC-AC conversion equipment 1 respectively AC power source Power2 and DC load Load2
It is connected with the first connecting pin 121.Two-way DC-AC conversion equipment 1 can receive the single-phase alternating current of AC power source Power2, will be single-phase
AC rectification is that direct current is delivered to DC load Load2 later.
Use above specific case is illustrated the present invention, is merely used to help understand the present invention, not to limit
The system present invention.For those skilled in the art, according to the thought of the present invention, can also make several simple
It deduces, deform or replaces.
Claims (9)
1. a kind of novel two-way DC-AC conversion equipment characterized by comprising
Reversing unit, including inversion rectification circuit and the first sending end being connect with the inversion rectification circuit, the second transmission of electricity
End and control terminal；
Switch unit, including buck-boost circuit and with the first connecting pin of the buck-boost circuit connection, second
Connecting pin and control terminal, first connecting pin for connecting DC power supply or DC load, the second connection end with it is described
First sending end connection in reversing unit；
Filter unit, including third connecting pin and the 4th connecting pin, the third connecting pin with it is described in the reversing unit
The connection of second sending end, the 4th connecting pin is for connecting AC power source or AC load；
Control unit is connect, for controlling respectively with the control terminal of the control terminal of the reversing unit and the switch unit
The inversion timing or rectification timing of the inversion rectification circuit in reversing unit are stated, and for controlling in the switch unit
The direct current on off operating mode of the buck-boost circuit.
2. two-way DC-AC conversion equipment as described in claim 1, which is characterized in that the inversion rectification circuit is single-phase bridge
Formula controlable electric current, the DC terminal of the single-phase bridge controlable electric current form first sending end, and exchange end forms described second
The control terminal of sending end, the single-phase bridge controlable electric current forms the control terminal of the reversing unit.
3. two-way DC-AC conversion equipment as claimed in claim 2, which is characterized in that the single-phase bridge controlable electric current includes
The input, output end point of field-effect tube Q3, field-effect tube Q4, field-effect tube Q5 and field-effect tube Q6, the field-effect tube Q3
It is not connect with the input terminal of the input terminal of the field-effect tube Q5, the field-effect tube Q4, the input terminal of the field-effect tube Q6,
Output end is connect with the output end of the output end of the field-effect tube Q4, the field-effect tube Q5 respectively；
The cooperation of the output end of the input terminal of the field-effect tube Q3 and the field-effect tube Q4 constitutes the single-phase bridge controllable electric
The output end cooperation of the DC terminal on road, the output end of the field-effect tube Q3 and the field-effect tube Q5 constitute the single-phase bridge
The exchange end of controlable electric current, the respective control terminal of the field-effect tube Q3, field-effect tube Q4, field-effect tube Q5 and field-effect tube Q6
Cooperation constitutes the control terminal of the single-phase bridge controlable electric current.
4. two-way DC-AC conversion equipment as claimed in claim 3, which is characterized in that the buck-boost circuit includes field
The input terminal of effect pipe Q1 and field-effect tube Q2, the output end of the field-effect tube Q1 and the field-effect tube Q2, the field are imitated
Should pipe Q3 input terminal connection, the output end of the field-effect tube Q2 connect with the output end of the field-effect tube Q4；
The input terminal of the field-effect tube Q1, the field-effect tube Q2 output end cooperatively form in the switch unit first
Connecting pin, the output end of the field-effect tube Q1, the field-effect tube Q2 output end cooperatively form in the switch unit
Second connection end.
5. two-way DC-AC conversion equipment as claimed in claim 4, which is characterized in that the switch unit further includes capacitor C1,
The capacitor C1 is connected in parallel on first connecting pin in the buck-boost circuit, one end of the capacitor C1 with it is described
The input terminal of field-effect tube Q1 connects, and the other end is connect with the output end of the field-effect tube Q2.
6. two-way DC-AC conversion equipment as claimed in claim 3, which is characterized in that the filter unit include inductance L1 and
Capacitor C2, one end of the inductance L1 are connect with the output end of the field-effect tube Q5, one end of the other end and the capacitor C2
Connection, the other end of the capacitor C2 are connect with the output end of the field-effect tube Q3；
The other end of one end of the inductance L1 and the capacitor C2 cooperatively form the third connecting pin in the filter unit, institute
The both ends for stating capacitor C2 cooperatively form the 4th connecting pin in the filter unit.
7. the two-way DC-AC conversion equipment as described in any one of claim 3-6, which is characterized in that described control unit packet
Include multiple enable ends, respectively with the respective control of the field-effect tube Q3, field-effect tube Q4, field-effect tube Q5, field-effect tube Q6
End connection, and connect respectively with the respective control terminal of the field-effect tube Q1, field-effect tube Q2；
Described control unit passes through each automatic control to the field-effect tube Q3, field-effect tube Q4, field-effect tube Q5, field-effect tube Q6
It is logical to control the inversion timing of the inversion rectification circuit or rectification timing, described control unit that end processed sends enable signal respectively
It crosses and sends enable signal respectively to the respective control terminal of the field-effect tube Q1, field-effect tube Q2 to control the buck-boost
The direct current on off operating mode of circuit.
8. a kind of DC-AC inversion system characterized by comprising
Such as the described in any item two-way DC-AC conversion equipments of claim 1-7, including the first connecting pin and the 4th connecting pin；
DC power supply and AC load connect with the first connecting pin of the two-way DC-AC conversion equipment and the 4th connecting pin respectively
It connects；
The two-way DC-AC conversion equipment receives the direct current of the DC power supply, by DC inverter be single-phase alternating current it
After be delivered to the AC load.
9. a kind of AC-DC commutation system characterized by comprising
Such as the described in any item two-way DC-AC conversion equipments of claim 1-7, including the first connecting pin and the 4th connecting pin；
AC power source and DC load connect with the 4th connecting pin of the two-way DC-AC conversion equipment, the first connecting pin respectively
It connects；
The two-way DC-AC conversion equipment receives the single-phase alternating current of the AC power source, and single-phase alternating current is rectified into direct current
The DC load is delivered to after electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821826449.3U CN209250520U (en) | 2018-11-05 | 2018-11-05 | A kind of novel two-way DC-AC conversion equipment and inversion system, commutation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821826449.3U CN209250520U (en) | 2018-11-05 | 2018-11-05 | A kind of novel two-way DC-AC conversion equipment and inversion system, commutation system |
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| Publication Number | Publication Date |
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| CN209250520U true CN209250520U (en) | 2019-08-13 |
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| CN201821826449.3U Active CN209250520U (en) | 2018-11-05 | 2018-11-05 | A kind of novel two-way DC-AC conversion equipment and inversion system, commutation system |
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| Country | Link |
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| CN (1) | CN209250520U (en) |
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2018
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