CN108448920A - A kind of five-electrical level inverter - Google Patents
A kind of five-electrical level inverter Download PDFInfo
- Publication number
- CN108448920A CN108448920A CN201810273466.7A CN201810273466A CN108448920A CN 108448920 A CN108448920 A CN 108448920A CN 201810273466 A CN201810273466 A CN 201810273466A CN 108448920 A CN108448920 A CN 108448920A
- Authority
- CN
- China
- Prior art keywords
- bridge arm
- diode
- arm
- switching tube
- inductance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/38—Means for preventing simultaneous conduction of switches
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
Abstract
The present invention relates to a kind of five-electrical level inverters, H-bridge circuit including three-level DC converter and with inversion function, H-bridge circuit includes the first arm path and the second arm path, bridge arm includes first switch pipe on the first of first arm path, second switch pipe, first lower bridge arm includes third switching tube, 4th switching tube, bridge arm includes the 5th switching tube on the second of second arm path, second lower bridge arm includes the 6th switching tube, the first inductance and the second inductance are equipped in first arm path, first lower bridge arm passes through diode, bridge arm is separately connected the power supply of three-level DC converter by another diode on first.The present invention is in the first arm path by the way of switching tube and Diode series and inductance access major loop; when primary side drive signal mistake leads to the bridge arm direct pass; the diode of setting can prevent bridge arm direct pass; switching tube on effective protection bridge arm will not damage; the functional reliability of switching tube is improved, and dead zone need not be arranged in switching tube.
Description
Technical field
The invention belongs to power electronics fields, and in particular to a kind of five-electrical level inverter.
Background technology
In recent years, many researchers are dedicated to proposing new inverter topology or improve original inversion topological knot
Structure.Five-electrical level inverter has output voltage wave closer to sine wave, and voltage ladder saltus step is small, du/dt smallers, has relatively low
Electromagnetic interference and percent harmonic distortion；Switching device bears that voltage stress is small, reduces the requirement to switching device, therefore occur
Various five-electrical level inverters topologys.
In the prior art, a kind of five-electrical level inverter is referred in the Chinese patent that notification number is CN20370813U, is such as schemed
Shown in 1, including three-level DC converter and the H-bridge circuit with inversion function.Wherein, three-level DC converter include according to
Secondary concatenated power supply, capacitance C1, capacitance C2, connection the earth (the i.e. reference of three-level DC converter between capacitance C1, capacitance C2
Point).H-bridge circuit includes in parallel the first arm path and the second arm path, the first arm path include on first bridge arm and
First lower bridge arm, bridge arm includes the first switch pipe (including S1, D3) of connection, second switch pipe (including S2, D4) on first, the
The tie point of one switching tube and second switch pipe is connected to the earth by diode D1, and the first lower bridge arm includes that the third of connection is opened
It closes and manages (including S1c, D5), the 4th switching tube (including S2c, D6), the tie point of third switching tube and the 4th switching tube passes through two
Pole pipe D2 connection the earth；Second arm path includes bridge arm and the second lower bridge arm on second, and bridge arm includes the 5th switch on second
It manages (including S3, D7), the second lower bridge arm includes the 6th switching tube (including S4, D8), the output end connection load of inverter, load
It is equivalent at concatenated resistance R1 and inductance.The five-electrical level inverter is disadvantageous in that bridge arm will appear straight-through situation, can
It is relatively low by property.
Invention content
The object of the present invention is to provide a kind of five-electrical level inverter, the five-electrical level inverter for solving the prior art is opened
Close the low problem of pipe functional reliability.
In order to solve the above technical problems, the present invention proposes a kind of one-phase five-level inverter, including three level DC transformation
Device and H-bridge circuit with inversion function, H-bridge circuit include the first arm path and the second arm path in parallel, the first bridge
Arm branch includes bridge arm and the first lower bridge arm on first, and bridge arm includes the first switch pipe of connection, second switch pipe on first, the
One switching tube connects the reference point of three-level DC converter with the tie point of second switch pipe by the first diode, under first
Bridge arm includes the third switching tube of connection, the 4th switching tube, and the tie point of third switching tube and the 4th switching tube passes through the two or two
Pole pipe connects the reference point；Second arm path includes bridge arm and the second lower bridge arm on second, and bridge arm includes the 5th on second
Switching tube, the second lower bridge arm include the 6th switching tube；
The first inductance and the second inductance are equipped in first arm path, bridge arm on first, the first inductance, the second inductance, the
One lower bridge arm is sequentially connected, and the first lower bridge arm is connected to the both ends of power of three-level DC converter by third diode, the
Bridge arm is connected to the both ends of power of three-level DC converter by the 4th diode on one.
The present invention uses switching tube in the first arm path of H-bridge circuit and is led back with Diode series and inductance access
The mode on road, when primary side drive signal mistake leads to the bridge arm direct pass, the diode of setting can prevent bridge arm direct pass, effectively
It protects the switching tube on bridge arm not damage, improves the functional reliability of switching tube, meanwhile, switching tube need not be arranged extremely
Area.
Further, third inductance and the 4th inductance are equipped in the second arm path, bridge arm, third inductance, the 4th on second
Inductor, the second lower bridge arm are sequentially connected, and the second lower bridge arm is connected to the electricity of three-level DC converter by the 5th diode
Source both ends, bridge arm is connected to the both ends of power of three-level DC converter by the 6th diode on second.
The present invention equally uses switching tube in the second arm path of H-bridge circuit and is accessed with Diode series and inductance
The mode of major loop, when primary side drive signal mistake leads to the bridge arm direct pass, the diode of setting can prevent bridge arm direct pass,
Switching tube on effective protection bridge arm will not damage, and improve the functional reliability of switching tube, meanwhile, switching tube need not be arranged
Dead zone.
In order to solve the above technical problems, the invention also provides a kind of one-phase five-level inverter, including three level DC
Converter and H-bridge circuit with inversion function, H-bridge circuit include the first arm path and the second arm path in parallel, the
One arm path includes bridge arm and the first lower bridge arm on first, and bridge arm includes the first switch pipe of connection, second switch on first
Pipe, first switch pipe connect the reference point of three-level DC converter with the tie point of second switch pipe by the first diode,
First lower bridge arm includes the third switching tube of connection, the 4th switching tube, and the tie point of third switching tube and the 4th switching tube passes through
Second diode connects the reference point；Second arm path includes bridge arm and the second lower bridge arm on second, bridge arm packet on second
The 5th switching tube is included, the second lower bridge arm includes the 6th switching tube；
The first inductance and the second inductance are equipped in second arm path, bridge arm on second, the first inductance, the second inductance, the
Two lower bridge arms are sequentially connected, and the second lower bridge arm is connected to the both ends of power of three-level DC converter by third diode, the
Bridge arm is connected to the both ends of power of three-level DC converter by the 4th diode on one.
The present invention uses switching tube in H-bridge circuit in the second arm path and is led back with Diode series and inductance access
The mode on road, when primary side drive signal mistake leads to the bridge arm direct pass, the diode of setting can prevent bridge arm direct pass, effectively
It protects the switching tube on bridge arm not damage, improves the functional reliability of switching tube, meanwhile, switching tube need not be arranged extremely
Area.
Further, bridge arm is parallel with bridge arm diode branch on first, and the first lower bridge arm is parallel with lower bridge arm diode
Branch, is both provided with corresponding diode in upper bridge arm diode branch and lower bridge arm diode branch, bridge arm and on first
One lower bridge arm is by third inductance for connecting power grid or the AC port of load.
The present invention is by bridge arm, the first lower bridge arm on first respectively in parallel upper bridge arm diode branch, lower bridge arm two
Pole pipe branch makes the circuit for flowing through switching tube halve in such a way that switching tube and diodes in parallel use, and plays the work of shunting
With.
Further, the upper bridge arm diode branch includes concatenated 5th diode, the 6th diode, the 5th diode
In parallel with first switch pipe, the 6th diode is in parallel with second switch pipe；The lower bridge arm diode branch includes concatenated
Seven diodes, the 8th diode, the 7th diode and third paralleled power switches, the 8th diode and the 4th paralleled power switches.
All switching tubes of the first arm path of the present invention are respectively parallel with diode, make to flow through each switching tube
Electric current halves, and further improves current flowing ability.
In order to solve the above technical problems, the invention also provides a kind of one-phase five-level inverter, including three level DC
Converter and H-bridge circuit with inversion function, H-bridge circuit include the first arm path and the second arm path in parallel, the
One arm path includes bridge arm and the first lower bridge arm on first, and bridge arm includes the first switch pipe of connection, second switch on first
Pipe, first switch pipe connect the reference point of three-level DC converter with the tie point of second switch pipe by the first diode,
First lower bridge arm includes the third switching tube of connection, the 4th switching tube, and the tie point of third switching tube and the 4th switching tube passes through
Second diode connects the reference point；Second arm path includes bridge arm and the second lower bridge arm on second, bridge arm packet on second
The 5th switching tube, the 6th switching tube of connection are included, the second lower bridge arm includes the 7th switching tube of connection, the 8th switching tube；
The first inductance and the second inductance are equipped in first arm path, bridge arm on first, the first inductance, the second inductance, the
One lower bridge arm is sequentially connected, and the first lower bridge arm is connected to the both ends of power of three-level DC converter by third diode, the
Bridge arm is connected to the both ends of power of three-level DC converter by the 4th diode on one；
Third inductance and the 4th inductance are equipped in second arm path, bridge arm on second, third inductance, the 4th inductance, the
Two lower bridge arms are sequentially connected, and the second lower bridge arm is connected to the both ends of power of three-level DC converter by the 5th diode, the
Bridge arm is connected to the both ends of power of three-level DC converter by the 6th diode on two.
The first arm path and the second arm path of the present invention uses identical circuit structure, and each arm path is equal
The mode for using switching tube and Diode series and inductance access major loop, when primary side drive signal mistake causes the bridge arm straight
When logical, the diode of setting can prevent bridge arm direct pass, and the switching tube on effective protection bridge arm will not damage, and improve switch
The functional reliability of pipe, meanwhile, dead zone need not be arranged in switching tube.
In order to solve the above technical problems, the invention also provides a kind of three-phase five-level inverter, wherein five electricity of each phase
Flat inverter includes three-level DC converter, and the H-bridge circuit with inversion function, H-bridge circuit includes the first bridge of parallel connection
Arm branch and the second arm path, the first arm path include bridge arm and the first lower bridge arm on first, and bridge arm includes connecting on first
First switch pipe, the second switch pipe connect, first switch pipe connect three with the tie point of second switch pipe by the first diode
The reference point of level DC converter, the first lower bridge arm include connection third switching tube, the 4th switching tube, third switching tube and
The tie point of 4th switching tube connects the reference point by the second diode；Second arm path includes bridge arm and the on second
Two lower bridge arms, bridge arm includes the 5th switching tube on second, and the second lower bridge arm includes the 6th switching tube；
The first inductance and the second inductance are equipped in first arm path, bridge arm on first, the first inductance, the second inductance, the
One lower bridge arm is sequentially connected, and the first lower bridge arm is connected to the both ends of power of three-level DC converter by third diode, the
Bridge arm is connected to the both ends of power of three-level DC converter by the 4th diode on one.
Further, third inductance and the 4th inductance are equipped in the second arm path, bridge arm, third inductance, the 4th on second
Inductor, the second lower bridge arm are sequentially connected, and the second lower bridge arm is connected to the electricity of three-level DC converter by the 5th diode
Source both ends, bridge arm is connected to the both ends of power of three-level DC converter by the 6th diode on second.
In order to solve the above technical problems, the invention also provides a kind of three-phase five-level inverter, wherein five electricity of each phase
Flat inverter includes three-level DC converter, and the H-bridge circuit with inversion function, H-bridge circuit includes the first bridge of parallel connection
Arm branch and the second arm path, the first arm path include bridge arm and the first lower bridge arm on first, and bridge arm includes connecting on first
First switch pipe, the second switch pipe connect, first switch pipe connect three with the tie point of second switch pipe by the first diode
The reference point of level DC converter, the first lower bridge arm include connection third switching tube, the 4th switching tube, third switching tube and
The tie point of 4th switching tube connects the reference point by the second diode；Second arm path includes bridge arm and the on second
Two lower bridge arms, bridge arm includes the 5th switching tube on second, and the second lower bridge arm includes the 6th switching tube；
The first inductance and the second inductance are equipped in second arm path, bridge arm on second, the first inductance, the second inductance, the
Two lower bridge arms are sequentially connected, and the second lower bridge arm is connected to the both ends of power of three-level DC converter by third diode, the
Bridge arm is connected to the both ends of power of three-level DC converter by the 4th diode on one.
Further, bridge arm is parallel with bridge arm diode branch on first, and the first lower bridge arm is parallel with lower bridge arm diode
Branch, is both provided with corresponding diode in upper bridge arm diode branch and lower bridge arm diode branch, bridge arm and on first
One lower bridge arm is by third inductance for connecting power grid or the AC port of load.
Further, the upper bridge arm diode branch includes concatenated 5th diode, the 6th diode, the 5th diode
In parallel with first switch pipe, the 6th diode is in parallel with second switch pipe；The lower bridge arm diode branch includes concatenated
Seven diodes, the 8th diode, the 7th diode and third paralleled power switches, the 8th diode and the 4th paralleled power switches.
In order to solve the above technical problems, the invention also provides a kind of three-phase five-level inverter, wherein five electricity of each phase
Flat inverter includes three-level DC converter, and the H-bridge circuit with inversion function, H-bridge circuit includes the first bridge of parallel connection
Arm branch and the second arm path, the first arm path include bridge arm and the first lower bridge arm on first, and bridge arm includes connecting on first
First switch pipe, the second switch pipe connect, first switch pipe connect three with the tie point of second switch pipe by the first diode
The reference point of level DC converter, the first lower bridge arm include connection third switching tube, the 4th switching tube, third switching tube and
The tie point of 4th switching tube connects the reference point by the second diode；Second arm path includes bridge arm and the on second
Two lower bridge arms, bridge arm includes the 5th switching tube of connection, the 6th switching tube on second, and the second lower bridge arm includes the 7th of connection opening
Guan Guan, the 8th switching tube；
The first inductance and the second inductance are equipped in first arm path, bridge arm on first, the first inductance, the second inductance, the
One lower bridge arm is sequentially connected, and the first lower bridge arm is connected to the both ends of power of three-level DC converter by third diode, the
Bridge arm is connected to the both ends of power of three-level DC converter by the 4th diode on one；
Third inductance and the 4th inductance are equipped in second arm path, bridge arm on second, third inductance, the 4th inductance, the
Two lower bridge arms are sequentially connected, and the second lower bridge arm is connected to the both ends of power of three-level DC converter by the 5th diode, the
Bridge arm is connected to the both ends of power of three-level DC converter by the 6th diode on two.
Description of the drawings
Fig. 1 is a kind of five-electrical level inverter topological diagram in the prior art；
Fig. 2 is a kind of five-electrical level inverter topological diagram proposed in embodiment one；
Fig. 3 is another five-electrical level inverter topological diagram proposed in embodiment one；
Fig. 4-1 is topological diagram when five-electrical level inverter is in the first operation mode in Fig. 3；
Fig. 4-2 is topological diagram when five-electrical level inverter is in the second operation mode in Fig. 3；
Fig. 4-3 is topological diagram when five-electrical level inverter is in third operation mode in Fig. 3；
Fig. 4-4 is topological diagram when five-electrical level inverter is in four operation modes in Fig. 3；
Fig. 4-5 is topological diagram when five-electrical level inverter is in five operation modes in Fig. 3；
Fig. 4-6 is topological diagram when five-electrical level inverter is in six operation modes in Fig. 3；
Fig. 4-7 is topological diagram when five-electrical level inverter is in seven operation modes in Fig. 3；
Fig. 4-8 is topological diagram when five-electrical level inverter is in eight operation modes in Fig. 3；
Fig. 4-9 is topological diagram when five-electrical level inverter is in nine operation modes in Fig. 3；
Fig. 5 is the first the five-electrical level inverter topological diagram proposed in embodiment two；
Fig. 6 is second of the five-electrical level inverter topological diagram proposed in embodiment two；
Fig. 7 is the third five-electrical level inverter topological diagram proposed in embodiment two；
Fig. 8 is a kind of five-electrical level inverter topological diagram proposed in embodiment three；
Fig. 9 is the three-phase five-level inverter topological diagram that one-phase five-level inverter forms in Fig. 3.
Specific implementation mode
The specific implementation mode of the present invention is further described below in conjunction with the accompanying drawings.
Embodiment one：
The present invention proposes a kind of one-phase five-level inverter, as shown in Fig. 2, including three-level DC converter and with inverse
Become the H-bridge circuit of function.Three-level DC converter includes the power supply Vdc, capacitance C1, capacitance C2 being sequentially connected in series, capacitance C1, electricity
The reference point Oa of three-level DC converter is connected between appearance C2.
H-bridge circuit includes the first arm path and the second arm path of parallel connection, and the first arm path includes bridge on first
Arm and the first lower bridge arm, bridge arm includes switch transistor T a1, the switch transistor T a5 of connection, switch transistor T a1 and switch transistor T a5 on first
For tie point by the reference point Oa of diode Da5 connection three-level DC converters, the first lower bridge arm includes the switching tube of connection
Ta6, switch transistor T a4, switch transistor T a6 and the tie point of switch transistor T a4 connect reference point Oa by diode Da6.Second bridge arm
Branch includes bridge arm and the second lower bridge arm on second, and bridge arm includes switch transistor T a2 on second, and the second lower bridge arm includes switching tube
Ta3。
Inductance La2 and inductance La1 is equipped in first arm path, on first under bridge arm, inductance La2, inductance La1, first
Bridge arm is sequentially connected, and the first lower bridge arm is connected to the both ends power supply Vdc of three-level DC converter by diode Da1, and first
Upper bridge arm is connected to the both ends power supply Vdc of three-level DC converter by diode Da4.It is set between inductance La2, inductance La1
It is useful for connection power grid or the AC port N of load, is equipped with another on second between bridge arm and the second lower bridge arm for connecting
Power grid or the AC port A of load.
The present invention uses switching tube in the first arm path of H-bridge circuit and is led back with Diode series and inductance access
The mode on road, when primary side drive signal mistake leads to the bridge arm direct pass, the diode of setting can prevent bridge arm direct pass, effectively
It protects the switching tube on bridge arm not damage, improves the functional reliability of switching tube, meanwhile, switching tube need not be arranged extremely
Area.
Further, as shown in figure 3, being equipped with inductance La4 and inductance La3 in the second arm path, bridge arm, inductance on second
La4, inductance La3, the second lower bridge arm are sequentially connected, and the second lower bridge arm is connected to three-level DC converter by diode Da2
The both ends power supply Vdc, bridge arm is connected to the both ends power supply Vdc of three-level DC converter by diode Da3 on second.
By taking five-electrical level inverter shown in Fig. 3 as an example, circuit output-Vdc ,-Vdc/2,0 ,+Vdc/2 ,+Vdc totally five electricity
It is flat, 9 kinds of operation modes are shared, are illustrated separately below with reference to 4-1 to Fig. 4-9 pairs of nine kinds of operation modes of figure, wherein thin real
Line indicates that no electric current flows through, and heavy line indicates that electric current flows through.
As shown in Fig. 4-1, when inverter is operated in first mode, switch transistor T a1, switch transistor T a3, switch transistor T a5 conductings,
Switch transistor T a2, switch transistor T a4, switch transistor T a6, diode Da1, diode Da2, diode Da3, diode Da4, diode
Da5, diode Da6 shutdowns.Electric current flows through：Vdc positive output ends, switch transistor T a1, switch transistor T a5, inductance La2, load (or electricity
Net), inductance La3, switch transistor T a3, Vdc negative output terminal.Voltage between AC port N and AC port A is-Vdc.
As shown in the Fig. 4-2, when inverter is operated in second mode, switch transistor T a3, switch transistor T a5, diode Da5 conductings,
Switch transistor T a1, switch transistor T a2, switch transistor T a4, switch transistor T a6, diode Da1, diode Da2, diode Da3, diode
Da4, diode Da6 shutdowns.Electric current flows through：Reference point Oa, diode Da5, switch transistor T a5, inductance La2, load (or power grid),
Inductance La3, switch transistor T a3, Vdc negative output terminal.Voltage between AC port N and AC port A is-Vdc/2.
As shown in Fig. 4-3, when inverter is operated in third mode, switch transistor T a2, switch transistor T a5, diode Da5 conductings,
Switch transistor T a1, switch transistor T a3, switch transistor T a4, switch transistor T a6, diode Da1, diode Da2, diode Da3, diode
Da4, diode Da6.Electric current flows through：Reference point Oa, diode Da5, switch transistor T a5, inductance La2, load (or power grid), inductance
La4, switch transistor T a2, Vdc positive output end.Voltage between AC port N and AC port A is-Vdc/2.
As shown in Fig. 4-4, when inverter is operated in four mode, switch transistor T a1, switch transistor T a2, switch transistor T a5 conductings,
Switch transistor T a3, switch transistor T a4, switch transistor T a6, diode Da1, diode Da2, diode Da3, diode Da4, diode
Da5, diode Da6 shutdowns.When switch transistor T a1, switch transistor T a2, switch transistor T a5 are opened, AC port N and AC port A
Between voltage be 0.
As illustrated in figures 4-5, when inverter is operated in five mode, switch transistor T a5, switch transistor T a6, diode Da5, two poles
Pipe Da6 conductings, switch transistor T a1, switch transistor T a2, switch transistor T a3, switch transistor T a4, diode Da1, diode Da2, diode
Da3, diode Da4 shutdowns.When switch transistor T a5, switch transistor T a6 are opened, the voltage between AC port N and AC port A
It is 0.
As Figure 4-Figure 6, when inverter is operated in six mode, switch transistor T a3, switch transistor T a4, switch transistor T a6 conductings,
Switch transistor T a1, switch transistor T a2, switch transistor T a5, diode Da1, diode Da2, diode Da3, diode Da4, diode
Da5, diode Da6 shutdowns.When switch transistor T a3, switch transistor T a4, switch transistor T a6 are opened, AC port N and AC port A
Between voltage be 0.
As shown in figs. 4-7, when inverter is operated in seven mode, switch transistor T a3, switch transistor T a6, diode Da6 conductings,
Switch transistor T a1, switch transistor T a2, switch transistor T a4, switch transistor T a5, diode Da1, diode Da2, diode Da3, diode
Da4, diode Da5 shutdowns.Electric current flows through：Vdc negative output terminals, switch transistor T a3, inductance La3, load (or power grid), inductance
La1, switch transistor T a6, diode Da6, reference point Oa.Voltage between AC port N and AC port A is+Vdc/2.
As shown in Figure 4-8, when inverter is operated in eight mode, switch transistor T a2, switch transistor T a6, diode Da6 conductings,
Switch transistor T a1, switch transistor T a3, switch transistor T a4, switch transistor T a5, diode Da1, diode Da2, diode Da3, diode
Da4, diode Da5 shutdowns.Electric current flows through：Vdc positive output ends, switch transistor T a2, inductance La4, load (or power grid), inductance
La1, switch transistor T a6, diode Da6, reference point Oa.Voltage between AC port N and AC port A is+Vdc/2.
As shown in figures 4-9, when inverter is operated in nine mode, switch transistor T a2, switch transistor T a4, switch transistor T a6 conductings,
Switch transistor T a1, switch transistor T a3, switch transistor T a5, diode Da1, diode Da2, diode Da3, diode Da4, diode
Da5, diode Da6 shutdowns.Electric current flows through：Vdc positive output ends, switch transistor T a2, inductance La4, load (or power grid), inductance
La1, switch transistor T a6, switch transistor T a4, Vdc negative output terminal.Voltage between AC port N and AC port A is+Vdc.
The five-electrical level inverters of Fig. 2 as shown in figure 3 are compared, and are reduced diode Da2, Da3 cost, but still can be prevented open
It is straight-through to close pipe Ta1, Ta4, Ta5, Ta6, switching device number used is reduced, to save cost, reduce inverter size and
Cost reduces loss caused by switching device, the efficiency of inverter is improved, to improve the efficiency and power of whole system
Density.
In addition, three one-phase five-level inverters as shown in Figure 2 or Figure 3 are respectively connected to AC port (A, N), exchange
Port (B, N), AC port (C, N) form three-phase five-level inverter, and respectively A, B, C three-phase, N are neutral point.Wherein,
Each phase five-electrical level inverter includes above-mentioned three-level DC converter, the H-bridge circuit with inversion function.With three as schemed
For one-phase five-level inverter composition three-phase five-level inverter shown in 3, the topology such as Fig. 9 of three-phase five-level inverter
It is shown.
Embodiment two：
The present invention proposes a kind of one-phase five-level inverter, as shown in figure 5, including three-level DC converter and with inverse
Become the H-bridge circuit of function.Three-level DC converter includes the power supply Vdc, capacitance C1, capacitance C2 being sequentially connected in series, capacitance C1, electricity
The reference point Oa of three-level DC converter is connected between appearance C2.
H-bridge circuit includes the first arm path and the second arm path of parallel connection, and the first arm path includes bridge on first
Arm and the first lower bridge arm, bridge arm includes switch transistor T a1, the switch transistor T a5 of connection, switch transistor T a1 and switch transistor T a5 on first
For tie point by the reference point Oa of diode Da5 connection three-level DC converters, the first lower bridge arm includes the switching tube of connection
Ta6, switch transistor T a7, switch transistor T a6 and the tie point of switch transistor T a7 connect the reference point Oa by diode Da6.Second
Arm path includes bridge arm and the second lower bridge arm on second, and bridge arm includes switch transistor T a2 on second, and the second lower bridge arm includes switch
Pipe Ta3.
Inductance La4 and inductance La3 is equipped in second arm path, on second under bridge arm, inductance La4, inductance La3, second
Bridge arm is sequentially connected, and the second lower bridge arm is connected to the both ends power supply Vdc of three-level DC converter by diode Da2, and first
Upper bridge arm is connected to the both ends power supply Vdc of three-level DC converter by diode Da3.It is set between inductance La4 and inductance La3
It is equipped with the AC port A for connecting power grid or load, another is equipped between bridge arm and the first lower bridge arm for connecting on first
The AC port N for getting access to grid or loading.
The present invention uses switching tube in H-bridge circuit in the second arm path and is led back with Diode series and inductance access
The mode on road, when primary side drive signal mistake leads to the bridge arm direct pass, the diode of setting can prevent bridge arm direct pass, effectively
It protects the switching tube on bridge arm not damage, improves the functional reliability of switching tube, meanwhile, switching tube need not be arranged extremely
Area.
Above-mentioned Fig. 5 compared with five-electrical level inverter as shown in Figure 3 in embodiment one, reduce diode Da1, Da4 at
This, but still switch transistor T a2, Ta3 can be prevented straight-through, switching device number used is reduced, and to save cost, reduces inverter
Size and cost, reduce loss caused by switching device, the efficiency of inverter improved, to improve the effect of whole system
Rate and power density.
Further, as shown in fig. 6, bridge arm is parallel with bridge arm diode branch on first, the first lower bridge arm is parallel with down
Bridge arm diode branch, upper bridge arm diode branch are provided with diode Da1, diode are provided in lower bridge arm diode branch
Da4, bridge arm and the first lower bridge arm are by third inductance La2 for connecting power grid or the AC port N of load on first.
The present invention is by bridge arm, the first lower bridge arm on first respectively in parallel upper bridge arm diode branch, lower bridge arm two
Pole pipe branch makes the circuit for flowing through switching tube halve in such a way that switching tube and diodes in parallel use, and plays the work of shunting
With.That is switch transistor T a1, Ta5 and diode Da1 shuntings, make the electric current for flowing through switch transistor T a1, Ta5 and diode Da1 halve；It opens
Pipe Ta6, Ta4 and diode Da4 shuntings are closed, so that the electric current for flowing through switch transistor T a6, Ta4 and diode Da4 is halved, further carries
High the current flowing ability of major loop, the five-electrical level inverter can still prevent switch transistor T a2, Ta3 straight-through.
As a kind of replacement of five-electrical level inverter shown in Fig. 6, upper bridge arm diode branch includes concatenated diode
Da1, diode Da7, as shown in fig. 7, diode Da7 is in parallel with switch transistor T a1, diode Da1 is in parallel with switch transistor T a5；Under
Bridge arm diode branch includes concatenated diode Da8, diode Da4, and diode Da8 is in parallel with switch transistor T a6, diode
Da4 is in parallel with switch transistor T a4.
All switching tubes of the first arm path of the present invention are respectively parallel with diode, make to flow through each switching tube
Electric current halves, i.e. switch transistor T a1 and diode Da7, switch transistor T a5 and diode Da1 shuntings, switch transistor T a6 and diode Da8
Shunting, switch transistor T a4 and diode Da4 shuntings, further improve current flowing ability.
In addition, by three as Fig. 5, Fig. 6 or shown in Fig. 7 one-phase five-level inverters be respectively connected to AC port (A, N),
AC port (B, N), AC port (C, N) form three-phase five-level inverter, and respectively A, B, C three-phase, N are neutral point.Its
In, each phase five-electrical level inverter includes above-mentioned three-level DC converter, the H-bridge circuit with inversion function.
Embodiment three：
The present invention proposes a kind of one-phase five-level inverter, as shown in figure 8, including three-level DC converter and with inverse
Become the H-bridge circuit of function.Three-level DC converter includes the power supply Vdc, capacitance C1, capacitance C2 being sequentially connected in series, capacitance C1, electricity
The reference point Oa of three-level DC converter is connected between appearance C2.
H-bridge circuit includes the first arm path and the second arm path of parallel connection, and the first arm path includes bridge on first
Arm and the first lower bridge arm, bridge arm includes switch transistor T a1, the switch transistor T a5 of connection, switch transistor T a1 and switch transistor T a5 on first
For tie point by the reference point Oa of diode Da5 connection three-level DC converters, the first lower bridge arm includes the switching tube of connection
Ta6, the 4th switch transistor T a4, switch transistor T a6 and the tie point of switch transistor T a4 connect the reference point Oa by diode Da6.
Second arm path includes bridge arm and the second lower bridge arm on second, on second bridge arm include connection switch transistor T a2,
Switch transistor T a7, switch transistor T a2 connect the reference of three-level DC converter with the tie point of switch transistor T a7 by diode Da7
Point Oa.Second lower bridge arm includes that the tie point of switch transistor T a8, the switch transistor T a3 of connection, switch transistor T a8 and switch transistor T a3 pass through
The reference point Oa of diode Da8 connection three-level DC converters.
Inductance La2 and inductance La1 is equipped in first arm path, on first under bridge arm, inductance La2, inductance La1, first
Bridge arm is sequentially connected, and the first lower bridge arm is connected to the both ends power supply Vdc of three-level DC converter by diode Da1, and first
Upper bridge arm is connected to the both ends power supply Vdc of three-level DC converter by diode Da4.
Inductance La4 and inductance La3 is equipped in second arm path, on second under bridge arm, inductance La4, inductance La3, second
Bridge arm is sequentially connected, and the second lower bridge arm is connected to the both ends power supply Vdc of three-level DC converter by diode Da2, and second
Upper bridge arm is connected to the both ends power supply Vdc of three-level DC converter by diode Da3.
The first arm path and the second arm path of the present invention uses identical circuit structure, and each arm path is equal
The mode for using switching tube and Diode series and inductance access major loop, when primary side drive signal mistake causes the bridge arm straight
When logical, the diode of setting can prevent bridge arm direct pass, and the switching tube on effective protection bridge arm will not damage, and improve switch
The functional reliability of pipe, meanwhile, dead zone need not be arranged in switching tube.
Two arm paths of above-mentioned five-electrical level inverter are opened up with the first arm path as shown in Figure 3 in embodiment one
It is identical to flutter structure, in order to reduce switching device number, saves cost, two arm paths in the present embodiment can also use
In embodiment two as first arm path of Fig. 5, Fig. 6 or shown in Fig. 7 topological structure, with reduce inverter size and at
This, improves inverter efficiency and power density.
In addition, three above-mentioned one-phase five-level inverters are respectively connected to AC port (A, N), AC port (B, N), are handed over
Flow port (C, N) forms three-phase five-level inverter, and respectively A, B, C three-phase, N are neutral point.Wherein, five level of each phase
Inverter includes above-mentioned three-level DC converter, the H-bridge circuit with inversion function.
The five-electrical level inverter Topology Switch pipe that above example one, embodiment two and embodiment three propose can be not only
IGBT can also be MOSFET or Si (silicon) device, can also be other switching tubes.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification made by all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (10)
1. a kind of one-phase five-level inverter, including three-level DC converter and the H-bridge circuit with inversion function, feature
Be, H-bridge circuit includes in parallel the first arm path and the second arm path, the first arm path include on first bridge arm and
First lower bridge arm, bridge arm includes the first switch pipe of connection, second switch pipe on first, first switch pipe and second switch pipe
Tie point connects the reference point of three-level DC converter by the first diode, and the first lower bridge arm includes the third switch of connection
The tie point of pipe, the 4th switching tube, third switching tube and the 4th switching tube connects the reference point by the second diode；Second
Arm path includes bridge arm and the second lower bridge arm on second, and bridge arm includes the 5th switching tube on second, and the second lower bridge arm includes the
Six switching tubes；
The first inductance and the second inductance are equipped in first arm path, on first under bridge arm, the first inductance, the second inductance, first
Bridge arm is sequentially connected, and the first lower bridge arm is connected to the both ends of power of three-level DC converter by third diode, on first
Bridge arm is connected to the both ends of power of three-level DC converter by the 4th diode.
2. one-phase five-level inverter according to claim 1, which is characterized in that be equipped with third electricity in the second arm path
Sense and the 4th inductance, bridge arm, third inductance, the 4th inductor, the second lower bridge arm are sequentially connected on second, and the second lower bridge arm passes through
5th diode is connected to the both ends of power of three-level DC converter, and bridge arm is connected to three electricity by the 6th diode on second
The both ends of power of straight current converter.
3. a kind of one-phase five-level inverter, including three-level DC converter and the H-bridge circuit with inversion function, feature
Be, H-bridge circuit includes in parallel the first arm path and the second arm path, the first arm path include on first bridge arm and
First lower bridge arm, bridge arm includes the first switch pipe of connection, second switch pipe on first, first switch pipe and second switch pipe
Tie point connects the reference point of three-level DC converter by the first diode, and the first lower bridge arm includes the third switch of connection
The tie point of pipe, the 4th switching tube, third switching tube and the 4th switching tube connects the reference point by the second diode；Second
Arm path includes bridge arm and the second lower bridge arm on second, and bridge arm includes the 5th switching tube on second, and the second lower bridge arm includes the
Six switching tubes；
The first inductance and the second inductance are equipped in second arm path, on second under bridge arm, the first inductance, the second inductance, second
Bridge arm is sequentially connected, and the second lower bridge arm is connected to the both ends of power of three-level DC converter by third diode, on first
Bridge arm is connected to the both ends of power of three-level DC converter by the 4th diode.
4. one-phase five-level inverter according to claim 3, which is characterized in that bridge arm is parallel with bridge arm two on first
Pole pipe branch, the first lower bridge arm are parallel with lower bridge arm diode branch, upper bridge arm diode branch and lower bridge arm diode branch
In be both provided with corresponding diode, bridge arm and the first lower bridge arm are by third inductance for connecting power grid or load on first
AC port.
5. one-phase five-level inverter according to claim 4, which is characterized in that the upper bridge arm diode branch includes
Concatenated 5th diode, the 6th diode, the 5th diode is in parallel with first switch pipe, the 6th diode and second switch pipe
It is in parallel；The lower bridge arm diode branch includes concatenated 7th diode, the 8th diode, and the 7th diode is switched with third
Pipe is in parallel, the 8th diode and the 4th paralleled power switches.
6. a kind of one-phase five-level inverter, including three-level DC converter and the H-bridge circuit with inversion function, feature
Be, H-bridge circuit includes in parallel the first arm path and the second arm path, the first arm path include on first bridge arm and
First lower bridge arm, bridge arm includes the first switch pipe of connection, second switch pipe on first, first switch pipe and second switch pipe
Tie point connects the reference point of three-level DC converter by the first diode, and the first lower bridge arm includes the third switch of connection
The tie point of pipe, the 4th switching tube, third switching tube and the 4th switching tube connects the reference point by the second diode；Second
Arm path includes bridge arm and the second lower bridge arm on second, and bridge arm includes the 5th switching tube of connection, the 6th switching tube on second,
The tie point of 5th switching tube and the 6th switching tube by third diode connect three-level DC converter reference point, second
Lower bridge arm includes the 7th switching tube of connection, the 8th switching tube, and the tie point of the 7th switching tube and the 8th switching tube passes through the 4th
Diode connects the reference point of three-level DC converter；
The first inductance and the second inductance are equipped in first arm path, on first under bridge arm, the first inductance, the second inductance, first
Bridge arm is sequentially connected, and the first lower bridge arm is connected to the both ends of power of three-level DC converter by the 5th diode, on first
Bridge arm is connected to the both ends of power of three-level DC converter by the 6th diode；
Third inductance and the 4th inductance are equipped in second arm path, on second under bridge arm, third inductance, the 4th inductance, second
Bridge arm is sequentially connected, and the second lower bridge arm is connected to the both ends of power of three-level DC converter by the 7th diode, on second
Bridge arm is connected to the both ends of power of three-level DC converter by the 8th diode.
7. a kind of three-phase five-level inverter has wherein each phase five-electrical level inverter includes three-level DC converter
The H-bridge circuit of inversion function, which is characterized in that H-bridge circuit includes in parallel the first arm path and the second arm path, and first
Arm path includes bridge arm and the first lower bridge arm on first, and bridge arm includes the first switch pipe of connection, second switch pipe on first,
First switch pipe connects the reference point of three-level DC converter with the tie point of second switch pipe by the first diode, and first
Lower bridge arm includes the third switching tube of connection, the 4th switching tube, and the tie point of third switching tube and the 4th switching tube passes through second
Diode connects the reference point；Second arm path includes bridge arm and the second lower bridge arm on second, and bridge arm includes the on second
Five switching tubes, the second lower bridge arm include the 6th switching tube；
The first inductance and the second inductance are equipped in first arm path, on first under bridge arm, the first inductance, the second inductance, first
Bridge arm is sequentially connected, and the first lower bridge arm is connected to the both ends of power of three-level DC converter by third diode, on first
Bridge arm is connected to the both ends of power of three-level DC converter by the 4th diode.
8. three-phase five-level inverter according to claim 7, which is characterized in that be equipped with third electricity in the second arm path
Sense and the 4th inductance, bridge arm, third inductance, the 4th inductor, the second lower bridge arm are sequentially connected on second, and the second lower bridge arm passes through
5th diode is connected to the both ends of power of three-level DC converter, and bridge arm is connected to three electricity by the 6th diode on second
The both ends of power of straight current converter.
9. a kind of three-phase five-level inverter has wherein each phase five-electrical level inverter includes three-level DC converter
The H-bridge circuit of inversion function, which is characterized in that H-bridge circuit includes in parallel the first arm path and the second arm path, and first
Arm path includes bridge arm and the first lower bridge arm on first, and bridge arm includes the first switch pipe of connection, second switch pipe on first,
First switch pipe connects the reference point of three-level DC converter with the tie point of second switch pipe by the first diode, and first
Lower bridge arm includes the third switching tube of connection, the 4th switching tube, and the tie point of third switching tube and the 4th switching tube passes through second
Diode connects the reference point；Second arm path includes bridge arm and the second lower bridge arm on second, and bridge arm includes the on second
Five switching tubes, the second lower bridge arm include the 6th switching tube；
The first inductance and the second inductance are equipped in second arm path, on second under bridge arm, the first inductance, the second inductance, second
Bridge arm is sequentially connected, and the second lower bridge arm is connected to the both ends of power of three-level DC converter by third diode, on first
Bridge arm is connected to the both ends of power of three-level DC converter by the 4th diode.
10. a kind of three-phase five-level inverter has wherein each phase five-electrical level inverter includes three-level DC converter
The H-bridge circuit of inversion function, which is characterized in that H-bridge circuit includes in parallel the first arm path and the second arm path, and first
Arm path includes bridge arm and the first lower bridge arm on first, and bridge arm includes the first switch pipe of connection, second switch pipe on first,
First switch pipe connects the reference point of three-level DC converter with the tie point of second switch pipe by the first diode, and first
Lower bridge arm includes the third switching tube of connection, the 4th switching tube, and the tie point of third switching tube and the 4th switching tube passes through second
Diode connects the reference point；Second arm path includes bridge arm and the second lower bridge arm on second, and bridge arm includes connecting on second
The tie point of the 5th switching tube, the 6th switching tube connect, the 5th switching tube and the 6th switching tube connects three by third diode
The reference point of level DC converter, the second lower bridge arm include connection the 7th switching tube, the 8th switching tube, the 7th switching tube and
The tie point of 8th switching tube connects the reference point of three-level DC converter by the 4th diode；
The first inductance and the second inductance are equipped in first arm path, on first under bridge arm, the first inductance, the second inductance, first
Bridge arm is sequentially connected, and the first lower bridge arm is connected to the both ends of power of three-level DC converter by the 5th diode, on first
Bridge arm is connected to the both ends of power of three-level DC converter by the 6th diode；
Third inductance and the 4th inductance are equipped in second arm path, on second under bridge arm, third inductance, the 4th inductance, second
Bridge arm is sequentially connected, and the second lower bridge arm is connected to the both ends of power of three-level DC converter by the 7th diode, on second
Bridge arm is connected to the both ends of power of three-level DC converter by the 8th diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810273466.7A CN108448920A (en) | 2018-03-29 | 2018-03-29 | A kind of five-electrical level inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810273466.7A CN108448920A (en) | 2018-03-29 | 2018-03-29 | A kind of five-electrical level inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108448920A true CN108448920A (en) | 2018-08-24 |
Family
ID=63197822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810273466.7A Pending CN108448920A (en) | 2018-03-29 | 2018-03-29 | A kind of five-electrical level inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108448920A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217704A (en) * | 2018-11-02 | 2019-01-15 | 湖南大学 | A kind of inhibition system leakage current non-isolation type five-electrical level inverter |
| CN110492772A (en) * | 2019-08-08 | 2019-11-22 | 中国电力科学研究院有限公司 | A kind of three-level converter based on SiC MOSFET |
| CN111740630A (en) * | 2020-07-07 | 2020-10-02 | 河北申科电力股份有限公司 | High-voltage high-power converter module and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102843054A (en) * | 2012-09-06 | 2012-12-26 | 阳光电源股份有限公司 | Single-phase five-level inverter |
| CN102934346A (en) * | 2010-06-07 | 2013-02-13 | Abb公司 | Inverter for solar cell array |
| CN203562975U (en) * | 2013-09-25 | 2014-04-23 | 王利 | Neutral point clamped three-level controllable switch current transformer with fewest components |
| CN106655853A (en) * | 2015-07-22 | 2017-05-10 | 艾默生网络能源有限公司 | Three-level inverter |
-
2018
- 2018-03-29 CN CN201810273466.7A patent/CN108448920A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102934346A (en) * | 2010-06-07 | 2013-02-13 | Abb公司 | Inverter for solar cell array |
| CN102843054A (en) * | 2012-09-06 | 2012-12-26 | 阳光电源股份有限公司 | Single-phase five-level inverter |
| CN203562975U (en) * | 2013-09-25 | 2014-04-23 | 王利 | Neutral point clamped three-level controllable switch current transformer with fewest components |
| CN106655853A (en) * | 2015-07-22 | 2017-05-10 | 艾默生网络能源有限公司 | Three-level inverter |
Non-Patent Citations (1)
| Title |
|---|
| 冯长青等: "新型单相双Buck并网逆变器", 《机械制造与自动化》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217704A (en) * | 2018-11-02 | 2019-01-15 | 湖南大学 | A kind of inhibition system leakage current non-isolation type five-electrical level inverter |
| CN110492772A (en) * | 2019-08-08 | 2019-11-22 | 中国电力科学研究院有限公司 | A kind of three-level converter based on SiC MOSFET |
| CN111740630A (en) * | 2020-07-07 | 2020-10-02 | 河北申科电力股份有限公司 | High-voltage high-power converter module and control method thereof |
| CN111740630B (en) * | 2020-07-07 | 2021-10-22 | 河北申科电力股份有限公司 | High-voltage high-power converter module and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106329974B (en) | Five LCU level conversion units | |
| CN104038090B (en) | A kind of based on the antiparallel T-shaped multi-level inverter circuit of reverse blocking IGBT | |
| CN108282103A (en) | A kind of five-electrical level inverter | |
| CN108448920A (en) | A kind of five-electrical level inverter | |
| CN109194170A (en) | A kind of seven electrical level inverters using switched-capacitor circuit | |
| CN109149986A (en) | The hybrid Modular multilevel converter of one type, three level and its control method | |
| CN106849717B (en) | Striding capacitance tri-level single electrode current module | |
| Mishra et al. | Comparison of total harmonic distortion of modular multilevel converter and parallel hybrid modular multilevel converter | |
| CN207691703U (en) | A kind of DC/AC modules of photovoltaic generating system | |
| CN109546879A (en) | Single-phase three level combination clamping type inverter circuit and the inverter with it | |
| CN106329975B (en) | Five LCU level conversion units | |
| CN106849728A (en) | The control method of the Clamp three-phase non-isolated photovoltaic DC-to-AC converter with continued flow switch | |
| CN106712558B (en) | Five level three-phase dual input inverter of high reliability | |
| CN105471296B (en) | Inverter circuit | |
| CN208767993U (en) | A kind of electrical level inverter using switched-capacitor circuit | |
| CN107478957A (en) | Full-bridge modules topology and test method for the experiment of direct current transportation fault current | |
| CN207354075U (en) | A kind of modified two-way series Z sources three-level inverter | |
| CN205356180U (en) | MMC topology with reinforcing voltage characteristic half -bridge full -bridge mixed type | |
| CN208241591U (en) | A kind of novel double electrical level inverters using thyristor and IGBT | |
| CN109546878A (en) | A kind of seven level circuit topological structures for power conversion system | |
| CN110165923A (en) | A kind of inverter circuit | |
| CN106533218B (en) | A kind of rectified three-phase circuit and drive control method | |
| CN206041848U (en) | Novel topological structure of two contravariant output translators | |
| CN106100403B (en) | A kind of multi output Z sources half-bridge converter | |
| CN107482892A (en) | Energy snubber circuit and current transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180824 |
|
| RJ01 | Rejection of invention patent application after publication |